/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/array-eq-symm.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-9bbddad6b14272d9691b7fb6f1c011d15ab18596-9bbddad [2021-06-12 19:17:26,905 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-12 19:17:26,906 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-12 19:17:26,934 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-12 19:17:26,984 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-06-12 19:17:27,004 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-12 19:17:27,005 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-12 19:17:27,005 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-12 19:17:27,005 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-12 19:17:27,006 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-12 19:17:27,006 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-12 19:17:27,006 INFO L138 SettingsManager]: * Use SBE=true [2021-06-12 19:17:27,006 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-12 19:17:27,007 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-12 19:17:27,007 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-12 19:17:27,007 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-12 19:17:27,007 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-12 19:17:27,007 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-12 19:17:27,007 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-12 19:17:27,007 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-12 19:17:27,008 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-12 19:17:27,008 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-12 19:17:27,008 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-12 19:17:27,008 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-12 19:17:27,008 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-12 19:17:27,008 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-12 19:17:27,008 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-12 19:17:27,009 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-12 19:17:27,009 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-12 19:17:27,009 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-12 19:17:27,009 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-12 19:17:27,009 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-12 19:17:27,009 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-12 19:17:27,009 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-12 19:17:27,010 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-12 19:17:27,010 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-12 19:17:27,010 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-12 19:17:27,307 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-12 19:17:27,339 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-12 19:17:27,342 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-12 19:17:27,343 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-12 19:17:27,344 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-12 19:17:27,345 INFO L432 ainManager$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 [2021-06-12 19:17:27,364 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/array-eq-symm.wvr.bpl' [2021-06-12 19:17:27,389 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-12 19:17:27,391 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-12 19:17:27,392 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-12 19:17:27,393 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-12 19:17:27,393 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-12 19:17:27,404 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 12.06 07:17:27" (1/1) ... [2021-06-12 19:17:27,413 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 12.06 07:17:27" (1/1) ... [2021-06-12 19:17:27,424 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-12 19:17:27,425 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-12 19:17:27,426 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-12 19:17:27,426 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-12 19:17:27,432 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 12.06 07:17:27" (1/1) ... [2021-06-12 19:17:27,433 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 12.06 07:17:27" (1/1) ... [2021-06-12 19:17:27,433 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 12.06 07:17:27" (1/1) ... [2021-06-12 19:17:27,434 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 12.06 07:17:27" (1/1) ... [2021-06-12 19:17:27,436 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 12.06 07:17:27" (1/1) ... [2021-06-12 19:17:27,438 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 12.06 07:17:27" (1/1) ... [2021-06-12 19:17:27,439 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 12.06 07:17:27" (1/1) ... [2021-06-12 19:17:27,439 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-12 19:17:27,440 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-12 19:17:27,440 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-12 19:17:27,441 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-12 19:17:27,442 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "array-eq-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 07:17:27" (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 [2021-06-12 19:17:27,510 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-12 19:17:27,511 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-12 19:17:27,511 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-12 19:17:27,512 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-12 19:17:27,512 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-12 19:17:27,512 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-12 19:17:27,513 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-12 19:17:27,513 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-12 19:17:27,513 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-12 19:17:27,514 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-12 19:17:27,727 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-12 19:17:27,727 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-12 19:17:27,729 INFO L202 PluginConnector]: Adding new model array-eq-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.06 07:17:27 BoogieIcfgContainer [2021-06-12 19:17:27,729 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-12 19:17:27,732 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-12 19:17:27,732 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-12 19:17:27,735 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-12 19:17:27,735 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "array-eq-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 12.06 07:17:27" (1/2) ... [2021-06-12 19:17:27,736 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77aa0042 and model type array-eq-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.06 07:17:27, skipping insertion in model container [2021-06-12 19:17:27,737 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 12.06 07:17:27" (2/2) ... [2021-06-12 19:17:27,745 INFO L111 eAbstractionObserver]: Analyzing ICFG array-eq-symm.wvr.bpl [2021-06-12 19:17:27,749 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-12 19:17:27,749 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-12 19:17:27,750 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-12 19:17:27,750 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-12 19:17:27,783 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-06-12 19:17:27,800 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-06-12 19:17:27,816 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-12 19:17:27,816 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-12 19:17:27,817 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-12 19:17:27,817 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-12 19:17:27,817 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-12 19:17:27,817 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-12 19:17:27,817 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-12 19:17:27,817 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-12 19:17:27,825 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 28 places, 25 transitions, 66 flow [2021-06-12 19:17:27,849 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) [2021-06-12 19:17:27,851 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) [2021-06-12 19:17:27,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-06-12 19:17:27,857 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:17:27,857 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:17:27,858 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:17:27,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:17:27,878 INFO L82 PathProgramCache]: Analyzing trace with hash -169700611, now seen corresponding path program 1 times [2021-06-12 19:17:27,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:17:27,886 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143642693] [2021-06-12 19:17:27,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:17:27,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:17:28,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:17:28,063 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:17:28,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143642693] [2021-06-12 19:17:28,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143642693] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 19:17:28,064 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 19:17:28,064 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-12 19:17:28,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914365437] [2021-06-12 19:17:28,069 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-12 19:17:28,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:17:28,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-12 19:17:28,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-12 19:17:28,087 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) [2021-06-12 19:17:28,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:17:28,167 INFO L93 Difference]: Finished difference Result 102 states and 226 transitions. [2021-06-12 19:17:28,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-12 19:17:28,169 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 [2021-06-12 19:17:28,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:17:28,179 INFO L225 Difference]: With dead ends: 102 [2021-06-12 19:17:28,179 INFO L226 Difference]: Without dead ends: 95 [2021-06-12 19:17:28,180 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-12 19:17:28,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-06-12 19:17:28,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 82. [2021-06-12 19:17:28,227 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) [2021-06-12 19:17:28,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 185 transitions. [2021-06-12 19:17:28,231 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 185 transitions. Word has length 11 [2021-06-12 19:17:28,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:17:28,232 INFO L482 AbstractCegarLoop]: Abstraction has 82 states and 185 transitions. [2021-06-12 19:17:28,232 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) [2021-06-12 19:17:28,232 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 185 transitions. [2021-06-12 19:17:28,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-12 19:17:28,235 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:17:28,235 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:17:28,235 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-12 19:17:28,235 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:17:28,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:17:28,239 INFO L82 PathProgramCache]: Analyzing trace with hash -214361416, now seen corresponding path program 1 times [2021-06-12 19:17:28,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:17:28,240 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76438079] [2021-06-12 19:17:28,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:17:28,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:17:28,321 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:17:28,321 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:17:28,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76438079] [2021-06-12 19:17:28,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76438079] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 19:17:28,322 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 19:17:28,322 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-12 19:17:28,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778432104] [2021-06-12 19:17:28,324 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-12 19:17:28,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:17:28,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-12 19:17:28,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-12 19:17:28,327 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) [2021-06-12 19:17:28,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:17:28,419 INFO L93 Difference]: Finished difference Result 160 states and 352 transitions. [2021-06-12 19:17:28,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 19:17:28,421 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 [2021-06-12 19:17:28,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:17:28,426 INFO L225 Difference]: With dead ends: 160 [2021-06-12 19:17:28,426 INFO L226 Difference]: Without dead ends: 160 [2021-06-12 19:17:28,427 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 31.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-12 19:17:28,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-06-12 19:17:28,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 94. [2021-06-12 19:17:28,441 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) [2021-06-12 19:17:28,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 215 transitions. [2021-06-12 19:17:28,442 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 215 transitions. Word has length 14 [2021-06-12 19:17:28,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:17:28,442 INFO L482 AbstractCegarLoop]: Abstraction has 94 states and 215 transitions. [2021-06-12 19:17:28,442 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) [2021-06-12 19:17:28,442 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 215 transitions. [2021-06-12 19:17:28,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-12 19:17:28,443 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:17:28,443 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:17:28,443 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-12 19:17:28,444 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:17:28,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:17:28,444 INFO L82 PathProgramCache]: Analyzing trace with hash -632263843, now seen corresponding path program 1 times [2021-06-12 19:17:28,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:17:28,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911483365] [2021-06-12 19:17:28,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:17:28,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:17:28,535 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:17:28,535 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:17:28,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911483365] [2021-06-12 19:17:28,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1911483365] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:17:28,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794538913] [2021-06-12 19:17:28,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-06-12 19:17:28,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:17:28,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-12 19:17:28,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:17:28,703 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:17:28,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [794538913] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:17:28,704 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:17:28,704 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-06-12 19:17:28,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247196959] [2021-06-12 19:17:28,704 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-12 19:17:28,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:17:28,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-12 19:17:28,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-12 19:17:28,705 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) [2021-06-12 19:17:28,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:17:28,785 INFO L93 Difference]: Finished difference Result 176 states and 390 transitions. [2021-06-12 19:17:28,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 19:17:28,786 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 [2021-06-12 19:17:28,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:17:28,787 INFO L225 Difference]: With dead ends: 176 [2021-06-12 19:17:28,787 INFO L226 Difference]: Without dead ends: 176 [2021-06-12 19:17:28,787 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 52.2ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-12 19:17:28,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-06-12 19:17:28,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 103. [2021-06-12 19:17:28,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 2.3137254901960786) internal successors, (236), 102 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:17:28,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 236 transitions. [2021-06-12 19:17:28,795 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 236 transitions. Word has length 14 [2021-06-12 19:17:28,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:17:28,795 INFO L482 AbstractCegarLoop]: Abstraction has 103 states and 236 transitions. [2021-06-12 19:17:28,795 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) [2021-06-12 19:17:28,796 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 236 transitions. [2021-06-12 19:17:28,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-12 19:17:28,797 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:17:28,797 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:17:29,021 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-06-12 19:17:29,021 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:17:29,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:17:29,021 INFO L82 PathProgramCache]: Analyzing trace with hash -1209640048, now seen corresponding path program 2 times [2021-06-12 19:17:29,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:17:29,022 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103758449] [2021-06-12 19:17:29,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:17:29,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:17:29,073 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:17:29,073 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:17:29,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103758449] [2021-06-12 19:17:29,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103758449] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 19:17:29,073 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 19:17:29,073 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-12 19:17:29,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126505464] [2021-06-12 19:17:29,074 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-12 19:17:29,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:17:29,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-12 19:17:29,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-12 19:17:29,075 INFO L87 Difference]: Start difference. First operand 103 states and 236 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) [2021-06-12 19:17:29,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:17:29,116 INFO L93 Difference]: Finished difference Result 144 states and 333 transitions. [2021-06-12 19:17:29,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-12 19:17:29,116 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 [2021-06-12 19:17:29,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:17:29,117 INFO L225 Difference]: With dead ends: 144 [2021-06-12 19:17:29,117 INFO L226 Difference]: Without dead ends: 142 [2021-06-12 19:17:29,118 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-12 19:17:29,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-06-12 19:17:29,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 103. [2021-06-12 19:17:29,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 2.303921568627451) internal successors, (235), 102 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:17:29,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 235 transitions. [2021-06-12 19:17:29,124 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 235 transitions. Word has length 14 [2021-06-12 19:17:29,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:17:29,125 INFO L482 AbstractCegarLoop]: Abstraction has 103 states and 235 transitions. [2021-06-12 19:17:29,125 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) [2021-06-12 19:17:29,125 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 235 transitions. [2021-06-12 19:17:29,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-12 19:17:29,126 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:17:29,126 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:17:29,126 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-12 19:17:29,126 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:17:29,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:17:29,126 INFO L82 PathProgramCache]: Analyzing trace with hash 1531630391, now seen corresponding path program 2 times [2021-06-12 19:17:29,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:17:29,127 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614890204] [2021-06-12 19:17:29,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:17:29,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:17:29,157 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:17:29,157 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:17:29,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614890204] [2021-06-12 19:17:29,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614890204] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 19:17:29,158 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 19:17:29,158 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-12 19:17:29,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758650164] [2021-06-12 19:17:29,159 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-12 19:17:29,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:17:29,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-12 19:17:29,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-12 19:17:29,160 INFO L87 Difference]: Start difference. First operand 103 states and 235 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) [2021-06-12 19:17:29,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:17:29,202 INFO L93 Difference]: Finished difference Result 144 states and 329 transitions. [2021-06-12 19:17:29,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-12 19:17:29,202 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 [2021-06-12 19:17:29,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:17:29,203 INFO L225 Difference]: With dead ends: 144 [2021-06-12 19:17:29,203 INFO L226 Difference]: Without dead ends: 139 [2021-06-12 19:17:29,203 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-12 19:17:29,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-06-12 19:17:29,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 103. [2021-06-12 19:17:29,209 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) [2021-06-12 19:17:29,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 233 transitions. [2021-06-12 19:17:29,210 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 233 transitions. Word has length 14 [2021-06-12 19:17:29,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:17:29,210 INFO L482 AbstractCegarLoop]: Abstraction has 103 states and 233 transitions. [2021-06-12 19:17:29,211 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) [2021-06-12 19:17:29,211 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 233 transitions. [2021-06-12 19:17:29,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:17:29,212 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:17:29,212 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:17:29,212 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-12 19:17:29,212 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:17:29,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:17:29,213 INFO L82 PathProgramCache]: Analyzing trace with hash -10930008, now seen corresponding path program 1 times [2021-06-12 19:17:29,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:17:29,213 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466516712] [2021-06-12 19:17:29,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:17:29,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:17:29,249 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:17:29,249 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:17:29,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466516712] [2021-06-12 19:17:29,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466516712] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:17:29,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645646142] [2021-06-12 19:17:29,250 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 [2021-06-12 19:17:29,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:17:29,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 19:17:29,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:17:29,362 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:17:29,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [645646142] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:17:29,362 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:17:29,362 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4] total 6 [2021-06-12 19:17:29,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623833078] [2021-06-12 19:17:29,363 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-12 19:17:29,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:17:29,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-12 19:17:29,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-12 19:17:29,363 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) [2021-06-12 19:17:29,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:17:29,449 INFO L93 Difference]: Finished difference Result 300 states and 674 transitions. [2021-06-12 19:17:29,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-12 19:17:29,450 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 [2021-06-12 19:17:29,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:17:29,452 INFO L225 Difference]: With dead ends: 300 [2021-06-12 19:17:29,452 INFO L226 Difference]: Without dead ends: 286 [2021-06-12 19:17:29,458 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 32.0ms TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-12 19:17:29,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2021-06-12 19:17:29,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 143. [2021-06-12 19:17:29,476 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) [2021-06-12 19:17:29,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 334 transitions. [2021-06-12 19:17:29,476 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 334 transitions. Word has length 17 [2021-06-12 19:17:29,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:17:29,477 INFO L482 AbstractCegarLoop]: Abstraction has 143 states and 334 transitions. [2021-06-12 19:17:29,477 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) [2021-06-12 19:17:29,477 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 334 transitions. [2021-06-12 19:17:29,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:17:29,478 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:17:29,478 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:17:29,696 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:17:29,697 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:17:29,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:17:29,697 INFO L82 PathProgramCache]: Analyzing trace with hash -1675583288, now seen corresponding path program 1 times [2021-06-12 19:17:29,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:17:29,698 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141821931] [2021-06-12 19:17:29,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:17:29,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:17:29,745 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:17:29,745 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:17:29,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141821931] [2021-06-12 19:17:29,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141821931] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:17:29,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090794851] [2021-06-12 19:17:29,746 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 [2021-06-12 19:17:29,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:17:29,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 19:17:29,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:17:29,854 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:17:29,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1090794851] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:17:29,854 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:17:29,855 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 6 [2021-06-12 19:17:29,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219753760] [2021-06-12 19:17:29,855 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-12 19:17:29,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:17:29,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-12 19:17:29,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-12 19:17:29,856 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) [2021-06-12 19:17:29,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:17:29,916 INFO L93 Difference]: Finished difference Result 248 states and 569 transitions. [2021-06-12 19:17:29,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-12 19:17:29,916 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 [2021-06-12 19:17:29,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:17:29,922 INFO L225 Difference]: With dead ends: 248 [2021-06-12 19:17:29,922 INFO L226 Difference]: Without dead ends: 248 [2021-06-12 19:17:29,922 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 36.1ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-12 19:17:29,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2021-06-12 19:17:29,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 194. [2021-06-12 19:17:29,942 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) [2021-06-12 19:17:29,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 468 transitions. [2021-06-12 19:17:29,943 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 468 transitions. Word has length 17 [2021-06-12 19:17:29,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:17:29,944 INFO L482 AbstractCegarLoop]: Abstraction has 194 states and 468 transitions. [2021-06-12 19:17:29,944 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) [2021-06-12 19:17:29,944 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 468 transitions. [2021-06-12 19:17:29,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:17:29,945 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:17:29,945 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:17:30,174 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:17:30,175 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:17:30,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:17:30,175 INFO L82 PathProgramCache]: Analyzing trace with hash -1837184638, now seen corresponding path program 2 times [2021-06-12 19:17:30,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:17:30,175 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880712444] [2021-06-12 19:17:30,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:17:30,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:17:30,233 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:17:30,234 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:17:30,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880712444] [2021-06-12 19:17:30,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880712444] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 19:17:30,234 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 19:17:30,234 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-12 19:17:30,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413402678] [2021-06-12 19:17:30,234 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-12 19:17:30,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:17:30,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-12 19:17:30,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-12 19:17:30,235 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) [2021-06-12 19:17:30,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:17:30,271 INFO L93 Difference]: Finished difference Result 311 states and 725 transitions. [2021-06-12 19:17:30,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-12 19:17:30,271 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 [2021-06-12 19:17:30,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:17:30,274 INFO L225 Difference]: With dead ends: 311 [2021-06-12 19:17:30,274 INFO L226 Difference]: Without dead ends: 304 [2021-06-12 19:17:30,274 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.6ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-12 19:17:30,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2021-06-12 19:17:30,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 252. [2021-06-12 19:17:30,282 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) [2021-06-12 19:17:30,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 620 transitions. [2021-06-12 19:17:30,283 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 620 transitions. Word has length 17 [2021-06-12 19:17:30,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:17:30,283 INFO L482 AbstractCegarLoop]: Abstraction has 252 states and 620 transitions. [2021-06-12 19:17:30,283 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) [2021-06-12 19:17:30,283 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 620 transitions. [2021-06-12 19:17:30,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:17:30,287 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:17:30,287 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:17:30,288 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-06-12 19:17:30,288 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:17:30,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:17:30,288 INFO L82 PathProgramCache]: Analyzing trace with hash -1678798648, now seen corresponding path program 1 times [2021-06-12 19:17:30,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:17:30,288 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928030725] [2021-06-12 19:17:30,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:17:30,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:17:30,327 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:17:30,328 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:17:30,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928030725] [2021-06-12 19:17:30,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928030725] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 19:17:30,328 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 19:17:30,328 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-12 19:17:30,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22798988] [2021-06-12 19:17:30,329 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-12 19:17:30,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:17:30,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-12 19:17:30,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-12 19:17:30,330 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) [2021-06-12 19:17:30,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:17:30,354 INFO L93 Difference]: Finished difference Result 243 states and 574 transitions. [2021-06-12 19:17:30,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-12 19:17:30,355 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 [2021-06-12 19:17:30,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:17:30,356 INFO L225 Difference]: With dead ends: 243 [2021-06-12 19:17:30,356 INFO L226 Difference]: Without dead ends: 208 [2021-06-12 19:17:30,356 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.0ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-12 19:17:30,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-06-12 19:17:30,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 208. [2021-06-12 19:17:30,361 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) [2021-06-12 19:17:30,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 497 transitions. [2021-06-12 19:17:30,362 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 497 transitions. Word has length 17 [2021-06-12 19:17:30,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:17:30,362 INFO L482 AbstractCegarLoop]: Abstraction has 208 states and 497 transitions. [2021-06-12 19:17:30,362 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) [2021-06-12 19:17:30,362 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 497 transitions. [2021-06-12 19:17:30,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-12 19:17:30,363 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:17:30,363 INFO L472 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:17:30,363 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-06-12 19:17:30,363 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:17:30,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:17:30,363 INFO L82 PathProgramCache]: Analyzing trace with hash 1963262152, now seen corresponding path program 2 times [2021-06-12 19:17:30,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:17:30,364 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155586231] [2021-06-12 19:17:30,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:17:30,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:17:30,391 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:17:30,392 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:17:30,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155586231] [2021-06-12 19:17:30,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155586231] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 19:17:30,392 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 19:17:30,392 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-12 19:17:30,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526549881] [2021-06-12 19:17:30,392 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 19:17:30,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:17:30,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 19:17:30,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-12 19:17:30,393 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) [2021-06-12 19:17:30,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:17:30,422 INFO L93 Difference]: Finished difference Result 222 states and 527 transitions. [2021-06-12 19:17:30,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 19:17:30,422 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 [2021-06-12 19:17:30,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:17:30,423 INFO L225 Difference]: With dead ends: 222 [2021-06-12 19:17:30,423 INFO L226 Difference]: Without dead ends: 222 [2021-06-12 19:17:30,424 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 14.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-12 19:17:30,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2021-06-12 19:17:30,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 222. [2021-06-12 19:17:30,428 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) [2021-06-12 19:17:30,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 527 transitions. [2021-06-12 19:17:30,429 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 527 transitions. Word has length 17 [2021-06-12 19:17:30,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:17:30,430 INFO L482 AbstractCegarLoop]: Abstraction has 222 states and 527 transitions. [2021-06-12 19:17:30,430 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) [2021-06-12 19:17:30,430 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 527 transitions. [2021-06-12 19:17:30,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:17:30,431 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:17:30,431 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:17:30,431 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-06-12 19:17:30,431 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:17:30,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:17:30,431 INFO L82 PathProgramCache]: Analyzing trace with hash 215291064, now seen corresponding path program 3 times [2021-06-12 19:17:30,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:17:30,432 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561830629] [2021-06-12 19:17:30,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:17:30,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:17:30,480 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:17:30,481 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:17:30,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561830629] [2021-06-12 19:17:30,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561830629] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:17:30,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300837300] [2021-06-12 19:17:30,481 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 [2021-06-12 19:17:30,518 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 19:17:30,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:17:30,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-12 19:17:30,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:17:30,741 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:17:30,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1300837300] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 19:17:30,741 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-12 19:17:30,742 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [5] total 12 [2021-06-12 19:17:30,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985098723] [2021-06-12 19:17:30,742 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 19:17:30,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:17:30,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 19:17:30,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:17:30,743 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) [2021-06-12 19:17:30,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:17:30,934 INFO L93 Difference]: Finished difference Result 421 states and 987 transitions. [2021-06-12 19:17:30,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:17:30,935 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 [2021-06-12 19:17:30,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:17:30,937 INFO L225 Difference]: With dead ends: 421 [2021-06-12 19:17:30,937 INFO L226 Difference]: Without dead ends: 414 [2021-06-12 19:17:30,937 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 219.0ms TimeCoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:17:30,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2021-06-12 19:17:30,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 278. [2021-06-12 19:17:30,945 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) [2021-06-12 19:17:30,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 669 transitions. [2021-06-12 19:17:30,946 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 669 transitions. Word has length 20 [2021-06-12 19:17:30,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:17:30,946 INFO L482 AbstractCegarLoop]: Abstraction has 278 states and 669 transitions. [2021-06-12 19:17:30,946 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) [2021-06-12 19:17:30,946 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 669 transitions. [2021-06-12 19:17:30,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:17:30,947 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:17:30,947 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:17:31,170 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:17:31,171 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:17:31,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:17:31,171 INFO L82 PathProgramCache]: Analyzing trace with hash -2043788104, now seen corresponding path program 4 times [2021-06-12 19:17:31,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:17:31,172 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942695745] [2021-06-12 19:17:31,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:17:31,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:17:31,226 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:17:31,226 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:17:31,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942695745] [2021-06-12 19:17:31,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942695745] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:17:31,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742694659] [2021-06-12 19:17:31,227 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 [2021-06-12 19:17:31,287 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:17:31,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:17:31,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-12 19:17:31,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:17:31,395 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:17:31,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [742694659] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 19:17:31,396 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-12 19:17:31,396 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 8 [2021-06-12 19:17:31,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772447161] [2021-06-12 19:17:31,396 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-12 19:17:31,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:17:31,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-12 19:17:31,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-06-12 19:17:31,397 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) [2021-06-12 19:17:31,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:17:31,520 INFO L93 Difference]: Finished difference Result 592 states and 1376 transitions. [2021-06-12 19:17:31,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 19:17:31,520 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 [2021-06-12 19:17:31,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:17:31,523 INFO L225 Difference]: With dead ends: 592 [2021-06-12 19:17:31,523 INFO L226 Difference]: Without dead ends: 592 [2021-06-12 19:17:31,524 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 82.6ms TimeCoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:17:31,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 592 states. [2021-06-12 19:17:31,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 592 to 376. [2021-06-12 19:17:31,534 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) [2021-06-12 19:17:31,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 953 transitions. [2021-06-12 19:17:31,536 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 953 transitions. Word has length 20 [2021-06-12 19:17:31,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:17:31,536 INFO L482 AbstractCegarLoop]: Abstraction has 376 states and 953 transitions. [2021-06-12 19:17:31,537 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) [2021-06-12 19:17:31,537 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 953 transitions. [2021-06-12 19:17:31,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:17:31,538 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:17:31,538 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:17:31,759 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-06-12 19:17:31,759 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:17:31,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:17:31,760 INFO L82 PathProgramCache]: Analyzing trace with hash -1610963566, now seen corresponding path program 5 times [2021-06-12 19:17:31,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:17:31,760 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933350354] [2021-06-12 19:17:31,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:17:31,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:17:31,809 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:17:31,809 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:17:31,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933350354] [2021-06-12 19:17:31,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933350354] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:17:31,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113087361] [2021-06-12 19:17:31,810 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 [2021-06-12 19:17:31,856 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 19:17:31,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:17:31,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 19:17:31,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:17:31,913 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:17:31,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113087361] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:17:31,914 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:17:31,914 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 6 [2021-06-12 19:17:31,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544643447] [2021-06-12 19:17:31,914 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-12 19:17:31,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:17:31,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-12 19:17:31,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-12 19:17:31,915 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) [2021-06-12 19:17:32,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:17:32,041 INFO L93 Difference]: Finished difference Result 751 states and 1816 transitions. [2021-06-12 19:17:32,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:17:32,041 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 [2021-06-12 19:17:32,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:17:32,045 INFO L225 Difference]: With dead ends: 751 [2021-06-12 19:17:32,045 INFO L226 Difference]: Without dead ends: 751 [2021-06-12 19:17:32,045 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 63.8ms TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:17:32,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 751 states. [2021-06-12 19:17:32,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 751 to 527. [2021-06-12 19:17:32,060 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) [2021-06-12 19:17:32,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 527 states to 527 states and 1399 transitions. [2021-06-12 19:17:32,063 INFO L78 Accepts]: Start accepts. Automaton has 527 states and 1399 transitions. Word has length 20 [2021-06-12 19:17:32,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:17:32,063 INFO L482 AbstractCegarLoop]: Abstraction has 527 states and 1399 transitions. [2021-06-12 19:17:32,063 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) [2021-06-12 19:17:32,063 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states and 1399 transitions. [2021-06-12 19:17:32,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:17:32,066 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:17:32,066 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:17:32,280 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:17:32,281 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:17:32,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:17:32,281 INFO L82 PathProgramCache]: Analyzing trace with hash 1876435461, now seen corresponding path program 6 times [2021-06-12 19:17:32,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:17:32,281 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363132384] [2021-06-12 19:17:32,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:17:32,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:17:32,331 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:17:32,331 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:17:32,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363132384] [2021-06-12 19:17:32,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1363132384] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:17:32,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948117000] [2021-06-12 19:17:32,332 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 [2021-06-12 19:17:32,369 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-12 19:17:32,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:17:32,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 19:17:32,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:17:32,416 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:17:32,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1948117000] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:17:32,416 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:17:32,416 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 5 [2021-06-12 19:17:32,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880993445] [2021-06-12 19:17:32,417 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-12 19:17:32,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:17:32,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-12 19:17:32,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-12 19:17:32,417 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) [2021-06-12 19:17:32,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:17:32,496 INFO L93 Difference]: Finished difference Result 960 states and 2485 transitions. [2021-06-12 19:17:32,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-12 19:17:32,496 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 [2021-06-12 19:17:32,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:17:32,501 INFO L225 Difference]: With dead ends: 960 [2021-06-12 19:17:32,501 INFO L226 Difference]: Without dead ends: 956 [2021-06-12 19:17:32,501 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 26.3ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-12 19:17:32,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 956 states. [2021-06-12 19:17:32,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 956 to 785. [2021-06-12 19:17:32,526 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) [2021-06-12 19:17:32,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 785 states to 785 states and 2158 transitions. [2021-06-12 19:17:32,529 INFO L78 Accepts]: Start accepts. Automaton has 785 states and 2158 transitions. Word has length 20 [2021-06-12 19:17:32,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:17:32,529 INFO L482 AbstractCegarLoop]: Abstraction has 785 states and 2158 transitions. [2021-06-12 19:17:32,529 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) [2021-06-12 19:17:32,529 INFO L276 IsEmpty]: Start isEmpty. Operand 785 states and 2158 transitions. [2021-06-12 19:17:32,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:17:32,532 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:17:32,532 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:17:32,744 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:17:32,745 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:17:32,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:17:32,745 INFO L82 PathProgramCache]: Analyzing trace with hash 1254555051, now seen corresponding path program 7 times [2021-06-12 19:17:32,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:17:32,745 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341396302] [2021-06-12 19:17:32,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:17:32,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:17:32,787 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:17:32,787 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:17:32,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341396302] [2021-06-12 19:17:32,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341396302] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:17:32,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657828261] [2021-06-12 19:17:32,788 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 [2021-06-12 19:17:32,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:17:32,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 19:17:32,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:17:32,871 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:17:32,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1657828261] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:17:32,872 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:17:32,872 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 5 [2021-06-12 19:17:32,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953075636] [2021-06-12 19:17:32,872 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-12 19:17:32,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:17:32,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-12 19:17:32,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-12 19:17:32,873 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) [2021-06-12 19:17:32,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:17:32,992 INFO L93 Difference]: Finished difference Result 966 states and 2482 transitions. [2021-06-12 19:17:32,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 19:17:32,993 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 [2021-06-12 19:17:32,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:17:32,997 INFO L225 Difference]: With dead ends: 966 [2021-06-12 19:17:32,997 INFO L226 Difference]: Without dead ends: 966 [2021-06-12 19:17:32,998 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 40.2ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-12 19:17:32,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 966 states. [2021-06-12 19:17:33,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 966 to 785. [2021-06-12 19:17:33,018 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) [2021-06-12 19:17:33,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 785 states to 785 states and 2148 transitions. [2021-06-12 19:17:33,021 INFO L78 Accepts]: Start accepts. Automaton has 785 states and 2148 transitions. Word has length 20 [2021-06-12 19:17:33,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:17:33,021 INFO L482 AbstractCegarLoop]: Abstraction has 785 states and 2148 transitions. [2021-06-12 19:17:33,021 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) [2021-06-12 19:17:33,021 INFO L276 IsEmpty]: Start isEmpty. Operand 785 states and 2148 transitions. [2021-06-12 19:17:33,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:17:33,023 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:17:33,023 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:17:33,244 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-06-12 19:17:33,245 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:17:33,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:17:33,245 INFO L82 PathProgramCache]: Analyzing trace with hash 322738604, now seen corresponding path program 8 times [2021-06-12 19:17:33,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:17:33,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533905192] [2021-06-12 19:17:33,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:17:33,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:17:33,277 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:17:33,277 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:17:33,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533905192] [2021-06-12 19:17:33,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533905192] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:17:33,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404202782] [2021-06-12 19:17:33,277 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 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 [2021-06-12 19:17:33,314 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:17:33,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:17:33,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 19:17:33,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:17:33,363 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:17:33,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1404202782] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:17:33,364 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:17:33,364 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-06-12 19:17:33,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061215877] [2021-06-12 19:17:33,366 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 19:17:33,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:17:33,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 19:17:33,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-12 19:17:33,366 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) [2021-06-12 19:17:33,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:17:33,432 INFO L93 Difference]: Finished difference Result 861 states and 2300 transitions. [2021-06-12 19:17:33,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 19:17:33,432 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 [2021-06-12 19:17:33,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:17:33,438 INFO L225 Difference]: With dead ends: 861 [2021-06-12 19:17:33,438 INFO L226 Difference]: Without dead ends: 858 [2021-06-12 19:17:33,439 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 25.8ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-12 19:17:33,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 858 states. [2021-06-12 19:17:33,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 858 to 781. [2021-06-12 19:17:33,464 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) [2021-06-12 19:17:33,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 781 states to 781 states and 2133 transitions. [2021-06-12 19:17:33,467 INFO L78 Accepts]: Start accepts. Automaton has 781 states and 2133 transitions. Word has length 20 [2021-06-12 19:17:33,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:17:33,467 INFO L482 AbstractCegarLoop]: Abstraction has 781 states and 2133 transitions. [2021-06-12 19:17:33,468 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) [2021-06-12 19:17:33,468 INFO L276 IsEmpty]: Start isEmpty. Operand 781 states and 2133 transitions. [2021-06-12 19:17:33,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:17:33,469 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:17:33,469 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:17:33,684 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:17:33,684 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:17:33,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:17:33,685 INFO L82 PathProgramCache]: Analyzing trace with hash -1057166664, now seen corresponding path program 9 times [2021-06-12 19:17:33,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:17:33,685 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940706900] [2021-06-12 19:17:33,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:17:33,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:17:33,727 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:17:33,727 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:17:33,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940706900] [2021-06-12 19:17:33,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940706900] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:17:33,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695472629] [2021-06-12 19:17:33,728 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-12 19:17:33,755 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 19:17:33,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:17:33,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 19:17:33,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:17:33,808 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:17:33,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1695472629] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:17:33,808 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:17:33,808 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-06-12 19:17:33,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078804025] [2021-06-12 19:17:33,809 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 19:17:33,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:17:33,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 19:17:33,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-12 19:17:33,810 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) [2021-06-12 19:17:33,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:17:33,891 INFO L93 Difference]: Finished difference Result 1114 states and 2914 transitions. [2021-06-12 19:17:33,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-12 19:17:33,891 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 [2021-06-12 19:17:33,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:17:33,896 INFO L225 Difference]: With dead ends: 1114 [2021-06-12 19:17:33,896 INFO L226 Difference]: Without dead ends: 1114 [2021-06-12 19:17:33,897 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 36.0ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-12 19:17:33,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1114 states. [2021-06-12 19:17:33,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1114 to 899. [2021-06-12 19:17:33,918 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) [2021-06-12 19:17:33,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 899 states to 899 states and 2489 transitions. [2021-06-12 19:17:33,921 INFO L78 Accepts]: Start accepts. Automaton has 899 states and 2489 transitions. Word has length 20 [2021-06-12 19:17:33,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:17:33,921 INFO L482 AbstractCegarLoop]: Abstraction has 899 states and 2489 transitions. [2021-06-12 19:17:33,921 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) [2021-06-12 19:17:33,921 INFO L276 IsEmpty]: Start isEmpty. Operand 899 states and 2489 transitions. [2021-06-12 19:17:33,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:17:33,923 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:17:33,923 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:17:34,143 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-06-12 19:17:34,143 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:17:34,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:17:34,143 INFO L82 PathProgramCache]: Analyzing trace with hash -1634542869, now seen corresponding path program 10 times [2021-06-12 19:17:34,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:17:34,144 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014019569] [2021-06-12 19:17:34,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:17:34,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:17:34,172 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:17:34,172 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:17:34,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014019569] [2021-06-12 19:17:34,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014019569] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:17:34,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681933251] [2021-06-12 19:17:34,172 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 [2021-06-12 19:17:34,194 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:17:34,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:17:34,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 19:17:34,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:17:34,251 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:17:34,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1681933251] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:17:34,251 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:17:34,251 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 5 [2021-06-12 19:17:34,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235987385] [2021-06-12 19:17:34,251 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-12 19:17:34,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:17:34,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-12 19:17:34,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-12 19:17:34,252 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) [2021-06-12 19:17:34,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:17:34,355 INFO L93 Difference]: Finished difference Result 1380 states and 3776 transitions. [2021-06-12 19:17:34,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-12 19:17:34,356 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 [2021-06-12 19:17:34,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:17:34,361 INFO L225 Difference]: With dead ends: 1380 [2021-06-12 19:17:34,361 INFO L226 Difference]: Without dead ends: 1370 [2021-06-12 19:17:34,362 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 39.0ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-06-12 19:17:34,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1370 states. [2021-06-12 19:17:34,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1370 to 1228. [2021-06-12 19:17:34,389 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) [2021-06-12 19:17:34,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1228 states to 1228 states and 3466 transitions. [2021-06-12 19:17:34,393 INFO L78 Accepts]: Start accepts. Automaton has 1228 states and 3466 transitions. Word has length 20 [2021-06-12 19:17:34,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:17:34,393 INFO L482 AbstractCegarLoop]: Abstraction has 1228 states and 3466 transitions. [2021-06-12 19:17:34,393 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) [2021-06-12 19:17:34,394 INFO L276 IsEmpty]: Start isEmpty. Operand 1228 states and 3466 transitions. [2021-06-12 19:17:34,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:17:34,395 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:17:34,395 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:17:34,612 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-06-12 19:17:34,613 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:17:34,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:17:34,613 INFO L82 PathProgramCache]: Analyzing trace with hash 2038544017, now seen corresponding path program 11 times [2021-06-12 19:17:34,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:17:34,613 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224057266] [2021-06-12 19:17:34,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:17:34,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:17:34,643 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:17:34,643 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:17:34,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224057266] [2021-06-12 19:17:34,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224057266] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:17:34,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909736797] [2021-06-12 19:17:34,644 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 [2021-06-12 19:17:34,686 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-12 19:17:34,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:17:34,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 19:17:34,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:17:34,728 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:17:34,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909736797] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:17:34,729 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:17:34,729 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 5 [2021-06-12 19:17:34,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538298448] [2021-06-12 19:17:34,729 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-12 19:17:34,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:17:34,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-12 19:17:34,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-12 19:17:34,730 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) [2021-06-12 19:17:34,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:17:34,834 INFO L93 Difference]: Finished difference Result 1400 states and 3809 transitions. [2021-06-12 19:17:34,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 19:17:34,835 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 [2021-06-12 19:17:34,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:17:34,841 INFO L225 Difference]: With dead ends: 1400 [2021-06-12 19:17:34,841 INFO L226 Difference]: Without dead ends: 1400 [2021-06-12 19:17:34,841 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 50.5ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-06-12 19:17:34,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1400 states. [2021-06-12 19:17:34,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1400 to 1248. [2021-06-12 19:17:34,866 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) [2021-06-12 19:17:34,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1248 states to 1248 states and 3510 transitions. [2021-06-12 19:17:34,871 INFO L78 Accepts]: Start accepts. Automaton has 1248 states and 3510 transitions. Word has length 20 [2021-06-12 19:17:34,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:17:34,871 INFO L482 AbstractCegarLoop]: Abstraction has 1248 states and 3510 transitions. [2021-06-12 19:17:34,871 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) [2021-06-12 19:17:34,871 INFO L276 IsEmpty]: Start isEmpty. Operand 1248 states and 3510 transitions. [2021-06-12 19:17:34,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:17:34,873 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:17:34,873 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:17:35,097 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-06-12 19:17:35,097 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:17:35,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:17:35,098 INFO L82 PathProgramCache]: Analyzing trace with hash 1106727570, now seen corresponding path program 12 times [2021-06-12 19:17:35,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:17:35,098 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957409288] [2021-06-12 19:17:35,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:17:35,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:17:35,128 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:17:35,128 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:17:35,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957409288] [2021-06-12 19:17:35,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957409288] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:17:35,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784756385] [2021-06-12 19:17:35,128 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 [2021-06-12 19:17:35,150 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-12 19:17:35,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:17:35,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 19:17:35,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:17:35,201 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:17:35,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1784756385] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:17:35,202 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:17:35,202 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-06-12 19:17:35,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587674053] [2021-06-12 19:17:35,202 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 19:17:35,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:17:35,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 19:17:35,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-12 19:17:35,203 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) [2021-06-12 19:17:35,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:17:35,264 INFO L93 Difference]: Finished difference Result 1485 states and 3980 transitions. [2021-06-12 19:17:35,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 19:17:35,264 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 [2021-06-12 19:17:35,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:17:35,270 INFO L225 Difference]: With dead ends: 1485 [2021-06-12 19:17:35,270 INFO L226 Difference]: Without dead ends: 1482 [2021-06-12 19:17:35,271 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 21.6ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-06-12 19:17:35,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1482 states. [2021-06-12 19:17:35,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1482 to 1250. [2021-06-12 19:17:35,298 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) [2021-06-12 19:17:35,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1250 states to 1250 states and 3508 transitions. [2021-06-12 19:17:35,302 INFO L78 Accepts]: Start accepts. Automaton has 1250 states and 3508 transitions. Word has length 20 [2021-06-12 19:17:35,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:17:35,302 INFO L482 AbstractCegarLoop]: Abstraction has 1250 states and 3508 transitions. [2021-06-12 19:17:35,303 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) [2021-06-12 19:17:35,303 INFO L276 IsEmpty]: Start isEmpty. Operand 1250 states and 3508 transitions. [2021-06-12 19:17:35,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:17:35,305 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:17:35,305 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:17:35,528 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:17:35,528 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:17:35,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:17:35,528 INFO L82 PathProgramCache]: Analyzing trace with hash 400971561, now seen corresponding path program 13 times [2021-06-12 19:17:35,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:17:35,528 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235433464] [2021-06-12 19:17:35,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:17:35,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:17:35,581 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:17:35,581 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:17:35,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235433464] [2021-06-12 19:17:35,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [235433464] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:17:35,581 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660675345] [2021-06-12 19:17:35,581 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 [2021-06-12 19:17:35,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:17:35,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 19:17:35,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:17:35,661 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:17:35,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [660675345] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:17:35,661 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:17:35,661 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 6 [2021-06-12 19:17:35,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777361291] [2021-06-12 19:17:35,661 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-12 19:17:35,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:17:35,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-12 19:17:35,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-12 19:17:35,662 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) [2021-06-12 19:17:35,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:17:35,785 INFO L93 Difference]: Finished difference Result 1426 states and 3852 transitions. [2021-06-12 19:17:35,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:17:35,786 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 [2021-06-12 19:17:35,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:17:35,791 INFO L225 Difference]: With dead ends: 1426 [2021-06-12 19:17:35,791 INFO L226 Difference]: Without dead ends: 1426 [2021-06-12 19:17:35,792 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 58.5ms TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:17:35,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1426 states. [2021-06-12 19:17:35,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1426 to 1193. [2021-06-12 19:17:35,825 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) [2021-06-12 19:17:35,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1193 states to 1193 states and 3338 transitions. [2021-06-12 19:17:35,828 INFO L78 Accepts]: Start accepts. Automaton has 1193 states and 3338 transitions. Word has length 20 [2021-06-12 19:17:35,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:17:35,829 INFO L482 AbstractCegarLoop]: Abstraction has 1193 states and 3338 transitions. [2021-06-12 19:17:35,829 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) [2021-06-12 19:17:35,829 INFO L276 IsEmpty]: Start isEmpty. Operand 1193 states and 3338 transitions. [2021-06-12 19:17:35,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-12 19:17:35,830 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:17:35,831 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:17:36,044 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:17:36,045 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:17:36,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:17:36,045 INFO L82 PathProgramCache]: Analyzing trace with hash 1313790136, now seen corresponding path program 14 times [2021-06-12 19:17:36,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:17:36,045 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655568490] [2021-06-12 19:17:36,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:17:36,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:17:36,079 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:17:36,079 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:17:36,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655568490] [2021-06-12 19:17:36,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655568490] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:17:36,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213240713] [2021-06-12 19:17:36,079 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-12 19:17:36,106 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:17:36,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:17:36,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-12 19:17:36,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:17:36,157 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:17:36,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1213240713] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:17:36,157 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:17:36,157 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-12 19:17:36,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565399842] [2021-06-12 19:17:36,157 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-12 19:17:36,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:17:36,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-12 19:17:36,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-12 19:17:36,158 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) [2021-06-12 19:17:36,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:17:36,239 INFO L93 Difference]: Finished difference Result 1396 states and 3748 transitions. [2021-06-12 19:17:36,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-12 19:17:36,239 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 [2021-06-12 19:17:36,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:17:36,245 INFO L225 Difference]: With dead ends: 1396 [2021-06-12 19:17:36,245 INFO L226 Difference]: Without dead ends: 1382 [2021-06-12 19:17:36,245 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 37.2ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-12 19:17:36,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1382 states. [2021-06-12 19:17:36,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1382 to 1217. [2021-06-12 19:17:36,267 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) [2021-06-12 19:17:36,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1217 states to 1217 states and 3378 transitions. [2021-06-12 19:17:36,270 INFO L78 Accepts]: Start accepts. Automaton has 1217 states and 3378 transitions. Word has length 20 [2021-06-12 19:17:36,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:17:36,270 INFO L482 AbstractCegarLoop]: Abstraction has 1217 states and 3378 transitions. [2021-06-12 19:17:36,270 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) [2021-06-12 19:17:36,270 INFO L276 IsEmpty]: Start isEmpty. Operand 1217 states and 3378 transitions. [2021-06-12 19:17:36,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 19:17:36,272 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:17:36,272 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:17:36,492 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-06-12 19:17:36,493 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:17:36,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:17:36,493 INFO L82 PathProgramCache]: Analyzing trace with hash -1149983723, now seen corresponding path program 1 times [2021-06-12 19:17:36,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:17:36,493 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640399233] [2021-06-12 19:17:36,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:17:36,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:17:36,540 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:17:36,540 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:17:36,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640399233] [2021-06-12 19:17:36,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640399233] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:17:36,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626284676] [2021-06-12 19:17:36,540 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 [2021-06-12 19:17:36,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:17:36,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-12 19:17:36,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:17:36,653 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:17:36,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1626284676] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:17:36,654 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:17:36,654 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-06-12 19:17:36,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885096638] [2021-06-12 19:17:36,654 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:17:36,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:17:36,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:17:36,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:17:36,655 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) [2021-06-12 19:17:37,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:17:37,027 INFO L93 Difference]: Finished difference Result 1620 states and 4189 transitions. [2021-06-12 19:17:37,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 19:17:37,027 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 [2021-06-12 19:17:37,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:17:37,034 INFO L225 Difference]: With dead ends: 1620 [2021-06-12 19:17:37,034 INFO L226 Difference]: Without dead ends: 1620 [2021-06-12 19:17:37,034 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 211.5ms TimeCoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:17:37,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1620 states. [2021-06-12 19:17:37,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1620 to 1363. [2021-06-12 19:17:37,060 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) [2021-06-12 19:17:37,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1363 states to 1363 states and 3665 transitions. [2021-06-12 19:17:37,064 INFO L78 Accepts]: Start accepts. Automaton has 1363 states and 3665 transitions. Word has length 23 [2021-06-12 19:17:37,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:17:37,064 INFO L482 AbstractCegarLoop]: Abstraction has 1363 states and 3665 transitions. [2021-06-12 19:17:37,064 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) [2021-06-12 19:17:37,064 INFO L276 IsEmpty]: Start isEmpty. Operand 1363 states and 3665 transitions. [2021-06-12 19:17:37,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 19:17:37,066 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:17:37,067 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:17:37,290 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:17:37,291 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:17:37,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:17:37,291 INFO L82 PathProgramCache]: Analyzing trace with hash -1870263307, now seen corresponding path program 15 times [2021-06-12 19:17:37,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:17:37,291 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [643348640] [2021-06-12 19:17:37,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:17:37,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:17:37,325 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:17:37,326 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:17:37,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [643348640] [2021-06-12 19:17:37,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [643348640] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:17:37,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512358074] [2021-06-12 19:17:37,326 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 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 [2021-06-12 19:17:37,356 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 19:17:37,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:17:37,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-12 19:17:37,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:17:37,406 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:17:37,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512358074] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:17:37,407 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:17:37,407 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-06-12 19:17:37,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433338919] [2021-06-12 19:17:37,407 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 19:17:37,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:17:37,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 19:17:37,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-12 19:17:37,408 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) [2021-06-12 19:17:37,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:17:37,484 INFO L93 Difference]: Finished difference Result 1903 states and 5027 transitions. [2021-06-12 19:17:37,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 19:17:37,485 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 [2021-06-12 19:17:37,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:17:37,507 INFO L225 Difference]: With dead ends: 1903 [2021-06-12 19:17:37,507 INFO L226 Difference]: Without dead ends: 1896 [2021-06-12 19:17:37,507 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.1ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-12 19:17:37,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1896 states. [2021-06-12 19:17:37,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1896 to 1797. [2021-06-12 19:17:37,543 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) [2021-06-12 19:17:37,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1797 states to 1797 states and 4837 transitions. [2021-06-12 19:17:37,547 INFO L78 Accepts]: Start accepts. Automaton has 1797 states and 4837 transitions. Word has length 23 [2021-06-12 19:17:37,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:17:37,547 INFO L482 AbstractCegarLoop]: Abstraction has 1797 states and 4837 transitions. [2021-06-12 19:17:37,547 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) [2021-06-12 19:17:37,547 INFO L276 IsEmpty]: Start isEmpty. Operand 1797 states and 4837 transitions. [2021-06-12 19:17:37,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 19:17:37,549 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:17:37,549 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:17:37,764 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-06-12 19:17:37,765 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:17:37,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:17:37,765 INFO L82 PathProgramCache]: Analyzing trace with hash -877014541, now seen corresponding path program 16 times [2021-06-12 19:17:37,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:17:37,765 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755394529] [2021-06-12 19:17:37,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:17:37,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:17:37,810 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-12 19:17:37,811 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:17:37,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755394529] [2021-06-12 19:17:37,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755394529] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:17:37,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323971010] [2021-06-12 19:17:37,811 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 [2021-06-12 19:17:37,834 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:17:37,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:17:37,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-12 19:17:37,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:17:37,886 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-12 19:17:37,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [323971010] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:17:37,886 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:17:37,887 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-06-12 19:17:37,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112532513] [2021-06-12 19:17:37,888 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 19:17:37,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:17:37,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 19:17:37,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-12 19:17:37,888 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) [2021-06-12 19:17:37,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:17:37,978 INFO L93 Difference]: Finished difference Result 2099 states and 5565 transitions. [2021-06-12 19:17:37,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 19:17:37,979 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 [2021-06-12 19:17:37,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:17:37,984 INFO L225 Difference]: With dead ends: 2099 [2021-06-12 19:17:37,985 INFO L226 Difference]: Without dead ends: 2092 [2021-06-12 19:17:37,985 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.0ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-12 19:17:37,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2092 states. [2021-06-12 19:17:38,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2092 to 1863. [2021-06-12 19:17:38,040 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) [2021-06-12 19:17:38,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1863 states to 1863 states and 5029 transitions. [2021-06-12 19:17:38,046 INFO L78 Accepts]: Start accepts. Automaton has 1863 states and 5029 transitions. Word has length 23 [2021-06-12 19:17:38,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:17:38,047 INFO L482 AbstractCegarLoop]: Abstraction has 1863 states and 5029 transitions. [2021-06-12 19:17:38,048 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) [2021-06-12 19:17:38,048 INFO L276 IsEmpty]: Start isEmpty. Operand 1863 states and 5029 transitions. [2021-06-12 19:17:38,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 19:17:38,051 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:17:38,051 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:17:38,264 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-06-12 19:17:38,265 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:17:38,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:17:38,265 INFO L82 PathProgramCache]: Analyzing trace with hash 1516662741, now seen corresponding path program 1 times [2021-06-12 19:17:38,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:17:38,265 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900046004] [2021-06-12 19:17:38,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:17:38,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:17:38,342 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:17:38,342 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:17:38,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900046004] [2021-06-12 19:17:38,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900046004] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:17:38,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050576393] [2021-06-12 19:17:38,343 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 [2021-06-12 19:17:38,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:17:38,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-12 19:17:38,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:17:38,441 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:17:38,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2050576393] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:17:38,441 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:17:38,442 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-06-12 19:17:38,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390331856] [2021-06-12 19:17:38,442 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 19:17:38,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:17:38,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 19:17:38,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:17:38,443 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) [2021-06-12 19:17:38,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:17:38,595 INFO L93 Difference]: Finished difference Result 1530 states and 4049 transitions. [2021-06-12 19:17:38,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:17:38,595 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 [2021-06-12 19:17:38,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:17:38,598 INFO L225 Difference]: With dead ends: 1530 [2021-06-12 19:17:38,598 INFO L226 Difference]: Without dead ends: 1391 [2021-06-12 19:17:38,598 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 102.2ms TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:17:38,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1391 states. [2021-06-12 19:17:38,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1391 to 1357. [2021-06-12 19:17:38,618 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) [2021-06-12 19:17:38,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1357 states to 1357 states and 3676 transitions. [2021-06-12 19:17:38,622 INFO L78 Accepts]: Start accepts. Automaton has 1357 states and 3676 transitions. Word has length 23 [2021-06-12 19:17:38,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:17:38,622 INFO L482 AbstractCegarLoop]: Abstraction has 1357 states and 3676 transitions. [2021-06-12 19:17:38,622 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) [2021-06-12 19:17:38,622 INFO L276 IsEmpty]: Start isEmpty. Operand 1357 states and 3676 transitions. [2021-06-12 19:17:38,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 19:17:38,624 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:17:38,624 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:17:38,838 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-06-12 19:17:38,839 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:17:38,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:17:38,839 INFO L82 PathProgramCache]: Analyzing trace with hash 2072587809, now seen corresponding path program 2 times [2021-06-12 19:17:38,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:17:38,839 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837918304] [2021-06-12 19:17:38,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:17:38,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:17:38,891 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:17:38,891 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:17:38,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837918304] [2021-06-12 19:17:38,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837918304] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:17:38,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494006201] [2021-06-12 19:17:38,892 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 [2021-06-12 19:17:38,923 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:17:38,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:17:38,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-12 19:17:38,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:17:38,998 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:17:38,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [494006201] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:17:38,999 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:17:38,999 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-06-12 19:17:38,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736669917] [2021-06-12 19:17:38,999 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 19:17:38,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:17:39,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 19:17:39,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:17:39,000 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) [2021-06-12 19:17:39,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:17:39,188 INFO L93 Difference]: Finished difference Result 1538 states and 4021 transitions. [2021-06-12 19:17:39,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:17:39,188 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 [2021-06-12 19:17:39,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:17:39,191 INFO L225 Difference]: With dead ends: 1538 [2021-06-12 19:17:39,191 INFO L226 Difference]: Without dead ends: 1538 [2021-06-12 19:17:39,192 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 129.8ms TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:17:39,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1538 states. [2021-06-12 19:17:39,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1538 to 1383. [2021-06-12 19:17:39,215 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) [2021-06-12 19:17:39,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1383 states to 1383 states and 3736 transitions. [2021-06-12 19:17:39,219 INFO L78 Accepts]: Start accepts. Automaton has 1383 states and 3736 transitions. Word has length 23 [2021-06-12 19:17:39,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:17:39,219 INFO L482 AbstractCegarLoop]: Abstraction has 1383 states and 3736 transitions. [2021-06-12 19:17:39,219 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) [2021-06-12 19:17:39,219 INFO L276 IsEmpty]: Start isEmpty. Operand 1383 states and 3736 transitions. [2021-06-12 19:17:39,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 19:17:39,221 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:17:39,221 INFO L472 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:17:39,436 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-06-12 19:17:39,437 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:17:39,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:17:39,437 INFO L82 PathProgramCache]: Analyzing trace with hash 1575503784, now seen corresponding path program 2 times [2021-06-12 19:17:39,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:17:39,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692320401] [2021-06-12 19:17:39,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:17:39,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:17:39,479 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:17:39,479 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:17:39,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692320401] [2021-06-12 19:17:39,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692320401] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:17:39,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712316708] [2021-06-12 19:17:39,480 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 [2021-06-12 19:17:39,507 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:17:39,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:17:39,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-12 19:17:39,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:17:39,557 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:17:39,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1712316708] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:17:39,558 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:17:39,558 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 7 [2021-06-12 19:17:39,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271492505] [2021-06-12 19:17:39,558 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 19:17:39,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:17:39,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 19:17:39,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-06-12 19:17:39,559 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) [2021-06-12 19:17:39,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:17:39,658 INFO L93 Difference]: Finished difference Result 1546 states and 4028 transitions. [2021-06-12 19:17:39,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-12 19:17:39,658 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 [2021-06-12 19:17:39,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:17:39,662 INFO L225 Difference]: With dead ends: 1546 [2021-06-12 19:17:39,662 INFO L226 Difference]: Without dead ends: 1526 [2021-06-12 19:17:39,662 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 52.6ms TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:17:39,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1526 states. [2021-06-12 19:17:39,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1526 to 1395. [2021-06-12 19:17:39,684 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) [2021-06-12 19:17:39,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1395 states to 1395 states and 3748 transitions. [2021-06-12 19:17:39,688 INFO L78 Accepts]: Start accepts. Automaton has 1395 states and 3748 transitions. Word has length 23 [2021-06-12 19:17:39,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:17:39,688 INFO L482 AbstractCegarLoop]: Abstraction has 1395 states and 3748 transitions. [2021-06-12 19:17:39,688 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) [2021-06-12 19:17:39,688 INFO L276 IsEmpty]: Start isEmpty. Operand 1395 states and 3748 transitions. [2021-06-12 19:17:39,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 19:17:39,691 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:17:39,691 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:17:39,904 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:17:39,905 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:17:39,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:17:39,905 INFO L82 PathProgramCache]: Analyzing trace with hash -1556804075, now seen corresponding path program 3 times [2021-06-12 19:17:39,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:17:39,905 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016657526] [2021-06-12 19:17:39,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:17:39,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:17:39,955 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:17:39,955 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:17:39,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016657526] [2021-06-12 19:17:39,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016657526] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:17:39,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890150963] [2021-06-12 19:17:39,956 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 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 [2021-06-12 19:17:39,991 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 19:17:39,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:17:39,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-12 19:17:39,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:17:40,070 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:17:40,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [890150963] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:17:40,071 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:17:40,071 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-06-12 19:17:40,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558367059] [2021-06-12 19:17:40,071 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 19:17:40,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:17:40,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 19:17:40,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:17:40,072 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) [2021-06-12 19:17:40,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:17:40,307 INFO L93 Difference]: Finished difference Result 1913 states and 4928 transitions. [2021-06-12 19:17:40,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:17:40,308 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 [2021-06-12 19:17:40,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:17:40,312 INFO L225 Difference]: With dead ends: 1913 [2021-06-12 19:17:40,312 INFO L226 Difference]: Without dead ends: 1913 [2021-06-12 19:17:40,312 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 88.6ms TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:17:40,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1913 states. [2021-06-12 19:17:40,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1913 to 1544. [2021-06-12 19:17:40,334 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) [2021-06-12 19:17:40,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1544 states to 1544 states and 4139 transitions. [2021-06-12 19:17:40,338 INFO L78 Accepts]: Start accepts. Automaton has 1544 states and 4139 transitions. Word has length 23 [2021-06-12 19:17:40,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:17:40,339 INFO L482 AbstractCegarLoop]: Abstraction has 1544 states and 4139 transitions. [2021-06-12 19:17:40,339 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) [2021-06-12 19:17:40,339 INFO L276 IsEmpty]: Start isEmpty. Operand 1544 states and 4139 transitions. [2021-06-12 19:17:40,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 19:17:40,341 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:17:40,341 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:17:40,560 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:17:40,561 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:17:40,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:17:40,561 INFO L82 PathProgramCache]: Analyzing trace with hash -56471083, now seen corresponding path program 3 times [2021-06-12 19:17:40,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:17:40,561 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494189440] [2021-06-12 19:17:40,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:17:40,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:17:40,631 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:17:40,631 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:17:40,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494189440] [2021-06-12 19:17:40,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494189440] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 19:17:40,631 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 19:17:40,631 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-12 19:17:40,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090206380] [2021-06-12 19:17:40,631 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-12 19:17:40,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:17:40,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-12 19:17:40,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-12 19:17:40,632 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) [2021-06-12 19:17:40,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:17:40,687 INFO L93 Difference]: Finished difference Result 1492 states and 3879 transitions. [2021-06-12 19:17:40,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-12 19:17:40,687 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 [2021-06-12 19:17:40,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:17:40,690 INFO L225 Difference]: With dead ends: 1492 [2021-06-12 19:17:40,690 INFO L226 Difference]: Without dead ends: 1411 [2021-06-12 19:17:40,691 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 32.2ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-06-12 19:17:40,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1411 states. [2021-06-12 19:17:40,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1411 to 1381. [2021-06-12 19:17:40,712 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) [2021-06-12 19:17:40,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1381 states to 1381 states and 3620 transitions. [2021-06-12 19:17:40,715 INFO L78 Accepts]: Start accepts. Automaton has 1381 states and 3620 transitions. Word has length 23 [2021-06-12 19:17:40,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:17:40,715 INFO L482 AbstractCegarLoop]: Abstraction has 1381 states and 3620 transitions. [2021-06-12 19:17:40,715 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) [2021-06-12 19:17:40,716 INFO L276 IsEmpty]: Start isEmpty. Operand 1381 states and 3620 transitions. [2021-06-12 19:17:40,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 19:17:40,717 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:17:40,718 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:17:40,718 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2021-06-12 19:17:40,718 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:17:40,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:17:40,718 INFO L82 PathProgramCache]: Analyzing trace with hash -670007263, now seen corresponding path program 4 times [2021-06-12 19:17:40,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:17:40,718 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174601062] [2021-06-12 19:17:40,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:17:40,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:17:40,765 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:17:40,765 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:17:40,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174601062] [2021-06-12 19:17:40,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174601062] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:17:40,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103655532] [2021-06-12 19:17:40,765 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 [2021-06-12 19:17:40,795 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:17:40,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:17:40,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-12 19:17:40,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:17:40,863 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:17:40,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1103655532] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:17:40,863 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:17:40,863 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-06-12 19:17:40,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044545177] [2021-06-12 19:17:40,864 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 19:17:40,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:17:40,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 19:17:40,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:17:40,864 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) [2021-06-12 19:17:41,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:17:41,066 INFO L93 Difference]: Finished difference Result 1624 states and 4116 transitions. [2021-06-12 19:17:41,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:17:41,066 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 [2021-06-12 19:17:41,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:17:41,070 INFO L225 Difference]: With dead ends: 1624 [2021-06-12 19:17:41,070 INFO L226 Difference]: Without dead ends: 1612 [2021-06-12 19:17:41,070 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 104.4ms TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:17:41,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1612 states. [2021-06-12 19:17:41,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1612 to 1413. [2021-06-12 19:17:41,104 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) [2021-06-12 19:17:41,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1413 states to 1413 states and 3700 transitions. [2021-06-12 19:17:41,108 INFO L78 Accepts]: Start accepts. Automaton has 1413 states and 3700 transitions. Word has length 23 [2021-06-12 19:17:41,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:17:41,109 INFO L482 AbstractCegarLoop]: Abstraction has 1413 states and 3700 transitions. [2021-06-12 19:17:41,109 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) [2021-06-12 19:17:41,109 INFO L276 IsEmpty]: Start isEmpty. Operand 1413 states and 3700 transitions. [2021-06-12 19:17:41,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 19:17:41,111 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:17:41,111 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:17:41,335 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-06-12 19:17:41,335 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:17:41,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:17:41,335 INFO L82 PathProgramCache]: Analyzing trace with hash -819089257, now seen corresponding path program 17 times [2021-06-12 19:17:41,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:17:41,335 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587215493] [2021-06-12 19:17:41,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:17:41,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:17:41,385 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:17:41,385 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:17:41,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587215493] [2021-06-12 19:17:41,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587215493] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:17:41,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288864443] [2021-06-12 19:17:41,385 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 [2021-06-12 19:17:41,408 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 19:17:41,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:17:41,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-12 19:17:41,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:17:41,533 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:17:41,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [288864443] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:17:41,533 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:17:41,533 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 9] total 11 [2021-06-12 19:17:41,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333211276] [2021-06-12 19:17:41,534 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 19:17:41,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:17:41,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 19:17:41,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:17:41,534 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) [2021-06-12 19:17:42,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:17:42,061 INFO L93 Difference]: Finished difference Result 2940 states and 7390 transitions. [2021-06-12 19:17:42,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 19:17:42,062 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 [2021-06-12 19:17:42,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:17:42,069 INFO L225 Difference]: With dead ends: 2940 [2021-06-12 19:17:42,069 INFO L226 Difference]: Without dead ends: 2926 [2021-06-12 19:17:42,070 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 264.2ms TimeCoverageRelationStatistics Valid=161, Invalid=439, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:17:42,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2926 states. [2021-06-12 19:17:42,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2926 to 1583. [2021-06-12 19:17:42,137 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) [2021-06-12 19:17:42,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1583 states to 1583 states and 4142 transitions. [2021-06-12 19:17:42,141 INFO L78 Accepts]: Start accepts. Automaton has 1583 states and 4142 transitions. Word has length 23 [2021-06-12 19:17:42,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:17:42,141 INFO L482 AbstractCegarLoop]: Abstraction has 1583 states and 4142 transitions. [2021-06-12 19:17:42,141 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) [2021-06-12 19:17:42,142 INFO L276 IsEmpty]: Start isEmpty. Operand 1583 states and 4142 transitions. [2021-06-12 19:17:42,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 19:17:42,144 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:17:42,144 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:17:42,366 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:17:42,366 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:17:42,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:17:42,366 INFO L82 PathProgramCache]: Analyzing trace with hash 1471910071, now seen corresponding path program 5 times [2021-06-12 19:17:42,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:17:42,367 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26738925] [2021-06-12 19:17:42,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:17:42,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:17:42,415 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:17:42,415 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:17:42,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26738925] [2021-06-12 19:17:42,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26738925] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:17:42,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063092601] [2021-06-12 19:17:42,415 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 [2021-06-12 19:17:42,452 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 19:17:42,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:17:42,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-12 19:17:42,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:17:42,546 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:17:42,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2063092601] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:17:42,546 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:17:42,546 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-06-12 19:17:42,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027305209] [2021-06-12 19:17:42,546 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:17:42,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:17:42,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:17:42,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:17:42,548 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) [2021-06-12 19:17:42,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:17:42,844 INFO L93 Difference]: Finished difference Result 1758 states and 4409 transitions. [2021-06-12 19:17:42,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 19:17:42,846 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 [2021-06-12 19:17:42,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:17:42,848 INFO L225 Difference]: With dead ends: 1758 [2021-06-12 19:17:42,848 INFO L226 Difference]: Without dead ends: 1746 [2021-06-12 19:17:42,848 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 178.7ms TimeCoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:17:42,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1746 states. [2021-06-12 19:17:42,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1746 to 1437. [2021-06-12 19:17:42,870 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) [2021-06-12 19:17:42,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1437 states to 1437 states and 3730 transitions. [2021-06-12 19:17:42,873 INFO L78 Accepts]: Start accepts. Automaton has 1437 states and 3730 transitions. Word has length 23 [2021-06-12 19:17:42,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:17:42,873 INFO L482 AbstractCegarLoop]: Abstraction has 1437 states and 3730 transitions. [2021-06-12 19:17:42,873 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) [2021-06-12 19:17:42,873 INFO L276 IsEmpty]: Start isEmpty. Operand 1437 states and 3730 transitions. [2021-06-12 19:17:42,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-12 19:17:42,875 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:17:42,875 INFO L472 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:17:43,092 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2021-06-12 19:17:43,093 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:17:43,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:17:43,093 INFO L82 PathProgramCache]: Analyzing trace with hash -1618050889, now seen corresponding path program 4 times [2021-06-12 19:17:43,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:17:43,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273757574] [2021-06-12 19:17:43,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:17:43,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:17:43,145 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:17:43,146 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:17:43,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273757574] [2021-06-12 19:17:43,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273757574] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:17:43,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836637207] [2021-06-12 19:17:43,146 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 [2021-06-12 19:17:43,186 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:17:43,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:17:43,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-12 19:17:43,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:17:43,252 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:17:43,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [836637207] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:17:43,253 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:17:43,253 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-06-12 19:17:43,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658726108] [2021-06-12 19:17:43,253 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 19:17:43,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:17:43,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 19:17:43,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:17:43,254 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) [2021-06-12 19:17:43,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:17:43,366 INFO L93 Difference]: Finished difference Result 1432 states and 3672 transitions. [2021-06-12 19:17:43,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:17:43,367 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 [2021-06-12 19:17:43,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:17:43,369 INFO L225 Difference]: With dead ends: 1432 [2021-06-12 19:17:43,370 INFO L226 Difference]: Without dead ends: 1365 [2021-06-12 19:17:43,370 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 92.8ms TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:17:43,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1365 states. [2021-06-12 19:17:43,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1365 to 1356. [2021-06-12 19:17:43,387 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) [2021-06-12 19:17:43,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1356 states to 1356 states and 3533 transitions. [2021-06-12 19:17:43,408 INFO L78 Accepts]: Start accepts. Automaton has 1356 states and 3533 transitions. Word has length 23 [2021-06-12 19:17:43,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:17:43,408 INFO L482 AbstractCegarLoop]: Abstraction has 1356 states and 3533 transitions. [2021-06-12 19:17:43,408 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) [2021-06-12 19:17:43,408 INFO L276 IsEmpty]: Start isEmpty. Operand 1356 states and 3533 transitions. [2021-06-12 19:17:43,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 19:17:43,410 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:17:43,410 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:17:43,624 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:17:43,625 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:17:43,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:17:43,625 INFO L82 PathProgramCache]: Analyzing trace with hash 2131794949, now seen corresponding path program 18 times [2021-06-12 19:17:43,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:17:43,625 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704062322] [2021-06-12 19:17:43,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:17:43,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:17:43,685 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:17:43,685 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:17:43,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704062322] [2021-06-12 19:17:43,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704062322] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:17:43,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060623262] [2021-06-12 19:17:43,685 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 [2021-06-12 19:17:43,724 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 19:17:43,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:17:43,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 19:17:43,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:17:43,775 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:17:43,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1060623262] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:17:43,776 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:17:43,776 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-12 19:17:43,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294816815] [2021-06-12 19:17:43,776 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 19:17:43,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:17:43,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 19:17:43,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-06-12 19:17:43,777 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) [2021-06-12 19:17:43,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:17:43,929 INFO L93 Difference]: Finished difference Result 1715 states and 4244 transitions. [2021-06-12 19:17:43,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:17:43,930 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 [2021-06-12 19:17:43,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:17:43,933 INFO L225 Difference]: With dead ends: 1715 [2021-06-12 19:17:43,933 INFO L226 Difference]: Without dead ends: 1715 [2021-06-12 19:17:43,933 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 86.4ms TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:17:43,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1715 states. [2021-06-12 19:17:43,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1715 to 1404. [2021-06-12 19:17:43,955 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) [2021-06-12 19:17:43,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1404 states to 1404 states and 3666 transitions. [2021-06-12 19:17:43,958 INFO L78 Accepts]: Start accepts. Automaton has 1404 states and 3666 transitions. Word has length 26 [2021-06-12 19:17:43,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:17:43,958 INFO L482 AbstractCegarLoop]: Abstraction has 1404 states and 3666 transitions. [2021-06-12 19:17:43,958 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) [2021-06-12 19:17:43,958 INFO L276 IsEmpty]: Start isEmpty. Operand 1404 states and 3666 transitions. [2021-06-12 19:17:43,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 19:17:43,961 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:17:43,961 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:17:44,184 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-06-12 19:17:44,185 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:17:44,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:17:44,185 INFO L82 PathProgramCache]: Analyzing trace with hash 761307032, now seen corresponding path program 19 times [2021-06-12 19:17:44,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:17:44,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235564576] [2021-06-12 19:17:44,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:17:44,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:17:44,226 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:17:44,226 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:17:44,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235564576] [2021-06-12 19:17:44,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235564576] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:17:44,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350357726] [2021-06-12 19:17:44,226 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 [2021-06-12 19:17:44,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:17:44,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 19:17:44,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:17:44,304 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:17:44,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1350357726] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:17:44,304 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:17:44,304 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 7 [2021-06-12 19:17:44,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649082409] [2021-06-12 19:17:44,304 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 19:17:44,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:17:44,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 19:17:44,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-06-12 19:17:44,305 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) [2021-06-12 19:17:44,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:17:44,395 INFO L93 Difference]: Finished difference Result 2473 states and 6334 transitions. [2021-06-12 19:17:44,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 19:17:44,396 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 [2021-06-12 19:17:44,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:17:44,399 INFO L225 Difference]: With dead ends: 2473 [2021-06-12 19:17:44,399 INFO L226 Difference]: Without dead ends: 2455 [2021-06-12 19:17:44,400 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 48.2ms TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:17:44,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2455 states. [2021-06-12 19:17:44,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2455 to 2018. [2021-06-12 19:17:44,430 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) [2021-06-12 19:17:44,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2018 states to 2018 states and 5462 transitions. [2021-06-12 19:17:44,434 INFO L78 Accepts]: Start accepts. Automaton has 2018 states and 5462 transitions. Word has length 26 [2021-06-12 19:17:44,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:17:44,434 INFO L482 AbstractCegarLoop]: Abstraction has 2018 states and 5462 transitions. [2021-06-12 19:17:44,434 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) [2021-06-12 19:17:44,434 INFO L276 IsEmpty]: Start isEmpty. Operand 2018 states and 5462 transitions. [2021-06-12 19:17:44,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 19:17:44,437 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:17:44,437 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:17:44,660 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:17:44,661 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:17:44,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:17:44,661 INFO L82 PathProgramCache]: Analyzing trace with hash -195885608, now seen corresponding path program 20 times [2021-06-12 19:17:44,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:17:44,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29790698] [2021-06-12 19:17:44,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:17:44,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:17:44,695 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:17:44,695 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:17:44,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29790698] [2021-06-12 19:17:44,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29790698] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:17:44,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262328422] [2021-06-12 19:17:44,695 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 [2021-06-12 19:17:44,720 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:17:44,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:17:44,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 19:17:44,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:17:44,782 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:17:44,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [262328422] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:17:44,782 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:17:44,782 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 6 [2021-06-12 19:17:44,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268748143] [2021-06-12 19:17:44,783 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-12 19:17:44,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:17:44,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-12 19:17:44,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-12 19:17:44,795 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) [2021-06-12 19:17:44,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:17:44,907 INFO L93 Difference]: Finished difference Result 2447 states and 6260 transitions. [2021-06-12 19:17:44,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:17:44,908 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 [2021-06-12 19:17:44,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:17:44,910 INFO L225 Difference]: With dead ends: 2447 [2021-06-12 19:17:44,910 INFO L226 Difference]: Without dead ends: 2447 [2021-06-12 19:17:44,910 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 49.4ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:17:44,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2447 states. [2021-06-12 19:17:44,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2447 to 1914. [2021-06-12 19:17:44,936 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) [2021-06-12 19:17:44,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1914 states to 1914 states and 5147 transitions. [2021-06-12 19:17:44,940 INFO L78 Accepts]: Start accepts. Automaton has 1914 states and 5147 transitions. Word has length 26 [2021-06-12 19:17:44,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:17:44,940 INFO L482 AbstractCegarLoop]: Abstraction has 1914 states and 5147 transitions. [2021-06-12 19:17:44,940 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) [2021-06-12 19:17:44,940 INFO L276 IsEmpty]: Start isEmpty. Operand 1914 states and 5147 transitions. [2021-06-12 19:17:44,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 19:17:44,942 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:17:44,943 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:17:45,156 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-06-12 19:17:45,157 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:17:45,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:17:45,157 INFO L82 PathProgramCache]: Analyzing trace with hash -1127702055, now seen corresponding path program 21 times [2021-06-12 19:17:45,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:17:45,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923223846] [2021-06-12 19:17:45,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:17:45,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:17:45,191 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:17:45,191 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:17:45,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923223846] [2021-06-12 19:17:45,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923223846] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:17:45,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143147493] [2021-06-12 19:17:45,191 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 [2021-06-12 19:17:45,215 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 19:17:45,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:17:45,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 19:17:45,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:17:45,261 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:17:45,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [143147493] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:17:45,261 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:17:45,261 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-12 19:17:45,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134589974] [2021-06-12 19:17:45,261 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-12 19:17:45,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:17:45,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-12 19:17:45,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-12 19:17:45,262 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) [2021-06-12 19:17:45,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:17:45,345 INFO L93 Difference]: Finished difference Result 2092 states and 5497 transitions. [2021-06-12 19:17:45,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-12 19:17:45,345 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 [2021-06-12 19:17:45,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:17:45,348 INFO L225 Difference]: With dead ends: 2092 [2021-06-12 19:17:45,348 INFO L226 Difference]: Without dead ends: 2089 [2021-06-12 19:17:45,348 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 36.6ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-12 19:17:45,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2089 states. [2021-06-12 19:17:45,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2089 to 1899. [2021-06-12 19:17:45,377 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) [2021-06-12 19:17:45,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1899 states to 1899 states and 5096 transitions. [2021-06-12 19:17:45,381 INFO L78 Accepts]: Start accepts. Automaton has 1899 states and 5096 transitions. Word has length 26 [2021-06-12 19:17:45,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:17:45,381 INFO L482 AbstractCegarLoop]: Abstraction has 1899 states and 5096 transitions. [2021-06-12 19:17:45,381 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) [2021-06-12 19:17:45,382 INFO L276 IsEmpty]: Start isEmpty. Operand 1899 states and 5096 transitions. [2021-06-12 19:17:45,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 19:17:45,385 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:17:45,385 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:17:45,600 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:17:45,601 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:17:45,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:17:45,601 INFO L82 PathProgramCache]: Analyzing trace with hash -1111998297, now seen corresponding path program 22 times [2021-06-12 19:17:45,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:17:45,601 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275677906] [2021-06-12 19:17:45,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:17:45,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:17:45,634 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:17:45,635 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:17:45,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275677906] [2021-06-12 19:17:45,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275677906] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:17:45,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811205639] [2021-06-12 19:17:45,635 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 [2021-06-12 19:17:45,669 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:17:45,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:17:45,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 19:17:45,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:17:45,713 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:17:45,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [811205639] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:17:45,714 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:17:45,714 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-12 19:17:45,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132332205] [2021-06-12 19:17:45,714 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-12 19:17:45,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:17:45,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-12 19:17:45,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-12 19:17:45,714 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) [2021-06-12 19:17:45,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:17:45,806 INFO L93 Difference]: Finished difference Result 2552 states and 6599 transitions. [2021-06-12 19:17:45,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:17:45,807 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 [2021-06-12 19:17:45,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:17:45,809 INFO L225 Difference]: With dead ends: 2552 [2021-06-12 19:17:45,809 INFO L226 Difference]: Without dead ends: 2552 [2021-06-12 19:17:45,809 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 45.0ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-06-12 19:17:45,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2552 states. [2021-06-12 19:17:45,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2552 to 2092. [2021-06-12 19:17:45,837 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) [2021-06-12 19:17:45,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2092 states to 2092 states and 5674 transitions. [2021-06-12 19:17:45,855 INFO L78 Accepts]: Start accepts. Automaton has 2092 states and 5674 transitions. Word has length 26 [2021-06-12 19:17:45,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:17:45,855 INFO L482 AbstractCegarLoop]: Abstraction has 2092 states and 5674 transitions. [2021-06-12 19:17:45,856 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) [2021-06-12 19:17:45,856 INFO L276 IsEmpty]: Start isEmpty. Operand 2092 states and 5674 transitions. [2021-06-12 19:17:45,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 19:17:45,858 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:17:45,859 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:17:46,072 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-06-12 19:17:46,073 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:17:46,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:17:46,073 INFO L82 PathProgramCache]: Analyzing trace with hash -1689374502, now seen corresponding path program 23 times [2021-06-12 19:17:46,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:17:46,073 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050131595] [2021-06-12 19:17:46,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:17:46,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:17:46,118 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:17:46,118 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:17:46,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050131595] [2021-06-12 19:17:46,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050131595] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:17:46,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780586593] [2021-06-12 19:17:46,118 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-12 19:17:46,149 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 19:17:46,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:17:46,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 19:17:46,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:17:46,198 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:17:46,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [780586593] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:17:46,199 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:17:46,199 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 7 [2021-06-12 19:17:46,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865446880] [2021-06-12 19:17:46,199 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 19:17:46,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:17:46,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 19:17:46,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-12 19:17:46,200 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) [2021-06-12 19:17:46,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:17:46,294 INFO L93 Difference]: Finished difference Result 3728 states and 10027 transitions. [2021-06-12 19:17:46,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:17:46,295 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 [2021-06-12 19:17:46,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:17:46,299 INFO L225 Difference]: With dead ends: 3728 [2021-06-12 19:17:46,299 INFO L226 Difference]: Without dead ends: 3712 [2021-06-12 19:17:46,299 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 41.3ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:17:46,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3712 states. [2021-06-12 19:17:46,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3712 to 3201. [2021-06-12 19:17:46,354 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) [2021-06-12 19:17:46,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3201 states to 3201 states and 9003 transitions. [2021-06-12 19:17:46,362 INFO L78 Accepts]: Start accepts. Automaton has 3201 states and 9003 transitions. Word has length 26 [2021-06-12 19:17:46,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:17:46,362 INFO L482 AbstractCegarLoop]: Abstraction has 3201 states and 9003 transitions. [2021-06-12 19:17:46,362 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) [2021-06-12 19:17:46,362 INFO L276 IsEmpty]: Start isEmpty. Operand 3201 states and 9003 transitions. [2021-06-12 19:17:46,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 19:17:46,366 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:17:46,366 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:17:46,580 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2021-06-12 19:17:46,580 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:17:46,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:17:46,581 INFO L82 PathProgramCache]: Analyzing trace with hash 1983712384, now seen corresponding path program 24 times [2021-06-12 19:17:46,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:17:46,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929422918] [2021-06-12 19:17:46,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:17:46,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:17:46,610 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:17:46,610 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:17:46,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929422918] [2021-06-12 19:17:46,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929422918] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:17:46,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243683364] [2021-06-12 19:17:46,611 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 [2021-06-12 19:17:46,635 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 19:17:46,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:17:46,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 19:17:46,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:17:46,680 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:17:46,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [243683364] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:17:46,681 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:17:46,681 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 7 [2021-06-12 19:17:46,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508553743] [2021-06-12 19:17:46,681 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 19:17:46,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:17:46,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 19:17:46,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-12 19:17:46,681 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) [2021-06-12 19:17:46,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:17:46,796 INFO L93 Difference]: Finished difference Result 3830 states and 10240 transitions. [2021-06-12 19:17:46,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:17:46,796 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 [2021-06-12 19:17:46,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:17:46,800 INFO L225 Difference]: With dead ends: 3830 [2021-06-12 19:17:46,800 INFO L226 Difference]: Without dead ends: 3830 [2021-06-12 19:17:46,800 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 48.6ms TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:17:46,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3830 states. [2021-06-12 19:17:46,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3830 to 3216. [2021-06-12 19:17:46,853 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) [2021-06-12 19:17:46,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3216 states to 3216 states and 9021 transitions. [2021-06-12 19:17:46,860 INFO L78 Accepts]: Start accepts. Automaton has 3216 states and 9021 transitions. Word has length 26 [2021-06-12 19:17:46,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:17:46,860 INFO L482 AbstractCegarLoop]: Abstraction has 3216 states and 9021 transitions. [2021-06-12 19:17:46,860 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) [2021-06-12 19:17:46,860 INFO L276 IsEmpty]: Start isEmpty. Operand 3216 states and 9021 transitions. [2021-06-12 19:17:46,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 19:17:46,864 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:17:46,864 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:17:47,076 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:17:47,077 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:17:47,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:17:47,077 INFO L82 PathProgramCache]: Analyzing trace with hash 1051895937, now seen corresponding path program 25 times [2021-06-12 19:17:47,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:17:47,077 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058610508] [2021-06-12 19:17:47,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:17:47,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:17:47,108 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:17:47,108 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:17:47,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058610508] [2021-06-12 19:17:47,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058610508] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:17:47,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918967563] [2021-06-12 19:17:47,108 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 [2021-06-12 19:17:47,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:17:47,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 19:17:47,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:17:47,185 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:17:47,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [918967563] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:17:47,185 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:17:47,185 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-12 19:17:47,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639188029] [2021-06-12 19:17:47,185 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-12 19:17:47,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:17:47,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-12 19:17:47,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-12 19:17:47,186 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) [2021-06-12 19:17:47,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:17:47,295 INFO L93 Difference]: Finished difference Result 3629 states and 9839 transitions. [2021-06-12 19:17:47,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-12 19:17:47,295 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 [2021-06-12 19:17:47,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:17:47,301 INFO L225 Difference]: With dead ends: 3629 [2021-06-12 19:17:47,301 INFO L226 Difference]: Without dead ends: 3617 [2021-06-12 19:17:47,301 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 35.4ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-06-12 19:17:47,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3617 states. [2021-06-12 19:17:47,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3617 to 3079. [2021-06-12 19:17:47,348 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) [2021-06-12 19:17:47,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3079 states to 3079 states and 8612 transitions. [2021-06-12 19:17:47,355 INFO L78 Accepts]: Start accepts. Automaton has 3079 states and 8612 transitions. Word has length 26 [2021-06-12 19:17:47,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:17:47,356 INFO L482 AbstractCegarLoop]: Abstraction has 3079 states and 8612 transitions. [2021-06-12 19:17:47,356 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) [2021-06-12 19:17:47,356 INFO L276 IsEmpty]: Start isEmpty. Operand 3079 states and 8612 transitions. [2021-06-12 19:17:47,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 19:17:47,359 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:17:47,359 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:17:47,572 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-06-12 19:17:47,573 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:17:47,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:17:47,573 INFO L82 PathProgramCache]: Analyzing trace with hash 346139928, now seen corresponding path program 26 times [2021-06-12 19:17:47,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:17:47,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282755531] [2021-06-12 19:17:47,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:17:47,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:17:47,614 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:17:47,614 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:17:47,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282755531] [2021-06-12 19:17:47,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282755531] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:17:47,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250585779] [2021-06-12 19:17:47,614 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 [2021-06-12 19:17:47,637 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:17:47,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:17:47,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 19:17:47,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:17:47,688 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:17:47,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1250585779] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:17:47,688 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:17:47,688 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 7 [2021-06-12 19:17:47,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514955204] [2021-06-12 19:17:47,688 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 19:17:47,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:17:47,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 19:17:47,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-06-12 19:17:47,689 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) [2021-06-12 19:17:47,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:17:47,834 INFO L93 Difference]: Finished difference Result 4208 states and 11364 transitions. [2021-06-12 19:17:47,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:17:47,834 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 [2021-06-12 19:17:47,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:17:47,839 INFO L225 Difference]: With dead ends: 4208 [2021-06-12 19:17:47,839 INFO L226 Difference]: Without dead ends: 4208 [2021-06-12 19:17:47,839 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 68.1ms TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:17:47,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4208 states. [2021-06-12 19:17:47,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4208 to 3506. [2021-06-12 19:17:47,891 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) [2021-06-12 19:17:47,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3506 states to 3506 states and 9879 transitions. [2021-06-12 19:17:47,898 INFO L78 Accepts]: Start accepts. Automaton has 3506 states and 9879 transitions. Word has length 26 [2021-06-12 19:17:47,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:17:47,898 INFO L482 AbstractCegarLoop]: Abstraction has 3506 states and 9879 transitions. [2021-06-12 19:17:47,898 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) [2021-06-12 19:17:47,898 INFO L276 IsEmpty]: Start isEmpty. Operand 3506 states and 9879 transitions. [2021-06-12 19:17:47,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 19:17:47,901 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:17:47,901 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:17:48,102 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:17:48,102 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:17:48,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:17:48,102 INFO L82 PathProgramCache]: Analyzing trace with hash 1258958503, now seen corresponding path program 27 times [2021-06-12 19:17:48,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:17:48,102 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509321818] [2021-06-12 19:17:48,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:17:48,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:17:48,146 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:17:48,146 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:17:48,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509321818] [2021-06-12 19:17:48,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509321818] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:17:48,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950444362] [2021-06-12 19:17:48,146 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 [2021-06-12 19:17:48,191 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 19:17:48,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:17:48,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 19:17:48,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:17:48,248 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:17:48,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950444362] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:17:48,248 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:17:48,248 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-12 19:17:48,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127086010] [2021-06-12 19:17:48,249 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-12 19:17:48,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:17:48,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-12 19:17:48,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-12 19:17:48,249 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) [2021-06-12 19:17:48,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:17:48,380 INFO L93 Difference]: Finished difference Result 3876 states and 10634 transitions. [2021-06-12 19:17:48,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 19:17:48,381 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 [2021-06-12 19:17:48,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:17:48,386 INFO L225 Difference]: With dead ends: 3876 [2021-06-12 19:17:48,387 INFO L226 Difference]: Without dead ends: 3864 [2021-06-12 19:17:48,388 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 59.0ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:17:48,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3864 states. [2021-06-12 19:17:48,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3864 to 3527. [2021-06-12 19:17:48,443 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) [2021-06-12 19:17:48,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3527 states to 3527 states and 9913 transitions. [2021-06-12 19:17:48,451 INFO L78 Accepts]: Start accepts. Automaton has 3527 states and 9913 transitions. Word has length 26 [2021-06-12 19:17:48,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:17:48,452 INFO L482 AbstractCegarLoop]: Abstraction has 3527 states and 9913 transitions. [2021-06-12 19:17:48,452 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) [2021-06-12 19:17:48,453 INFO L276 IsEmpty]: Start isEmpty. Operand 3527 states and 9913 transitions. [2021-06-12 19:17:48,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 19:17:48,456 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:17:48,456 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:17:48,660 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-06-12 19:17:48,661 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:17:48,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:17:48,661 INFO L82 PathProgramCache]: Analyzing trace with hash -1264613717, now seen corresponding path program 28 times [2021-06-12 19:17:48,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:17:48,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298341433] [2021-06-12 19:17:48,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:17:48,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:17:48,709 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:17:48,709 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:17:48,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298341433] [2021-06-12 19:17:48,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298341433] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:17:48,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077585394] [2021-06-12 19:17:48,710 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 [2021-06-12 19:17:48,735 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:17:48,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:17:48,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 19:17:48,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:17:48,847 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:17:48,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2077585394] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:17:48,847 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:17:48,847 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2021-06-12 19:17:48,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019002825] [2021-06-12 19:17:48,847 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 19:17:48,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:17:48,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 19:17:48,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:17:48,848 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) [2021-06-12 19:17:49,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:17:49,050 INFO L93 Difference]: Finished difference Result 4288 states and 11605 transitions. [2021-06-12 19:17:49,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:17:49,050 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 [2021-06-12 19:17:49,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:17:49,057 INFO L225 Difference]: With dead ends: 4288 [2021-06-12 19:17:49,057 INFO L226 Difference]: Without dead ends: 4288 [2021-06-12 19:17:49,057 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 110.5ms TimeCoverageRelationStatistics Valid=77, Invalid=105, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:17:49,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4288 states. [2021-06-12 19:17:49,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4288 to 3636. [2021-06-12 19:17:49,124 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) [2021-06-12 19:17:49,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3636 states to 3636 states and 10243 transitions. [2021-06-12 19:17:49,133 INFO L78 Accepts]: Start accepts. Automaton has 3636 states and 10243 transitions. Word has length 26 [2021-06-12 19:17:49,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:17:49,133 INFO L482 AbstractCegarLoop]: Abstraction has 3636 states and 10243 transitions. [2021-06-12 19:17:49,133 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) [2021-06-12 19:17:49,133 INFO L276 IsEmpty]: Start isEmpty. Operand 3636 states and 10243 transitions. [2021-06-12 19:17:49,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 19:17:49,137 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:17:49,137 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:17:49,350 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-06-12 19:17:49,350 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:17:49,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:17:49,351 INFO L82 PathProgramCache]: Analyzing trace with hash -535116392, now seen corresponding path program 29 times [2021-06-12 19:17:49,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:17:49,351 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862065095] [2021-06-12 19:17:49,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:17:49,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:17:49,391 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:17:49,391 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:17:49,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862065095] [2021-06-12 19:17:49,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862065095] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:17:49,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730533919] [2021-06-12 19:17:49,391 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 [2021-06-12 19:17:49,432 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 19:17:49,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:17:49,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 19:17:49,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:17:49,499 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:17:49,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1730533919] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:17:49,500 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:17:49,500 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 8 [2021-06-12 19:17:49,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015962820] [2021-06-12 19:17:49,501 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 19:17:49,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:17:49,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 19:17:49,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-06-12 19:17:49,501 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) [2021-06-12 19:17:49,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:17:49,654 INFO L93 Difference]: Finished difference Result 4890 states and 13623 transitions. [2021-06-12 19:17:49,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:17:49,654 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 [2021-06-12 19:17:49,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:17:49,660 INFO L225 Difference]: With dead ends: 4890 [2021-06-12 19:17:49,660 INFO L226 Difference]: Without dead ends: 4858 [2021-06-12 19:17:49,660 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 64.4ms TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:17:49,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4858 states. [2021-06-12 19:17:49,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4858 to 4449. [2021-06-12 19:17:49,711 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) [2021-06-12 19:17:49,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4449 states to 4449 states and 12643 transitions. [2021-06-12 19:17:49,719 INFO L78 Accepts]: Start accepts. Automaton has 4449 states and 12643 transitions. Word has length 26 [2021-06-12 19:17:49,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:17:49,719 INFO L482 AbstractCegarLoop]: Abstraction has 4449 states and 12643 transitions. [2021-06-12 19:17:49,719 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) [2021-06-12 19:17:49,719 INFO L276 IsEmpty]: Start isEmpty. Operand 4449 states and 12643 transitions. [2021-06-12 19:17:49,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 19:17:49,722 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:17:49,722 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:17:49,922 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:17:49,923 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:17:49,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:17:49,923 INFO L82 PathProgramCache]: Analyzing trace with hash -2036715645, now seen corresponding path program 30 times [2021-06-12 19:17:49,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:17:49,923 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564672520] [2021-06-12 19:17:49,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:17:49,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:17:49,958 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:17:49,958 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:17:49,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564672520] [2021-06-12 19:17:49,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564672520] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:17:49,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95535828] [2021-06-12 19:17:49,959 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 [2021-06-12 19:17:49,990 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 19:17:49,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:17:49,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 19:17:49,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:17:50,033 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:17:50,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [95535828] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:17:50,033 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:17:50,034 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-12 19:17:50,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815385965] [2021-06-12 19:17:50,034 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-12 19:17:50,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:17:50,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-12 19:17:50,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-12 19:17:50,035 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) [2021-06-12 19:17:50,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:17:50,134 INFO L93 Difference]: Finished difference Result 5697 states and 15817 transitions. [2021-06-12 19:17:50,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:17:50,134 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 [2021-06-12 19:17:50,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:17:50,141 INFO L225 Difference]: With dead ends: 5697 [2021-06-12 19:17:50,141 INFO L226 Difference]: Without dead ends: 5697 [2021-06-12 19:17:50,141 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 46.8ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-06-12 19:17:50,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5697 states. [2021-06-12 19:17:50,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5697 to 5030. [2021-06-12 19:17:50,208 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) [2021-06-12 19:17:50,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5030 states to 5030 states and 14412 transitions. [2021-06-12 19:17:50,219 INFO L78 Accepts]: Start accepts. Automaton has 5030 states and 14412 transitions. Word has length 26 [2021-06-12 19:17:50,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:17:50,219 INFO L482 AbstractCegarLoop]: Abstraction has 5030 states and 14412 transitions. [2021-06-12 19:17:50,220 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) [2021-06-12 19:17:50,220 INFO L276 IsEmpty]: Start isEmpty. Operand 5030 states and 14412 transitions. [2021-06-12 19:17:50,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 19:17:50,224 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:17:50,224 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:17:50,436 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:17:50,437 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:17:50,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:17:50,437 INFO L82 PathProgramCache]: Analyzing trace with hash 1680875446, now seen corresponding path program 31 times [2021-06-12 19:17:50,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:17:50,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377632317] [2021-06-12 19:17:50,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:17:50,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:17:50,467 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:17:50,468 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:17:50,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377632317] [2021-06-12 19:17:50,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377632317] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:17:50,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435038311] [2021-06-12 19:17:50,468 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 [2021-06-12 19:17:50,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:17:50,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 19:17:50,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:17:50,539 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:17:50,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435038311] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:17:50,539 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:17:50,539 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 6 [2021-06-12 19:17:50,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416116647] [2021-06-12 19:17:50,539 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-12 19:17:50,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:17:50,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-12 19:17:50,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-12 19:17:50,540 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) [2021-06-12 19:17:50,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:17:50,667 INFO L93 Difference]: Finished difference Result 6176 states and 17476 transitions. [2021-06-12 19:17:50,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:17:50,667 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 [2021-06-12 19:17:50,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:17:50,675 INFO L225 Difference]: With dead ends: 6176 [2021-06-12 19:17:50,675 INFO L226 Difference]: Without dead ends: 6160 [2021-06-12 19:17:50,675 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 43.9ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:17:50,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6160 states. [2021-06-12 19:17:50,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6160 to 5779. [2021-06-12 19:17:50,740 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) [2021-06-12 19:17:50,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5779 states to 5779 states and 16650 transitions. [2021-06-12 19:17:50,750 INFO L78 Accepts]: Start accepts. Automaton has 5779 states and 16650 transitions. Word has length 26 [2021-06-12 19:17:50,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:17:50,750 INFO L482 AbstractCegarLoop]: Abstraction has 5779 states and 16650 transitions. [2021-06-12 19:17:50,750 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) [2021-06-12 19:17:50,750 INFO L276 IsEmpty]: Start isEmpty. Operand 5779 states and 16650 transitions. [2021-06-12 19:17:50,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 19:17:50,753 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:17:50,753 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:17:50,953 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:17:50,954 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:17:50,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:17:50,954 INFO L82 PathProgramCache]: Analyzing trace with hash 1058995036, now seen corresponding path program 32 times [2021-06-12 19:17:50,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:17:50,954 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480730229] [2021-06-12 19:17:50,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:17:50,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:17:50,988 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:17:50,988 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:17:50,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480730229] [2021-06-12 19:17:50,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480730229] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:17:50,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733822169] [2021-06-12 19:17:50,989 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 [2021-06-12 19:17:51,011 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:17:51,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:17:51,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 19:17:51,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:17:51,059 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:17:51,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1733822169] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:17:51,059 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:17:51,059 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 6 [2021-06-12 19:17:51,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366750755] [2021-06-12 19:17:51,059 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-12 19:17:51,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:17:51,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-12 19:17:51,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-06-12 19:17:51,060 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) [2021-06-12 19:17:51,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:17:51,214 INFO L93 Difference]: Finished difference Result 6311 states and 17791 transitions. [2021-06-12 19:17:51,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:17:51,215 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 [2021-06-12 19:17:51,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:17:51,222 INFO L225 Difference]: With dead ends: 6311 [2021-06-12 19:17:51,222 INFO L226 Difference]: Without dead ends: 6311 [2021-06-12 19:17:51,222 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 46.6ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:17:51,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6311 states. [2021-06-12 19:17:51,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6311 to 5796. [2021-06-12 19:17:51,290 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) [2021-06-12 19:17:51,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5796 states to 5796 states and 16694 transitions. [2021-06-12 19:17:51,301 INFO L78 Accepts]: Start accepts. Automaton has 5796 states and 16694 transitions. Word has length 26 [2021-06-12 19:17:51,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:17:51,302 INFO L482 AbstractCegarLoop]: Abstraction has 5796 states and 16694 transitions. [2021-06-12 19:17:51,302 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) [2021-06-12 19:17:51,302 INFO L276 IsEmpty]: Start isEmpty. Operand 5796 states and 16694 transitions. [2021-06-12 19:17:51,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 19:17:51,305 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:17:51,305 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:17:51,505 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-06-12 19:17:51,506 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:17:51,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:17:51,506 INFO L82 PathProgramCache]: Analyzing trace with hash 127178589, now seen corresponding path program 33 times [2021-06-12 19:17:51,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:17:51,506 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185075596] [2021-06-12 19:17:51,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:17:51,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:17:51,543 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:17:51,544 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:17:51,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185075596] [2021-06-12 19:17:51,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185075596] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:17:51,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302572740] [2021-06-12 19:17:51,544 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 [2021-06-12 19:17:51,568 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 19:17:51,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:17:51,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 19:17:51,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:17:51,618 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:17:51,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [302572740] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:17:51,618 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:17:51,618 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-12 19:17:51,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290744519] [2021-06-12 19:17:51,619 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-12 19:17:51,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:17:51,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-12 19:17:51,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-12 19:17:51,620 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) [2021-06-12 19:17:51,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:17:51,689 INFO L93 Difference]: Finished difference Result 6492 states and 18169 transitions. [2021-06-12 19:17:51,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-12 19:17:51,689 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 [2021-06-12 19:17:51,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:17:51,697 INFO L225 Difference]: With dead ends: 6492 [2021-06-12 19:17:51,697 INFO L226 Difference]: Without dead ends: 6489 [2021-06-12 19:17:51,697 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 26.3ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-06-12 19:17:51,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6489 states. [2021-06-12 19:17:51,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6489 to 5795. [2021-06-12 19:17:51,784 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) [2021-06-12 19:17:51,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5795 states to 5795 states and 16684 transitions. [2021-06-12 19:17:51,794 INFO L78 Accepts]: Start accepts. Automaton has 5795 states and 16684 transitions. Word has length 26 [2021-06-12 19:17:51,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:17:51,794 INFO L482 AbstractCegarLoop]: Abstraction has 5795 states and 16684 transitions. [2021-06-12 19:17:51,794 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) [2021-06-12 19:17:51,794 INFO L276 IsEmpty]: Start isEmpty. Operand 5795 states and 16684 transitions. [2021-06-12 19:17:51,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 19:17:51,797 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:17:51,797 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:17:52,000 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:17:52,001 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:17:52,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:17:52,001 INFO L82 PathProgramCache]: Analyzing trace with hash -578577420, now seen corresponding path program 34 times [2021-06-12 19:17:52,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:17:52,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543574258] [2021-06-12 19:17:52,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:17:52,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:17:52,038 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:17:52,038 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:17:52,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543574258] [2021-06-12 19:17:52,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543574258] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:17:52,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532354547] [2021-06-12 19:17:52,039 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 [2021-06-12 19:17:52,062 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:17:52,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:17:52,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 19:17:52,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:17:52,158 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:17:52,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1532354547] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:17:52,159 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:17:52,159 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 7 [2021-06-12 19:17:52,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175367115] [2021-06-12 19:17:52,159 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 19:17:52,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:17:52,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 19:17:52,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-06-12 19:17:52,160 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) [2021-06-12 19:17:52,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:17:52,326 INFO L93 Difference]: Finished difference Result 6497 states and 18243 transitions. [2021-06-12 19:17:52,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:17:52,327 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 [2021-06-12 19:17:52,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:17:52,335 INFO L225 Difference]: With dead ends: 6497 [2021-06-12 19:17:52,336 INFO L226 Difference]: Without dead ends: 6497 [2021-06-12 19:17:52,336 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 106.3ms TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:17:52,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6497 states. [2021-06-12 19:17:52,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6497 to 5692. [2021-06-12 19:17:52,410 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) [2021-06-12 19:17:52,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5692 states to 5692 states and 16338 transitions. [2021-06-12 19:17:52,420 INFO L78 Accepts]: Start accepts. Automaton has 5692 states and 16338 transitions. Word has length 26 [2021-06-12 19:17:52,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:17:52,420 INFO L482 AbstractCegarLoop]: Abstraction has 5692 states and 16338 transitions. [2021-06-12 19:17:52,420 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) [2021-06-12 19:17:52,420 INFO L276 IsEmpty]: Start isEmpty. Operand 5692 states and 16338 transitions. [2021-06-12 19:17:52,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 19:17:52,423 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:17:52,423 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:17:52,624 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:17:52,624 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:17:52,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:17:52,624 INFO L82 PathProgramCache]: Analyzing trace with hash 334241155, now seen corresponding path program 35 times [2021-06-12 19:17:52,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:17:52,624 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481372211] [2021-06-12 19:17:52,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:17:52,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:17:52,661 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:17:52,662 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:17:52,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481372211] [2021-06-12 19:17:52,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481372211] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:17:52,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423931247] [2021-06-12 19:17:52,662 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 [2021-06-12 19:17:52,696 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-12 19:17:52,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:17:52,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 19:17:52,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:17:52,754 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:17:52,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [423931247] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:17:52,754 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:17:52,754 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 8 [2021-06-12 19:17:52,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105866287] [2021-06-12 19:17:52,754 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 19:17:52,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:17:52,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 19:17:52,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-06-12 19:17:52,755 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) [2021-06-12 19:17:52,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:17:52,882 INFO L93 Difference]: Finished difference Result 8010 states and 22671 transitions. [2021-06-12 19:17:52,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:17:52,882 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 [2021-06-12 19:17:52,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:17:52,893 INFO L225 Difference]: With dead ends: 8010 [2021-06-12 19:17:52,893 INFO L226 Difference]: Without dead ends: 7995 [2021-06-12 19:17:52,893 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 54.6ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:17:52,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7995 states. [2021-06-12 19:17:53,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7995 to 7490. [2021-06-12 19:17:53,045 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) [2021-06-12 19:17:53,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7490 states to 7490 states and 21658 transitions. [2021-06-12 19:17:53,057 INFO L78 Accepts]: Start accepts. Automaton has 7490 states and 21658 transitions. Word has length 26 [2021-06-12 19:17:53,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:17:53,058 INFO L482 AbstractCegarLoop]: Abstraction has 7490 states and 21658 transitions. [2021-06-12 19:17:53,058 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) [2021-06-12 19:17:53,058 INFO L276 IsEmpty]: Start isEmpty. Operand 7490 states and 21658 transitions. [2021-06-12 19:17:53,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 19:17:53,061 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:17:53,061 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:17:53,262 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable82 [2021-06-12 19:17:53,262 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:17:53,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:17:53,262 INFO L82 PathProgramCache]: Analyzing trace with hash -232684456, now seen corresponding path program 36 times [2021-06-12 19:17:53,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:17:53,263 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170220737] [2021-06-12 19:17:53,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:17:53,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:17:53,313 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:17:53,314 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:17:53,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170220737] [2021-06-12 19:17:53,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170220737] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:17:53,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307983714] [2021-06-12 19:17:53,314 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 [2021-06-12 19:17:53,337 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 19:17:53,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:17:53,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 19:17:53,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:17:53,407 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:17:53,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307983714] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:17:53,408 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:17:53,408 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 12 [2021-06-12 19:17:53,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928394028] [2021-06-12 19:17:53,408 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:17:53,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:17:53,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:17:53,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:17:53,408 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) [2021-06-12 19:17:53,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:17:53,654 INFO L93 Difference]: Finished difference Result 8305 states and 23489 transitions. [2021-06-12 19:17:53,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:17:53,655 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 [2021-06-12 19:17:53,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:17:53,670 INFO L225 Difference]: With dead ends: 8305 [2021-06-12 19:17:53,670 INFO L226 Difference]: Without dead ends: 8305 [2021-06-12 19:17:53,670 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 136.4ms TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:17:53,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8305 states. [2021-06-12 19:17:53,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8305 to 5349. [2021-06-12 19:17:53,737 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) [2021-06-12 19:17:53,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5349 states to 5349 states and 15316 transitions. [2021-06-12 19:17:53,745 INFO L78 Accepts]: Start accepts. Automaton has 5349 states and 15316 transitions. Word has length 26 [2021-06-12 19:17:53,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:17:53,745 INFO L482 AbstractCegarLoop]: Abstraction has 5349 states and 15316 transitions. [2021-06-12 19:17:53,745 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) [2021-06-12 19:17:53,745 INFO L276 IsEmpty]: Start isEmpty. Operand 5349 states and 15316 transitions. [2021-06-12 19:17:53,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-12 19:17:53,748 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:17:53,748 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:17:53,949 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:17:53,950 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:17:53,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:17:53,950 INFO L82 PathProgramCache]: Analyzing trace with hash 1947181405, now seen corresponding path program 37 times [2021-06-12 19:17:53,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:17:53,950 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157124213] [2021-06-12 19:17:53,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:17:53,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:17:54,013 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:17:54,013 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:17:54,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157124213] [2021-06-12 19:17:54,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157124213] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:17:54,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [730050023] [2021-06-12 19:17:54,014 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 [2021-06-12 19:17:54,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:17:54,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-12 19:17:54,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:17:54,085 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:17:54,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [730050023] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:17:54,085 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:17:54,085 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-12 19:17:54,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041031536] [2021-06-12 19:17:54,085 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 19:17:54,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:17:54,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 19:17:54,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-06-12 19:17:54,086 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) [2021-06-12 19:17:54,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:17:54,237 INFO L93 Difference]: Finished difference Result 5938 states and 16533 transitions. [2021-06-12 19:17:54,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 19:17:54,238 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 [2021-06-12 19:17:54,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:17:54,245 INFO L225 Difference]: With dead ends: 5938 [2021-06-12 19:17:54,245 INFO L226 Difference]: Without dead ends: 5915 [2021-06-12 19:17:54,245 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 77.5ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:17:54,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5915 states. [2021-06-12 19:17:54,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5915 to 5382. [2021-06-12 19:17:54,310 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) [2021-06-12 19:17:54,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5382 states to 5382 states and 15379 transitions. [2021-06-12 19:17:54,320 INFO L78 Accepts]: Start accepts. Automaton has 5382 states and 15379 transitions. Word has length 26 [2021-06-12 19:17:54,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:17:54,320 INFO L482 AbstractCegarLoop]: Abstraction has 5382 states and 15379 transitions. [2021-06-12 19:17:54,320 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) [2021-06-12 19:17:54,320 INFO L276 IsEmpty]: Start isEmpty. Operand 5382 states and 15379 transitions. [2021-06-12 19:17:54,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 19:17:54,325 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:17:54,325 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:17:54,525 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2021-06-12 19:17:54,525 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:17:54,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:17:54,526 INFO L82 PathProgramCache]: Analyzing trace with hash -1692037720, now seen corresponding path program 5 times [2021-06-12 19:17:54,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:17:54,526 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2859703] [2021-06-12 19:17:54,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:17:54,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:17:54,579 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:17:54,579 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:17:54,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2859703] [2021-06-12 19:17:54,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2859703] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:17:54,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815914870] [2021-06-12 19:17:54,580 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-12 19:17:54,603 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 19:17:54,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:17:54,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 19:17:54,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:17:54,668 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:17:54,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815914870] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:17:54,668 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:17:54,668 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-12 19:17:54,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431219916] [2021-06-12 19:17:54,669 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 19:17:54,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:17:54,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 19:17:54,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-06-12 19:17:54,669 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) [2021-06-12 19:17:54,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:17:54,911 INFO L93 Difference]: Finished difference Result 5894 states and 16303 transitions. [2021-06-12 19:17:54,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:17:54,911 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 [2021-06-12 19:17:54,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:17:54,918 INFO L225 Difference]: With dead ends: 5894 [2021-06-12 19:17:54,919 INFO L226 Difference]: Without dead ends: 5890 [2021-06-12 19:17:54,919 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 103.4ms TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:17:54,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5890 states. [2021-06-12 19:17:54,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5890 to 5478. [2021-06-12 19:17:54,986 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) [2021-06-12 19:17:54,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5478 states to 5478 states and 15466 transitions. [2021-06-12 19:17:54,996 INFO L78 Accepts]: Start accepts. Automaton has 5478 states and 15466 transitions. Word has length 29 [2021-06-12 19:17:54,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:17:54,996 INFO L482 AbstractCegarLoop]: Abstraction has 5478 states and 15466 transitions. [2021-06-12 19:17:54,996 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) [2021-06-12 19:17:54,996 INFO L276 IsEmpty]: Start isEmpty. Operand 5478 states and 15466 transitions. [2021-06-12 19:17:55,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 19:17:55,001 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:17:55,001 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:17:55,201 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:17:55,201 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:17:55,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:17:55,202 INFO L82 PathProgramCache]: Analyzing trace with hash 2081641864, now seen corresponding path program 38 times [2021-06-12 19:17:55,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:17:55,202 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520268989] [2021-06-12 19:17:55,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:17:55,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:17:55,240 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:17:55,241 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:17:55,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520268989] [2021-06-12 19:17:55,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520268989] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:17:55,241 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363591467] [2021-06-12 19:17:55,241 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 [2021-06-12 19:17:55,272 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:17:55,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:17:55,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:17:55,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:17:55,323 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:17:55,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1363591467] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:17:55,324 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:17:55,324 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-12 19:17:55,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869419408] [2021-06-12 19:17:55,325 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-12 19:17:55,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:17:55,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-12 19:17:55,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-12 19:17:55,326 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) [2021-06-12 19:17:55,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:17:55,467 INFO L93 Difference]: Finished difference Result 6571 states and 18236 transitions. [2021-06-12 19:17:55,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-12 19:17:55,468 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 [2021-06-12 19:17:55,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:17:55,474 INFO L225 Difference]: With dead ends: 6571 [2021-06-12 19:17:55,475 INFO L226 Difference]: Without dead ends: 6564 [2021-06-12 19:17:55,475 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.5ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-12 19:17:55,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6564 states. [2021-06-12 19:17:55,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6564 to 6354. [2021-06-12 19:17:55,539 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) [2021-06-12 19:17:55,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6354 states to 6354 states and 17841 transitions. [2021-06-12 19:17:55,548 INFO L78 Accepts]: Start accepts. Automaton has 6354 states and 17841 transitions. Word has length 29 [2021-06-12 19:17:55,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:17:55,548 INFO L482 AbstractCegarLoop]: Abstraction has 6354 states and 17841 transitions. [2021-06-12 19:17:55,548 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) [2021-06-12 19:17:55,548 INFO L276 IsEmpty]: Start isEmpty. Operand 6354 states and 17841 transitions. [2021-06-12 19:17:55,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 19:17:55,553 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:17:55,553 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:17:55,768 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:17:55,769 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:17:55,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:17:55,769 INFO L82 PathProgramCache]: Analyzing trace with hash -159779870, now seen corresponding path program 39 times [2021-06-12 19:17:55,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:17:55,769 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719946250] [2021-06-12 19:17:55,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:17:55,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:17:55,812 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-12 19:17:55,813 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:17:55,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719946250] [2021-06-12 19:17:55,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719946250] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:17:55,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075236563] [2021-06-12 19:17:55,813 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 [2021-06-12 19:17:55,850 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 19:17:55,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:17:55,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-12 19:17:55,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:17:56,024 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-12 19:17:56,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1075236563] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:17:56,024 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:17:56,024 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 9] total 12 [2021-06-12 19:17:56,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1384629952] [2021-06-12 19:17:56,025 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:17:56,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:17:56,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:17:56,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:17:56,025 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) [2021-06-12 19:17:56,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:17:56,828 INFO L93 Difference]: Finished difference Result 14438 states and 39075 transitions. [2021-06-12 19:17:56,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 19:17:56,829 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 [2021-06-12 19:17:56,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:17:56,853 INFO L225 Difference]: With dead ends: 14438 [2021-06-12 19:17:56,853 INFO L226 Difference]: Without dead ends: 14355 [2021-06-12 19:17:56,854 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 437.5ms TimeCoverageRelationStatistics Valid=181, Invalid=749, Unknown=0, NotChecked=0, Total=930 [2021-06-12 19:17:56,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14355 states. [2021-06-12 19:17:57,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14355 to 8796. [2021-06-12 19:17:57,048 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) [2021-06-12 19:17:57,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8796 states to 8796 states and 25178 transitions. [2021-06-12 19:17:57,065 INFO L78 Accepts]: Start accepts. Automaton has 8796 states and 25178 transitions. Word has length 29 [2021-06-12 19:17:57,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:17:57,065 INFO L482 AbstractCegarLoop]: Abstraction has 8796 states and 25178 transitions. [2021-06-12 19:17:57,065 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) [2021-06-12 19:17:57,065 INFO L276 IsEmpty]: Start isEmpty. Operand 8796 states and 25178 transitions. [2021-06-12 19:17:57,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 19:17:57,070 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:17:57,071 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:17:57,271 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:17:57,271 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:17:57,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:17:57,272 INFO L82 PathProgramCache]: Analyzing trace with hash 328852904, now seen corresponding path program 6 times [2021-06-12 19:17:57,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:17:57,272 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580353919] [2021-06-12 19:17:57,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:17:57,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:17:57,337 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:17:57,338 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:17:57,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580353919] [2021-06-12 19:17:57,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580353919] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:17:57,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802741379] [2021-06-12 19:17:57,338 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-12 19:17:57,362 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 19:17:57,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:17:57,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:17:57,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:17:57,508 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:17:57,512 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-06-12 19:17:57,513 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:17:57,515 INFO L628 ElimStorePlain]: treesize reduction 14, result has 6.7 percent of original size [2021-06-12 19:17:57,515 INFO L518 ElimStorePlain]: Eliminatee B vanished before elimination [2021-06-12 19:17:57,516 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:17:57,516 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:22, output treesize:1 [2021-06-12 19:17:57,522 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:17:57,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [802741379] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:17:57,522 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:17:57,522 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-06-12 19:17:57,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101346961] [2021-06-12 19:17:57,522 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:17:57,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:17:57,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:17:57,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:17:57,523 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) [2021-06-12 19:17:57,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:17:57,786 INFO L93 Difference]: Finished difference Result 6002 states and 16256 transitions. [2021-06-12 19:17:57,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:17:57,786 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 [2021-06-12 19:17:57,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:17:57,792 INFO L225 Difference]: With dead ends: 6002 [2021-06-12 19:17:57,793 INFO L226 Difference]: Without dead ends: 5857 [2021-06-12 19:17:57,793 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 79.1ms TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:17:57,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5857 states. [2021-06-12 19:17:57,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5857 to 3330. [2021-06-12 19:17:57,871 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) [2021-06-12 19:17:57,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3330 states to 3330 states and 9315 transitions. [2021-06-12 19:17:57,876 INFO L78 Accepts]: Start accepts. Automaton has 3330 states and 9315 transitions. Word has length 29 [2021-06-12 19:17:57,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:17:57,876 INFO L482 AbstractCegarLoop]: Abstraction has 3330 states and 9315 transitions. [2021-06-12 19:17:57,876 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) [2021-06-12 19:17:57,876 INFO L276 IsEmpty]: Start isEmpty. Operand 3330 states and 9315 transitions. [2021-06-12 19:17:57,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 19:17:57,878 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:17:57,878 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:17:58,078 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:17:58,079 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:17:58,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:17:58,079 INFO L82 PathProgramCache]: Analyzing trace with hash -114875864, now seen corresponding path program 7 times [2021-06-12 19:17:58,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:17:58,079 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972617270] [2021-06-12 19:17:58,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:17:58,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:17:58,134 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:17:58,134 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:17:58,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972617270] [2021-06-12 19:17:58,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972617270] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:17:58,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009589404] [2021-06-12 19:17:58,135 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 [2021-06-12 19:17:58,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:17:58,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 19:17:58,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:17:58,219 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:17:58,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2009589404] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:17:58,219 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:17:58,219 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-06-12 19:17:58,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480349415] [2021-06-12 19:17:58,219 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-12 19:17:58,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:17:58,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-12 19:17:58,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-12 19:17:58,220 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) [2021-06-12 19:17:58,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:17:58,310 INFO L93 Difference]: Finished difference Result 3434 states and 9538 transitions. [2021-06-12 19:17:58,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:17:58,312 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 [2021-06-12 19:17:58,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:17:58,317 INFO L225 Difference]: With dead ends: 3434 [2021-06-12 19:17:58,317 INFO L226 Difference]: Without dead ends: 3434 [2021-06-12 19:17:58,317 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 57.4ms TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-06-12 19:17:58,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3434 states. [2021-06-12 19:17:58,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3434 to 3356. [2021-06-12 19:17:58,348 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) [2021-06-12 19:17:58,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3356 states to 3356 states and 9376 transitions. [2021-06-12 19:17:58,353 INFO L78 Accepts]: Start accepts. Automaton has 3356 states and 9376 transitions. Word has length 29 [2021-06-12 19:17:58,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:17:58,353 INFO L482 AbstractCegarLoop]: Abstraction has 3356 states and 9376 transitions. [2021-06-12 19:17:58,353 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) [2021-06-12 19:17:58,353 INFO L276 IsEmpty]: Start isEmpty. Operand 3356 states and 9376 transitions. [2021-06-12 19:17:58,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 19:17:58,355 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:17:58,355 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:17:58,556 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-06-12 19:17:58,557 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:17:58,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:17:58,557 INFO L82 PathProgramCache]: Analyzing trace with hash 1336556998, now seen corresponding path program 6 times [2021-06-12 19:17:58,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:17:58,557 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219795672] [2021-06-12 19:17:58,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:17:58,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:17:58,607 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:17:58,607 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:17:58,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219795672] [2021-06-12 19:17:58,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1219795672] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:17:58,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676249928] [2021-06-12 19:17:58,607 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 [2021-06-12 19:17:58,631 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-12 19:17:58,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:17:58,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 19:17:58,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:17:58,691 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:17:58,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1676249928] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:17:58,691 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:17:58,691 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-06-12 19:17:58,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938115655] [2021-06-12 19:17:58,692 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-12 19:17:58,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:17:58,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-12 19:17:58,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-12 19:17:58,692 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) [2021-06-12 19:17:58,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:17:58,807 INFO L93 Difference]: Finished difference Result 3792 states and 10255 transitions. [2021-06-12 19:17:58,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:17:58,808 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 [2021-06-12 19:17:58,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:17:58,812 INFO L225 Difference]: With dead ends: 3792 [2021-06-12 19:17:58,812 INFO L226 Difference]: Without dead ends: 3777 [2021-06-12 19:17:58,812 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 54.9ms TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-06-12 19:17:58,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3777 states. [2021-06-12 19:17:58,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3777 to 3443. [2021-06-12 19:17:58,847 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) [2021-06-12 19:17:58,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3443 states to 3443 states and 9568 transitions. [2021-06-12 19:17:58,852 INFO L78 Accepts]: Start accepts. Automaton has 3443 states and 9568 transitions. Word has length 29 [2021-06-12 19:17:58,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:17:58,852 INFO L482 AbstractCegarLoop]: Abstraction has 3443 states and 9568 transitions. [2021-06-12 19:17:58,852 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) [2021-06-12 19:17:58,853 INFO L276 IsEmpty]: Start isEmpty. Operand 3443 states and 9568 transitions. [2021-06-12 19:17:58,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 19:17:58,855 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:17:58,855 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:17:59,055 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-06-12 19:17:59,055 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:17:59,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:17:59,056 INFO L82 PathProgramCache]: Analyzing trace with hash -1458077306, now seen corresponding path program 8 times [2021-06-12 19:17:59,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:17:59,056 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595465393] [2021-06-12 19:17:59,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:17:59,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:17:59,111 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:17:59,111 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:17:59,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595465393] [2021-06-12 19:17:59,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595465393] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:17:59,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206084905] [2021-06-12 19:17:59,112 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 [2021-06-12 19:17:59,157 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:17:59,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:17:59,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 19:17:59,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:17:59,230 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:17:59,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [206084905] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:17:59,231 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:17:59,231 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-06-12 19:17:59,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136458905] [2021-06-12 19:17:59,231 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-12 19:17:59,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:17:59,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-12 19:17:59,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-12 19:17:59,231 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) [2021-06-12 19:17:59,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:17:59,386 INFO L93 Difference]: Finished difference Result 3707 states and 10003 transitions. [2021-06-12 19:17:59,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:17:59,387 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 [2021-06-12 19:17:59,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:17:59,391 INFO L225 Difference]: With dead ends: 3707 [2021-06-12 19:17:59,391 INFO L226 Difference]: Without dead ends: 3623 [2021-06-12 19:17:59,392 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 55.8ms TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-06-12 19:17:59,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3623 states. [2021-06-12 19:17:59,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3623 to 3361. [2021-06-12 19:17:59,436 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) [2021-06-12 19:17:59,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3361 states to 3361 states and 9276 transitions. [2021-06-12 19:17:59,441 INFO L78 Accepts]: Start accepts. Automaton has 3361 states and 9276 transitions. Word has length 29 [2021-06-12 19:17:59,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:17:59,441 INFO L482 AbstractCegarLoop]: Abstraction has 3361 states and 9276 transitions. [2021-06-12 19:17:59,441 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) [2021-06-12 19:17:59,441 INFO L276 IsEmpty]: Start isEmpty. Operand 3361 states and 9276 transitions. [2021-06-12 19:17:59,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 19:17:59,443 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:17:59,443 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:17:59,644 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-06-12 19:17:59,644 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:17:59,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:17:59,644 INFO L82 PathProgramCache]: Analyzing trace with hash -2071613486, now seen corresponding path program 9 times [2021-06-12 19:17:59,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:17:59,644 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53328460] [2021-06-12 19:17:59,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:17:59,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:17:59,697 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-12 19:17:59,697 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:17:59,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53328460] [2021-06-12 19:17:59,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53328460] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:17:59,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779223931] [2021-06-12 19:17:59,697 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 [2021-06-12 19:17:59,743 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-12 19:17:59,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:17:59,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 19:17:59,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:17:59,795 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-12 19:17:59,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779223931] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:17:59,795 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:17:59,795 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-06-12 19:17:59,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724212243] [2021-06-12 19:17:59,796 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-12 19:17:59,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:17:59,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-12 19:17:59,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-12 19:17:59,796 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) [2021-06-12 19:17:59,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:17:59,916 INFO L93 Difference]: Finished difference Result 3919 states and 10560 transitions. [2021-06-12 19:17:59,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:17:59,916 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 [2021-06-12 19:17:59,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:17:59,921 INFO L225 Difference]: With dead ends: 3919 [2021-06-12 19:17:59,921 INFO L226 Difference]: Without dead ends: 3907 [2021-06-12 19:17:59,922 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 58.6ms TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-06-12 19:17:59,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3907 states. [2021-06-12 19:17:59,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3907 to 3641. [2021-06-12 19:17:59,978 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) [2021-06-12 19:17:59,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3641 states to 3641 states and 9995 transitions. [2021-06-12 19:17:59,985 INFO L78 Accepts]: Start accepts. Automaton has 3641 states and 9995 transitions. Word has length 29 [2021-06-12 19:17:59,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:17:59,985 INFO L482 AbstractCegarLoop]: Abstraction has 3641 states and 9995 transitions. [2021-06-12 19:17:59,985 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) [2021-06-12 19:17:59,985 INFO L276 IsEmpty]: Start isEmpty. Operand 3641 states and 9995 transitions. [2021-06-12 19:17:59,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 19:17:59,990 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:17:59,990 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:18:00,213 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-06-12 19:18:00,214 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:18:00,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:18:00,214 INFO L82 PathProgramCache]: Analyzing trace with hash 1048811592, now seen corresponding path program 40 times [2021-06-12 19:18:00,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:18:00,214 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798892077] [2021-06-12 19:18:00,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:18:00,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:18:00,248 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-12 19:18:00,248 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:18:00,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798892077] [2021-06-12 19:18:00,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798892077] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:18:00,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764770543] [2021-06-12 19:18:00,248 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 [2021-06-12 19:18:00,272 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:18:00,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:18:00,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:18:00,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:18:00,311 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-12 19:18:00,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1764770543] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:18:00,311 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:18:00,312 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-12 19:18:00,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097344839] [2021-06-12 19:18:00,312 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-12 19:18:00,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:18:00,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-12 19:18:00,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-12 19:18:00,312 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) [2021-06-12 19:18:00,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:18:00,411 INFO L93 Difference]: Finished difference Result 4879 states and 13397 transitions. [2021-06-12 19:18:00,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-12 19:18:00,412 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 [2021-06-12 19:18:00,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:18:00,417 INFO L225 Difference]: With dead ends: 4879 [2021-06-12 19:18:00,418 INFO L226 Difference]: Without dead ends: 4866 [2021-06-12 19:18:00,418 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.9ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-12 19:18:00,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4866 states. [2021-06-12 19:18:00,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4866 to 4554. [2021-06-12 19:18:00,464 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) [2021-06-12 19:18:00,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4554 states to 4554 states and 12740 transitions. [2021-06-12 19:18:00,471 INFO L78 Accepts]: Start accepts. Automaton has 4554 states and 12740 transitions. Word has length 29 [2021-06-12 19:18:00,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:18:00,471 INFO L482 AbstractCegarLoop]: Abstraction has 4554 states and 12740 transitions. [2021-06-12 19:18:00,471 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) [2021-06-12 19:18:00,471 INFO L276 IsEmpty]: Start isEmpty. Operand 4554 states and 12740 transitions. [2021-06-12 19:18:00,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 19:18:00,474 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:18:00,474 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:18:00,674 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-06-12 19:18:00,675 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:18:00,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:18:00,675 INFO L82 PathProgramCache]: Analyzing trace with hash 70303848, now seen corresponding path program 10 times [2021-06-12 19:18:00,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:18:00,675 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203337088] [2021-06-12 19:18:00,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:18:00,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:18:00,720 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:18:00,720 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:18:00,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203337088] [2021-06-12 19:18:00,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203337088] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:18:00,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994756959] [2021-06-12 19:18:00,720 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 [2021-06-12 19:18:00,749 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:18:00,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:18:00,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 19:18:00,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:18:00,805 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:18:00,805 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 [2021-06-12 19:18:00,806 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:18:00,822 INFO L628 ElimStorePlain]: treesize reduction 20, result has 4.8 percent of original size [2021-06-12 19:18:00,822 INFO L518 ElimStorePlain]: Eliminatee B vanished before elimination [2021-06-12 19:18:00,823 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:18:00,823 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:1 [2021-06-12 19:18:00,831 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:18:00,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1994756959] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:18:00,832 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:18:00,832 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-12 19:18:00,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622126445] [2021-06-12 19:18:00,832 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 19:18:00,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:18:00,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 19:18:00,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:18:00,833 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) [2021-06-12 19:18:01,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:18:01,089 INFO L93 Difference]: Finished difference Result 7716 states and 21017 transitions. [2021-06-12 19:18:01,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:18:01,089 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 [2021-06-12 19:18:01,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:18:01,099 INFO L225 Difference]: With dead ends: 7716 [2021-06-12 19:18:01,099 INFO L226 Difference]: Without dead ends: 7689 [2021-06-12 19:18:01,099 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 93.9ms TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:18:01,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7689 states. [2021-06-12 19:18:01,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7689 to 6612. [2021-06-12 19:18:01,188 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) [2021-06-12 19:18:01,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6612 states to 6612 states and 18577 transitions. [2021-06-12 19:18:01,200 INFO L78 Accepts]: Start accepts. Automaton has 6612 states and 18577 transitions. Word has length 29 [2021-06-12 19:18:01,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:18:01,200 INFO L482 AbstractCegarLoop]: Abstraction has 6612 states and 18577 transitions. [2021-06-12 19:18:01,200 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) [2021-06-12 19:18:01,201 INFO L276 IsEmpty]: Start isEmpty. Operand 6612 states and 18577 transitions. [2021-06-12 19:18:01,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 19:18:01,204 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:18:01,204 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:18:01,405 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2021-06-12 19:18:01,405 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:18:01,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:18:01,405 INFO L82 PathProgramCache]: Analyzing trace with hash -1154021054, now seen corresponding path program 7 times [2021-06-12 19:18:01,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:18:01,405 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519162052] [2021-06-12 19:18:01,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:18:01,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:18:01,453 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:18:01,453 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:18:01,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519162052] [2021-06-12 19:18:01,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519162052] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:18:01,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56275113] [2021-06-12 19:18:01,453 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 [2021-06-12 19:18:01,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:18:01,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 19:18:01,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:18:01,548 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:18:01,549 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 [2021-06-12 19:18:01,550 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:18:01,552 INFO L628 ElimStorePlain]: treesize reduction 20, result has 4.8 percent of original size [2021-06-12 19:18:01,552 INFO L518 ElimStorePlain]: Eliminatee B vanished before elimination [2021-06-12 19:18:01,552 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:18:01,552 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:1 [2021-06-12 19:18:01,558 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:18:01,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [56275113] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:18:01,558 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:18:01,559 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-12 19:18:01,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610144716] [2021-06-12 19:18:01,559 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 19:18:01,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:18:01,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 19:18:01,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:18:01,559 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) [2021-06-12 19:18:01,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:18:01,829 INFO L93 Difference]: Finished difference Result 7693 states and 20980 transitions. [2021-06-12 19:18:01,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:18:01,829 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 [2021-06-12 19:18:01,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:18:01,841 INFO L225 Difference]: With dead ends: 7693 [2021-06-12 19:18:01,841 INFO L226 Difference]: Without dead ends: 7662 [2021-06-12 19:18:01,842 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 110.3ms TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:18:01,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7662 states. [2021-06-12 19:18:01,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7662 to 6972. [2021-06-12 19:18:01,957 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) [2021-06-12 19:18:01,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6972 states to 6972 states and 19510 transitions. [2021-06-12 19:18:01,974 INFO L78 Accepts]: Start accepts. Automaton has 6972 states and 19510 transitions. Word has length 29 [2021-06-12 19:18:01,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:18:01,974 INFO L482 AbstractCegarLoop]: Abstraction has 6972 states and 19510 transitions. [2021-06-12 19:18:01,974 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) [2021-06-12 19:18:01,975 INFO L276 IsEmpty]: Start isEmpty. Operand 6972 states and 19510 transitions. [2021-06-12 19:18:01,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 19:18:01,979 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:18:01,980 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:18:02,203 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:18:02,203 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:18:02,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:18:02,204 INFO L82 PathProgramCache]: Analyzing trace with hash 1507649858, now seen corresponding path program 11 times [2021-06-12 19:18:02,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:18:02,204 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409037121] [2021-06-12 19:18:02,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:18:02,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:18:02,260 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:18:02,260 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:18:02,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409037121] [2021-06-12 19:18:02,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [409037121] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:18:02,260 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936589842] [2021-06-12 19:18:02,260 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-12 19:18:02,292 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 19:18:02,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:18:02,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 19:18:02,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:18:02,388 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:18:02,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [936589842] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:18:02,388 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:18:02,388 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-06-12 19:18:02,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768782907] [2021-06-12 19:18:02,388 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 19:18:02,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:18:02,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 19:18:02,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-06-12 19:18:02,389 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) [2021-06-12 19:18:02,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:18:02,552 INFO L93 Difference]: Finished difference Result 6857 states and 19119 transitions. [2021-06-12 19:18:02,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 19:18:02,553 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 [2021-06-12 19:18:02,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:18:02,562 INFO L225 Difference]: With dead ends: 6857 [2021-06-12 19:18:02,562 INFO L226 Difference]: Without dead ends: 6823 [2021-06-12 19:18:02,562 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 58.9ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-06-12 19:18:02,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6823 states. [2021-06-12 19:18:02,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6823 to 6569. [2021-06-12 19:18:02,657 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) [2021-06-12 19:18:02,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6569 states to 6569 states and 18566 transitions. [2021-06-12 19:18:02,670 INFO L78 Accepts]: Start accepts. Automaton has 6569 states and 18566 transitions. Word has length 29 [2021-06-12 19:18:02,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:18:02,670 INFO L482 AbstractCegarLoop]: Abstraction has 6569 states and 18566 transitions. [2021-06-12 19:18:02,670 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) [2021-06-12 19:18:02,671 INFO L276 IsEmpty]: Start isEmpty. Operand 6569 states and 18566 transitions. [2021-06-12 19:18:02,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 19:18:02,674 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:18:02,674 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:18:02,874 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-06-12 19:18:02,875 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:18:02,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:18:02,875 INFO L82 PathProgramCache]: Analyzing trace with hash 1002279274, now seen corresponding path program 8 times [2021-06-12 19:18:02,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:18:02,875 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174027805] [2021-06-12 19:18:02,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:18:02,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:18:02,939 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:18:02,939 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:18:02,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174027805] [2021-06-12 19:18:02,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174027805] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:18:02,939 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562192030] [2021-06-12 19:18:02,939 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 [2021-06-12 19:18:02,980 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:18:02,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:18:02,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 19:18:02,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:18:03,031 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:18:03,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [562192030] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:18:03,032 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:18:03,032 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-06-12 19:18:03,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624041526] [2021-06-12 19:18:03,032 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-12 19:18:03,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:18:03,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-12 19:18:03,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-12 19:18:03,033 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) [2021-06-12 19:18:03,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:18:03,168 INFO L93 Difference]: Finished difference Result 6936 states and 19307 transitions. [2021-06-12 19:18:03,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:18:03,168 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 [2021-06-12 19:18:03,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:18:03,176 INFO L225 Difference]: With dead ends: 6936 [2021-06-12 19:18:03,176 INFO L226 Difference]: Without dead ends: 6928 [2021-06-12 19:18:03,176 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 63.7ms TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-06-12 19:18:03,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6928 states. [2021-06-12 19:18:03,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6928 to 6620. [2021-06-12 19:18:03,252 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) [2021-06-12 19:18:03,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6620 states to 6620 states and 18675 transitions. [2021-06-12 19:18:03,263 INFO L78 Accepts]: Start accepts. Automaton has 6620 states and 18675 transitions. Word has length 29 [2021-06-12 19:18:03,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:18:03,263 INFO L482 AbstractCegarLoop]: Abstraction has 6620 states and 18675 transitions. [2021-06-12 19:18:03,263 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) [2021-06-12 19:18:03,263 INFO L276 IsEmpty]: Start isEmpty. Operand 6620 states and 18675 transitions. [2021-06-12 19:18:03,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 19:18:03,266 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:18:03,266 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:18:03,467 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:18:03,467 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:18:03,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:18:03,467 INFO L82 PathProgramCache]: Analyzing trace with hash -1792355030, now seen corresponding path program 12 times [2021-06-12 19:18:03,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:18:03,468 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167503530] [2021-06-12 19:18:03,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:18:03,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:18:03,556 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:18:03,557 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:18:03,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167503530] [2021-06-12 19:18:03,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167503530] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:18:03,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423404752] [2021-06-12 19:18:03,557 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 [2021-06-12 19:18:03,590 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-12 19:18:03,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:18:03,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:18:03,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:18:03,661 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:18:03,662 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 [2021-06-12 19:18:03,664 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:18:03,666 INFO L628 ElimStorePlain]: treesize reduction 14, result has 6.7 percent of original size [2021-06-12 19:18:03,666 INFO L518 ElimStorePlain]: Eliminatee B vanished before elimination [2021-06-12 19:18:03,666 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:18:03,666 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:22, output treesize:1 [2021-06-12 19:18:03,673 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:18:03,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [423404752] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:18:03,674 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:18:03,674 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-06-12 19:18:03,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396312267] [2021-06-12 19:18:03,674 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-12 19:18:03,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:18:03,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-12 19:18:03,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-12 19:18:03,675 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) [2021-06-12 19:18:03,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:18:03,867 INFO L93 Difference]: Finished difference Result 6433 states and 17744 transitions. [2021-06-12 19:18:03,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:18:03,867 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 [2021-06-12 19:18:03,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:18:03,877 INFO L225 Difference]: With dead ends: 6433 [2021-06-12 19:18:03,878 INFO L226 Difference]: Without dead ends: 6334 [2021-06-12 19:18:03,878 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 80.5ms TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-06-12 19:18:03,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6334 states. [2021-06-12 19:18:03,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6334 to 5949. [2021-06-12 19:18:03,963 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) [2021-06-12 19:18:04,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5949 states to 5949 states and 16755 transitions. [2021-06-12 19:18:04,038 INFO L78 Accepts]: Start accepts. Automaton has 5949 states and 16755 transitions. Word has length 29 [2021-06-12 19:18:04,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:18:04,038 INFO L482 AbstractCegarLoop]: Abstraction has 5949 states and 16755 transitions. [2021-06-12 19:18:04,038 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) [2021-06-12 19:18:04,038 INFO L276 IsEmpty]: Start isEmpty. Operand 5949 states and 16755 transitions. [2021-06-12 19:18:04,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 19:18:04,042 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:18:04,042 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:18:04,248 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable108 [2021-06-12 19:18:04,249 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:18:04,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:18:04,249 INFO L82 PathProgramCache]: Analyzing trace with hash 869370402, now seen corresponding path program 41 times [2021-06-12 19:18:04,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:18:04,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844224294] [2021-06-12 19:18:04,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:18:04,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:18:04,285 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:18:04,285 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:18:04,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844224294] [2021-06-12 19:18:04,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844224294] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:18:04,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584217678] [2021-06-12 19:18:04,285 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 [2021-06-12 19:18:04,315 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-12 19:18:04,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:18:04,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:18:04,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:18:04,360 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:18:04,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [584217678] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:18:04,361 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:18:04,361 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-12 19:18:04,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700400463] [2021-06-12 19:18:04,361 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-12 19:18:04,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:18:04,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-12 19:18:04,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-12 19:18:04,361 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) [2021-06-12 19:18:04,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:18:04,488 INFO L93 Difference]: Finished difference Result 6991 states and 19595 transitions. [2021-06-12 19:18:04,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-12 19:18:04,489 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 [2021-06-12 19:18:04,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:18:04,500 INFO L225 Difference]: With dead ends: 6991 [2021-06-12 19:18:04,500 INFO L226 Difference]: Without dead ends: 6978 [2021-06-12 19:18:04,500 INFO L728 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 [2021-06-12 19:18:04,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6978 states. [2021-06-12 19:18:04,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6978 to 6732. [2021-06-12 19:18:04,607 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) [2021-06-12 19:18:04,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6732 states to 6732 states and 19081 transitions. [2021-06-12 19:18:04,623 INFO L78 Accepts]: Start accepts. Automaton has 6732 states and 19081 transitions. Word has length 29 [2021-06-12 19:18:04,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:18:04,623 INFO L482 AbstractCegarLoop]: Abstraction has 6732 states and 19081 transitions. [2021-06-12 19:18:04,624 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) [2021-06-12 19:18:04,624 INFO L276 IsEmpty]: Start isEmpty. Operand 6732 states and 19081 transitions. [2021-06-12 19:18:04,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-12 19:18:04,628 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:18:04,628 INFO L472 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:18:04,844 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:18:04,845 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:18:04,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:18:04,845 INFO L82 PathProgramCache]: Analyzing trace with hash -109137342, now seen corresponding path program 13 times [2021-06-12 19:18:04,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:18:04,845 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592069130] [2021-06-12 19:18:04,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:18:04,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:18:04,895 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:18:04,895 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:18:04,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592069130] [2021-06-12 19:18:04,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592069130] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:18:04,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081116195] [2021-06-12 19:18:04,895 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 [2021-06-12 19:18:04,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:18:04,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 19:18:04,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:18:04,971 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:18:04,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2081116195] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:18:04,971 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:18:04,971 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-12 19:18:04,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135385555] [2021-06-12 19:18:04,972 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 19:18:04,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:18:04,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 19:18:04,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-06-12 19:18:04,972 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) [2021-06-12 19:18:05,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:18:05,172 INFO L93 Difference]: Finished difference Result 6655 states and 18587 transitions. [2021-06-12 19:18:05,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:18:05,173 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 [2021-06-12 19:18:05,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:18:05,182 INFO L225 Difference]: With dead ends: 6655 [2021-06-12 19:18:05,182 INFO L226 Difference]: Without dead ends: 6601 [2021-06-12 19:18:05,182 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 104.6ms TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:18:05,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6601 states. [2021-06-12 19:18:05,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6601 to 6248. [2021-06-12 19:18:05,259 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) [2021-06-12 19:18:05,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6248 states to 6248 states and 17682 transitions. [2021-06-12 19:18:05,270 INFO L78 Accepts]: Start accepts. Automaton has 6248 states and 17682 transitions. Word has length 29 [2021-06-12 19:18:05,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:18:05,270 INFO L482 AbstractCegarLoop]: Abstraction has 6248 states and 17682 transitions. [2021-06-12 19:18:05,270 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) [2021-06-12 19:18:05,270 INFO L276 IsEmpty]: Start isEmpty. Operand 6248 states and 17682 transitions. [2021-06-12 19:18:05,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-12 19:18:05,274 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:18:05,274 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:18:05,474 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:18:05,475 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:18:05,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:18:05,475 INFO L82 PathProgramCache]: Analyzing trace with hash -1428842088, now seen corresponding path program 42 times [2021-06-12 19:18:05,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:18:05,475 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873146760] [2021-06-12 19:18:05,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:18:05,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:18:05,545 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:18:05,545 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:18:05,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873146760] [2021-06-12 19:18:05,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873146760] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:18:05,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713257316] [2021-06-12 19:18:05,545 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 [2021-06-12 19:18:05,582 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-12 19:18:05,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:18:05,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-12 19:18:05,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:18:05,640 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:18:05,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1713257316] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:18:05,640 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:18:05,640 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-12 19:18:05,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926255174] [2021-06-12 19:18:05,641 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 19:18:05,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:18:05,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 19:18:05,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:18:05,641 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) [2021-06-12 19:18:05,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:18:05,924 INFO L93 Difference]: Finished difference Result 6779 states and 18724 transitions. [2021-06-12 19:18:05,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:18:05,925 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 [2021-06-12 19:18:05,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:18:05,935 INFO L225 Difference]: With dead ends: 6779 [2021-06-12 19:18:05,935 INFO L226 Difference]: Without dead ends: 6779 [2021-06-12 19:18:05,935 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 132.3ms TimeCoverageRelationStatistics Valid=99, Invalid=173, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:18:05,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6779 states. [2021-06-12 19:18:06,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6779 to 6214. [2021-06-12 19:18:06,018 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) [2021-06-12 19:18:06,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6214 states to 6214 states and 17580 transitions. [2021-06-12 19:18:06,029 INFO L78 Accepts]: Start accepts. Automaton has 6214 states and 17580 transitions. Word has length 32 [2021-06-12 19:18:06,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:18:06,029 INFO L482 AbstractCegarLoop]: Abstraction has 6214 states and 17580 transitions. [2021-06-12 19:18:06,029 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) [2021-06-12 19:18:06,029 INFO L276 IsEmpty]: Start isEmpty. Operand 6214 states and 17580 transitions. [2021-06-12 19:18:06,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-12 19:18:06,033 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:18:06,033 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:18:06,252 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:18:06,253 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:18:06,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:18:06,253 INFO L82 PathProgramCache]: Analyzing trace with hash -1675261659, now seen corresponding path program 43 times [2021-06-12 19:18:06,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:18:06,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152418456] [2021-06-12 19:18:06,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:18:06,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:18:06,311 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 15 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:18:06,311 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:18:06,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152418456] [2021-06-12 19:18:06,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152418456] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:18:06,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475148794] [2021-06-12 19:18:06,312 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 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 [2021-06-12 19:18:06,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:18:06,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-12 19:18:06,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:18:06,404 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 15 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:18:06,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [475148794] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:18:06,404 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:18:06,404 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 9 [2021-06-12 19:18:06,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45069833] [2021-06-12 19:18:06,405 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 19:18:06,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:18:06,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 19:18:06,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:18:06,405 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) [2021-06-12 19:18:06,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:18:06,575 INFO L93 Difference]: Finished difference Result 9059 states and 24818 transitions. [2021-06-12 19:18:06,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:18:06,575 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 [2021-06-12 19:18:06,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:18:06,585 INFO L225 Difference]: With dead ends: 9059 [2021-06-12 19:18:06,586 INFO L226 Difference]: Without dead ends: 9035 [2021-06-12 19:18:06,586 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 81.1ms TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:18:06,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9035 states. [2021-06-12 19:18:06,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9035 to 7541. [2021-06-12 19:18:06,674 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) [2021-06-12 19:18:06,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7541 states to 7541 states and 21523 transitions. [2021-06-12 19:18:06,687 INFO L78 Accepts]: Start accepts. Automaton has 7541 states and 21523 transitions. Word has length 32 [2021-06-12 19:18:06,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:18:06,687 INFO L482 AbstractCegarLoop]: Abstraction has 7541 states and 21523 transitions. [2021-06-12 19:18:06,687 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) [2021-06-12 19:18:06,687 INFO L276 IsEmpty]: Start isEmpty. Operand 7541 states and 21523 transitions. [2021-06-12 19:18:06,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-12 19:18:06,691 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:18:06,691 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:18:06,891 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-06-12 19:18:06,891 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:18:06,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:18:06,892 INFO L82 PathProgramCache]: Analyzing trace with hash -1825167733, now seen corresponding path program 44 times [2021-06-12 19:18:06,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:18:06,892 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797344469] [2021-06-12 19:18:06,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:18:06,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:18:06,936 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 19 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:18:06,936 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:18:06,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797344469] [2021-06-12 19:18:06,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797344469] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:18:06,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598541359] [2021-06-12 19:18:06,937 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 [2021-06-12 19:18:06,977 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:18:06,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:18:06,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-12 19:18:06,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:18:07,035 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 20 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:18:07,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1598541359] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:18:07,036 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:18:07,036 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 7 [2021-06-12 19:18:07,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886019440] [2021-06-12 19:18:07,036 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 19:18:07,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:18:07,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 19:18:07,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-06-12 19:18:07,036 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) [2021-06-12 19:18:07,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:18:07,185 INFO L93 Difference]: Finished difference Result 9025 states and 24686 transitions. [2021-06-12 19:18:07,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:18:07,186 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 [2021-06-12 19:18:07,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:18:07,195 INFO L225 Difference]: With dead ends: 9025 [2021-06-12 19:18:07,195 INFO L226 Difference]: Without dead ends: 9025 [2021-06-12 19:18:07,196 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 68.2ms TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:18:07,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9025 states. [2021-06-12 19:18:07,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9025 to 7365. [2021-06-12 19:18:07,301 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) [2021-06-12 19:18:07,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7365 states to 7365 states and 20968 transitions. [2021-06-12 19:18:07,312 INFO L78 Accepts]: Start accepts. Automaton has 7365 states and 20968 transitions. Word has length 32 [2021-06-12 19:18:07,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:18:07,312 INFO L482 AbstractCegarLoop]: Abstraction has 7365 states and 20968 transitions. [2021-06-12 19:18:07,312 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) [2021-06-12 19:18:07,312 INFO L276 IsEmpty]: Start isEmpty. Operand 7365 states and 20968 transitions. [2021-06-12 19:18:07,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-12 19:18:07,316 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:18:07,316 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:18:07,516 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2021-06-12 19:18:07,516 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:18:07,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:18:07,517 INFO L82 PathProgramCache]: Analyzing trace with hash 1537983116, now seen corresponding path program 45 times [2021-06-12 19:18:07,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:18:07,517 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820628423] [2021-06-12 19:18:07,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:18:07,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:18:07,555 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 21 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:18:07,555 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:18:07,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820628423] [2021-06-12 19:18:07,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820628423] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:18:07,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700167500] [2021-06-12 19:18:07,555 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 [2021-06-12 19:18:07,584 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-12 19:18:07,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:18:07,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-12 19:18:07,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:18:07,731 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-06-12 19:18:07,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1700167500] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:18:07,731 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:18:07,731 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 13 [2021-06-12 19:18:07,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053059487] [2021-06-12 19:18:07,732 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:18:07,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:18:07,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:18:07,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:18:07,732 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) [2021-06-12 19:18:08,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:18:08,176 INFO L93 Difference]: Finished difference Result 8303 states and 22757 transitions. [2021-06-12 19:18:08,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 19:18:08,177 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 [2021-06-12 19:18:08,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:18:08,186 INFO L225 Difference]: With dead ends: 8303 [2021-06-12 19:18:08,186 INFO L226 Difference]: Without dead ends: 8260 [2021-06-12 19:18:08,186 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 353.8ms TimeCoverageRelationStatistics Valid=190, Invalid=680, Unknown=0, NotChecked=0, Total=870 [2021-06-12 19:18:08,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8260 states. [2021-06-12 19:18:08,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8260 to 7571. [2021-06-12 19:18:08,272 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) [2021-06-12 19:18:08,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7571 states to 7571 states and 21322 transitions. [2021-06-12 19:18:08,284 INFO L78 Accepts]: Start accepts. Automaton has 7571 states and 21322 transitions. Word has length 32 [2021-06-12 19:18:08,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:18:08,284 INFO L482 AbstractCegarLoop]: Abstraction has 7571 states and 21322 transitions. [2021-06-12 19:18:08,284 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) [2021-06-12 19:18:08,284 INFO L276 IsEmpty]: Start isEmpty. Operand 7571 states and 21322 transitions. [2021-06-12 19:18:08,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-12 19:18:08,290 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:18:08,290 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:18:08,512 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2021-06-12 19:18:08,513 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:18:08,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:18:08,513 INFO L82 PathProgramCache]: Analyzing trace with hash 1465178531, now seen corresponding path program 46 times [2021-06-12 19:18:08,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:18:08,513 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171036349] [2021-06-12 19:18:08,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:18:08,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:18:08,555 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:18:08,555 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:18:08,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171036349] [2021-06-12 19:18:08,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171036349] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:18:08,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891672672] [2021-06-12 19:18:08,555 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 [2021-06-12 19:18:08,578 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:18:08,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:18:08,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-12 19:18:08,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:18:08,650 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 11 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:18:08,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1891672672] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:18:08,651 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:18:08,651 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 8 [2021-06-12 19:18:08,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663796964] [2021-06-12 19:18:08,651 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 19:18:08,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:18:08,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 19:18:08,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-06-12 19:18:08,652 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) [2021-06-12 19:18:08,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:18:08,853 INFO L93 Difference]: Finished difference Result 13088 states and 35868 transitions. [2021-06-12 19:18:08,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:18:08,854 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 [2021-06-12 19:18:08,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:18:08,871 INFO L225 Difference]: With dead ends: 13088 [2021-06-12 19:18:08,871 INFO L226 Difference]: Without dead ends: 13088 [2021-06-12 19:18:08,871 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 83.4ms TimeCoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:18:08,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13088 states. [2021-06-12 19:18:09,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13088 to 10587. [2021-06-12 19:18:09,071 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) [2021-06-12 19:18:09,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10587 states to 10587 states and 30390 transitions. [2021-06-12 19:18:09,092 INFO L78 Accepts]: Start accepts. Automaton has 10587 states and 30390 transitions. Word has length 32 [2021-06-12 19:18:09,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:18:09,092 INFO L482 AbstractCegarLoop]: Abstraction has 10587 states and 30390 transitions. [2021-06-12 19:18:09,092 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) [2021-06-12 19:18:09,092 INFO L276 IsEmpty]: Start isEmpty. Operand 10587 states and 30390 transitions. [2021-06-12 19:18:09,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-12 19:18:09,096 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:18:09,096 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:18:09,297 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:18:09,297 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:18:09,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:18:09,297 INFO L82 PathProgramCache]: Analyzing trace with hash 1653853746, now seen corresponding path program 47 times [2021-06-12 19:18:09,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:18:09,298 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704773253] [2021-06-12 19:18:09,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:18:09,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:18:09,340 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 24 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:18:09,340 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:18:09,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704773253] [2021-06-12 19:18:09,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704773253] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:18:09,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615583350] [2021-06-12 19:18:09,340 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-12 19:18:09,371 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-12 19:18:09,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:18:09,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-12 19:18:09,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:18:09,440 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 9 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:18:09,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [615583350] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:18:09,440 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:18:09,440 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 8 [2021-06-12 19:18:09,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569497032] [2021-06-12 19:18:09,440 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 19:18:09,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:18:09,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 19:18:09,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-06-12 19:18:09,441 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) [2021-06-12 19:18:09,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:18:09,609 INFO L93 Difference]: Finished difference Result 11705 states and 32668 transitions. [2021-06-12 19:18:09,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:18:09,610 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 [2021-06-12 19:18:09,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:18:09,626 INFO L225 Difference]: With dead ends: 11705 [2021-06-12 19:18:09,626 INFO L226 Difference]: Without dead ends: 11705 [2021-06-12 19:18:09,627 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 73.7ms TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:18:09,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11705 states. [2021-06-12 19:18:09,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11705 to 10573. [2021-06-12 19:18:09,756 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) [2021-06-12 19:18:09,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10573 states to 10573 states and 30204 transitions. [2021-06-12 19:18:09,773 INFO L78 Accepts]: Start accepts. Automaton has 10573 states and 30204 transitions. Word has length 32 [2021-06-12 19:18:09,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:18:09,773 INFO L482 AbstractCegarLoop]: Abstraction has 10573 states and 30204 transitions. [2021-06-12 19:18:09,773 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) [2021-06-12 19:18:09,774 INFO L276 IsEmpty]: Start isEmpty. Operand 10573 states and 30204 transitions. [2021-06-12 19:18:09,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-12 19:18:09,778 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:18:09,778 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:18:09,978 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-06-12 19:18:09,978 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:18:09,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:18:09,979 INFO L82 PathProgramCache]: Analyzing trace with hash 2101937765, now seen corresponding path program 48 times [2021-06-12 19:18:09,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:18:09,979 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406654457] [2021-06-12 19:18:09,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:18:09,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:18:10,022 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 25 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:18:10,022 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:18:10,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406654457] [2021-06-12 19:18:10,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406654457] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:18:10,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897228974] [2021-06-12 19:18:10,022 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 [2021-06-12 19:18:10,104 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-12 19:18:10,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:18:10,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-12 19:18:10,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:18:10,163 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 27 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:18:10,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1897228974] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:18:10,164 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:18:10,164 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 7 [2021-06-12 19:18:10,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752050246] [2021-06-12 19:18:10,164 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 19:18:10,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:18:10,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 19:18:10,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-12 19:18:10,165 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) [2021-06-12 19:18:10,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:18:10,336 INFO L93 Difference]: Finished difference Result 17407 states and 48712 transitions. [2021-06-12 19:18:10,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:18:10,337 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 [2021-06-12 19:18:10,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:18:10,364 INFO L225 Difference]: With dead ends: 17407 [2021-06-12 19:18:10,364 INFO L226 Difference]: Without dead ends: 17375 [2021-06-12 19:18:10,364 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 55.4ms TimeCoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:18:10,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17375 states. [2021-06-12 19:18:10,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17375 to 13902. [2021-06-12 19:18:10,604 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) [2021-06-12 19:18:10,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13902 states to 13902 states and 40270 transitions. [2021-06-12 19:18:10,631 INFO L78 Accepts]: Start accepts. Automaton has 13902 states and 40270 transitions. Word has length 32 [2021-06-12 19:18:10,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:18:10,632 INFO L482 AbstractCegarLoop]: Abstraction has 13902 states and 40270 transitions. [2021-06-12 19:18:10,632 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) [2021-06-12 19:18:10,632 INFO L276 IsEmpty]: Start isEmpty. Operand 13902 states and 40270 transitions. [2021-06-12 19:18:10,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-12 19:18:10,636 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:18:10,637 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:18:10,837 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-06-12 19:18:10,837 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:18:10,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:18:10,837 INFO L82 PathProgramCache]: Analyzing trace with hash 1480057355, now seen corresponding path program 49 times [2021-06-12 19:18:10,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:18:10,837 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672027599] [2021-06-12 19:18:10,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:18:10,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:18:10,878 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 24 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:18:10,879 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:18:10,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672027599] [2021-06-12 19:18:10,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672027599] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:18:10,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307926286] [2021-06-12 19:18:10,879 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 [2021-06-12 19:18:10,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:18:10,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-12 19:18:10,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:18:10,980 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 26 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:18:10,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307926286] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:18:10,980 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:18:10,980 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 7 [2021-06-12 19:18:10,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808535446] [2021-06-12 19:18:10,981 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 19:18:10,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:18:10,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 19:18:10,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-12 19:18:10,981 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) [2021-06-12 19:18:11,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:18:11,164 INFO L93 Difference]: Finished difference Result 17229 states and 47592 transitions. [2021-06-12 19:18:11,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:18:11,165 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 [2021-06-12 19:18:11,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:18:11,190 INFO L225 Difference]: With dead ends: 17229 [2021-06-12 19:18:11,190 INFO L226 Difference]: Without dead ends: 17226 [2021-06-12 19:18:11,191 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 65.6ms TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:18:11,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17226 states. [2021-06-12 19:18:11,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17226 to 13921. [2021-06-12 19:18:11,395 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) [2021-06-12 19:18:11,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13921 states to 13921 states and 40232 transitions. [2021-06-12 19:18:11,421 INFO L78 Accepts]: Start accepts. Automaton has 13921 states and 40232 transitions. Word has length 32 [2021-06-12 19:18:11,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:18:11,421 INFO L482 AbstractCegarLoop]: Abstraction has 13921 states and 40232 transitions. [2021-06-12 19:18:11,422 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) [2021-06-12 19:18:11,422 INFO L276 IsEmpty]: Start isEmpty. Operand 13921 states and 40232 transitions. [2021-06-12 19:18:11,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-12 19:18:11,426 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:18:11,426 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:18:11,628 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2021-06-12 19:18:11,629 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:18:11,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:18:11,629 INFO L82 PathProgramCache]: Analyzing trace with hash -157515101, now seen corresponding path program 50 times [2021-06-12 19:18:11,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:18:11,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475928576] [2021-06-12 19:18:11,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:18:11,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:18:11,675 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 25 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:18:11,675 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:18:11,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475928576] [2021-06-12 19:18:11,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475928576] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:18:11,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490776637] [2021-06-12 19:18:11,676 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-12 19:18:11,716 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:18:11,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:18:11,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-12 19:18:11,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:18:11,852 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 26 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:18:11,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [490776637] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:18:11,853 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:18:11,853 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 8 [2021-06-12 19:18:11,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339467487] [2021-06-12 19:18:11,853 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 19:18:11,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:18:11,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 19:18:11,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-06-12 19:18:11,854 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) [2021-06-12 19:18:12,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:18:12,068 INFO L93 Difference]: Finished difference Result 17332 states and 47741 transitions. [2021-06-12 19:18:12,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:18:12,068 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 [2021-06-12 19:18:12,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:18:12,095 INFO L225 Difference]: With dead ends: 17332 [2021-06-12 19:18:12,095 INFO L226 Difference]: Without dead ends: 17329 [2021-06-12 19:18:12,095 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 89.9ms TimeCoverageRelationStatistics Valid=81, Invalid=129, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:18:12,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17329 states. [2021-06-12 19:18:12,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17329 to 13802. [2021-06-12 19:18:12,305 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) [2021-06-12 19:18:12,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13802 states to 13802 states and 39790 transitions. [2021-06-12 19:18:12,332 INFO L78 Accepts]: Start accepts. Automaton has 13802 states and 39790 transitions. Word has length 32 [2021-06-12 19:18:12,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:18:12,332 INFO L482 AbstractCegarLoop]: Abstraction has 13802 states and 39790 transitions. [2021-06-12 19:18:12,332 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) [2021-06-12 19:18:12,332 INFO L276 IsEmpty]: Start isEmpty. Operand 13802 states and 39790 transitions. [2021-06-12 19:18:12,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-12 19:18:12,337 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:18:12,337 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:18:12,537 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2021-06-12 19:18:12,537 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:18:12,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:18:12,537 INFO L82 PathProgramCache]: Analyzing trace with hash 188377863, now seen corresponding path program 51 times [2021-06-12 19:18:12,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:18:12,538 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521344799] [2021-06-12 19:18:12,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:18:12,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:18:12,607 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 15 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:18:12,607 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:18:12,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521344799] [2021-06-12 19:18:12,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521344799] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:18:12,607 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753427091] [2021-06-12 19:18:12,607 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 [2021-06-12 19:18:12,636 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-12 19:18:12,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:18:12,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-12 19:18:12,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:18:12,826 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 20 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-06-12 19:18:12,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [753427091] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:18:12,826 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:18:12,826 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 16 [2021-06-12 19:18:12,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661245740] [2021-06-12 19:18:12,826 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:18:12,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:18:12,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:18:12,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:18:12,827 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) [2021-06-12 19:18:13,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:18:13,879 INFO L93 Difference]: Finished difference Result 22708 states and 63895 transitions. [2021-06-12 19:18:13,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-12 19:18:13,879 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 [2021-06-12 19:18:13,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:18:13,915 INFO L225 Difference]: With dead ends: 22708 [2021-06-12 19:18:13,915 INFO L226 Difference]: Without dead ends: 22654 [2021-06-12 19:18:13,916 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 728 ImplicationChecksByTransitivity, 802.8ms TimeCoverageRelationStatistics Valid=535, Invalid=1817, Unknown=0, NotChecked=0, Total=2352 [2021-06-12 19:18:13,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22654 states. [2021-06-12 19:18:14,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22654 to 15246. [2021-06-12 19:18:14,156 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) [2021-06-12 19:18:14,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15246 states to 15246 states and 43831 transitions. [2021-06-12 19:18:14,184 INFO L78 Accepts]: Start accepts. Automaton has 15246 states and 43831 transitions. Word has length 32 [2021-06-12 19:18:14,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:18:14,184 INFO L482 AbstractCegarLoop]: Abstraction has 15246 states and 43831 transitions. [2021-06-12 19:18:14,184 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) [2021-06-12 19:18:14,185 INFO L276 IsEmpty]: Start isEmpty. Operand 15246 states and 43831 transitions. [2021-06-12 19:18:14,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-12 19:18:14,191 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:18:14,191 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:18:14,391 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-06-12 19:18:14,391 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:18:14,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:18:14,391 INFO L82 PathProgramCache]: Analyzing trace with hash -639720651, now seen corresponding path program 9 times [2021-06-12 19:18:14,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:18:14,392 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154037099] [2021-06-12 19:18:14,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:18:14,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:18:14,468 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:18:14,468 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:18:14,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154037099] [2021-06-12 19:18:14,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154037099] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:18:14,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549719552] [2021-06-12 19:18:14,469 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 [2021-06-12 19:18:14,503 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-12 19:18:14,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:18:14,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-12 19:18:14,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:18:14,580 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:18:14,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1549719552] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:18:14,580 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:18:14,580 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-12 19:18:14,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027691621] [2021-06-12 19:18:14,581 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:18:14,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:18:14,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:18:14,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:18:14,581 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) [2021-06-12 19:18:14,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:18:14,966 INFO L93 Difference]: Finished difference Result 15940 states and 45262 transitions. [2021-06-12 19:18:14,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:18:14,966 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 [2021-06-12 19:18:14,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:18:15,071 INFO L225 Difference]: With dead ends: 15940 [2021-06-12 19:18:15,072 INFO L226 Difference]: Without dead ends: 15903 [2021-06-12 19:18:15,072 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 175.8ms TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:18:15,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15903 states. [2021-06-12 19:18:15,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15903 to 15141. [2021-06-12 19:18:15,339 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) [2021-06-12 19:18:15,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15141 states to 15141 states and 43547 transitions. [2021-06-12 19:18:15,373 INFO L78 Accepts]: Start accepts. Automaton has 15141 states and 43547 transitions. Word has length 35 [2021-06-12 19:18:15,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:18:15,373 INFO L482 AbstractCegarLoop]: Abstraction has 15141 states and 43547 transitions. [2021-06-12 19:18:15,373 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) [2021-06-12 19:18:15,373 INFO L276 IsEmpty]: Start isEmpty. Operand 15141 states and 43547 transitions. [2021-06-12 19:18:15,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-12 19:18:15,379 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:18:15,379 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:18:15,579 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:18:15,580 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:18:15,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:18:15,580 INFO L82 PathProgramCache]: Analyzing trace with hash 827459317, now seen corresponding path program 14 times [2021-06-12 19:18:15,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:18:15,580 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023840574] [2021-06-12 19:18:15,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:18:15,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:18:15,660 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:18:15,660 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:18:15,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023840574] [2021-06-12 19:18:15,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023840574] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:18:15,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249785082] [2021-06-12 19:18:15,660 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 [2021-06-12 19:18:15,684 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:18:15,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:18:15,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-12 19:18:15,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:18:15,852 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 7 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:18:15,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [249785082] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:18:15,853 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:18:15,853 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-06-12 19:18:15,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431390387] [2021-06-12 19:18:15,853 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:18:15,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:18:15,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:18:15,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:18:15,853 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) [2021-06-12 19:18:16,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:18:16,288 INFO L93 Difference]: Finished difference Result 15119 states and 43386 transitions. [2021-06-12 19:18:16,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:18:16,289 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 [2021-06-12 19:18:16,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:18:16,311 INFO L225 Difference]: With dead ends: 15119 [2021-06-12 19:18:16,311 INFO L226 Difference]: Without dead ends: 15016 [2021-06-12 19:18:16,311 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 122.1ms TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:18:16,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15016 states. [2021-06-12 19:18:16,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15016 to 14977. [2021-06-12 19:18:16,503 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) [2021-06-12 19:18:16,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14977 states to 14977 states and 43110 transitions. [2021-06-12 19:18:16,531 INFO L78 Accepts]: Start accepts. Automaton has 14977 states and 43110 transitions. Word has length 35 [2021-06-12 19:18:16,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:18:16,531 INFO L482 AbstractCegarLoop]: Abstraction has 14977 states and 43110 transitions. [2021-06-12 19:18:16,532 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) [2021-06-12 19:18:16,532 INFO L276 IsEmpty]: Start isEmpty. Operand 14977 states and 43110 transitions. [2021-06-12 19:18:16,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-12 19:18:16,538 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:18:16,538 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:18:16,740 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-06-12 19:18:16,741 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:18:16,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:18:16,741 INFO L82 PathProgramCache]: Analyzing trace with hash 999532737, now seen corresponding path program 15 times [2021-06-12 19:18:16,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:18:16,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142467448] [2021-06-12 19:18:16,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:18:16,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:18:16,818 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:18:16,818 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:18:16,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142467448] [2021-06-12 19:18:16,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142467448] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:18:16,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163968975] [2021-06-12 19:18:16,819 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 [2021-06-12 19:18:16,852 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-12 19:18:16,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:18:16,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-12 19:18:16,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:18:16,914 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:18:16,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1163968975] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:18:16,914 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:18:16,914 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-06-12 19:18:16,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225296322] [2021-06-12 19:18:16,914 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 19:18:16,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:18:16,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 19:18:16,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-06-12 19:18:16,915 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) [2021-06-12 19:18:17,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:18:17,150 INFO L93 Difference]: Finished difference Result 15202 states and 43548 transitions. [2021-06-12 19:18:17,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:18:17,150 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 [2021-06-12 19:18:17,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:18:17,172 INFO L225 Difference]: With dead ends: 15202 [2021-06-12 19:18:17,172 INFO L226 Difference]: Without dead ends: 15202 [2021-06-12 19:18:17,172 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 83.6ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:18:17,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15202 states. [2021-06-12 19:18:17,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15202 to 14977. [2021-06-12 19:18:17,362 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) [2021-06-12 19:18:17,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14977 states to 14977 states and 43110 transitions. [2021-06-12 19:18:17,390 INFO L78 Accepts]: Start accepts. Automaton has 14977 states and 43110 transitions. Word has length 35 [2021-06-12 19:18:17,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:18:17,390 INFO L482 AbstractCegarLoop]: Abstraction has 14977 states and 43110 transitions. [2021-06-12 19:18:17,390 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) [2021-06-12 19:18:17,390 INFO L276 IsEmpty]: Start isEmpty. Operand 14977 states and 43110 transitions. [2021-06-12 19:18:17,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-12 19:18:17,396 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:18:17,396 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:18:17,596 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:18:17,596 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:18:17,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:18:17,597 INFO L82 PathProgramCache]: Analyzing trace with hash -1845490552, now seen corresponding path program 10 times [2021-06-12 19:18:17,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:18:17,597 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76807630] [2021-06-12 19:18:17,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:18:17,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:18:17,679 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 27 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:18:17,679 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:18:17,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76807630] [2021-06-12 19:18:17,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76807630] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:18:17,679 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451869992] [2021-06-12 19:18:17,679 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 [2021-06-12 19:18:17,707 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:18:17,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:18:17,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 19:18:17,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:18:17,786 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 27 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:18:17,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1451869992] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:18:17,786 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:18:17,786 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 11 [2021-06-12 19:18:17,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273892772] [2021-06-12 19:18:17,787 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 19:18:17,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:18:17,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 19:18:17,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:18:17,787 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) [2021-06-12 19:18:18,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:18:18,026 INFO L93 Difference]: Finished difference Result 16718 states and 46945 transitions. [2021-06-12 19:18:18,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:18:18,027 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 [2021-06-12 19:18:18,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:18:18,060 INFO L225 Difference]: With dead ends: 16718 [2021-06-12 19:18:18,060 INFO L226 Difference]: Without dead ends: 16694 [2021-06-12 19:18:18,060 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 108.7ms TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:18:18,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16694 states. [2021-06-12 19:18:18,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16694 to 15013. [2021-06-12 19:18:18,276 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) [2021-06-12 19:18:18,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15013 states to 15013 states and 43172 transitions. [2021-06-12 19:18:18,305 INFO L78 Accepts]: Start accepts. Automaton has 15013 states and 43172 transitions. Word has length 35 [2021-06-12 19:18:18,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:18:18,305 INFO L482 AbstractCegarLoop]: Abstraction has 15013 states and 43172 transitions. [2021-06-12 19:18:18,306 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) [2021-06-12 19:18:18,306 INFO L276 IsEmpty]: Start isEmpty. Operand 15013 states and 43172 transitions. [2021-06-12 19:18:18,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-12 19:18:18,312 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:18:18,312 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:18:18,512 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:18:18,512 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:18:18,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:18:18,513 INFO L82 PathProgramCache]: Analyzing trace with hash -731106251, now seen corresponding path program 16 times [2021-06-12 19:18:18,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:18:18,513 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987925731] [2021-06-12 19:18:18,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:18:18,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:18:18,574 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 12 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:18:18,574 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:18:18,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987925731] [2021-06-12 19:18:18,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987925731] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:18:18,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1442456788] [2021-06-12 19:18:18,575 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 [2021-06-12 19:18:18,606 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:18:18,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:18:18,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-12 19:18:18,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:18:18,759 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 7 proven. 31 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:18:18,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1442456788] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:18:18,760 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:18:18,760 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-06-12 19:18:18,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456084586] [2021-06-12 19:18:18,760 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 19:18:18,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:18:18,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 19:18:18,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-06-12 19:18:18,760 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) [2021-06-12 19:18:19,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:18:19,038 INFO L93 Difference]: Finished difference Result 15432 states and 43972 transitions. [2021-06-12 19:18:19,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:18:19,039 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 [2021-06-12 19:18:19,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:18:19,061 INFO L225 Difference]: With dead ends: 15432 [2021-06-12 19:18:19,061 INFO L226 Difference]: Without dead ends: 15289 [2021-06-12 19:18:19,061 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 75.9ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:18:19,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15289 states. [2021-06-12 19:18:19,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15289 to 14996. [2021-06-12 19:18:19,257 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) [2021-06-12 19:18:19,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14996 states to 14996 states and 42939 transitions. [2021-06-12 19:18:19,285 INFO L78 Accepts]: Start accepts. Automaton has 14996 states and 42939 transitions. Word has length 35 [2021-06-12 19:18:19,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:18:19,285 INFO L482 AbstractCegarLoop]: Abstraction has 14996 states and 42939 transitions. [2021-06-12 19:18:19,285 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) [2021-06-12 19:18:19,285 INFO L276 IsEmpty]: Start isEmpty. Operand 14996 states and 42939 transitions. [2021-06-12 19:18:19,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-12 19:18:19,292 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:18:19,292 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:18:19,492 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2021-06-12 19:18:19,492 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:18:19,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:18:19,493 INFO L82 PathProgramCache]: Analyzing trace with hash -1344642431, now seen corresponding path program 17 times [2021-06-12 19:18:19,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:18:19,493 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326215018] [2021-06-12 19:18:19,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:18:19,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:18:19,549 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 27 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-12 19:18:19,549 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:18:19,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326215018] [2021-06-12 19:18:19,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326215018] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:18:19,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661236219] [2021-06-12 19:18:19,549 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 [2021-06-12 19:18:19,577 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-12 19:18:19,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:18:19,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-12 19:18:19,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:18:19,645 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-12 19:18:19,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1661236219] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:18:19,645 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:18:19,645 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-06-12 19:18:19,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720166814] [2021-06-12 19:18:19,645 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 19:18:19,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:18:19,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 19:18:19,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-06-12 19:18:19,646 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) [2021-06-12 19:18:19,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:18:19,846 INFO L93 Difference]: Finished difference Result 15805 states and 44721 transitions. [2021-06-12 19:18:19,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:18:19,846 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 [2021-06-12 19:18:19,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:18:19,869 INFO L225 Difference]: With dead ends: 15805 [2021-06-12 19:18:19,869 INFO L226 Difference]: Without dead ends: 15793 [2021-06-12 19:18:19,869 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 70.3ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:18:19,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15793 states. [2021-06-12 19:18:20,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15793 to 15263. [2021-06-12 19:18:20,064 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) [2021-06-12 19:18:20,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15263 states to 15263 states and 43599 transitions. [2021-06-12 19:18:20,191 INFO L78 Accepts]: Start accepts. Automaton has 15263 states and 43599 transitions. Word has length 35 [2021-06-12 19:18:20,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:18:20,191 INFO L482 AbstractCegarLoop]: Abstraction has 15263 states and 43599 transitions. [2021-06-12 19:18:20,191 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) [2021-06-12 19:18:20,192 INFO L276 IsEmpty]: Start isEmpty. Operand 15263 states and 43599 transitions. [2021-06-12 19:18:20,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-12 19:18:20,197 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:18:20,197 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:18:20,398 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2021-06-12 19:18:20,398 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:18:20,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:18:20,398 INFO L82 PathProgramCache]: Analyzing trace with hash 797274903, now seen corresponding path program 18 times [2021-06-12 19:18:20,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:18:20,398 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028382049] [2021-06-12 19:18:20,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:18:20,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:18:20,459 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:18:20,459 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:18:20,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028382049] [2021-06-12 19:18:20,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028382049] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:18:20,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115861474] [2021-06-12 19:18:20,459 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 [2021-06-12 19:18:20,616 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-12 19:18:20,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:18:20,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-12 19:18:20,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:18:20,673 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:18:20,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [115861474] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:18:20,674 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:18:20,674 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-12 19:18:20,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452650091] [2021-06-12 19:18:20,674 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 19:18:20,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:18:20,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 19:18:20,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-06-12 19:18:20,674 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) [2021-06-12 19:18:20,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:18:20,938 INFO L93 Difference]: Finished difference Result 16259 states and 45639 transitions. [2021-06-12 19:18:20,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:18:20,938 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 [2021-06-12 19:18:20,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:18:20,961 INFO L225 Difference]: With dead ends: 16259 [2021-06-12 19:18:20,961 INFO L226 Difference]: Without dead ends: 16247 [2021-06-12 19:18:20,961 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 97.0ms TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:18:20,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16247 states. [2021-06-12 19:18:21,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16247 to 14972. [2021-06-12 19:18:21,197 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) [2021-06-12 19:18:21,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14972 states to 14972 states and 42737 transitions. [2021-06-12 19:18:21,232 INFO L78 Accepts]: Start accepts. Automaton has 14972 states and 42737 transitions. Word has length 35 [2021-06-12 19:18:21,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:18:21,233 INFO L482 AbstractCegarLoop]: Abstraction has 14972 states and 42737 transitions. [2021-06-12 19:18:21,233 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) [2021-06-12 19:18:21,233 INFO L276 IsEmpty]: Start isEmpty. Operand 14972 states and 42737 transitions. [2021-06-12 19:18:21,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-12 19:18:21,239 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:18:21,239 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:18:21,440 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:18:21,441 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:18:21,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:18:21,441 INFO L82 PathProgramCache]: Analyzing trace with hash -1965133284, now seen corresponding path program 19 times [2021-06-12 19:18:21,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:18:21,441 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428318126] [2021-06-12 19:18:21,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:18:21,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:18:21,509 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 19 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:18:21,509 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:18:21,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428318126] [2021-06-12 19:18:21,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428318126] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:18:21,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523810704] [2021-06-12 19:18:21,510 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 [2021-06-12 19:18:21,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:18:21,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 19:18:21,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:18:21,614 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 19 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:18:21,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [523810704] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:18:21,614 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:18:21,614 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-06-12 19:18:21,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257561810] [2021-06-12 19:18:21,615 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 19:18:21,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:18:21,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 19:18:21,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-06-12 19:18:21,615 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) [2021-06-12 19:18:21,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:18:21,791 INFO L93 Difference]: Finished difference Result 15256 states and 43217 transitions. [2021-06-12 19:18:21,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:18:21,791 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 [2021-06-12 19:18:21,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:18:21,814 INFO L225 Difference]: With dead ends: 15256 [2021-06-12 19:18:21,814 INFO L226 Difference]: Without dead ends: 15235 [2021-06-12 19:18:21,815 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 68.2ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:18:21,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15235 states. [2021-06-12 19:18:21,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15235 to 14340. [2021-06-12 19:18:22,012 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) [2021-06-12 19:18:22,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14340 states to 14340 states and 41025 transitions. [2021-06-12 19:18:22,042 INFO L78 Accepts]: Start accepts. Automaton has 14340 states and 41025 transitions. Word has length 35 [2021-06-12 19:18:22,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:18:22,042 INFO L482 AbstractCegarLoop]: Abstraction has 14340 states and 41025 transitions. [2021-06-12 19:18:22,042 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) [2021-06-12 19:18:22,042 INFO L276 IsEmpty]: Start isEmpty. Operand 14340 states and 41025 transitions. [2021-06-12 19:18:22,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-12 19:18:22,048 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:18:22,048 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:18:22,248 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-06-12 19:18:22,249 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:18:22,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:18:22,249 INFO L82 PathProgramCache]: Analyzing trace with hash -729647013, now seen corresponding path program 11 times [2021-06-12 19:18:22,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:18:22,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609311209] [2021-06-12 19:18:22,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:18:22,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:18:22,313 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 33 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:18:22,314 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:18:22,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609311209] [2021-06-12 19:18:22,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609311209] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:18:22,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113627700] [2021-06-12 19:18:22,314 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-12 19:18:22,348 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-12 19:18:22,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:18:22,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-12 19:18:22,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:18:22,412 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 34 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:18:22,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [113627700] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:18:22,413 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:18:22,413 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-06-12 19:18:22,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308088884] [2021-06-12 19:18:22,413 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 19:18:22,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:18:22,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 19:18:22,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-06-12 19:18:22,413 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) [2021-06-12 19:18:22,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:18:22,629 INFO L93 Difference]: Finished difference Result 15289 states and 42956 transitions. [2021-06-12 19:18:22,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:18:22,630 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 [2021-06-12 19:18:22,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:18:22,653 INFO L225 Difference]: With dead ends: 15289 [2021-06-12 19:18:22,653 INFO L226 Difference]: Without dead ends: 15273 [2021-06-12 19:18:22,653 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 80.4ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:18:22,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15273 states. [2021-06-12 19:18:22,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15273 to 14606. [2021-06-12 19:18:22,830 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) [2021-06-12 19:18:22,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14606 states to 14606 states and 41593 transitions. [2021-06-12 19:18:22,858 INFO L78 Accepts]: Start accepts. Automaton has 14606 states and 41593 transitions. Word has length 35 [2021-06-12 19:18:22,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:18:22,858 INFO L482 AbstractCegarLoop]: Abstraction has 14606 states and 41593 transitions. [2021-06-12 19:18:22,858 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) [2021-06-12 19:18:22,858 INFO L276 IsEmpty]: Start isEmpty. Operand 14606 states and 41593 transitions. [2021-06-12 19:18:22,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-12 19:18:22,953 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:18:22,953 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:18:23,153 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:18:23,153 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:18:23,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:18:23,154 INFO L82 PathProgramCache]: Analyzing trace with hash 770685979, now seen corresponding path program 20 times [2021-06-12 19:18:23,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:18:23,154 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374654673] [2021-06-12 19:18:23,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:18:23,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:18:23,222 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 12 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:18:23,222 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:18:23,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374654673] [2021-06-12 19:18:23,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374654673] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:18:23,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1744664830] [2021-06-12 19:18:23,222 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 [2021-06-12 19:18:23,247 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:18:23,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:18:23,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-12 19:18:23,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:18:23,315 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 7 proven. 31 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:18:23,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1744664830] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:18:23,315 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:18:23,315 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-06-12 19:18:23,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080620550] [2021-06-12 19:18:23,316 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 19:18:23,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:18:23,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 19:18:23,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-06-12 19:18:23,316 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) [2021-06-12 19:18:23,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:18:23,574 INFO L93 Difference]: Finished difference Result 14012 states and 39306 transitions. [2021-06-12 19:18:23,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:18:23,575 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 [2021-06-12 19:18:23,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:18:23,594 INFO L225 Difference]: With dead ends: 14012 [2021-06-12 19:18:23,594 INFO L226 Difference]: Without dead ends: 13783 [2021-06-12 19:18:23,594 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 68.8ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:18:23,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13783 states. [2021-06-12 19:18:23,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13783 to 13424. [2021-06-12 19:18:23,772 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) [2021-06-12 19:18:23,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13424 states to 13424 states and 37606 transitions. [2021-06-12 19:18:23,796 INFO L78 Accepts]: Start accepts. Automaton has 13424 states and 37606 transitions. Word has length 35 [2021-06-12 19:18:23,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:18:23,796 INFO L482 AbstractCegarLoop]: Abstraction has 13424 states and 37606 transitions. [2021-06-12 19:18:23,796 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) [2021-06-12 19:18:23,796 INFO L276 IsEmpty]: Start isEmpty. Operand 13424 states and 37606 transitions. [2021-06-12 19:18:23,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-12 19:18:23,801 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:18:23,801 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:18:24,002 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:18:24,002 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:18:24,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:18:24,002 INFO L82 PathProgramCache]: Analyzing trace with hash -1491207704, now seen corresponding path program 21 times [2021-06-12 19:18:24,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:18:24,002 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207294166] [2021-06-12 19:18:24,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:18:24,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:18:24,058 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 14 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:18:24,059 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:18:24,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207294166] [2021-06-12 19:18:24,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207294166] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:18:24,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19027358] [2021-06-12 19:18:24,059 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 [2021-06-12 19:18:24,090 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-12 19:18:24,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:18:24,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 19:18:24,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:18:24,152 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 14 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:18:24,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [19027358] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:18:24,152 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:18:24,152 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-12 19:18:24,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026729605] [2021-06-12 19:18:24,153 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 19:18:24,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:18:24,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 19:18:24,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-06-12 19:18:24,153 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) [2021-06-12 19:18:24,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:18:24,306 INFO L93 Difference]: Finished difference Result 14007 states and 38649 transitions. [2021-06-12 19:18:24,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:18:24,306 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 [2021-06-12 19:18:24,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:18:24,324 INFO L225 Difference]: With dead ends: 14007 [2021-06-12 19:18:24,324 INFO L226 Difference]: Without dead ends: 13986 [2021-06-12 19:18:24,324 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 56.8ms TimeCoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:18:24,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13986 states. [2021-06-12 19:18:24,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13986 to 13395. [2021-06-12 19:18:24,498 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) [2021-06-12 19:18:24,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13395 states to 13395 states and 37421 transitions. [2021-06-12 19:18:24,524 INFO L78 Accepts]: Start accepts. Automaton has 13395 states and 37421 transitions. Word has length 35 [2021-06-12 19:18:24,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:18:24,525 INFO L482 AbstractCegarLoop]: Abstraction has 13395 states and 37421 transitions. [2021-06-12 19:18:24,525 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) [2021-06-12 19:18:24,525 INFO L276 IsEmpty]: Start isEmpty. Operand 13395 states and 37421 transitions. [2021-06-12 19:18:24,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-12 19:18:24,530 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:18:24,530 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:18:24,730 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:18:24,731 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:18:24,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:18:24,731 INFO L82 PathProgramCache]: Analyzing trace with hash -463341054, now seen corresponding path program 22 times [2021-06-12 19:18:24,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:18:24,731 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529060786] [2021-06-12 19:18:24,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:18:24,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:18:24,781 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 13 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:18:24,781 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:18:24,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529060786] [2021-06-12 19:18:24,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529060786] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:18:24,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115741780] [2021-06-12 19:18:24,782 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 [2021-06-12 19:18:24,816 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:18:24,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:18:24,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 19:18:24,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:18:24,878 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 13 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:18:24,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2115741780] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:18:24,878 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:18:24,878 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-06-12 19:18:24,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963391025] [2021-06-12 19:18:24,878 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 19:18:24,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:18:24,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 19:18:24,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-06-12 19:18:24,879 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) [2021-06-12 19:18:25,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:18:25,035 INFO L93 Difference]: Finished difference Result 13987 states and 38480 transitions. [2021-06-12 19:18:25,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:18:25,035 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 [2021-06-12 19:18:25,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:18:25,051 INFO L225 Difference]: With dead ends: 13987 [2021-06-12 19:18:25,052 INFO L226 Difference]: Without dead ends: 13963 [2021-06-12 19:18:25,052 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 69.5ms TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:18:25,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13963 states. [2021-06-12 19:18:25,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13963 to 12486. [2021-06-12 19:18:25,191 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) [2021-06-12 19:18:25,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12486 states to 12486 states and 34893 transitions. [2021-06-12 19:18:25,295 INFO L78 Accepts]: Start accepts. Automaton has 12486 states and 34893 transitions. Word has length 35 [2021-06-12 19:18:25,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:18:25,295 INFO L482 AbstractCegarLoop]: Abstraction has 12486 states and 34893 transitions. [2021-06-12 19:18:25,295 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) [2021-06-12 19:18:25,295 INFO L276 IsEmpty]: Start isEmpty. Operand 12486 states and 34893 transitions. [2021-06-12 19:18:25,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-12 19:18:25,299 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:18:25,299 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:18:25,500 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2021-06-12 19:18:25,500 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:18:25,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:18:25,500 INFO L82 PathProgramCache]: Analyzing trace with hash -1841063629, now seen corresponding path program 23 times [2021-06-12 19:18:25,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:18:25,500 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600544020] [2021-06-12 19:18:25,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:18:25,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:18:25,564 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:18:25,564 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:18:25,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600544020] [2021-06-12 19:18:25,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1600544020] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:18:25,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855133887] [2021-06-12 19:18:25,565 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 [2021-06-12 19:18:25,592 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-06-12 19:18:25,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:18:25,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-12 19:18:25,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:18:25,645 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:18:25,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [855133887] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:18:25,646 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:18:25,646 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-12 19:18:25,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651759954] [2021-06-12 19:18:25,646 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 19:18:25,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:18:25,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 19:18:25,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:18:25,646 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) [2021-06-12 19:18:25,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:18:25,925 INFO L93 Difference]: Finished difference Result 12918 states and 35022 transitions. [2021-06-12 19:18:25,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:18:25,925 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 [2021-06-12 19:18:25,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:18:25,945 INFO L225 Difference]: With dead ends: 12918 [2021-06-12 19:18:25,946 INFO L226 Difference]: Without dead ends: 12852 [2021-06-12 19:18:25,946 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 119.0ms TimeCoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:18:25,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12852 states. [2021-06-12 19:18:26,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12852 to 9736. [2021-06-12 19:18:26,087 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) [2021-06-12 19:18:26,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9736 states to 9736 states and 27132 transitions. [2021-06-12 19:18:26,105 INFO L78 Accepts]: Start accepts. Automaton has 9736 states and 27132 transitions. Word has length 35 [2021-06-12 19:18:26,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:18:26,105 INFO L482 AbstractCegarLoop]: Abstraction has 9736 states and 27132 transitions. [2021-06-12 19:18:26,105 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) [2021-06-12 19:18:26,105 INFO L276 IsEmpty]: Start isEmpty. Operand 9736 states and 27132 transitions. [2021-06-12 19:18:26,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-12 19:18:26,109 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:18:26,109 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:18:26,309 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:18:26,310 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:18:26,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:18:26,310 INFO L82 PathProgramCache]: Analyzing trace with hash -1454460952, now seen corresponding path program 24 times [2021-06-12 19:18:26,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:18:26,310 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650972766] [2021-06-12 19:18:26,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:18:26,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:18:26,373 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 18 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:18:26,373 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:18:26,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650972766] [2021-06-12 19:18:26,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650972766] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:18:26,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038022228] [2021-06-12 19:18:26,373 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 [2021-06-12 19:18:26,414 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-12 19:18:26,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:18:26,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 19:18:26,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:18:26,471 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 18 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:18:26,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2038022228] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:18:26,472 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:18:26,472 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-12 19:18:26,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280778397] [2021-06-12 19:18:26,472 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 19:18:26,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:18:26,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 19:18:26,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:18:26,472 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) [2021-06-12 19:18:26,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:18:26,653 INFO L93 Difference]: Finished difference Result 10128 states and 27807 transitions. [2021-06-12 19:18:26,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:18:26,653 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 [2021-06-12 19:18:26,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:18:26,666 INFO L225 Difference]: With dead ends: 10128 [2021-06-12 19:18:26,666 INFO L226 Difference]: Without dead ends: 10101 [2021-06-12 19:18:26,667 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 91.0ms TimeCoverageRelationStatistics Valid=76, Invalid=134, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:18:26,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10101 states. [2021-06-12 19:18:26,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10101 to 9757. [2021-06-12 19:18:26,780 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) [2021-06-12 19:18:26,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9757 states to 9757 states and 27131 transitions. [2021-06-12 19:18:26,796 INFO L78 Accepts]: Start accepts. Automaton has 9757 states and 27131 transitions. Word has length 35 [2021-06-12 19:18:26,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:18:26,796 INFO L482 AbstractCegarLoop]: Abstraction has 9757 states and 27131 transitions. [2021-06-12 19:18:26,796 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) [2021-06-12 19:18:26,796 INFO L276 IsEmpty]: Start isEmpty. Operand 9757 states and 27131 transitions. [2021-06-12 19:18:26,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-12 19:18:26,805 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:18:26,805 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:18:27,028 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable161 [2021-06-12 19:18:27,028 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:18:27,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:18:27,028 INFO L82 PathProgramCache]: Analyzing trace with hash -208710795, now seen corresponding path program 12 times [2021-06-12 19:18:27,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:18:27,029 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485754745] [2021-06-12 19:18:27,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:18:27,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:18:27,098 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 35 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:18:27,098 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:18:27,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485754745] [2021-06-12 19:18:27,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485754745] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:18:27,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776443366] [2021-06-12 19:18:27,098 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 [2021-06-12 19:18:27,142 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-12 19:18:27,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:18:27,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-12 19:18:27,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:18:27,203 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 35 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:18:27,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1776443366] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:18:27,203 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:18:27,203 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-12 19:18:27,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973021548] [2021-06-12 19:18:27,204 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 19:18:27,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:18:27,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 19:18:27,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:18:27,205 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) [2021-06-12 19:18:27,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:18:27,479 INFO L93 Difference]: Finished difference Result 10449 states and 28483 transitions. [2021-06-12 19:18:27,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:18:27,480 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 [2021-06-12 19:18:27,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:18:27,498 INFO L225 Difference]: With dead ends: 10449 [2021-06-12 19:18:27,498 INFO L226 Difference]: Without dead ends: 10431 [2021-06-12 19:18:27,498 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 133.1ms TimeCoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:18:27,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10431 states. [2021-06-12 19:18:27,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10431 to 9155. [2021-06-12 19:18:27,652 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) [2021-06-12 19:18:27,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9155 states to 9155 states and 25602 transitions. [2021-06-12 19:18:27,675 INFO L78 Accepts]: Start accepts. Automaton has 9155 states and 25602 transitions. Word has length 35 [2021-06-12 19:18:27,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:18:27,675 INFO L482 AbstractCegarLoop]: Abstraction has 9155 states and 25602 transitions. [2021-06-12 19:18:27,675 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) [2021-06-12 19:18:27,675 INFO L276 IsEmpty]: Start isEmpty. Operand 9155 states and 25602 transitions. [2021-06-12 19:18:27,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-12 19:18:27,680 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:18:27,680 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:18:27,892 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2021-06-12 19:18:27,893 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:18:27,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:18:27,893 INFO L82 PathProgramCache]: Analyzing trace with hash -305893054, now seen corresponding path program 25 times [2021-06-12 19:18:27,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:18:27,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083274192] [2021-06-12 19:18:27,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:18:27,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:18:27,900 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-06-12 19:18:27,900 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:18:27,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083274192] [2021-06-12 19:18:27,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083274192] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-12 19:18:27,901 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-12 19:18:27,901 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-12 19:18:27,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124487233] [2021-06-12 19:18:27,901 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-12 19:18:27,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:18:27,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-12 19:18:27,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-12 19:18:27,902 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) [2021-06-12 19:18:27,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:18:27,912 INFO L93 Difference]: Finished difference Result 2349 states and 5506 transitions. [2021-06-12 19:18:27,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-12 19:18:27,912 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 [2021-06-12 19:18:27,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:18:27,914 INFO L225 Difference]: With dead ends: 2349 [2021-06-12 19:18:27,914 INFO L226 Difference]: Without dead ends: 2331 [2021-06-12 19:18:27,914 INFO L728 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 [2021-06-12 19:18:27,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2331 states. [2021-06-12 19:18:27,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2331 to 1380. [2021-06-12 19:18:27,926 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) [2021-06-12 19:18:27,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1380 states to 1380 states and 3219 transitions. [2021-06-12 19:18:27,928 INFO L78 Accepts]: Start accepts. Automaton has 1380 states and 3219 transitions. Word has length 35 [2021-06-12 19:18:27,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:18:27,928 INFO L482 AbstractCegarLoop]: Abstraction has 1380 states and 3219 transitions. [2021-06-12 19:18:27,928 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) [2021-06-12 19:18:27,928 INFO L276 IsEmpty]: Start isEmpty. Operand 1380 states and 3219 transitions. [2021-06-12 19:18:27,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-12 19:18:27,929 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:18:27,929 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:18:27,929 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167 [2021-06-12 19:18:27,929 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:18:27,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:18:27,930 INFO L82 PathProgramCache]: Analyzing trace with hash -385601739, now seen corresponding path program 26 times [2021-06-12 19:18:27,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:18:27,930 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513021806] [2021-06-12 19:18:27,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:18:27,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:18:27,996 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 10 proven. 29 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:18:27,996 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:18:27,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513021806] [2021-06-12 19:18:27,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513021806] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:18:27,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785372440] [2021-06-12 19:18:27,996 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 [2021-06-12 19:18:28,021 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:18:28,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:18:28,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-12 19:18:28,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:18:28,157 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 7 proven. 32 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:18:28,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1785372440] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:18:28,157 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:18:28,157 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-06-12 19:18:28,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580741609] [2021-06-12 19:18:28,158 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 19:18:28,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:18:28,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 19:18:28,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:18:28,158 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) [2021-06-12 19:18:28,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:18:28,353 INFO L93 Difference]: Finished difference Result 1429 states and 3294 transitions. [2021-06-12 19:18:28,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:18:28,354 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 [2021-06-12 19:18:28,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:18:28,355 INFO L225 Difference]: With dead ends: 1429 [2021-06-12 19:18:28,355 INFO L226 Difference]: Without dead ends: 1397 [2021-06-12 19:18:28,355 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 84.8ms TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:18:28,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1397 states. [2021-06-12 19:18:28,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1397 to 1380. [2021-06-12 19:18:28,365 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) [2021-06-12 19:18:28,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1380 states to 1380 states and 3213 transitions. [2021-06-12 19:18:28,366 INFO L78 Accepts]: Start accepts. Automaton has 1380 states and 3213 transitions. Word has length 35 [2021-06-12 19:18:28,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:18:28,367 INFO L482 AbstractCegarLoop]: Abstraction has 1380 states and 3213 transitions. [2021-06-12 19:18:28,367 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) [2021-06-12 19:18:28,367 INFO L276 IsEmpty]: Start isEmpty. Operand 1380 states and 3213 transitions. [2021-06-12 19:18:28,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-12 19:18:28,368 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:18:28,368 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:18:28,572 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2021-06-12 19:18:28,573 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:18:28,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:18:28,573 INFO L82 PathProgramCache]: Analyzing trace with hash 1551170986, now seen corresponding path program 27 times [2021-06-12 19:18:28,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:18:28,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513363512] [2021-06-12 19:18:28,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:18:28,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:18:28,625 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:18:28,625 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:18:28,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513363512] [2021-06-12 19:18:28,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513363512] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:18:28,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059889203] [2021-06-12 19:18:28,625 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 [2021-06-12 19:18:28,659 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-12 19:18:28,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:18:28,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 19:18:28,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:18:28,720 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:18:28,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2059889203] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:18:28,721 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:18:28,721 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-06-12 19:18:28,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295054660] [2021-06-12 19:18:28,721 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 19:18:28,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:18:28,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 19:18:28,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-06-12 19:18:28,721 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) [2021-06-12 19:18:28,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:18:28,875 INFO L93 Difference]: Finished difference Result 2071 states and 4706 transitions. [2021-06-12 19:18:28,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:18:28,875 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 [2021-06-12 19:18:28,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:18:28,877 INFO L225 Difference]: With dead ends: 2071 [2021-06-12 19:18:28,877 INFO L226 Difference]: Without dead ends: 2071 [2021-06-12 19:18:28,877 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 68.1ms TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:18:28,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2071 states. [2021-06-12 19:18:28,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2071 to 1527. [2021-06-12 19:18:28,890 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) [2021-06-12 19:18:28,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1527 states to 1527 states and 3666 transitions. [2021-06-12 19:18:28,891 INFO L78 Accepts]: Start accepts. Automaton has 1527 states and 3666 transitions. Word has length 35 [2021-06-12 19:18:28,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:18:28,892 INFO L482 AbstractCegarLoop]: Abstraction has 1527 states and 3666 transitions. [2021-06-12 19:18:28,892 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) [2021-06-12 19:18:28,892 INFO L276 IsEmpty]: Start isEmpty. Operand 1527 states and 3666 transitions. [2021-06-12 19:18:28,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-12 19:18:28,893 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:18:28,893 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:18:29,098 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable169,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:18:29,098 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:18:29,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:18:29,099 INFO L82 PathProgramCache]: Analyzing trace with hash 780335319, now seen corresponding path program 13 times [2021-06-12 19:18:29,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:18:29,099 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106624685] [2021-06-12 19:18:29,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:18:29,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:18:29,163 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 35 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:18:29,163 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:18:29,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106624685] [2021-06-12 19:18:29,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106624685] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:18:29,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334437721] [2021-06-12 19:18:29,164 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 [2021-06-12 19:18:29,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:18:29,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-12 19:18:29,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:18:29,244 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 35 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:18:29,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [334437721] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:18:29,244 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:18:29,244 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-12 19:18:29,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748424627] [2021-06-12 19:18:29,244 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 19:18:29,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:18:29,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 19:18:29,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-06-12 19:18:29,245 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) [2021-06-12 19:18:29,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:18:29,425 INFO L93 Difference]: Finished difference Result 1909 states and 4411 transitions. [2021-06-12 19:18:29,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:18:29,425 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 [2021-06-12 19:18:29,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:18:29,427 INFO L225 Difference]: With dead ends: 1909 [2021-06-12 19:18:29,427 INFO L226 Difference]: Without dead ends: 1905 [2021-06-12 19:18:29,427 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 93.2ms TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:18:29,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1905 states. [2021-06-12 19:18:29,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1905 to 1526. [2021-06-12 19:18:29,438 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) [2021-06-12 19:18:29,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1526 states to 1526 states and 3665 transitions. [2021-06-12 19:18:29,440 INFO L78 Accepts]: Start accepts. Automaton has 1526 states and 3665 transitions. Word has length 35 [2021-06-12 19:18:29,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:18:29,440 INFO L482 AbstractCegarLoop]: Abstraction has 1526 states and 3665 transitions. [2021-06-12 19:18:29,440 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) [2021-06-12 19:18:29,440 INFO L276 IsEmpty]: Start isEmpty. Operand 1526 states and 3665 transitions. [2021-06-12 19:18:29,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-12 19:18:29,441 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:18:29,441 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:18:29,642 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:18:29,642 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:18:29,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:18:29,642 INFO L82 PathProgramCache]: Analyzing trace with hash -852961065, now seen corresponding path program 28 times [2021-06-12 19:18:29,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:18:29,642 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642060405] [2021-06-12 19:18:29,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:18:29,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:18:29,705 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 10 proven. 29 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:18:29,705 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:18:29,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642060405] [2021-06-12 19:18:29,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642060405] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:18:29,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148307803] [2021-06-12 19:18:29,705 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 [2021-06-12 19:18:29,729 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:18:29,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:18:29,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-12 19:18:29,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:18:29,849 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 7 proven. 32 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:18:29,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1148307803] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:18:29,849 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:18:29,849 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-12 19:18:29,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823848960] [2021-06-12 19:18:29,849 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 19:18:29,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:18:29,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 19:18:29,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:18:29,850 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) [2021-06-12 19:18:30,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:18:30,033 INFO L93 Difference]: Finished difference Result 1563 states and 3719 transitions. [2021-06-12 19:18:30,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:18:30,034 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 [2021-06-12 19:18:30,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:18:30,036 INFO L225 Difference]: With dead ends: 1563 [2021-06-12 19:18:30,036 INFO L226 Difference]: Without dead ends: 1543 [2021-06-12 19:18:30,036 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 66.9ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:18:30,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1543 states. [2021-06-12 19:18:30,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1543 to 1526. [2021-06-12 19:18:30,051 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) [2021-06-12 19:18:30,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1526 states to 1526 states and 3662 transitions. [2021-06-12 19:18:30,054 INFO L78 Accepts]: Start accepts. Automaton has 1526 states and 3662 transitions. Word has length 35 [2021-06-12 19:18:30,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:18:30,054 INFO L482 AbstractCegarLoop]: Abstraction has 1526 states and 3662 transitions. [2021-06-12 19:18:30,054 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) [2021-06-12 19:18:30,054 INFO L276 IsEmpty]: Start isEmpty. Operand 1526 states and 3662 transitions. [2021-06-12 19:18:30,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-12 19:18:30,056 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:18:30,056 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:18:30,264 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable171 [2021-06-12 19:18:30,265 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:18:30,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:18:30,265 INFO L82 PathProgramCache]: Analyzing trace with hash -1273583998, now seen corresponding path program 29 times [2021-06-12 19:18:30,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:18:30,265 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616907962] [2021-06-12 19:18:30,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:18:30,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:18:30,309 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:18:30,309 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:18:30,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616907962] [2021-06-12 19:18:30,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616907962] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:18:30,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431447460] [2021-06-12 19:18:30,309 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 [2021-06-12 19:18:30,336 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-12 19:18:30,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:18:30,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 19:18:30,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:18:30,397 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 18 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:18:30,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [431447460] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:18:30,397 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:18:30,397 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 9 [2021-06-12 19:18:30,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390578883] [2021-06-12 19:18:30,397 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 19:18:30,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:18:30,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 19:18:30,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:18:30,398 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) [2021-06-12 19:18:30,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:18:30,519 INFO L93 Difference]: Finished difference Result 2415 states and 5508 transitions. [2021-06-12 19:18:30,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:18:30,520 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 [2021-06-12 19:18:30,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:18:30,522 INFO L225 Difference]: With dead ends: 2415 [2021-06-12 19:18:30,522 INFO L226 Difference]: Without dead ends: 2415 [2021-06-12 19:18:30,522 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 52.5ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:18:30,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2415 states. [2021-06-12 19:18:30,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2415 to 1653. [2021-06-12 19:18:30,536 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) [2021-06-12 19:18:30,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1653 states to 1653 states and 4043 transitions. [2021-06-12 19:18:30,538 INFO L78 Accepts]: Start accepts. Automaton has 1653 states and 4043 transitions. Word has length 35 [2021-06-12 19:18:30,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:18:30,538 INFO L482 AbstractCegarLoop]: Abstraction has 1653 states and 4043 transitions. [2021-06-12 19:18:30,538 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) [2021-06-12 19:18:30,538 INFO L276 IsEmpty]: Start isEmpty. Operand 1653 states and 4043 transitions. [2021-06-12 19:18:30,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-12 19:18:30,540 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:18:30,540 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:18:30,740 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:18:30,740 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:18:30,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:18:30,740 INFO L82 PathProgramCache]: Analyzing trace with hash -1511645515, now seen corresponding path program 14 times [2021-06-12 19:18:30,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:18:30,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757479990] [2021-06-12 19:18:30,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:18:30,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:18:30,799 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 35 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:18:30,800 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:18:30,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757479990] [2021-06-12 19:18:30,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757479990] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:18:30,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642034157] [2021-06-12 19:18:30,800 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 [2021-06-12 19:18:30,824 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:18:30,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:18:30,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 19:18:30,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:18:30,877 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 35 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:18:30,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1642034157] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:18:30,877 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:18:30,877 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-06-12 19:18:30,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361186226] [2021-06-12 19:18:30,877 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 19:18:30,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:18:30,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 19:18:30,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-06-12 19:18:30,877 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) [2021-06-12 19:18:31,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:18:31,085 INFO L93 Difference]: Finished difference Result 2638 states and 6132 transitions. [2021-06-12 19:18:31,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:18:31,086 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 [2021-06-12 19:18:31,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:18:31,088 INFO L225 Difference]: With dead ends: 2638 [2021-06-12 19:18:31,088 INFO L226 Difference]: Without dead ends: 2596 [2021-06-12 19:18:31,088 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 76.3ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:18:31,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2596 states. [2021-06-12 19:18:31,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2596 to 1819. [2021-06-12 19:18:31,103 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) [2021-06-12 19:18:31,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1819 states to 1819 states and 4471 transitions. [2021-06-12 19:18:31,105 INFO L78 Accepts]: Start accepts. Automaton has 1819 states and 4471 transitions. Word has length 35 [2021-06-12 19:18:31,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:18:31,106 INFO L482 AbstractCegarLoop]: Abstraction has 1819 states and 4471 transitions. [2021-06-12 19:18:31,106 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) [2021-06-12 19:18:31,106 INFO L276 IsEmpty]: Start isEmpty. Operand 1819 states and 4471 transitions. [2021-06-12 19:18:31,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-12 19:18:31,107 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:18:31,107 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:18:31,307 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,94 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:18:31,308 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:18:31,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:18:31,308 INFO L82 PathProgramCache]: Analyzing trace with hash 1229624924, now seen corresponding path program 30 times [2021-06-12 19:18:31,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:18:31,308 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72439907] [2021-06-12 19:18:31,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:18:31,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:18:31,349 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 24 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:18:31,350 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:18:31,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72439907] [2021-06-12 19:18:31,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72439907] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:18:31,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296703723] [2021-06-12 19:18:31,350 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 [2021-06-12 19:18:31,380 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-12 19:18:31,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:18:31,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 19:18:31,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:18:31,432 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 24 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:18:31,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1296703723] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:18:31,433 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:18:31,433 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-12 19:18:31,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229719406] [2021-06-12 19:18:31,433 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 19:18:31,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:18:31,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 19:18:31,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-06-12 19:18:31,433 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) [2021-06-12 19:18:31,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:18:31,517 INFO L93 Difference]: Finished difference Result 2408 states and 5562 transitions. [2021-06-12 19:18:31,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 19:18:31,517 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 [2021-06-12 19:18:31,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:18:31,519 INFO L225 Difference]: With dead ends: 2408 [2021-06-12 19:18:31,519 INFO L226 Difference]: Without dead ends: 2405 [2021-06-12 19:18:31,520 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 33.8ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-06-12 19:18:31,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2405 states. [2021-06-12 19:18:31,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2405 to 1818. [2021-06-12 19:18:31,535 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) [2021-06-12 19:18:31,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1818 states to 1818 states and 4466 transitions. [2021-06-12 19:18:31,537 INFO L78 Accepts]: Start accepts. Automaton has 1818 states and 4466 transitions. Word has length 35 [2021-06-12 19:18:31,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:18:31,537 INFO L482 AbstractCegarLoop]: Abstraction has 1818 states and 4466 transitions. [2021-06-12 19:18:31,537 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) [2021-06-12 19:18:31,537 INFO L276 IsEmpty]: Start isEmpty. Operand 1818 states and 4466 transitions. [2021-06-12 19:18:31,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-12 19:18:31,538 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:18:31,538 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:18:31,739 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:18:31,739 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:18:31,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:18:31,739 INFO L82 PathProgramCache]: Analyzing trace with hash 1436687490, now seen corresponding path program 31 times [2021-06-12 19:18:31,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:18:31,739 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793336958] [2021-06-12 19:18:31,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:18:31,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:18:31,778 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 20 proven. 20 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:18:31,778 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:18:31,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793336958] [2021-06-12 19:18:31,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793336958] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:18:31,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573999104] [2021-06-12 19:18:31,778 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 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 [2021-06-12 19:18:31,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:18:31,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 19:18:31,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:18:31,859 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 20 proven. 20 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:18:31,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [573999104] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:18:31,859 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:18:31,859 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-12 19:18:31,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643157068] [2021-06-12 19:18:31,859 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 19:18:31,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:18:31,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 19:18:31,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-06-12 19:18:31,860 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) [2021-06-12 19:18:31,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:18:31,960 INFO L93 Difference]: Finished difference Result 2608 states and 6106 transitions. [2021-06-12 19:18:31,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 19:18:31,960 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 [2021-06-12 19:18:31,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:18:31,962 INFO L225 Difference]: With dead ends: 2608 [2021-06-12 19:18:31,962 INFO L226 Difference]: Without dead ends: 2596 [2021-06-12 19:18:31,962 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 42.5ms TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:18:31,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2596 states. [2021-06-12 19:18:31,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2596 to 1953. [2021-06-12 19:18:31,979 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) [2021-06-12 19:18:31,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1953 states to 1953 states and 4797 transitions. [2021-06-12 19:18:31,982 INFO L78 Accepts]: Start accepts. Automaton has 1953 states and 4797 transitions. Word has length 35 [2021-06-12 19:18:31,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:18:31,982 INFO L482 AbstractCegarLoop]: Abstraction has 1953 states and 4797 transitions. [2021-06-12 19:18:31,982 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) [2021-06-12 19:18:31,982 INFO L276 IsEmpty]: Start isEmpty. Operand 1953 states and 4797 transitions. [2021-06-12 19:18:31,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-12 19:18:31,983 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:18:31,983 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:18:32,183 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:18:32,184 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:18:32,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:18:32,184 INFO L82 PathProgramCache]: Analyzing trace with hash -11312523, now seen corresponding path program 32 times [2021-06-12 19:18:32,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:18:32,184 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939812982] [2021-06-12 19:18:32,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:18:32,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:18:32,233 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 11 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:18:32,233 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:18:32,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939812982] [2021-06-12 19:18:32,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939812982] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:18:32,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321336141] [2021-06-12 19:18:32,233 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-12 19:18:32,263 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:18:32,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:18:32,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-12 19:18:32,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:18:32,334 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 7 proven. 32 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:18:32,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321336141] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:18:32,335 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:18:32,335 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-06-12 19:18:32,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133988788] [2021-06-12 19:18:32,335 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 19:18:32,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:18:32,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 19:18:32,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-06-12 19:18:32,335 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) [2021-06-12 19:18:32,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:18:32,539 INFO L93 Difference]: Finished difference Result 2377 states and 5580 transitions. [2021-06-12 19:18:32,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:18:32,540 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 [2021-06-12 19:18:32,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:18:32,542 INFO L225 Difference]: With dead ends: 2377 [2021-06-12 19:18:32,542 INFO L226 Difference]: Without dead ends: 2298 [2021-06-12 19:18:32,543 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 66.9ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:18:32,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2298 states. [2021-06-12 19:18:32,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2298 to 2023. [2021-06-12 19:18:32,570 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) [2021-06-12 19:18:32,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2023 states to 2023 states and 4937 transitions. [2021-06-12 19:18:32,572 INFO L78 Accepts]: Start accepts. Automaton has 2023 states and 4937 transitions. Word has length 35 [2021-06-12 19:18:32,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:18:32,572 INFO L482 AbstractCegarLoop]: Abstraction has 2023 states and 4937 transitions. [2021-06-12 19:18:32,572 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) [2021-06-12 19:18:32,572 INFO L276 IsEmpty]: Start isEmpty. Operand 2023 states and 4937 transitions. [2021-06-12 19:18:32,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-12 19:18:32,574 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:18:32,574 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:18:32,774 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2021-06-12 19:18:32,774 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:18:32,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:18:32,775 INFO L82 PathProgramCache]: Analyzing trace with hash -624848703, now seen corresponding path program 33 times [2021-06-12 19:18:32,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:18:32,775 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264291220] [2021-06-12 19:18:32,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:18:32,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:18:32,835 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 29 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:18:32,835 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:18:32,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264291220] [2021-06-12 19:18:32,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264291220] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:18:32,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203238661] [2021-06-12 19:18:32,835 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 [2021-06-12 19:18:32,866 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-12 19:18:32,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:18:32,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-12 19:18:32,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:18:32,924 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 30 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:18:32,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1203238661] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:18:32,924 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:18:32,924 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-06-12 19:18:32,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678601170] [2021-06-12 19:18:32,925 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 19:18:32,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:18:32,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 19:18:32,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-06-12 19:18:32,925 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) [2021-06-12 19:18:33,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:18:33,088 INFO L93 Difference]: Finished difference Result 2392 states and 5647 transitions. [2021-06-12 19:18:33,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:18:33,089 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 [2021-06-12 19:18:33,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:18:33,092 INFO L225 Difference]: With dead ends: 2392 [2021-06-12 19:18:33,092 INFO L226 Difference]: Without dead ends: 2380 [2021-06-12 19:18:33,092 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 79.1ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:18:33,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2380 states. [2021-06-12 19:18:33,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2380 to 2025. [2021-06-12 19:18:33,115 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) [2021-06-12 19:18:33,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2025 states to 2025 states and 4941 transitions. [2021-06-12 19:18:33,119 INFO L78 Accepts]: Start accepts. Automaton has 2025 states and 4941 transitions. Word has length 35 [2021-06-12 19:18:33,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:18:33,119 INFO L482 AbstractCegarLoop]: Abstraction has 2025 states and 4941 transitions. [2021-06-12 19:18:33,119 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) [2021-06-12 19:18:33,119 INFO L276 IsEmpty]: Start isEmpty. Operand 2025 states and 4941 transitions. [2021-06-12 19:18:33,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-12 19:18:33,121 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:18:33,121 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:18:33,344 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:18:33,344 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:18:33,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:18:33,344 INFO L82 PathProgramCache]: Analyzing trace with hash 1517068631, now seen corresponding path program 34 times [2021-06-12 19:18:33,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:18:33,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324393999] [2021-06-12 19:18:33,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:18:33,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:18:33,398 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 30 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:18:33,398 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:18:33,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324393999] [2021-06-12 19:18:33,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324393999] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:18:33,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359906114] [2021-06-12 19:18:33,398 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 [2021-06-12 19:18:33,422 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:18:33,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:18:33,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-12 19:18:33,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:18:33,473 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 31 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:18:33,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [359906114] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:18:33,473 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:18:33,473 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-12 19:18:33,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790254394] [2021-06-12 19:18:33,473 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 19:18:33,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:18:33,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 19:18:33,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-06-12 19:18:33,474 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) [2021-06-12 19:18:33,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:18:33,726 INFO L93 Difference]: Finished difference Result 3056 states and 7043 transitions. [2021-06-12 19:18:33,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 19:18:33,727 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 [2021-06-12 19:18:33,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:18:33,730 INFO L225 Difference]: With dead ends: 3056 [2021-06-12 19:18:33,730 INFO L226 Difference]: Without dead ends: 3002 [2021-06-12 19:18:33,730 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 126.0ms TimeCoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:18:33,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3002 states. [2021-06-12 19:18:33,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3002 to 2084. [2021-06-12 19:18:33,749 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) [2021-06-12 19:18:33,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2084 states to 2084 states and 5095 transitions. [2021-06-12 19:18:33,751 INFO L78 Accepts]: Start accepts. Automaton has 2084 states and 5095 transitions. Word has length 35 [2021-06-12 19:18:33,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:18:33,752 INFO L482 AbstractCegarLoop]: Abstraction has 2084 states and 5095 transitions. [2021-06-12 19:18:33,752 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) [2021-06-12 19:18:33,752 INFO L276 IsEmpty]: Start isEmpty. Operand 2084 states and 5095 transitions. [2021-06-12 19:18:33,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-12 19:18:33,753 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:18:33,753 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:18:33,953 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:18:33,954 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:18:33,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:18:33,954 INFO L82 PathProgramCache]: Analyzing trace with hash -1245339556, now seen corresponding path program 35 times [2021-06-12 19:18:33,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:18:33,954 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523438524] [2021-06-12 19:18:33,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:18:33,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:18:34,001 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 15 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:18:34,001 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:18:34,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523438524] [2021-06-12 19:18:34,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523438524] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:18:34,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508858857] [2021-06-12 19:18:34,002 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 [2021-06-12 19:18:34,026 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-12 19:18:34,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:18:34,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 19:18:34,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:18:34,091 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 16 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:18:34,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508858857] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:18:34,091 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:18:34,091 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 10 [2021-06-12 19:18:34,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027935950] [2021-06-12 19:18:34,091 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:18:34,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:18:34,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:18:34,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:18:34,092 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) [2021-06-12 19:18:34,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:18:34,243 INFO L93 Difference]: Finished difference Result 2889 states and 6691 transitions. [2021-06-12 19:18:34,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:18:34,244 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 [2021-06-12 19:18:34,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:18:34,246 INFO L225 Difference]: With dead ends: 2889 [2021-06-12 19:18:34,246 INFO L226 Difference]: Without dead ends: 2865 [2021-06-12 19:18:34,246 INFO L728 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 [2021-06-12 19:18:34,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2865 states. [2021-06-12 19:18:34,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2865 to 2164. [2021-06-12 19:18:34,264 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) [2021-06-12 19:18:34,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2164 states to 2164 states and 5338 transitions. [2021-06-12 19:18:34,266 INFO L78 Accepts]: Start accepts. Automaton has 2164 states and 5338 transitions. Word has length 35 [2021-06-12 19:18:34,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:18:34,266 INFO L482 AbstractCegarLoop]: Abstraction has 2164 states and 5338 transitions. [2021-06-12 19:18:34,266 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) [2021-06-12 19:18:34,266 INFO L276 IsEmpty]: Start isEmpty. Operand 2164 states and 5338 transitions. [2021-06-12 19:18:34,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-12 19:18:34,268 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:18:34,268 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:18:34,468 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable182 [2021-06-12 19:18:34,468 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:18:34,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:18:34,469 INFO L82 PathProgramCache]: Analyzing trace with hash 1671905165, now seen corresponding path program 36 times [2021-06-12 19:18:34,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:18:34,469 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829218710] [2021-06-12 19:18:34,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:18:34,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:18:34,522 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 30 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:18:34,523 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:18:34,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829218710] [2021-06-12 19:18:34,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829218710] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:18:34,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538390831] [2021-06-12 19:18:34,523 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 [2021-06-12 19:18:34,548 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-12 19:18:34,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:18:34,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-12 19:18:34,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:18:34,602 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 31 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:18:34,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538390831] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:18:34,602 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:18:34,602 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-12 19:18:34,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280556111] [2021-06-12 19:18:34,603 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 19:18:34,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:18:34,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 19:18:34,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:18:34,603 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) [2021-06-12 19:18:34,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:18:34,984 INFO L93 Difference]: Finished difference Result 3794 states and 8733 transitions. [2021-06-12 19:18:34,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-12 19:18:34,985 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 [2021-06-12 19:18:34,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:18:34,989 INFO L225 Difference]: With dead ends: 3794 [2021-06-12 19:18:34,989 INFO L226 Difference]: Without dead ends: 3680 [2021-06-12 19:18:34,989 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 219.4ms TimeCoverageRelationStatistics Valid=159, Invalid=771, Unknown=0, NotChecked=0, Total=930 [2021-06-12 19:18:34,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3680 states. [2021-06-12 19:18:35,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3680 to 2276. [2021-06-12 19:18:35,012 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) [2021-06-12 19:18:35,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2276 states to 2276 states and 5629 transitions. [2021-06-12 19:18:35,015 INFO L78 Accepts]: Start accepts. Automaton has 2276 states and 5629 transitions. Word has length 35 [2021-06-12 19:18:35,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:18:35,015 INFO L482 AbstractCegarLoop]: Abstraction has 2276 states and 5629 transitions. [2021-06-12 19:18:35,015 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) [2021-06-12 19:18:35,015 INFO L276 IsEmpty]: Start isEmpty. Operand 2276 states and 5629 transitions. [2021-06-12 19:18:35,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-12 19:18:35,016 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:18:35,016 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:18:35,220 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:18:35,221 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:18:35,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:18:35,221 INFO L82 PathProgramCache]: Analyzing trace with hash 2058507842, now seen corresponding path program 37 times [2021-06-12 19:18:35,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:18:35,221 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95371545] [2021-06-12 19:18:35,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:18:35,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:18:35,281 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 16 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:18:35,282 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:18:35,282 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95371545] [2021-06-12 19:18:35,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95371545] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:18:35,282 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690688939] [2021-06-12 19:18:35,282 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 [2021-06-12 19:18:35,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:18:35,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 19:18:35,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:18:35,382 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 16 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:18:35,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1690688939] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:18:35,382 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:18:35,382 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-12 19:18:35,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414889706] [2021-06-12 19:18:35,382 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 19:18:35,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:18:35,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 19:18:35,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:18:35,383 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) [2021-06-12 19:18:35,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:18:35,495 INFO L93 Difference]: Finished difference Result 2985 states and 6922 transitions. [2021-06-12 19:18:35,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:18:35,495 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 [2021-06-12 19:18:35,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:18:35,498 INFO L225 Difference]: With dead ends: 2985 [2021-06-12 19:18:35,498 INFO L226 Difference]: Without dead ends: 2949 [2021-06-12 19:18:35,498 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 73.4ms TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:18:35,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2949 states. [2021-06-12 19:18:35,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2949 to 2276. [2021-06-12 19:18:35,519 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) [2021-06-12 19:18:35,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2276 states to 2276 states and 5625 transitions. [2021-06-12 19:18:35,521 INFO L78 Accepts]: Start accepts. Automaton has 2276 states and 5625 transitions. Word has length 35 [2021-06-12 19:18:35,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:18:35,522 INFO L482 AbstractCegarLoop]: Abstraction has 2276 states and 5625 transitions. [2021-06-12 19:18:35,522 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) [2021-06-12 19:18:35,522 INFO L276 IsEmpty]: Start isEmpty. Operand 2276 states and 5625 transitions. [2021-06-12 19:18:35,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-12 19:18:35,523 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:18:35,523 INFO L472 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:18:35,724 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,102 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:18:35,725 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:18:35,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:18:35,725 INFO L82 PathProgramCache]: Analyzing trace with hash 1612213655, now seen corresponding path program 38 times [2021-06-12 19:18:35,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:18:35,725 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137857919] [2021-06-12 19:18:35,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:18:35,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:18:35,787 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:18:35,787 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:18:35,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137857919] [2021-06-12 19:18:35,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137857919] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:18:35,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817587921] [2021-06-12 19:18:35,787 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 [2021-06-12 19:18:35,811 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:18:35,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:18:35,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-12 19:18:35,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:18:35,859 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:18:35,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1817587921] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:18:35,860 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:18:35,860 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-12 19:18:35,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221253460] [2021-06-12 19:18:35,860 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:18:35,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:18:35,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:18:35,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:18:35,860 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) [2021-06-12 19:18:36,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:18:36,120 INFO L93 Difference]: Finished difference Result 3037 states and 7074 transitions. [2021-06-12 19:18:36,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:18:36,120 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 [2021-06-12 19:18:36,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:18:36,122 INFO L225 Difference]: With dead ends: 3037 [2021-06-12 19:18:36,122 INFO L226 Difference]: Without dead ends: 2881 [2021-06-12 19:18:36,123 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 146.5ms TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:18:36,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2881 states. [2021-06-12 19:18:36,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2881 to 2074. [2021-06-12 19:18:36,140 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) [2021-06-12 19:18:36,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2074 states to 2074 states and 5096 transitions. [2021-06-12 19:18:36,142 INFO L78 Accepts]: Start accepts. Automaton has 2074 states and 5096 transitions. Word has length 35 [2021-06-12 19:18:36,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:18:36,142 INFO L482 AbstractCegarLoop]: Abstraction has 2074 states and 5096 transitions. [2021-06-12 19:18:36,142 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) [2021-06-12 19:18:36,142 INFO L276 IsEmpty]: Start isEmpty. Operand 2074 states and 5096 transitions. [2021-06-12 19:18:36,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-12 19:18:36,144 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:18:36,144 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:18:36,345 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:18:36,346 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:18:36,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:18:36,346 INFO L82 PathProgramCache]: Analyzing trace with hash 1374152138, now seen corresponding path program 15 times [2021-06-12 19:18:36,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:18:36,346 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356792198] [2021-06-12 19:18:36,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:18:36,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:18:36,392 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 32 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:18:36,393 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:18:36,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356792198] [2021-06-12 19:18:36,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356792198] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:18:36,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858170958] [2021-06-12 19:18:36,393 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 [2021-06-12 19:18:36,418 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-12 19:18:36,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:18:36,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 19:18:36,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:18:36,468 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 32 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:18:36,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [858170958] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:18:36,469 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:18:36,469 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 8 [2021-06-12 19:18:36,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900619975] [2021-06-12 19:18:36,470 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 19:18:36,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:18:36,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 19:18:36,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-06-12 19:18:36,470 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) [2021-06-12 19:18:36,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:18:36,623 INFO L93 Difference]: Finished difference Result 2850 states and 6708 transitions. [2021-06-12 19:18:36,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:18:36,623 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 [2021-06-12 19:18:36,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:18:36,626 INFO L225 Difference]: With dead ends: 2850 [2021-06-12 19:18:36,626 INFO L226 Difference]: Without dead ends: 2832 [2021-06-12 19:18:36,626 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 63.3ms TimeCoverageRelationStatistics Valid=66, Invalid=90, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:18:36,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2832 states. [2021-06-12 19:18:36,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2832 to 2298. [2021-06-12 19:18:36,645 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) [2021-06-12 19:18:36,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2298 states to 2298 states and 5720 transitions. [2021-06-12 19:18:36,648 INFO L78 Accepts]: Start accepts. Automaton has 2298 states and 5720 transitions. Word has length 35 [2021-06-12 19:18:36,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:18:36,648 INFO L482 AbstractCegarLoop]: Abstraction has 2298 states and 5720 transitions. [2021-06-12 19:18:36,648 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) [2021-06-12 19:18:36,648 INFO L276 IsEmpty]: Start isEmpty. Operand 2298 states and 5720 transitions. [2021-06-12 19:18:36,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-12 19:18:36,650 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:18:36,650 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:18:36,850 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable193 [2021-06-12 19:18:36,850 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:18:36,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:18:36,850 INFO L82 PathProgramCache]: Analyzing trace with hash 752271728, now seen corresponding path program 16 times [2021-06-12 19:18:36,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:18:36,851 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623710091] [2021-06-12 19:18:36,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:18:36,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:18:36,889 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 32 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:18:36,890 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:18:36,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623710091] [2021-06-12 19:18:36,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623710091] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:18:36,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978896962] [2021-06-12 19:18:36,890 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 [2021-06-12 19:18:36,925 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:18:36,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:18:36,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 19:18:36,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:18:36,992 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 33 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:18:36,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1978896962] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:18:36,992 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:18:36,992 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 9 [2021-06-12 19:18:36,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209422257] [2021-06-12 19:18:36,993 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 19:18:36,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:18:36,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 19:18:36,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:18:36,993 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) [2021-06-12 19:18:37,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:18:37,204 INFO L93 Difference]: Finished difference Result 2847 states and 6724 transitions. [2021-06-12 19:18:37,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:18:37,204 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 [2021-06-12 19:18:37,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:18:37,208 INFO L225 Difference]: With dead ends: 2847 [2021-06-12 19:18:37,208 INFO L226 Difference]: Without dead ends: 2847 [2021-06-12 19:18:37,208 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 103.4ms TimeCoverageRelationStatistics Valid=99, Invalid=141, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:18:37,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2847 states. [2021-06-12 19:18:37,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2847 to 2179. [2021-06-12 19:18:37,236 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) [2021-06-12 19:18:37,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2179 states to 2179 states and 5385 transitions. [2021-06-12 19:18:37,240 INFO L78 Accepts]: Start accepts. Automaton has 2179 states and 5385 transitions. Word has length 35 [2021-06-12 19:18:37,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:18:37,240 INFO L482 AbstractCegarLoop]: Abstraction has 2179 states and 5385 transitions. [2021-06-12 19:18:37,240 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) [2021-06-12 19:18:37,240 INFO L276 IsEmpty]: Start isEmpty. Operand 2179 states and 5385 transitions. [2021-06-12 19:18:37,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-12 19:18:37,242 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:18:37,242 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:18:37,456 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,105 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:18:37,457 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:18:37,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:18:37,457 INFO L82 PathProgramCache]: Analyzing trace with hash -789180772, now seen corresponding path program 39 times [2021-06-12 19:18:37,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:18:37,457 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358232932] [2021-06-12 19:18:37,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:18:37,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:18:37,533 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 24 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:18:37,533 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:18:37,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358232932] [2021-06-12 19:18:37,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358232932] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:18:37,533 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064701824] [2021-06-12 19:18:37,533 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 [2021-06-12 19:18:37,561 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-12 19:18:37,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:18:37,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-12 19:18:37,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:18:37,613 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 24 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:18:37,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1064701824] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:18:37,614 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:18:37,614 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-12 19:18:37,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490386706] [2021-06-12 19:18:37,614 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:18:37,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:18:37,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:18:37,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:18:37,614 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) [2021-06-12 19:18:37,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:18:37,753 INFO L93 Difference]: Finished difference Result 2663 states and 6272 transitions. [2021-06-12 19:18:37,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:18:37,753 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 [2021-06-12 19:18:37,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:18:37,756 INFO L225 Difference]: With dead ends: 2663 [2021-06-12 19:18:37,756 INFO L226 Difference]: Without dead ends: 2616 [2021-06-12 19:18:37,756 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 95.9ms TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:18:37,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2616 states. [2021-06-12 19:18:37,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2616 to 2188. [2021-06-12 19:18:37,775 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) [2021-06-12 19:18:37,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2188 states to 2188 states and 5399 transitions. [2021-06-12 19:18:37,777 INFO L78 Accepts]: Start accepts. Automaton has 2188 states and 5399 transitions. Word has length 35 [2021-06-12 19:18:37,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:18:37,777 INFO L482 AbstractCegarLoop]: Abstraction has 2188 states and 5399 transitions. [2021-06-12 19:18:37,777 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) [2021-06-12 19:18:37,777 INFO L276 IsEmpty]: Start isEmpty. Operand 2188 states and 5399 transitions. [2021-06-12 19:18:37,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-12 19:18:37,779 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:18:37,779 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:18:37,979 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:18:37,980 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:18:37,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:18:37,980 INFO L82 PathProgramCache]: Analyzing trace with hash 1018494725, now seen corresponding path program 40 times [2021-06-12 19:18:37,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:18:37,980 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123795978] [2021-06-12 19:18:37,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:18:37,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:18:38,021 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:18:38,021 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:18:38,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123795978] [2021-06-12 19:18:38,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123795978] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:18:38,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690202521] [2021-06-12 19:18:38,022 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 [2021-06-12 19:18:38,057 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:18:38,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:18:38,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 19:18:38,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:18:38,257 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 22 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:18:38,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1690202521] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:18:38,257 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:18:38,257 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 11] total 16 [2021-06-12 19:18:38,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001788121] [2021-06-12 19:18:38,257 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:18:38,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:18:38,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:18:38,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:18:38,258 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) [2021-06-12 19:18:38,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:18:38,969 INFO L93 Difference]: Finished difference Result 3588 states and 8244 transitions. [2021-06-12 19:18:38,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 19:18:38,969 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 [2021-06-12 19:18:38,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:18:38,973 INFO L225 Difference]: With dead ends: 3588 [2021-06-12 19:18:38,973 INFO L226 Difference]: Without dead ends: 3550 [2021-06-12 19:18:38,974 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 445.1ms TimeCoverageRelationStatistics Valid=345, Invalid=1215, Unknown=0, NotChecked=0, Total=1560 [2021-06-12 19:18:38,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3550 states. [2021-06-12 19:18:38,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3550 to 2578. [2021-06-12 19:18:38,997 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) [2021-06-12 19:18:39,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2578 states to 2578 states and 6275 transitions. [2021-06-12 19:18:39,000 INFO L78 Accepts]: Start accepts. Automaton has 2578 states and 6275 transitions. Word has length 38 [2021-06-12 19:18:39,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:18:39,000 INFO L482 AbstractCegarLoop]: Abstraction has 2578 states and 6275 transitions. [2021-06-12 19:18:39,000 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) [2021-06-12 19:18:39,000 INFO L276 IsEmpty]: Start isEmpty. Operand 2578 states and 6275 transitions. [2021-06-12 19:18:39,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-12 19:18:39,002 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:18:39,002 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:18:39,204 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable204,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:18:39,204 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:18:39,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:18:39,205 INFO L82 PathProgramCache]: Analyzing trace with hash 988310311, now seen corresponding path program 41 times [2021-06-12 19:18:39,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:18:39,205 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701127172] [2021-06-12 19:18:39,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:18:39,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:18:39,257 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-12 19:18:39,257 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:18:39,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701127172] [2021-06-12 19:18:39,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701127172] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:18:39,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680776471] [2021-06-12 19:18:39,257 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 [2021-06-12 19:18:39,284 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-12 19:18:39,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:18:39,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 19:18:39,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:18:39,334 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-12 19:18:39,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1680776471] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:18:39,334 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:18:39,335 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-12 19:18:39,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368469955] [2021-06-12 19:18:39,335 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-12 19:18:39,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:18:39,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-12 19:18:39,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-12 19:18:39,335 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) [2021-06-12 19:18:39,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:18:39,469 INFO L93 Difference]: Finished difference Result 3224 states and 7683 transitions. [2021-06-12 19:18:39,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-12 19:18:39,469 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 [2021-06-12 19:18:39,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:18:39,472 INFO L225 Difference]: With dead ends: 3224 [2021-06-12 19:18:39,472 INFO L226 Difference]: Without dead ends: 3189 [2021-06-12 19:18:39,473 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 28.5ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-12 19:18:39,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3189 states. [2021-06-12 19:18:39,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3189 to 2741. [2021-06-12 19:18:39,496 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) [2021-06-12 19:18:39,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2741 states to 2741 states and 6733 transitions. [2021-06-12 19:18:39,499 INFO L78 Accepts]: Start accepts. Automaton has 2741 states and 6733 transitions. Word has length 38 [2021-06-12 19:18:39,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:18:39,499 INFO L482 AbstractCegarLoop]: Abstraction has 2741 states and 6733 transitions. [2021-06-12 19:18:39,499 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) [2021-06-12 19:18:39,499 INFO L276 IsEmpty]: Start isEmpty. Operand 2741 states and 6733 transitions. [2021-06-12 19:18:39,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-12 19:18:39,501 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:18:39,501 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:18:39,701 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable205 [2021-06-12 19:18:39,702 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:18:39,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:18:39,702 INFO L82 PathProgramCache]: Analyzing trace with hash -1650028221, now seen corresponding path program 42 times [2021-06-12 19:18:39,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:18:39,702 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035964312] [2021-06-12 19:18:39,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:18:39,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:18:39,763 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-12 19:18:39,763 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:18:39,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035964312] [2021-06-12 19:18:39,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035964312] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:18:39,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [404082542] [2021-06-12 19:18:39,764 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-12 19:18:39,797 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-06-12 19:18:39,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:18:39,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-12 19:18:39,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:18:39,923 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 10 proven. 41 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:18:39,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [404082542] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:18:39,923 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:18:39,923 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2021-06-12 19:18:39,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945379743] [2021-06-12 19:18:39,923 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:18:39,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:18:39,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:18:39,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:18:39,924 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) [2021-06-12 19:18:40,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:18:40,437 INFO L93 Difference]: Finished difference Result 4464 states and 10129 transitions. [2021-06-12 19:18:40,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-12 19:18:40,437 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 [2021-06-12 19:18:40,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:18:40,442 INFO L225 Difference]: With dead ends: 4464 [2021-06-12 19:18:40,442 INFO L226 Difference]: Without dead ends: 4401 [2021-06-12 19:18:40,442 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 251.6ms TimeCoverageRelationStatistics Valid=158, Invalid=598, Unknown=0, NotChecked=0, Total=756 [2021-06-12 19:18:40,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4401 states. [2021-06-12 19:18:40,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4401 to 2892. [2021-06-12 19:18:40,471 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) [2021-06-12 19:18:40,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2892 states to 2892 states and 7166 transitions. [2021-06-12 19:18:40,474 INFO L78 Accepts]: Start accepts. Automaton has 2892 states and 7166 transitions. Word has length 38 [2021-06-12 19:18:40,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:18:40,474 INFO L482 AbstractCegarLoop]: Abstraction has 2892 states and 7166 transitions. [2021-06-12 19:18:40,474 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) [2021-06-12 19:18:40,474 INFO L276 IsEmpty]: Start isEmpty. Operand 2892 states and 7166 transitions. [2021-06-12 19:18:40,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-12 19:18:40,477 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:18:40,477 INFO L472 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:18:40,686 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable206,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:18:40,686 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:18:40,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:18:40,687 INFO L82 PathProgramCache]: Analyzing trace with hash 1035175619, now seen corresponding path program 43 times [2021-06-12 19:18:40,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:18:40,687 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018712037] [2021-06-12 19:18:40,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:18:40,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:18:40,725 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-12 19:18:40,725 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:18:40,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018712037] [2021-06-12 19:18:40,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018712037] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:18:40,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434104446] [2021-06-12 19:18:40,725 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 [2021-06-12 19:18:40,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:18:40,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 19:18:40,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:18:40,800 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-12 19:18:40,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434104446] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:18:40,800 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:18:40,800 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-12 19:18:40,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316165432] [2021-06-12 19:18:40,800 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-12 19:18:40,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:18:40,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-12 19:18:40,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-12 19:18:40,801 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) [2021-06-12 19:18:40,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:18:40,944 INFO L93 Difference]: Finished difference Result 3617 states and 8704 transitions. [2021-06-12 19:18:40,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-12 19:18:40,945 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 [2021-06-12 19:18:40,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:18:40,948 INFO L225 Difference]: With dead ends: 3617 [2021-06-12 19:18:40,948 INFO L226 Difference]: Without dead ends: 3592 [2021-06-12 19:18:40,948 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 28.2ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-12 19:18:40,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3592 states. [2021-06-12 19:18:40,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3592 to 3175. [2021-06-12 19:18:40,973 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) [2021-06-12 19:18:40,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3175 states to 3175 states and 7839 transitions. [2021-06-12 19:18:40,977 INFO L78 Accepts]: Start accepts. Automaton has 3175 states and 7839 transitions. Word has length 38 [2021-06-12 19:18:40,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:18:40,977 INFO L482 AbstractCegarLoop]: Abstraction has 3175 states and 7839 transitions. [2021-06-12 19:18:40,977 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) [2021-06-12 19:18:40,977 INFO L276 IsEmpty]: Start isEmpty. Operand 3175 states and 7839 transitions. [2021-06-12 19:18:40,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-12 19:18:40,979 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:18:40,979 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:18:41,180 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable207 [2021-06-12 19:18:41,180 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:18:41,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:18:41,180 INFO L82 PathProgramCache]: Analyzing trace with hash -1350282616, now seen corresponding path program 17 times [2021-06-12 19:18:41,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:18:41,180 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545026679] [2021-06-12 19:18:41,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:18:41,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:18:41,268 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 5 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:18:41,268 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:18:41,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545026679] [2021-06-12 19:18:41,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545026679] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:18:41,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069934307] [2021-06-12 19:18:41,269 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 [2021-06-12 19:18:41,299 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-12 19:18:41,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:18:41,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:18:41,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:18:41,360 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 5 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:18:41,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2069934307] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:18:41,360 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:18:41,360 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-12 19:18:41,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279948907] [2021-06-12 19:18:41,360 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:18:41,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:18:41,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:18:41,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:18:41,361 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) [2021-06-12 19:18:41,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:18:41,774 INFO L93 Difference]: Finished difference Result 4225 states and 9893 transitions. [2021-06-12 19:18:41,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:18:41,774 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 [2021-06-12 19:18:41,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:18:41,778 INFO L225 Difference]: With dead ends: 4225 [2021-06-12 19:18:41,778 INFO L226 Difference]: Without dead ends: 4189 [2021-06-12 19:18:41,778 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 215.1ms TimeCoverageRelationStatistics Valid=126, Invalid=524, Unknown=0, NotChecked=0, Total=650 [2021-06-12 19:18:41,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4189 states. [2021-06-12 19:18:41,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4189 to 3084. [2021-06-12 19:18:41,805 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) [2021-06-12 19:18:41,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3084 states to 3084 states and 7646 transitions. [2021-06-12 19:18:41,808 INFO L78 Accepts]: Start accepts. Automaton has 3084 states and 7646 transitions. Word has length 41 [2021-06-12 19:18:41,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:18:41,808 INFO L482 AbstractCegarLoop]: Abstraction has 3084 states and 7646 transitions. [2021-06-12 19:18:41,809 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) [2021-06-12 19:18:41,809 INFO L276 IsEmpty]: Start isEmpty. Operand 3084 states and 7646 transitions. [2021-06-12 19:18:41,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-12 19:18:41,811 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:18:41,811 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:18:42,011 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:18:42,012 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:18:42,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:18:42,012 INFO L82 PathProgramCache]: Analyzing trace with hash 1492128392, now seen corresponding path program 44 times [2021-06-12 19:18:42,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:18:42,012 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442706188] [2021-06-12 19:18:42,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:18:42,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:18:42,123 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 11 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:18:42,124 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:18:42,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442706188] [2021-06-12 19:18:42,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442706188] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:18:42,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886606983] [2021-06-12 19:18:42,124 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 [2021-06-12 19:18:42,149 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:18:42,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:18:42,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:18:42,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:18:42,328 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 9 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:18:42,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [886606983] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:18:42,328 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:18:42,328 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-06-12 19:18:42,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507234150] [2021-06-12 19:18:42,329 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:18:42,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:18:42,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:18:42,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:18:42,329 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) [2021-06-12 19:18:42,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:18:42,841 INFO L93 Difference]: Finished difference Result 3304 states and 7993 transitions. [2021-06-12 19:18:42,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:18:42,841 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 [2021-06-12 19:18:42,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:18:42,844 INFO L225 Difference]: With dead ends: 3304 [2021-06-12 19:18:42,844 INFO L226 Difference]: Without dead ends: 3236 [2021-06-12 19:18:42,844 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 170.7ms TimeCoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:18:42,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3236 states. [2021-06-12 19:18:42,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3236 to 3084. [2021-06-12 19:18:42,866 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) [2021-06-12 19:18:42,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3084 states to 3084 states and 7630 transitions. [2021-06-12 19:18:42,869 INFO L78 Accepts]: Start accepts. Automaton has 3084 states and 7630 transitions. Word has length 41 [2021-06-12 19:18:42,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:18:42,869 INFO L482 AbstractCegarLoop]: Abstraction has 3084 states and 7630 transitions. [2021-06-12 19:18:42,869 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) [2021-06-12 19:18:42,869 INFO L276 IsEmpty]: Start isEmpty. Operand 3084 states and 7630 transitions. [2021-06-12 19:18:42,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-12 19:18:42,871 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:18:42,871 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:18:43,072 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable209 [2021-06-12 19:18:43,072 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:18:43,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:18:43,072 INFO L82 PathProgramCache]: Analyzing trace with hash -1073103992, now seen corresponding path program 45 times [2021-06-12 19:18:43,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:18:43,072 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466768672] [2021-06-12 19:18:43,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:18:43,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:18:43,135 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:18:43,135 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:18:43,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466768672] [2021-06-12 19:18:43,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466768672] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:18:43,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668430509] [2021-06-12 19:18:43,135 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 [2021-06-12 19:18:43,180 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-12 19:18:43,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:18:43,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:18:43,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:18:43,241 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:18:43,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1668430509] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:18:43,241 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:18:43,241 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-12 19:18:43,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887629557] [2021-06-12 19:18:43,242 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 19:18:43,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:18:43,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 19:18:43,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-06-12 19:18:43,242 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) [2021-06-12 19:18:43,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:18:43,437 INFO L93 Difference]: Finished difference Result 3450 states and 8325 transitions. [2021-06-12 19:18:43,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:18:43,438 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 [2021-06-12 19:18:43,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:18:43,441 INFO L225 Difference]: With dead ends: 3450 [2021-06-12 19:18:43,442 INFO L226 Difference]: Without dead ends: 3450 [2021-06-12 19:18:43,442 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 85.5ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:18:43,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3450 states. [2021-06-12 19:18:43,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3450 to 3096. [2021-06-12 19:18:43,467 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) [2021-06-12 19:18:43,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3096 states to 3096 states and 7667 transitions. [2021-06-12 19:18:43,471 INFO L78 Accepts]: Start accepts. Automaton has 3096 states and 7667 transitions. Word has length 41 [2021-06-12 19:18:43,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:18:43,471 INFO L482 AbstractCegarLoop]: Abstraction has 3096 states and 7667 transitions. [2021-06-12 19:18:43,471 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) [2021-06-12 19:18:43,471 INFO L276 IsEmpty]: Start isEmpty. Operand 3096 states and 7667 transitions. [2021-06-12 19:18:43,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-12 19:18:43,473 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:18:43,473 INFO L472 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:18:43,673 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable210 [2021-06-12 19:18:43,674 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:18:43,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:18:43,674 INFO L82 PathProgramCache]: Analyzing trace with hash 665060437, now seen corresponding path program 18 times [2021-06-12 19:18:43,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:18:43,674 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194792717] [2021-06-12 19:18:43,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:18:43,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:18:43,757 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 41 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:18:43,757 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:18:43,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194792717] [2021-06-12 19:18:43,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194792717] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:18:43,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988859310] [2021-06-12 19:18:43,757 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 [2021-06-12 19:18:43,784 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-12 19:18:43,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:18:43,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 19:18:43,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:18:43,864 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 41 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:18:43,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1988859310] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:18:43,865 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:18:43,865 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 14 [2021-06-12 19:18:43,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788056998] [2021-06-12 19:18:43,865 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:18:43,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:18:43,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:18:43,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:18:43,865 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) [2021-06-12 19:18:44,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:18:44,100 INFO L93 Difference]: Finished difference Result 4321 states and 10236 transitions. [2021-06-12 19:18:44,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:18:44,100 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 [2021-06-12 19:18:44,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:18:44,104 INFO L225 Difference]: With dead ends: 4321 [2021-06-12 19:18:44,104 INFO L226 Difference]: Without dead ends: 4263 [2021-06-12 19:18:44,104 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 141.7ms TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:18:44,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4263 states. [2021-06-12 19:18:44,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4263 to 3240. [2021-06-12 19:18:44,136 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) [2021-06-12 19:18:44,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3240 states to 3240 states and 8066 transitions. [2021-06-12 19:18:44,140 INFO L78 Accepts]: Start accepts. Automaton has 3240 states and 8066 transitions. Word has length 41 [2021-06-12 19:18:44,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:18:44,140 INFO L482 AbstractCegarLoop]: Abstraction has 3240 states and 8066 transitions. [2021-06-12 19:18:44,140 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) [2021-06-12 19:18:44,140 INFO L276 IsEmpty]: Start isEmpty. Operand 3240 states and 8066 transitions. [2021-06-12 19:18:44,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-12 19:18:44,142 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:18:44,143 INFO L472 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:18:44,343 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable211 [2021-06-12 19:18:44,343 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:18:44,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:18:44,343 INFO L82 PathProgramCache]: Analyzing trace with hash 9364347, now seen corresponding path program 19 times [2021-06-12 19:18:44,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:18:44,343 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255639169] [2021-06-12 19:18:44,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:18:44,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:18:44,389 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 42 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:18:44,390 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:18:44,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255639169] [2021-06-12 19:18:44,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255639169] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:18:44,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317920416] [2021-06-12 19:18:44,390 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 [2021-06-12 19:18:44,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:18:44,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 19:18:44,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:18:44,514 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 43 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:18:44,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [317920416] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:18:44,514 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:18:44,514 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 9 [2021-06-12 19:18:44,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595809207] [2021-06-12 19:18:44,514 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 19:18:44,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:18:44,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 19:18:44,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:18:44,515 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) [2021-06-12 19:18:44,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:18:44,657 INFO L93 Difference]: Finished difference Result 4797 states and 11528 transitions. [2021-06-12 19:18:44,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:18:44,657 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 [2021-06-12 19:18:44,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:18:44,663 INFO L225 Difference]: With dead ends: 4797 [2021-06-12 19:18:44,663 INFO L226 Difference]: Without dead ends: 4797 [2021-06-12 19:18:44,663 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 52.1ms TimeCoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:18:44,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4797 states. [2021-06-12 19:18:44,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4797 to 3486. [2021-06-12 19:18:44,728 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) [2021-06-12 19:18:44,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3486 states to 3486 states and 8805 transitions. [2021-06-12 19:18:44,734 INFO L78 Accepts]: Start accepts. Automaton has 3486 states and 8805 transitions. Word has length 41 [2021-06-12 19:18:44,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:18:44,734 INFO L482 AbstractCegarLoop]: Abstraction has 3486 states and 8805 transitions. [2021-06-12 19:18:44,734 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) [2021-06-12 19:18:44,734 INFO L276 IsEmpty]: Start isEmpty. Operand 3486 states and 8805 transitions. [2021-06-12 19:18:44,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-12 19:18:44,738 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:18:44,738 INFO L472 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:18:44,944 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable218,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:18:44,945 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:18:44,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:18:44,945 INFO L82 PathProgramCache]: Analyzing trace with hash -524501029, now seen corresponding path program 46 times [2021-06-12 19:18:44,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:18:44,945 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530255587] [2021-06-12 19:18:44,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:18:44,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:18:44,994 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 33 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:18:44,994 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:18:44,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530255587] [2021-06-12 19:18:44,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530255587] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:18:44,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250123272] [2021-06-12 19:18:44,994 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 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 [2021-06-12 19:18:45,018 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:18:45,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:18:45,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 19:18:45,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:18:45,089 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 33 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:18:45,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [250123272] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:18:45,089 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:18:45,089 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-06-12 19:18:45,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234264054] [2021-06-12 19:18:45,090 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 19:18:45,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:18:45,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 19:18:45,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-06-12 19:18:45,090 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) [2021-06-12 19:18:45,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:18:45,217 INFO L93 Difference]: Finished difference Result 3733 states and 9242 transitions. [2021-06-12 19:18:45,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 19:18:45,217 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 [2021-06-12 19:18:45,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:18:45,221 INFO L225 Difference]: With dead ends: 3733 [2021-06-12 19:18:45,221 INFO L226 Difference]: Without dead ends: 3727 [2021-06-12 19:18:45,221 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 45.3ms TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:18:45,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3727 states. [2021-06-12 19:18:45,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3727 to 3447. [2021-06-12 19:18:45,250 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) [2021-06-12 19:18:45,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3447 states to 3447 states and 8682 transitions. [2021-06-12 19:18:45,254 INFO L78 Accepts]: Start accepts. Automaton has 3447 states and 8682 transitions. Word has length 41 [2021-06-12 19:18:45,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:18:45,254 INFO L482 AbstractCegarLoop]: Abstraction has 3447 states and 8682 transitions. [2021-06-12 19:18:45,254 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) [2021-06-12 19:18:45,254 INFO L276 IsEmpty]: Start isEmpty. Operand 3447 states and 8682 transitions. [2021-06-12 19:18:45,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-12 19:18:45,257 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:18:45,257 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:18:45,457 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable219 [2021-06-12 19:18:45,457 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:18:45,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:18:45,457 INFO L82 PathProgramCache]: Analyzing trace with hash -1583917210, now seen corresponding path program 20 times [2021-06-12 19:18:45,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:18:45,457 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230950602] [2021-06-12 19:18:45,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:18:45,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:18:45,518 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 6 proven. 57 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:18:45,518 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:18:45,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230950602] [2021-06-12 19:18:45,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230950602] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:18:45,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338248623] [2021-06-12 19:18:45,518 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 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 [2021-06-12 19:18:45,543 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:18:45,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:18:45,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:18:45,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:18:45,602 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 5 proven. 58 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:18:45,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1338248623] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:18:45,603 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:18:45,603 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-12 19:18:45,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224210915] [2021-06-12 19:18:45,603 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 19:18:45,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:18:45,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 19:18:45,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-06-12 19:18:45,603 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) [2021-06-12 19:18:45,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:18:45,819 INFO L93 Difference]: Finished difference Result 4309 states and 10396 transitions. [2021-06-12 19:18:45,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:18:45,819 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 [2021-06-12 19:18:45,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:18:45,824 INFO L225 Difference]: With dead ends: 4309 [2021-06-12 19:18:45,824 INFO L226 Difference]: Without dead ends: 4278 [2021-06-12 19:18:45,824 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 83.5ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:18:45,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4278 states. [2021-06-12 19:18:45,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4278 to 3497. [2021-06-12 19:18:45,855 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) [2021-06-12 19:18:45,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3497 states to 3497 states and 8796 transitions. [2021-06-12 19:18:45,859 INFO L78 Accepts]: Start accepts. Automaton has 3497 states and 8796 transitions. Word has length 41 [2021-06-12 19:18:45,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:18:45,859 INFO L482 AbstractCegarLoop]: Abstraction has 3497 states and 8796 transitions. [2021-06-12 19:18:45,860 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) [2021-06-12 19:18:45,860 INFO L276 IsEmpty]: Start isEmpty. Operand 3497 states and 8796 transitions. [2021-06-12 19:18:45,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-12 19:18:45,862 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:18:45,862 INFO L472 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:18:46,063 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable222,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:18:46,063 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:18:46,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:18:46,063 INFO L82 PathProgramCache]: Analyzing trace with hash 1157353229, now seen corresponding path program 47 times [2021-06-12 19:18:46,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:18:46,063 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761783219] [2021-06-12 19:18:46,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:18:46,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:18:46,101 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 31 proven. 32 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-12 19:18:46,101 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:18:46,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761783219] [2021-06-12 19:18:46,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761783219] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:18:46,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182446096] [2021-06-12 19:18:46,101 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 [2021-06-12 19:18:46,127 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-12 19:18:46,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:18:46,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 19:18:46,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:18:46,203 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 35 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:18:46,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1182446096] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:18:46,203 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:18:46,203 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10] total 11 [2021-06-12 19:18:46,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076775589] [2021-06-12 19:18:46,203 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 19:18:46,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:18:46,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 19:18:46,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:18:46,203 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) [2021-06-12 19:18:46,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:18:46,398 INFO L93 Difference]: Finished difference Result 4421 states and 10653 transitions. [2021-06-12 19:18:46,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:18:46,398 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 [2021-06-12 19:18:46,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:18:46,405 INFO L225 Difference]: With dead ends: 4421 [2021-06-12 19:18:46,405 INFO L226 Difference]: Without dead ends: 4412 [2021-06-12 19:18:46,406 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 63.3ms TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:18:46,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4412 states. [2021-06-12 19:18:46,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4412 to 3587. [2021-06-12 19:18:46,464 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) [2021-06-12 19:18:46,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3587 states to 3587 states and 9077 transitions. [2021-06-12 19:18:46,472 INFO L78 Accepts]: Start accepts. Automaton has 3587 states and 9077 transitions. Word has length 41 [2021-06-12 19:18:46,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:18:46,472 INFO L482 AbstractCegarLoop]: Abstraction has 3587 states and 9077 transitions. [2021-06-12 19:18:46,472 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) [2021-06-12 19:18:46,472 INFO L276 IsEmpty]: Start isEmpty. Operand 3587 states and 9077 transitions. [2021-06-12 19:18:46,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-12 19:18:46,477 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:18:46,477 INFO L472 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:18:46,690 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable223 [2021-06-12 19:18:46,690 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:18:46,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:18:46,691 INFO L82 PathProgramCache]: Analyzing trace with hash 1364415795, now seen corresponding path program 48 times [2021-06-12 19:18:46,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:18:46,691 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582620032] [2021-06-12 19:18:46,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:18:46,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:18:46,741 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 28 proven. 35 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-12 19:18:46,741 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:18:46,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582620032] [2021-06-12 19:18:46,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582620032] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:18:46,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771246056] [2021-06-12 19:18:46,741 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 [2021-06-12 19:18:46,767 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-12 19:18:46,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:18:46,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 19:18:46,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:18:46,829 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 28 proven. 35 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-12 19:18:46,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1771246056] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:18:46,830 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:18:46,830 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-06-12 19:18:46,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978720207] [2021-06-12 19:18:46,830 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 19:18:46,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:18:46,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 19:18:46,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-06-12 19:18:46,830 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) [2021-06-12 19:18:46,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:18:46,954 INFO L93 Difference]: Finished difference Result 4253 states and 10263 transitions. [2021-06-12 19:18:46,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:18:46,955 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 [2021-06-12 19:18:46,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:18:46,959 INFO L225 Difference]: With dead ends: 4253 [2021-06-12 19:18:46,959 INFO L226 Difference]: Without dead ends: 4235 [2021-06-12 19:18:46,959 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 60.8ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:18:46,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4235 states. [2021-06-12 19:18:46,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4235 to 3587. [2021-06-12 19:18:46,991 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) [2021-06-12 19:18:46,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3587 states to 3587 states and 9067 transitions. [2021-06-12 19:18:46,995 INFO L78 Accepts]: Start accepts. Automaton has 3587 states and 9067 transitions. Word has length 41 [2021-06-12 19:18:46,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:18:46,995 INFO L482 AbstractCegarLoop]: Abstraction has 3587 states and 9067 transitions. [2021-06-12 19:18:46,995 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) [2021-06-12 19:18:46,995 INFO L276 IsEmpty]: Start isEmpty. Operand 3587 states and 9067 transitions. [2021-06-12 19:18:46,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-12 19:18:46,998 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:18:46,998 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:18:47,199 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable225 [2021-06-12 19:18:47,200 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:18:47,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:18:47,200 INFO L82 PathProgramCache]: Analyzing trace with hash -83584218, now seen corresponding path program 49 times [2021-06-12 19:18:47,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:18:47,201 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645087916] [2021-06-12 19:18:47,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:18:47,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:18:47,258 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 14 proven. 49 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:18:47,258 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:18:47,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645087916] [2021-06-12 19:18:47,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645087916] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:18:47,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150989158] [2021-06-12 19:18:47,258 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 [2021-06-12 19:18:47,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:18:47,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:18:47,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:18:47,360 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 9 proven. 54 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:18:47,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [150989158] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:18:47,360 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:18:47,360 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-06-12 19:18:47,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941167667] [2021-06-12 19:18:47,361 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 19:18:47,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:18:47,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 19:18:47,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-06-12 19:18:47,361 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) [2021-06-12 19:18:47,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:18:47,689 INFO L93 Difference]: Finished difference Result 4054 states and 9921 transitions. [2021-06-12 19:18:47,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:18:47,689 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 [2021-06-12 19:18:47,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:18:47,693 INFO L225 Difference]: With dead ends: 4054 [2021-06-12 19:18:47,694 INFO L226 Difference]: Without dead ends: 4016 [2021-06-12 19:18:47,694 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 82.3ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:18:47,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4016 states. [2021-06-12 19:18:47,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4016 to 3593. [2021-06-12 19:18:47,729 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) [2021-06-12 19:18:47,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3593 states to 3593 states and 9070 transitions. [2021-06-12 19:18:47,734 INFO L78 Accepts]: Start accepts. Automaton has 3593 states and 9070 transitions. Word has length 41 [2021-06-12 19:18:47,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:18:47,734 INFO L482 AbstractCegarLoop]: Abstraction has 3593 states and 9070 transitions. [2021-06-12 19:18:47,734 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) [2021-06-12 19:18:47,734 INFO L276 IsEmpty]: Start isEmpty. Operand 3593 states and 9070 transitions. [2021-06-12 19:18:47,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-12 19:18:47,737 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:18:47,737 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:18:47,940 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable228 [2021-06-12 19:18:47,941 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:18:47,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:18:47,941 INFO L82 PathProgramCache]: Analyzing trace with hash -697120398, now seen corresponding path program 50 times [2021-06-12 19:18:47,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:18:47,941 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050511747] [2021-06-12 19:18:47,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:18:47,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:18:48,013 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 11 proven. 50 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-12 19:18:48,013 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:18:48,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050511747] [2021-06-12 19:18:48,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050511747] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:18:48,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573055502] [2021-06-12 19:18:48,013 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 [2021-06-12 19:18:48,049 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:18:48,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:18:48,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:18:48,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:18:48,111 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 51 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-12 19:18:48,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1573055502] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:18:48,111 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:18:48,111 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-12 19:18:48,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128577830] [2021-06-12 19:18:48,111 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 19:18:48,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:18:48,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 19:18:48,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-06-12 19:18:48,112 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) [2021-06-12 19:18:48,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:18:48,354 INFO L93 Difference]: Finished difference Result 4259 states and 10390 transitions. [2021-06-12 19:18:48,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:18:48,354 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 [2021-06-12 19:18:48,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:18:48,358 INFO L225 Difference]: With dead ends: 4259 [2021-06-12 19:18:48,358 INFO L226 Difference]: Without dead ends: 4247 [2021-06-12 19:18:48,358 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 91.5ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:18:48,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4247 states. [2021-06-12 19:18:48,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4247 to 3595. [2021-06-12 19:18:48,408 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) [2021-06-12 19:18:48,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3595 states to 3595 states and 9072 transitions. [2021-06-12 19:18:48,413 INFO L78 Accepts]: Start accepts. Automaton has 3595 states and 9072 transitions. Word has length 41 [2021-06-12 19:18:48,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:18:48,413 INFO L482 AbstractCegarLoop]: Abstraction has 3595 states and 9072 transitions. [2021-06-12 19:18:48,413 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) [2021-06-12 19:18:48,413 INFO L276 IsEmpty]: Start isEmpty. Operand 3595 states and 9072 transitions. [2021-06-12 19:18:48,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-12 19:18:48,416 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:18:48,416 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:18:48,616 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable229,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:18:48,616 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:18:48,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:18:48,617 INFO L82 PathProgramCache]: Analyzing trace with hash 1444796936, now seen corresponding path program 51 times [2021-06-12 19:18:48,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:18:48,617 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362651758] [2021-06-12 19:18:48,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:18:48,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:18:48,677 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:18:48,677 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:18:48,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362651758] [2021-06-12 19:18:48,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362651758] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:18:48,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703559412] [2021-06-12 19:18:48,678 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 [2021-06-12 19:18:48,705 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-12 19:18:48,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:18:48,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:18:48,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:18:48,766 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:18:48,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1703559412] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:18:48,766 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:18:48,766 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-12 19:18:48,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718070612] [2021-06-12 19:18:48,766 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 19:18:48,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:18:48,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 19:18:48,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:18:48,767 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) [2021-06-12 19:18:49,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:18:49,056 INFO L93 Difference]: Finished difference Result 4613 states and 11146 transitions. [2021-06-12 19:18:49,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:18:49,056 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 [2021-06-12 19:18:49,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:18:49,061 INFO L225 Difference]: With dead ends: 4613 [2021-06-12 19:18:49,061 INFO L226 Difference]: Without dead ends: 4601 [2021-06-12 19:18:49,061 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 109.2ms TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:18:49,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4601 states. [2021-06-12 19:18:49,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4601 to 3620. [2021-06-12 19:18:49,097 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) [2021-06-12 19:18:49,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3620 states to 3620 states and 9131 transitions. [2021-06-12 19:18:49,101 INFO L78 Accepts]: Start accepts. Automaton has 3620 states and 9131 transitions. Word has length 41 [2021-06-12 19:18:49,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:18:49,102 INFO L482 AbstractCegarLoop]: Abstraction has 3620 states and 9131 transitions. [2021-06-12 19:18:49,102 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) [2021-06-12 19:18:49,102 INFO L276 IsEmpty]: Start isEmpty. Operand 3620 states and 9131 transitions. [2021-06-12 19:18:49,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-12 19:18:49,105 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:18:49,105 INFO L472 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:18:49,305 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230,122 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:18:49,305 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:18:49,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:18:49,305 INFO L82 PathProgramCache]: Analyzing trace with hash 1206735419, now seen corresponding path program 21 times [2021-06-12 19:18:49,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:18:49,305 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414810094] [2021-06-12 19:18:49,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:18:49,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:18:49,348 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 45 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:18:49,348 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:18:49,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414810094] [2021-06-12 19:18:49,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414810094] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:18:49,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248692263] [2021-06-12 19:18:49,348 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-12 19:18:49,374 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-12 19:18:49,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:18:49,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 19:18:49,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:18:49,434 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 46 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:18:49,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [248692263] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:18:49,434 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:18:49,434 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 9 [2021-06-12 19:18:49,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884067967] [2021-06-12 19:18:49,435 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 19:18:49,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:18:49,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 19:18:49,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:18:49,435 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) [2021-06-12 19:18:49,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:18:49,584 INFO L93 Difference]: Finished difference Result 4855 states and 11693 transitions. [2021-06-12 19:18:49,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:18:49,585 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 [2021-06-12 19:18:49,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:18:49,590 INFO L225 Difference]: With dead ends: 4855 [2021-06-12 19:18:49,590 INFO L226 Difference]: Without dead ends: 4847 [2021-06-12 19:18:49,590 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 51.6ms TimeCoverageRelationStatistics Valid=55, Invalid=77, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:18:49,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4847 states. [2021-06-12 19:18:49,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4847 to 3739. [2021-06-12 19:18:49,634 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) [2021-06-12 19:18:49,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3739 states to 3739 states and 9486 transitions. [2021-06-12 19:18:49,639 INFO L78 Accepts]: Start accepts. Automaton has 3739 states and 9486 transitions. Word has length 41 [2021-06-12 19:18:49,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:18:49,639 INFO L482 AbstractCegarLoop]: Abstraction has 3739 states and 9486 transitions. [2021-06-12 19:18:49,639 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) [2021-06-12 19:18:49,639 INFO L276 IsEmpty]: Start isEmpty. Operand 3739 states and 9486 transitions. [2021-06-12 19:18:49,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-12 19:18:49,642 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:18:49,642 INFO L472 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:18:49,842 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:18:49,843 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:18:49,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:18:49,843 INFO L82 PathProgramCache]: Analyzing trace with hash 584855009, now seen corresponding path program 22 times [2021-06-12 19:18:49,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:18:49,843 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341379418] [2021-06-12 19:18:49,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:18:49,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:18:49,891 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 45 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:18:49,891 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:18:49,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341379418] [2021-06-12 19:18:49,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341379418] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:18:49,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633996968] [2021-06-12 19:18:49,892 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-12 19:18:49,918 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:18:49,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:18:49,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 19:18:49,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:18:50,000 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 46 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:18:50,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1633996968] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:18:50,000 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:18:50,000 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 9 [2021-06-12 19:18:50,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443973245] [2021-06-12 19:18:50,000 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 19:18:50,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:18:50,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 19:18:50,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:18:50,001 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) [2021-06-12 19:18:50,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:18:50,146 INFO L93 Difference]: Finished difference Result 5507 states and 13181 transitions. [2021-06-12 19:18:50,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:18:50,146 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 [2021-06-12 19:18:50,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:18:50,151 INFO L225 Difference]: With dead ends: 5507 [2021-06-12 19:18:50,151 INFO L226 Difference]: Without dead ends: 5507 [2021-06-12 19:18:50,151 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 58.4ms TimeCoverageRelationStatistics Valid=55, Invalid=77, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:18:50,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5507 states. [2021-06-12 19:18:50,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5507 to 3748. [2021-06-12 19:18:50,186 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) [2021-06-12 19:18:50,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3748 states to 3748 states and 9506 transitions. [2021-06-12 19:18:50,190 INFO L78 Accepts]: Start accepts. Automaton has 3748 states and 9506 transitions. Word has length 41 [2021-06-12 19:18:50,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:18:50,190 INFO L482 AbstractCegarLoop]: Abstraction has 3748 states and 9506 transitions. [2021-06-12 19:18:50,190 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) [2021-06-12 19:18:50,190 INFO L276 IsEmpty]: Start isEmpty. Operand 3748 states and 9506 transitions. [2021-06-12 19:18:50,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-12 19:18:50,193 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:18:50,193 INFO L472 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:18:50,393 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable233 [2021-06-12 19:18:50,393 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:18:50,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:18:50,393 INFO L82 PathProgramCache]: Analyzing trace with hash -1052717447, now seen corresponding path program 23 times [2021-06-12 19:18:50,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:18:50,394 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865083331] [2021-06-12 19:18:50,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:18:50,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:18:50,445 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 43 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:18:50,445 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:18:50,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865083331] [2021-06-12 19:18:50,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865083331] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:18:50,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339269173] [2021-06-12 19:18:50,445 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 [2021-06-12 19:18:50,482 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-12 19:18:50,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:18:50,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 19:18:50,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:18:50,588 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 44 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:18:50,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [339269173] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:18:50,588 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:18:50,588 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12] total 15 [2021-06-12 19:18:50,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307637601] [2021-06-12 19:18:50,588 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:18:50,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:18:50,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:18:50,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:18:50,589 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) [2021-06-12 19:18:50,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:18:50,819 INFO L93 Difference]: Finished difference Result 5032 states and 12054 transitions. [2021-06-12 19:18:50,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:18:50,819 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 [2021-06-12 19:18:50,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:18:50,824 INFO L225 Difference]: With dead ends: 5032 [2021-06-12 19:18:50,825 INFO L226 Difference]: Without dead ends: 5032 [2021-06-12 19:18:50,825 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 150.8ms TimeCoverageRelationStatistics Valid=148, Invalid=272, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:18:50,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5032 states. [2021-06-12 19:18:50,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5032 to 3584. [2021-06-12 19:18:50,863 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) [2021-06-12 19:18:50,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3584 states to 3584 states and 9035 transitions. [2021-06-12 19:18:50,867 INFO L78 Accepts]: Start accepts. Automaton has 3584 states and 9035 transitions. Word has length 41 [2021-06-12 19:18:50,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:18:50,867 INFO L482 AbstractCegarLoop]: Abstraction has 3584 states and 9035 transitions. [2021-06-12 19:18:50,867 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) [2021-06-12 19:18:50,867 INFO L276 IsEmpty]: Start isEmpty. Operand 3584 states and 9035 transitions. [2021-06-12 19:18:50,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-12 19:18:50,870 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:18:50,870 INFO L472 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:18:51,070 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable234 [2021-06-12 19:18:51,071 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:18:51,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:18:51,071 INFO L82 PathProgramCache]: Analyzing trace with hash -1317611251, now seen corresponding path program 52 times [2021-06-12 19:18:51,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:18:51,071 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272698922] [2021-06-12 19:18:51,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:18:51,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:18:51,125 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 30 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:18:51,125 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:18:51,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272698922] [2021-06-12 19:18:51,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272698922] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:18:51,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628648146] [2021-06-12 19:18:51,125 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 [2021-06-12 19:18:51,151 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:18:51,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:18:51,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 19:18:51,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:18:51,211 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 30 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:18:51,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [628648146] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:18:51,211 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:18:51,211 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-12 19:18:51,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672752059] [2021-06-12 19:18:51,212 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 19:18:51,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:18:51,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 19:18:51,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:18:51,212 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) [2021-06-12 19:18:51,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:18:51,358 INFO L93 Difference]: Finished difference Result 4100 states and 9963 transitions. [2021-06-12 19:18:51,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:18:51,359 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 [2021-06-12 19:18:51,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:18:51,363 INFO L225 Difference]: With dead ends: 4100 [2021-06-12 19:18:51,363 INFO L226 Difference]: Without dead ends: 4082 [2021-06-12 19:18:51,364 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 72.4ms TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:18:51,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4082 states. [2021-06-12 19:18:51,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4082 to 3584. [2021-06-12 19:18:51,400 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) [2021-06-12 19:18:51,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3584 states to 3584 states and 9030 transitions. [2021-06-12 19:18:51,405 INFO L78 Accepts]: Start accepts. Automaton has 3584 states and 9030 transitions. Word has length 41 [2021-06-12 19:18:51,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:18:51,405 INFO L482 AbstractCegarLoop]: Abstraction has 3584 states and 9030 transitions. [2021-06-12 19:18:51,405 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) [2021-06-12 19:18:51,405 INFO L276 IsEmpty]: Start isEmpty. Operand 3584 states and 9030 transitions. [2021-06-12 19:18:51,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-12 19:18:51,408 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:18:51,408 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:18:51,609 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2021-06-12 19:18:51,609 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:18:51,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:18:51,609 INFO L82 PathProgramCache]: Analyzing trace with hash 1869360074, now seen corresponding path program 24 times [2021-06-12 19:18:51,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:18:51,609 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567042766] [2021-06-12 19:18:51,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:18:51,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:18:51,672 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 6 proven. 57 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:18:51,673 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:18:51,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567042766] [2021-06-12 19:18:51,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567042766] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:18:51,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765002633] [2021-06-12 19:18:51,673 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 [2021-06-12 19:18:51,700 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-06-12 19:18:51,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:18:51,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:18:51,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:18:51,758 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 5 proven. 58 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:18:51,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765002633] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:18:51,759 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:18:51,759 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-12 19:18:51,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313810910] [2021-06-12 19:18:51,759 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 19:18:51,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:18:51,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 19:18:51,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-06-12 19:18:51,760 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) [2021-06-12 19:18:52,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:18:52,022 INFO L93 Difference]: Finished difference Result 4419 states and 10697 transitions. [2021-06-12 19:18:52,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:18:52,022 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 [2021-06-12 19:18:52,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:18:52,026 INFO L225 Difference]: With dead ends: 4419 [2021-06-12 19:18:52,026 INFO L226 Difference]: Without dead ends: 4397 [2021-06-12 19:18:52,026 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 91.9ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:18:52,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4397 states. [2021-06-12 19:18:52,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4397 to 3612. [2021-06-12 19:18:52,074 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) [2021-06-12 19:18:52,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3612 states to 3612 states and 9102 transitions. [2021-06-12 19:18:52,080 INFO L78 Accepts]: Start accepts. Automaton has 3612 states and 9102 transitions. Word has length 41 [2021-06-12 19:18:52,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:18:52,080 INFO L482 AbstractCegarLoop]: Abstraction has 3612 states and 9102 transitions. [2021-06-12 19:18:52,080 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) [2021-06-12 19:18:52,080 INFO L276 IsEmpty]: Start isEmpty. Operand 3612 states and 9102 transitions. [2021-06-12 19:18:52,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-12 19:18:52,083 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:18:52,083 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:18:52,284 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable239 [2021-06-12 19:18:52,284 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:18:52,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:18:52,284 INFO L82 PathProgramCache]: Analyzing trace with hash -925274230, now seen corresponding path program 53 times [2021-06-12 19:18:52,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:18:52,284 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91750994] [2021-06-12 19:18:52,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:18:52,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:18:52,341 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 14 proven. 49 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:18:52,342 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:18:52,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91750994] [2021-06-12 19:18:52,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91750994] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:18:52,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479577202] [2021-06-12 19:18:52,342 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 [2021-06-12 19:18:52,371 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-06-12 19:18:52,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:18:52,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:18:52,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:18:52,461 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 9 proven. 54 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:18:52,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1479577202] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:18:52,461 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:18:52,461 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-06-12 19:18:52,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848479298] [2021-06-12 19:18:52,461 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 19:18:52,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:18:52,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 19:18:52,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-06-12 19:18:52,462 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) [2021-06-12 19:18:52,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:18:52,848 INFO L93 Difference]: Finished difference Result 4113 states and 10023 transitions. [2021-06-12 19:18:52,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:18:52,849 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 [2021-06-12 19:18:52,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:18:52,853 INFO L225 Difference]: With dead ends: 4113 [2021-06-12 19:18:52,853 INFO L226 Difference]: Without dead ends: 4057 [2021-06-12 19:18:52,853 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 86.4ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:18:52,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4057 states. [2021-06-12 19:18:52,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4057 to 3639. [2021-06-12 19:18:52,892 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) [2021-06-12 19:18:52,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3639 states to 3639 states and 9148 transitions. [2021-06-12 19:18:52,897 INFO L78 Accepts]: Start accepts. Automaton has 3639 states and 9148 transitions. Word has length 41 [2021-06-12 19:18:52,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:18:52,897 INFO L482 AbstractCegarLoop]: Abstraction has 3639 states and 9148 transitions. [2021-06-12 19:18:52,897 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) [2021-06-12 19:18:52,897 INFO L276 IsEmpty]: Start isEmpty. Operand 3639 states and 9148 transitions. [2021-06-12 19:18:52,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-12 19:18:52,901 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:18:52,901 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:18:53,101 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,128 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:18:53,101 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:18:53,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:18:53,102 INFO L82 PathProgramCache]: Analyzing trace with hash -1538810410, now seen corresponding path program 54 times [2021-06-12 19:18:53,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:18:53,102 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977822503] [2021-06-12 19:18:53,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:18:53,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:18:53,161 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 11 proven. 50 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-12 19:18:53,161 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:18:53,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977822503] [2021-06-12 19:18:53,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977822503] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:18:53,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94300671] [2021-06-12 19:18:53,161 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 [2021-06-12 19:18:53,192 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-06-12 19:18:53,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:18:53,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:18:53,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:18:53,253 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 51 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-12 19:18:53,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [94300671] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:18:53,254 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:18:53,254 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-12 19:18:53,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013882118] [2021-06-12 19:18:53,254 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 19:18:53,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:18:53,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 19:18:53,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-06-12 19:18:53,254 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) [2021-06-12 19:18:53,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:18:53,481 INFO L93 Difference]: Finished difference Result 4375 states and 10599 transitions. [2021-06-12 19:18:53,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:18:53,482 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 [2021-06-12 19:18:53,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:18:53,486 INFO L225 Difference]: With dead ends: 4375 [2021-06-12 19:18:53,486 INFO L226 Difference]: Without dead ends: 4363 [2021-06-12 19:18:53,486 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 83.3ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:18:53,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4363 states. [2021-06-12 19:18:53,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4363 to 3649. [2021-06-12 19:18:53,519 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) [2021-06-12 19:18:53,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3649 states to 3649 states and 9168 transitions. [2021-06-12 19:18:53,523 INFO L78 Accepts]: Start accepts. Automaton has 3649 states and 9168 transitions. Word has length 41 [2021-06-12 19:18:53,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:18:53,523 INFO L482 AbstractCegarLoop]: Abstraction has 3649 states and 9168 transitions. [2021-06-12 19:18:53,523 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) [2021-06-12 19:18:53,523 INFO L276 IsEmpty]: Start isEmpty. Operand 3649 states and 9168 transitions. [2021-06-12 19:18:53,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-12 19:18:53,526 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:18:53,526 INFO L472 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:18:53,726 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable241,129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:18:53,727 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:18:53,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:18:53,727 INFO L82 PathProgramCache]: Analyzing trace with hash -1696109897, now seen corresponding path program 25 times [2021-06-12 19:18:53,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:18:53,727 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013661522] [2021-06-12 19:18:53,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:18:53,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:18:53,770 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 40 proven. 26 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:18:53,771 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:18:53,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013661522] [2021-06-12 19:18:53,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013661522] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:18:53,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566401346] [2021-06-12 19:18:53,771 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 [2021-06-12 19:18:53,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:18:53,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 19:18:53,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:18:53,855 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 42 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:18:53,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1566401346] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:18:53,856 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:18:53,856 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 9 [2021-06-12 19:18:53,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247299479] [2021-06-12 19:18:53,856 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 19:18:53,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:18:53,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 19:18:53,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:18:53,856 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) [2021-06-12 19:18:53,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:18:53,995 INFO L93 Difference]: Finished difference Result 4653 states and 11200 transitions. [2021-06-12 19:18:53,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:18:53,996 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 [2021-06-12 19:18:53,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:18:54,000 INFO L225 Difference]: With dead ends: 4653 [2021-06-12 19:18:54,000 INFO L226 Difference]: Without dead ends: 4643 [2021-06-12 19:18:54,001 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 61.2ms TimeCoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:18:54,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4643 states. [2021-06-12 19:18:54,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4643 to 3759. [2021-06-12 19:18:54,039 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) [2021-06-12 19:18:54,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3759 states to 3759 states and 9460 transitions. [2021-06-12 19:18:54,044 INFO L78 Accepts]: Start accepts. Automaton has 3759 states and 9460 transitions. Word has length 41 [2021-06-12 19:18:54,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:18:54,044 INFO L482 AbstractCegarLoop]: Abstraction has 3759 states and 9460 transitions. [2021-06-12 19:18:54,044 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) [2021-06-12 19:18:54,044 INFO L276 IsEmpty]: Start isEmpty. Operand 3759 states and 9460 transitions. [2021-06-12 19:18:54,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-12 19:18:54,047 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:18:54,047 INFO L472 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:18:54,247 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable242,130 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:18:54,247 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:18:54,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:18:54,247 INFO L82 PathProgramCache]: Analyzing trace with hash 1107799383, now seen corresponding path program 55 times [2021-06-12 19:18:54,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:18:54,248 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704568553] [2021-06-12 19:18:54,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:18:54,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:18:54,292 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 22 proven. 43 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:18:54,292 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:18:54,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704568553] [2021-06-12 19:18:54,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704568553] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:18:54,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496161463] [2021-06-12 19:18:54,293 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 [2021-06-12 19:18:54,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:18:54,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 19:18:54,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:18:54,373 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 22 proven. 43 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:18:54,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1496161463] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:18:54,373 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:18:54,373 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-06-12 19:18:54,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157688420] [2021-06-12 19:18:54,373 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 19:18:54,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:18:54,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 19:18:54,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-06-12 19:18:54,374 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) [2021-06-12 19:18:54,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:18:54,494 INFO L93 Difference]: Finished difference Result 4425 states and 10642 transitions. [2021-06-12 19:18:54,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:18:54,494 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 [2021-06-12 19:18:54,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:18:54,499 INFO L225 Difference]: With dead ends: 4425 [2021-06-12 19:18:54,500 INFO L226 Difference]: Without dead ends: 4407 [2021-06-12 19:18:54,500 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 55.5ms TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:18:54,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4407 states. [2021-06-12 19:18:54,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4407 to 3746. [2021-06-12 19:18:54,543 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) [2021-06-12 19:18:54,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3746 states to 3746 states and 9409 transitions. [2021-06-12 19:18:54,549 INFO L78 Accepts]: Start accepts. Automaton has 3746 states and 9409 transitions. Word has length 41 [2021-06-12 19:18:54,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:18:54,549 INFO L482 AbstractCegarLoop]: Abstraction has 3746 states and 9409 transitions. [2021-06-12 19:18:54,549 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) [2021-06-12 19:18:54,550 INFO L276 IsEmpty]: Start isEmpty. Operand 3746 states and 9409 transitions. [2021-06-12 19:18:54,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-12 19:18:54,553 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:18:54,553 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:18:54,753 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable245,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:18:54,754 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:18:54,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:18:54,754 INFO L82 PathProgramCache]: Analyzing trace with hash 603106924, now seen corresponding path program 56 times [2021-06-12 19:18:54,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:18:54,754 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16021072] [2021-06-12 19:18:54,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:18:54,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:18:54,824 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 11 proven. 52 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:18:54,824 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:18:54,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16021072] [2021-06-12 19:18:54,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16021072] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:18:54,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511148946] [2021-06-12 19:18:54,824 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 [2021-06-12 19:18:54,850 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:18:54,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:18:54,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:18:54,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:18:54,908 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 53 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:18:54,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [511148946] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:18:54,908 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:18:54,908 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-12 19:18:54,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067454004] [2021-06-12 19:18:54,908 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 19:18:54,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:18:54,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 19:18:54,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:18:54,909 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) [2021-06-12 19:18:55,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:18:55,253 INFO L93 Difference]: Finished difference Result 5163 states and 12313 transitions. [2021-06-12 19:18:55,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 19:18:55,254 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 [2021-06-12 19:18:55,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:18:55,259 INFO L225 Difference]: With dead ends: 5163 [2021-06-12 19:18:55,260 INFO L226 Difference]: Without dead ends: 5121 [2021-06-12 19:18:55,260 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 124.3ms TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:18:55,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5121 states. [2021-06-12 19:18:55,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5121 to 3767. [2021-06-12 19:18:55,307 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) [2021-06-12 19:18:55,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3767 states to 3767 states and 9465 transitions. [2021-06-12 19:18:55,313 INFO L78 Accepts]: Start accepts. Automaton has 3767 states and 9465 transitions. Word has length 41 [2021-06-12 19:18:55,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:18:55,313 INFO L482 AbstractCegarLoop]: Abstraction has 3767 states and 9465 transitions. [2021-06-12 19:18:55,313 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) [2021-06-12 19:18:55,313 INFO L276 IsEmpty]: Start isEmpty. Operand 3767 states and 9465 transitions. [2021-06-12 19:18:55,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-12 19:18:55,316 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:18:55,316 INFO L472 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:18:55,517 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable248 [2021-06-12 19:18:55,517 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:18:55,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:18:55,517 INFO L82 PathProgramCache]: Analyzing trace with hash 2135666033, now seen corresponding path program 57 times [2021-06-12 19:18:55,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:18:55,517 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228662169] [2021-06-12 19:18:55,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:18:55,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:18:55,584 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 21 proven. 45 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:18:55,584 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:18:55,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228662169] [2021-06-12 19:18:55,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228662169] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:18:55,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286299950] [2021-06-12 19:18:55,584 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-12 19:18:55,610 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-12 19:18:55,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:18:55,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 19:18:55,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:18:55,681 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 21 proven. 45 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:18:55,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [286299950] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:18:55,681 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:18:55,681 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-12 19:18:55,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472871562] [2021-06-12 19:18:55,681 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 19:18:55,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:18:55,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 19:18:55,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:18:55,681 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) [2021-06-12 19:18:55,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:18:55,829 INFO L93 Difference]: Finished difference Result 4453 states and 10682 transitions. [2021-06-12 19:18:55,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:18:55,829 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 [2021-06-12 19:18:55,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:18:55,834 INFO L225 Difference]: With dead ends: 4453 [2021-06-12 19:18:55,834 INFO L226 Difference]: Without dead ends: 4429 [2021-06-12 19:18:55,834 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 76.6ms TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:18:55,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4429 states. [2021-06-12 19:18:55,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4429 to 3631. [2021-06-12 19:18:55,868 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) [2021-06-12 19:18:55,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3631 states to 3631 states and 9072 transitions. [2021-06-12 19:18:55,872 INFO L78 Accepts]: Start accepts. Automaton has 3631 states and 9072 transitions. Word has length 41 [2021-06-12 19:18:55,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:18:55,872 INFO L482 AbstractCegarLoop]: Abstraction has 3631 states and 9072 transitions. [2021-06-12 19:18:55,872 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) [2021-06-12 19:18:55,872 INFO L276 IsEmpty]: Start isEmpty. Operand 3631 states and 9072 transitions. [2021-06-12 19:18:55,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-12 19:18:55,875 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:18:55,875 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:18:56,075 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable249 [2021-06-12 19:18:56,075 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:18:56,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:18:56,076 INFO L82 PathProgramCache]: Analyzing trace with hash 757943458, now seen corresponding path program 58 times [2021-06-12 19:18:56,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:18:56,076 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092796444] [2021-06-12 19:18:56,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:18:56,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:18:56,140 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:18:56,140 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:18:56,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092796444] [2021-06-12 19:18:56,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092796444] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:18:56,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736325125] [2021-06-12 19:18:56,141 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 [2021-06-12 19:18:56,166 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:18:56,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:18:56,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:18:56,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:18:56,224 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:18:56,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [736325125] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:18:56,224 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:18:56,224 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-12 19:18:56,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492214646] [2021-06-12 19:18:56,224 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:18:56,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:18:56,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:18:56,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:18:56,225 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) [2021-06-12 19:18:56,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:18:56,585 INFO L93 Difference]: Finished difference Result 4939 states and 11659 transitions. [2021-06-12 19:18:56,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:18:56,585 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 [2021-06-12 19:18:56,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:18:56,591 INFO L225 Difference]: With dead ends: 4939 [2021-06-12 19:18:56,591 INFO L226 Difference]: Without dead ends: 4885 [2021-06-12 19:18:56,591 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 135.5ms TimeCoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:18:56,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4885 states. [2021-06-12 19:18:56,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4885 to 3618. [2021-06-12 19:18:56,629 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) [2021-06-12 19:18:56,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3618 states to 3618 states and 9020 transitions. [2021-06-12 19:18:56,634 INFO L78 Accepts]: Start accepts. Automaton has 3618 states and 9020 transitions. Word has length 41 [2021-06-12 19:18:56,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:18:56,634 INFO L482 AbstractCegarLoop]: Abstraction has 3618 states and 9020 transitions. [2021-06-12 19:18:56,634 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) [2021-06-12 19:18:56,634 INFO L276 IsEmpty]: Start isEmpty. Operand 3618 states and 9020 transitions. [2021-06-12 19:18:56,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-12 19:18:56,637 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:18:56,637 INFO L472 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:18:56,837 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable253,134 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:18:56,838 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:18:56,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:18:56,838 INFO L82 PathProgramCache]: Analyzing trace with hash -101998469, now seen corresponding path program 26 times [2021-06-12 19:18:56,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:18:56,838 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580997547] [2021-06-12 19:18:56,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:18:56,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:18:56,890 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 52 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:18:56,890 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:18:56,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580997547] [2021-06-12 19:18:56,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580997547] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:18:56,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702984649] [2021-06-12 19:18:56,890 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 [2021-06-12 19:18:56,916 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:18:56,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:18:56,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 19:18:56,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:18:56,978 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 53 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:18:56,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [702984649] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:18:56,979 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:18:56,979 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 9 [2021-06-12 19:18:56,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119018016] [2021-06-12 19:18:56,979 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 19:18:56,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:18:56,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 19:18:56,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:18:56,979 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) [2021-06-12 19:18:57,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:18:57,146 INFO L93 Difference]: Finished difference Result 5763 states and 13661 transitions. [2021-06-12 19:18:57,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:18:57,146 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 [2021-06-12 19:18:57,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:18:57,152 INFO L225 Difference]: With dead ends: 5763 [2021-06-12 19:18:57,153 INFO L226 Difference]: Without dead ends: 5763 [2021-06-12 19:18:57,153 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 65.3ms TimeCoverageRelationStatistics Valid=66, Invalid=90, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:18:57,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5763 states. [2021-06-12 19:18:57,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5763 to 3703. [2021-06-12 19:18:57,203 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) [2021-06-12 19:18:57,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3703 states to 3703 states and 9278 transitions. [2021-06-12 19:18:57,209 INFO L78 Accepts]: Start accepts. Automaton has 3703 states and 9278 transitions. Word has length 41 [2021-06-12 19:18:57,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:18:57,209 INFO L482 AbstractCegarLoop]: Abstraction has 3703 states and 9278 transitions. [2021-06-12 19:18:57,209 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) [2021-06-12 19:18:57,209 INFO L276 IsEmpty]: Start isEmpty. Operand 3703 states and 9278 transitions. [2021-06-12 19:18:57,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-12 19:18:57,213 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:18:57,213 INFO L472 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:18:57,413 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable254,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:18:57,413 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:18:57,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:18:57,414 INFO L82 PathProgramCache]: Analyzing trace with hash -1739570925, now seen corresponding path program 27 times [2021-06-12 19:18:57,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:18:57,414 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206011125] [2021-06-12 19:18:57,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:18:57,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:18:57,480 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 51 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:18:57,480 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:18:57,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206011125] [2021-06-12 19:18:57,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206011125] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:18:57,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971161270] [2021-06-12 19:18:57,480 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 [2021-06-12 19:18:57,507 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-12 19:18:57,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:18:57,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 19:18:57,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:18:57,572 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 52 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:18:57,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1971161270] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:18:57,572 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:18:57,572 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 10 [2021-06-12 19:18:57,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931657419] [2021-06-12 19:18:57,572 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:18:57,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:18:57,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:18:57,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:18:57,573 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) [2021-06-12 19:18:57,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:18:57,765 INFO L93 Difference]: Finished difference Result 5686 states and 13483 transitions. [2021-06-12 19:18:57,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:18:57,765 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 [2021-06-12 19:18:57,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:18:57,771 INFO L225 Difference]: With dead ends: 5686 [2021-06-12 19:18:57,771 INFO L226 Difference]: Without dead ends: 5686 [2021-06-12 19:18:57,771 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 100.0ms TimeCoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:18:57,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5686 states. [2021-06-12 19:18:57,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5686 to 3719. [2021-06-12 19:18:57,812 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) [2021-06-12 19:18:57,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3719 states to 3719 states and 9325 transitions. [2021-06-12 19:18:57,817 INFO L78 Accepts]: Start accepts. Automaton has 3719 states and 9325 transitions. Word has length 41 [2021-06-12 19:18:57,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:18:57,817 INFO L482 AbstractCegarLoop]: Abstraction has 3719 states and 9325 transitions. [2021-06-12 19:18:57,817 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) [2021-06-12 19:18:57,817 INFO L276 IsEmpty]: Start isEmpty. Operand 3719 states and 9325 transitions. [2021-06-12 19:18:57,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-12 19:18:57,820 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:18:57,820 INFO L472 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:18:58,020 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable255 [2021-06-12 19:18:58,020 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:18:58,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:18:58,021 INFO L82 PathProgramCache]: Analyzing trace with hash 865401207, now seen corresponding path program 28 times [2021-06-12 19:18:58,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:18:58,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996909223] [2021-06-12 19:18:58,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:18:58,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:18:58,101 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 44 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:18:58,101 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:18:58,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996909223] [2021-06-12 19:18:58,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996909223] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:18:58,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309276559] [2021-06-12 19:18:58,101 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-12 19:18:58,129 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:18:58,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:18:58,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 19:18:58,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:18:58,195 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 45 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:18:58,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1309276559] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:18:58,195 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:18:58,195 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 11 [2021-06-12 19:18:58,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958185114] [2021-06-12 19:18:58,195 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 19:18:58,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:18:58,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 19:18:58,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:18:58,195 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) [2021-06-12 19:18:58,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:18:58,383 INFO L93 Difference]: Finished difference Result 4882 states and 11625 transitions. [2021-06-12 19:18:58,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:18:58,384 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 [2021-06-12 19:18:58,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:18:58,388 INFO L225 Difference]: With dead ends: 4882 [2021-06-12 19:18:58,388 INFO L226 Difference]: Without dead ends: 4882 [2021-06-12 19:18:58,388 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 101.8ms TimeCoverageRelationStatistics Valid=103, Invalid=169, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:18:58,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4882 states. [2021-06-12 19:18:58,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4882 to 3551. [2021-06-12 19:18:58,425 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) [2021-06-12 19:18:58,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3551 states to 3551 states and 8903 transitions. [2021-06-12 19:18:58,430 INFO L78 Accepts]: Start accepts. Automaton has 3551 states and 8903 transitions. Word has length 41 [2021-06-12 19:18:58,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:18:58,430 INFO L482 AbstractCegarLoop]: Abstraction has 3551 states and 8903 transitions. [2021-06-12 19:18:58,430 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) [2021-06-12 19:18:58,430 INFO L276 IsEmpty]: Start isEmpty. Operand 3551 states and 8903 transitions. [2021-06-12 19:18:58,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-12 19:18:58,432 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:18:58,432 INFO L472 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:18:58,633 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable256 [2021-06-12 19:18:58,633 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:18:58,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:18:58,633 INFO L82 PathProgramCache]: Analyzing trace with hash 1144546135, now seen corresponding path program 59 times [2021-06-12 19:18:58,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:18:58,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273649134] [2021-06-12 19:18:58,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:18:58,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:18:58,698 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 26 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:18:58,699 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:18:58,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273649134] [2021-06-12 19:18:58,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273649134] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:18:58,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861455309] [2021-06-12 19:18:58,699 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 [2021-06-12 19:18:58,725 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-12 19:18:58,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:18:58,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 19:18:58,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:18:58,809 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 27 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:18:58,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [861455309] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:18:58,809 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:18:58,809 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 13 [2021-06-12 19:18:58,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431956578] [2021-06-12 19:18:58,810 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:18:58,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:18:58,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:18:58,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:18:58,810 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) [2021-06-12 19:18:59,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:18:59,043 INFO L93 Difference]: Finished difference Result 4193 states and 10086 transitions. [2021-06-12 19:18:59,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:18:59,043 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 [2021-06-12 19:18:59,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:18:59,047 INFO L225 Difference]: With dead ends: 4193 [2021-06-12 19:18:59,048 INFO L226 Difference]: Without dead ends: 4166 [2021-06-12 19:18:59,048 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 104.7ms TimeCoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:18:59,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4166 states. [2021-06-12 19:18:59,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4166 to 3551. [2021-06-12 19:18:59,085 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) [2021-06-12 19:18:59,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3551 states to 3551 states and 8900 transitions. [2021-06-12 19:18:59,090 INFO L78 Accepts]: Start accepts. Automaton has 3551 states and 8900 transitions. Word has length 41 [2021-06-12 19:18:59,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:18:59,090 INFO L482 AbstractCegarLoop]: Abstraction has 3551 states and 8900 transitions. [2021-06-12 19:18:59,090 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) [2021-06-12 19:18:59,090 INFO L276 IsEmpty]: Start isEmpty. Operand 3551 states and 8900 transitions. [2021-06-12 19:18:59,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-12 19:18:59,093 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:18:59,093 INFO L472 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:18:59,293 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable257 [2021-06-12 19:18:59,294 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:18:59,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:18:59,294 INFO L82 PathProgramCache]: Analyzing trace with hash -245347661, now seen corresponding path program 60 times [2021-06-12 19:18:59,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:18:59,294 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770062662] [2021-06-12 19:18:59,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:18:59,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:18:59,340 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 24 proven. 39 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-12 19:18:59,340 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:18:59,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770062662] [2021-06-12 19:18:59,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770062662] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:18:59,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434397795] [2021-06-12 19:18:59,341 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 [2021-06-12 19:18:59,390 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-06-12 19:18:59,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:18:59,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 19:18:59,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:18:59,448 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 24 proven. 39 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-12 19:18:59,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434397795] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:18:59,448 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:18:59,448 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-06-12 19:18:59,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530322462] [2021-06-12 19:18:59,448 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 19:18:59,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:18:59,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 19:18:59,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-06-12 19:18:59,449 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) [2021-06-12 19:18:59,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:18:59,571 INFO L93 Difference]: Finished difference Result 4381 states and 10397 transitions. [2021-06-12 19:18:59,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:18:59,571 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 [2021-06-12 19:18:59,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:18:59,576 INFO L225 Difference]: With dead ends: 4381 [2021-06-12 19:18:59,576 INFO L226 Difference]: Without dead ends: 4363 [2021-06-12 19:18:59,576 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 58.9ms TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:18:59,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4363 states. [2021-06-12 19:18:59,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4363 to 3551. [2021-06-12 19:18:59,614 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) [2021-06-12 19:18:59,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3551 states to 3551 states and 8882 transitions. [2021-06-12 19:18:59,619 INFO L78 Accepts]: Start accepts. Automaton has 3551 states and 8882 transitions. Word has length 41 [2021-06-12 19:18:59,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:18:59,619 INFO L482 AbstractCegarLoop]: Abstraction has 3551 states and 8882 transitions. [2021-06-12 19:18:59,619 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) [2021-06-12 19:18:59,619 INFO L276 IsEmpty]: Start isEmpty. Operand 3551 states and 8882 transitions. [2021-06-12 19:18:59,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-12 19:18:59,622 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:18:59,622 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:18:59,822 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable262,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:18:59,822 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:18:59,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:18:59,823 INFO L82 PathProgramCache]: Analyzing trace with hash -1693347674, now seen corresponding path program 61 times [2021-06-12 19:18:59,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:18:59,823 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165839166] [2021-06-12 19:18:59,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:18:59,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:18:59,888 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 14 proven. 49 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:18:59,888 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:18:59,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165839166] [2021-06-12 19:18:59,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [165839166] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:18:59,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135154202] [2021-06-12 19:18:59,888 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 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 [2021-06-12 19:18:59,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:18:59,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:18:59,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:19:00,013 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 9 proven. 54 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:19:00,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [135154202] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:19:00,013 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:19:00,013 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-06-12 19:19:00,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308981330] [2021-06-12 19:19:00,013 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 19:19:00,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:19:00,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 19:19:00,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-06-12 19:19:00,014 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) [2021-06-12 19:19:00,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:19:00,350 INFO L93 Difference]: Finished difference Result 4355 states and 10366 transitions. [2021-06-12 19:19:00,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:19:00,350 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 [2021-06-12 19:19:00,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:19:00,354 INFO L225 Difference]: With dead ends: 4355 [2021-06-12 19:19:00,354 INFO L226 Difference]: Without dead ends: 4156 [2021-06-12 19:19:00,354 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 88.2ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:19:00,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4156 states. [2021-06-12 19:19:00,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4156 to 3529. [2021-06-12 19:19:00,386 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) [2021-06-12 19:19:00,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3529 states to 3529 states and 8764 transitions. [2021-06-12 19:19:00,392 INFO L78 Accepts]: Start accepts. Automaton has 3529 states and 8764 transitions. Word has length 41 [2021-06-12 19:19:00,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:19:00,392 INFO L482 AbstractCegarLoop]: Abstraction has 3529 states and 8764 transitions. [2021-06-12 19:19:00,392 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) [2021-06-12 19:19:00,392 INFO L276 IsEmpty]: Start isEmpty. Operand 3529 states and 8764 transitions. [2021-06-12 19:19:00,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-12 19:19:00,396 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:19:00,396 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:19:00,609 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable265 [2021-06-12 19:19:00,610 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:19:00,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:19:00,610 INFO L82 PathProgramCache]: Analyzing trace with hash 1988083442, now seen corresponding path program 62 times [2021-06-12 19:19:00,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:19:00,610 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16261367] [2021-06-12 19:19:00,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:19:00,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:19:00,670 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 11 proven. 50 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-12 19:19:00,671 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:19:00,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16261367] [2021-06-12 19:19:00,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16261367] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:19:00,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403088652] [2021-06-12 19:19:00,671 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 [2021-06-12 19:19:00,696 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:19:00,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:19:00,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:19:00,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:19:00,776 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 51 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-12 19:19:00,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [403088652] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:19:00,776 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:19:00,776 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-12 19:19:00,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654799413] [2021-06-12 19:19:00,776 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 19:19:00,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:19:00,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 19:19:00,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-06-12 19:19:00,777 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) [2021-06-12 19:19:01,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:19:01,018 INFO L93 Difference]: Finished difference Result 4389 states and 10491 transitions. [2021-06-12 19:19:01,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:19:01,018 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 [2021-06-12 19:19:01,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:19:01,022 INFO L225 Difference]: With dead ends: 4389 [2021-06-12 19:19:01,023 INFO L226 Difference]: Without dead ends: 4377 [2021-06-12 19:19:01,023 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 100.0ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:19:01,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4377 states. [2021-06-12 19:19:01,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4377 to 3601. [2021-06-12 19:19:01,056 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) [2021-06-12 19:19:01,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3601 states to 3601 states and 8935 transitions. [2021-06-12 19:19:01,060 INFO L78 Accepts]: Start accepts. Automaton has 3601 states and 8935 transitions. Word has length 41 [2021-06-12 19:19:01,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:19:01,061 INFO L482 AbstractCegarLoop]: Abstraction has 3601 states and 8935 transitions. [2021-06-12 19:19:01,061 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) [2021-06-12 19:19:01,061 INFO L276 IsEmpty]: Start isEmpty. Operand 3601 states and 8935 transitions. [2021-06-12 19:19:01,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-12 19:19:01,063 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:19:01,063 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:19:01,264 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable266,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:19:01,264 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:19:01,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:19:01,264 INFO L82 PathProgramCache]: Analyzing trace with hash -164966520, now seen corresponding path program 63 times [2021-06-12 19:19:01,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:19:01,264 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783824667] [2021-06-12 19:19:01,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:19:01,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:19:01,320 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 11 proven. 52 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:19:01,320 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:19:01,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783824667] [2021-06-12 19:19:01,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783824667] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:19:01,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127584848] [2021-06-12 19:19:01,321 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 [2021-06-12 19:19:01,347 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-12 19:19:01,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:19:01,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:19:01,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:19:01,406 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 53 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:19:01,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127584848] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:19:01,406 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:19:01,406 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-12 19:19:01,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227723875] [2021-06-12 19:19:01,406 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 19:19:01,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:19:01,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 19:19:01,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:19:01,407 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) [2021-06-12 19:19:01,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:19:01,755 INFO L93 Difference]: Finished difference Result 5587 states and 13170 transitions. [2021-06-12 19:19:01,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 19:19:01,755 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 [2021-06-12 19:19:01,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:19:01,761 INFO L225 Difference]: With dead ends: 5587 [2021-06-12 19:19:01,762 INFO L226 Difference]: Without dead ends: 5533 [2021-06-12 19:19:01,762 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 136.9ms TimeCoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:19:01,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5533 states. [2021-06-12 19:19:01,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5533 to 3793. [2021-06-12 19:19:01,808 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) [2021-06-12 19:19:01,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3793 states to 3793 states and 9441 transitions. [2021-06-12 19:19:01,813 INFO L78 Accepts]: Start accepts. Automaton has 3793 states and 9441 transitions. Word has length 41 [2021-06-12 19:19:01,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:19:01,813 INFO L482 AbstractCegarLoop]: Abstraction has 3793 states and 9441 transitions. [2021-06-12 19:19:01,813 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) [2021-06-12 19:19:01,813 INFO L276 IsEmpty]: Start isEmpty. Operand 3793 states and 9441 transitions. [2021-06-12 19:19:01,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-12 19:19:01,816 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:19:01,816 INFO L472 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:19:02,016 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable267 [2021-06-12 19:19:02,016 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:19:02,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:19:02,017 INFO L82 PathProgramCache]: Analyzing trace with hash 1367592589, now seen corresponding path program 64 times [2021-06-12 19:19:02,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:19:02,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534444880] [2021-06-12 19:19:02,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:19:02,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:19:02,067 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 19 proven. 47 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:19:02,067 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:19:02,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534444880] [2021-06-12 19:19:02,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534444880] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:19:02,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947582049] [2021-06-12 19:19:02,067 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-12 19:19:02,091 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:19:02,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:19:02,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 19:19:02,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:19:02,155 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 19 proven. 47 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:19:02,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1947582049] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:19:02,155 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:19:02,155 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-12 19:19:02,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392748932] [2021-06-12 19:19:02,156 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 19:19:02,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:19:02,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 19:19:02,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:19:02,156 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) [2021-06-12 19:19:02,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:19:02,284 INFO L93 Difference]: Finished difference Result 4607 states and 10909 transitions. [2021-06-12 19:19:02,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:19:02,284 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 [2021-06-12 19:19:02,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:19:02,289 INFO L225 Difference]: With dead ends: 4607 [2021-06-12 19:19:02,289 INFO L226 Difference]: Without dead ends: 4583 [2021-06-12 19:19:02,289 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 63.9ms TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:19:02,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4583 states. [2021-06-12 19:19:02,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4583 to 3793. [2021-06-12 19:19:02,323 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) [2021-06-12 19:19:02,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3793 states to 3793 states and 9425 transitions. [2021-06-12 19:19:02,328 INFO L78 Accepts]: Start accepts. Automaton has 3793 states and 9425 transitions. Word has length 41 [2021-06-12 19:19:02,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:19:02,328 INFO L482 AbstractCegarLoop]: Abstraction has 3793 states and 9425 transitions. [2021-06-12 19:19:02,328 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) [2021-06-12 19:19:02,328 INFO L276 IsEmpty]: Start isEmpty. Operand 3793 states and 9425 transitions. [2021-06-12 19:19:02,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-12 19:19:02,330 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:19:02,331 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:19:02,532 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable268 [2021-06-12 19:19:02,532 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:19:02,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:19:02,532 INFO L82 PathProgramCache]: Analyzing trace with hash -10129986, now seen corresponding path program 65 times [2021-06-12 19:19:02,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:19:02,533 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680776620] [2021-06-12 19:19:02,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:19:02,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:19:02,597 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 11 proven. 52 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:19:02,597 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:19:02,597 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680776620] [2021-06-12 19:19:02,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680776620] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:19:02,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342629279] [2021-06-12 19:19:02,598 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-12 19:19:02,625 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-06-12 19:19:02,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:19:02,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:19:02,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:19:02,683 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 53 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:19:02,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1342629279] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:19:02,683 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:19:02,684 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-12 19:19:02,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208020056] [2021-06-12 19:19:02,684 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:19:02,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:19:02,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:19:02,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:19:02,684 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) [2021-06-12 19:19:03,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:19:03,200 INFO L93 Difference]: Finished difference Result 7022 states and 16378 transitions. [2021-06-12 19:19:03,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-12 19:19:03,201 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 [2021-06-12 19:19:03,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:19:03,207 INFO L225 Difference]: With dead ends: 7022 [2021-06-12 19:19:03,207 INFO L226 Difference]: Without dead ends: 6908 [2021-06-12 19:19:03,207 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 262.0ms TimeCoverageRelationStatistics Valid=165, Invalid=891, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 19:19:03,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6908 states. [2021-06-12 19:19:03,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6908 to 3954. [2021-06-12 19:19:03,252 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) [2021-06-12 19:19:03,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3954 states to 3954 states and 9841 transitions. [2021-06-12 19:19:03,257 INFO L78 Accepts]: Start accepts. Automaton has 3954 states and 9841 transitions. Word has length 41 [2021-06-12 19:19:03,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:19:03,257 INFO L482 AbstractCegarLoop]: Abstraction has 3954 states and 9841 transitions. [2021-06-12 19:19:03,257 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) [2021-06-12 19:19:03,257 INFO L276 IsEmpty]: Start isEmpty. Operand 3954 states and 9841 transitions. [2021-06-12 19:19:03,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-12 19:19:03,260 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:19:03,260 INFO L472 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:19:03,461 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable272,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:19:03,461 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:19:03,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:19:03,461 INFO L82 PathProgramCache]: Analyzing trace with hash 376472691, now seen corresponding path program 66 times [2021-06-12 19:19:03,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:19:03,461 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817259017] [2021-06-12 19:19:03,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:19:03,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:19:03,532 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 20 proven. 46 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:19:03,532 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:19:03,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817259017] [2021-06-12 19:19:03,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817259017] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:19:03,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001826081] [2021-06-12 19:19:03,532 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 [2021-06-12 19:19:03,560 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-12 19:19:03,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:19:03,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 19:19:03,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:19:03,621 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 20 proven. 46 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:19:03,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1001826081] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:19:03,621 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:19:03,621 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-12 19:19:03,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939963070] [2021-06-12 19:19:03,621 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:19:03,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:19:03,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:19:03,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:19:03,622 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) [2021-06-12 19:19:03,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:19:03,775 INFO L93 Difference]: Finished difference Result 4805 states and 11375 transitions. [2021-06-12 19:19:03,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:19:03,775 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 [2021-06-12 19:19:03,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:19:03,780 INFO L225 Difference]: With dead ends: 4805 [2021-06-12 19:19:03,780 INFO L226 Difference]: Without dead ends: 4772 [2021-06-12 19:19:03,780 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 88.8ms TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:19:03,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4772 states. [2021-06-12 19:19:03,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4772 to 3796. [2021-06-12 19:19:03,818 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) [2021-06-12 19:19:03,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3796 states to 3796 states and 9402 transitions. [2021-06-12 19:19:03,822 INFO L78 Accepts]: Start accepts. Automaton has 3796 states and 9402 transitions. Word has length 41 [2021-06-12 19:19:03,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:19:03,823 INFO L482 AbstractCegarLoop]: Abstraction has 3796 states and 9402 transitions. [2021-06-12 19:19:03,823 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) [2021-06-12 19:19:03,823 INFO L276 IsEmpty]: Start isEmpty. Operand 3796 states and 9402 transitions. [2021-06-12 19:19:03,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-12 19:19:03,825 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:19:03,825 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:19:04,025 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable273 [2021-06-12 19:19:04,026 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:19:04,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:19:04,026 INFO L82 PathProgramCache]: Analyzing trace with hash -69821496, now seen corresponding path program 67 times [2021-06-12 19:19:04,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:19:04,026 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866053324] [2021-06-12 19:19:04,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:19:04,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:19:04,107 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:19:04,107 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:19:04,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866053324] [2021-06-12 19:19:04,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866053324] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:19:04,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819250661] [2021-06-12 19:19:04,107 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 [2021-06-12 19:19:04,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:19:04,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:19:04,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:19:04,189 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:19:04,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [819250661] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:19:04,190 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:19:04,190 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-12 19:19:04,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114622322] [2021-06-12 19:19:04,190 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 19:19:04,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:19:04,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 19:19:04,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:19:04,190 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) [2021-06-12 19:19:04,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:19:04,587 INFO L93 Difference]: Finished difference Result 5143 states and 11987 transitions. [2021-06-12 19:19:04,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 19:19:04,588 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 [2021-06-12 19:19:04,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:19:04,592 INFO L225 Difference]: With dead ends: 5143 [2021-06-12 19:19:04,592 INFO L226 Difference]: Without dead ends: 4987 [2021-06-12 19:19:04,592 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 201.4ms TimeCoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:19:04,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4987 states. [2021-06-12 19:19:04,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4987 to 3332. [2021-06-12 19:19:04,621 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) [2021-06-12 19:19:04,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3332 states to 3332 states and 8120 transitions. [2021-06-12 19:19:04,625 INFO L78 Accepts]: Start accepts. Automaton has 3332 states and 8120 transitions. Word has length 41 [2021-06-12 19:19:04,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:19:04,625 INFO L482 AbstractCegarLoop]: Abstraction has 3332 states and 8120 transitions. [2021-06-12 19:19:04,625 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) [2021-06-12 19:19:04,625 INFO L276 IsEmpty]: Start isEmpty. Operand 3332 states and 8120 transitions. [2021-06-12 19:19:04,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-12 19:19:04,627 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:19:04,627 INFO L472 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:19:04,827 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 146 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable278 [2021-06-12 19:19:04,828 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:19:04,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:19:04,828 INFO L82 PathProgramCache]: Analyzing trace with hash -307883013, now seen corresponding path program 29 times [2021-06-12 19:19:04,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:19:04,828 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554460291] [2021-06-12 19:19:04,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:19:04,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:19:04,872 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 53 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:19:04,872 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:19:04,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554460291] [2021-06-12 19:19:04,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554460291] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:19:04,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297955921] [2021-06-12 19:19:04,872 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 [2021-06-12 19:19:04,901 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-06-12 19:19:04,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:19:04,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 19:19:04,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:19:04,965 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 54 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:19:04,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1297955921] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:19:04,965 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:19:04,965 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 10 [2021-06-12 19:19:04,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486320932] [2021-06-12 19:19:04,965 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:19:04,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:19:04,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:19:04,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:19:04,966 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) [2021-06-12 19:19:05,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:19:05,115 INFO L93 Difference]: Finished difference Result 4368 states and 10283 transitions. [2021-06-12 19:19:05,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:19:05,115 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 [2021-06-12 19:19:05,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:19:05,120 INFO L225 Difference]: With dead ends: 4368 [2021-06-12 19:19:05,120 INFO L226 Difference]: Without dead ends: 4354 [2021-06-12 19:19:05,120 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 57.2ms TimeCoverageRelationStatistics Valid=64, Invalid=92, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:19:05,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4354 states. [2021-06-12 19:19:05,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4354 to 3443. [2021-06-12 19:19:05,158 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) [2021-06-12 19:19:05,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3443 states to 3443 states and 8422 transitions. [2021-06-12 19:19:05,162 INFO L78 Accepts]: Start accepts. Automaton has 3443 states and 8422 transitions. Word has length 41 [2021-06-12 19:19:05,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:19:05,162 INFO L482 AbstractCegarLoop]: Abstraction has 3443 states and 8422 transitions. [2021-06-12 19:19:05,162 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) [2021-06-12 19:19:05,162 INFO L276 IsEmpty]: Start isEmpty. Operand 3443 states and 8422 transitions. [2021-06-12 19:19:05,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-12 19:19:05,164 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:19:05,164 INFO L472 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:19:05,365 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable279 [2021-06-12 19:19:05,365 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:19:05,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:19:05,365 INFO L82 PathProgramCache]: Analyzing trace with hash -929763423, now seen corresponding path program 30 times [2021-06-12 19:19:05,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:19:05,365 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653469046] [2021-06-12 19:19:05,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:19:05,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:19:05,409 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 53 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:19:05,410 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:19:05,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653469046] [2021-06-12 19:19:05,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653469046] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:19:05,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812208531] [2021-06-12 19:19:05,410 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 [2021-06-12 19:19:05,437 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-06-12 19:19:05,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:19:05,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:19:05,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:19:05,508 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 56 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:19:05,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1812208531] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:19:05,509 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:19:05,509 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 10 [2021-06-12 19:19:05,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026830513] [2021-06-12 19:19:05,509 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:19:05,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:19:05,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:19:05,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:19:05,509 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) [2021-06-12 19:19:05,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:19:05,742 INFO L93 Difference]: Finished difference Result 4338 states and 10163 transitions. [2021-06-12 19:19:05,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:19:05,742 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 [2021-06-12 19:19:05,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:19:05,745 INFO L225 Difference]: With dead ends: 4338 [2021-06-12 19:19:05,746 INFO L226 Difference]: Without dead ends: 4338 [2021-06-12 19:19:05,746 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 110.4ms TimeCoverageRelationStatistics Valid=113, Invalid=159, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:19:05,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4338 states. [2021-06-12 19:19:05,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4338 to 3179. [2021-06-12 19:19:05,772 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) [2021-06-12 19:19:05,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3179 states to 3179 states and 7751 transitions. [2021-06-12 19:19:05,776 INFO L78 Accepts]: Start accepts. Automaton has 3179 states and 7751 transitions. Word has length 41 [2021-06-12 19:19:05,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:19:05,776 INFO L482 AbstractCegarLoop]: Abstraction has 3179 states and 7751 transitions. [2021-06-12 19:19:05,776 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) [2021-06-12 19:19:05,776 INFO L276 IsEmpty]: Start isEmpty. Operand 3179 states and 7751 transitions. [2021-06-12 19:19:05,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-12 19:19:05,779 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:19:05,779 INFO L472 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:19:05,980 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable281,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:19:05,980 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:19:05,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:19:05,981 INFO L82 PathProgramCache]: Analyzing trace with hash 1823751373, now seen corresponding path program 68 times [2021-06-12 19:19:05,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:19:05,981 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843677097] [2021-06-12 19:19:05,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:19:05,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:19:06,050 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 28 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:19:06,051 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:19:06,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843677097] [2021-06-12 19:19:06,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843677097] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:19:06,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50217157] [2021-06-12 19:19:06,051 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 [2021-06-12 19:19:06,075 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:19:06,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:19:06,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 19:19:06,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:19:06,135 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 28 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:19:06,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [50217157] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:19:06,135 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:19:06,135 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-12 19:19:06,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444609015] [2021-06-12 19:19:06,135 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 19:19:06,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:19:06,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 19:19:06,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:19:06,135 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) [2021-06-12 19:19:06,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:19:06,303 INFO L93 Difference]: Finished difference Result 3775 states and 8829 transitions. [2021-06-12 19:19:06,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:19:06,304 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 [2021-06-12 19:19:06,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:19:06,307 INFO L225 Difference]: With dead ends: 3775 [2021-06-12 19:19:06,307 INFO L226 Difference]: Without dead ends: 3739 [2021-06-12 19:19:06,307 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 101.5ms TimeCoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:19:06,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3739 states. [2021-06-12 19:19:06,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3739 to 3188. [2021-06-12 19:19:06,333 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) [2021-06-12 19:19:06,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3188 states to 3188 states and 7757 transitions. [2021-06-12 19:19:06,336 INFO L78 Accepts]: Start accepts. Automaton has 3188 states and 7757 transitions. Word has length 41 [2021-06-12 19:19:06,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:19:06,337 INFO L482 AbstractCegarLoop]: Abstraction has 3188 states and 7757 transitions. [2021-06-12 19:19:06,337 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) [2021-06-12 19:19:06,337 INFO L276 IsEmpty]: Start isEmpty. Operand 3188 states and 7757 transitions. [2021-06-12 19:19:06,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-12 19:19:06,339 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:19:06,339 INFO L472 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:19:06,539 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable284,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:19:06,539 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:19:06,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:19:06,539 INFO L82 PathProgramCache]: Analyzing trace with hash 370314101, now seen corresponding path program 69 times [2021-06-12 19:19:06,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:19:06,540 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789823940] [2021-06-12 19:19:06,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:19:06,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:19:06,627 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 33 proven. 33 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:19:06,627 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:19:06,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789823940] [2021-06-12 19:19:06,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789823940] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:19:06,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951290001] [2021-06-12 19:19:06,628 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-12 19:19:06,655 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-12 19:19:06,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:19:06,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 19:19:06,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:19:06,717 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 33 proven. 33 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:19:06,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951290001] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:19:06,717 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:19:06,717 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-12 19:19:06,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602014780] [2021-06-12 19:19:06,718 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 19:19:06,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:19:06,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 19:19:06,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:19:06,718 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) [2021-06-12 19:19:06,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:19:06,941 INFO L93 Difference]: Finished difference Result 4138 states and 9762 transitions. [2021-06-12 19:19:06,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:19:06,941 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 [2021-06-12 19:19:06,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:19:06,945 INFO L225 Difference]: With dead ends: 4138 [2021-06-12 19:19:06,946 INFO L226 Difference]: Without dead ends: 4138 [2021-06-12 19:19:06,946 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 123.6ms TimeCoverageRelationStatistics Valid=126, Invalid=216, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:19:06,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4138 states. [2021-06-12 19:19:06,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4138 to 3170. [2021-06-12 19:19:06,978 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) [2021-06-12 19:19:06,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3170 states to 3170 states and 7779 transitions. [2021-06-12 19:19:06,982 INFO L78 Accepts]: Start accepts. Automaton has 3170 states and 7779 transitions. Word has length 41 [2021-06-12 19:19:06,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:19:06,982 INFO L482 AbstractCegarLoop]: Abstraction has 3170 states and 7779 transitions. [2021-06-12 19:19:06,982 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) [2021-06-12 19:19:06,982 INFO L276 IsEmpty]: Start isEmpty. Operand 3170 states and 7779 transitions. [2021-06-12 19:19:06,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-12 19:19:06,984 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:19:06,984 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:19:07,184 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable290 [2021-06-12 19:19:07,185 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:19:07,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:19:07,185 INFO L82 PathProgramCache]: Analyzing trace with hash 1062684898, now seen corresponding path program 31 times [2021-06-12 19:19:07,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:19:07,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247095779] [2021-06-12 19:19:07,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:19:07,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:19:07,259 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 5 proven. 59 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:19:07,259 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:19:07,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247095779] [2021-06-12 19:19:07,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247095779] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:19:07,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124016125] [2021-06-12 19:19:07,259 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 [2021-06-12 19:19:07,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:19:07,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:19:07,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:19:07,362 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 5 proven. 59 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:19:07,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2124016125] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:19:07,363 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:19:07,363 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-12 19:19:07,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665467104] [2021-06-12 19:19:07,363 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 19:19:07,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:19:07,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 19:19:07,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:19:07,363 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) [2021-06-12 19:19:07,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:19:07,729 INFO L93 Difference]: Finished difference Result 4257 states and 9988 transitions. [2021-06-12 19:19:07,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 19:19:07,729 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 [2021-06-12 19:19:07,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:19:07,733 INFO L225 Difference]: With dead ends: 4257 [2021-06-12 19:19:07,733 INFO L226 Difference]: Without dead ends: 4227 [2021-06-12 19:19:07,733 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 179.5ms TimeCoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:19:07,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4227 states. [2021-06-12 19:19:07,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4227 to 3157. [2021-06-12 19:19:07,761 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) [2021-06-12 19:19:07,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3157 states to 3157 states and 7762 transitions. [2021-06-12 19:19:07,764 INFO L78 Accepts]: Start accepts. Automaton has 3157 states and 7762 transitions. Word has length 41 [2021-06-12 19:19:07,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:19:07,764 INFO L482 AbstractCegarLoop]: Abstraction has 3157 states and 7762 transitions. [2021-06-12 19:19:07,764 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) [2021-06-12 19:19:07,764 INFO L276 IsEmpty]: Start isEmpty. Operand 3157 states and 7762 transitions. [2021-06-12 19:19:07,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-12 19:19:07,766 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:19:07,766 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:19:07,967 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable291,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:19:07,967 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:19:07,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:19:07,967 INFO L82 PathProgramCache]: Analyzing trace with hash 900632802, now seen corresponding path program 70 times [2021-06-12 19:19:07,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:19:07,967 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540127158] [2021-06-12 19:19:07,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:19:07,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:19:08,050 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 12 proven. 52 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:19:08,051 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:19:08,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540127158] [2021-06-12 19:19:08,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540127158] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:19:08,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430351187] [2021-06-12 19:19:08,051 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 [2021-06-12 19:19:08,076 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:19:08,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:19:08,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:19:08,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:19:08,236 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 9 proven. 55 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:19:08,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [430351187] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:19:08,236 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:19:08,236 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-06-12 19:19:08,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340846585] [2021-06-12 19:19:08,236 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:19:08,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:19:08,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:19:08,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:19:08,236 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) [2021-06-12 19:19:08,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:19:08,544 INFO L93 Difference]: Finished difference Result 3218 states and 7858 transitions. [2021-06-12 19:19:08,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:19:08,544 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 [2021-06-12 19:19:08,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:19:08,547 INFO L225 Difference]: With dead ends: 3218 [2021-06-12 19:19:08,547 INFO L226 Difference]: Without dead ends: 3174 [2021-06-12 19:19:08,547 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 133.8ms TimeCoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:19:08,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3174 states. [2021-06-12 19:19:08,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3174 to 3157. [2021-06-12 19:19:08,576 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) [2021-06-12 19:19:08,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3157 states to 3157 states and 7753 transitions. [2021-06-12 19:19:08,580 INFO L78 Accepts]: Start accepts. Automaton has 3157 states and 7753 transitions. Word has length 41 [2021-06-12 19:19:08,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:19:08,580 INFO L482 AbstractCegarLoop]: Abstraction has 3157 states and 7753 transitions. [2021-06-12 19:19:08,580 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) [2021-06-12 19:19:08,580 INFO L276 IsEmpty]: Start isEmpty. Operand 3157 states and 7753 transitions. [2021-06-12 19:19:08,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-12 19:19:08,582 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:19:08,582 INFO L472 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:19:08,783 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable292 [2021-06-12 19:19:08,783 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:19:08,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:19:08,783 INFO L82 PathProgramCache]: Analyzing trace with hash -514678441, now seen corresponding path program 71 times [2021-06-12 19:19:08,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:19:08,783 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871946219] [2021-06-12 19:19:08,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:19:08,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:19:08,843 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 31 proven. 35 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:19:08,843 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:19:08,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871946219] [2021-06-12 19:19:08,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871946219] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:19:08,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935619424] [2021-06-12 19:19:08,843 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 [2021-06-12 19:19:08,870 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-12 19:19:08,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:19:08,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 19:19:08,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:19:08,941 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 33 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:19:08,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1935619424] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:19:08,941 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:19:08,941 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 12 [2021-06-12 19:19:08,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489356887] [2021-06-12 19:19:08,942 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:19:08,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:19:08,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:19:08,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:19:08,942 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) [2021-06-12 19:19:09,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:19:09,169 INFO L93 Difference]: Finished difference Result 4264 states and 10096 transitions. [2021-06-12 19:19:09,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:19:09,169 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 [2021-06-12 19:19:09,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:19:09,173 INFO L225 Difference]: With dead ends: 4264 [2021-06-12 19:19:09,173 INFO L226 Difference]: Without dead ends: 4264 [2021-06-12 19:19:09,173 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 102.8ms TimeCoverageRelationStatistics Valid=116, Invalid=190, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:19:09,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4264 states. [2021-06-12 19:19:09,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4264 to 3336. [2021-06-12 19:19:09,205 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) [2021-06-12 19:19:09,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3336 states to 3336 states and 8301 transitions. [2021-06-12 19:19:09,210 INFO L78 Accepts]: Start accepts. Automaton has 3336 states and 8301 transitions. Word has length 41 [2021-06-12 19:19:09,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:19:09,210 INFO L482 AbstractCegarLoop]: Abstraction has 3336 states and 8301 transitions. [2021-06-12 19:19:09,210 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) [2021-06-12 19:19:09,210 INFO L276 IsEmpty]: Start isEmpty. Operand 3336 states and 8301 transitions. [2021-06-12 19:19:09,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-12 19:19:09,212 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:19:09,212 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:19:09,413 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable293,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:19:09,413 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:19:09,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:19:09,413 INFO L82 PathProgramCache]: Analyzing trace with hash 1038909258, now seen corresponding path program 32 times [2021-06-12 19:19:09,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:19:09,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452272001] [2021-06-12 19:19:09,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:19:09,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:19:09,478 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 5 proven. 59 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:19:09,478 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:19:09,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452272001] [2021-06-12 19:19:09,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452272001] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:19:09,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703952364] [2021-06-12 19:19:09,479 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 [2021-06-12 19:19:09,504 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:19:09,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:19:09,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:19:09,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:19:09,564 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 5 proven. 59 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:19:09,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [703952364] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:19:09,564 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:19:09,564 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-12 19:19:09,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293661198] [2021-06-12 19:19:09,564 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:19:09,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:19:09,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:19:09,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:19:09,565 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) [2021-06-12 19:19:09,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:19:09,855 INFO L93 Difference]: Finished difference Result 4243 states and 10191 transitions. [2021-06-12 19:19:09,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:19:09,855 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 [2021-06-12 19:19:09,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:19:09,860 INFO L225 Difference]: With dead ends: 4243 [2021-06-12 19:19:09,860 INFO L226 Difference]: Without dead ends: 4243 [2021-06-12 19:19:09,860 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 136.0ms TimeCoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:19:09,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4243 states. [2021-06-12 19:19:09,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4243 to 3327. [2021-06-12 19:19:09,895 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) [2021-06-12 19:19:09,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3327 states to 3327 states and 8299 transitions. [2021-06-12 19:19:09,900 INFO L78 Accepts]: Start accepts. Automaton has 3327 states and 8299 transitions. Word has length 41 [2021-06-12 19:19:09,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:19:09,900 INFO L482 AbstractCegarLoop]: Abstraction has 3327 states and 8299 transitions. [2021-06-12 19:19:09,900 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) [2021-06-12 19:19:09,901 INFO L276 IsEmpty]: Start isEmpty. Operand 3327 states and 8299 transitions. [2021-06-12 19:19:09,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-12 19:19:09,903 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:19:09,903 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:19:10,103 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable294,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:19:10,104 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:19:10,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:19:10,104 INFO L82 PathProgramCache]: Analyzing trace with hash 862018314, now seen corresponding path program 72 times [2021-06-12 19:19:10,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:19:10,104 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206187015] [2021-06-12 19:19:10,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:19:10,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:19:10,185 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 12 proven. 52 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:19:10,186 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:19:10,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206187015] [2021-06-12 19:19:10,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206187015] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:19:10,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360923598] [2021-06-12 19:19:10,186 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-12 19:19:10,213 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-12 19:19:10,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:19:10,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:19:10,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:19:10,346 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 9 proven. 55 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:19:10,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360923598] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:19:10,347 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:19:10,347 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-06-12 19:19:10,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624791782] [2021-06-12 19:19:10,347 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:19:10,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:19:10,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:19:10,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:19:10,347 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) [2021-06-12 19:19:10,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:19:10,641 INFO L93 Difference]: Finished difference Result 3397 states and 8404 transitions. [2021-06-12 19:19:10,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:19:10,642 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 [2021-06-12 19:19:10,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:19:10,645 INFO L225 Difference]: With dead ends: 3397 [2021-06-12 19:19:10,645 INFO L226 Difference]: Without dead ends: 3365 [2021-06-12 19:19:10,645 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 129.0ms TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:19:10,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3365 states. [2021-06-12 19:19:10,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3365 to 3327. [2021-06-12 19:19:10,672 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) [2021-06-12 19:19:10,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3327 states to 3327 states and 8293 transitions. [2021-06-12 19:19:10,676 INFO L78 Accepts]: Start accepts. Automaton has 3327 states and 8293 transitions. Word has length 41 [2021-06-12 19:19:10,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:19:10,676 INFO L482 AbstractCegarLoop]: Abstraction has 3327 states and 8293 transitions. [2021-06-12 19:19:10,676 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) [2021-06-12 19:19:10,676 INFO L276 IsEmpty]: Start isEmpty. Operand 3327 states and 8293 transitions. [2021-06-12 19:19:10,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-12 19:19:10,678 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:19:10,678 INFO L472 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:19:10,878 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable295,155 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:19:10,879 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:19:10,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:19:10,879 INFO L82 PathProgramCache]: Analyzing trace with hash 1554389111, now seen corresponding path program 33 times [2021-06-12 19:19:10,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:19:10,879 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383437418] [2021-06-12 19:19:10,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:19:10,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:19:10,942 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 28 proven. 38 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:19:10,942 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:19:10,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383437418] [2021-06-12 19:19:10,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383437418] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:19:10,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923553990] [2021-06-12 19:19:10,942 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 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 [2021-06-12 19:19:10,970 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-12 19:19:10,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:19:10,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 19:19:10,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:19:11,036 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 29 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:19:11,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1923553990] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:19:11,037 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:19:11,037 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 11 [2021-06-12 19:19:11,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543688935] [2021-06-12 19:19:11,037 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 19:19:11,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:19:11,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 19:19:11,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:19:11,037 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) [2021-06-12 19:19:11,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:19:11,204 INFO L93 Difference]: Finished difference Result 3937 states and 9522 transitions. [2021-06-12 19:19:11,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:19:11,205 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 [2021-06-12 19:19:11,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:19:11,208 INFO L225 Difference]: With dead ends: 3937 [2021-06-12 19:19:11,208 INFO L226 Difference]: Without dead ends: 3909 [2021-06-12 19:19:11,208 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 80.8ms TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:19:11,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3909 states. [2021-06-12 19:19:11,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3909 to 3225. [2021-06-12 19:19:11,237 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) [2021-06-12 19:19:11,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3225 states to 3225 states and 8085 transitions. [2021-06-12 19:19:11,241 INFO L78 Accepts]: Start accepts. Automaton has 3225 states and 8085 transitions. Word has length 41 [2021-06-12 19:19:11,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:19:11,241 INFO L482 AbstractCegarLoop]: Abstraction has 3225 states and 8085 transitions. [2021-06-12 19:19:11,241 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) [2021-06-12 19:19:11,241 INFO L276 IsEmpty]: Start isEmpty. Operand 3225 states and 8085 transitions. [2021-06-12 19:19:11,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-12 19:19:11,243 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:19:11,243 INFO L472 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:19:11,444 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable296,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:19:11,444 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:19:11,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:19:11,444 INFO L82 PathProgramCache]: Analyzing trace with hash -692902219, now seen corresponding path program 73 times [2021-06-12 19:19:11,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:19:11,444 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916064713] [2021-06-12 19:19:11,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:19:11,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:19:11,495 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 29 proven. 37 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:19:11,495 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:19:11,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916064713] [2021-06-12 19:19:11,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916064713] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:19:11,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397753011] [2021-06-12 19:19:11,496 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 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 [2021-06-12 19:19:11,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:19:11,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 19:19:11,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:19:11,581 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 29 proven. 37 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:19:11,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1397753011] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:19:11,581 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:19:11,581 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-12 19:19:11,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302570509] [2021-06-12 19:19:11,581 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 19:19:11,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:19:11,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 19:19:11,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:19:11,582 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) [2021-06-12 19:19:11,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:19:11,734 INFO L93 Difference]: Finished difference Result 4305 states and 10371 transitions. [2021-06-12 19:19:11,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:19:11,735 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 [2021-06-12 19:19:11,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:19:11,740 INFO L225 Difference]: With dead ends: 4305 [2021-06-12 19:19:11,740 INFO L226 Difference]: Without dead ends: 4305 [2021-06-12 19:19:11,740 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 65.4ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:19:11,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4305 states. [2021-06-12 19:19:11,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4305 to 3427. [2021-06-12 19:19:11,778 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) [2021-06-12 19:19:11,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3427 states to 3427 states and 8696 transitions. [2021-06-12 19:19:11,783 INFO L78 Accepts]: Start accepts. Automaton has 3427 states and 8696 transitions. Word has length 41 [2021-06-12 19:19:11,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:19:11,783 INFO L482 AbstractCegarLoop]: Abstraction has 3427 states and 8696 transitions. [2021-06-12 19:19:11,783 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) [2021-06-12 19:19:11,783 INFO L276 IsEmpty]: Start isEmpty. Operand 3427 states and 8696 transitions. [2021-06-12 19:19:11,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-12 19:19:11,786 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:19:11,786 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:19:11,986 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable301 [2021-06-12 19:19:11,986 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:19:11,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:19:11,987 INFO L82 PathProgramCache]: Analyzing trace with hash -1463737886, now seen corresponding path program 34 times [2021-06-12 19:19:11,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:19:11,987 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820733478] [2021-06-12 19:19:11,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:19:11,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:19:12,043 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 5 proven. 59 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:19:12,043 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:19:12,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820733478] [2021-06-12 19:19:12,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820733478] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:19:12,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927024050] [2021-06-12 19:19:12,043 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 [2021-06-12 19:19:12,071 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:19:12,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:19:12,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:19:12,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:19:12,129 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 5 proven. 59 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:19:12,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [927024050] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:19:12,130 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:19:12,130 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-12 19:19:12,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191009154] [2021-06-12 19:19:12,130 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 19:19:12,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:19:12,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 19:19:12,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:19:12,130 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) [2021-06-12 19:19:12,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:19:12,386 INFO L93 Difference]: Finished difference Result 4051 states and 9977 transitions. [2021-06-12 19:19:12,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:19:12,386 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 [2021-06-12 19:19:12,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:19:12,390 INFO L225 Difference]: With dead ends: 4051 [2021-06-12 19:19:12,390 INFO L226 Difference]: Without dead ends: 4047 [2021-06-12 19:19:12,390 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 104.7ms TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:19:12,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4047 states. [2021-06-12 19:19:12,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4047 to 3315. [2021-06-12 19:19:12,420 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) [2021-06-12 19:19:12,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3315 states to 3315 states and 8482 transitions. [2021-06-12 19:19:12,424 INFO L78 Accepts]: Start accepts. Automaton has 3315 states and 8482 transitions. Word has length 41 [2021-06-12 19:19:12,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:19:12,424 INFO L482 AbstractCegarLoop]: Abstraction has 3315 states and 8482 transitions. [2021-06-12 19:19:12,424 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) [2021-06-12 19:19:12,425 INFO L276 IsEmpty]: Start isEmpty. Operand 3315 states and 8482 transitions. [2021-06-12 19:19:12,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-12 19:19:12,426 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:19:12,426 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:19:12,627 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable302,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:19:12,627 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:19:12,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:19:12,627 INFO L82 PathProgramCache]: Analyzing trace with hash 1197933026, now seen corresponding path program 74 times [2021-06-12 19:19:12,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:19:12,627 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155023602] [2021-06-12 19:19:12,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:19:12,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:19:12,689 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 12 proven. 52 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:19:12,689 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:19:12,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155023602] [2021-06-12 19:19:12,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155023602] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:19:12,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364292605] [2021-06-12 19:19:12,690 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 [2021-06-12 19:19:12,715 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:19:12,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:19:12,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 19:19:12,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:19:12,770 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 [2021-06-12 19:19:12,771 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:19:12,772 INFO L628 ElimStorePlain]: treesize reduction 11, result has 8.3 percent of original size [2021-06-12 19:19:12,772 INFO L518 ElimStorePlain]: Eliminatee B vanished before elimination [2021-06-12 19:19:12,773 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:19:12,773 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:19, output treesize:1 [2021-06-12 19:19:12,778 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 12 proven. 52 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:19:12,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [364292605] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:19:12,778 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:19:12,778 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-06-12 19:19:12,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154519155] [2021-06-12 19:19:12,778 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 19:19:12,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:19:12,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 19:19:12,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-06-12 19:19:12,778 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) [2021-06-12 19:19:12,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:19:12,904 INFO L93 Difference]: Finished difference Result 3335 states and 8513 transitions. [2021-06-12 19:19:12,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:19:12,904 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 [2021-06-12 19:19:12,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:19:12,907 INFO L225 Difference]: With dead ends: 3335 [2021-06-12 19:19:12,907 INFO L226 Difference]: Without dead ends: 3315 [2021-06-12 19:19:12,908 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 58.0ms TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-06-12 19:19:12,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3315 states. [2021-06-12 19:19:12,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3315 to 3315. [2021-06-12 19:19:12,933 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) [2021-06-12 19:19:12,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3315 states to 3315 states and 8479 transitions. [2021-06-12 19:19:12,937 INFO L78 Accepts]: Start accepts. Automaton has 3315 states and 8479 transitions. Word has length 41 [2021-06-12 19:19:12,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:19:12,937 INFO L482 AbstractCegarLoop]: Abstraction has 3315 states and 8479 transitions. [2021-06-12 19:19:12,937 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) [2021-06-12 19:19:12,937 INFO L276 IsEmpty]: Start isEmpty. Operand 3315 states and 8479 transitions. [2021-06-12 19:19:12,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-12 19:19:12,939 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:19:12,939 INFO L472 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:19:13,140 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable303 [2021-06-12 19:19:13,140 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:19:13,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:19:13,140 INFO L82 PathProgramCache]: Analyzing trace with hash -1045836265, now seen corresponding path program 75 times [2021-06-12 19:19:13,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:19:13,140 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940030514] [2021-06-12 19:19:13,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:19:13,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:19:13,185 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 27 proven. 39 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:19:13,185 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:19:13,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940030514] [2021-06-12 19:19:13,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940030514] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:19:13,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544766316] [2021-06-12 19:19:13,186 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 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 [2021-06-12 19:19:13,213 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-12 19:19:13,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:19:13,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 19:19:13,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:19:13,274 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 27 proven. 39 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:19:13,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [544766316] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:19:13,274 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:19:13,274 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-06-12 19:19:13,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338594363] [2021-06-12 19:19:13,274 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 19:19:13,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:19:13,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 19:19:13,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-06-12 19:19:13,275 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) [2021-06-12 19:19:13,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:19:13,393 INFO L93 Difference]: Finished difference Result 4538 states and 11042 transitions. [2021-06-12 19:19:13,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:19:13,393 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 [2021-06-12 19:19:13,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:19:13,398 INFO L225 Difference]: With dead ends: 4538 [2021-06-12 19:19:13,398 INFO L226 Difference]: Without dead ends: 4538 [2021-06-12 19:19:13,398 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 46.1ms TimeCoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:19:13,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4538 states. [2021-06-12 19:19:13,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4538 to 3547. [2021-06-12 19:19:13,436 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) [2021-06-12 19:19:13,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3547 states to 3547 states and 9172 transitions. [2021-06-12 19:19:13,441 INFO L78 Accepts]: Start accepts. Automaton has 3547 states and 9172 transitions. Word has length 41 [2021-06-12 19:19:13,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:19:13,441 INFO L482 AbstractCegarLoop]: Abstraction has 3547 states and 9172 transitions. [2021-06-12 19:19:13,441 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) [2021-06-12 19:19:13,441 INFO L276 IsEmpty]: Start isEmpty. Operand 3547 states and 9172 transitions. [2021-06-12 19:19:13,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-12 19:19:13,443 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:19:13,443 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:19:13,652 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable304,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:19:13,653 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:19:13,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:19:13,653 INFO L82 PathProgramCache]: Analyzing trace with hash -1283897782, now seen corresponding path program 35 times [2021-06-12 19:19:13,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:19:13,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158773120] [2021-06-12 19:19:13,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:19:13,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:19:13,713 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 5 proven. 59 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:19:13,713 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:19:13,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158773120] [2021-06-12 19:19:13,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158773120] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:19:13,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308346802] [2021-06-12 19:19:13,713 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 [2021-06-12 19:19:13,741 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-12 19:19:13,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:19:13,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:19:13,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:19:13,810 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 5 proven. 59 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:19:13,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [308346802] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:19:13,810 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:19:13,810 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-12 19:19:13,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569093316] [2021-06-12 19:19:13,810 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 19:19:13,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:19:13,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 19:19:13,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-06-12 19:19:13,811 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) [2021-06-12 19:19:14,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:19:14,111 INFO L93 Difference]: Finished difference Result 4055 states and 10165 transitions. [2021-06-12 19:19:14,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:19:14,112 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 [2021-06-12 19:19:14,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:19:14,115 INFO L225 Difference]: With dead ends: 4055 [2021-06-12 19:19:14,115 INFO L226 Difference]: Without dead ends: 4047 [2021-06-12 19:19:14,116 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 103.6ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:19:14,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4047 states. [2021-06-12 19:19:14,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4047 to 3606. [2021-06-12 19:19:14,147 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) [2021-06-12 19:19:14,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3606 states to 3606 states and 9309 transitions. [2021-06-12 19:19:14,152 INFO L78 Accepts]: Start accepts. Automaton has 3606 states and 9309 transitions. Word has length 41 [2021-06-12 19:19:14,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:19:14,152 INFO L482 AbstractCegarLoop]: Abstraction has 3606 states and 9309 transitions. [2021-06-12 19:19:14,152 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) [2021-06-12 19:19:14,152 INFO L276 IsEmpty]: Start isEmpty. Operand 3606 states and 9309 transitions. [2021-06-12 19:19:14,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-12 19:19:14,154 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:19:14,154 INFO L472 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:19:14,355 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable305 [2021-06-12 19:19:14,355 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:19:14,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:19:14,355 INFO L82 PathProgramCache]: Analyzing trace with hash 1457372657, now seen corresponding path program 76 times [2021-06-12 19:19:14,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:19:14,355 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280904988] [2021-06-12 19:19:14,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:19:14,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:19:14,398 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 37 proven. 29 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:19:14,398 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:19:14,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280904988] [2021-06-12 19:19:14,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280904988] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:19:14,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460644315] [2021-06-12 19:19:14,398 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 [2021-06-12 19:19:14,424 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:19:14,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:19:14,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 19:19:14,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:19:14,480 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 37 proven. 29 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:19:14,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [460644315] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:19:14,480 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:19:14,480 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-06-12 19:19:14,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128740856] [2021-06-12 19:19:14,480 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 19:19:14,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:19:14,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 19:19:14,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-06-12 19:19:14,480 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) [2021-06-12 19:19:14,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:19:14,582 INFO L93 Difference]: Finished difference Result 4522 states and 10995 transitions. [2021-06-12 19:19:14,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:19:14,583 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 [2021-06-12 19:19:14,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:19:14,587 INFO L225 Difference]: With dead ends: 4522 [2021-06-12 19:19:14,587 INFO L226 Difference]: Without dead ends: 4519 [2021-06-12 19:19:14,587 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 40.3ms TimeCoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:19:14,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4519 states. [2021-06-12 19:19:14,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4519 to 3605. [2021-06-12 19:19:14,625 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) [2021-06-12 19:19:14,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3605 states to 3605 states and 9303 transitions. [2021-06-12 19:19:14,629 INFO L78 Accepts]: Start accepts. Automaton has 3605 states and 9303 transitions. Word has length 41 [2021-06-12 19:19:14,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:19:14,629 INFO L482 AbstractCegarLoop]: Abstraction has 3605 states and 9303 transitions. [2021-06-12 19:19:14,629 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) [2021-06-12 19:19:14,629 INFO L276 IsEmpty]: Start isEmpty. Operand 3605 states and 9303 transitions. [2021-06-12 19:19:14,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-12 19:19:14,631 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:19:14,631 INFO L472 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:19:14,832 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable306,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:19:14,832 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:19:14,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:19:14,832 INFO L82 PathProgramCache]: Analyzing trace with hash 1664435223, now seen corresponding path program 77 times [2021-06-12 19:19:14,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:19:14,832 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782191101] [2021-06-12 19:19:14,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:19:14,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:19:14,892 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 32 proven. 33 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:19:14,893 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:19:14,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782191101] [2021-06-12 19:19:14,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782191101] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:19:14,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513161312] [2021-06-12 19:19:14,893 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 [2021-06-12 19:19:14,936 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-12 19:19:14,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:19:14,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 19:19:14,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:19:15,007 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 35 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:19:15,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1513161312] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:19:15,007 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:19:15,007 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 10 [2021-06-12 19:19:15,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918397644] [2021-06-12 19:19:15,007 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:19:15,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:19:15,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:19:15,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:19:15,008 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) [2021-06-12 19:19:15,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:19:15,132 INFO L93 Difference]: Finished difference Result 4564 states and 11216 transitions. [2021-06-12 19:19:15,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:19:15,132 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 [2021-06-12 19:19:15,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:19:15,137 INFO L225 Difference]: With dead ends: 4564 [2021-06-12 19:19:15,138 INFO L226 Difference]: Without dead ends: 4552 [2021-06-12 19:19:15,138 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 69.8ms TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:19:15,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4552 states. [2021-06-12 19:19:15,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4552 to 3605. [2021-06-12 19:19:15,178 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) [2021-06-12 19:19:15,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3605 states to 3605 states and 9300 transitions. [2021-06-12 19:19:15,183 INFO L78 Accepts]: Start accepts. Automaton has 3605 states and 9300 transitions. Word has length 41 [2021-06-12 19:19:15,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:19:15,184 INFO L482 AbstractCegarLoop]: Abstraction has 3605 states and 9300 transitions. [2021-06-12 19:19:15,184 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) [2021-06-12 19:19:15,184 INFO L276 IsEmpty]: Start isEmpty. Operand 3605 states and 9300 transitions. [2021-06-12 19:19:15,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-12 19:19:15,186 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:19:15,186 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:19:15,386 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable308,163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:19:15,387 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:19:15,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:19:15,387 INFO L82 PathProgramCache]: Analyzing trace with hash 216435210, now seen corresponding path program 78 times [2021-06-12 19:19:15,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:19:15,387 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976222956] [2021-06-12 19:19:15,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:19:15,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:19:15,443 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 13 proven. 51 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:19:15,444 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:19:15,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976222956] [2021-06-12 19:19:15,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976222956] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:19:15,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794233835] [2021-06-12 19:19:15,444 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 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 [2021-06-12 19:19:15,470 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-12 19:19:15,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:19:15,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:19:15,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:19:15,541 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 9 proven. 55 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:19:15,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [794233835] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:19:15,541 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:19:15,541 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-06-12 19:19:15,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967340233] [2021-06-12 19:19:15,541 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 19:19:15,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:19:15,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 19:19:15,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-06-12 19:19:15,541 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) [2021-06-12 19:19:15,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:19:15,825 INFO L93 Difference]: Finished difference Result 3907 states and 9798 transitions. [2021-06-12 19:19:15,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:19:15,825 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 [2021-06-12 19:19:15,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:19:15,829 INFO L225 Difference]: With dead ends: 3907 [2021-06-12 19:19:15,829 INFO L226 Difference]: Without dead ends: 3810 [2021-06-12 19:19:15,829 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 81.1ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:19:15,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3810 states. [2021-06-12 19:19:15,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3810 to 3511. [2021-06-12 19:19:15,859 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) [2021-06-12 19:19:15,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3511 states to 3511 states and 9079 transitions. [2021-06-12 19:19:15,863 INFO L78 Accepts]: Start accepts. Automaton has 3511 states and 9079 transitions. Word has length 41 [2021-06-12 19:19:15,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:19:15,863 INFO L482 AbstractCegarLoop]: Abstraction has 3511 states and 9079 transitions. [2021-06-12 19:19:15,863 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) [2021-06-12 19:19:15,863 INFO L276 IsEmpty]: Start isEmpty. Operand 3511 states and 9079 transitions. [2021-06-12 19:19:15,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-12 19:19:15,865 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:19:15,865 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:19:16,066 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable311 [2021-06-12 19:19:16,066 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:19:16,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:19:16,066 INFO L82 PathProgramCache]: Analyzing trace with hash -397100970, now seen corresponding path program 79 times [2021-06-12 19:19:16,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:19:16,066 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894256240] [2021-06-12 19:19:16,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:19:16,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:19:16,134 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 11 proven. 52 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:19:16,134 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:19:16,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894256240] [2021-06-12 19:19:16,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894256240] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:19:16,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800917269] [2021-06-12 19:19:16,134 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 [2021-06-12 19:19:16,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:19:16,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:19:16,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:19:16,227 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 53 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:19:16,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800917269] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:19:16,228 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:19:16,228 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-06-12 19:19:16,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899311221] [2021-06-12 19:19:16,228 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 19:19:16,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:19:16,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 19:19:16,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-06-12 19:19:16,228 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) [2021-06-12 19:19:16,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:19:16,469 INFO L93 Difference]: Finished difference Result 3950 states and 9921 transitions. [2021-06-12 19:19:16,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:19:16,469 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 [2021-06-12 19:19:16,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:19:16,473 INFO L225 Difference]: With dead ends: 3950 [2021-06-12 19:19:16,473 INFO L226 Difference]: Without dead ends: 3938 [2021-06-12 19:19:16,476 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 87.8ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:19:16,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3938 states. [2021-06-12 19:19:16,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3938 to 3513. [2021-06-12 19:19:16,515 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) [2021-06-12 19:19:16,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3513 states to 3513 states and 9084 transitions. [2021-06-12 19:19:16,520 INFO L78 Accepts]: Start accepts. Automaton has 3513 states and 9084 transitions. Word has length 41 [2021-06-12 19:19:16,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:19:16,520 INFO L482 AbstractCegarLoop]: Abstraction has 3513 states and 9084 transitions. [2021-06-12 19:19:16,520 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) [2021-06-12 19:19:16,520 INFO L276 IsEmpty]: Start isEmpty. Operand 3513 states and 9084 transitions. [2021-06-12 19:19:16,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-12 19:19:16,523 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:19:16,523 INFO L472 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:19:16,723 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable312 [2021-06-12 19:19:16,723 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:19:16,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:19:16,723 INFO L82 PathProgramCache]: Analyzing trace with hash -554400457, now seen corresponding path program 36 times [2021-06-12 19:19:16,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:19:16,724 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121390213] [2021-06-12 19:19:16,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:19:16,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:19:16,769 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 36 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:19:16,770 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:19:16,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121390213] [2021-06-12 19:19:16,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121390213] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:19:16,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857710363] [2021-06-12 19:19:16,770 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 [2021-06-12 19:19:16,796 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-12 19:19:16,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:19:16,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 19:19:16,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:19:16,877 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 37 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:19:16,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1857710363] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:19:16,878 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:19:16,878 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12] total 13 [2021-06-12 19:19:16,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46974922] [2021-06-12 19:19:16,878 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:19:16,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:19:16,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:19:16,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:19:16,878 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) [2021-06-12 19:19:17,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:19:17,048 INFO L93 Difference]: Finished difference Result 4278 states and 10675 transitions. [2021-06-12 19:19:17,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:19:17,049 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 [2021-06-12 19:19:17,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:19:17,053 INFO L225 Difference]: With dead ends: 4278 [2021-06-12 19:19:17,053 INFO L226 Difference]: Without dead ends: 4268 [2021-06-12 19:19:17,054 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 85.8ms TimeCoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:19:17,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4268 states. [2021-06-12 19:19:17,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4268 to 3755. [2021-06-12 19:19:17,093 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) [2021-06-12 19:19:17,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3755 states to 3755 states and 9715 transitions. [2021-06-12 19:19:17,098 INFO L78 Accepts]: Start accepts. Automaton has 3755 states and 9715 transitions. Word has length 41 [2021-06-12 19:19:17,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:19:17,098 INFO L482 AbstractCegarLoop]: Abstraction has 3755 states and 9715 transitions. [2021-06-12 19:19:17,098 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) [2021-06-12 19:19:17,098 INFO L276 IsEmpty]: Start isEmpty. Operand 3755 states and 9715 transitions. [2021-06-12 19:19:17,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-12 19:19:17,101 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:19:17,101 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:19:17,301 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable313,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:19:17,301 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:19:17,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:19:17,302 INFO L82 PathProgramCache]: Analyzing trace with hash 1744816364, now seen corresponding path program 80 times [2021-06-12 19:19:17,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:19:17,302 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908162739] [2021-06-12 19:19:17,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:19:17,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:19:17,361 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 11 proven. 53 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:19:17,361 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:19:17,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908162739] [2021-06-12 19:19:17,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908162739] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:19:17,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419497882] [2021-06-12 19:19:17,361 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 [2021-06-12 19:19:17,387 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:19:17,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:19:17,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 19:19:17,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:19:17,457 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:19:17,457 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 [2021-06-12 19:19:17,460 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:19:17,461 INFO L628 ElimStorePlain]: treesize reduction 20, result has 4.8 percent of original size [2021-06-12 19:19:17,462 INFO L518 ElimStorePlain]: Eliminatee B vanished before elimination [2021-06-12 19:19:17,462 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:19:17,462 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:1 [2021-06-12 19:19:17,469 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 14 proven. 50 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:19:17,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [419497882] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:19:17,469 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:19:17,469 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-12 19:19:17,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479412229] [2021-06-12 19:19:17,469 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 19:19:17,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:19:17,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 19:19:17,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:19:17,469 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) [2021-06-12 19:19:17,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:19:17,898 INFO L93 Difference]: Finished difference Result 5015 states and 12296 transitions. [2021-06-12 19:19:17,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 19:19:17,898 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 [2021-06-12 19:19:17,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:19:17,903 INFO L225 Difference]: With dead ends: 5015 [2021-06-12 19:19:17,903 INFO L226 Difference]: Without dead ends: 4961 [2021-06-12 19:19:17,904 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 154.5ms TimeCoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:19:17,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4961 states. [2021-06-12 19:19:17,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4961 to 3838. [2021-06-12 19:19:17,945 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) [2021-06-12 19:19:17,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3838 states to 3838 states and 9931 transitions. [2021-06-12 19:19:17,950 INFO L78 Accepts]: Start accepts. Automaton has 3838 states and 9931 transitions. Word has length 41 [2021-06-12 19:19:17,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:19:17,950 INFO L482 AbstractCegarLoop]: Abstraction has 3838 states and 9931 transitions. [2021-06-12 19:19:17,950 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) [2021-06-12 19:19:17,950 INFO L276 IsEmpty]: Start isEmpty. Operand 3838 states and 9931 transitions. [2021-06-12 19:19:17,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-12 19:19:17,953 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:19:17,953 INFO L472 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:19:18,153 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable316 [2021-06-12 19:19:18,153 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:19:18,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:19:18,153 INFO L82 PathProgramCache]: Analyzing trace with hash -1017591823, now seen corresponding path program 81 times [2021-06-12 19:19:18,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:19:18,154 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264474924] [2021-06-12 19:19:18,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:19:18,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:19:18,207 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 24 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:19:18,207 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:19:18,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264474924] [2021-06-12 19:19:18,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264474924] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:19:18,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213454858] [2021-06-12 19:19:18,207 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-12 19:19:18,233 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-12 19:19:18,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:19:18,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 19:19:18,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:19:18,310 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 24 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:19:18,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1213454858] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:19:18,310 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:19:18,310 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-12 19:19:18,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922166410] [2021-06-12 19:19:18,311 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 19:19:18,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:19:18,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 19:19:18,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:19:18,311 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) [2021-06-12 19:19:18,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:19:18,435 INFO L93 Difference]: Finished difference Result 4722 states and 11676 transitions. [2021-06-12 19:19:18,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:19:18,435 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 [2021-06-12 19:19:18,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:19:18,439 INFO L225 Difference]: With dead ends: 4722 [2021-06-12 19:19:18,439 INFO L226 Difference]: Without dead ends: 4704 [2021-06-12 19:19:18,440 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 58.5ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:19:18,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4704 states. [2021-06-12 19:19:18,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4704 to 3928. [2021-06-12 19:19:18,481 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) [2021-06-12 19:19:18,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3928 states to 3928 states and 10211 transitions. [2021-06-12 19:19:18,486 INFO L78 Accepts]: Start accepts. Automaton has 3928 states and 10211 transitions. Word has length 41 [2021-06-12 19:19:18,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:19:18,487 INFO L482 AbstractCegarLoop]: Abstraction has 3928 states and 10211 transitions. [2021-06-12 19:19:18,487 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) [2021-06-12 19:19:18,487 INFO L276 IsEmpty]: Start isEmpty. Operand 3928 states and 10211 transitions. [2021-06-12 19:19:18,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-12 19:19:18,489 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:19:18,489 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:19:18,689 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable317,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:19:18,689 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:19:18,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:19:18,690 INFO L82 PathProgramCache]: Analyzing trace with hash 1899652898, now seen corresponding path program 82 times [2021-06-12 19:19:18,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:19:18,690 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412191275] [2021-06-12 19:19:18,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:19:18,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:19:18,766 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 11 proven. 53 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:19:18,766 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:19:18,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412191275] [2021-06-12 19:19:18,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412191275] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:19:18,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764542310] [2021-06-12 19:19:18,767 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 [2021-06-12 19:19:18,795 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:19:18,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:19:18,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 24 conjunts are in the unsatisfiable core [2021-06-12 19:19:18,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:19:18,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:19:18,887 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 [2021-06-12 19:19:18,888 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:19:18,890 INFO L628 ElimStorePlain]: treesize reduction 20, result has 4.8 percent of original size [2021-06-12 19:19:18,891 INFO L518 ElimStorePlain]: Eliminatee B vanished before elimination [2021-06-12 19:19:18,891 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:19:18,891 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:1 [2021-06-12 19:19:18,898 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 14 proven. 50 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:19:18,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1764542310] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:19:18,899 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:19:18,899 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-12 19:19:18,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317814562] [2021-06-12 19:19:18,899 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:19:18,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:19:18,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:19:18,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:19:18,899 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) [2021-06-12 19:19:19,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:19:19,497 INFO L93 Difference]: Finished difference Result 7135 states and 16888 transitions. [2021-06-12 19:19:19,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-12 19:19:19,498 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 [2021-06-12 19:19:19,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:19:19,504 INFO L225 Difference]: With dead ends: 7135 [2021-06-12 19:19:19,504 INFO L226 Difference]: Without dead ends: 6955 [2021-06-12 19:19:19,505 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 322.2ms TimeCoverageRelationStatistics Valid=213, Invalid=1269, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 19:19:19,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6955 states. [2021-06-12 19:19:19,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6955 to 4145. [2021-06-12 19:19:19,555 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) [2021-06-12 19:19:19,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4145 states to 4145 states and 10742 transitions. [2021-06-12 19:19:19,560 INFO L78 Accepts]: Start accepts. Automaton has 4145 states and 10742 transitions. Word has length 41 [2021-06-12 19:19:19,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:19:19,560 INFO L482 AbstractCegarLoop]: Abstraction has 4145 states and 10742 transitions. [2021-06-12 19:19:19,560 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) [2021-06-12 19:19:19,560 INFO L276 IsEmpty]: Start isEmpty. Operand 4145 states and 10742 transitions. [2021-06-12 19:19:19,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-12 19:19:19,562 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:19:19,562 INFO L472 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:19:19,762 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable321 [2021-06-12 19:19:19,763 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:19:19,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:19:19,763 INFO L82 PathProgramCache]: Analyzing trace with hash -2008711721, now seen corresponding path program 83 times [2021-06-12 19:19:19,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:19:19,763 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030035424] [2021-06-12 19:19:19,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:19:19,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:19:19,827 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 22 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:19:19,827 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:19:19,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030035424] [2021-06-12 19:19:19,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030035424] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:19:19,827 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294401178] [2021-06-12 19:19:19,827 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 [2021-06-12 19:19:19,853 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-12 19:19:19,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:19:19,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 19:19:19,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:19:19,924 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 22 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:19:19,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294401178] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:19:19,924 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:19:19,924 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 12 [2021-06-12 19:19:19,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812818385] [2021-06-12 19:19:19,924 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:19:19,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:19:19,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:19:19,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:19:19,924 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) [2021-06-12 19:19:20,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:19:20,088 INFO L93 Difference]: Finished difference Result 5126 states and 12564 transitions. [2021-06-12 19:19:20,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:19:20,089 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 [2021-06-12 19:19:20,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:19:20,094 INFO L225 Difference]: With dead ends: 5126 [2021-06-12 19:19:20,094 INFO L226 Difference]: Without dead ends: 5099 [2021-06-12 19:19:20,094 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 90.8ms TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:19:20,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5099 states. [2021-06-12 19:19:20,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5099 to 4145. [2021-06-12 19:19:20,144 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) [2021-06-12 19:19:20,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4145 states to 4145 states and 10739 transitions. [2021-06-12 19:19:20,149 INFO L78 Accepts]: Start accepts. Automaton has 4145 states and 10739 transitions. Word has length 41 [2021-06-12 19:19:20,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:19:20,149 INFO L482 AbstractCegarLoop]: Abstraction has 4145 states and 10739 transitions. [2021-06-12 19:19:20,149 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) [2021-06-12 19:19:20,149 INFO L276 IsEmpty]: Start isEmpty. Operand 4145 states and 10739 transitions. [2021-06-12 19:19:20,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-12 19:19:20,152 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:19:20,152 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:19:20,352 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 170 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable322 [2021-06-12 19:19:20,352 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:19:20,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:19:20,353 INFO L82 PathProgramCache]: Analyzing trace with hash 1839961388, now seen corresponding path program 84 times [2021-06-12 19:19:20,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:19:20,353 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390878976] [2021-06-12 19:19:20,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:19:20,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:19:20,431 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 11 proven. 53 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:19:20,432 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:19:20,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390878976] [2021-06-12 19:19:20,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390878976] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:19:20,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778442143] [2021-06-12 19:19:20,432 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 [2021-06-12 19:19:20,459 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-12 19:19:20,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:19:20,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:19:20,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:19:20,516 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 54 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:19:20,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [778442143] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:19:20,516 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:19:20,516 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-12 19:19:20,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181212608] [2021-06-12 19:19:20,516 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 19:19:20,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:19:20,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 19:19:20,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:19:20,517 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) [2021-06-12 19:19:21,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:19:21,410 INFO L93 Difference]: Finished difference Result 8258 states and 19418 transitions. [2021-06-12 19:19:21,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-12 19:19:21,410 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 [2021-06-12 19:19:21,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:19:21,417 INFO L225 Difference]: With dead ends: 8258 [2021-06-12 19:19:21,418 INFO L226 Difference]: Without dead ends: 7982 [2021-06-12 19:19:21,418 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1320 ImplicationChecksByTransitivity, 599.6ms TimeCoverageRelationStatistics Valid=483, Invalid=3423, Unknown=0, NotChecked=0, Total=3906 [2021-06-12 19:19:21,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7982 states. [2021-06-12 19:19:21,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7982 to 4501. [2021-06-12 19:19:21,470 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) [2021-06-12 19:19:21,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4501 states to 4501 states and 11611 transitions. [2021-06-12 19:19:21,476 INFO L78 Accepts]: Start accepts. Automaton has 4501 states and 11611 transitions. Word has length 41 [2021-06-12 19:19:21,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:19:21,476 INFO L482 AbstractCegarLoop]: Abstraction has 4501 states and 11611 transitions. [2021-06-12 19:19:21,476 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) [2021-06-12 19:19:21,476 INFO L276 IsEmpty]: Start isEmpty. Operand 4501 states and 11611 transitions. [2021-06-12 19:19:21,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-12 19:19:21,479 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:19:21,479 INFO L472 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:19:21,679 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable327 [2021-06-12 19:19:21,679 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:19:21,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:19:21,679 INFO L82 PathProgramCache]: Analyzing trace with hash -561433039, now seen corresponding path program 85 times [2021-06-12 19:19:21,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:19:21,679 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517671092] [2021-06-12 19:19:21,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:19:21,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:19:21,750 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 26 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:19:21,750 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:19:21,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517671092] [2021-06-12 19:19:21,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517671092] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:19:21,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997079224] [2021-06-12 19:19:21,750 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-12 19:19:21,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:19:21,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 19:19:21,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:19:21,876 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 26 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:19:21,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1997079224] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:19:21,876 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:19:21,876 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-12 19:19:21,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578244561] [2021-06-12 19:19:21,876 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 19:19:21,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:19:21,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 19:19:21,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:19:21,876 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) [2021-06-12 19:19:22,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:19:22,040 INFO L93 Difference]: Finished difference Result 5578 states and 13597 transitions. [2021-06-12 19:19:22,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:19:22,040 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 [2021-06-12 19:19:22,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:19:22,045 INFO L225 Difference]: With dead ends: 5578 [2021-06-12 19:19:22,045 INFO L226 Difference]: Without dead ends: 5542 [2021-06-12 19:19:22,045 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 94.3ms TimeCoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:19:22,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5542 states. [2021-06-12 19:19:22,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5542 to 4501. [2021-06-12 19:19:22,095 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) [2021-06-12 19:19:22,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4501 states to 4501 states and 11608 transitions. [2021-06-12 19:19:22,101 INFO L78 Accepts]: Start accepts. Automaton has 4501 states and 11608 transitions. Word has length 41 [2021-06-12 19:19:22,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:19:22,101 INFO L482 AbstractCegarLoop]: Abstraction has 4501 states and 11608 transitions. [2021-06-12 19:19:22,101 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) [2021-06-12 19:19:22,101 INFO L276 IsEmpty]: Start isEmpty. Operand 4501 states and 11608 transitions. [2021-06-12 19:19:22,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-12 19:19:22,104 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:19:22,104 INFO L472 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:19:22,304 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable328,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:19:22,305 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:19:22,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:19:22,305 INFO L82 PathProgramCache]: Analyzing trace with hash 1686647522, now seen corresponding path program 86 times [2021-06-12 19:19:22,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:19:22,305 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459706053] [2021-06-12 19:19:22,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:19:22,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:19:22,388 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:19:22,388 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:19:22,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459706053] [2021-06-12 19:19:22,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459706053] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:19:22,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290647408] [2021-06-12 19:19:22,388 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 [2021-06-12 19:19:22,413 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:19:22,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:19:22,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:19:22,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:19:22,474 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:19:22,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1290647408] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:19:22,474 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:19:22,475 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-12 19:19:22,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737069516] [2021-06-12 19:19:22,475 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:19:22,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:19:22,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:19:22,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:19:22,475 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) [2021-06-12 19:19:22,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:19:22,835 INFO L93 Difference]: Finished difference Result 5731 states and 13840 transitions. [2021-06-12 19:19:22,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:19:22,836 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 [2021-06-12 19:19:22,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:19:22,840 INFO L225 Difference]: With dead ends: 5731 [2021-06-12 19:19:22,841 INFO L226 Difference]: Without dead ends: 5353 [2021-06-12 19:19:22,841 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 215.4ms TimeCoverageRelationStatistics Valid=126, Invalid=524, Unknown=0, NotChecked=0, Total=650 [2021-06-12 19:19:22,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5353 states. [2021-06-12 19:19:22,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5353 to 3673. [2021-06-12 19:19:22,882 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) [2021-06-12 19:19:22,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3673 states to 3673 states and 9611 transitions. [2021-06-12 19:19:22,886 INFO L78 Accepts]: Start accepts. Automaton has 3673 states and 9611 transitions. Word has length 41 [2021-06-12 19:19:22,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:19:22,886 INFO L482 AbstractCegarLoop]: Abstraction has 3673 states and 9611 transitions. [2021-06-12 19:19:22,887 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) [2021-06-12 19:19:22,887 INFO L276 IsEmpty]: Start isEmpty. Operand 3673 states and 9611 transitions. [2021-06-12 19:19:22,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-12 19:19:22,889 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:19:22,889 INFO L472 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:19:23,089 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable334 [2021-06-12 19:19:23,089 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:19:23,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:19:23,090 INFO L82 PathProgramCache]: Analyzing trace with hash 826705595, now seen corresponding path program 37 times [2021-06-12 19:19:23,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:19:23,090 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150389029] [2021-06-12 19:19:23,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:19:23,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:19:23,142 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 48 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:19:23,142 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:19:23,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150389029] [2021-06-12 19:19:23,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150389029] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:19:23,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663284016] [2021-06-12 19:19:23,142 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 [2021-06-12 19:19:23,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:19:23,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:19:23,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:19:23,237 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 49 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:19:23,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [663284016] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:19:23,237 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:19:23,237 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 10 [2021-06-12 19:19:23,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042014400] [2021-06-12 19:19:23,238 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:19:23,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:19:23,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:19:23,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:19:23,238 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) [2021-06-12 19:19:23,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:19:23,503 INFO L93 Difference]: Finished difference Result 4473 states and 11190 transitions. [2021-06-12 19:19:23,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:19:23,503 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 [2021-06-12 19:19:23,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:19:23,507 INFO L225 Difference]: With dead ends: 4473 [2021-06-12 19:19:23,507 INFO L226 Difference]: Without dead ends: 4473 [2021-06-12 19:19:23,508 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 140.8ms TimeCoverageRelationStatistics Valid=138, Invalid=204, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:19:23,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4473 states. [2021-06-12 19:19:23,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4473 to 3628. [2021-06-12 19:19:23,540 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) [2021-06-12 19:19:23,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3628 states to 3628 states and 9526 transitions. [2021-06-12 19:19:23,544 INFO L78 Accepts]: Start accepts. Automaton has 3628 states and 9526 transitions. Word has length 41 [2021-06-12 19:19:23,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:19:23,544 INFO L482 AbstractCegarLoop]: Abstraction has 3628 states and 9526 transitions. [2021-06-12 19:19:23,544 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) [2021-06-12 19:19:23,545 INFO L276 IsEmpty]: Start isEmpty. Operand 3628 states and 9526 transitions. [2021-06-12 19:19:23,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-12 19:19:23,546 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:19:23,546 INFO L472 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:19:23,747 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable335,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:19:23,747 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:19:23,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:19:23,747 INFO L82 PathProgramCache]: Analyzing trace with hash -1858902121, now seen corresponding path program 87 times [2021-06-12 19:19:23,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:19:23,747 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231583318] [2021-06-12 19:19:23,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:19:23,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:19:23,828 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 37 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:19:23,828 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:19:23,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231583318] [2021-06-12 19:19:23,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231583318] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:19:23,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756266603] [2021-06-12 19:19:23,829 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 [2021-06-12 19:19:23,855 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-12 19:19:23,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:19:23,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-12 19:19:23,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:19:23,916 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 37 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:19:23,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756266603] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:19:23,917 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:19:23,917 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-06-12 19:19:23,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971952401] [2021-06-12 19:19:23,917 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:19:23,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:19:23,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:19:23,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:19:23,917 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) [2021-06-12 19:19:24,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:19:24,091 INFO L93 Difference]: Finished difference Result 4326 states and 10808 transitions. [2021-06-12 19:19:24,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:19:24,091 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 [2021-06-12 19:19:24,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:19:24,095 INFO L225 Difference]: With dead ends: 4326 [2021-06-12 19:19:24,095 INFO L226 Difference]: Without dead ends: 4279 [2021-06-12 19:19:24,096 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 116.6ms TimeCoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:19:24,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4279 states. [2021-06-12 19:19:24,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4279 to 3637. [2021-06-12 19:19:24,134 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) [2021-06-12 19:19:24,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3637 states to 3637 states and 9540 transitions. [2021-06-12 19:19:24,139 INFO L78 Accepts]: Start accepts. Automaton has 3637 states and 9540 transitions. Word has length 41 [2021-06-12 19:19:24,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:19:24,139 INFO L482 AbstractCegarLoop]: Abstraction has 3637 states and 9540 transitions. [2021-06-12 19:19:24,139 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) [2021-06-12 19:19:24,139 INFO L276 IsEmpty]: Start isEmpty. Operand 3637 states and 9540 transitions. [2021-06-12 19:19:24,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-12 19:19:24,141 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:19:24,141 INFO L472 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:19:24,342 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable338 [2021-06-12 19:19:24,342 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:19:24,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:19:24,342 INFO L82 PathProgramCache]: Analyzing trace with hash 714915480, now seen corresponding path program 88 times [2021-06-12 19:19:24,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:19:24,342 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658991734] [2021-06-12 19:19:24,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:19:24,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:19:24,404 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:19:24,404 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:19:24,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658991734] [2021-06-12 19:19:24,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658991734] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:19:24,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077376151] [2021-06-12 19:19:24,405 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 [2021-06-12 19:19:24,430 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:19:24,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:19:24,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:19:24,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:19:24,643 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 35 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:19:24,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1077376151] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:19:24,643 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:19:24,643 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 13] total 19 [2021-06-12 19:19:24,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290987334] [2021-06-12 19:19:24,643 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 19:19:24,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:19:24,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 19:19:24,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:19:24,644 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) [2021-06-12 19:19:25,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:19:25,603 INFO L93 Difference]: Finished difference Result 5488 states and 13282 transitions. [2021-06-12 19:19:25,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-12 19:19:25,603 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 [2021-06-12 19:19:25,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:19:25,609 INFO L225 Difference]: With dead ends: 5488 [2021-06-12 19:19:25,609 INFO L226 Difference]: Without dead ends: 5450 [2021-06-12 19:19:25,609 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 546.6ms TimeCoverageRelationStatistics Valid=473, Invalid=1783, Unknown=0, NotChecked=0, Total=2256 [2021-06-12 19:19:25,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5450 states. [2021-06-12 19:19:25,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5450 to 4188. [2021-06-12 19:19:25,650 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) [2021-06-12 19:19:25,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4188 states to 4188 states and 10765 transitions. [2021-06-12 19:19:25,655 INFO L78 Accepts]: Start accepts. Automaton has 4188 states and 10765 transitions. Word has length 44 [2021-06-12 19:19:25,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:19:25,655 INFO L482 AbstractCegarLoop]: Abstraction has 4188 states and 10765 transitions. [2021-06-12 19:19:25,655 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) [2021-06-12 19:19:25,655 INFO L276 IsEmpty]: Start isEmpty. Operand 4188 states and 10765 transitions. [2021-06-12 19:19:25,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-12 19:19:25,658 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:19:25,658 INFO L472 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:19:25,858 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable345 [2021-06-12 19:19:25,859 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:19:25,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:19:25,859 INFO L82 PathProgramCache]: Analyzing trace with hash 667584024, now seen corresponding path program 89 times [2021-06-12 19:19:25,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:19:25,859 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133993531] [2021-06-12 19:19:25,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:19:25,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:19:25,907 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-12 19:19:25,908 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:19:25,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133993531] [2021-06-12 19:19:25,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133993531] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:19:25,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862908326] [2021-06-12 19:19:25,908 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 [2021-06-12 19:19:25,956 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-06-12 19:19:25,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:19:25,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:19:25,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:19:26,015 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-12 19:19:26,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1862908326] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:19:26,016 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:19:26,016 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-12 19:19:26,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253491063] [2021-06-12 19:19:26,016 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 19:19:26,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:19:26,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 19:19:26,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-12 19:19:26,016 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) [2021-06-12 19:19:26,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:19:26,204 INFO L93 Difference]: Finished difference Result 4818 states and 11987 transitions. [2021-06-12 19:19:26,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 19:19:26,204 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 [2021-06-12 19:19:26,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:19:26,209 INFO L225 Difference]: With dead ends: 4818 [2021-06-12 19:19:26,209 INFO L226 Difference]: Without dead ends: 4783 [2021-06-12 19:19:26,209 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 39.4ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-12 19:19:26,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4783 states. [2021-06-12 19:19:26,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4783 to 4206. [2021-06-12 19:19:26,245 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) [2021-06-12 19:19:26,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4206 states to 4206 states and 10803 transitions. [2021-06-12 19:19:26,250 INFO L78 Accepts]: Start accepts. Automaton has 4206 states and 10803 transitions. Word has length 44 [2021-06-12 19:19:26,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:19:26,250 INFO L482 AbstractCegarLoop]: Abstraction has 4206 states and 10803 transitions. [2021-06-12 19:19:26,250 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) [2021-06-12 19:19:26,250 INFO L276 IsEmpty]: Start isEmpty. Operand 4206 states and 10803 transitions. [2021-06-12 19:19:26,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-12 19:19:26,253 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:19:26,253 INFO L472 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:19:26,453 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable346,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:19:26,454 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:19:26,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:19:26,454 INFO L82 PathProgramCache]: Analyzing trace with hash -19269454, now seen corresponding path program 90 times [2021-06-12 19:19:26,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:19:26,454 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740394208] [2021-06-12 19:19:26,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:19:26,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:19:26,499 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-12 19:19:26,499 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:19:26,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740394208] [2021-06-12 19:19:26,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740394208] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:19:26,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939945456] [2021-06-12 19:19:26,499 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 [2021-06-12 19:19:26,528 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-06-12 19:19:26,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:19:26,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:19:26,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:19:26,661 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 19 proven. 60 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:19:26,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [939945456] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:19:26,661 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:19:26,661 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-12 19:19:26,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281543073] [2021-06-12 19:19:26,662 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:19:26,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:19:26,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:19:26,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:19:26,662 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) [2021-06-12 19:19:27,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:19:27,272 INFO L93 Difference]: Finished difference Result 6446 states and 15040 transitions. [2021-06-12 19:19:27,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-12 19:19:27,272 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 [2021-06-12 19:19:27,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:19:27,279 INFO L225 Difference]: With dead ends: 6446 [2021-06-12 19:19:27,279 INFO L226 Difference]: Without dead ends: 6383 [2021-06-12 19:19:27,280 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 277.1ms TimeCoverageRelationStatistics Valid=207, Invalid=849, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 19:19:27,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6383 states. [2021-06-12 19:19:27,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6383 to 4276. [2021-06-12 19:19:27,322 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) [2021-06-12 19:19:27,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4276 states to 4276 states and 10946 transitions. [2021-06-12 19:19:27,328 INFO L78 Accepts]: Start accepts. Automaton has 4276 states and 10946 transitions. Word has length 44 [2021-06-12 19:19:27,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:19:27,328 INFO L482 AbstractCegarLoop]: Abstraction has 4276 states and 10946 transitions. [2021-06-12 19:19:27,328 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) [2021-06-12 19:19:27,328 INFO L276 IsEmpty]: Start isEmpty. Operand 4276 states and 10946 transitions. [2021-06-12 19:19:27,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-12 19:19:27,331 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:19:27,331 INFO L472 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:19:27,531 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable347 [2021-06-12 19:19:27,531 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:19:27,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:19:27,531 INFO L82 PathProgramCache]: Analyzing trace with hash -847034408, now seen corresponding path program 91 times [2021-06-12 19:19:27,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:19:27,532 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677722904] [2021-06-12 19:19:27,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:19:27,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:19:27,578 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-12 19:19:27,578 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:19:27,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677722904] [2021-06-12 19:19:27,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677722904] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:19:27,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008790717] [2021-06-12 19:19:27,578 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 [2021-06-12 19:19:27,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:19:27,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:19:27,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:19:27,661 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-12 19:19:27,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1008790717] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:19:27,661 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:19:27,661 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-12 19:19:27,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570492267] [2021-06-12 19:19:27,662 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-12 19:19:27,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:19:27,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-12 19:19:27,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-12 19:19:27,662 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) [2021-06-12 19:19:27,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:19:27,861 INFO L93 Difference]: Finished difference Result 4915 states and 12209 transitions. [2021-06-12 19:19:27,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-12 19:19:27,861 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 [2021-06-12 19:19:27,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:19:27,866 INFO L225 Difference]: With dead ends: 4915 [2021-06-12 19:19:27,866 INFO L226 Difference]: Without dead ends: 4877 [2021-06-12 19:19:27,866 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 36.5ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-12 19:19:27,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4877 states. [2021-06-12 19:19:27,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4877 to 4348. [2021-06-12 19:19:27,906 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) [2021-06-12 19:19:27,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4348 states to 4348 states and 11085 transitions. [2021-06-12 19:19:27,912 INFO L78 Accepts]: Start accepts. Automaton has 4348 states and 11085 transitions. Word has length 44 [2021-06-12 19:19:27,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:19:27,912 INFO L482 AbstractCegarLoop]: Abstraction has 4348 states and 11085 transitions. [2021-06-12 19:19:27,912 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) [2021-06-12 19:19:27,912 INFO L276 IsEmpty]: Start isEmpty. Operand 4348 states and 11085 transitions. [2021-06-12 19:19:27,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-12 19:19:27,915 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:19:27,915 INFO L472 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:19:28,115 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable348,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:19:28,116 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:19:28,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:19:28,116 INFO L82 PathProgramCache]: Analyzing trace with hash 909434610, now seen corresponding path program 92 times [2021-06-12 19:19:28,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:19:28,116 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973552246] [2021-06-12 19:19:28,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:19:28,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:19:28,160 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-12 19:19:28,161 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:19:28,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973552246] [2021-06-12 19:19:28,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973552246] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:19:28,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839904716] [2021-06-12 19:19:28,161 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 [2021-06-12 19:19:28,186 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:19:28,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:19:28,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:19:28,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:19:28,318 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 17 proven. 62 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:19:28,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1839904716] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:19:28,319 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:19:28,319 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-12 19:19:28,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184819846] [2021-06-12 19:19:28,319 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:19:28,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:19:28,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:19:28,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:19:28,320 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) [2021-06-12 19:19:28,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:19:28,997 INFO L93 Difference]: Finished difference Result 6734 states and 15579 transitions. [2021-06-12 19:19:28,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-12 19:19:28,998 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 [2021-06-12 19:19:28,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:19:29,004 INFO L225 Difference]: With dead ends: 6734 [2021-06-12 19:19:29,004 INFO L226 Difference]: Without dead ends: 6671 [2021-06-12 19:19:29,004 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 296.6ms TimeCoverageRelationStatistics Valid=207, Invalid=849, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 19:19:29,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6671 states. [2021-06-12 19:19:29,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6671 to 4452. [2021-06-12 19:19:29,047 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) [2021-06-12 19:19:29,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4452 states to 4452 states and 11289 transitions. [2021-06-12 19:19:29,053 INFO L78 Accepts]: Start accepts. Automaton has 4452 states and 11289 transitions. Word has length 44 [2021-06-12 19:19:29,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:19:29,053 INFO L482 AbstractCegarLoop]: Abstraction has 4452 states and 11289 transitions. [2021-06-12 19:19:29,053 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) [2021-06-12 19:19:29,053 INFO L276 IsEmpty]: Start isEmpty. Operand 4452 states and 11289 transitions. [2021-06-12 19:19:29,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-06-12 19:19:29,056 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:19:29,056 INFO L472 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:19:29,256 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable349,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:19:29,257 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:19:29,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:19:29,257 INFO L82 PathProgramCache]: Analyzing trace with hash -2003584616, now seen corresponding path program 93 times [2021-06-12 19:19:29,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:19:29,257 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242402608] [2021-06-12 19:19:29,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:19:29,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:19:29,300 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-12 19:19:29,301 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:19:29,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242402608] [2021-06-12 19:19:29,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242402608] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:19:29,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977599168] [2021-06-12 19:19:29,301 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 [2021-06-12 19:19:29,328 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-12 19:19:29,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:19:29,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-12 19:19:29,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:19:29,461 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 26 proven. 54 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:19:29,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [977599168] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:19:29,461 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:19:29,461 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-06-12 19:19:29,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733704363] [2021-06-12 19:19:29,461 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:19:29,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:19:29,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:19:29,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:19:29,462 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) [2021-06-12 19:19:30,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:19:30,117 INFO L93 Difference]: Finished difference Result 7036 states and 16396 transitions. [2021-06-12 19:19:30,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-12 19:19:30,117 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 [2021-06-12 19:19:30,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:19:30,124 INFO L225 Difference]: With dead ends: 7036 [2021-06-12 19:19:30,125 INFO L226 Difference]: Without dead ends: 6998 [2021-06-12 19:19:30,125 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 288.0ms TimeCoverageRelationStatistics Valid=207, Invalid=849, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 19:19:30,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6998 states. [2021-06-12 19:19:30,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6998 to 4889. [2021-06-12 19:19:30,173 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) [2021-06-12 19:19:30,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4889 states to 4889 states and 12408 transitions. [2021-06-12 19:19:30,179 INFO L78 Accepts]: Start accepts. Automaton has 4889 states and 12408 transitions. Word has length 44 [2021-06-12 19:19:30,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:19:30,179 INFO L482 AbstractCegarLoop]: Abstraction has 4889 states and 12408 transitions. [2021-06-12 19:19:30,179 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) [2021-06-12 19:19:30,179 INFO L276 IsEmpty]: Start isEmpty. Operand 4889 states and 12408 transitions. [2021-06-12 19:19:30,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-12 19:19:30,183 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:19:30,183 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:19:30,383 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable350,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:19:30,383 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:19:30,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:19:30,384 INFO L82 PathProgramCache]: Analyzing trace with hash 106678869, now seen corresponding path program 38 times [2021-06-12 19:19:30,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:19:30,384 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880823252] [2021-06-12 19:19:30,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:19:30,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:19:30,494 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:19:30,494 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:19:30,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880823252] [2021-06-12 19:19:30,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880823252] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:19:30,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126679892] [2021-06-12 19:19:30,495 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-12 19:19:30,521 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:19:30,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:19:30,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 19:19:30,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:19:31,208 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 36 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:19:31,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126679892] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:19:31,209 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:19:31,209 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 29 [2021-06-12 19:19:31,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023908348] [2021-06-12 19:19:31,209 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-12 19:19:31,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:19:31,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-12 19:19:31,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=777, Unknown=0, NotChecked=0, Total=870 [2021-06-12 19:19:31,209 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) [2021-06-12 19:19:39,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:19:39,197 INFO L93 Difference]: Finished difference Result 12578 states and 28875 transitions. [2021-06-12 19:19:39,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 194 states. [2021-06-12 19:19:39,197 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 [2021-06-12 19:19:39,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:19:39,210 INFO L225 Difference]: With dead ends: 12578 [2021-06-12 19:19:39,210 INFO L226 Difference]: Without dead ends: 12155 [2021-06-12 19:19:39,213 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 210 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17409 ImplicationChecksByTransitivity, 6563.6ms TimeCoverageRelationStatistics Valid=5955, Invalid=38777, Unknown=0, NotChecked=0, Total=44732 [2021-06-12 19:19:39,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12155 states. [2021-06-12 19:19:39,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12155 to 6139. [2021-06-12 19:19:39,298 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) [2021-06-12 19:19:39,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6139 states to 6139 states and 16102 transitions. [2021-06-12 19:19:39,306 INFO L78 Accepts]: Start accepts. Automaton has 6139 states and 16102 transitions. Word has length 47 [2021-06-12 19:19:39,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:19:39,306 INFO L482 AbstractCegarLoop]: Abstraction has 6139 states and 16102 transitions. [2021-06-12 19:19:39,306 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) [2021-06-12 19:19:39,306 INFO L276 IsEmpty]: Start isEmpty. Operand 6139 states and 16102 transitions. [2021-06-12 19:19:39,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-12 19:19:39,310 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:19:39,310 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:19:39,510 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable351,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:19:39,511 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:19:39,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:19:39,511 INFO L82 PathProgramCache]: Analyzing trace with hash -1531001323, now seen corresponding path program 94 times [2021-06-12 19:19:39,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:19:39,511 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742684362] [2021-06-12 19:19:39,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:19:39,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:19:39,636 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 13 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:19:39,636 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:19:39,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742684362] [2021-06-12 19:19:39,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742684362] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:19:39,636 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025157802] [2021-06-12 19:19:39,636 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 [2021-06-12 19:19:39,699 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:19:39,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:19:39,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 19:19:39,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:19:39,918 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 11 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:19:39,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1025157802] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:19:39,919 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:19:39,919 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-06-12 19:19:39,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877336340] [2021-06-12 19:19:39,919 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 19:19:39,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:19:39,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 19:19:39,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:19:39,919 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) [2021-06-12 19:19:40,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:19:40,702 INFO L93 Difference]: Finished difference Result 6357 states and 16438 transitions. [2021-06-12 19:19:40,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:19:40,702 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 [2021-06-12 19:19:40,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:19:40,709 INFO L225 Difference]: With dead ends: 6357 [2021-06-12 19:19:40,709 INFO L226 Difference]: Without dead ends: 6277 [2021-06-12 19:19:40,709 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 216.4ms TimeCoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:19:40,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6277 states. [2021-06-12 19:19:40,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6277 to 6123. [2021-06-12 19:19:40,761 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) [2021-06-12 19:19:40,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6123 states to 6123 states and 16046 transitions. [2021-06-12 19:19:40,769 INFO L78 Accepts]: Start accepts. Automaton has 6123 states and 16046 transitions. Word has length 47 [2021-06-12 19:19:40,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:19:40,769 INFO L482 AbstractCegarLoop]: Abstraction has 6123 states and 16046 transitions. [2021-06-12 19:19:40,769 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) [2021-06-12 19:19:40,769 INFO L276 IsEmpty]: Start isEmpty. Operand 6123 states and 16046 transitions. [2021-06-12 19:19:40,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-12 19:19:40,773 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:19:40,773 INFO L472 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:19:40,976 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable361,183 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:19:40,977 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:19:40,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:19:40,977 INFO L82 PathProgramCache]: Analyzing trace with hash 1758131688, now seen corresponding path program 39 times [2021-06-12 19:19:40,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:19:40,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313385404] [2021-06-12 19:19:40,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:19:40,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:19:41,034 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 44 proven. 54 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:19:41,034 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:19:41,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313385404] [2021-06-12 19:19:41,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313385404] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:19:41,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292572727] [2021-06-12 19:19:41,035 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 [2021-06-12 19:19:41,063 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-12 19:19:41,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:19:41,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 19:19:41,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:19:41,145 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 45 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:19:41,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1292572727] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:19:41,145 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:19:41,145 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 10 [2021-06-12 19:19:41,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273449814] [2021-06-12 19:19:41,145 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:19:41,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:19:41,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:19:41,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:19:41,146 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) [2021-06-12 19:19:41,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:19:41,345 INFO L93 Difference]: Finished difference Result 8127 states and 20029 transitions. [2021-06-12 19:19:41,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:19:41,346 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 [2021-06-12 19:19:41,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:19:41,357 INFO L225 Difference]: With dead ends: 8127 [2021-06-12 19:19:41,357 INFO L226 Difference]: Without dead ends: 8117 [2021-06-12 19:19:41,358 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 68.1ms TimeCoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:19:41,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8117 states. [2021-06-12 19:19:41,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8117 to 6179. [2021-06-12 19:19:41,440 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) [2021-06-12 19:19:41,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6179 states to 6179 states and 16226 transitions. [2021-06-12 19:19:41,448 INFO L78 Accepts]: Start accepts. Automaton has 6179 states and 16226 transitions. Word has length 47 [2021-06-12 19:19:41,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:19:41,448 INFO L482 AbstractCegarLoop]: Abstraction has 6179 states and 16226 transitions. [2021-06-12 19:19:41,448 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) [2021-06-12 19:19:41,448 INFO L276 IsEmpty]: Start isEmpty. Operand 6179 states and 16226 transitions. [2021-06-12 19:19:41,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-12 19:19:41,453 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:19:41,453 INFO L472 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:19:41,660 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable362,184 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:19:41,661 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:19:41,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:19:41,661 INFO L82 PathProgramCache]: Analyzing trace with hash 800939048, now seen corresponding path program 40 times [2021-06-12 19:19:41,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:19:41,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137699026] [2021-06-12 19:19:41,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:19:41,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:19:41,715 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 59 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:19:41,716 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:19:41,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137699026] [2021-06-12 19:19:41,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137699026] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:19:41,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283427278] [2021-06-12 19:19:41,716 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 [2021-06-12 19:19:41,741 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:19:41,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:19:41,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 19:19:41,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:19:41,816 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 60 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:19:41,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1283427278] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:19:41,817 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:19:41,817 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 10 [2021-06-12 19:19:41,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497686542] [2021-06-12 19:19:41,817 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:19:41,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:19:41,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:19:41,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:19:41,817 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) [2021-06-12 19:19:41,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:19:41,972 INFO L93 Difference]: Finished difference Result 9199 states and 22998 transitions. [2021-06-12 19:19:41,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:19:41,973 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 [2021-06-12 19:19:41,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:19:41,983 INFO L225 Difference]: With dead ends: 9199 [2021-06-12 19:19:41,983 INFO L226 Difference]: Without dead ends: 9199 [2021-06-12 19:19:41,983 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 60.4ms TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:19:41,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9199 states. [2021-06-12 19:19:42,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9199 to 6799. [2021-06-12 19:19:42,071 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) [2021-06-12 19:19:42,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6799 states to 6799 states and 18180 transitions. [2021-06-12 19:19:42,081 INFO L78 Accepts]: Start accepts. Automaton has 6799 states and 18180 transitions. Word has length 47 [2021-06-12 19:19:42,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:19:42,081 INFO L482 AbstractCegarLoop]: Abstraction has 6799 states and 18180 transitions. [2021-06-12 19:19:42,081 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) [2021-06-12 19:19:42,081 INFO L276 IsEmpty]: Start isEmpty. Operand 6799 states and 18180 transitions. [2021-06-12 19:19:42,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-12 19:19:42,086 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:19:42,086 INFO L472 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:19:42,286 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable365 [2021-06-12 19:19:42,287 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:19:42,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:19:42,287 INFO L82 PathProgramCache]: Analyzing trace with hash 267073672, now seen corresponding path program 95 times [2021-06-12 19:19:42,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:19:42,287 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393481968] [2021-06-12 19:19:42,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:19:42,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:19:42,345 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 48 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:19:42,345 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:19:42,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393481968] [2021-06-12 19:19:42,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393481968] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:19:42,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400346031] [2021-06-12 19:19:42,345 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 [2021-06-12 19:19:42,372 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-12 19:19:42,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:19:42,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 19:19:42,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:19:42,468 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 49 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:19:42,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1400346031] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:19:42,469 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:19:42,469 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 15 [2021-06-12 19:19:42,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418603932] [2021-06-12 19:19:42,469 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:19:42,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:19:42,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:19:42,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:19:42,469 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) [2021-06-12 19:19:42,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:19:42,704 INFO L93 Difference]: Finished difference Result 7639 states and 19695 transitions. [2021-06-12 19:19:42,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:19:42,705 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 [2021-06-12 19:19:42,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:19:42,715 INFO L225 Difference]: With dead ends: 7639 [2021-06-12 19:19:42,715 INFO L226 Difference]: Without dead ends: 7633 [2021-06-12 19:19:42,715 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 85.7ms TimeCoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:19:42,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7633 states. [2021-06-12 19:19:42,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7633 to 6743. [2021-06-12 19:19:42,819 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) [2021-06-12 19:19:42,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6743 states to 6743 states and 18003 transitions. [2021-06-12 19:19:42,828 INFO L78 Accepts]: Start accepts. Automaton has 6743 states and 18003 transitions. Word has length 47 [2021-06-12 19:19:42,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:19:42,829 INFO L482 AbstractCegarLoop]: Abstraction has 6743 states and 18003 transitions. [2021-06-12 19:19:42,829 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) [2021-06-12 19:19:42,829 INFO L276 IsEmpty]: Start isEmpty. Operand 6743 states and 18003 transitions. [2021-06-12 19:19:42,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-12 19:19:42,833 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:19:42,833 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:19:43,033 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 186 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable366 [2021-06-12 19:19:43,034 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:19:43,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:19:43,034 INFO L82 PathProgramCache]: Analyzing trace with hash -38499627, now seen corresponding path program 41 times [2021-06-12 19:19:43,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:19:43,034 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401499075] [2021-06-12 19:19:43,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:19:43,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:19:43,108 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 7 proven. 87 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:19:43,108 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:19:43,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401499075] [2021-06-12 19:19:43,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401499075] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:19:43,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175421703] [2021-06-12 19:19:43,108 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 [2021-06-12 19:19:43,136 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-06-12 19:19:43,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:19:43,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 19:19:43,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:19:43,207 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 88 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:19:43,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [175421703] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:19:43,207 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:19:43,207 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-12 19:19:43,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549218332] [2021-06-12 19:19:43,208 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 19:19:43,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:19:43,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 19:19:43,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:19:43,208 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) [2021-06-12 19:19:43,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:19:43,518 INFO L93 Difference]: Finished difference Result 7999 states and 20457 transitions. [2021-06-12 19:19:43,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:19:43,518 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 [2021-06-12 19:19:43,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:19:43,528 INFO L225 Difference]: With dead ends: 7999 [2021-06-12 19:19:43,528 INFO L226 Difference]: Without dead ends: 7961 [2021-06-12 19:19:43,528 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 106.2ms TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:19:43,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7961 states. [2021-06-12 19:19:43,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7961 to 6838. [2021-06-12 19:19:43,606 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) [2021-06-12 19:19:43,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6838 states to 6838 states and 18239 transitions. [2021-06-12 19:19:43,616 INFO L78 Accepts]: Start accepts. Automaton has 6838 states and 18239 transitions. Word has length 47 [2021-06-12 19:19:43,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:19:43,616 INFO L482 AbstractCegarLoop]: Abstraction has 6838 states and 18239 transitions. [2021-06-12 19:19:43,617 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) [2021-06-12 19:19:43,617 INFO L276 IsEmpty]: Start isEmpty. Operand 6838 states and 18239 transitions. [2021-06-12 19:19:43,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-12 19:19:43,621 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:19:43,621 INFO L472 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:19:43,822 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable369,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:19:43,822 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:19:43,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:19:43,822 INFO L82 PathProgramCache]: Analyzing trace with hash -1592196484, now seen corresponding path program 96 times [2021-06-12 19:19:43,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:19:43,822 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140708126] [2021-06-12 19:19:43,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:19:43,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:19:43,870 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 45 proven. 49 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-12 19:19:43,870 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:19:43,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140708126] [2021-06-12 19:19:43,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140708126] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:19:43,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900647086] [2021-06-12 19:19:43,870 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 [2021-06-12 19:19:43,899 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-12 19:19:43,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:19:43,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 19:19:43,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:19:43,963 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 45 proven. 49 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-12 19:19:43,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1900647086] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:19:43,963 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:19:43,963 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-06-12 19:19:43,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590217859] [2021-06-12 19:19:43,963 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 19:19:43,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:19:43,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 19:19:43,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-06-12 19:19:43,964 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) [2021-06-12 19:19:44,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:19:44,095 INFO L93 Difference]: Finished difference Result 7980 states and 20237 transitions. [2021-06-12 19:19:44,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:19:44,095 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 [2021-06-12 19:19:44,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:19:44,104 INFO L225 Difference]: With dead ends: 7980 [2021-06-12 19:19:44,104 INFO L226 Difference]: Without dead ends: 7977 [2021-06-12 19:19:44,104 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 42.9ms TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:19:44,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7977 states. [2021-06-12 19:19:44,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7977 to 6818. [2021-06-12 19:19:44,186 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) [2021-06-12 19:19:44,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6818 states to 6818 states and 18165 transitions. [2021-06-12 19:19:44,197 INFO L78 Accepts]: Start accepts. Automaton has 6818 states and 18165 transitions. Word has length 47 [2021-06-12 19:19:44,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:19:44,197 INFO L482 AbstractCegarLoop]: Abstraction has 6818 states and 18165 transitions. [2021-06-12 19:19:44,197 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) [2021-06-12 19:19:44,197 INFO L276 IsEmpty]: Start isEmpty. Operand 6818 states and 18165 transitions. [2021-06-12 19:19:44,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-12 19:19:44,202 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:19:44,202 INFO L472 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:19:44,402 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable370 [2021-06-12 19:19:44,403 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:19:44,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:19:44,403 INFO L82 PathProgramCache]: Analyzing trace with hash -1385133918, now seen corresponding path program 97 times [2021-06-12 19:19:44,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:19:44,403 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718470125] [2021-06-12 19:19:44,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:19:44,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:19:44,456 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 42 proven. 52 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-12 19:19:44,456 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:19:44,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718470125] [2021-06-12 19:19:44,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718470125] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:19:44,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1613626483] [2021-06-12 19:19:44,456 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 [2021-06-12 19:19:44,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:19:44,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 19:19:44,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:19:44,567 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 42 proven. 52 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-12 19:19:44,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1613626483] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:19:44,567 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:19:44,567 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-12 19:19:44,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90758264] [2021-06-12 19:19:44,567 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 19:19:44,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:19:44,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 19:19:44,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:19:44,568 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) [2021-06-12 19:19:44,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:19:44,769 INFO L93 Difference]: Finished difference Result 7990 states and 20202 transitions. [2021-06-12 19:19:44,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:19:44,770 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 [2021-06-12 19:19:44,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:19:44,780 INFO L225 Difference]: With dead ends: 7990 [2021-06-12 19:19:44,780 INFO L226 Difference]: Without dead ends: 7972 [2021-06-12 19:19:44,780 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 68.0ms TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:19:44,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7972 states. [2021-06-12 19:19:44,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7972 to 6576. [2021-06-12 19:19:44,887 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) [2021-06-12 19:19:44,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6576 states to 6576 states and 17436 transitions. [2021-06-12 19:19:44,901 INFO L78 Accepts]: Start accepts. Automaton has 6576 states and 17436 transitions. Word has length 47 [2021-06-12 19:19:44,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:19:44,901 INFO L482 AbstractCegarLoop]: Abstraction has 6576 states and 17436 transitions. [2021-06-12 19:19:44,901 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) [2021-06-12 19:19:44,901 INFO L276 IsEmpty]: Start isEmpty. Operand 6576 states and 17436 transitions. [2021-06-12 19:19:44,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-12 19:19:44,909 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:19:44,909 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:19:45,124 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable372,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:19:45,125 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:19:45,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:19:45,125 INFO L82 PathProgramCache]: Analyzing trace with hash 1461833365, now seen corresponding path program 98 times [2021-06-12 19:19:45,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:19:45,125 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890472443] [2021-06-12 19:19:45,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:19:45,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:19:45,190 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 16 proven. 78 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:19:45,190 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:19:45,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890472443] [2021-06-12 19:19:45,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890472443] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:19:45,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260888966] [2021-06-12 19:19:45,190 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-12 19:19:45,221 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:19:45,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:19:45,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 19:19:45,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:19:45,302 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 11 proven. 83 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:19:45,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1260888966] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:19:45,303 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:19:45,303 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-06-12 19:19:45,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364072035] [2021-06-12 19:19:45,303 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 19:19:45,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:19:45,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 19:19:45,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:19:45,303 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) [2021-06-12 19:19:45,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:19:45,719 INFO L93 Difference]: Finished difference Result 7270 states and 18664 transitions. [2021-06-12 19:19:45,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:19:45,720 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 [2021-06-12 19:19:45,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:19:45,727 INFO L225 Difference]: With dead ends: 7270 [2021-06-12 19:19:45,728 INFO L226 Difference]: Without dead ends: 7232 [2021-06-12 19:19:45,728 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 104.0ms TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:19:45,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7232 states. [2021-06-12 19:19:45,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7232 to 6547. [2021-06-12 19:19:45,825 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) [2021-06-12 19:19:45,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6547 states to 6547 states and 17357 transitions. [2021-06-12 19:19:45,836 INFO L78 Accepts]: Start accepts. Automaton has 6547 states and 17357 transitions. Word has length 47 [2021-06-12 19:19:45,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:19:45,837 INFO L482 AbstractCegarLoop]: Abstraction has 6547 states and 17357 transitions. [2021-06-12 19:19:45,837 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) [2021-06-12 19:19:45,837 INFO L276 IsEmpty]: Start isEmpty. Operand 6547 states and 17357 transitions. [2021-06-12 19:19:45,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-12 19:19:45,842 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:19:45,842 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:19:46,042 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable375 [2021-06-12 19:19:46,042 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:19:46,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:19:46,043 INFO L82 PathProgramCache]: Analyzing trace with hash 848297185, now seen corresponding path program 99 times [2021-06-12 19:19:46,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:19:46,043 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333373419] [2021-06-12 19:19:46,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:19:46,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:19:46,127 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 13 proven. 79 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-12 19:19:46,128 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:19:46,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333373419] [2021-06-12 19:19:46,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333373419] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:19:46,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035842287] [2021-06-12 19:19:46,128 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 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 [2021-06-12 19:19:46,160 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-12 19:19:46,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:19:46,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 19:19:46,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:19:46,233 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 80 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-12 19:19:46,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035842287] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:19:46,234 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:19:46,234 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-12 19:19:46,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515826386] [2021-06-12 19:19:46,234 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 19:19:46,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:19:46,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 19:19:46,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:19:46,234 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) [2021-06-12 19:19:46,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:19:46,575 INFO L93 Difference]: Finished difference Result 7510 states and 19214 transitions. [2021-06-12 19:19:46,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:19:46,575 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 [2021-06-12 19:19:46,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:19:46,585 INFO L225 Difference]: With dead ends: 7510 [2021-06-12 19:19:46,585 INFO L226 Difference]: Without dead ends: 7498 [2021-06-12 19:19:46,586 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 114.9ms TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:19:46,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7498 states. [2021-06-12 19:19:46,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7498 to 6557. [2021-06-12 19:19:46,659 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) [2021-06-12 19:19:46,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6557 states to 6557 states and 17377 transitions. [2021-06-12 19:19:46,668 INFO L78 Accepts]: Start accepts. Automaton has 6557 states and 17377 transitions. Word has length 47 [2021-06-12 19:19:46,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:19:46,668 INFO L482 AbstractCegarLoop]: Abstraction has 6557 states and 17377 transitions. [2021-06-12 19:19:46,668 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) [2021-06-12 19:19:46,668 INFO L276 IsEmpty]: Start isEmpty. Operand 6557 states and 17377 transitions. [2021-06-12 19:19:46,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-12 19:19:46,672 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:19:46,672 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:19:46,872 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 191 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable376 [2021-06-12 19:19:46,873 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:19:46,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:19:46,873 INFO L82 PathProgramCache]: Analyzing trace with hash -1304752777, now seen corresponding path program 100 times [2021-06-12 19:19:46,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:19:46,873 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385577505] [2021-06-12 19:19:46,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:19:46,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:19:46,941 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 84 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:19:46,941 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:19:46,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385577505] [2021-06-12 19:19:46,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385577505] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:19:46,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389019250] [2021-06-12 19:19:46,941 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 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 [2021-06-12 19:19:46,967 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:19:46,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:19:46,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 19:19:46,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:19:47,035 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 84 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:19:47,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [389019250] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:19:47,035 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:19:47,035 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-12 19:19:47,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901341776] [2021-06-12 19:19:47,036 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:19:47,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:19:47,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:19:47,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:19:47,036 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) [2021-06-12 19:19:47,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:19:47,423 INFO L93 Difference]: Finished difference Result 8002 states and 20257 transitions. [2021-06-12 19:19:47,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 19:19:47,424 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 [2021-06-12 19:19:47,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:19:47,432 INFO L225 Difference]: With dead ends: 8002 [2021-06-12 19:19:47,433 INFO L226 Difference]: Without dead ends: 7990 [2021-06-12 19:19:47,433 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 127.2ms TimeCoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:19:47,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7990 states. [2021-06-12 19:19:47,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7990 to 6589. [2021-06-12 19:19:47,509 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) [2021-06-12 19:19:47,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6589 states to 6589 states and 17455 transitions. [2021-06-12 19:19:47,519 INFO L78 Accepts]: Start accepts. Automaton has 6589 states and 17455 transitions. Word has length 47 [2021-06-12 19:19:47,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:19:47,519 INFO L482 AbstractCegarLoop]: Abstraction has 6589 states and 17455 transitions. [2021-06-12 19:19:47,519 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) [2021-06-12 19:19:47,519 INFO L276 IsEmpty]: Start isEmpty. Operand 6589 states and 17455 transitions. [2021-06-12 19:19:47,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-12 19:19:47,524 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:19:47,524 INFO L472 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:19:47,724 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 192 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable377 [2021-06-12 19:19:47,724 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:19:47,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:19:47,724 INFO L82 PathProgramCache]: Analyzing trace with hash -1542814294, now seen corresponding path program 42 times [2021-06-12 19:19:47,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:19:47,725 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264907297] [2021-06-12 19:19:47,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:19:47,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:19:47,776 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 63 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:19:47,776 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:19:47,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264907297] [2021-06-12 19:19:47,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264907297] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:19:47,776 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529615478] [2021-06-12 19:19:47,776 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 [2021-06-12 19:19:47,804 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-12 19:19:47,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:19:47,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 19:19:47,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:19:47,919 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 64 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:19:47,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1529615478] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:19:47,919 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:19:47,919 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 14] total 16 [2021-06-12 19:19:47,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222103442] [2021-06-12 19:19:47,919 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:19:47,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:19:47,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:19:47,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:19:47,920 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) [2021-06-12 19:19:48,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:19:48,155 INFO L93 Difference]: Finished difference Result 9290 states and 23114 transitions. [2021-06-12 19:19:48,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 19:19:48,155 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 [2021-06-12 19:19:48,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:19:48,165 INFO L225 Difference]: With dead ends: 9290 [2021-06-12 19:19:48,166 INFO L226 Difference]: Without dead ends: 9268 [2021-06-12 19:19:48,166 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 130.5ms TimeCoverageRelationStatistics Valid=175, Invalid=287, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:19:48,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9268 states. [2021-06-12 19:19:48,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9268 to 6764. [2021-06-12 19:19:48,248 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) [2021-06-12 19:19:48,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6764 states to 6764 states and 17975 transitions. [2021-06-12 19:19:48,257 INFO L78 Accepts]: Start accepts. Automaton has 6764 states and 17975 transitions. Word has length 47 [2021-06-12 19:19:48,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:19:48,257 INFO L482 AbstractCegarLoop]: Abstraction has 6764 states and 17975 transitions. [2021-06-12 19:19:48,257 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) [2021-06-12 19:19:48,257 INFO L276 IsEmpty]: Start isEmpty. Operand 6764 states and 17975 transitions. [2021-06-12 19:19:48,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-12 19:19:48,261 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:19:48,261 INFO L472 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:19:48,462 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable378 [2021-06-12 19:19:48,462 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:19:48,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:19:48,462 INFO L82 PathProgramCache]: Analyzing trace with hash 2130272592, now seen corresponding path program 43 times [2021-06-12 19:19:48,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:19:48,462 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370949663] [2021-06-12 19:19:48,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:19:48,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:19:48,522 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 63 proven. 34 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:19:48,522 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:19:48,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370949663] [2021-06-12 19:19:48,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370949663] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:19:48,522 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838094109] [2021-06-12 19:19:48,522 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 [2021-06-12 19:19:48,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:19:48,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 19:19:48,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:19:48,622 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 64 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:19:48,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [838094109] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:19:48,622 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:19:48,622 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 10 [2021-06-12 19:19:48,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776291573] [2021-06-12 19:19:48,623 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:19:48,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:19:48,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:19:48,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:19:48,623 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) [2021-06-12 19:19:48,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:19:48,798 INFO L93 Difference]: Finished difference Result 9757 states and 24151 transitions. [2021-06-12 19:19:48,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:19:48,798 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 [2021-06-12 19:19:48,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:19:48,809 INFO L225 Difference]: With dead ends: 9757 [2021-06-12 19:19:48,809 INFO L226 Difference]: Without dead ends: 9757 [2021-06-12 19:19:48,810 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 66.7ms TimeCoverageRelationStatistics Valid=65, Invalid=91, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:19:48,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9757 states. [2021-06-12 19:19:48,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9757 to 6769. [2021-06-12 19:19:48,916 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) [2021-06-12 19:19:48,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6769 states to 6769 states and 17982 transitions. [2021-06-12 19:19:48,927 INFO L78 Accepts]: Start accepts. Automaton has 6769 states and 17982 transitions. Word has length 47 [2021-06-12 19:19:48,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:19:48,927 INFO L482 AbstractCegarLoop]: Abstraction has 6769 states and 17982 transitions. [2021-06-12 19:19:48,927 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) [2021-06-12 19:19:48,928 INFO L276 IsEmpty]: Start isEmpty. Operand 6769 states and 17982 transitions. [2021-06-12 19:19:48,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-12 19:19:48,933 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:19:48,933 INFO L472 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:19:49,133 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable379,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:19:49,133 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:19:49,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:19:49,134 INFO L82 PathProgramCache]: Analyzing trace with hash 492700136, now seen corresponding path program 44 times [2021-06-12 19:19:49,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:19:49,134 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499490260] [2021-06-12 19:19:49,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:19:49,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:19:49,196 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 60 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:19:49,196 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:19:49,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499490260] [2021-06-12 19:19:49,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499490260] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:19:49,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036016058] [2021-06-12 19:19:49,196 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 [2021-06-12 19:19:49,221 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:19:49,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:19:49,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 19:19:49,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:19:49,316 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 61 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:19:49,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2036016058] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:19:49,317 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:19:49,317 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 11 [2021-06-12 19:19:49,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189191021] [2021-06-12 19:19:49,317 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 19:19:49,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:19:49,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 19:19:49,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:19:49,317 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) [2021-06-12 19:19:49,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:19:49,559 INFO L93 Difference]: Finished difference Result 8996 states and 22443 transitions. [2021-06-12 19:19:49,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:19:49,559 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 [2021-06-12 19:19:49,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:19:49,572 INFO L225 Difference]: With dead ends: 8996 [2021-06-12 19:19:49,572 INFO L226 Difference]: Without dead ends: 8996 [2021-06-12 19:19:49,572 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 83.8ms TimeCoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:19:49,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8996 states. [2021-06-12 19:19:49,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8996 to 6596. [2021-06-12 19:19:49,655 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) [2021-06-12 19:19:49,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6596 states to 6596 states and 17477 transitions. [2021-06-12 19:19:49,664 INFO L78 Accepts]: Start accepts. Automaton has 6596 states and 17477 transitions. Word has length 47 [2021-06-12 19:19:49,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:19:49,664 INFO L482 AbstractCegarLoop]: Abstraction has 6596 states and 17477 transitions. [2021-06-12 19:19:49,664 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) [2021-06-12 19:19:49,664 INFO L276 IsEmpty]: Start isEmpty. Operand 6596 states and 17477 transitions. [2021-06-12 19:19:49,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-12 19:19:49,668 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:19:49,668 INFO L472 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:19:49,869 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable380 [2021-06-12 19:19:49,869 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:19:49,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:19:49,869 INFO L82 PathProgramCache]: Analyzing trace with hash 227806332, now seen corresponding path program 101 times [2021-06-12 19:19:49,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:19:49,869 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208136260] [2021-06-12 19:19:49,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:19:49,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:19:49,929 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 44 proven. 54 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:19:49,929 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:19:49,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208136260] [2021-06-12 19:19:49,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208136260] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:19:49,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850705242] [2021-06-12 19:19:49,929 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 [2021-06-12 19:19:49,956 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-12 19:19:49,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:19:49,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 19:19:49,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:19:50,052 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 45 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:19:50,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1850705242] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:19:50,052 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:19:50,052 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15 [2021-06-12 19:19:50,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558935124] [2021-06-12 19:19:50,052 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:19:50,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:19:50,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:19:50,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:19:50,052 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) [2021-06-12 19:19:50,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:19:50,309 INFO L93 Difference]: Finished difference Result 7771 states and 19586 transitions. [2021-06-12 19:19:50,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 19:19:50,310 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 [2021-06-12 19:19:50,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:19:50,318 INFO L225 Difference]: With dead ends: 7771 [2021-06-12 19:19:50,318 INFO L226 Difference]: Without dead ends: 7753 [2021-06-12 19:19:50,318 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 103.8ms TimeCoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:19:50,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7753 states. [2021-06-12 19:19:50,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7753 to 6596. [2021-06-12 19:19:50,386 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) [2021-06-12 19:19:50,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6596 states to 6596 states and 17467 transitions. [2021-06-12 19:19:50,395 INFO L78 Accepts]: Start accepts. Automaton has 6596 states and 17467 transitions. Word has length 47 [2021-06-12 19:19:50,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:19:50,395 INFO L482 AbstractCegarLoop]: Abstraction has 6596 states and 17467 transitions. [2021-06-12 19:19:50,395 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) [2021-06-12 19:19:50,396 INFO L276 IsEmpty]: Start isEmpty. Operand 6596 states and 17467 transitions. [2021-06-12 19:19:50,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-12 19:19:50,400 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:19:50,400 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:19:50,600 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable381,196 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:19:50,601 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:19:50,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:19:50,601 INFO L82 PathProgramCache]: Analyzing trace with hash -866264581, now seen corresponding path program 45 times [2021-06-12 19:19:50,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:19:50,601 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547005942] [2021-06-12 19:19:50,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:19:50,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:19:50,671 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 7 proven. 87 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:19:50,671 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:19:50,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547005942] [2021-06-12 19:19:50,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547005942] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:19:50,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753013741] [2021-06-12 19:19:50,671 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 [2021-06-12 19:19:50,707 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-12 19:19:50,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:19:50,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 19:19:50,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:19:50,896 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:19:50,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1753013741] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:19:50,896 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:19:50,896 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 21 [2021-06-12 19:19:50,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385732939] [2021-06-12 19:19:50,896 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 19:19:50,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:19:50,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 19:19:50,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:19:50,896 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) [2021-06-12 19:19:52,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:19:52,104 INFO L93 Difference]: Finished difference Result 8359 states and 20936 transitions. [2021-06-12 19:19:52,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-12 19:19:52,104 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 [2021-06-12 19:19:52,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:19:52,112 INFO L225 Difference]: With dead ends: 8359 [2021-06-12 19:19:52,112 INFO L226 Difference]: Without dead ends: 8301 [2021-06-12 19:19:52,113 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 355.1ms TimeCoverageRelationStatistics Valid=162, Invalid=1478, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 19:19:52,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8301 states. [2021-06-12 19:19:52,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8301 to 6703. [2021-06-12 19:19:52,182 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) [2021-06-12 19:19:52,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6703 states to 6703 states and 17732 transitions. [2021-06-12 19:19:52,191 INFO L78 Accepts]: Start accepts. Automaton has 6703 states and 17732 transitions. Word has length 47 [2021-06-12 19:19:52,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:19:52,191 INFO L482 AbstractCegarLoop]: Abstraction has 6703 states and 17732 transitions. [2021-06-12 19:19:52,191 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) [2021-06-12 19:19:52,191 INFO L276 IsEmpty]: Start isEmpty. Operand 6703 states and 17732 transitions. [2021-06-12 19:19:52,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-12 19:19:52,196 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:19:52,196 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:19:52,396 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable385 [2021-06-12 19:19:52,397 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:19:52,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:19:52,397 INFO L82 PathProgramCache]: Analyzing trace with hash 634068411, now seen corresponding path program 102 times [2021-06-12 19:19:52,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:19:52,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185152574] [2021-06-12 19:19:52,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:19:52,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:19:52,485 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 16 proven. 78 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:19:52,485 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:19:52,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185152574] [2021-06-12 19:19:52,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185152574] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:19:52,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558895168] [2021-06-12 19:19:52,486 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 [2021-06-12 19:19:52,514 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-06-12 19:19:52,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:19:52,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 19:19:52,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:19:52,597 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 11 proven. 83 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:19:52,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558895168] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:19:52,597 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:19:52,597 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-06-12 19:19:52,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123322922] [2021-06-12 19:19:52,598 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 19:19:52,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:19:52,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 19:19:52,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:19:52,598 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) [2021-06-12 19:19:53,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:19:53,062 INFO L93 Difference]: Finished difference Result 7388 states and 18942 transitions. [2021-06-12 19:19:53,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:19:53,063 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 [2021-06-12 19:19:53,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:19:53,070 INFO L225 Difference]: With dead ends: 7388 [2021-06-12 19:19:53,070 INFO L226 Difference]: Without dead ends: 7332 [2021-06-12 19:19:53,071 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 113.2ms TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:19:53,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7332 states. [2021-06-12 19:19:53,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7332 to 6671. [2021-06-12 19:19:53,144 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) [2021-06-12 19:19:53,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6671 states to 6671 states and 17632 transitions. [2021-06-12 19:19:53,154 INFO L78 Accepts]: Start accepts. Automaton has 6671 states and 17632 transitions. Word has length 47 [2021-06-12 19:19:53,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:19:53,154 INFO L482 AbstractCegarLoop]: Abstraction has 6671 states and 17632 transitions. [2021-06-12 19:19:53,154 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) [2021-06-12 19:19:53,154 INFO L276 IsEmpty]: Start isEmpty. Operand 6671 states and 17632 transitions. [2021-06-12 19:19:53,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-12 19:19:53,158 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:19:53,159 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:19:53,359 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable386 [2021-06-12 19:19:53,359 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:19:53,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:19:53,359 INFO L82 PathProgramCache]: Analyzing trace with hash 20532231, now seen corresponding path program 103 times [2021-06-12 19:19:53,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:19:53,359 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266458144] [2021-06-12 19:19:53,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:19:53,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:19:53,430 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 13 proven. 79 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-12 19:19:53,430 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:19:53,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266458144] [2021-06-12 19:19:53,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266458144] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:19:53,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379791135] [2021-06-12 19:19:53,430 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 [2021-06-12 19:19:53,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:19:53,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 19:19:53,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:19:53,522 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 80 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-12 19:19:53,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1379791135] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:19:53,523 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:19:53,523 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-12 19:19:53,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665723208] [2021-06-12 19:19:53,523 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 19:19:53,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:19:53,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 19:19:53,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:19:53,523 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) [2021-06-12 19:19:53,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:19:53,854 INFO L93 Difference]: Finished difference Result 7705 states and 19640 transitions. [2021-06-12 19:19:53,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:19:53,854 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 [2021-06-12 19:19:53,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:19:53,863 INFO L225 Difference]: With dead ends: 7705 [2021-06-12 19:19:53,863 INFO L226 Difference]: Without dead ends: 7693 [2021-06-12 19:19:53,863 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 104.0ms TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:19:53,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7693 states. [2021-06-12 19:19:53,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7693 to 6695. [2021-06-12 19:19:53,935 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) [2021-06-12 19:19:53,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6695 states to 6695 states and 17686 transitions. [2021-06-12 19:19:53,944 INFO L78 Accepts]: Start accepts. Automaton has 6695 states and 17686 transitions. Word has length 47 [2021-06-12 19:19:53,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:19:53,944 INFO L482 AbstractCegarLoop]: Abstraction has 6695 states and 17686 transitions. [2021-06-12 19:19:53,944 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) [2021-06-12 19:19:53,944 INFO L276 IsEmpty]: Start isEmpty. Operand 6695 states and 17686 transitions. [2021-06-12 19:19:53,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-12 19:19:53,948 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:19:53,948 INFO L472 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:19:54,148 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable387,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:19:54,148 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:19:54,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:19:54,149 INFO L82 PathProgramCache]: Analyzing trace with hash -136767256, now seen corresponding path program 46 times [2021-06-12 19:19:54,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:19:54,149 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414977039] [2021-06-12 19:19:54,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:19:54,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:19:54,198 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 58 proven. 39 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:19:54,198 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:19:54,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414977039] [2021-06-12 19:19:54,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414977039] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:19:54,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793319861] [2021-06-12 19:19:54,198 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 [2021-06-12 19:19:54,222 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:19:54,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:19:54,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 19:19:54,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:19:54,292 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 60 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:19:54,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1793319861] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:19:54,292 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:19:54,292 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 10 [2021-06-12 19:19:54,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532614609] [2021-06-12 19:19:54,292 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:19:54,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:19:54,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:19:54,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:19:54,293 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) [2021-06-12 19:19:54,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:19:54,460 INFO L93 Difference]: Finished difference Result 8625 states and 21596 transitions. [2021-06-12 19:19:54,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:19:54,460 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 [2021-06-12 19:19:54,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:19:54,469 INFO L225 Difference]: With dead ends: 8625 [2021-06-12 19:19:54,469 INFO L226 Difference]: Without dead ends: 8605 [2021-06-12 19:19:54,469 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 67.0ms TimeCoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:19:54,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8605 states. [2021-06-12 19:19:54,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8605 to 6862. [2021-06-12 19:19:54,543 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) [2021-06-12 19:19:54,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6862 states to 6862 states and 18150 transitions. [2021-06-12 19:19:54,552 INFO L78 Accepts]: Start accepts. Automaton has 6862 states and 18150 transitions. Word has length 47 [2021-06-12 19:19:54,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:19:54,553 INFO L482 AbstractCegarLoop]: Abstraction has 6862 states and 18150 transitions. [2021-06-12 19:19:54,553 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) [2021-06-12 19:19:54,553 INFO L276 IsEmpty]: Start isEmpty. Operand 6862 states and 18150 transitions. [2021-06-12 19:19:54,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-12 19:19:54,557 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:19:54,557 INFO L472 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:19:54,757 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable388 [2021-06-12 19:19:54,757 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:19:54,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:19:54,758 INFO L82 PathProgramCache]: Analyzing trace with hash -1627825272, now seen corresponding path program 104 times [2021-06-12 19:19:54,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:19:54,758 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309238433] [2021-06-12 19:19:54,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:19:54,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:19:54,808 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 33 proven. 63 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:19:54,809 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:19:54,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309238433] [2021-06-12 19:19:54,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309238433] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:19:54,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393185881] [2021-06-12 19:19:54,809 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 [2021-06-12 19:19:54,834 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:19:54,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:19:54,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 19:19:54,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:19:54,903 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 33 proven. 63 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:19:54,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [393185881] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:19:54,903 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:19:54,903 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-12 19:19:54,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100982720] [2021-06-12 19:19:54,903 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 19:19:54,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:19:54,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 19:19:54,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:19:54,904 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) [2021-06-12 19:19:55,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:19:55,078 INFO L93 Difference]: Finished difference Result 8135 states and 20382 transitions. [2021-06-12 19:19:55,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:19:55,078 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 [2021-06-12 19:19:55,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:19:55,088 INFO L225 Difference]: With dead ends: 8135 [2021-06-12 19:19:55,088 INFO L226 Difference]: Without dead ends: 8117 [2021-06-12 19:19:55,088 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 63.3ms TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:19:55,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8117 states. [2021-06-12 19:19:55,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8117 to 6838. [2021-06-12 19:19:55,171 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) [2021-06-12 19:19:55,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6838 states to 6838 states and 18053 transitions. [2021-06-12 19:19:55,181 INFO L78 Accepts]: Start accepts. Automaton has 6838 states and 18053 transitions. Word has length 47 [2021-06-12 19:19:55,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:19:55,181 INFO L482 AbstractCegarLoop]: Abstraction has 6838 states and 18053 transitions. [2021-06-12 19:19:55,181 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) [2021-06-12 19:19:55,181 INFO L276 IsEmpty]: Start isEmpty. Operand 6838 states and 18053 transitions. [2021-06-12 19:19:55,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-12 19:19:55,186 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:19:55,186 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:19:55,386 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable391,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:19:55,387 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:19:55,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:19:55,387 INFO L82 PathProgramCache]: Analyzing trace with hash -2132517731, now seen corresponding path program 105 times [2021-06-12 19:19:55,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:19:55,387 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128781186] [2021-06-12 19:19:55,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:19:55,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:19:55,456 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 13 proven. 81 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:19:55,456 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:19:55,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128781186] [2021-06-12 19:19:55,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128781186] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:19:55,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736297632] [2021-06-12 19:19:55,457 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 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 [2021-06-12 19:19:55,488 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-12 19:19:55,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:19:55,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 19:19:55,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:19:55,556 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 82 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:19:55,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1736297632] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:19:55,556 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:19:55,556 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-12 19:19:55,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461326660] [2021-06-12 19:19:55,556 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:19:55,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:19:55,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:19:55,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:19:55,557 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) [2021-06-12 19:19:55,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:19:55,977 INFO L93 Difference]: Finished difference Result 8679 states and 21810 transitions. [2021-06-12 19:19:55,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 19:19:55,978 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 [2021-06-12 19:19:55,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:19:55,986 INFO L225 Difference]: With dead ends: 8679 [2021-06-12 19:19:55,987 INFO L226 Difference]: Without dead ends: 8637 [2021-06-12 19:19:55,987 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 146.8ms TimeCoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:19:55,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8637 states. [2021-06-12 19:19:56,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8637 to 6900. [2021-06-12 19:19:56,059 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) [2021-06-12 19:19:56,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6900 states to 6900 states and 18219 transitions. [2021-06-12 19:19:56,069 INFO L78 Accepts]: Start accepts. Automaton has 6900 states and 18219 transitions. Word has length 47 [2021-06-12 19:19:56,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:19:56,069 INFO L482 AbstractCegarLoop]: Abstraction has 6900 states and 18219 transitions. [2021-06-12 19:19:56,069 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) [2021-06-12 19:19:56,069 INFO L276 IsEmpty]: Start isEmpty. Operand 6900 states and 18219 transitions. [2021-06-12 19:19:56,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-12 19:19:56,074 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:19:56,074 INFO L472 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:19:56,274 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable394,202 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:19:56,274 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:19:56,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:19:56,274 INFO L82 PathProgramCache]: Analyzing trace with hash -599958622, now seen corresponding path program 106 times [2021-06-12 19:19:56,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:19:56,275 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515663717] [2021-06-12 19:19:56,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:19:56,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:19:56,333 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 32 proven. 65 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:19:56,333 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:19:56,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515663717] [2021-06-12 19:19:56,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515663717] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:19:56,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083028019] [2021-06-12 19:19:56,333 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 [2021-06-12 19:19:56,358 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:19:56,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:19:56,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 19:19:56,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:19:56,425 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 32 proven. 65 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:19:56,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083028019] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:19:56,425 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:19:56,425 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-12 19:19:56,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150770237] [2021-06-12 19:19:56,425 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:19:56,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:19:56,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:19:56,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:19:56,426 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) [2021-06-12 19:19:56,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:19:56,619 INFO L93 Difference]: Finished difference Result 8193 states and 20486 transitions. [2021-06-12 19:19:56,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:19:56,620 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 [2021-06-12 19:19:56,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:19:56,629 INFO L225 Difference]: With dead ends: 8193 [2021-06-12 19:19:56,629 INFO L226 Difference]: Without dead ends: 8169 [2021-06-12 19:19:56,629 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 71.9ms TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:19:56,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8169 states. [2021-06-12 19:19:56,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8169 to 6661. [2021-06-12 19:19:56,712 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) [2021-06-12 19:19:56,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6661 states to 6661 states and 17512 transitions. [2021-06-12 19:19:56,723 INFO L78 Accepts]: Start accepts. Automaton has 6661 states and 17512 transitions. Word has length 47 [2021-06-12 19:19:56,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:19:56,723 INFO L482 AbstractCegarLoop]: Abstraction has 6661 states and 17512 transitions. [2021-06-12 19:19:56,723 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) [2021-06-12 19:19:56,723 INFO L276 IsEmpty]: Start isEmpty. Operand 6661 states and 17512 transitions. [2021-06-12 19:19:56,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-12 19:19:56,728 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:19:56,728 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:19:56,928 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable395,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:19:56,929 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:19:56,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:19:56,929 INFO L82 PathProgramCache]: Analyzing trace with hash -1977681197, now seen corresponding path program 107 times [2021-06-12 19:19:56,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:19:56,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795029058] [2021-06-12 19:19:56,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:19:56,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:19:57,006 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 84 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:19:57,007 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:19:57,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795029058] [2021-06-12 19:19:57,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795029058] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:19:57,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620474793] [2021-06-12 19:19:57,007 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 [2021-06-12 19:19:57,035 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-06-12 19:19:57,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:19:57,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 19:19:57,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:19:57,104 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 84 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:19:57,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1620474793] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:19:57,104 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:19:57,104 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-12 19:19:57,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027357766] [2021-06-12 19:19:57,104 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 19:19:57,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:19:57,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 19:19:57,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:19:57,105 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) [2021-06-12 19:19:57,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:19:57,589 INFO L93 Difference]: Finished difference Result 8662 states and 21553 transitions. [2021-06-12 19:19:57,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:19:57,590 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 [2021-06-12 19:19:57,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:19:57,601 INFO L225 Difference]: With dead ends: 8662 [2021-06-12 19:19:57,601 INFO L226 Difference]: Without dead ends: 8608 [2021-06-12 19:19:57,601 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 162.6ms TimeCoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:19:57,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8608 states. [2021-06-12 19:19:57,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8608 to 6632. [2021-06-12 19:19:57,687 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) [2021-06-12 19:19:57,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6632 states to 6632 states and 17410 transitions. [2021-06-12 19:19:57,698 INFO L78 Accepts]: Start accepts. Automaton has 6632 states and 17410 transitions. Word has length 47 [2021-06-12 19:19:57,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:19:57,698 INFO L482 AbstractCegarLoop]: Abstraction has 6632 states and 17410 transitions. [2021-06-12 19:19:57,698 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) [2021-06-12 19:19:57,698 INFO L276 IsEmpty]: Start isEmpty. Operand 6632 states and 17410 transitions. [2021-06-12 19:19:57,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-12 19:19:57,703 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:19:57,703 INFO L472 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:19:57,904 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable399 [2021-06-12 19:19:57,904 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:19:57,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:19:57,904 INFO L82 PathProgramCache]: Analyzing trace with hash 1457344172, now seen corresponding path program 47 times [2021-06-12 19:19:57,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:19:57,904 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909413725] [2021-06-12 19:19:57,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:19:57,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:19:57,956 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 73 proven. 24 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:19:57,956 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:19:57,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909413725] [2021-06-12 19:19:57,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [909413725] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:19:57,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514072494] [2021-06-12 19:19:57,956 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 [2021-06-12 19:19:58,033 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-06-12 19:19:58,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:19:58,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 19:19:58,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:19:58,162 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 75 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:19:58,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [514072494] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:19:58,162 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:19:58,162 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 15] total 17 [2021-06-12 19:19:58,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546792887] [2021-06-12 19:19:58,163 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:19:58,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:19:58,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:19:58,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=192, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:19:58,163 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) [2021-06-12 19:19:58,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:19:58,520 INFO L93 Difference]: Finished difference Result 10971 states and 26933 transitions. [2021-06-12 19:19:58,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 19:19:58,520 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 [2021-06-12 19:19:58,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:19:58,533 INFO L225 Difference]: With dead ends: 10971 [2021-06-12 19:19:58,534 INFO L226 Difference]: Without dead ends: 10971 [2021-06-12 19:19:58,534 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 179.5ms TimeCoverageRelationStatistics Valid=221, Invalid=331, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:19:58,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10971 states. [2021-06-12 19:19:58,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10971 to 6822. [2021-06-12 19:19:58,646 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) [2021-06-12 19:19:58,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6822 states to 6822 states and 17990 transitions. [2021-06-12 19:19:58,657 INFO L78 Accepts]: Start accepts. Automaton has 6822 states and 17990 transitions. Word has length 47 [2021-06-12 19:19:58,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:19:58,657 INFO L482 AbstractCegarLoop]: Abstraction has 6822 states and 17990 transitions. [2021-06-12 19:19:58,657 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) [2021-06-12 19:19:58,657 INFO L276 IsEmpty]: Start isEmpty. Operand 6822 states and 17990 transitions. [2021-06-12 19:19:58,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-12 19:19:58,662 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:19:58,662 INFO L472 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:19:58,863 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable400,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:19:58,863 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:19:58,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:19:58,863 INFO L82 PathProgramCache]: Analyzing trace with hash -180228284, now seen corresponding path program 48 times [2021-06-12 19:19:58,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:19:58,863 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700879474] [2021-06-12 19:19:58,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:19:58,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:19:58,923 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 71 proven. 26 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:19:58,923 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:19:58,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700879474] [2021-06-12 19:19:58,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700879474] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:19:58,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417483540] [2021-06-12 19:19:58,923 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 [2021-06-12 19:19:58,951 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-06-12 19:19:58,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:19:58,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 19:19:58,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:19:59,026 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 72 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:19:59,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1417483540] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:19:59,026 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:19:59,026 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 11 [2021-06-12 19:19:59,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553914725] [2021-06-12 19:19:59,026 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 19:19:59,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:19:59,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 19:19:59,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:19:59,027 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) [2021-06-12 19:19:59,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:19:59,247 INFO L93 Difference]: Finished difference Result 10273 states and 25277 transitions. [2021-06-12 19:19:59,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:19:59,247 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 [2021-06-12 19:19:59,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:19:59,259 INFO L225 Difference]: With dead ends: 10273 [2021-06-12 19:19:59,259 INFO L226 Difference]: Without dead ends: 10273 [2021-06-12 19:19:59,260 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 94.8ms TimeCoverageRelationStatistics Valid=109, Invalid=163, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:19:59,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10273 states. [2021-06-12 19:19:59,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10273 to 6822. [2021-06-12 19:19:59,378 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) [2021-06-12 19:19:59,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6822 states to 6822 states and 17984 transitions. [2021-06-12 19:19:59,393 INFO L78 Accepts]: Start accepts. Automaton has 6822 states and 17984 transitions. Word has length 47 [2021-06-12 19:19:59,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:19:59,393 INFO L482 AbstractCegarLoop]: Abstraction has 6822 states and 17984 transitions. [2021-06-12 19:19:59,394 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) [2021-06-12 19:19:59,394 INFO L276 IsEmpty]: Start isEmpty. Operand 6822 states and 17984 transitions. [2021-06-12 19:19:59,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-12 19:19:59,400 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:19:59,400 INFO L472 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:19:59,601 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable401,206 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:19:59,601 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:19:59,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:19:59,601 INFO L82 PathProgramCache]: Analyzing trace with hash -1870223448, now seen corresponding path program 49 times [2021-06-12 19:19:59,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:19:59,601 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615219506] [2021-06-12 19:19:59,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:19:59,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:19:59,676 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 61 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:19:59,677 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:19:59,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615219506] [2021-06-12 19:19:59,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615219506] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:19:59,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545754489] [2021-06-12 19:19:59,677 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 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 [2021-06-12 19:19:59,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:19:59,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 19:19:59,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:19:59,775 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 62 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:19:59,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1545754489] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:19:59,776 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:19:59,776 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 12 [2021-06-12 19:19:59,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887181778] [2021-06-12 19:19:59,776 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:19:59,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:19:59,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:19:59,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:19:59,776 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) [2021-06-12 19:20:00,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:20:00,025 INFO L93 Difference]: Finished difference Result 8962 states and 22325 transitions. [2021-06-12 19:20:00,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:20:00,026 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 [2021-06-12 19:20:00,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:20:00,034 INFO L225 Difference]: With dead ends: 8962 [2021-06-12 19:20:00,035 INFO L226 Difference]: Without dead ends: 8962 [2021-06-12 19:20:00,035 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 108.7ms TimeCoverageRelationStatistics Valid=116, Invalid=190, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:20:00,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8962 states. [2021-06-12 19:20:00,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8962 to 6635. [2021-06-12 19:20:00,123 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) [2021-06-12 19:20:00,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6635 states to 6635 states and 17481 transitions. [2021-06-12 19:20:00,134 INFO L78 Accepts]: Start accepts. Automaton has 6635 states and 17481 transitions. Word has length 47 [2021-06-12 19:20:00,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:20:00,135 INFO L482 AbstractCegarLoop]: Abstraction has 6635 states and 17481 transitions. [2021-06-12 19:20:00,135 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) [2021-06-12 19:20:00,135 INFO L276 IsEmpty]: Start isEmpty. Operand 6635 states and 17481 transitions. [2021-06-12 19:20:00,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-12 19:20:00,140 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:00,140 INFO L472 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:00,340 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable402 [2021-06-12 19:20:00,340 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:00,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:00,341 INFO L82 PathProgramCache]: Analyzing trace with hash -1591078520, now seen corresponding path program 108 times [2021-06-12 19:20:00,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:00,341 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186118712] [2021-06-12 19:20:00,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:00,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:00,409 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 37 proven. 61 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:20:00,409 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:00,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186118712] [2021-06-12 19:20:00,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186118712] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:00,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664835363] [2021-06-12 19:20:00,409 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 [2021-06-12 19:20:00,436 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-12 19:20:00,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:20:00,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 19:20:00,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:20:00,512 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 37 proven. 61 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:20:00,512 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [664835363] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:00,513 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:20:00,513 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-12 19:20:00,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871266597] [2021-06-12 19:20:00,513 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 19:20:00,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:00,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 19:20:00,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:20:00,513 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) [2021-06-12 19:20:00,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:20:00,705 INFO L93 Difference]: Finished difference Result 7750 states and 19446 transitions. [2021-06-12 19:20:00,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:20:00,705 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 [2021-06-12 19:20:00,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:20:00,712 INFO L225 Difference]: With dead ends: 7750 [2021-06-12 19:20:00,713 INFO L226 Difference]: Without dead ends: 7723 [2021-06-12 19:20:00,713 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 90.4ms TimeCoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:20:00,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7723 states. [2021-06-12 19:20:00,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7723 to 6635. [2021-06-12 19:20:00,811 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) [2021-06-12 19:20:00,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6635 states to 6635 states and 17475 transitions. [2021-06-12 19:20:00,821 INFO L78 Accepts]: Start accepts. Automaton has 6635 states and 17475 transitions. Word has length 47 [2021-06-12 19:20:00,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:20:00,821 INFO L482 AbstractCegarLoop]: Abstraction has 6635 states and 17475 transitions. [2021-06-12 19:20:00,821 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) [2021-06-12 19:20:00,821 INFO L276 IsEmpty]: Start isEmpty. Operand 6635 states and 17475 transitions. [2021-06-12 19:20:00,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-12 19:20:00,826 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:00,826 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:01,027 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable403,208 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:20:01,027 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:01,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:01,027 INFO L82 PathProgramCache]: Analyzing trace with hash 890204437, now seen corresponding path program 50 times [2021-06-12 19:20:01,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:01,027 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902999555] [2021-06-12 19:20:01,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:01,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:01,097 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 7 proven. 87 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:20:01,097 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:01,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902999555] [2021-06-12 19:20:01,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902999555] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:01,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394315154] [2021-06-12 19:20:01,097 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 [2021-06-12 19:20:01,122 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:20:01,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:20:01,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 19:20:01,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:20:01,202 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 88 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:20:01,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1394315154] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:01,203 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:20:01,203 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-12 19:20:01,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363158881] [2021-06-12 19:20:01,203 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 19:20:01,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:01,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 19:20:01,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:20:01,203 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) [2021-06-12 19:20:01,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:20:01,557 INFO L93 Difference]: Finished difference Result 7795 states and 19769 transitions. [2021-06-12 19:20:01,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:20:01,558 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 [2021-06-12 19:20:01,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:20:01,567 INFO L225 Difference]: With dead ends: 7795 [2021-06-12 19:20:01,567 INFO L226 Difference]: Without dead ends: 7771 [2021-06-12 19:20:01,567 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 114.2ms TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:20:01,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7771 states. [2021-06-12 19:20:01,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7771 to 6763. [2021-06-12 19:20:01,662 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) [2021-06-12 19:20:01,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6763 states to 6763 states and 17786 transitions. [2021-06-12 19:20:01,674 INFO L78 Accepts]: Start accepts. Automaton has 6763 states and 17786 transitions. Word has length 47 [2021-06-12 19:20:01,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:20:01,674 INFO L482 AbstractCegarLoop]: Abstraction has 6763 states and 17786 transitions. [2021-06-12 19:20:01,674 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) [2021-06-12 19:20:01,674 INFO L276 IsEmpty]: Start isEmpty. Operand 6763 states and 17786 transitions. [2021-06-12 19:20:01,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-12 19:20:01,680 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:01,680 INFO L472 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:01,880 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable408 [2021-06-12 19:20:01,880 INFO L430 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:01,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:01,881 INFO L82 PathProgramCache]: Analyzing trace with hash -663492420, now seen corresponding path program 109 times [2021-06-12 19:20:01,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:01,881 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576141554] [2021-06-12 19:20:01,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:01,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:01,932 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 37 proven. 57 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-12 19:20:01,932 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:01,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576141554] [2021-06-12 19:20:01,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576141554] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:01,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93448856] [2021-06-12 19:20:01,933 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 [2021-06-12 19:20:01,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:01,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 19:20:01,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:20:02,050 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 37 proven. 57 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-12 19:20:02,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [93448856] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:02,051 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:20:02,051 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-06-12 19:20:02,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38537901] [2021-06-12 19:20:02,051 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 19:20:02,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:02,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 19:20:02,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-06-12 19:20:02,051 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) [2021-06-12 19:20:02,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:20:02,202 INFO L93 Difference]: Finished difference Result 8122 states and 20221 transitions. [2021-06-12 19:20:02,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:20:02,203 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 [2021-06-12 19:20:02,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:20:02,214 INFO L225 Difference]: With dead ends: 8122 [2021-06-12 19:20:02,214 INFO L226 Difference]: Without dead ends: 8119 [2021-06-12 19:20:02,215 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 47.4ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:20:02,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8119 states. [2021-06-12 19:20:02,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8119 to 6755. [2021-06-12 19:20:02,325 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) [2021-06-12 19:20:02,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6755 states to 6755 states and 17752 transitions. [2021-06-12 19:20:02,339 INFO L78 Accepts]: Start accepts. Automaton has 6755 states and 17752 transitions. Word has length 47 [2021-06-12 19:20:02,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:20:02,339 INFO L482 AbstractCegarLoop]: Abstraction has 6755 states and 17752 transitions. [2021-06-12 19:20:02,340 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) [2021-06-12 19:20:02,340 INFO L276 IsEmpty]: Start isEmpty. Operand 6755 states and 17752 transitions. [2021-06-12 19:20:02,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-12 19:20:02,346 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:02,346 INFO L472 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:02,560 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable409,210 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:20:02,560 INFO L430 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:02,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:02,560 INFO L82 PathProgramCache]: Analyzing trace with hash -456429854, now seen corresponding path program 110 times [2021-06-12 19:20:02,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:02,560 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532190350] [2021-06-12 19:20:02,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:02,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:02,620 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 32 proven. 62 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-12 19:20:02,621 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:02,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532190350] [2021-06-12 19:20:02,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532190350] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:02,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620146167] [2021-06-12 19:20:02,621 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 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 [2021-06-12 19:20:02,653 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:20:02,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:20:02,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 19:20:02,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:20:02,731 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 32 proven. 62 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-12 19:20:02,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [620146167] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:02,732 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:20:02,732 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-12 19:20:02,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467585604] [2021-06-12 19:20:02,732 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 19:20:02,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:02,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 19:20:02,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:20:02,733 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) [2021-06-12 19:20:02,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:20:02,905 INFO L93 Difference]: Finished difference Result 8150 states and 20236 transitions. [2021-06-12 19:20:02,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:20:02,905 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 [2021-06-12 19:20:02,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:20:02,914 INFO L225 Difference]: With dead ends: 8150 [2021-06-12 19:20:02,914 INFO L226 Difference]: Without dead ends: 8132 [2021-06-12 19:20:02,914 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 69.4ms TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:20:02,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8132 states. [2021-06-12 19:20:02,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8132 to 6755. [2021-06-12 19:20:02,989 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) [2021-06-12 19:20:02,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6755 states to 6755 states and 17732 transitions. [2021-06-12 19:20:02,998 INFO L78 Accepts]: Start accepts. Automaton has 6755 states and 17732 transitions. Word has length 47 [2021-06-12 19:20:02,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:20:02,998 INFO L482 AbstractCegarLoop]: Abstraction has 6755 states and 17732 transitions. [2021-06-12 19:20:02,998 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) [2021-06-12 19:20:02,998 INFO L276 IsEmpty]: Start isEmpty. Operand 6755 states and 17732 transitions. [2021-06-12 19:20:03,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-12 19:20:03,002 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:03,002 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:03,203 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 211 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable411 [2021-06-12 19:20:03,203 INFO L430 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:03,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:03,203 INFO L82 PathProgramCache]: Analyzing trace with hash -1904429867, now seen corresponding path program 111 times [2021-06-12 19:20:03,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:03,203 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628126948] [2021-06-12 19:20:03,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:03,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:03,270 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 16 proven. 78 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:20:03,270 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:03,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628126948] [2021-06-12 19:20:03,270 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628126948] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:03,270 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966746898] [2021-06-12 19:20:03,270 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 [2021-06-12 19:20:03,299 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-06-12 19:20:03,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:20:03,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 19:20:03,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:20:03,383 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 11 proven. 83 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:20:03,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [966746898] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:03,383 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:20:03,383 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-06-12 19:20:03,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868018532] [2021-06-12 19:20:03,384 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 19:20:03,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:03,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 19:20:03,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:20:03,384 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) [2021-06-12 19:20:03,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:20:03,850 INFO L93 Difference]: Finished difference Result 7412 states and 18888 transitions. [2021-06-12 19:20:03,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:20:03,850 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 [2021-06-12 19:20:03,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:20:03,857 INFO L225 Difference]: With dead ends: 7412 [2021-06-12 19:20:03,857 INFO L226 Difference]: Without dead ends: 7338 [2021-06-12 19:20:03,858 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 104.2ms TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:20:03,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7338 states. [2021-06-12 19:20:03,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7338 to 6729. [2021-06-12 19:20:03,950 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) [2021-06-12 19:20:03,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6729 states to 6729 states and 17635 transitions. [2021-06-12 19:20:03,960 INFO L78 Accepts]: Start accepts. Automaton has 6729 states and 17635 transitions. Word has length 47 [2021-06-12 19:20:03,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:20:03,960 INFO L482 AbstractCegarLoop]: Abstraction has 6729 states and 17635 transitions. [2021-06-12 19:20:03,960 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) [2021-06-12 19:20:03,960 INFO L276 IsEmpty]: Start isEmpty. Operand 6729 states and 17635 transitions. [2021-06-12 19:20:03,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-12 19:20:03,965 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:03,965 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:04,165 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable414 [2021-06-12 19:20:04,166 INFO L430 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:04,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:04,166 INFO L82 PathProgramCache]: Analyzing trace with hash 1777001249, now seen corresponding path program 112 times [2021-06-12 19:20:04,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:04,166 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577635609] [2021-06-12 19:20:04,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:04,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:04,237 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 13 proven. 79 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-12 19:20:04,237 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:04,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577635609] [2021-06-12 19:20:04,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577635609] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:04,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183728250] [2021-06-12 19:20:04,237 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 [2021-06-12 19:20:04,262 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:20:04,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:20:04,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 19:20:04,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:20:04,330 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 80 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-12 19:20:04,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1183728250] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:04,330 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:20:04,330 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-12 19:20:04,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302619355] [2021-06-12 19:20:04,331 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 19:20:04,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:04,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 19:20:04,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:20:04,331 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) [2021-06-12 19:20:04,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:20:04,681 INFO L93 Difference]: Finished difference Result 7761 states and 19651 transitions. [2021-06-12 19:20:04,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:20:04,682 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 [2021-06-12 19:20:04,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:20:04,690 INFO L225 Difference]: With dead ends: 7761 [2021-06-12 19:20:04,691 INFO L226 Difference]: Without dead ends: 7749 [2021-06-12 19:20:04,691 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 105.5ms TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:20:04,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7749 states. [2021-06-12 19:20:04,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7749 to 6765. [2021-06-12 19:20:04,772 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) [2021-06-12 19:20:04,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6765 states to 6765 states and 17720 transitions. [2021-06-12 19:20:04,783 INFO L78 Accepts]: Start accepts. Automaton has 6765 states and 17720 transitions. Word has length 47 [2021-06-12 19:20:04,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:20:04,783 INFO L482 AbstractCegarLoop]: Abstraction has 6765 states and 17720 transitions. [2021-06-12 19:20:04,783 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) [2021-06-12 19:20:04,783 INFO L276 IsEmpty]: Start isEmpty. Operand 6765 states and 17720 transitions. [2021-06-12 19:20:04,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-12 19:20:04,788 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:04,788 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:04,988 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable415,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:20:04,988 INFO L430 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:04,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:04,989 INFO L82 PathProgramCache]: Analyzing trace with hash -376048713, now seen corresponding path program 113 times [2021-06-12 19:20:04,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:04,989 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125450277] [2021-06-12 19:20:04,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:04,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:05,057 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 13 proven. 81 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:20:05,057 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:05,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125450277] [2021-06-12 19:20:05,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125450277] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:05,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415229798] [2021-06-12 19:20:05,058 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 [2021-06-12 19:20:05,086 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-06-12 19:20:05,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:20:05,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 19:20:05,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:20:05,154 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 82 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:20:05,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [415229798] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:05,155 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:20:05,155 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-12 19:20:05,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191812054] [2021-06-12 19:20:05,155 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:20:05,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:05,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:20:05,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:20:05,155 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) [2021-06-12 19:20:05,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:20:05,610 INFO L93 Difference]: Finished difference Result 8961 states and 22249 transitions. [2021-06-12 19:20:05,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 19:20:05,611 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 [2021-06-12 19:20:05,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:20:05,620 INFO L225 Difference]: With dead ends: 8961 [2021-06-12 19:20:05,620 INFO L226 Difference]: Without dead ends: 8907 [2021-06-12 19:20:05,621 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 164.2ms TimeCoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:20:05,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8907 states. [2021-06-12 19:20:05,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8907 to 6885. [2021-06-12 19:20:05,706 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) [2021-06-12 19:20:05,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6885 states to 6885 states and 18035 transitions. [2021-06-12 19:20:05,716 INFO L78 Accepts]: Start accepts. Automaton has 6885 states and 18035 transitions. Word has length 47 [2021-06-12 19:20:05,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:20:05,716 INFO L482 AbstractCegarLoop]: Abstraction has 6885 states and 18035 transitions. [2021-06-12 19:20:05,716 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) [2021-06-12 19:20:05,716 INFO L276 IsEmpty]: Start isEmpty. Operand 6885 states and 18035 transitions. [2021-06-12 19:20:05,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-12 19:20:05,721 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:05,721 INFO L472 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:05,921 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable416,214 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:20:05,921 INFO L430 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:05,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:05,922 INFO L82 PathProgramCache]: Analyzing trace with hash 1156510396, now seen corresponding path program 114 times [2021-06-12 19:20:05,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:05,922 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251190986] [2021-06-12 19:20:05,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:05,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:05,978 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 27 proven. 70 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:20:05,979 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:05,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251190986] [2021-06-12 19:20:05,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251190986] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:05,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443691359] [2021-06-12 19:20:05,979 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 [2021-06-12 19:20:06,006 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-06-12 19:20:06,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:20:06,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 19:20:06,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:20:06,073 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 27 proven. 70 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:20:06,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1443691359] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:06,073 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:20:06,073 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-12 19:20:06,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157099432] [2021-06-12 19:20:06,074 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:20:06,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:06,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:20:06,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:20:06,074 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) [2021-06-12 19:20:06,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:20:06,259 INFO L93 Difference]: Finished difference Result 8306 states and 20557 transitions. [2021-06-12 19:20:06,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:20:06,259 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 [2021-06-12 19:20:06,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:20:06,268 INFO L225 Difference]: With dead ends: 8306 [2021-06-12 19:20:06,269 INFO L226 Difference]: Without dead ends: 8282 [2021-06-12 19:20:06,269 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 70.3ms TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:20:06,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8282 states. [2021-06-12 19:20:06,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8282 to 6885. [2021-06-12 19:20:06,346 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) [2021-06-12 19:20:06,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6885 states to 6885 states and 18021 transitions. [2021-06-12 19:20:06,357 INFO L78 Accepts]: Start accepts. Automaton has 6885 states and 18021 transitions. Word has length 47 [2021-06-12 19:20:06,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:20:06,357 INFO L482 AbstractCegarLoop]: Abstraction has 6885 states and 18021 transitions. [2021-06-12 19:20:06,357 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) [2021-06-12 19:20:06,357 INFO L276 IsEmpty]: Start isEmpty. Operand 6885 states and 18021 transitions. [2021-06-12 19:20:06,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-12 19:20:06,362 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:06,362 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:06,562 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable417,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:20:06,563 INFO L430 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:06,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:06,563 INFO L82 PathProgramCache]: Analyzing trace with hash -221212179, now seen corresponding path program 115 times [2021-06-12 19:20:06,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:06,563 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522408618] [2021-06-12 19:20:06,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:06,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:06,642 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 13 proven. 81 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:20:06,642 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:06,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522408618] [2021-06-12 19:20:06,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522408618] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:06,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789648695] [2021-06-12 19:20:06,642 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 [2021-06-12 19:20:06,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:06,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 19:20:06,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:20:06,737 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 82 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:20:06,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [789648695] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:06,737 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:20:06,737 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-12 19:20:06,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560214592] [2021-06-12 19:20:06,738 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 19:20:06,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:06,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 19:20:06,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:20:06,738 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) [2021-06-12 19:20:07,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:20:07,376 INFO L93 Difference]: Finished difference Result 10707 states and 26088 transitions. [2021-06-12 19:20:07,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-12 19:20:07,376 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 [2021-06-12 19:20:07,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:20:07,389 INFO L225 Difference]: With dead ends: 10707 [2021-06-12 19:20:07,390 INFO L226 Difference]: Without dead ends: 10593 [2021-06-12 19:20:07,390 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 284.0ms TimeCoverageRelationStatistics Valid=171, Invalid=1019, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 19:20:07,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10593 states. [2021-06-12 19:20:07,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10593 to 7009. [2021-06-12 19:20:07,488 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) [2021-06-12 19:20:07,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7009 states to 7009 states and 18346 transitions. [2021-06-12 19:20:07,498 INFO L78 Accepts]: Start accepts. Automaton has 7009 states and 18346 transitions. Word has length 47 [2021-06-12 19:20:07,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:20:07,498 INFO L482 AbstractCegarLoop]: Abstraction has 7009 states and 18346 transitions. [2021-06-12 19:20:07,498 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) [2021-06-12 19:20:07,498 INFO L276 IsEmpty]: Start isEmpty. Operand 7009 states and 18346 transitions. [2021-06-12 19:20:07,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-12 19:20:07,503 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:07,503 INFO L472 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:07,703 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable421 [2021-06-12 19:20:07,704 INFO L430 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:07,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:07,704 INFO L82 PathProgramCache]: Analyzing trace with hash 165390498, now seen corresponding path program 116 times [2021-06-12 19:20:07,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:07,704 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481725290] [2021-06-12 19:20:07,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:07,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:07,773 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 28 proven. 69 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:20:07,773 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:07,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481725290] [2021-06-12 19:20:07,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481725290] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:07,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759016422] [2021-06-12 19:20:07,773 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 [2021-06-12 19:20:07,798 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:20:07,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:20:07,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 19:20:07,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:20:07,867 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 28 proven. 69 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:20:07,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [759016422] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:07,867 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:20:07,867 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-12 19:20:07,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110386468] [2021-06-12 19:20:07,867 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 19:20:07,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:07,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 19:20:07,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:20:07,868 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) [2021-06-12 19:20:08,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:20:08,063 INFO L93 Difference]: Finished difference Result 8467 states and 20934 transitions. [2021-06-12 19:20:08,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:20:08,063 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 [2021-06-12 19:20:08,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:20:08,071 INFO L225 Difference]: With dead ends: 8467 [2021-06-12 19:20:08,071 INFO L226 Difference]: Without dead ends: 8434 [2021-06-12 19:20:08,071 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 90.3ms TimeCoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:20:08,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8434 states. [2021-06-12 19:20:08,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8434 to 6781. [2021-06-12 19:20:08,143 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) [2021-06-12 19:20:08,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6781 states to 6781 states and 17678 transitions. [2021-06-12 19:20:08,152 INFO L78 Accepts]: Start accepts. Automaton has 6781 states and 17678 transitions. Word has length 47 [2021-06-12 19:20:08,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:20:08,152 INFO L482 AbstractCegarLoop]: Abstraction has 6781 states and 17678 transitions. [2021-06-12 19:20:08,152 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) [2021-06-12 19:20:08,152 INFO L276 IsEmpty]: Start isEmpty. Operand 6781 states and 17678 transitions. [2021-06-12 19:20:08,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-12 19:20:08,156 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:08,156 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:08,356 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable422 [2021-06-12 19:20:08,357 INFO L430 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:08,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:08,357 INFO L82 PathProgramCache]: Analyzing trace with hash -280903689, now seen corresponding path program 117 times [2021-06-12 19:20:08,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:08,357 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049988664] [2021-06-12 19:20:08,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:08,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:08,445 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 84 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:20:08,445 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:08,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049988664] [2021-06-12 19:20:08,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049988664] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:08,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121805239] [2021-06-12 19:20:08,445 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 [2021-06-12 19:20:08,533 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-06-12 19:20:08,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:20:08,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 19:20:08,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:20:08,603 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 84 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:20:08,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [121805239] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:08,604 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:20:08,604 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-12 19:20:08,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423960968] [2021-06-12 19:20:08,604 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:20:08,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:08,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:20:08,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:20:08,604 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) [2021-06-12 19:20:09,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:20:09,117 INFO L93 Difference]: Finished difference Result 9528 states and 23213 transitions. [2021-06-12 19:20:09,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 19:20:09,118 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 [2021-06-12 19:20:09,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:20:09,128 INFO L225 Difference]: With dead ends: 9528 [2021-06-12 19:20:09,128 INFO L226 Difference]: Without dead ends: 9372 [2021-06-12 19:20:09,128 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 202.0ms TimeCoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:20:09,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9372 states. [2021-06-12 19:20:09,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9372 to 6516. [2021-06-12 19:20:09,226 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) [2021-06-12 19:20:09,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6516 states to 6516 states and 16949 transitions. [2021-06-12 19:20:09,236 INFO L78 Accepts]: Start accepts. Automaton has 6516 states and 16949 transitions. Word has length 47 [2021-06-12 19:20:09,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:20:09,237 INFO L482 AbstractCegarLoop]: Abstraction has 6516 states and 16949 transitions. [2021-06-12 19:20:09,237 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) [2021-06-12 19:20:09,237 INFO L276 IsEmpty]: Start isEmpty. Operand 6516 states and 16949 transitions. [2021-06-12 19:20:09,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-12 19:20:09,242 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:09,242 INFO L472 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:09,442 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable427,218 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:20:09,443 INFO L430 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:09,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:09,443 INFO L82 PathProgramCache]: Analyzing trace with hash -518965206, now seen corresponding path program 51 times [2021-06-12 19:20:09,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:09,443 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464504491] [2021-06-12 19:20:09,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:09,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:09,494 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 77 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:20:09,494 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:09,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464504491] [2021-06-12 19:20:09,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464504491] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:09,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975070516] [2021-06-12 19:20:09,494 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 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 [2021-06-12 19:20:09,522 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-06-12 19:20:09,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:20:09,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 19:20:09,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:20:09,598 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 78 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:09,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1975070516] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:09,598 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:20:09,598 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 10 [2021-06-12 19:20:09,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247307313] [2021-06-12 19:20:09,599 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:20:09,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:09,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:20:09,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:20:09,599 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) [2021-06-12 19:20:09,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:20:09,779 INFO L93 Difference]: Finished difference Result 8372 states and 20874 transitions. [2021-06-12 19:20:09,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:20:09,779 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 [2021-06-12 19:20:09,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:20:09,787 INFO L225 Difference]: With dead ends: 8372 [2021-06-12 19:20:09,788 INFO L226 Difference]: Without dead ends: 8356 [2021-06-12 19:20:09,788 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 59.4ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:20:09,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8356 states. [2021-06-12 19:20:09,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8356 to 6760. [2021-06-12 19:20:09,898 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) [2021-06-12 19:20:09,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6760 states to 6760 states and 17612 transitions. [2021-06-12 19:20:09,907 INFO L78 Accepts]: Start accepts. Automaton has 6760 states and 17612 transitions. Word has length 47 [2021-06-12 19:20:09,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:20:09,907 INFO L482 AbstractCegarLoop]: Abstraction has 6760 states and 17612 transitions. [2021-06-12 19:20:09,907 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) [2021-06-12 19:20:09,907 INFO L276 IsEmpty]: Start isEmpty. Operand 6760 states and 17612 transitions. [2021-06-12 19:20:09,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-12 19:20:09,912 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:09,912 INFO L472 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:10,112 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable428 [2021-06-12 19:20:10,112 INFO L430 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:10,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:10,113 INFO L82 PathProgramCache]: Analyzing trace with hash -1140845616, now seen corresponding path program 52 times [2021-06-12 19:20:10,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:10,113 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912729119] [2021-06-12 19:20:10,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:10,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:10,166 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 77 proven. 20 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:20:10,166 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:10,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912729119] [2021-06-12 19:20:10,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912729119] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:10,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312694755] [2021-06-12 19:20:10,166 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 [2021-06-12 19:20:10,190 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:20:10,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:20:10,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 19:20:10,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:20:10,262 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 78 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:20:10,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312694755] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:10,263 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:20:10,263 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 10 [2021-06-12 19:20:10,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446552171] [2021-06-12 19:20:10,263 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:20:10,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:10,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:20:10,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:20:10,263 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) [2021-06-12 19:20:10,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:20:10,477 INFO L93 Difference]: Finished difference Result 10200 states and 25050 transitions. [2021-06-12 19:20:10,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:20:10,478 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 [2021-06-12 19:20:10,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:20:10,489 INFO L225 Difference]: With dead ends: 10200 [2021-06-12 19:20:10,489 INFO L226 Difference]: Without dead ends: 10200 [2021-06-12 19:20:10,489 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 77.3ms TimeCoverageRelationStatistics Valid=89, Invalid=121, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:20:10,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10200 states. [2021-06-12 19:20:10,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10200 to 6771. [2021-06-12 19:20:10,583 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) [2021-06-12 19:20:10,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6771 states to 6771 states and 17645 transitions. [2021-06-12 19:20:10,594 INFO L78 Accepts]: Start accepts. Automaton has 6771 states and 17645 transitions. Word has length 47 [2021-06-12 19:20:10,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:20:10,594 INFO L482 AbstractCegarLoop]: Abstraction has 6771 states and 17645 transitions. [2021-06-12 19:20:10,594 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) [2021-06-12 19:20:10,594 INFO L276 IsEmpty]: Start isEmpty. Operand 6771 states and 17645 transitions. [2021-06-12 19:20:10,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-12 19:20:10,599 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:10,599 INFO L472 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:10,799 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable430 [2021-06-12 19:20:10,799 INFO L430 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:10,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:10,800 INFO L82 PathProgramCache]: Analyzing trace with hash 1516549224, now seen corresponding path program 53 times [2021-06-12 19:20:10,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:10,800 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170600566] [2021-06-12 19:20:10,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:10,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:10,858 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 76 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:20:10,858 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:10,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170600566] [2021-06-12 19:20:10,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170600566] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:10,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017331746] [2021-06-12 19:20:10,859 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-12 19:20:10,886 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-06-12 19:20:10,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:20:10,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 19:20:10,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:20:11,041 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 78 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:11,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1017331746] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:11,041 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:20:11,041 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 16] total 19 [2021-06-12 19:20:11,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362583437] [2021-06-12 19:20:11,042 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 19:20:11,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:11,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 19:20:11,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=254, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:20:11,042 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) [2021-06-12 19:20:11,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:20:11,528 INFO L93 Difference]: Finished difference Result 11339 states and 27631 transitions. [2021-06-12 19:20:11,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 19:20:11,528 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 [2021-06-12 19:20:11,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:20:11,540 INFO L225 Difference]: With dead ends: 11339 [2021-06-12 19:20:11,540 INFO L226 Difference]: Without dead ends: 11339 [2021-06-12 19:20:11,541 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 295.2ms TimeCoverageRelationStatistics Valid=369, Invalid=623, Unknown=0, NotChecked=0, Total=992 [2021-06-12 19:20:11,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11339 states. [2021-06-12 19:20:11,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11339 to 6800. [2021-06-12 19:20:11,639 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) [2021-06-12 19:20:11,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6800 states to 6800 states and 17737 transitions. [2021-06-12 19:20:11,648 INFO L78 Accepts]: Start accepts. Automaton has 6800 states and 17737 transitions. Word has length 47 [2021-06-12 19:20:11,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:20:11,648 INFO L482 AbstractCegarLoop]: Abstraction has 6800 states and 17737 transitions. [2021-06-12 19:20:11,648 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) [2021-06-12 19:20:11,648 INFO L276 IsEmpty]: Start isEmpty. Operand 6800 states and 17737 transitions. [2021-06-12 19:20:11,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-12 19:20:11,653 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:11,653 INFO L472 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:11,853 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable431,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:20:11,853 INFO L430 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:11,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:11,854 INFO L82 PathProgramCache]: Analyzing trace with hash -173445940, now seen corresponding path program 54 times [2021-06-12 19:20:11,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:11,854 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711207031] [2021-06-12 19:20:11,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:11,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:11,935 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 69 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:20:11,935 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:11,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711207031] [2021-06-12 19:20:11,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711207031] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:11,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247010185] [2021-06-12 19:20:11,935 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 [2021-06-12 19:20:11,963 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-06-12 19:20:11,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:20:11,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 19:20:11,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:20:12,037 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 70 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:20:12,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [247010185] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:12,038 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:20:12,038 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 12 [2021-06-12 19:20:12,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008370435] [2021-06-12 19:20:12,038 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:20:12,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:12,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:20:12,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:20:12,038 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) [2021-06-12 19:20:12,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:20:12,325 INFO L93 Difference]: Finished difference Result 10003 states and 24584 transitions. [2021-06-12 19:20:12,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 19:20:12,325 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 [2021-06-12 19:20:12,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:20:12,335 INFO L225 Difference]: With dead ends: 10003 [2021-06-12 19:20:12,335 INFO L226 Difference]: Without dead ends: 10003 [2021-06-12 19:20:12,335 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 137.3ms TimeCoverageRelationStatistics Valid=163, Invalid=257, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:20:12,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10003 states. [2021-06-12 19:20:12,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10003 to 6809. [2021-06-12 19:20:12,427 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) [2021-06-12 19:20:12,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6809 states to 6809 states and 17759 transitions. [2021-06-12 19:20:12,438 INFO L78 Accepts]: Start accepts. Automaton has 6809 states and 17759 transitions. Word has length 47 [2021-06-12 19:20:12,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:20:12,438 INFO L482 AbstractCegarLoop]: Abstraction has 6809 states and 17759 transitions. [2021-06-12 19:20:12,438 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) [2021-06-12 19:20:12,439 INFO L276 IsEmpty]: Start isEmpty. Operand 6809 states and 17759 transitions. [2021-06-12 19:20:12,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-12 19:20:12,444 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:12,444 INFO L472 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:12,644 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable432 [2021-06-12 19:20:12,644 INFO L430 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:12,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:12,644 INFO L82 PathProgramCache]: Analyzing trace with hash -1212732952, now seen corresponding path program 55 times [2021-06-12 19:20:12,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:12,645 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033751139] [2021-06-12 19:20:12,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:12,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:12,725 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 62 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:20:12,725 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:12,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033751139] [2021-06-12 19:20:12,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033751139] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:12,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603991498] [2021-06-12 19:20:12,726 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 [2021-06-12 19:20:12,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:12,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 19:20:12,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:20:12,826 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 63 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:12,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [603991498] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:12,827 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:20:12,827 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 13 [2021-06-12 19:20:12,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216953001] [2021-06-12 19:20:12,827 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:20:12,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:12,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:20:12,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:20:12,827 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) [2021-06-12 19:20:13,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:20:13,145 INFO L93 Difference]: Finished difference Result 8634 states and 21474 transitions. [2021-06-12 19:20:13,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:20:13,145 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 [2021-06-12 19:20:13,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:20:13,155 INFO L225 Difference]: With dead ends: 8634 [2021-06-12 19:20:13,155 INFO L226 Difference]: Without dead ends: 8634 [2021-06-12 19:20:13,155 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 138.9ms TimeCoverageRelationStatistics Valid=155, Invalid=265, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:20:13,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8634 states. [2021-06-12 19:20:13,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8634 to 6442. [2021-06-12 19:20:13,237 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) [2021-06-12 19:20:13,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6442 states to 6442 states and 16765 transitions. [2021-06-12 19:20:13,247 INFO L78 Accepts]: Start accepts. Automaton has 6442 states and 16765 transitions. Word has length 47 [2021-06-12 19:20:13,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:20:13,247 INFO L482 AbstractCegarLoop]: Abstraction has 6442 states and 16765 transitions. [2021-06-12 19:20:13,247 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) [2021-06-12 19:20:13,247 INFO L276 IsEmpty]: Start isEmpty. Operand 6442 states and 16765 transitions. [2021-06-12 19:20:13,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-12 19:20:13,252 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:13,252 INFO L472 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:13,452 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 223 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable433 [2021-06-12 19:20:13,452 INFO L430 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:13,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:13,452 INFO L82 PathProgramCache]: Analyzing trace with hash 1612669180, now seen corresponding path program 118 times [2021-06-12 19:20:13,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:13,453 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872130596] [2021-06-12 19:20:13,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:13,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:13,528 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:20:13,528 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:13,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872130596] [2021-06-12 19:20:13,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872130596] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:13,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703831207] [2021-06-12 19:20:13,529 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 [2021-06-12 19:20:13,553 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:20:13,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:20:13,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 19:20:13,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:20:13,628 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:20:13,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [703831207] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:13,628 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:20:13,628 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-06-12 19:20:13,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461292255] [2021-06-12 19:20:13,628 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:20:13,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:13,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:20:13,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:20:13,629 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) [2021-06-12 19:20:13,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:20:13,846 INFO L93 Difference]: Finished difference Result 7636 states and 18887 transitions. [2021-06-12 19:20:13,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:20:13,846 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 [2021-06-12 19:20:13,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:20:13,853 INFO L225 Difference]: With dead ends: 7636 [2021-06-12 19:20:13,853 INFO L226 Difference]: Without dead ends: 7600 [2021-06-12 19:20:13,853 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 108.8ms TimeCoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:20:13,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7600 states. [2021-06-12 19:20:13,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7600 to 6442. [2021-06-12 19:20:13,922 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) [2021-06-12 19:20:13,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6442 states to 6442 states and 16759 transitions. [2021-06-12 19:20:13,931 INFO L78 Accepts]: Start accepts. Automaton has 6442 states and 16759 transitions. Word has length 47 [2021-06-12 19:20:13,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:20:13,931 INFO L482 AbstractCegarLoop]: Abstraction has 6442 states and 16759 transitions. [2021-06-12 19:20:13,931 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) [2021-06-12 19:20:13,931 INFO L276 IsEmpty]: Start isEmpty. Operand 6442 states and 16759 transitions. [2021-06-12 19:20:13,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-12 19:20:13,935 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:13,935 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:14,136 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable434 [2021-06-12 19:20:14,136 INFO L430 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:14,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:14,136 INFO L82 PathProgramCache]: Analyzing trace with hash -2022814789, now seen corresponding path program 56 times [2021-06-12 19:20:14,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:14,136 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489983121] [2021-06-12 19:20:14,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:14,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:14,206 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 7 proven. 87 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:20:14,206 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:14,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489983121] [2021-06-12 19:20:14,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489983121] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:14,206 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565736715] [2021-06-12 19:20:14,206 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 [2021-06-12 19:20:14,232 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:20:14,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:20:14,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 19:20:14,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:20:14,300 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 88 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:20:14,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1565736715] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:14,301 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:20:14,301 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-12 19:20:14,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056923015] [2021-06-12 19:20:14,301 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 19:20:14,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:14,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 19:20:14,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:20:14,301 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) [2021-06-12 19:20:14,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:20:14,640 INFO L93 Difference]: Finished difference Result 7550 states and 18942 transitions. [2021-06-12 19:20:14,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:20:14,640 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 [2021-06-12 19:20:14,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:20:14,649 INFO L225 Difference]: With dead ends: 7550 [2021-06-12 19:20:14,649 INFO L226 Difference]: Without dead ends: 7535 [2021-06-12 19:20:14,650 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 104.3ms TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:20:14,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7535 states. [2021-06-12 19:20:14,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7535 to 6598. [2021-06-12 19:20:14,729 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) [2021-06-12 19:20:14,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6598 states to 6598 states and 17133 transitions. [2021-06-12 19:20:14,739 INFO L78 Accepts]: Start accepts. Automaton has 6598 states and 17133 transitions. Word has length 47 [2021-06-12 19:20:14,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:20:14,740 INFO L482 AbstractCegarLoop]: Abstraction has 6598 states and 17133 transitions. [2021-06-12 19:20:14,740 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) [2021-06-12 19:20:14,740 INFO L276 IsEmpty]: Start isEmpty. Operand 6598 states and 17133 transitions. [2021-06-12 19:20:14,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-12 19:20:14,744 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:14,745 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:14,945 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable440,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:20:14,945 INFO L430 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:14,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:14,945 INFO L82 PathProgramCache]: Analyzing trace with hash -522481797, now seen corresponding path program 119 times [2021-06-12 19:20:14,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:14,945 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249072855] [2021-06-12 19:20:14,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:14,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:15,010 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 16 proven. 78 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:20:15,010 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:15,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249072855] [2021-06-12 19:20:15,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249072855] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:15,010 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140700546] [2021-06-12 19:20:15,010 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 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 [2021-06-12 19:20:15,038 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-06-12 19:20:15,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:20:15,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 19:20:15,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:20:15,117 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 11 proven. 83 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:20:15,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [140700546] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:15,118 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:20:15,118 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-06-12 19:20:15,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957659544] [2021-06-12 19:20:15,118 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 19:20:15,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:15,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 19:20:15,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:20:15,118 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) [2021-06-12 19:20:15,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:20:15,554 INFO L93 Difference]: Finished difference Result 7269 states and 18302 transitions. [2021-06-12 19:20:15,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:20:15,554 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 [2021-06-12 19:20:15,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:20:15,561 INFO L225 Difference]: With dead ends: 7269 [2021-06-12 19:20:15,561 INFO L226 Difference]: Without dead ends: 7177 [2021-06-12 19:20:15,561 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 103.3ms TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:20:15,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7177 states. [2021-06-12 19:20:15,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7177 to 6587. [2021-06-12 19:20:15,627 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) [2021-06-12 19:20:15,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6587 states to 6587 states and 17051 transitions. [2021-06-12 19:20:15,635 INFO L78 Accepts]: Start accepts. Automaton has 6587 states and 17051 transitions. Word has length 47 [2021-06-12 19:20:15,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:20:15,636 INFO L482 AbstractCegarLoop]: Abstraction has 6587 states and 17051 transitions. [2021-06-12 19:20:15,636 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) [2021-06-12 19:20:15,636 INFO L276 IsEmpty]: Start isEmpty. Operand 6587 states and 17051 transitions. [2021-06-12 19:20:15,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-12 19:20:15,640 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:15,640 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:15,840 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable441 [2021-06-12 19:20:15,840 INFO L430 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:15,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:15,841 INFO L82 PathProgramCache]: Analyzing trace with hash -1136017977, now seen corresponding path program 120 times [2021-06-12 19:20:15,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:15,841 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279231977] [2021-06-12 19:20:15,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:15,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:15,911 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 13 proven. 79 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-12 19:20:15,911 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:15,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279231977] [2021-06-12 19:20:15,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279231977] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:15,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322329237] [2021-06-12 19:20:15,911 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 [2021-06-12 19:20:15,939 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-06-12 19:20:15,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:20:15,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 19:20:15,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:20:16,048 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 80 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-12 19:20:16,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [322329237] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:16,048 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:20:16,048 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-12 19:20:16,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461664936] [2021-06-12 19:20:16,048 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 19:20:16,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:16,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 19:20:16,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:20:16,049 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) [2021-06-12 19:20:16,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:20:16,384 INFO L93 Difference]: Finished difference Result 7638 states and 19101 transitions. [2021-06-12 19:20:16,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:20:16,384 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 [2021-06-12 19:20:16,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:20:16,393 INFO L225 Difference]: With dead ends: 7638 [2021-06-12 19:20:16,393 INFO L226 Difference]: Without dead ends: 7626 [2021-06-12 19:20:16,393 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 104.3ms TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:20:16,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7626 states. [2021-06-12 19:20:16,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7626 to 6635. [2021-06-12 19:20:16,470 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) [2021-06-12 19:20:16,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6635 states to 6635 states and 17170 transitions. [2021-06-12 19:20:16,480 INFO L78 Accepts]: Start accepts. Automaton has 6635 states and 17170 transitions. Word has length 47 [2021-06-12 19:20:16,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:20:16,481 INFO L482 AbstractCegarLoop]: Abstraction has 6635 states and 17170 transitions. [2021-06-12 19:20:16,481 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) [2021-06-12 19:20:16,481 INFO L276 IsEmpty]: Start isEmpty. Operand 6635 states and 17170 transitions. [2021-06-12 19:20:16,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-12 19:20:16,486 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:16,486 INFO L472 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:16,686 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 227 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable442 [2021-06-12 19:20:16,686 INFO L430 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:16,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:16,686 INFO L82 PathProgramCache]: Analyzing trace with hash -1293317464, now seen corresponding path program 57 times [2021-06-12 19:20:16,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:16,686 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754240915] [2021-06-12 19:20:16,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:16,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:16,737 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 60 proven. 37 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:20:16,737 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:16,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754240915] [2021-06-12 19:20:16,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754240915] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:16,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859109246] [2021-06-12 19:20:16,738 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 [2021-06-12 19:20:16,767 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-06-12 19:20:16,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:20:16,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 19:20:16,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:20:16,835 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 62 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:16,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [859109246] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:16,835 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:20:16,835 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 10 [2021-06-12 19:20:16,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030092974] [2021-06-12 19:20:16,835 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:20:16,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:16,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:20:16,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:20:16,836 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) [2021-06-12 19:20:17,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:20:17,022 INFO L93 Difference]: Finished difference Result 7955 states and 19893 transitions. [2021-06-12 19:20:17,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:20:17,022 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 [2021-06-12 19:20:17,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:20:17,032 INFO L225 Difference]: With dead ends: 7955 [2021-06-12 19:20:17,032 INFO L226 Difference]: Without dead ends: 7935 [2021-06-12 19:20:17,033 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 67.8ms TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:20:17,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7935 states. [2021-06-12 19:20:17,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7935 to 6729. [2021-06-12 19:20:17,121 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) [2021-06-12 19:20:17,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6729 states to 6729 states and 17365 transitions. [2021-06-12 19:20:17,132 INFO L78 Accepts]: Start accepts. Automaton has 6729 states and 17365 transitions. Word has length 47 [2021-06-12 19:20:17,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:20:17,132 INFO L482 AbstractCegarLoop]: Abstraction has 6729 states and 17365 transitions. [2021-06-12 19:20:17,132 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) [2021-06-12 19:20:17,132 INFO L276 IsEmpty]: Start isEmpty. Operand 6729 states and 17365 transitions. [2021-06-12 19:20:17,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-12 19:20:17,137 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:17,137 INFO L472 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:17,337 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 228 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable443 [2021-06-12 19:20:17,337 INFO L430 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:17,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:17,338 INFO L82 PathProgramCache]: Analyzing trace with hash 1510591816, now seen corresponding path program 121 times [2021-06-12 19:20:17,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:17,338 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24245741] [2021-06-12 19:20:17,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:17,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:17,405 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 31 proven. 65 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:20:17,405 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:17,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24245741] [2021-06-12 19:20:17,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24245741] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:17,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615844550] [2021-06-12 19:20:17,405 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 [2021-06-12 19:20:17,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:17,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 19:20:17,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:20:17,495 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 31 proven. 65 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:20:17,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1615844550] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:17,495 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:20:17,495 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-12 19:20:17,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54201516] [2021-06-12 19:20:17,495 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 19:20:17,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:17,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 19:20:17,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:20:17,496 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) [2021-06-12 19:20:17,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:20:17,646 INFO L93 Difference]: Finished difference Result 8206 states and 20010 transitions. [2021-06-12 19:20:17,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:20:17,646 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 [2021-06-12 19:20:17,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:20:17,654 INFO L225 Difference]: With dead ends: 8206 [2021-06-12 19:20:17,654 INFO L226 Difference]: Without dead ends: 8188 [2021-06-12 19:20:17,654 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 65.2ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:20:17,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8188 states. [2021-06-12 19:20:17,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8188 to 6724. [2021-06-12 19:20:17,726 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) [2021-06-12 19:20:17,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6724 states to 6724 states and 17339 transitions. [2021-06-12 19:20:17,735 INFO L78 Accepts]: Start accepts. Automaton has 6724 states and 17339 transitions. Word has length 47 [2021-06-12 19:20:17,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:20:17,735 INFO L482 AbstractCegarLoop]: Abstraction has 6724 states and 17339 transitions. [2021-06-12 19:20:17,735 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) [2021-06-12 19:20:17,735 INFO L276 IsEmpty]: Start isEmpty. Operand 6724 states and 17339 transitions. [2021-06-12 19:20:17,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-12 19:20:17,740 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:17,740 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:17,944 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable446 [2021-06-12 19:20:17,945 INFO L430 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:17,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:17,945 INFO L82 PathProgramCache]: Analyzing trace with hash 1005899357, now seen corresponding path program 122 times [2021-06-12 19:20:17,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:17,945 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394490750] [2021-06-12 19:20:17,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:17,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:18,015 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 13 proven. 81 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:20:18,016 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:18,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394490750] [2021-06-12 19:20:18,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394490750] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:18,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574702476] [2021-06-12 19:20:18,016 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 [2021-06-12 19:20:18,043 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:20:18,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:20:18,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 19:20:18,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:20:18,113 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 82 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:20:18,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1574702476] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:18,113 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:20:18,113 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-12 19:20:18,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343785176] [2021-06-12 19:20:18,113 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:20:18,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:18,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:20:18,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:20:18,114 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) [2021-06-12 19:20:18,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:20:18,601 INFO L93 Difference]: Finished difference Result 8839 states and 21652 transitions. [2021-06-12 19:20:18,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 19:20:18,602 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 [2021-06-12 19:20:18,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:20:18,612 INFO L225 Difference]: With dead ends: 8839 [2021-06-12 19:20:18,612 INFO L226 Difference]: Without dead ends: 8785 [2021-06-12 19:20:18,612 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 183.8ms TimeCoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:20:18,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8785 states. [2021-06-12 19:20:18,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8785 to 6842. [2021-06-12 19:20:18,698 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) [2021-06-12 19:20:18,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6842 states to 6842 states and 17646 transitions. [2021-06-12 19:20:18,709 INFO L78 Accepts]: Start accepts. Automaton has 6842 states and 17646 transitions. Word has length 47 [2021-06-12 19:20:18,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:20:18,710 INFO L482 AbstractCegarLoop]: Abstraction has 6842 states and 17646 transitions. [2021-06-12 19:20:18,710 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) [2021-06-12 19:20:18,710 INFO L276 IsEmpty]: Start isEmpty. Operand 6842 states and 17646 transitions. [2021-06-12 19:20:18,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-12 19:20:18,715 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:18,715 INFO L472 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:18,915 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable449,230 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:20:18,916 INFO L430 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:18,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:18,916 INFO L82 PathProgramCache]: Analyzing trace with hash -1756508830, now seen corresponding path program 123 times [2021-06-12 19:20:18,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:18,916 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985167828] [2021-06-12 19:20:18,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:18,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:19,033 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 28 proven. 69 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:20:19,033 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:19,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985167828] [2021-06-12 19:20:19,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985167828] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:19,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745158178] [2021-06-12 19:20:19,033 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 [2021-06-12 19:20:19,075 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-12 19:20:19,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:20:19,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 19:20:19,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:20:19,146 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 28 proven. 69 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:20:19,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745158178] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:19,146 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:20:19,146 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-12 19:20:19,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015694230] [2021-06-12 19:20:19,146 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:20:19,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:19,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:20:19,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:20:19,146 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) [2021-06-12 19:20:19,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:20:19,300 INFO L93 Difference]: Finished difference Result 8382 states and 20407 transitions. [2021-06-12 19:20:19,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:20:19,300 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 [2021-06-12 19:20:19,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:20:19,308 INFO L225 Difference]: With dead ends: 8382 [2021-06-12 19:20:19,308 INFO L226 Difference]: Without dead ends: 8358 [2021-06-12 19:20:19,309 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 125.5ms TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:20:19,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8358 states. [2021-06-12 19:20:19,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8358 to 6842. [2021-06-12 19:20:19,379 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) [2021-06-12 19:20:19,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6842 states to 6842 states and 17635 transitions. [2021-06-12 19:20:19,392 INFO L78 Accepts]: Start accepts. Automaton has 6842 states and 17635 transitions. Word has length 47 [2021-06-12 19:20:19,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:20:19,392 INFO L482 AbstractCegarLoop]: Abstraction has 6842 states and 17635 transitions. [2021-06-12 19:20:19,392 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) [2021-06-12 19:20:19,392 INFO L276 IsEmpty]: Start isEmpty. Operand 6842 states and 17635 transitions. [2021-06-12 19:20:19,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-12 19:20:19,398 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:19,398 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:19,599 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable450 [2021-06-12 19:20:19,599 INFO L430 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:19,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:19,599 INFO L82 PathProgramCache]: Analyzing trace with hash 1160735891, now seen corresponding path program 124 times [2021-06-12 19:20:19,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:19,600 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507215612] [2021-06-12 19:20:19,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:19,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:19,690 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 13 proven. 81 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:20:19,690 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:19,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507215612] [2021-06-12 19:20:19,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507215612] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:19,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331973237] [2021-06-12 19:20:19,690 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 [2021-06-12 19:20:19,717 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:20:19,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:20:19,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 19:20:19,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:20:19,785 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 82 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:20:19,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331973237] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:19,785 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:20:19,785 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-12 19:20:19,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113914552] [2021-06-12 19:20:19,786 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 19:20:19,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:19,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 19:20:19,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:20:19,786 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) [2021-06-12 19:20:20,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:20:20,506 INFO L93 Difference]: Finished difference Result 11528 states and 27416 transitions. [2021-06-12 19:20:20,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-12 19:20:20,506 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 [2021-06-12 19:20:20,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:20:20,519 INFO L225 Difference]: With dead ends: 11528 [2021-06-12 19:20:20,519 INFO L226 Difference]: Without dead ends: 11348 [2021-06-12 19:20:20,519 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 353.6ms TimeCoverageRelationStatistics Valid=219, Invalid=1421, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 19:20:20,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11348 states. [2021-06-12 19:20:20,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11348 to 7099. [2021-06-12 19:20:20,617 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) [2021-06-12 19:20:20,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7099 states to 7099 states and 18268 transitions. [2021-06-12 19:20:20,628 INFO L78 Accepts]: Start accepts. Automaton has 7099 states and 18268 transitions. Word has length 47 [2021-06-12 19:20:20,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:20:20,628 INFO L482 AbstractCegarLoop]: Abstraction has 7099 states and 18268 transitions. [2021-06-12 19:20:20,628 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) [2021-06-12 19:20:20,628 INFO L276 IsEmpty]: Start isEmpty. Operand 7099 states and 18268 transitions. [2021-06-12 19:20:20,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-12 19:20:20,633 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:20,633 INFO L472 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:20,834 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 232 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable454 [2021-06-12 19:20:20,834 INFO L430 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:20,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:20,834 INFO L82 PathProgramCache]: Analyzing trace with hash 1547338568, now seen corresponding path program 125 times [2021-06-12 19:20:20,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:20,834 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586176248] [2021-06-12 19:20:20,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:20,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:20,903 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 26 proven. 71 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:20:20,903 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:20,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586176248] [2021-06-12 19:20:20,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586176248] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:20,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785860264] [2021-06-12 19:20:20,904 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 [2021-06-12 19:20:20,932 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-06-12 19:20:20,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:20:20,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 19:20:20,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:20:21,020 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 26 proven. 71 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:20:21,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1785860264] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:21,021 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:20:21,021 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 14 [2021-06-12 19:20:21,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966941871] [2021-06-12 19:20:21,021 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:20:21,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:21,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:20:21,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:20:21,021 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) [2021-06-12 19:20:21,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:20:21,236 INFO L93 Difference]: Finished difference Result 8869 states and 21483 transitions. [2021-06-12 19:20:21,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:20:21,236 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 [2021-06-12 19:20:21,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:20:21,245 INFO L225 Difference]: With dead ends: 8869 [2021-06-12 19:20:21,246 INFO L226 Difference]: Without dead ends: 8836 [2021-06-12 19:20:21,246 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 114.3ms TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:20:21,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8836 states. [2021-06-12 19:20:21,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8836 to 7099. [2021-06-12 19:20:21,330 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) [2021-06-12 19:20:21,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7099 states to 7099 states and 18265 transitions. [2021-06-12 19:20:21,340 INFO L78 Accepts]: Start accepts. Automaton has 7099 states and 18265 transitions. Word has length 47 [2021-06-12 19:20:21,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:20:21,340 INFO L482 AbstractCegarLoop]: Abstraction has 7099 states and 18265 transitions. [2021-06-12 19:20:21,340 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) [2021-06-12 19:20:21,340 INFO L276 IsEmpty]: Start isEmpty. Operand 7099 states and 18265 transitions. [2021-06-12 19:20:21,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-12 19:20:21,344 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:21,344 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:21,544 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable455 [2021-06-12 19:20:21,545 INFO L430 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:21,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:21,545 INFO L82 PathProgramCache]: Analyzing trace with hash 1101044381, now seen corresponding path program 126 times [2021-06-12 19:20:21,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:21,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543089405] [2021-06-12 19:20:21,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:21,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:21,630 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 13 proven. 81 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:20:21,631 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:21,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543089405] [2021-06-12 19:20:21,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543089405] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:21,631 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261720191] [2021-06-12 19:20:21,631 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 [2021-06-12 19:20:21,661 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-06-12 19:20:21,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:20:21,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 19:20:21,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:20:21,728 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 82 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:20:21,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261720191] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:21,729 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:20:21,729 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-12 19:20:21,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107749711] [2021-06-12 19:20:21,729 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:20:21,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:21,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:20:21,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:20:21,729 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) [2021-06-12 19:20:22,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:20:22,828 INFO L93 Difference]: Finished difference Result 13900 states and 32512 transitions. [2021-06-12 19:20:22,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-12 19:20:22,829 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 [2021-06-12 19:20:22,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:20:22,845 INFO L225 Difference]: With dead ends: 13900 [2021-06-12 19:20:22,845 INFO L226 Difference]: Without dead ends: 13624 [2021-06-12 19:20:22,845 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1372 ImplicationChecksByTransitivity, 638.9ms TimeCoverageRelationStatistics Valid=489, Invalid=3671, Unknown=0, NotChecked=0, Total=4160 [2021-06-12 19:20:22,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13624 states. [2021-06-12 19:20:22,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13624 to 7315. [2021-06-12 19:20:22,966 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) [2021-06-12 19:20:22,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7315 states to 7315 states and 18787 transitions. [2021-06-12 19:20:22,977 INFO L78 Accepts]: Start accepts. Automaton has 7315 states and 18787 transitions. Word has length 47 [2021-06-12 19:20:22,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:20:22,977 INFO L482 AbstractCegarLoop]: Abstraction has 7315 states and 18787 transitions. [2021-06-12 19:20:22,977 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) [2021-06-12 19:20:22,977 INFO L276 IsEmpty]: Start isEmpty. Operand 7315 states and 18787 transitions. [2021-06-12 19:20:22,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-12 19:20:22,982 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:22,982 INFO L472 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:23,182 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable460,234 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:20:23,183 INFO L430 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:23,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:23,183 INFO L82 PathProgramCache]: Analyzing trace with hash -1300350046, now seen corresponding path program 127 times [2021-06-12 19:20:23,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:23,183 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743263709] [2021-06-12 19:20:23,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:23,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:23,262 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 30 proven. 67 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:20:23,262 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:23,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743263709] [2021-06-12 19:20:23,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743263709] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:23,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659836277] [2021-06-12 19:20:23,262 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 [2021-06-12 19:20:23,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:23,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 19:20:23,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:20:23,359 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 30 proven. 67 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:20:23,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1659836277] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:23,359 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:20:23,359 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-06-12 19:20:23,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505723080] [2021-06-12 19:20:23,360 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:20:23,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:23,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:20:23,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:20:23,360 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) [2021-06-12 19:20:23,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:20:23,594 INFO L93 Difference]: Finished difference Result 9027 states and 21871 transitions. [2021-06-12 19:20:23,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:20:23,595 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 [2021-06-12 19:20:23,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:20:23,602 INFO L225 Difference]: With dead ends: 9027 [2021-06-12 19:20:23,603 INFO L226 Difference]: Without dead ends: 8985 [2021-06-12 19:20:23,603 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 112.7ms TimeCoverageRelationStatistics Valid=102, Invalid=204, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:20:23,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8985 states. [2021-06-12 19:20:23,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8985 to 7097. [2021-06-12 19:20:23,684 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) [2021-06-12 19:20:23,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7097 states to 7097 states and 18161 transitions. [2021-06-12 19:20:23,693 INFO L78 Accepts]: Start accepts. Automaton has 7097 states and 18161 transitions. Word has length 47 [2021-06-12 19:20:23,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:20:23,693 INFO L482 AbstractCegarLoop]: Abstraction has 7097 states and 18161 transitions. [2021-06-12 19:20:23,693 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) [2021-06-12 19:20:23,693 INFO L276 IsEmpty]: Start isEmpty. Operand 7097 states and 18161 transitions. [2021-06-12 19:20:23,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-12 19:20:23,697 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:23,698 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:23,900 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable461,235 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:20:23,901 INFO L430 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:23,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:23,901 INFO L82 PathProgramCache]: Analyzing trace with hash 947730515, now seen corresponding path program 128 times [2021-06-12 19:20:23,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:23,901 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339549554] [2021-06-12 19:20:23,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:23,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:24,002 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 84 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:20:24,003 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:24,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339549554] [2021-06-12 19:20:24,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339549554] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:24,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563384975] [2021-06-12 19:20:24,003 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-12 19:20:24,028 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:20:24,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:20:24,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 19:20:24,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:20:24,095 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 84 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:20:24,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1563384975] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:24,095 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:20:24,095 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-12 19:20:24,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615310172] [2021-06-12 19:20:24,095 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:20:24,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:24,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:20:24,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:20:24,096 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) [2021-06-12 19:20:24,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:20:24,665 INFO L93 Difference]: Finished difference Result 9058 states and 21780 transitions. [2021-06-12 19:20:24,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 19:20:24,665 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 [2021-06-12 19:20:24,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:20:24,673 INFO L225 Difference]: With dead ends: 9058 [2021-06-12 19:20:24,673 INFO L226 Difference]: Without dead ends: 8680 [2021-06-12 19:20:24,673 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 249.9ms TimeCoverageRelationStatistics Valid=132, Invalid=624, Unknown=0, NotChecked=0, Total=756 [2021-06-12 19:20:24,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8680 states. [2021-06-12 19:20:24,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8680 to 6394. [2021-06-12 19:20:24,737 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) [2021-06-12 19:20:24,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6394 states to 6394 states and 16393 transitions. [2021-06-12 19:20:24,745 INFO L78 Accepts]: Start accepts. Automaton has 6394 states and 16393 transitions. Word has length 47 [2021-06-12 19:20:24,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:20:24,746 INFO L482 AbstractCegarLoop]: Abstraction has 6394 states and 16393 transitions. [2021-06-12 19:20:24,746 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) [2021-06-12 19:20:24,746 INFO L276 IsEmpty]: Start isEmpty. Operand 6394 states and 16393 transitions. [2021-06-12 19:20:24,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-12 19:20:24,749 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:24,749 INFO L472 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:24,950 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable467,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:20:24,950 INFO L430 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:24,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:24,950 INFO L82 PathProgramCache]: Analyzing trace with hash 87788588, now seen corresponding path program 58 times [2021-06-12 19:20:24,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:24,950 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577848487] [2021-06-12 19:20:24,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:24,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:25,004 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 75 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:20:25,004 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:25,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577848487] [2021-06-12 19:20:25,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577848487] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:25,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178996044] [2021-06-12 19:20:25,004 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 [2021-06-12 19:20:25,060 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:20:25,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:20:25,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 19:20:25,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:20:25,131 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 76 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:20:25,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1178996044] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:25,131 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:20:25,131 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 10 [2021-06-12 19:20:25,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314946912] [2021-06-12 19:20:25,131 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:20:25,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:25,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:20:25,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:20:25,131 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) [2021-06-12 19:20:25,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:20:25,336 INFO L93 Difference]: Finished difference Result 9182 states and 22469 transitions. [2021-06-12 19:20:25,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:20:25,336 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 [2021-06-12 19:20:25,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:20:25,344 INFO L225 Difference]: With dead ends: 9182 [2021-06-12 19:20:25,344 INFO L226 Difference]: Without dead ends: 9182 [2021-06-12 19:20:25,345 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 86.9ms TimeCoverageRelationStatistics Valid=101, Invalid=139, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:20:25,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9182 states. [2021-06-12 19:20:25,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9182 to 6584. [2021-06-12 19:20:25,416 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) [2021-06-12 19:20:25,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6584 states to 6584 states and 16967 transitions. [2021-06-12 19:20:25,424 INFO L78 Accepts]: Start accepts. Automaton has 6584 states and 16967 transitions. Word has length 47 [2021-06-12 19:20:25,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:20:25,424 INFO L482 AbstractCegarLoop]: Abstraction has 6584 states and 16967 transitions. [2021-06-12 19:20:25,424 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) [2021-06-12 19:20:25,424 INFO L276 IsEmpty]: Start isEmpty. Operand 6584 states and 16967 transitions. [2021-06-12 19:20:25,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-12 19:20:25,428 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:25,428 INFO L472 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:25,628 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable468 [2021-06-12 19:20:25,628 INFO L430 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:25,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:25,628 INFO L82 PathProgramCache]: Analyzing trace with hash -1549783868, now seen corresponding path program 59 times [2021-06-12 19:20:25,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:25,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372364068] [2021-06-12 19:20:25,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:25,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:25,692 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 75 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:20:25,692 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:25,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372364068] [2021-06-12 19:20:25,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372364068] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:25,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951307072] [2021-06-12 19:20:25,692 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 [2021-06-12 19:20:25,721 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-06-12 19:20:25,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:20:25,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 19:20:25,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:20:25,907 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 76 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:20:25,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [951307072] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:25,908 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:20:25,908 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15] total 24 [2021-06-12 19:20:25,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678617913] [2021-06-12 19:20:25,908 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 19:20:25,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:25,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 19:20:25,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=430, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:20:25,908 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) [2021-06-12 19:20:26,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:20:26,656 INFO L93 Difference]: Finished difference Result 10546 states and 25434 transitions. [2021-06-12 19:20:26,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-12 19:20:26,657 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 [2021-06-12 19:20:26,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:20:26,668 INFO L225 Difference]: With dead ends: 10546 [2021-06-12 19:20:26,668 INFO L226 Difference]: Without dead ends: 10546 [2021-06-12 19:20:26,668 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 425.6ms TimeCoverageRelationStatistics Valid=568, Invalid=1154, Unknown=0, NotChecked=0, Total=1722 [2021-06-12 19:20:26,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10546 states. [2021-06-12 19:20:26,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10546 to 6608. [2021-06-12 19:20:26,757 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) [2021-06-12 19:20:26,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6608 states to 6608 states and 17036 transitions. [2021-06-12 19:20:26,766 INFO L78 Accepts]: Start accepts. Automaton has 6608 states and 17036 transitions. Word has length 47 [2021-06-12 19:20:26,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:20:26,766 INFO L482 AbstractCegarLoop]: Abstraction has 6608 states and 17036 transitions. [2021-06-12 19:20:26,766 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) [2021-06-12 19:20:26,766 INFO L276 IsEmpty]: Start isEmpty. Operand 6608 states and 17036 transitions. [2021-06-12 19:20:26,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-12 19:20:26,772 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:26,772 INFO L472 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:26,972 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable469,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:20:26,972 INFO L430 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:26,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:26,972 INFO L82 PathProgramCache]: Analyzing trace with hash 1055188264, now seen corresponding path program 60 times [2021-06-12 19:20:26,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:26,973 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751358278] [2021-06-12 19:20:26,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:26,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:27,044 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 71 proven. 26 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:20:27,045 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:27,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751358278] [2021-06-12 19:20:27,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751358278] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:27,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494595126] [2021-06-12 19:20:27,045 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 [2021-06-12 19:20:27,075 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-06-12 19:20:27,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:20:27,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 19:20:27,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:20:27,149 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 72 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:20:27,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1494595126] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:27,149 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:20:27,149 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 12 [2021-06-12 19:20:27,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580238388] [2021-06-12 19:20:27,149 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:20:27,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:27,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:20:27,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:20:27,149 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) [2021-06-12 19:20:27,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:20:27,474 INFO L93 Difference]: Finished difference Result 9881 states and 24078 transitions. [2021-06-12 19:20:27,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 19:20:27,475 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 [2021-06-12 19:20:27,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:20:27,484 INFO L225 Difference]: With dead ends: 9881 [2021-06-12 19:20:27,485 INFO L226 Difference]: Without dead ends: 9881 [2021-06-12 19:20:27,485 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 164.4ms TimeCoverageRelationStatistics Valid=213, Invalid=339, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:20:27,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9881 states. [2021-06-12 19:20:27,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9881 to 6643. [2021-06-12 19:20:27,576 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) [2021-06-12 19:20:27,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6643 states to 6643 states and 17138 transitions. [2021-06-12 19:20:27,587 INFO L78 Accepts]: Start accepts. Automaton has 6643 states and 17138 transitions. Word has length 47 [2021-06-12 19:20:27,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:20:27,587 INFO L482 AbstractCegarLoop]: Abstraction has 6643 states and 17138 transitions. [2021-06-12 19:20:27,587 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) [2021-06-12 19:20:27,587 INFO L276 IsEmpty]: Start isEmpty. Operand 6643 states and 17138 transitions. [2021-06-12 19:20:27,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-12 19:20:27,592 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:27,592 INFO L472 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:27,792 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable470,239 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:20:27,793 INFO L430 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:27,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:27,793 INFO L82 PathProgramCache]: Analyzing trace with hash 15901252, now seen corresponding path program 61 times [2021-06-12 19:20:27,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:27,793 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861406921] [2021-06-12 19:20:27,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:27,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:27,878 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 67 proven. 30 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:20:27,878 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:27,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861406921] [2021-06-12 19:20:27,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861406921] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:27,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579089119] [2021-06-12 19:20:27,878 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 [2021-06-12 19:20:27,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:27,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 19:20:27,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:20:28,065 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 68 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:20:28,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [579089119] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:28,066 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:20:28,066 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 13 [2021-06-12 19:20:28,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576623236] [2021-06-12 19:20:28,066 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:20:28,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:28,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:20:28,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:20:28,066 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) [2021-06-12 19:20:28,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:20:28,423 INFO L93 Difference]: Finished difference Result 9085 states and 22271 transitions. [2021-06-12 19:20:28,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 19:20:28,423 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 [2021-06-12 19:20:28,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:20:28,434 INFO L225 Difference]: With dead ends: 9085 [2021-06-12 19:20:28,434 INFO L226 Difference]: Without dead ends: 9085 [2021-06-12 19:20:28,435 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 183.3ms TimeCoverageRelationStatistics Valid=227, Invalid=373, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:20:28,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9085 states. [2021-06-12 19:20:28,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9085 to 6641. [2021-06-12 19:20:28,528 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) [2021-06-12 19:20:28,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6641 states to 6641 states and 17133 transitions. [2021-06-12 19:20:28,539 INFO L78 Accepts]: Start accepts. Automaton has 6641 states and 17133 transitions. Word has length 47 [2021-06-12 19:20:28,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:20:28,539 INFO L482 AbstractCegarLoop]: Abstraction has 6641 states and 17133 transitions. [2021-06-12 19:20:28,539 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) [2021-06-12 19:20:28,539 INFO L276 IsEmpty]: Start isEmpty. Operand 6641 states and 17133 transitions. [2021-06-12 19:20:28,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-12 19:20:28,544 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:28,544 INFO L472 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:28,744 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable471,240 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:20:28,744 INFO L430 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:28,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:28,745 INFO L82 PathProgramCache]: Analyzing trace with hash 1035763624, now seen corresponding path program 62 times [2021-06-12 19:20:28,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:28,745 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068129000] [2021-06-12 19:20:28,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:28,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:28,844 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 63 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:20:28,844 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:28,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068129000] [2021-06-12 19:20:28,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068129000] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:28,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964395170] [2021-06-12 19:20:28,844 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 [2021-06-12 19:20:28,871 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:20:28,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:20:28,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 19:20:28,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:20:28,947 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 64 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:28,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1964395170] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:28,947 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:20:28,947 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 14 [2021-06-12 19:20:28,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229903096] [2021-06-12 19:20:28,947 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:20:28,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:28,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:20:28,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:20:28,948 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) [2021-06-12 19:20:29,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:20:29,357 INFO L93 Difference]: Finished difference Result 7979 states and 19784 transitions. [2021-06-12 19:20:29,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:20:29,358 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 [2021-06-12 19:20:29,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:20:29,366 INFO L225 Difference]: With dead ends: 7979 [2021-06-12 19:20:29,366 INFO L226 Difference]: Without dead ends: 7979 [2021-06-12 19:20:29,367 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 183.6ms TimeCoverageRelationStatistics Valid=199, Invalid=353, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:20:29,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7979 states. [2021-06-12 19:20:29,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7979 to 6178. [2021-06-12 19:20:29,441 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) [2021-06-12 19:20:29,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6178 states to 6178 states and 15943 transitions. [2021-06-12 19:20:29,450 INFO L78 Accepts]: Start accepts. Automaton has 6178 states and 15943 transitions. Word has length 47 [2021-06-12 19:20:29,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:20:29,450 INFO L482 AbstractCegarLoop]: Abstraction has 6178 states and 15943 transitions. [2021-06-12 19:20:29,450 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) [2021-06-12 19:20:29,450 INFO L276 IsEmpty]: Start isEmpty. Operand 6178 states and 15943 transitions. [2021-06-12 19:20:29,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-12 19:20:29,454 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:29,455 INFO L472 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:29,655 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable472,241 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:20:29,655 INFO L430 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:29,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:29,655 INFO L82 PathProgramCache]: Analyzing trace with hash 1697148168, now seen corresponding path program 129 times [2021-06-12 19:20:29,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:29,655 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575620425] [2021-06-12 19:20:29,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:29,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:29,745 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 41 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:20:29,746 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:29,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575620425] [2021-06-12 19:20:29,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575620425] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:29,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883275693] [2021-06-12 19:20:29,746 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 [2021-06-12 19:20:29,775 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-12 19:20:29,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:20:29,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 19:20:29,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:20:29,855 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 41 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:20:29,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [883275693] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:29,855 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:20:29,855 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-06-12 19:20:29,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787680820] [2021-06-12 19:20:29,856 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:20:29,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:29,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:20:29,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:20:29,856 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) [2021-06-12 19:20:30,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:20:30,087 INFO L93 Difference]: Finished difference Result 7415 states and 18154 transitions. [2021-06-12 19:20:30,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:20:30,087 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 [2021-06-12 19:20:30,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:20:30,095 INFO L225 Difference]: With dead ends: 7415 [2021-06-12 19:20:30,096 INFO L226 Difference]: Without dead ends: 7370 [2021-06-12 19:20:30,096 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 133.6ms TimeCoverageRelationStatistics Valid=123, Invalid=257, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:20:30,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7370 states. [2021-06-12 19:20:30,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7370 to 6187. [2021-06-12 19:20:30,169 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) [2021-06-12 19:20:30,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6187 states to 6187 states and 15958 transitions. [2021-06-12 19:20:30,179 INFO L78 Accepts]: Start accepts. Automaton has 6187 states and 15958 transitions. Word has length 47 [2021-06-12 19:20:30,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:20:30,179 INFO L482 AbstractCegarLoop]: Abstraction has 6187 states and 15958 transitions. [2021-06-12 19:20:30,179 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) [2021-06-12 19:20:30,179 INFO L276 IsEmpty]: Start isEmpty. Operand 6187 states and 15958 transitions. [2021-06-12 19:20:30,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-12 19:20:30,183 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:30,183 INFO L472 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:30,384 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable473,242 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:20:30,385 INFO L430 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:30,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:30,385 INFO L82 PathProgramCache]: Analyzing trace with hash -686375646, now seen corresponding path program 130 times [2021-06-12 19:20:30,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:30,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974526844] [2021-06-12 19:20:30,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:30,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:30,481 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 49 proven. 48 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:20:30,481 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:30,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974526844] [2021-06-12 19:20:30,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974526844] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:30,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800186727] [2021-06-12 19:20:30,481 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 [2021-06-12 19:20:30,507 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:20:30,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:20:30,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 19:20:30,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:20:30,579 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 49 proven. 48 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:20:30,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800186727] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:30,580 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:20:30,580 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-06-12 19:20:30,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128192687] [2021-06-12 19:20:30,580 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:20:30,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:30,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:20:30,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:20:30,580 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) [2021-06-12 19:20:30,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:20:30,909 INFO L93 Difference]: Finished difference Result 7945 states and 19639 transitions. [2021-06-12 19:20:30,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:20:30,909 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 [2021-06-12 19:20:30,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:20:30,919 INFO L225 Difference]: With dead ends: 7945 [2021-06-12 19:20:30,920 INFO L226 Difference]: Without dead ends: 7945 [2021-06-12 19:20:30,920 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 171.9ms TimeCoverageRelationStatistics Valid=182, Invalid=324, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:20:30,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7945 states. [2021-06-12 19:20:31,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7945 to 6576. [2021-06-12 19:20:31,025 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) [2021-06-12 19:20:31,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6576 states to 6576 states and 17142 transitions. [2021-06-12 19:20:31,036 INFO L78 Accepts]: Start accepts. Automaton has 6576 states and 17142 transitions. Word has length 47 [2021-06-12 19:20:31,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:20:31,036 INFO L482 AbstractCegarLoop]: Abstraction has 6576 states and 17142 transitions. [2021-06-12 19:20:31,036 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) [2021-06-12 19:20:31,036 INFO L276 IsEmpty]: Start isEmpty. Operand 6576 states and 17142 transitions. [2021-06-12 19:20:31,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-12 19:20:31,041 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:31,041 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:31,241 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable480 [2021-06-12 19:20:31,241 INFO L430 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:31,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:31,242 INFO L82 PathProgramCache]: Analyzing trace with hash 1627893973, now seen corresponding path program 63 times [2021-06-12 19:20:31,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:31,242 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350118275] [2021-06-12 19:20:31,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:31,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:31,339 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 89 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:20:31,339 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:31,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350118275] [2021-06-12 19:20:31,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350118275] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:31,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515481626] [2021-06-12 19:20:31,339 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 [2021-06-12 19:20:31,368 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-12 19:20:31,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:20:31,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 19:20:31,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:20:31,437 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 89 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:20:31,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [515481626] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:31,438 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:20:31,438 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-12 19:20:31,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403983381] [2021-06-12 19:20:31,438 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:20:31,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:31,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:20:31,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:20:31,438 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) [2021-06-12 19:20:31,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:20:31,909 INFO L93 Difference]: Finished difference Result 9298 states and 22741 transitions. [2021-06-12 19:20:31,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 19:20:31,910 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 [2021-06-12 19:20:31,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:20:31,920 INFO L225 Difference]: With dead ends: 9298 [2021-06-12 19:20:31,920 INFO L226 Difference]: Without dead ends: 9166 [2021-06-12 19:20:31,920 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 246.9ms TimeCoverageRelationStatistics Valid=132, Invalid=624, Unknown=0, NotChecked=0, Total=756 [2021-06-12 19:20:31,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9166 states. [2021-06-12 19:20:32,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9166 to 6568. [2021-06-12 19:20:32,009 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) [2021-06-12 19:20:32,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6568 states to 6568 states and 17125 transitions. [2021-06-12 19:20:32,020 INFO L78 Accepts]: Start accepts. Automaton has 6568 states and 17125 transitions. Word has length 47 [2021-06-12 19:20:32,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:20:32,020 INFO L482 AbstractCegarLoop]: Abstraction has 6568 states and 17125 transitions. [2021-06-12 19:20:32,020 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) [2021-06-12 19:20:32,020 INFO L276 IsEmpty]: Start isEmpty. Operand 6568 states and 17125 transitions. [2021-06-12 19:20:32,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-12 19:20:32,025 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:32,025 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:32,225 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable481,244 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:20:32,225 INFO L430 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:32,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:32,225 INFO L82 PathProgramCache]: Analyzing trace with hash 1148331157, now seen corresponding path program 131 times [2021-06-12 19:20:32,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:32,226 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790377026] [2021-06-12 19:20:32,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:32,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:32,336 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 14 proven. 81 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:20:32,336 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:32,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790377026] [2021-06-12 19:20:32,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790377026] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:32,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316750241] [2021-06-12 19:20:32,336 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 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 [2021-06-12 19:20:32,365 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-12 19:20:32,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:20:32,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 19:20:32,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:20:32,547 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 11 proven. 84 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:20:32,547 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1316750241] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:32,547 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:20:32,547 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-06-12 19:20:32,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556405573] [2021-06-12 19:20:32,547 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:20:32,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:32,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:20:32,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:20:32,548 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) [2021-06-12 19:20:33,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:20:33,145 INFO L93 Difference]: Finished difference Result 6738 states and 17392 transitions. [2021-06-12 19:20:33,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:20:33,145 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 [2021-06-12 19:20:33,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:20:33,152 INFO L225 Difference]: With dead ends: 6738 [2021-06-12 19:20:33,152 INFO L226 Difference]: Without dead ends: 6682 [2021-06-12 19:20:33,152 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 188.1ms TimeCoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:20:33,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6682 states. [2021-06-12 19:20:33,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6682 to 6568. [2021-06-12 19:20:33,221 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) [2021-06-12 19:20:33,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6568 states to 6568 states and 17104 transitions. [2021-06-12 19:20:33,231 INFO L78 Accepts]: Start accepts. Automaton has 6568 states and 17104 transitions. Word has length 47 [2021-06-12 19:20:33,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:20:33,231 INFO L482 AbstractCegarLoop]: Abstraction has 6568 states and 17104 transitions. [2021-06-12 19:20:33,231 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) [2021-06-12 19:20:33,231 INFO L276 IsEmpty]: Start isEmpty. Operand 6568 states and 17104 transitions. [2021-06-12 19:20:33,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-12 19:20:33,235 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:33,235 INFO L472 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:33,435 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable482 [2021-06-12 19:20:33,436 INFO L430 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:33,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:33,436 INFO L82 PathProgramCache]: Analyzing trace with hash -759601188, now seen corresponding path program 64 times [2021-06-12 19:20:33,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:33,436 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110827604] [2021-06-12 19:20:33,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:33,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:33,525 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 35 proven. 61 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:20:33,525 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:33,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110827604] [2021-06-12 19:20:33,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110827604] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:33,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838894037] [2021-06-12 19:20:33,525 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-12 19:20:33,554 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:20:33,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:20:33,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 19:20:33,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:20:33,628 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 36 proven. 61 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:20:33,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [838894037] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:33,628 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:20:33,628 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 13 [2021-06-12 19:20:33,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230479528] [2021-06-12 19:20:33,628 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:20:33,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:33,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:20:33,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:20:33,628 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) [2021-06-12 19:20:33,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:20:33,862 INFO L93 Difference]: Finished difference Result 8053 states and 20088 transitions. [2021-06-12 19:20:33,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:20:33,862 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 [2021-06-12 19:20:33,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:20:33,870 INFO L225 Difference]: With dead ends: 8053 [2021-06-12 19:20:33,870 INFO L226 Difference]: Without dead ends: 7951 [2021-06-12 19:20:33,870 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 119.9ms TimeCoverageRelationStatistics Valid=109, Invalid=233, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:20:33,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7951 states. [2021-06-12 19:20:33,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7951 to 6416. [2021-06-12 19:20:33,942 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) [2021-06-12 19:20:33,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6416 states to 6416 states and 16733 transitions. [2021-06-12 19:20:33,950 INFO L78 Accepts]: Start accepts. Automaton has 6416 states and 16733 transitions. Word has length 47 [2021-06-12 19:20:33,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:20:33,950 INFO L482 AbstractCegarLoop]: Abstraction has 6416 states and 16733 transitions. [2021-06-12 19:20:33,950 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) [2021-06-12 19:20:33,950 INFO L276 IsEmpty]: Start isEmpty. Operand 6416 states and 16733 transitions. [2021-06-12 19:20:33,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-12 19:20:33,953 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:33,953 INFO L472 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:34,153 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable483,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:20:34,154 INFO L430 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:34,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:34,154 INFO L82 PathProgramCache]: Analyzing trace with hash 372425610, now seen corresponding path program 132 times [2021-06-12 19:20:34,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:34,154 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118647513] [2021-06-12 19:20:34,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:34,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:34,235 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 47 proven. 50 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:20:34,235 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:34,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118647513] [2021-06-12 19:20:34,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118647513] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:34,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814102057] [2021-06-12 19:20:34,235 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 [2021-06-12 19:20:34,264 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-06-12 19:20:34,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:20:34,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-12 19:20:34,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:20:34,415 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 80 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:20:34,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1814102057] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:34,415 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:20:34,415 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-12 19:20:34,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521345835] [2021-06-12 19:20:34,415 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:20:34,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:34,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:20:34,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:20:34,416 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) [2021-06-12 19:20:34,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:20:34,728 INFO L93 Difference]: Finished difference Result 8176 states and 20353 transitions. [2021-06-12 19:20:34,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:20:34,729 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 [2021-06-12 19:20:34,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:20:34,738 INFO L225 Difference]: With dead ends: 8176 [2021-06-12 19:20:34,739 INFO L226 Difference]: Without dead ends: 8176 [2021-06-12 19:20:34,739 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 186.8ms TimeCoverageRelationStatistics Valid=203, Invalid=349, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:20:34,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8176 states. [2021-06-12 19:20:34,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8176 to 6714. [2021-06-12 19:20:34,820 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) [2021-06-12 19:20:34,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6714 states to 6714 states and 17639 transitions. [2021-06-12 19:20:34,830 INFO L78 Accepts]: Start accepts. Automaton has 6714 states and 17639 transitions. Word has length 47 [2021-06-12 19:20:34,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:20:34,830 INFO L482 AbstractCegarLoop]: Abstraction has 6714 states and 17639 transitions. [2021-06-12 19:20:34,830 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) [2021-06-12 19:20:34,830 INFO L276 IsEmpty]: Start isEmpty. Operand 6714 states and 17639 transitions. [2021-06-12 19:20:34,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-12 19:20:34,835 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:34,836 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:35,036 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 247 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable489 [2021-06-12 19:20:35,037 INFO L430 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:35,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:35,037 INFO L82 PathProgramCache]: Analyzing trace with hash 1064796407, now seen corresponding path program 65 times [2021-06-12 19:20:35,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:35,037 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947678883] [2021-06-12 19:20:35,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:35,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:35,124 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 89 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:20:35,125 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:35,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947678883] [2021-06-12 19:20:35,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947678883] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:35,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633360327] [2021-06-12 19:20:35,125 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 [2021-06-12 19:20:35,155 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-12 19:20:35,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:20:35,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 19:20:35,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:20:35,222 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 89 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:20:35,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1633360327] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:35,222 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:20:35,222 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-12 19:20:35,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071853048] [2021-06-12 19:20:35,222 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:20:35,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:35,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:20:35,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:20:35,223 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) [2021-06-12 19:20:35,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:20:35,648 INFO L93 Difference]: Finished difference Result 8947 states and 22376 transitions. [2021-06-12 19:20:35,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 19:20:35,650 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 [2021-06-12 19:20:35,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:20:35,659 INFO L225 Difference]: With dead ends: 8947 [2021-06-12 19:20:35,659 INFO L226 Difference]: Without dead ends: 8933 [2021-06-12 19:20:35,660 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 199.8ms TimeCoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:20:35,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8933 states. [2021-06-12 19:20:35,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8933 to 6712. [2021-06-12 19:20:35,749 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) [2021-06-12 19:20:35,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6712 states to 6712 states and 17674 transitions. [2021-06-12 19:20:35,759 INFO L78 Accepts]: Start accepts. Automaton has 6712 states and 17674 transitions. Word has length 47 [2021-06-12 19:20:35,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:20:35,760 INFO L482 AbstractCegarLoop]: Abstraction has 6712 states and 17674 transitions. [2021-06-12 19:20:35,760 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) [2021-06-12 19:20:35,760 INFO L276 IsEmpty]: Start isEmpty. Operand 6712 states and 17674 transitions. [2021-06-12 19:20:35,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-12 19:20:35,764 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:35,764 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:35,967 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable492,248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:20:35,967 INFO L430 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:35,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:35,967 INFO L82 PathProgramCache]: Analyzing trace with hash 902744311, now seen corresponding path program 133 times [2021-06-12 19:20:35,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:35,967 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810318023] [2021-06-12 19:20:35,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:35,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:36,066 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 14 proven. 81 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:20:36,066 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:36,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810318023] [2021-06-12 19:20:36,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810318023] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:36,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432462702] [2021-06-12 19:20:36,066 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 [2021-06-12 19:20:36,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:36,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 19:20:36,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:20:36,253 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 11 proven. 84 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:20:36,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [432462702] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:36,253 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:20:36,253 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-06-12 19:20:36,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578252739] [2021-06-12 19:20:36,254 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:20:36,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:36,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:20:36,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:20:36,254 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) [2021-06-12 19:20:36,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:20:36,696 INFO L93 Difference]: Finished difference Result 6816 states and 17833 transitions. [2021-06-12 19:20:36,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:20:36,696 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 [2021-06-12 19:20:36,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:20:36,702 INFO L225 Difference]: With dead ends: 6816 [2021-06-12 19:20:36,702 INFO L226 Difference]: Without dead ends: 6772 [2021-06-12 19:20:36,703 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 154.8ms TimeCoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:20:36,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6772 states. [2021-06-12 19:20:36,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6772 to 6712. [2021-06-12 19:20:36,764 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) [2021-06-12 19:20:36,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6712 states to 6712 states and 17665 transitions. [2021-06-12 19:20:36,774 INFO L78 Accepts]: Start accepts. Automaton has 6712 states and 17665 transitions. Word has length 47 [2021-06-12 19:20:36,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:20:36,774 INFO L482 AbstractCegarLoop]: Abstraction has 6712 states and 17665 transitions. [2021-06-12 19:20:36,774 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) [2021-06-12 19:20:36,774 INFO L276 IsEmpty]: Start isEmpty. Operand 6712 states and 17665 transitions. [2021-06-12 19:20:36,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-12 19:20:36,779 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:36,779 INFO L472 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:36,980 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable493,249 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:20:36,981 INFO L430 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:36,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:36,981 INFO L82 PathProgramCache]: Analyzing trace with hash -1077953366, now seen corresponding path program 66 times [2021-06-12 19:20:36,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:36,981 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454263619] [2021-06-12 19:20:36,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:36,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:37,058 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 40 proven. 57 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:20:37,058 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:37,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454263619] [2021-06-12 19:20:37,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454263619] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:37,058 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908432095] [2021-06-12 19:20:37,058 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-12 19:20:37,087 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-12 19:20:37,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:20:37,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 19:20:37,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:20:37,175 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 41 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:20:37,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1908432095] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:37,176 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:20:37,176 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 15 [2021-06-12 19:20:37,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360210419] [2021-06-12 19:20:37,176 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:20:37,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:37,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:20:37,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:20:37,176 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) [2021-06-12 19:20:37,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:20:37,455 INFO L93 Difference]: Finished difference Result 7827 states and 19871 transitions. [2021-06-12 19:20:37,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:20:37,455 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 [2021-06-12 19:20:37,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:20:37,462 INFO L225 Difference]: With dead ends: 7827 [2021-06-12 19:20:37,462 INFO L226 Difference]: Without dead ends: 7773 [2021-06-12 19:20:37,462 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 123.5ms TimeCoverageRelationStatistics Valid=98, Invalid=282, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:20:37,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7773 states. [2021-06-12 19:20:37,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7773 to 6518. [2021-06-12 19:20:37,536 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) [2021-06-12 19:20:37,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6518 states to 6518 states and 17157 transitions. [2021-06-12 19:20:37,546 INFO L78 Accepts]: Start accepts. Automaton has 6518 states and 17157 transitions. Word has length 47 [2021-06-12 19:20:37,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:20:37,546 INFO L482 AbstractCegarLoop]: Abstraction has 6518 states and 17157 transitions. [2021-06-12 19:20:37,546 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) [2021-06-12 19:20:37,546 INFO L276 IsEmpty]: Start isEmpty. Operand 6518 states and 17157 transitions. [2021-06-12 19:20:37,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-12 19:20:37,550 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:37,550 INFO L472 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:37,750 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable494,250 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:20:37,750 INFO L430 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:37,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:37,751 INFO L82 PathProgramCache]: Analyzing trace with hash 1517458978, now seen corresponding path program 134 times [2021-06-12 19:20:37,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:37,751 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260751309] [2021-06-12 19:20:37,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:37,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:37,821 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 45 proven. 52 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:20:37,822 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:37,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260751309] [2021-06-12 19:20:37,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260751309] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:37,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562536609] [2021-06-12 19:20:37,822 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 [2021-06-12 19:20:37,848 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:20:37,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:20:37,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 19:20:37,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:20:37,921 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 45 proven. 52 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:20:37,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [562536609] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:37,921 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:20:37,922 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-12 19:20:37,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22774367] [2021-06-12 19:20:37,922 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 19:20:37,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:37,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 19:20:37,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:20:37,922 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) [2021-06-12 19:20:38,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:20:38,130 INFO L93 Difference]: Finished difference Result 8402 states and 21039 transitions. [2021-06-12 19:20:38,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:20:38,131 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 [2021-06-12 19:20:38,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:20:38,138 INFO L225 Difference]: With dead ends: 8402 [2021-06-12 19:20:38,138 INFO L226 Difference]: Without dead ends: 8402 [2021-06-12 19:20:38,138 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 103.4ms TimeCoverageRelationStatistics Valid=105, Invalid=167, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:20:38,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8402 states. [2021-06-12 19:20:38,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8402 to 6836. [2021-06-12 19:20:38,208 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) [2021-06-12 19:20:38,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6836 states to 6836 states and 18121 transitions. [2021-06-12 19:20:38,217 INFO L78 Accepts]: Start accepts. Automaton has 6836 states and 18121 transitions. Word has length 47 [2021-06-12 19:20:38,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:20:38,217 INFO L482 AbstractCegarLoop]: Abstraction has 6836 states and 18121 transitions. [2021-06-12 19:20:38,218 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) [2021-06-12 19:20:38,218 INFO L276 IsEmpty]: Start isEmpty. Operand 6836 states and 18121 transitions. [2021-06-12 19:20:38,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-12 19:20:38,221 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:38,221 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:38,421 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable500,251 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:20:38,422 INFO L430 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:38,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:38,422 INFO L82 PathProgramCache]: Analyzing trace with hash -1223920619, now seen corresponding path program 67 times [2021-06-12 19:20:38,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:38,422 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075472477] [2021-06-12 19:20:38,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:38,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:38,500 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 89 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:20:38,501 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:38,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075472477] [2021-06-12 19:20:38,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075472477] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:38,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676193393] [2021-06-12 19:20:38,501 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 [2021-06-12 19:20:38,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:38,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 19:20:38,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:20:38,598 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 89 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:20:38,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [676193393] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:38,598 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:20:38,598 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-12 19:20:38,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023538385] [2021-06-12 19:20:38,599 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 19:20:38,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:38,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 19:20:38,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:20:38,600 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) [2021-06-12 19:20:38,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:20:38,999 INFO L93 Difference]: Finished difference Result 8432 states and 21485 transitions. [2021-06-12 19:20:39,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:20:39,000 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 [2021-06-12 19:20:39,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:20:39,010 INFO L225 Difference]: With dead ends: 8432 [2021-06-12 19:20:39,010 INFO L226 Difference]: Without dead ends: 8418 [2021-06-12 19:20:39,010 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 163.1ms TimeCoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:20:39,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8418 states. [2021-06-12 19:20:39,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8418 to 6863. [2021-06-12 19:20:39,092 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) [2021-06-12 19:20:39,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6863 states to 6863 states and 18200 transitions. [2021-06-12 19:20:39,103 INFO L78 Accepts]: Start accepts. Automaton has 6863 states and 18200 transitions. Word has length 47 [2021-06-12 19:20:39,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:20:39,103 INFO L482 AbstractCegarLoop]: Abstraction has 6863 states and 18200 transitions. [2021-06-12 19:20:39,103 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) [2021-06-12 19:20:39,103 INFO L276 IsEmpty]: Start isEmpty. Operand 6863 states and 18200 transitions. [2021-06-12 19:20:39,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-12 19:20:39,107 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:39,108 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:39,308 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable501 [2021-06-12 19:20:39,308 INFO L430 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:39,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:39,308 INFO L82 PathProgramCache]: Analyzing trace with hash -1400811563, now seen corresponding path program 135 times [2021-06-12 19:20:39,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:39,308 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100010324] [2021-06-12 19:20:39,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:39,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:39,396 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 14 proven. 81 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:20:39,396 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:39,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100010324] [2021-06-12 19:20:39,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100010324] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:39,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524935563] [2021-06-12 19:20:39,396 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 [2021-06-12 19:20:39,425 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-12 19:20:39,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:20:39,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 19:20:39,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:20:39,552 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 11 proven. 84 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:20:39,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1524935563] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:39,552 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:20:39,552 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-06-12 19:20:39,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585564432] [2021-06-12 19:20:39,553 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:20:39,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:39,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:20:39,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:20:39,553 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) [2021-06-12 19:20:39,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:20:39,859 INFO L93 Difference]: Finished difference Result 6912 states and 18275 transitions. [2021-06-12 19:20:39,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:20:39,859 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 [2021-06-12 19:20:39,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:20:39,866 INFO L225 Difference]: With dead ends: 6912 [2021-06-12 19:20:39,867 INFO L226 Difference]: Without dead ends: 6880 [2021-06-12 19:20:39,867 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 111.6ms TimeCoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:20:39,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6880 states. [2021-06-12 19:20:39,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6880 to 6863. [2021-06-12 19:20:39,937 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) [2021-06-12 19:20:39,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6863 states to 6863 states and 18194 transitions. [2021-06-12 19:20:39,947 INFO L78 Accepts]: Start accepts. Automaton has 6863 states and 18194 transitions. Word has length 47 [2021-06-12 19:20:39,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:20:39,947 INFO L482 AbstractCegarLoop]: Abstraction has 6863 states and 18194 transitions. [2021-06-12 19:20:39,947 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) [2021-06-12 19:20:39,947 INFO L276 IsEmpty]: Start isEmpty. Operand 6863 states and 18194 transitions. [2021-06-12 19:20:39,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-12 19:20:39,952 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:39,952 INFO L472 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:40,152 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 253 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable502 [2021-06-12 19:20:40,152 INFO L430 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:40,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:40,152 INFO L82 PathProgramCache]: Analyzing trace with hash 118327946, now seen corresponding path program 136 times [2021-06-12 19:20:40,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:40,153 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759638764] [2021-06-12 19:20:40,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:40,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:40,214 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 43 proven. 54 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:20:40,214 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:40,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759638764] [2021-06-12 19:20:40,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759638764] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:40,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249306942] [2021-06-12 19:20:40,215 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 [2021-06-12 19:20:40,241 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:20:40,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:20:40,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-12 19:20:40,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:20:40,340 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 72 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:20:40,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1249306942] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:40,340 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:20:40,340 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-06-12 19:20:40,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008556295] [2021-06-12 19:20:40,341 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:20:40,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:40,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:20:40,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:20:40,341 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) [2021-06-12 19:20:40,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:20:40,592 INFO L93 Difference]: Finished difference Result 8816 states and 22216 transitions. [2021-06-12 19:20:40,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:20:40,592 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 [2021-06-12 19:20:40,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:20:40,600 INFO L225 Difference]: With dead ends: 8816 [2021-06-12 19:20:40,600 INFO L226 Difference]: Without dead ends: 8816 [2021-06-12 19:20:40,600 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 92.1ms TimeCoverageRelationStatistics Valid=99, Invalid=141, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:20:40,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8816 states. [2021-06-12 19:20:40,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8816 to 7200. [2021-06-12 19:20:40,677 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) [2021-06-12 19:20:40,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7200 states to 7200 states and 19205 transitions. [2021-06-12 19:20:40,687 INFO L78 Accepts]: Start accepts. Automaton has 7200 states and 19205 transitions. Word has length 47 [2021-06-12 19:20:40,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:20:40,687 INFO L482 AbstractCegarLoop]: Abstraction has 7200 states and 19205 transitions. [2021-06-12 19:20:40,687 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) [2021-06-12 19:20:40,687 INFO L276 IsEmpty]: Start isEmpty. Operand 7200 states and 19205 transitions. [2021-06-12 19:20:40,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-12 19:20:40,691 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:40,691 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:40,891 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable503,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:20:40,891 INFO L430 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:40,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:40,892 INFO L82 PathProgramCache]: Analyzing trace with hash -652507721, now seen corresponding path program 68 times [2021-06-12 19:20:40,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:40,892 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916203895] [2021-06-12 19:20:40,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:40,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:40,968 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 89 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:20:40,968 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:40,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916203895] [2021-06-12 19:20:40,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916203895] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:40,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240125791] [2021-06-12 19:20:40,968 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 [2021-06-12 19:20:40,995 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:20:40,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:20:40,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 19:20:40,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:20:41,064 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 89 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:20:41,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [240125791] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:41,064 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:20:41,064 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-12 19:20:41,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849801013] [2021-06-12 19:20:41,064 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:20:41,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:41,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:20:41,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:20:41,065 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) [2021-06-12 19:20:41,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:20:41,416 INFO L93 Difference]: Finished difference Result 8160 states and 21168 transitions. [2021-06-12 19:20:41,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 19:20:41,417 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 [2021-06-12 19:20:41,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:20:41,425 INFO L225 Difference]: With dead ends: 8160 [2021-06-12 19:20:41,426 INFO L226 Difference]: Without dead ends: 8160 [2021-06-12 19:20:41,426 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 130.7ms TimeCoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:20:41,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8160 states. [2021-06-12 19:20:41,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8160 to 7218. [2021-06-12 19:20:41,501 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) [2021-06-12 19:20:41,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7218 states to 7218 states and 19256 transitions. [2021-06-12 19:20:41,511 INFO L78 Accepts]: Start accepts. Automaton has 7218 states and 19256 transitions. Word has length 47 [2021-06-12 19:20:41,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:20:41,511 INFO L482 AbstractCegarLoop]: Abstraction has 7218 states and 19256 transitions. [2021-06-12 19:20:41,511 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) [2021-06-12 19:20:41,511 INFO L276 IsEmpty]: Start isEmpty. Operand 7218 states and 19256 transitions. [2021-06-12 19:20:41,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-12 19:20:41,515 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:41,515 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:41,715 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable506,255 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:20:41,715 INFO L430 AbstractCegarLoop]: === Iteration 264 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:41,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:41,716 INFO L82 PathProgramCache]: Analyzing trace with hash 2009163191, now seen corresponding path program 137 times [2021-06-12 19:20:41,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:41,716 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373097048] [2021-06-12 19:20:41,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:41,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:41,794 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 14 proven. 81 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:20:41,794 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:41,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373097048] [2021-06-12 19:20:41,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373097048] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:41,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305245085] [2021-06-12 19:20:41,795 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 [2021-06-12 19:20:41,831 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-12 19:20:41,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:20:41,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 19:20:41,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:20:41,932 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 11 proven. 84 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:20:41,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [305245085] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:41,932 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:20:41,932 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-12 19:20:41,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505160927] [2021-06-12 19:20:41,933 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 19:20:41,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:41,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 19:20:41,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:20:41,933 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) [2021-06-12 19:20:42,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:20:42,219 INFO L93 Difference]: Finished difference Result 7286 states and 19355 transitions. [2021-06-12 19:20:42,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:20:42,219 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 [2021-06-12 19:20:42,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:20:42,226 INFO L225 Difference]: With dead ends: 7286 [2021-06-12 19:20:42,226 INFO L226 Difference]: Without dead ends: 7266 [2021-06-12 19:20:42,226 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 96.1ms TimeCoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:20:42,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7266 states. [2021-06-12 19:20:42,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7266 to 7218. [2021-06-12 19:20:42,299 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) [2021-06-12 19:20:42,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7218 states to 7218 states and 19253 transitions. [2021-06-12 19:20:42,311 INFO L78 Accepts]: Start accepts. Automaton has 7218 states and 19253 transitions. Word has length 47 [2021-06-12 19:20:42,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:20:42,311 INFO L482 AbstractCegarLoop]: Abstraction has 7218 states and 19253 transitions. [2021-06-12 19:20:42,311 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) [2021-06-12 19:20:42,311 INFO L276 IsEmpty]: Start isEmpty. Operand 7218 states and 19253 transitions. [2021-06-12 19:20:42,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-12 19:20:42,315 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:42,315 INFO L472 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:42,516 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable507,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:20:42,516 INFO L430 AbstractCegarLoop]: === Iteration 265 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:42,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:42,516 INFO L82 PathProgramCache]: Analyzing trace with hash -732216406, now seen corresponding path program 69 times [2021-06-12 19:20:42,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:42,516 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65243529] [2021-06-12 19:20:42,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:42,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:42,591 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 42 proven. 55 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:20:42,592 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:42,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65243529] [2021-06-12 19:20:42,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65243529] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:42,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324163593] [2021-06-12 19:20:42,592 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 [2021-06-12 19:20:42,643 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-12 19:20:42,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:20:42,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 19:20:42,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:20:42,727 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 43 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:20:42,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1324163593] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:42,727 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:20:42,727 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 11 [2021-06-12 19:20:42,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108902202] [2021-06-12 19:20:42,728 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 19:20:42,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:42,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 19:20:42,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:20:42,728 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) [2021-06-12 19:20:42,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:20:42,936 INFO L93 Difference]: Finished difference Result 7894 states and 20581 transitions. [2021-06-12 19:20:42,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:20:42,936 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 [2021-06-12 19:20:42,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:20:42,945 INFO L225 Difference]: With dead ends: 7894 [2021-06-12 19:20:42,945 INFO L226 Difference]: Without dead ends: 7878 [2021-06-12 19:20:42,945 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 89.5ms TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:20:42,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7878 states. [2021-06-12 19:20:43,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7878 to 7218. [2021-06-12 19:20:43,021 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) [2021-06-12 19:20:43,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7218 states to 7218 states and 19246 transitions. [2021-06-12 19:20:43,031 INFO L78 Accepts]: Start accepts. Automaton has 7218 states and 19246 transitions. Word has length 47 [2021-06-12 19:20:43,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:20:43,031 INFO L482 AbstractCegarLoop]: Abstraction has 7218 states and 19246 transitions. [2021-06-12 19:20:43,031 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) [2021-06-12 19:20:43,031 INFO L276 IsEmpty]: Start isEmpty. Operand 7218 states and 19246 transitions. [2021-06-12 19:20:43,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-12 19:20:43,035 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:43,035 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:43,237 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable508,257 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:20:43,237 INFO L430 AbstractCegarLoop]: === Iteration 266 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:43,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:43,238 INFO L82 PathProgramCache]: Analyzing trace with hash 330606421, now seen corresponding path program 70 times [2021-06-12 19:20:43,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:43,238 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618621134] [2021-06-12 19:20:43,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:43,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:43,309 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 89 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:20:43,309 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:43,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618621134] [2021-06-12 19:20:43,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618621134] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:43,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126788717] [2021-06-12 19:20:43,309 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-12 19:20:43,339 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:20:43,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:20:43,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 19:20:43,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:20:43,406 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 89 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:20:43,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126788717] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:43,406 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:20:43,407 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-12 19:20:43,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634100449] [2021-06-12 19:20:43,407 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 19:20:43,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:43,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 19:20:43,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:20:43,407 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) [2021-06-12 19:20:43,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:20:43,762 INFO L93 Difference]: Finished difference Result 7863 states and 20502 transitions. [2021-06-12 19:20:43,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:20:43,763 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 [2021-06-12 19:20:43,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:20:43,772 INFO L225 Difference]: With dead ends: 7863 [2021-06-12 19:20:43,772 INFO L226 Difference]: Without dead ends: 7855 [2021-06-12 19:20:43,772 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 105.2ms TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:20:43,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7855 states. [2021-06-12 19:20:43,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7855 to 7285. [2021-06-12 19:20:43,859 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) [2021-06-12 19:20:43,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7285 states to 7285 states and 19400 transitions. [2021-06-12 19:20:43,870 INFO L78 Accepts]: Start accepts. Automaton has 7285 states and 19400 transitions. Word has length 47 [2021-06-12 19:20:43,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:20:43,870 INFO L482 AbstractCegarLoop]: Abstraction has 7285 states and 19400 transitions. [2021-06-12 19:20:43,870 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) [2021-06-12 19:20:43,870 INFO L276 IsEmpty]: Start isEmpty. Operand 7285 states and 19400 transitions. [2021-06-12 19:20:43,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-12 19:20:43,875 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:43,875 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:44,075 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 258 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable512 [2021-06-12 19:20:44,075 INFO L430 AbstractCegarLoop]: === Iteration 267 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:44,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:44,076 INFO L82 PathProgramCache]: Analyzing trace with hash 1830939413, now seen corresponding path program 138 times [2021-06-12 19:20:44,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:44,076 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586307225] [2021-06-12 19:20:44,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:44,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:44,146 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 15 proven. 80 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:20:44,146 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:44,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586307225] [2021-06-12 19:20:44,146 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586307225] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:44,146 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348888726] [2021-06-12 19:20:44,146 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 [2021-06-12 19:20:44,175 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-12 19:20:44,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:20:44,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 19:20:44,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:20:44,256 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 11 proven. 84 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:20:44,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1348888726] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:44,256 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:20:44,256 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-06-12 19:20:44,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758244275] [2021-06-12 19:20:44,256 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 19:20:44,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:44,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 19:20:44,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:20:44,257 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) [2021-06-12 19:20:44,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:20:44,670 INFO L93 Difference]: Finished difference Result 7653 states and 20013 transitions. [2021-06-12 19:20:44,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:20:44,670 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 [2021-06-12 19:20:44,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:20:44,679 INFO L225 Difference]: With dead ends: 7653 [2021-06-12 19:20:44,679 INFO L226 Difference]: Without dead ends: 7538 [2021-06-12 19:20:44,679 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 105.5ms TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:20:44,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7538 states. [2021-06-12 19:20:44,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7538 to 7173. [2021-06-12 19:20:44,755 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) [2021-06-12 19:20:44,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7173 states to 7173 states and 19137 transitions. [2021-06-12 19:20:44,765 INFO L78 Accepts]: Start accepts. Automaton has 7173 states and 19137 transitions. Word has length 47 [2021-06-12 19:20:44,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:20:44,765 INFO L482 AbstractCegarLoop]: Abstraction has 7173 states and 19137 transitions. [2021-06-12 19:20:44,765 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) [2021-06-12 19:20:44,766 INFO L276 IsEmpty]: Start isEmpty. Operand 7173 states and 19137 transitions. [2021-06-12 19:20:44,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-12 19:20:44,769 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:44,769 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:44,970 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 259 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable513 [2021-06-12 19:20:44,970 INFO L430 AbstractCegarLoop]: === Iteration 268 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:44,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:44,970 INFO L82 PathProgramCache]: Analyzing trace with hash 1217403233, now seen corresponding path program 139 times [2021-06-12 19:20:44,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:44,970 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407102279] [2021-06-12 19:20:44,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:44,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:45,041 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 13 proven. 81 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:20:45,041 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:45,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407102279] [2021-06-12 19:20:45,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407102279] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:45,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815604382] [2021-06-12 19:20:45,041 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 [2021-06-12 19:20:45,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:45,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 19:20:45,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:20:45,136 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 82 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:20:45,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815604382] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:45,136 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:20:45,136 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-06-12 19:20:45,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705697554] [2021-06-12 19:20:45,136 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 19:20:45,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:45,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 19:20:45,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:20:45,137 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) [2021-06-12 19:20:45,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:20:45,445 INFO L93 Difference]: Finished difference Result 7696 states and 20154 transitions. [2021-06-12 19:20:45,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:20:45,446 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 [2021-06-12 19:20:45,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:20:45,453 INFO L225 Difference]: With dead ends: 7696 [2021-06-12 19:20:45,453 INFO L226 Difference]: Without dead ends: 7684 [2021-06-12 19:20:45,453 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 106.2ms TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:20:45,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7684 states. [2021-06-12 19:20:45,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7684 to 7175. [2021-06-12 19:20:45,528 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) [2021-06-12 19:20:45,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7175 states to 7175 states and 19141 transitions. [2021-06-12 19:20:45,539 INFO L78 Accepts]: Start accepts. Automaton has 7175 states and 19141 transitions. Word has length 47 [2021-06-12 19:20:45,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:20:45,539 INFO L482 AbstractCegarLoop]: Abstraction has 7175 states and 19141 transitions. [2021-06-12 19:20:45,539 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) [2021-06-12 19:20:45,539 INFO L276 IsEmpty]: Start isEmpty. Operand 7175 states and 19141 transitions. [2021-06-12 19:20:45,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-12 19:20:45,544 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:45,544 INFO L472 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:45,744 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable514,260 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:20:45,744 INFO L430 AbstractCegarLoop]: === Iteration 269 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:45,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:45,744 INFO L82 PathProgramCache]: Analyzing trace with hash -430954270, now seen corresponding path program 140 times [2021-06-12 19:20:45,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:45,744 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322688537] [2021-06-12 19:20:45,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:45,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:45,805 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 40 proven. 58 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:20:45,805 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:45,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322688537] [2021-06-12 19:20:45,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322688537] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:45,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365227790] [2021-06-12 19:20:45,806 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 [2021-06-12 19:20:45,831 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:20:45,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:20:45,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 19:20:45,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:20:45,899 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 40 proven. 58 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:20:45,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [365227790] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:45,899 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:20:45,899 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-12 19:20:45,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226083527] [2021-06-12 19:20:45,899 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 19:20:45,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:45,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 19:20:45,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:20:45,900 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) [2021-06-12 19:20:46,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:20:46,025 INFO L93 Difference]: Finished difference Result 8501 states and 21546 transitions. [2021-06-12 19:20:46,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:20:46,025 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 [2021-06-12 19:20:46,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:20:46,035 INFO L225 Difference]: With dead ends: 8501 [2021-06-12 19:20:46,036 INFO L226 Difference]: Without dead ends: 8495 [2021-06-12 19:20:46,036 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 55.8ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:20:46,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8495 states. [2021-06-12 19:20:46,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8495 to 7174. [2021-06-12 19:20:46,136 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) [2021-06-12 19:20:46,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7174 states to 7174 states and 19134 transitions. [2021-06-12 19:20:46,148 INFO L78 Accepts]: Start accepts. Automaton has 7174 states and 19134 transitions. Word has length 47 [2021-06-12 19:20:46,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:20:46,148 INFO L482 AbstractCegarLoop]: Abstraction has 7174 states and 19134 transitions. [2021-06-12 19:20:46,149 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) [2021-06-12 19:20:46,149 INFO L276 IsEmpty]: Start isEmpty. Operand 7174 states and 19134 transitions. [2021-06-12 19:20:46,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-12 19:20:46,153 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:46,153 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:46,353 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable515,261 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:20:46,354 INFO L430 AbstractCegarLoop]: === Iteration 270 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:46,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:46,354 INFO L82 PathProgramCache]: Analyzing trace with hash -935646729, now seen corresponding path program 141 times [2021-06-12 19:20:46,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:46,354 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688414491] [2021-06-12 19:20:46,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:46,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:46,459 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 13 proven. 82 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:20:46,460 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:46,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688414491] [2021-06-12 19:20:46,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688414491] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:46,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986327968] [2021-06-12 19:20:46,460 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 [2021-06-12 19:20:46,489 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-12 19:20:46,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:20:46,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 19:20:46,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:20:46,557 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 83 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:20:46,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [986327968] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:46,558 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:20:46,558 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-12 19:20:46,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405270357] [2021-06-12 19:20:46,558 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:20:46,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:46,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:20:46,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:20:46,558 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) [2021-06-12 19:20:47,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:20:47,040 INFO L93 Difference]: Finished difference Result 8738 states and 22335 transitions. [2021-06-12 19:20:47,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 19:20:47,040 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 [2021-06-12 19:20:47,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:20:47,050 INFO L225 Difference]: With dead ends: 8738 [2021-06-12 19:20:47,050 INFO L226 Difference]: Without dead ends: 8684 [2021-06-12 19:20:47,051 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 236.8ms TimeCoverageRelationStatistics Valid=105, Invalid=597, Unknown=0, NotChecked=0, Total=702 [2021-06-12 19:20:47,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8684 states. [2021-06-12 19:20:47,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8684 to 7281. [2021-06-12 19:20:47,143 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) [2021-06-12 19:20:47,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7281 states to 7281 states and 19412 transitions. [2021-06-12 19:20:47,154 INFO L78 Accepts]: Start accepts. Automaton has 7281 states and 19412 transitions. Word has length 47 [2021-06-12 19:20:47,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:20:47,154 INFO L482 AbstractCegarLoop]: Abstraction has 7281 states and 19412 transitions. [2021-06-12 19:20:47,154 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) [2021-06-12 19:20:47,154 INFO L276 IsEmpty]: Start isEmpty. Operand 7281 states and 19412 transitions. [2021-06-12 19:20:47,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-12 19:20:47,159 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:47,159 INFO L472 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:47,359 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable518,262 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:20:47,359 INFO L430 AbstractCegarLoop]: === Iteration 271 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:47,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:47,360 INFO L82 PathProgramCache]: Analyzing trace with hash 596912380, now seen corresponding path program 142 times [2021-06-12 19:20:47,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:47,360 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034414913] [2021-06-12 19:20:47,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:47,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:47,422 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:20:47,422 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:47,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034414913] [2021-06-12 19:20:47,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1034414913] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:47,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422943848] [2021-06-12 19:20:47,423 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 [2021-06-12 19:20:47,449 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:20:47,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:20:47,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 19:20:47,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:20:47,521 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:20:47,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1422943848] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:47,521 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:20:47,521 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-12 19:20:47,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461680608] [2021-06-12 19:20:47,521 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:20:47,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:47,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:20:47,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:20:47,522 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) [2021-06-12 19:20:47,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:20:47,706 INFO L93 Difference]: Finished difference Result 8660 states and 21915 transitions. [2021-06-12 19:20:47,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:20:47,707 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 [2021-06-12 19:20:47,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:20:47,719 INFO L225 Difference]: With dead ends: 8660 [2021-06-12 19:20:47,719 INFO L226 Difference]: Without dead ends: 8642 [2021-06-12 19:20:47,719 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 70.2ms TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:20:47,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8642 states. [2021-06-12 19:20:47,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8642 to 7281. [2021-06-12 19:20:47,833 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) [2021-06-12 19:20:47,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7281 states to 7281 states and 19405 transitions. [2021-06-12 19:20:47,847 INFO L78 Accepts]: Start accepts. Automaton has 7281 states and 19405 transitions. Word has length 47 [2021-06-12 19:20:47,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:20:47,847 INFO L482 AbstractCegarLoop]: Abstraction has 7281 states and 19405 transitions. [2021-06-12 19:20:47,847 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) [2021-06-12 19:20:47,847 INFO L276 IsEmpty]: Start isEmpty. Operand 7281 states and 19405 transitions. [2021-06-12 19:20:47,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-12 19:20:47,851 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:47,851 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:48,052 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable519,263 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:20:48,052 INFO L430 AbstractCegarLoop]: === Iteration 272 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:48,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:48,052 INFO L82 PathProgramCache]: Analyzing trace with hash -780810195, now seen corresponding path program 143 times [2021-06-12 19:20:48,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:48,052 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285235729] [2021-06-12 19:20:48,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:48,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:48,135 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 13 proven. 82 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:20:48,135 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:48,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285235729] [2021-06-12 19:20:48,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285235729] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:48,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936083135] [2021-06-12 19:20:48,135 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 [2021-06-12 19:20:48,164 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-06-12 19:20:48,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:20:48,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 19:20:48,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:20:48,233 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 83 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:20:48,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1936083135] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:48,233 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:20:48,233 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-12 19:20:48,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549147774] [2021-06-12 19:20:48,233 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 19:20:48,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:48,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 19:20:48,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:20:48,233 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) [2021-06-12 19:20:49,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:20:49,018 INFO L93 Difference]: Finished difference Result 11178 states and 27510 transitions. [2021-06-12 19:20:49,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-12 19:20:49,018 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 [2021-06-12 19:20:49,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:20:49,030 INFO L225 Difference]: With dead ends: 11178 [2021-06-12 19:20:49,030 INFO L226 Difference]: Without dead ends: 11010 [2021-06-12 19:20:49,031 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 629 ImplicationChecksByTransitivity, 414.1ms TimeCoverageRelationStatistics Valid=267, Invalid=1895, Unknown=0, NotChecked=0, Total=2162 [2021-06-12 19:20:49,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11010 states. [2021-06-12 19:20:49,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11010 to 7582. [2021-06-12 19:20:49,139 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) [2021-06-12 19:20:49,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7582 states to 7582 states and 20135 transitions. [2021-06-12 19:20:49,151 INFO L78 Accepts]: Start accepts. Automaton has 7582 states and 20135 transitions. Word has length 47 [2021-06-12 19:20:49,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:20:49,151 INFO L482 AbstractCegarLoop]: Abstraction has 7582 states and 20135 transitions. [2021-06-12 19:20:49,151 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) [2021-06-12 19:20:49,152 INFO L276 IsEmpty]: Start isEmpty. Operand 7582 states and 20135 transitions. [2021-06-12 19:20:49,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-12 19:20:49,156 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:49,156 INFO L472 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:49,356 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable523 [2021-06-12 19:20:49,356 INFO L430 AbstractCegarLoop]: === Iteration 273 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:49,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:49,357 INFO L82 PathProgramCache]: Analyzing trace with hash -394207518, now seen corresponding path program 144 times [2021-06-12 19:20:49,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:49,357 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620073616] [2021-06-12 19:20:49,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:49,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:49,468 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 31 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:20:49,468 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:49,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620073616] [2021-06-12 19:20:49,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620073616] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:49,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303273211] [2021-06-12 19:20:49,468 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 [2021-06-12 19:20:49,504 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-12 19:20:49,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:20:49,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 19:20:49,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:20:49,574 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 31 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:20:49,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [303273211] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:49,574 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:20:49,574 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-12 19:20:49,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085357834] [2021-06-12 19:20:49,574 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 19:20:49,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:49,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 19:20:49,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:20:49,574 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) [2021-06-12 19:20:49,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:20:49,729 INFO L93 Difference]: Finished difference Result 9069 states and 22840 transitions. [2021-06-12 19:20:49,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:20:49,729 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 [2021-06-12 19:20:49,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:20:49,738 INFO L225 Difference]: With dead ends: 9069 [2021-06-12 19:20:49,738 INFO L226 Difference]: Without dead ends: 9042 [2021-06-12 19:20:49,738 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 123.9ms TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:20:49,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9042 states. [2021-06-12 19:20:49,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9042 to 7582. [2021-06-12 19:20:49,828 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) [2021-06-12 19:20:49,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7582 states to 7582 states and 20132 transitions. [2021-06-12 19:20:49,840 INFO L78 Accepts]: Start accepts. Automaton has 7582 states and 20132 transitions. Word has length 47 [2021-06-12 19:20:49,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:20:49,840 INFO L482 AbstractCegarLoop]: Abstraction has 7582 states and 20132 transitions. [2021-06-12 19:20:49,840 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) [2021-06-12 19:20:49,840 INFO L276 IsEmpty]: Start isEmpty. Operand 7582 states and 20132 transitions. [2021-06-12 19:20:49,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-12 19:20:49,844 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:49,844 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:50,045 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 265 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable524 [2021-06-12 19:20:50,045 INFO L430 AbstractCegarLoop]: === Iteration 274 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:50,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:50,045 INFO L82 PathProgramCache]: Analyzing trace with hash -840501705, now seen corresponding path program 145 times [2021-06-12 19:20:50,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:50,045 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522233962] [2021-06-12 19:20:50,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:50,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:50,150 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 13 proven. 82 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:20:50,150 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:50,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522233962] [2021-06-12 19:20:50,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522233962] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:50,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811777114] [2021-06-12 19:20:50,150 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 [2021-06-12 19:20:50,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:50,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-12 19:20:50,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:20:50,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:20:50,304 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 [2021-06-12 19:20:50,305 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:20:50,307 INFO L628 ElimStorePlain]: treesize reduction 20, result has 4.8 percent of original size [2021-06-12 19:20:50,307 INFO L518 ElimStorePlain]: Eliminatee B vanished before elimination [2021-06-12 19:20:50,307 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:20:50,307 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:1 [2021-06-12 19:20:50,314 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 16 proven. 79 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:20:50,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [811777114] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:50,314 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:20:50,314 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-12 19:20:50,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336841058] [2021-06-12 19:20:50,315 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:20:50,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:50,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:20:50,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:20:50,315 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) [2021-06-12 19:20:51,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:20:51,648 INFO L93 Difference]: Finished difference Result 16993 states and 39932 transitions. [2021-06-12 19:20:51,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-06-12 19:20:51,648 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 [2021-06-12 19:20:51,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:20:51,666 INFO L225 Difference]: With dead ends: 16993 [2021-06-12 19:20:51,667 INFO L226 Difference]: Without dead ends: 16471 [2021-06-12 19:20:51,667 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2193 ImplicationChecksByTransitivity, 829.9ms TimeCoverageRelationStatistics Valid=645, Invalid=5517, Unknown=0, NotChecked=0, Total=6162 [2021-06-12 19:20:51,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16471 states. [2021-06-12 19:20:51,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16471 to 8142. [2021-06-12 19:20:51,807 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) [2021-06-12 19:20:51,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8142 states to 8142 states and 21477 transitions. [2021-06-12 19:20:51,820 INFO L78 Accepts]: Start accepts. Automaton has 8142 states and 21477 transitions. Word has length 47 [2021-06-12 19:20:51,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:20:51,820 INFO L482 AbstractCegarLoop]: Abstraction has 8142 states and 21477 transitions. [2021-06-12 19:20:51,820 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) [2021-06-12 19:20:51,820 INFO L276 IsEmpty]: Start isEmpty. Operand 8142 states and 21477 transitions. [2021-06-12 19:20:51,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-12 19:20:51,825 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:51,825 INFO L472 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:52,025 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 266 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable529 [2021-06-12 19:20:52,025 INFO L430 AbstractCegarLoop]: === Iteration 275 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:52,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:52,025 INFO L82 PathProgramCache]: Analyzing trace with hash 1053071164, now seen corresponding path program 146 times [2021-06-12 19:20:52,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:52,025 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131050192] [2021-06-12 19:20:52,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:52,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:52,109 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 32 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:20:52,109 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:52,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131050192] [2021-06-12 19:20:52,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131050192] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:52,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52262050] [2021-06-12 19:20:52,110 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 [2021-06-12 19:20:52,136 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:20:52,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:20:52,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 19:20:52,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:20:52,204 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 32 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:20:52,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [52262050] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:52,204 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:20:52,204 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-06-12 19:20:52,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520041942] [2021-06-12 19:20:52,205 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:20:52,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:52,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:20:52,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:20:52,205 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) [2021-06-12 19:20:52,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:20:52,424 INFO L93 Difference]: Finished difference Result 9828 states and 24560 transitions. [2021-06-12 19:20:52,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:20:52,424 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 [2021-06-12 19:20:52,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:20:52,434 INFO L225 Difference]: With dead ends: 9828 [2021-06-12 19:20:52,434 INFO L226 Difference]: Without dead ends: 9792 [2021-06-12 19:20:52,434 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 103.1ms TimeCoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:20:52,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9792 states. [2021-06-12 19:20:52,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9792 to 8142. [2021-06-12 19:20:52,537 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) [2021-06-12 19:20:52,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8142 states to 8142 states and 21474 transitions. [2021-06-12 19:20:52,550 INFO L78 Accepts]: Start accepts. Automaton has 8142 states and 21474 transitions. Word has length 47 [2021-06-12 19:20:52,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:20:52,550 INFO L482 AbstractCegarLoop]: Abstraction has 8142 states and 21474 transitions. [2021-06-12 19:20:52,551 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) [2021-06-12 19:20:52,551 INFO L276 IsEmpty]: Start isEmpty. Operand 8142 states and 21474 transitions. [2021-06-12 19:20:52,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-12 19:20:52,555 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:52,555 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:52,756 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 267 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable530 [2021-06-12 19:20:52,756 INFO L430 AbstractCegarLoop]: === Iteration 276 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:52,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:52,756 INFO L82 PathProgramCache]: Analyzing trace with hash -993815571, now seen corresponding path program 147 times [2021-06-12 19:20:52,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:52,756 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556564048] [2021-06-12 19:20:52,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:52,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:52,852 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 13 proven. 82 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:20:52,853 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:52,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556564048] [2021-06-12 19:20:52,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556564048] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:52,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615336603] [2021-06-12 19:20:52,853 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 [2021-06-12 19:20:52,881 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-12 19:20:52,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:20:52,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 19:20:52,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:20:52,948 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 83 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:20:52,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [615336603] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:52,948 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:20:52,948 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-12 19:20:52,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568633333] [2021-06-12 19:20:52,948 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:20:52,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:52,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:20:52,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:20:52,949 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) [2021-06-12 19:20:55,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:20:55,003 INFO L93 Difference]: Finished difference Result 19383 states and 45637 transitions. [2021-06-12 19:20:55,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2021-06-12 19:20:55,003 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 [2021-06-12 19:20:55,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:20:55,023 INFO L225 Difference]: With dead ends: 19383 [2021-06-12 19:20:55,023 INFO L226 Difference]: Without dead ends: 18765 [2021-06-12 19:20:55,024 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6450 ImplicationChecksByTransitivity, 1536.1ms TimeCoverageRelationStatistics Valid=1455, Invalid=14547, Unknown=0, NotChecked=0, Total=16002 [2021-06-12 19:20:55,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18765 states. [2021-06-12 19:20:55,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18765 to 8971. [2021-06-12 19:20:55,221 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) [2021-06-12 19:20:55,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8971 states to 8971 states and 23486 transitions. [2021-06-12 19:20:55,235 INFO L78 Accepts]: Start accepts. Automaton has 8971 states and 23486 transitions. Word has length 47 [2021-06-12 19:20:55,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:20:55,235 INFO L482 AbstractCegarLoop]: Abstraction has 8971 states and 23486 transitions. [2021-06-12 19:20:55,235 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) [2021-06-12 19:20:55,235 INFO L276 IsEmpty]: Start isEmpty. Operand 8971 states and 23486 transitions. [2021-06-12 19:20:55,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-12 19:20:55,240 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:55,240 INFO L472 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:55,443 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 268 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable536 [2021-06-12 19:20:55,443 INFO L430 AbstractCegarLoop]: === Iteration 277 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:55,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:55,444 INFO L82 PathProgramCache]: Analyzing trace with hash -244397918, now seen corresponding path program 148 times [2021-06-12 19:20:55,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:55,444 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941498250] [2021-06-12 19:20:55,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:55,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:55,536 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 39 proven. 59 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:20:55,536 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:55,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941498250] [2021-06-12 19:20:55,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941498250] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:55,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832447577] [2021-06-12 19:20:55,536 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 [2021-06-12 19:20:55,562 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:20:55,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:20:55,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 19:20:55,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:20:55,634 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 39 proven. 59 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:20:55,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [832447577] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:55,635 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:20:55,635 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-06-12 19:20:55,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138024124] [2021-06-12 19:20:55,635 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:20:55,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:55,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:20:55,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:20:55,635 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) [2021-06-12 19:20:55,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:20:55,843 INFO L93 Difference]: Finished difference Result 11009 states and 27233 transitions. [2021-06-12 19:20:55,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:20:55,843 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 [2021-06-12 19:20:55,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:20:55,853 INFO L225 Difference]: With dead ends: 11009 [2021-06-12 19:20:55,853 INFO L226 Difference]: Without dead ends: 10964 [2021-06-12 19:20:55,853 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 126.2ms TimeCoverageRelationStatistics Valid=110, Invalid=232, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:20:55,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10964 states. [2021-06-12 19:20:55,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10964 to 8971. [2021-06-12 19:20:55,947 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) [2021-06-12 19:20:55,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8971 states to 8971 states and 23483 transitions. [2021-06-12 19:20:55,959 INFO L78 Accepts]: Start accepts. Automaton has 8971 states and 23483 transitions. Word has length 47 [2021-06-12 19:20:55,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:20:55,959 INFO L482 AbstractCegarLoop]: Abstraction has 8971 states and 23483 transitions. [2021-06-12 19:20:55,959 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) [2021-06-12 19:20:55,959 INFO L276 IsEmpty]: Start isEmpty. Operand 8971 states and 23483 transitions. [2021-06-12 19:20:55,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-12 19:20:55,963 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:55,964 INFO L472 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:56,164 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 269 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable537 [2021-06-12 19:20:56,164 INFO L430 AbstractCegarLoop]: === Iteration 278 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:56,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:56,164 INFO L82 PathProgramCache]: Analyzing trace with hash 1478005367, now seen corresponding path program 149 times [2021-06-12 19:20:56,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:56,164 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311351884] [2021-06-12 19:20:56,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:56,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:56,284 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:56,284 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:56,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311351884] [2021-06-12 19:20:56,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311351884] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:56,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372633798] [2021-06-12 19:20:56,285 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 [2021-06-12 19:20:56,345 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-06-12 19:20:56,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:20:56,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 19:20:56,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:20:56,414 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:56,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [372633798] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:56,414 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:20:56,414 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-12 19:20:56,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363267504] [2021-06-12 19:20:56,415 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:20:56,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:56,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:20:56,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:20:56,415 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) [2021-06-12 19:20:56,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:20:56,928 INFO L93 Difference]: Finished difference Result 11682 states and 28568 transitions. [2021-06-12 19:20:56,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 19:20:56,928 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 [2021-06-12 19:20:56,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:20:56,937 INFO L225 Difference]: With dead ends: 11682 [2021-06-12 19:20:56,938 INFO L226 Difference]: Without dead ends: 10842 [2021-06-12 19:20:56,938 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 309.2ms TimeCoverageRelationStatistics Valid=169, Invalid=761, Unknown=0, NotChecked=0, Total=930 [2021-06-12 19:20:56,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10842 states. [2021-06-12 19:20:57,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10842 to 6870. [2021-06-12 19:20:57,012 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) [2021-06-12 19:20:57,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6870 states to 6870 states and 18457 transitions. [2021-06-12 19:20:57,022 INFO L78 Accepts]: Start accepts. Automaton has 6870 states and 18457 transitions. Word has length 47 [2021-06-12 19:20:57,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:20:57,022 INFO L482 AbstractCegarLoop]: Abstraction has 6870 states and 18457 transitions. [2021-06-12 19:20:57,022 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) [2021-06-12 19:20:57,022 INFO L276 IsEmpty]: Start isEmpty. Operand 6870 states and 18457 transitions. [2021-06-12 19:20:57,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-12 19:20:57,026 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:57,026 INFO L472 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:57,226 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable544,270 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:20:57,226 INFO L430 AbstractCegarLoop]: === Iteration 279 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:57,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:57,227 INFO L82 PathProgramCache]: Analyzing trace with hash 1239943850, now seen corresponding path program 71 times [2021-06-12 19:20:57,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:57,227 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674434381] [2021-06-12 19:20:57,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:57,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:57,282 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 67 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:57,282 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:57,282 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674434381] [2021-06-12 19:20:57,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674434381] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:57,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767477462] [2021-06-12 19:20:57,283 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 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 [2021-06-12 19:20:57,312 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-06-12 19:20:57,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:20:57,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 19:20:57,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:20:57,413 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 67 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:57,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [767477462] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:57,414 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:20:57,414 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 16 [2021-06-12 19:20:57,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373379244] [2021-06-12 19:20:57,414 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:20:57,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:57,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:20:57,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=171, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:20:57,414 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) [2021-06-12 19:20:57,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:20:57,700 INFO L93 Difference]: Finished difference Result 8334 states and 21563 transitions. [2021-06-12 19:20:57,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 19:20:57,700 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 [2021-06-12 19:20:57,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:20:57,710 INFO L225 Difference]: With dead ends: 8334 [2021-06-12 19:20:57,710 INFO L226 Difference]: Without dead ends: 8318 [2021-06-12 19:20:57,710 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 99.7ms TimeCoverageRelationStatistics Valid=118, Invalid=224, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:20:57,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8318 states. [2021-06-12 19:20:57,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8318 to 7293. [2021-06-12 19:20:57,794 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) [2021-06-12 19:20:57,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7293 states to 7293 states and 19589 transitions. [2021-06-12 19:20:57,806 INFO L78 Accepts]: Start accepts. Automaton has 7293 states and 19589 transitions. Word has length 47 [2021-06-12 19:20:57,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:20:57,806 INFO L482 AbstractCegarLoop]: Abstraction has 7293 states and 19589 transitions. [2021-06-12 19:20:57,806 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) [2021-06-12 19:20:57,806 INFO L276 IsEmpty]: Start isEmpty. Operand 7293 states and 19589 transitions. [2021-06-12 19:20:57,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-12 19:20:57,810 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:57,811 INFO L472 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:58,011 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 271 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable545 [2021-06-12 19:20:58,011 INFO L430 AbstractCegarLoop]: === Iteration 280 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:58,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:58,011 INFO L82 PathProgramCache]: Analyzing trace with hash 618063440, now seen corresponding path program 72 times [2021-06-12 19:20:58,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:58,011 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470139012] [2021-06-12 19:20:58,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:58,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:58,068 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 67 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:20:58,069 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:58,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470139012] [2021-06-12 19:20:58,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470139012] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:58,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175836991] [2021-06-12 19:20:58,069 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 [2021-06-12 19:20:58,097 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-06-12 19:20:58,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:20:58,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 19:20:58,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:20:58,210 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 67 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:20:58,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [175836991] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:58,210 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:20:58,211 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 10 [2021-06-12 19:20:58,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765551630] [2021-06-12 19:20:58,211 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:20:58,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:58,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:20:58,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:20:58,211 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) [2021-06-12 19:20:58,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:20:58,489 INFO L93 Difference]: Finished difference Result 8900 states and 22808 transitions. [2021-06-12 19:20:58,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 19:20:58,489 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 [2021-06-12 19:20:58,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:20:58,498 INFO L225 Difference]: With dead ends: 8900 [2021-06-12 19:20:58,498 INFO L226 Difference]: Without dead ends: 8900 [2021-06-12 19:20:58,498 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 99.5ms TimeCoverageRelationStatistics Valid=113, Invalid=159, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:20:58,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8900 states. [2021-06-12 19:20:58,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8900 to 7296. [2021-06-12 19:20:58,585 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) [2021-06-12 19:20:58,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7296 states to 7296 states and 19598 transitions. [2021-06-12 19:20:58,597 INFO L78 Accepts]: Start accepts. Automaton has 7296 states and 19598 transitions. Word has length 47 [2021-06-12 19:20:58,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:20:58,597 INFO L482 AbstractCegarLoop]: Abstraction has 7296 states and 19598 transitions. [2021-06-12 19:20:58,597 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) [2021-06-12 19:20:58,597 INFO L276 IsEmpty]: Start isEmpty. Operand 7296 states and 19598 transitions. [2021-06-12 19:20:58,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-12 19:20:58,601 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:58,601 INFO L472 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:58,801 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable547,272 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:20:58,802 INFO L430 AbstractCegarLoop]: === Iteration 281 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:58,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:58,802 INFO L82 PathProgramCache]: Analyzing trace with hash -1019509016, now seen corresponding path program 73 times [2021-06-12 19:20:58,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:58,802 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972334826] [2021-06-12 19:20:58,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:58,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:58,868 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 68 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:20:58,869 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:58,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972334826] [2021-06-12 19:20:58,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972334826] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:58,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358927975] [2021-06-12 19:20:58,869 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-12 19:20:58,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:58,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-12 19:20:58,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:20:58,987 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 69 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:20:58,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1358927975] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:58,987 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:20:58,987 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 13 [2021-06-12 19:20:58,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698123793] [2021-06-12 19:20:58,987 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:20:58,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:58,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:20:58,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:20:58,988 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) [2021-06-12 19:20:59,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:20:59,373 INFO L93 Difference]: Finished difference Result 8356 states and 21589 transitions. [2021-06-12 19:20:59,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 19:20:59,373 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 [2021-06-12 19:20:59,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:20:59,381 INFO L225 Difference]: With dead ends: 8356 [2021-06-12 19:20:59,381 INFO L226 Difference]: Without dead ends: 8356 [2021-06-12 19:20:59,381 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 205.9ms TimeCoverageRelationStatistics Valid=246, Invalid=404, Unknown=0, NotChecked=0, Total=650 [2021-06-12 19:20:59,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8356 states. [2021-06-12 19:20:59,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8356 to 7143. [2021-06-12 19:20:59,453 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) [2021-06-12 19:20:59,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7143 states to 7143 states and 19215 transitions. [2021-06-12 19:20:59,463 INFO L78 Accepts]: Start accepts. Automaton has 7143 states and 19215 transitions. Word has length 47 [2021-06-12 19:20:59,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:20:59,463 INFO L482 AbstractCegarLoop]: Abstraction has 7143 states and 19215 transitions. [2021-06-12 19:20:59,463 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) [2021-06-12 19:20:59,463 INFO L276 IsEmpty]: Start isEmpty. Operand 7143 states and 19215 transitions. [2021-06-12 19:20:59,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-06-12 19:20:59,466 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:20:59,466 INFO L472 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:20:59,666 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable548,273 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:20:59,667 INFO L430 AbstractCegarLoop]: === Iteration 282 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:20:59,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:20:59,667 INFO L82 PathProgramCache]: Analyzing trace with hash 1559844220, now seen corresponding path program 150 times [2021-06-12 19:20:59,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:20:59,667 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181680394] [2021-06-12 19:20:59,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:20:59,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:20:59,772 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 53 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:59,772 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:20:59,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181680394] [2021-06-12 19:20:59,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181680394] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:59,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184211415] [2021-06-12 19:20:59,773 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 [2021-06-12 19:20:59,800 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-12 19:20:59,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:20:59,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-12 19:20:59,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:20:59,873 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 53 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:20:59,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1184211415] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:20:59,874 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:20:59,874 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-06-12 19:20:59,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215265231] [2021-06-12 19:20:59,874 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:20:59,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:20:59,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:20:59,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:20:59,874 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) [2021-06-12 19:21:00,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:00,113 INFO L93 Difference]: Finished difference Result 8410 states and 21506 transitions. [2021-06-12 19:21:00,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:21:00,114 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 [2021-06-12 19:21:00,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:00,122 INFO L225 Difference]: With dead ends: 8410 [2021-06-12 19:21:00,122 INFO L226 Difference]: Without dead ends: 8354 [2021-06-12 19:21:00,122 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 149.8ms TimeCoverageRelationStatistics Valid=132, Invalid=288, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:21:00,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8354 states. [2021-06-12 19:21:00,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8354 to 7152. [2021-06-12 19:21:00,206 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) [2021-06-12 19:21:00,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7152 states to 7152 states and 19229 transitions. [2021-06-12 19:21:00,217 INFO L78 Accepts]: Start accepts. Automaton has 7152 states and 19229 transitions. Word has length 47 [2021-06-12 19:21:00,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:00,217 INFO L482 AbstractCegarLoop]: Abstraction has 7152 states and 19229 transitions. [2021-06-12 19:21:00,217 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) [2021-06-12 19:21:00,217 INFO L276 IsEmpty]: Start isEmpty. Operand 7152 states and 19229 transitions. [2021-06-12 19:21:00,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-06-12 19:21:00,221 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:00,221 INFO L472 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:00,422 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable551,274 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:00,422 INFO L430 AbstractCegarLoop]: === Iteration 283 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:00,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:00,422 INFO L82 PathProgramCache]: Analyzing trace with hash -2086787547, now seen corresponding path program 151 times [2021-06-12 19:21:00,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:00,422 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010511900] [2021-06-12 19:21:00,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:00,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:00,476 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 113 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:21:00,476 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:00,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010511900] [2021-06-12 19:21:00,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010511900] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:00,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215816464] [2021-06-12 19:21:00,476 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 [2021-06-12 19:21:00,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:00,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-12 19:21:00,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:00,774 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 51 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:00,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [215816464] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:00,774 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:00,774 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 15] total 22 [2021-06-12 19:21:00,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849589230] [2021-06-12 19:21:00,774 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 19:21:00,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:00,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 19:21:00,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:21:00,775 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) [2021-06-12 19:21:02,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:02,000 INFO L93 Difference]: Finished difference Result 9713 states and 24252 transitions. [2021-06-12 19:21:02,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-12 19:21:02,000 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 [2021-06-12 19:21:02,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:02,010 INFO L225 Difference]: With dead ends: 9713 [2021-06-12 19:21:02,011 INFO L226 Difference]: Without dead ends: 9671 [2021-06-12 19:21:02,011 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 684 ImplicationChecksByTransitivity, 706.8ms TimeCoverageRelationStatistics Valid=620, Invalid=2460, Unknown=0, NotChecked=0, Total=3080 [2021-06-12 19:21:02,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9671 states. [2021-06-12 19:21:02,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9671 to 7802. [2021-06-12 19:21:02,109 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) [2021-06-12 19:21:02,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7802 states to 7802 states and 20552 transitions. [2021-06-12 19:21:02,121 INFO L78 Accepts]: Start accepts. Automaton has 7802 states and 20552 transitions. Word has length 50 [2021-06-12 19:21:02,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:02,121 INFO L482 AbstractCegarLoop]: Abstraction has 7802 states and 20552 transitions. [2021-06-12 19:21:02,121 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) [2021-06-12 19:21:02,121 INFO L276 IsEmpty]: Start isEmpty. Operand 7802 states and 20552 transitions. [2021-06-12 19:21:02,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-06-12 19:21:02,126 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:02,126 INFO L472 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:02,326 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable559,275 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:02,327 INFO L430 AbstractCegarLoop]: === Iteration 284 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:02,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:02,327 INFO L82 PathProgramCache]: Analyzing trace with hash -1860539001, now seen corresponding path program 152 times [2021-06-12 19:21:02,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:02,327 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338362979] [2021-06-12 19:21:02,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:02,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:02,381 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-12 19:21:02,382 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:02,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338362979] [2021-06-12 19:21:02,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338362979] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:02,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483333701] [2021-06-12 19:21:02,382 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 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 [2021-06-12 19:21:02,408 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:21:02,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:21:02,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 19:21:02,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:02,473 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-12 19:21:02,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [483333701] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:02,473 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:02,473 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-06-12 19:21:02,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050224721] [2021-06-12 19:21:02,474 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 19:21:02,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:02,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 19:21:02,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-06-12 19:21:02,474 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) [2021-06-12 19:21:02,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:02,726 INFO L93 Difference]: Finished difference Result 8830 states and 22462 transitions. [2021-06-12 19:21:02,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:21:02,726 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 [2021-06-12 19:21:02,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:02,734 INFO L225 Difference]: With dead ends: 8830 [2021-06-12 19:21:02,735 INFO L226 Difference]: Without dead ends: 8773 [2021-06-12 19:21:02,735 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 44.4ms TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-06-12 19:21:02,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8773 states. [2021-06-12 19:21:02,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8773 to 7820. [2021-06-12 19:21:02,820 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) [2021-06-12 19:21:02,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7820 states to 7820 states and 20587 transitions. [2021-06-12 19:21:02,831 INFO L78 Accepts]: Start accepts. Automaton has 7820 states and 20587 transitions. Word has length 50 [2021-06-12 19:21:02,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:02,831 INFO L482 AbstractCegarLoop]: Abstraction has 7820 states and 20587 transitions. [2021-06-12 19:21:02,831 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) [2021-06-12 19:21:02,831 INFO L276 IsEmpty]: Start isEmpty. Operand 7820 states and 20587 transitions. [2021-06-12 19:21:02,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-06-12 19:21:02,836 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:02,836 INFO L472 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:03,036 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable560,276 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:03,036 INFO L430 AbstractCegarLoop]: === Iteration 285 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:03,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:03,036 INFO L82 PathProgramCache]: Analyzing trace with hash 1761499875, now seen corresponding path program 153 times [2021-06-12 19:21:03,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:03,036 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931002784] [2021-06-12 19:21:03,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:03,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:03,090 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-12 19:21:03,090 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:03,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931002784] [2021-06-12 19:21:03,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931002784] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:03,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750401029] [2021-06-12 19:21:03,091 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 [2021-06-12 19:21:03,120 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-06-12 19:21:03,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:21:03,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 19:21:03,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:03,183 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-12 19:21:03,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [750401029] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:03,184 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:03,184 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-06-12 19:21:03,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435751048] [2021-06-12 19:21:03,184 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 19:21:03,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:03,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 19:21:03,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-06-12 19:21:03,184 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) [2021-06-12 19:21:03,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:03,438 INFO L93 Difference]: Finished difference Result 8754 states and 22356 transitions. [2021-06-12 19:21:03,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:21:03,438 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 [2021-06-12 19:21:03,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:03,447 INFO L225 Difference]: With dead ends: 8754 [2021-06-12 19:21:03,447 INFO L226 Difference]: Without dead ends: 8694 [2021-06-12 19:21:03,448 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 43.9ms TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-06-12 19:21:03,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8694 states. [2021-06-12 19:21:03,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8694 to 7865. [2021-06-12 19:21:03,531 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) [2021-06-12 19:21:03,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7865 states to 7865 states and 20667 transitions. [2021-06-12 19:21:03,543 INFO L78 Accepts]: Start accepts. Automaton has 7865 states and 20667 transitions. Word has length 50 [2021-06-12 19:21:03,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:03,543 INFO L482 AbstractCegarLoop]: Abstraction has 7865 states and 20667 transitions. [2021-06-12 19:21:03,543 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) [2021-06-12 19:21:03,543 INFO L276 IsEmpty]: Start isEmpty. Operand 7865 states and 20667 transitions. [2021-06-12 19:21:03,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-06-12 19:21:03,548 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:03,548 INFO L472 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:03,748 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable561,277 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:03,749 INFO L430 AbstractCegarLoop]: === Iteration 286 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:03,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:03,749 INFO L82 PathProgramCache]: Analyzing trace with hash -836689913, now seen corresponding path program 154 times [2021-06-12 19:21:03,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:03,749 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23196495] [2021-06-12 19:21:03,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:03,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:03,805 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-12 19:21:03,805 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:03,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23196495] [2021-06-12 19:21:03,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23196495] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:03,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976260959] [2021-06-12 19:21:03,805 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 [2021-06-12 19:21:03,832 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:21:03,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:21:03,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 19:21:03,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:03,936 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-12 19:21:03,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976260959] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:03,936 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:03,936 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-06-12 19:21:03,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199091192] [2021-06-12 19:21:03,936 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 19:21:03,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:03,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 19:21:03,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-06-12 19:21:03,937 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) [2021-06-12 19:21:04,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:04,188 INFO L93 Difference]: Finished difference Result 8782 states and 22434 transitions. [2021-06-12 19:21:04,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:21:04,188 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 [2021-06-12 19:21:04,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:04,196 INFO L225 Difference]: With dead ends: 8782 [2021-06-12 19:21:04,196 INFO L226 Difference]: Without dead ends: 8744 [2021-06-12 19:21:04,196 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 44.7ms TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-06-12 19:21:04,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8744 states. [2021-06-12 19:21:04,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8744 to 7937. [2021-06-12 19:21:04,285 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) [2021-06-12 19:21:04,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7937 states to 7937 states and 20801 transitions. [2021-06-12 19:21:04,298 INFO L78 Accepts]: Start accepts. Automaton has 7937 states and 20801 transitions. Word has length 50 [2021-06-12 19:21:04,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:04,298 INFO L482 AbstractCegarLoop]: Abstraction has 7937 states and 20801 transitions. [2021-06-12 19:21:04,298 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) [2021-06-12 19:21:04,298 INFO L276 IsEmpty]: Start isEmpty. Operand 7937 states and 20801 transitions. [2021-06-12 19:21:04,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-06-12 19:21:04,303 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:04,303 INFO L472 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:04,504 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 278 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable562 [2021-06-12 19:21:04,504 INFO L430 AbstractCegarLoop]: === Iteration 287 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:04,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:04,504 INFO L82 PathProgramCache]: Analyzing trace with hash 391944291, now seen corresponding path program 155 times [2021-06-12 19:21:04,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:04,504 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957002911] [2021-06-12 19:21:04,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:04,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:04,559 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-12 19:21:04,559 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:04,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957002911] [2021-06-12 19:21:04,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957002911] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:04,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12399815] [2021-06-12 19:21:04,559 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 [2021-06-12 19:21:04,589 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-06-12 19:21:04,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:21:04,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 19:21:04,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:04,654 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-12 19:21:04,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [12399815] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:04,654 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:04,654 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-06-12 19:21:04,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009040232] [2021-06-12 19:21:04,655 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 19:21:04,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:04,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 19:21:04,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-06-12 19:21:04,655 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) [2021-06-12 19:21:04,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:04,910 INFO L93 Difference]: Finished difference Result 8848 states and 22578 transitions. [2021-06-12 19:21:04,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:21:04,910 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 [2021-06-12 19:21:04,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:04,918 INFO L225 Difference]: With dead ends: 8848 [2021-06-12 19:21:04,918 INFO L226 Difference]: Without dead ends: 8814 [2021-06-12 19:21:04,919 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 44.8ms TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-06-12 19:21:04,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8814 states. [2021-06-12 19:21:04,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8814 to 8036. [2021-06-12 19:21:04,993 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) [2021-06-12 19:21:05,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8036 states to 8036 states and 20989 transitions. [2021-06-12 19:21:05,003 INFO L78 Accepts]: Start accepts. Automaton has 8036 states and 20989 transitions. Word has length 50 [2021-06-12 19:21:05,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:05,003 INFO L482 AbstractCegarLoop]: Abstraction has 8036 states and 20989 transitions. [2021-06-12 19:21:05,004 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) [2021-06-12 19:21:05,004 INFO L276 IsEmpty]: Start isEmpty. Operand 8036 states and 20989 transitions. [2021-06-12 19:21:05,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-06-12 19:21:05,008 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:05,008 INFO L472 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:05,208 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable563,279 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:05,208 INFO L430 AbstractCegarLoop]: === Iteration 288 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:05,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:05,209 INFO L82 PathProgramCache]: Analyzing trace with hash 922219143, now seen corresponding path program 156 times [2021-06-12 19:21:05,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:05,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631138771] [2021-06-12 19:21:05,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:05,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:05,262 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-12 19:21:05,262 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:05,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631138771] [2021-06-12 19:21:05,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631138771] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:05,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511889194] [2021-06-12 19:21:05,263 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 [2021-06-12 19:21:05,292 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-06-12 19:21:05,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:21:05,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 19:21:05,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:05,355 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-12 19:21:05,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [511889194] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:05,355 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:05,356 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-06-12 19:21:05,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491122357] [2021-06-12 19:21:05,356 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 19:21:05,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:05,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 19:21:05,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-06-12 19:21:05,356 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) [2021-06-12 19:21:05,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:05,612 INFO L93 Difference]: Finished difference Result 9347 states and 23857 transitions. [2021-06-12 19:21:05,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:21:05,612 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-06-12 19:21:05,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:05,622 INFO L225 Difference]: With dead ends: 9347 [2021-06-12 19:21:05,622 INFO L226 Difference]: Without dead ends: 9311 [2021-06-12 19:21:05,622 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 43.4ms TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-06-12 19:21:05,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9311 states. [2021-06-12 19:21:05,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9311 to 8477. [2021-06-12 19:21:05,713 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) [2021-06-12 19:21:05,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8477 states to 8477 states and 22147 transitions. [2021-06-12 19:21:05,725 INFO L78 Accepts]: Start accepts. Automaton has 8477 states and 22147 transitions. Word has length 50 [2021-06-12 19:21:05,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:05,725 INFO L482 AbstractCegarLoop]: Abstraction has 8477 states and 22147 transitions. [2021-06-12 19:21:05,725 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) [2021-06-12 19:21:05,725 INFO L276 IsEmpty]: Start isEmpty. Operand 8477 states and 22147 transitions. [2021-06-12 19:21:05,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-06-12 19:21:05,730 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:05,730 INFO L472 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:05,930 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 280 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable564 [2021-06-12 19:21:05,931 INFO L430 AbstractCegarLoop]: === Iteration 289 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:05,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:05,931 INFO L82 PathProgramCache]: Analyzing trace with hash 1450620387, now seen corresponding path program 157 times [2021-06-12 19:21:05,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:05,931 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805682473] [2021-06-12 19:21:05,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:05,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:05,989 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-12 19:21:05,989 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:05,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805682473] [2021-06-12 19:21:05,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805682473] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:05,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080740784] [2021-06-12 19:21:05,989 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 [2021-06-12 19:21:06,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:06,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-12 19:21:06,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:06,079 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-12 19:21:06,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080740784] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:06,079 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:06,079 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-06-12 19:21:06,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187427666] [2021-06-12 19:21:06,079 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-12 19:21:06,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:06,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-12 19:21:06,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-06-12 19:21:06,080 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) [2021-06-12 19:21:06,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:06,336 INFO L93 Difference]: Finished difference Result 9828 states and 25051 transitions. [2021-06-12 19:21:06,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-12 19:21:06,336 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 [2021-06-12 19:21:06,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:06,347 INFO L225 Difference]: With dead ends: 9828 [2021-06-12 19:21:06,347 INFO L226 Difference]: Without dead ends: 9803 [2021-06-12 19:21:06,347 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 45.2ms TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-06-12 19:21:06,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9803 states. [2021-06-12 19:21:06,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9803 to 8967. [2021-06-12 19:21:06,483 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) [2021-06-12 19:21:06,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8967 states to 8967 states and 23365 transitions. [2021-06-12 19:21:06,496 INFO L78 Accepts]: Start accepts. Automaton has 8967 states and 23365 transitions. Word has length 50 [2021-06-12 19:21:06,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:06,496 INFO L482 AbstractCegarLoop]: Abstraction has 8967 states and 23365 transitions. [2021-06-12 19:21:06,496 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) [2021-06-12 19:21:06,496 INFO L276 IsEmpty]: Start isEmpty. Operand 8967 states and 23365 transitions. [2021-06-12 19:21:06,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-12 19:21:06,503 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:06,503 INFO L472 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:06,703 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 281 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable565 [2021-06-12 19:21:06,703 INFO L430 AbstractCegarLoop]: === Iteration 290 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:06,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:06,704 INFO L82 PathProgramCache]: Analyzing trace with hash -1040519320, now seen corresponding path program 74 times [2021-06-12 19:21:06,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:06,704 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116766665] [2021-06-12 19:21:06,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:06,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:06,847 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 7 proven. 127 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:06,848 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:06,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116766665] [2021-06-12 19:21:06,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116766665] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:06,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114842673] [2021-06-12 19:21:06,848 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 [2021-06-12 19:21:06,875 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:21:06,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:21:06,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:21:06,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:07,700 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:21:07,701 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 [2021-06-12 19:21:07,702 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:21:07,703 INFO L628 ElimStorePlain]: treesize reduction 19, result has 5.0 percent of original size [2021-06-12 19:21:07,704 INFO L518 ElimStorePlain]: Eliminatee B vanished before elimination [2021-06-12 19:21:07,704 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:21:07,704 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:27, output treesize:1 [2021-06-12 19:21:07,709 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 52 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:07,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [114842673] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:07,709 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:07,709 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19] total 34 [2021-06-12 19:21:07,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100663066] [2021-06-12 19:21:07,710 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-12 19:21:07,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:07,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-12 19:21:07,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1073, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 19:21:07,710 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) [2021-06-12 19:21:19,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:19,441 INFO L93 Difference]: Finished difference Result 20584 states and 47715 transitions. [2021-06-12 19:21:19,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 233 states. [2021-06-12 19:21:19,442 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 [2021-06-12 19:21:19,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:19,463 INFO L225 Difference]: With dead ends: 20584 [2021-06-12 19:21:19,463 INFO L226 Difference]: Without dead ends: 19760 [2021-06-12 19:21:19,466 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 252 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25560 ImplicationChecksByTransitivity, 10129.1ms TimeCoverageRelationStatistics Valid=7737, Invalid=56525, Unknown=0, NotChecked=0, Total=64262 [2021-06-12 19:21:19,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19760 states. [2021-06-12 19:21:19,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19760 to 9874. [2021-06-12 19:21:19,626 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) [2021-06-12 19:21:19,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9874 states to 9874 states and 26025 transitions. [2021-06-12 19:21:19,641 INFO L78 Accepts]: Start accepts. Automaton has 9874 states and 26025 transitions. Word has length 53 [2021-06-12 19:21:19,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:19,641 INFO L482 AbstractCegarLoop]: Abstraction has 9874 states and 26025 transitions. [2021-06-12 19:21:19,641 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) [2021-06-12 19:21:19,641 INFO L276 IsEmpty]: Start isEmpty. Operand 9874 states and 26025 transitions. [2021-06-12 19:21:19,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-12 19:21:19,648 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:19,648 INFO L472 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:19,848 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable566,282 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:19,848 INFO L430 AbstractCegarLoop]: === Iteration 291 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:19,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:19,849 INFO L82 PathProgramCache]: Analyzing trace with hash 1328551784, now seen corresponding path program 158 times [2021-06-12 19:21:19,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:19,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237161579] [2021-06-12 19:21:19,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:19,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:20,000 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 15 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:20,000 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:20,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237161579] [2021-06-12 19:21:20,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237161579] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:20,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313103233] [2021-06-12 19:21:20,000 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-12 19:21:20,033 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:21:20,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:21:20,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 19:21:20,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:20,300 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 13 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:20,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1313103233] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:20,300 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:20,300 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-06-12 19:21:20,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422847578] [2021-06-12 19:21:20,300 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 19:21:20,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:20,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 19:21:20,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:21:20,301 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) [2021-06-12 19:21:21,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:21,218 INFO L93 Difference]: Finished difference Result 10122 states and 26411 transitions. [2021-06-12 19:21:21,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:21:21,218 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 [2021-06-12 19:21:21,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:21,230 INFO L225 Difference]: With dead ends: 10122 [2021-06-12 19:21:21,230 INFO L226 Difference]: Without dead ends: 10030 [2021-06-12 19:21:21,230 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 275.7ms TimeCoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:21:21,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10030 states. [2021-06-12 19:21:21,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10030 to 9858. [2021-06-12 19:21:21,340 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) [2021-06-12 19:21:21,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9858 states to 9858 states and 25944 transitions. [2021-06-12 19:21:21,355 INFO L78 Accepts]: Start accepts. Automaton has 9858 states and 25944 transitions. Word has length 53 [2021-06-12 19:21:21,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:21,355 INFO L482 AbstractCegarLoop]: Abstraction has 9858 states and 25944 transitions. [2021-06-12 19:21:21,355 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) [2021-06-12 19:21:21,355 INFO L276 IsEmpty]: Start isEmpty. Operand 9858 states and 25944 transitions. [2021-06-12 19:21:21,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-12 19:21:21,362 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:21,362 INFO L472 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:21,562 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 283 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable575 [2021-06-12 19:21:21,562 INFO L430 AbstractCegarLoop]: === Iteration 292 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:21,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:21,563 INFO L82 PathProgramCache]: Analyzing trace with hash -1609870245, now seen corresponding path program 75 times [2021-06-12 19:21:21,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:21,563 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959229034] [2021-06-12 19:21:21,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:21,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:21,624 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 79 proven. 56 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:21:21,624 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:21,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959229034] [2021-06-12 19:21:21,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959229034] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:21,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624215119] [2021-06-12 19:21:21,624 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 [2021-06-12 19:21:21,654 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-12 19:21:21,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:21:21,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 19:21:21,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:21,788 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 80 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:21,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1624215119] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:21,788 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:21,788 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 11 [2021-06-12 19:21:21,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842588067] [2021-06-12 19:21:21,788 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 19:21:21,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:21,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 19:21:21,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:21:21,789 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) [2021-06-12 19:21:21,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:21,962 INFO L93 Difference]: Finished difference Result 13958 states and 35088 transitions. [2021-06-12 19:21:21,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:21:21,962 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 [2021-06-12 19:21:21,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:21,978 INFO L225 Difference]: With dead ends: 13958 [2021-06-12 19:21:21,978 INFO L226 Difference]: Without dead ends: 13958 [2021-06-12 19:21:21,978 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 67.0ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:21:21,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13958 states. [2021-06-12 19:21:22,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13958 to 10572. [2021-06-12 19:21:22,111 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) [2021-06-12 19:21:22,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10572 states to 10572 states and 28135 transitions. [2021-06-12 19:21:22,127 INFO L78 Accepts]: Start accepts. Automaton has 10572 states and 28135 transitions. Word has length 53 [2021-06-12 19:21:22,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:22,127 INFO L482 AbstractCegarLoop]: Abstraction has 10572 states and 28135 transitions. [2021-06-12 19:21:22,127 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) [2021-06-12 19:21:22,127 INFO L276 IsEmpty]: Start isEmpty. Operand 10572 states and 28135 transitions. [2021-06-12 19:21:22,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-12 19:21:22,135 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:22,135 INFO L472 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:22,335 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 284 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable576 [2021-06-12 19:21:22,335 INFO L430 AbstractCegarLoop]: === Iteration 293 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:22,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:22,336 INFO L82 PathProgramCache]: Analyzing trace with hash -2143735621, now seen corresponding path program 159 times [2021-06-12 19:21:22,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:22,336 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698179656] [2021-06-12 19:21:22,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:22,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:22,401 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 66 proven. 69 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:21:22,401 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:22,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698179656] [2021-06-12 19:21:22,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698179656] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:22,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671705489] [2021-06-12 19:21:22,401 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 [2021-06-12 19:21:22,433 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-12 19:21:22,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:21:22,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 19:21:22,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:22,513 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 66 proven. 69 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:21:22,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671705489] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:22,513 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:22,513 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-12 19:21:22,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449264533] [2021-06-12 19:21:22,513 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:21:22,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:22,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:21:22,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:21:22,514 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) [2021-06-12 19:21:22,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:22,662 INFO L93 Difference]: Finished difference Result 11271 states and 29322 transitions. [2021-06-12 19:21:22,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:21:22,662 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 [2021-06-12 19:21:22,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:22,674 INFO L225 Difference]: With dead ends: 11271 [2021-06-12 19:21:22,674 INFO L226 Difference]: Without dead ends: 11265 [2021-06-12 19:21:22,674 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 59.9ms TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:21:22,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11265 states. [2021-06-12 19:21:22,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11265 to 10496. [2021-06-12 19:21:22,784 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) [2021-06-12 19:21:22,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10496 states to 10496 states and 27896 transitions. [2021-06-12 19:21:22,800 INFO L78 Accepts]: Start accepts. Automaton has 10496 states and 27896 transitions. Word has length 53 [2021-06-12 19:21:22,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:22,800 INFO L482 AbstractCegarLoop]: Abstraction has 10496 states and 27896 transitions. [2021-06-12 19:21:22,800 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) [2021-06-12 19:21:22,800 INFO L276 IsEmpty]: Start isEmpty. Operand 10496 states and 27896 transitions. [2021-06-12 19:21:22,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-12 19:21:22,807 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:22,807 INFO L472 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:23,007 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 285 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable577 [2021-06-12 19:21:23,007 INFO L430 AbstractCegarLoop]: === Iteration 294 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:23,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:23,008 INFO L82 PathProgramCache]: Analyzing trace with hash 1194965254, now seen corresponding path program 76 times [2021-06-12 19:21:23,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:23,008 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157677775] [2021-06-12 19:21:23,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:23,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:23,090 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 8 proven. 123 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:21:23,090 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:23,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157677775] [2021-06-12 19:21:23,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157677775] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:23,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505652444] [2021-06-12 19:21:23,090 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 [2021-06-12 19:21:23,117 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:21:23,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:21:23,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 19:21:23,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:23,194 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 7 proven. 124 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:21:23,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1505652444] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:23,194 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:23,194 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-12 19:21:23,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925212866] [2021-06-12 19:21:23,195 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:21:23,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:23,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:21:23,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:21:23,195 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) [2021-06-12 19:21:23,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:23,589 INFO L93 Difference]: Finished difference Result 11930 states and 30766 transitions. [2021-06-12 19:21:23,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:21:23,589 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 [2021-06-12 19:21:23,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:23,602 INFO L225 Difference]: With dead ends: 11930 [2021-06-12 19:21:23,602 INFO L226 Difference]: Without dead ends: 11885 [2021-06-12 19:21:23,602 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 125.2ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:21:23,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11885 states. [2021-06-12 19:21:23,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11885 to 10613. [2021-06-12 19:21:23,730 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) [2021-06-12 19:21:23,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10613 states to 10613 states and 28189 transitions. [2021-06-12 19:21:23,746 INFO L78 Accepts]: Start accepts. Automaton has 10613 states and 28189 transitions. Word has length 53 [2021-06-12 19:21:23,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:23,746 INFO L482 AbstractCegarLoop]: Abstraction has 10613 states and 28189 transitions. [2021-06-12 19:21:23,746 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) [2021-06-12 19:21:23,746 INFO L276 IsEmpty]: Start isEmpty. Operand 10613 states and 28189 transitions. [2021-06-12 19:21:23,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-12 19:21:23,753 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:23,753 INFO L472 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:23,953 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable580,286 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:23,954 INFO L430 AbstractCegarLoop]: === Iteration 295 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:23,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:23,954 INFO L82 PathProgramCache]: Analyzing trace with hash -358731603, now seen corresponding path program 160 times [2021-06-12 19:21:23,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:23,954 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029913124] [2021-06-12 19:21:23,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:23,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:24,017 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 62 proven. 69 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-12 19:21:24,017 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:24,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029913124] [2021-06-12 19:21:24,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029913124] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:24,018 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422329971] [2021-06-12 19:21:24,018 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-12 19:21:24,045 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:21:24,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:21:24,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 19:21:24,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:24,119 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 62 proven. 69 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-12 19:21:24,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1422329971] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:24,119 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:24,119 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-12 19:21:24,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848054115] [2021-06-12 19:21:24,119 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 19:21:24,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:24,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 19:21:24,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:21:24,119 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) [2021-06-12 19:21:24,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:24,301 INFO L93 Difference]: Finished difference Result 11953 states and 30528 transitions. [2021-06-12 19:21:24,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:21:24,301 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 [2021-06-12 19:21:24,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:24,315 INFO L225 Difference]: With dead ends: 11953 [2021-06-12 19:21:24,315 INFO L226 Difference]: Without dead ends: 11950 [2021-06-12 19:21:24,315 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 57.6ms TimeCoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:21:24,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11950 states. [2021-06-12 19:21:24,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11950 to 10587. [2021-06-12 19:21:24,437 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) [2021-06-12 19:21:24,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10587 states to 10587 states and 28095 transitions. [2021-06-12 19:21:24,452 INFO L78 Accepts]: Start accepts. Automaton has 10587 states and 28095 transitions. Word has length 53 [2021-06-12 19:21:24,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:24,452 INFO L482 AbstractCegarLoop]: Abstraction has 10587 states and 28095 transitions. [2021-06-12 19:21:24,452 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) [2021-06-12 19:21:24,452 INFO L276 IsEmpty]: Start isEmpty. Operand 10587 states and 28095 transitions. [2021-06-12 19:21:24,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-12 19:21:24,459 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:24,459 INFO L472 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:24,659 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable581,287 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:24,659 INFO L430 AbstractCegarLoop]: === Iteration 296 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:24,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:24,659 INFO L82 PathProgramCache]: Analyzing trace with hash -151669037, now seen corresponding path program 161 times [2021-06-12 19:21:24,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:24,660 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20601544] [2021-06-12 19:21:24,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:24,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:24,724 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 59 proven. 72 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-12 19:21:24,724 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:24,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20601544] [2021-06-12 19:21:24,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20601544] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:24,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689224932] [2021-06-12 19:21:24,724 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 [2021-06-12 19:21:24,753 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-12 19:21:24,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:21:24,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 19:21:24,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:24,875 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 63 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:21:24,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [689224932] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:24,875 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:24,875 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14] total 16 [2021-06-12 19:21:24,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368246440] [2021-06-12 19:21:24,876 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:21:24,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:24,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:21:24,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:21:24,876 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) [2021-06-12 19:21:25,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:25,155 INFO L93 Difference]: Finished difference Result 12225 states and 31030 transitions. [2021-06-12 19:21:25,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 19:21:25,155 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 [2021-06-12 19:21:25,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:25,169 INFO L225 Difference]: With dead ends: 12225 [2021-06-12 19:21:25,170 INFO L226 Difference]: Without dead ends: 12207 [2021-06-12 19:21:25,170 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 110.1ms TimeCoverageRelationStatistics Valid=115, Invalid=265, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:21:25,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12207 states. [2021-06-12 19:21:25,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12207 to 10208. [2021-06-12 19:21:25,292 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) [2021-06-12 19:21:25,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10208 states to 10208 states and 26984 transitions. [2021-06-12 19:21:25,307 INFO L78 Accepts]: Start accepts. Automaton has 10208 states and 26984 transitions. Word has length 53 [2021-06-12 19:21:25,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:25,307 INFO L482 AbstractCegarLoop]: Abstraction has 10208 states and 26984 transitions. [2021-06-12 19:21:25,307 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) [2021-06-12 19:21:25,308 INFO L276 IsEmpty]: Start isEmpty. Operand 10208 states and 26984 transitions. [2021-06-12 19:21:25,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-12 19:21:25,315 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:25,315 INFO L472 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:25,515 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable583,288 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:25,515 INFO L430 AbstractCegarLoop]: === Iteration 297 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:25,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:25,515 INFO L82 PathProgramCache]: Analyzing trace with hash -1599669050, now seen corresponding path program 162 times [2021-06-12 19:21:25,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:25,516 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656076888] [2021-06-12 19:21:25,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:25,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:25,595 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 18 proven. 113 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:21:25,595 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:25,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656076888] [2021-06-12 19:21:25,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656076888] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:25,595 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910595892] [2021-06-12 19:21:25,597 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 [2021-06-12 19:21:25,627 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-06-12 19:21:25,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:21:25,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:21:25,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:25,833 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 19:21:25,833 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 [2021-06-12 19:21:25,834 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:21:25,840 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:21:25,840 INFO L518 ElimStorePlain]: Eliminatee B vanished before elimination [2021-06-12 19:21:25,841 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:21:25,841 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:27, output treesize:19 [2021-06-12 19:21:25,883 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 45 proven. 87 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:21:25,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [910595892] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:25,883 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:25,883 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12] total 20 [2021-06-12 19:21:25,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051179806] [2021-06-12 19:21:25,884 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 19:21:25,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:25,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 19:21:25,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:21:25,884 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) [2021-06-12 19:21:28,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:28,362 INFO L93 Difference]: Finished difference Result 13433 states and 33117 transitions. [2021-06-12 19:21:28,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2021-06-12 19:21:28,363 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 [2021-06-12 19:21:28,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:28,378 INFO L225 Difference]: With dead ends: 13433 [2021-06-12 19:21:28,378 INFO L226 Difference]: Without dead ends: 13411 [2021-06-12 19:21:28,378 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2987 ImplicationChecksByTransitivity, 1523.3ms TimeCoverageRelationStatistics Valid=1527, Invalid=7403, Unknown=0, NotChecked=0, Total=8930 [2021-06-12 19:21:28,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13411 states. [2021-06-12 19:21:28,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13411 to 10206. [2021-06-12 19:21:28,505 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) [2021-06-12 19:21:28,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10206 states to 10206 states and 26967 transitions. [2021-06-12 19:21:28,520 INFO L78 Accepts]: Start accepts. Automaton has 10206 states and 26967 transitions. Word has length 53 [2021-06-12 19:21:28,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:28,520 INFO L482 AbstractCegarLoop]: Abstraction has 10206 states and 26967 transitions. [2021-06-12 19:21:28,520 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) [2021-06-12 19:21:28,520 INFO L276 IsEmpty]: Start isEmpty. Operand 10206 states and 26967 transitions. [2021-06-12 19:21:28,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-12 19:21:28,527 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:28,527 INFO L472 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:28,727 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable586,289 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:28,727 INFO L430 AbstractCegarLoop]: === Iteration 298 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:28,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:28,728 INFO L82 PathProgramCache]: Analyzing trace with hash 2081762066, now seen corresponding path program 163 times [2021-06-12 19:21:28,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:28,728 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206023529] [2021-06-12 19:21:28,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:28,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:28,825 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 15 proven. 114 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-12 19:21:28,825 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:28,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206023529] [2021-06-12 19:21:28,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206023529] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:28,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633331854] [2021-06-12 19:21:28,825 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 [2021-06-12 19:21:28,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:28,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 19:21:28,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:28,932 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 115 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-12 19:21:28,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1633331854] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:28,932 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:28,932 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-12 19:21:28,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545700952] [2021-06-12 19:21:28,933 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:21:28,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:28,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:21:28,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:21:28,933 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) [2021-06-12 19:21:29,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:29,359 INFO L93 Difference]: Finished difference Result 11323 states and 29185 transitions. [2021-06-12 19:21:29,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:21:29,359 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 [2021-06-12 19:21:29,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:29,371 INFO L225 Difference]: With dead ends: 11323 [2021-06-12 19:21:29,371 INFO L226 Difference]: Without dead ends: 11323 [2021-06-12 19:21:29,372 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 138.6ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:21:29,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11323 states. [2021-06-12 19:21:29,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11323 to 10216. [2021-06-12 19:21:29,489 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) [2021-06-12 19:21:29,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10216 states to 10216 states and 26989 transitions. [2021-06-12 19:21:29,505 INFO L78 Accepts]: Start accepts. Automaton has 10216 states and 26989 transitions. Word has length 53 [2021-06-12 19:21:29,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:29,505 INFO L482 AbstractCegarLoop]: Abstraction has 10216 states and 26989 transitions. [2021-06-12 19:21:29,505 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) [2021-06-12 19:21:29,506 INFO L276 IsEmpty]: Start isEmpty. Operand 10216 states and 26989 transitions. [2021-06-12 19:21:29,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-12 19:21:29,513 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:29,514 INFO L472 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:29,714 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 290 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable587 [2021-06-12 19:21:29,714 INFO L430 AbstractCegarLoop]: === Iteration 299 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:29,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:29,714 INFO L82 PathProgramCache]: Analyzing trace with hash -71287896, now seen corresponding path program 164 times [2021-06-12 19:21:29,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:29,714 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992730060] [2021-06-12 19:21:29,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:29,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:29,797 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 119 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:21:29,797 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:29,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992730060] [2021-06-12 19:21:29,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992730060] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:29,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996626628] [2021-06-12 19:21:29,797 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 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 [2021-06-12 19:21:29,824 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:21:29,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:21:29,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 19:21:29,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:29,903 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 119 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:21:29,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1996626628] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:29,903 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:29,903 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-12 19:21:29,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228729124] [2021-06-12 19:21:29,903 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 19:21:29,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:29,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 19:21:29,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:21:29,904 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) [2021-06-12 19:21:30,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:30,431 INFO L93 Difference]: Finished difference Result 11942 states and 30505 transitions. [2021-06-12 19:21:30,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 19:21:30,431 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 [2021-06-12 19:21:30,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:30,444 INFO L225 Difference]: With dead ends: 11942 [2021-06-12 19:21:30,444 INFO L226 Difference]: Without dead ends: 11942 [2021-06-12 19:21:30,444 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 155.4ms TimeCoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:21:30,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11942 states. [2021-06-12 19:21:30,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11942 to 10248. [2021-06-12 19:21:30,574 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) [2021-06-12 19:21:30,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10248 states to 10248 states and 27064 transitions. [2021-06-12 19:21:30,591 INFO L78 Accepts]: Start accepts. Automaton has 10248 states and 27064 transitions. Word has length 53 [2021-06-12 19:21:30,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:30,591 INFO L482 AbstractCegarLoop]: Abstraction has 10248 states and 27064 transitions. [2021-06-12 19:21:30,591 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) [2021-06-12 19:21:30,591 INFO L276 IsEmpty]: Start isEmpty. Operand 10248 states and 27064 transitions. [2021-06-12 19:21:30,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-12 19:21:30,599 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:30,599 INFO L472 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:30,799 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable588,291 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:30,799 INFO L430 AbstractCegarLoop]: === Iteration 300 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:30,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:30,799 INFO L82 PathProgramCache]: Analyzing trace with hash -309349413, now seen corresponding path program 77 times [2021-06-12 19:21:30,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:30,800 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773995195] [2021-06-12 19:21:30,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:30,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:30,858 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 84 proven. 51 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:21:30,858 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:30,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773995195] [2021-06-12 19:21:30,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773995195] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:30,858 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359346792] [2021-06-12 19:21:30,858 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-12 19:21:30,890 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-06-12 19:21:30,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:21:30,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 19:21:30,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:30,982 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 85 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:30,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1359346792] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:30,982 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:30,982 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 13 [2021-06-12 19:21:30,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473100866] [2021-06-12 19:21:30,982 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:21:30,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:30,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:21:30,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:21:30,983 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) [2021-06-12 19:21:31,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:31,185 INFO L93 Difference]: Finished difference Result 13713 states and 34190 transitions. [2021-06-12 19:21:31,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:21:31,186 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 [2021-06-12 19:21:31,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:31,201 INFO L225 Difference]: With dead ends: 13713 [2021-06-12 19:21:31,201 INFO L226 Difference]: Without dead ends: 13705 [2021-06-12 19:21:31,202 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 80.5ms TimeCoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:21:31,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13705 states. [2021-06-12 19:21:31,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13705 to 10512. [2021-06-12 19:21:31,338 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) [2021-06-12 19:21:31,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10512 states to 10512 states and 27885 transitions. [2021-06-12 19:21:31,355 INFO L78 Accepts]: Start accepts. Automaton has 10512 states and 27885 transitions. Word has length 53 [2021-06-12 19:21:31,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:31,355 INFO L482 AbstractCegarLoop]: Abstraction has 10512 states and 27885 transitions. [2021-06-12 19:21:31,355 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) [2021-06-12 19:21:31,355 INFO L276 IsEmpty]: Start isEmpty. Operand 10512 states and 27885 transitions. [2021-06-12 19:21:31,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-12 19:21:31,363 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:31,363 INFO L472 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:31,563 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 292 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable589 [2021-06-12 19:21:31,564 INFO L430 AbstractCegarLoop]: === Iteration 301 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:31,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:31,564 INFO L82 PathProgramCache]: Analyzing trace with hash -931229823, now seen corresponding path program 78 times [2021-06-12 19:21:31,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:31,564 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724747084] [2021-06-12 19:21:31,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:31,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:31,662 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 84 proven. 50 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:21:31,662 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:31,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724747084] [2021-06-12 19:21:31,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724747084] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:31,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063064885] [2021-06-12 19:21:31,662 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 [2021-06-12 19:21:31,702 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-06-12 19:21:31,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:21:31,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 19:21:31,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:31,804 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 85 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:21:31,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1063064885] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:31,805 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:31,805 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 13 [2021-06-12 19:21:31,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630351116] [2021-06-12 19:21:31,805 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:21:31,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:31,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:21:31,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:21:31,806 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) [2021-06-12 19:21:32,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:32,027 INFO L93 Difference]: Finished difference Result 15140 states and 37466 transitions. [2021-06-12 19:21:32,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:21:32,027 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 [2021-06-12 19:21:32,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:32,042 INFO L225 Difference]: With dead ends: 15140 [2021-06-12 19:21:32,042 INFO L226 Difference]: Without dead ends: 15140 [2021-06-12 19:21:32,042 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 125.4ms TimeCoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:21:32,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15140 states. [2021-06-12 19:21:32,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15140 to 10520. [2021-06-12 19:21:32,177 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) [2021-06-12 19:21:32,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10520 states to 10520 states and 27904 transitions. [2021-06-12 19:21:32,194 INFO L78 Accepts]: Start accepts. Automaton has 10520 states and 27904 transitions. Word has length 53 [2021-06-12 19:21:32,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:32,194 INFO L482 AbstractCegarLoop]: Abstraction has 10520 states and 27904 transitions. [2021-06-12 19:21:32,194 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) [2021-06-12 19:21:32,194 INFO L276 IsEmpty]: Start isEmpty. Operand 10520 states and 27904 transitions. [2021-06-12 19:21:32,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-12 19:21:32,202 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:32,202 INFO L472 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:32,402 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable591,293 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:32,403 INFO L430 AbstractCegarLoop]: === Iteration 302 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:32,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:32,403 INFO L82 PathProgramCache]: Analyzing trace with hash 1726165017, now seen corresponding path program 79 times [2021-06-12 19:21:32,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:32,403 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878557314] [2021-06-12 19:21:32,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:32,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:32,479 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 80 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:21:32,479 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:32,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878557314] [2021-06-12 19:21:32,479 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878557314] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:32,479 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045549771] [2021-06-12 19:21:32,479 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 [2021-06-12 19:21:32,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:32,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 19:21:32,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:32,590 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 81 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:32,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2045549771] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:32,590 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:32,590 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 12 [2021-06-12 19:21:32,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751116922] [2021-06-12 19:21:32,591 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:21:32,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:32,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:21:32,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:21:32,591 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) [2021-06-12 19:21:32,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:32,818 INFO L93 Difference]: Finished difference Result 13839 states and 34594 transitions. [2021-06-12 19:21:32,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:21:32,818 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 [2021-06-12 19:21:32,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:32,834 INFO L225 Difference]: With dead ends: 13839 [2021-06-12 19:21:32,834 INFO L226 Difference]: Without dead ends: 13839 [2021-06-12 19:21:32,834 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 93.0ms TimeCoverageRelationStatistics Valid=94, Invalid=146, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:21:32,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13839 states. [2021-06-12 19:21:32,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13839 to 10344. [2021-06-12 19:21:32,968 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) [2021-06-12 19:21:32,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10344 states to 10344 states and 27366 transitions. [2021-06-12 19:21:32,984 INFO L78 Accepts]: Start accepts. Automaton has 10344 states and 27366 transitions. Word has length 53 [2021-06-12 19:21:32,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:32,984 INFO L482 AbstractCegarLoop]: Abstraction has 10344 states and 27366 transitions. [2021-06-12 19:21:32,984 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) [2021-06-12 19:21:32,984 INFO L276 IsEmpty]: Start isEmpty. Operand 10344 states and 27366 transitions. [2021-06-12 19:21:32,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-12 19:21:32,992 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:32,992 INFO L472 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:33,192 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable592,294 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:33,192 INFO L430 AbstractCegarLoop]: === Iteration 303 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:33,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:33,193 INFO L82 PathProgramCache]: Analyzing trace with hash 1133718440, now seen corresponding path program 80 times [2021-06-12 19:21:33,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:33,193 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334486801] [2021-06-12 19:21:33,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:33,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:33,277 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 22 proven. 111 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:21:33,277 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:33,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334486801] [2021-06-12 19:21:33,277 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334486801] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:33,277 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228450897] [2021-06-12 19:21:33,277 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 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 [2021-06-12 19:21:33,304 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:21:33,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:21:33,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 19:21:33,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:33,409 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 20 proven. 113 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:21:33,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [228450897] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:33,409 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:33,409 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-06-12 19:21:33,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933942488] [2021-06-12 19:21:33,409 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:21:33,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:33,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:21:33,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:21:33,410 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) [2021-06-12 19:21:34,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:34,037 INFO L93 Difference]: Finished difference Result 10977 states and 28511 transitions. [2021-06-12 19:21:34,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:21:34,037 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 [2021-06-12 19:21:34,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:34,049 INFO L225 Difference]: With dead ends: 10977 [2021-06-12 19:21:34,050 INFO L226 Difference]: Without dead ends: 10881 [2021-06-12 19:21:34,050 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 145.7ms TimeCoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:21:34,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10881 states. [2021-06-12 19:21:34,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10881 to 10343. [2021-06-12 19:21:34,164 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) [2021-06-12 19:21:34,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10343 states to 10343 states and 27352 transitions. [2021-06-12 19:21:34,180 INFO L78 Accepts]: Start accepts. Automaton has 10343 states and 27352 transitions. Word has length 53 [2021-06-12 19:21:34,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:34,180 INFO L482 AbstractCegarLoop]: Abstraction has 10343 states and 27352 transitions. [2021-06-12 19:21:34,180 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) [2021-06-12 19:21:34,180 INFO L276 IsEmpty]: Start isEmpty. Operand 10343 states and 27352 transitions. [2021-06-12 19:21:34,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-12 19:21:34,187 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:34,187 INFO L472 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:34,387 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable593,295 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:34,388 INFO L430 AbstractCegarLoop]: === Iteration 304 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:34,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:34,388 INFO L82 PathProgramCache]: Analyzing trace with hash 1461271213, now seen corresponding path program 165 times [2021-06-12 19:21:34,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:34,388 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101564878] [2021-06-12 19:21:34,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:34,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:34,456 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 61 proven. 74 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:21:34,457 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:34,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101564878] [2021-06-12 19:21:34,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101564878] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:34,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727363136] [2021-06-12 19:21:34,457 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 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 [2021-06-12 19:21:34,485 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-12 19:21:34,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:21:34,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 19:21:34,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:34,561 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 61 proven. 74 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:21:34,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1727363136] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:34,561 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:34,561 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-12 19:21:34,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216513315] [2021-06-12 19:21:34,561 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 19:21:34,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:34,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 19:21:34,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:21:34,562 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) [2021-06-12 19:21:34,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:34,744 INFO L93 Difference]: Finished difference Result 11313 states and 29024 transitions. [2021-06-12 19:21:34,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:21:34,745 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 [2021-06-12 19:21:34,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:34,757 INFO L225 Difference]: With dead ends: 11313 [2021-06-12 19:21:34,757 INFO L226 Difference]: Without dead ends: 11295 [2021-06-12 19:21:34,757 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 72.5ms TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:21:34,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11295 states. [2021-06-12 19:21:34,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11295 to 10343. [2021-06-12 19:21:34,872 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) [2021-06-12 19:21:34,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10343 states to 10343 states and 27342 transitions. [2021-06-12 19:21:34,888 INFO L78 Accepts]: Start accepts. Automaton has 10343 states and 27342 transitions. Word has length 53 [2021-06-12 19:21:34,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:34,888 INFO L482 AbstractCegarLoop]: Abstraction has 10343 states and 27342 transitions. [2021-06-12 19:21:34,888 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) [2021-06-12 19:21:34,888 INFO L276 IsEmpty]: Start isEmpty. Operand 10343 states and 27342 transitions. [2021-06-12 19:21:34,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-12 19:21:34,895 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:34,895 INFO L472 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:35,096 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable594,296 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:35,096 INFO L430 AbstractCegarLoop]: === Iteration 305 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:35,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:35,096 INFO L82 PathProgramCache]: Analyzing trace with hash -1403224534, now seen corresponding path program 81 times [2021-06-12 19:21:35,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:35,096 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273413075] [2021-06-12 19:21:35,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:35,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:35,178 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 8 proven. 123 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:21:35,178 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:35,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273413075] [2021-06-12 19:21:35,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273413075] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:35,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380561996] [2021-06-12 19:21:35,178 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 [2021-06-12 19:21:35,208 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-06-12 19:21:35,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:21:35,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 19:21:35,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:35,284 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 7 proven. 124 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:21:35,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1380561996] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:35,285 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:35,285 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-12 19:21:35,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887932605] [2021-06-12 19:21:35,285 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:21:35,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:35,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:21:35,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:21:35,285 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) [2021-06-12 19:21:35,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:35,748 INFO L93 Difference]: Finished difference Result 11804 states and 30259 transitions. [2021-06-12 19:21:35,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:21:35,748 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 [2021-06-12 19:21:35,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:35,761 INFO L225 Difference]: With dead ends: 11804 [2021-06-12 19:21:35,761 INFO L226 Difference]: Without dead ends: 11766 [2021-06-12 19:21:35,761 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 126.3ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:21:35,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11766 states. [2021-06-12 19:21:35,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11766 to 10492. [2021-06-12 19:21:35,883 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) [2021-06-12 19:21:35,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10492 states to 10492 states and 27719 transitions. [2021-06-12 19:21:35,900 INFO L78 Accepts]: Start accepts. Automaton has 10492 states and 27719 transitions. Word has length 53 [2021-06-12 19:21:35,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:35,900 INFO L482 AbstractCegarLoop]: Abstraction has 10492 states and 27719 transitions. [2021-06-12 19:21:35,901 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) [2021-06-12 19:21:35,901 INFO L276 IsEmpty]: Start isEmpty. Operand 10492 states and 27719 transitions. [2021-06-12 19:21:35,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-12 19:21:35,908 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:35,908 INFO L472 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:36,108 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 297 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable598 [2021-06-12 19:21:36,109 INFO L430 AbstractCegarLoop]: === Iteration 306 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:36,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:36,109 INFO L82 PathProgramCache]: Analyzing trace with hash 1338045905, now seen corresponding path program 166 times [2021-06-12 19:21:36,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:36,109 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062511259] [2021-06-12 19:21:36,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:36,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:36,160 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 52 proven. 79 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-12 19:21:36,160 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:36,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062511259] [2021-06-12 19:21:36,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1062511259] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:36,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175935202] [2021-06-12 19:21:36,160 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 [2021-06-12 19:21:36,186 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:21:36,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:21:36,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 19:21:36,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:36,261 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 52 proven. 79 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-12 19:21:36,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [175935202] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:36,262 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:36,262 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-12 19:21:36,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693465056] [2021-06-12 19:21:36,262 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 19:21:36,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:36,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 19:21:36,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:21:36,262 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) [2021-06-12 19:21:36,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:36,429 INFO L93 Difference]: Finished difference Result 12007 states and 30378 transitions. [2021-06-12 19:21:36,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:21:36,429 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 [2021-06-12 19:21:36,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:36,442 INFO L225 Difference]: With dead ends: 12007 [2021-06-12 19:21:36,442 INFO L226 Difference]: Without dead ends: 12004 [2021-06-12 19:21:36,442 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 46.9ms TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:21:36,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12004 states. [2021-06-12 19:21:36,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12004 to 10472. [2021-06-12 19:21:36,568 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) [2021-06-12 19:21:36,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10472 states to 10472 states and 27643 transitions. [2021-06-12 19:21:36,585 INFO L78 Accepts]: Start accepts. Automaton has 10472 states and 27643 transitions. Word has length 53 [2021-06-12 19:21:36,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:36,585 INFO L482 AbstractCegarLoop]: Abstraction has 10472 states and 27643 transitions. [2021-06-12 19:21:36,585 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) [2021-06-12 19:21:36,585 INFO L276 IsEmpty]: Start isEmpty. Operand 10472 states and 27643 transitions. [2021-06-12 19:21:36,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-12 19:21:36,593 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:36,593 INFO L472 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:36,793 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 298 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable599 [2021-06-12 19:21:36,794 INFO L430 AbstractCegarLoop]: === Iteration 307 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:36,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:36,794 INFO L82 PathProgramCache]: Analyzing trace with hash 1545108471, now seen corresponding path program 167 times [2021-06-12 19:21:36,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:36,794 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149750254] [2021-06-12 19:21:36,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:36,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:36,865 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 48 proven. 83 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-12 19:21:36,865 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:36,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149750254] [2021-06-12 19:21:36,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149750254] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:36,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231715651] [2021-06-12 19:21:36,865 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-12 19:21:36,908 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-06-12 19:21:36,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:21:36,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 19:21:36,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:37,024 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 52 proven. 83 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:21:37,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1231715651] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:37,025 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:37,025 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15 [2021-06-12 19:21:37,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858273110] [2021-06-12 19:21:37,025 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:21:37,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:37,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:21:37,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:21:37,025 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) [2021-06-12 19:21:37,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:37,340 INFO L93 Difference]: Finished difference Result 12244 states and 30811 transitions. [2021-06-12 19:21:37,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:21:37,340 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 [2021-06-12 19:21:37,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:37,353 INFO L225 Difference]: With dead ends: 12244 [2021-06-12 19:21:37,353 INFO L226 Difference]: Without dead ends: 12226 [2021-06-12 19:21:37,353 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 116.0ms TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:21:37,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12226 states. [2021-06-12 19:21:37,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12226 to 10472. [2021-06-12 19:21:37,473 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) [2021-06-12 19:21:37,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10472 states to 10472 states and 27619 transitions. [2021-06-12 19:21:37,490 INFO L78 Accepts]: Start accepts. Automaton has 10472 states and 27619 transitions. Word has length 53 [2021-06-12 19:21:37,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:37,490 INFO L482 AbstractCegarLoop]: Abstraction has 10472 states and 27619 transitions. [2021-06-12 19:21:37,490 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) [2021-06-12 19:21:37,490 INFO L276 IsEmpty]: Start isEmpty. Operand 10472 states and 27619 transitions. [2021-06-12 19:21:37,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-12 19:21:37,497 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:37,497 INFO L472 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:37,698 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable601,299 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:37,698 INFO L430 AbstractCegarLoop]: === Iteration 308 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:37,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:37,698 INFO L82 PathProgramCache]: Analyzing trace with hash 97108458, now seen corresponding path program 168 times [2021-06-12 19:21:37,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:37,698 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544266468] [2021-06-12 19:21:37,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:37,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:37,780 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 18 proven. 113 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:21:37,780 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:37,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544266468] [2021-06-12 19:21:37,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544266468] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:37,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410855268] [2021-06-12 19:21:37,780 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 [2021-06-12 19:21:37,810 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-06-12 19:21:37,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:21:37,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 19:21:37,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:37,951 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 13 proven. 118 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:21:37,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [410855268] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:37,951 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:37,951 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-12 19:21:37,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226904971] [2021-06-12 19:21:37,952 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:21:37,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:37,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:21:37,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:21:37,952 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) [2021-06-12 19:21:38,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:38,508 INFO L93 Difference]: Finished difference Result 11210 states and 28930 transitions. [2021-06-12 19:21:38,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:21:38,508 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 [2021-06-12 19:21:38,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:38,522 INFO L225 Difference]: With dead ends: 11210 [2021-06-12 19:21:38,522 INFO L226 Difference]: Without dead ends: 11154 [2021-06-12 19:21:38,522 INFO L728 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 [2021-06-12 19:21:38,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11154 states. [2021-06-12 19:21:38,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11154 to 10444. [2021-06-12 19:21:38,663 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) [2021-06-12 19:21:38,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10444 states to 10444 states and 27517 transitions. [2021-06-12 19:21:38,681 INFO L78 Accepts]: Start accepts. Automaton has 10444 states and 27517 transitions. Word has length 53 [2021-06-12 19:21:38,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:38,681 INFO L482 AbstractCegarLoop]: Abstraction has 10444 states and 27517 transitions. [2021-06-12 19:21:38,681 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) [2021-06-12 19:21:38,681 INFO L276 IsEmpty]: Start isEmpty. Operand 10444 states and 27517 transitions. [2021-06-12 19:21:38,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-12 19:21:38,689 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:38,689 INFO L472 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:38,889 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 300 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable604 [2021-06-12 19:21:38,889 INFO L430 AbstractCegarLoop]: === Iteration 309 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:38,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:38,889 INFO L82 PathProgramCache]: Analyzing trace with hash -516427722, now seen corresponding path program 169 times [2021-06-12 19:21:38,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:38,890 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809322163] [2021-06-12 19:21:38,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:38,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:38,971 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 15 proven. 114 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-12 19:21:38,972 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:38,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809322163] [2021-06-12 19:21:38,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809322163] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:38,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642338436] [2021-06-12 19:21:38,972 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 [2021-06-12 19:21:38,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:38,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 19:21:38,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:39,087 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 115 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-12 19:21:39,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [642338436] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:39,088 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:39,088 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-12 19:21:39,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7043172] [2021-06-12 19:21:39,088 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:21:39,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:39,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:21:39,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:21:39,088 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) [2021-06-12 19:21:39,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:39,550 INFO L93 Difference]: Finished difference Result 11584 states and 29771 transitions. [2021-06-12 19:21:39,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:21:39,551 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 [2021-06-12 19:21:39,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:39,562 INFO L225 Difference]: With dead ends: 11584 [2021-06-12 19:21:39,562 INFO L226 Difference]: Without dead ends: 11572 [2021-06-12 19:21:39,562 INFO L728 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 [2021-06-12 19:21:39,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11572 states. [2021-06-12 19:21:39,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11572 to 10490. [2021-06-12 19:21:39,671 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) [2021-06-12 19:21:39,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10490 states to 10490 states and 27620 transitions. [2021-06-12 19:21:39,688 INFO L78 Accepts]: Start accepts. Automaton has 10490 states and 27620 transitions. Word has length 53 [2021-06-12 19:21:39,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:39,688 INFO L482 AbstractCegarLoop]: Abstraction has 10490 states and 27620 transitions. [2021-06-12 19:21:39,689 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) [2021-06-12 19:21:39,689 INFO L276 IsEmpty]: Start isEmpty. Operand 10490 states and 27620 transitions. [2021-06-12 19:21:39,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-12 19:21:39,696 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:39,696 INFO L472 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:39,896 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable605,301 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:39,897 INFO L430 AbstractCegarLoop]: === Iteration 310 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:39,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:39,897 INFO L82 PathProgramCache]: Analyzing trace with hash 1625489612, now seen corresponding path program 170 times [2021-06-12 19:21:39,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:39,897 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31834881] [2021-06-12 19:21:39,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:39,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:39,977 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 15 proven. 116 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:21:39,977 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:39,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31834881] [2021-06-12 19:21:39,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31834881] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:39,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146987846] [2021-06-12 19:21:39,977 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 [2021-06-12 19:21:40,004 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:21:40,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:21:40,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 19:21:40,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:40,081 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 117 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:21:40,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146987846] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:40,082 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:40,082 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-12 19:21:40,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406048768] [2021-06-12 19:21:40,082 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 19:21:40,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:40,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 19:21:40,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:21:40,082 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) [2021-06-12 19:21:40,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:40,617 INFO L93 Difference]: Finished difference Result 12749 states and 32307 transitions. [2021-06-12 19:21:40,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 19:21:40,617 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 [2021-06-12 19:21:40,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:40,632 INFO L225 Difference]: With dead ends: 12749 [2021-06-12 19:21:40,632 INFO L226 Difference]: Without dead ends: 12707 [2021-06-12 19:21:40,632 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 170.0ms TimeCoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:21:40,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12707 states. [2021-06-12 19:21:40,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12707 to 10549. [2021-06-12 19:21:40,774 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) [2021-06-12 19:21:40,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10549 states to 10549 states and 27774 transitions. [2021-06-12 19:21:40,790 INFO L78 Accepts]: Start accepts. Automaton has 10549 states and 27774 transitions. Word has length 53 [2021-06-12 19:21:40,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:40,790 INFO L482 AbstractCegarLoop]: Abstraction has 10549 states and 27774 transitions. [2021-06-12 19:21:40,790 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) [2021-06-12 19:21:40,791 INFO L276 IsEmpty]: Start isEmpty. Operand 10549 states and 27774 transitions. [2021-06-12 19:21:40,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-12 19:21:40,797 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:40,797 INFO L472 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:40,998 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable606,302 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:40,998 INFO L430 AbstractCegarLoop]: === Iteration 311 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:40,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:40,998 INFO L82 PathProgramCache]: Analyzing trace with hash -1136918575, now seen corresponding path program 171 times [2021-06-12 19:21:40,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:40,998 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904272177] [2021-06-12 19:21:40,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:41,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:41,065 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 46 proven. 88 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:21:41,065 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:41,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904272177] [2021-06-12 19:21:41,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904272177] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:41,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658246444] [2021-06-12 19:21:41,065 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 [2021-06-12 19:21:41,094 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-12 19:21:41,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:21:41,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 19:21:41,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:41,170 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 46 proven. 88 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:21:41,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1658246444] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:41,170 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:41,170 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-12 19:21:41,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724559541] [2021-06-12 19:21:41,170 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 19:21:41,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:41,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 19:21:41,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:21:41,171 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) [2021-06-12 19:21:41,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:41,355 INFO L93 Difference]: Finished difference Result 12080 states and 30433 transitions. [2021-06-12 19:21:41,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:21:41,355 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 [2021-06-12 19:21:41,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:41,368 INFO L225 Difference]: With dead ends: 12080 [2021-06-12 19:21:41,368 INFO L226 Difference]: Without dead ends: 12056 [2021-06-12 19:21:41,368 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 78.9ms TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:21:41,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12056 states. [2021-06-12 19:21:41,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12056 to 10182. [2021-06-12 19:21:41,489 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) [2021-06-12 19:21:41,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10182 states to 10182 states and 26707 transitions. [2021-06-12 19:21:41,505 INFO L78 Accepts]: Start accepts. Automaton has 10182 states and 26707 transitions. Word has length 53 [2021-06-12 19:21:41,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:41,505 INFO L482 AbstractCegarLoop]: Abstraction has 10182 states and 26707 transitions. [2021-06-12 19:21:41,505 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) [2021-06-12 19:21:41,506 INFO L276 IsEmpty]: Start isEmpty. Operand 10182 states and 26707 transitions. [2021-06-12 19:21:41,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-12 19:21:41,513 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:41,513 INFO L472 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:41,713 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable607,303 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:41,713 INFO L430 AbstractCegarLoop]: === Iteration 312 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:41,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:41,714 INFO L82 PathProgramCache]: Analyzing trace with hash 1780326146, now seen corresponding path program 172 times [2021-06-12 19:21:41,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:41,714 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849366725] [2021-06-12 19:21:41,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:41,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:41,804 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 119 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:21:41,804 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:41,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849366725] [2021-06-12 19:21:41,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849366725] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:41,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172470316] [2021-06-12 19:21:41,805 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 [2021-06-12 19:21:41,831 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:21:41,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:21:41,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 19:21:41,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:41,908 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 119 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:21:41,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1172470316] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:41,908 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:41,908 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-12 19:21:41,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246533492] [2021-06-12 19:21:41,909 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:21:41,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:41,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:21:41,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:21:41,909 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) [2021-06-12 19:21:42,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:42,465 INFO L93 Difference]: Finished difference Result 12810 states and 32153 transitions. [2021-06-12 19:21:42,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 19:21:42,465 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 [2021-06-12 19:21:42,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:42,478 INFO L225 Difference]: With dead ends: 12810 [2021-06-12 19:21:42,478 INFO L226 Difference]: Without dead ends: 12756 [2021-06-12 19:21:42,478 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 187.7ms TimeCoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:21:42,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12756 states. [2021-06-12 19:21:42,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12756 to 10143. [2021-06-12 19:21:42,594 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) [2021-06-12 19:21:42,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10143 states to 10143 states and 26575 transitions. [2021-06-12 19:21:42,609 INFO L78 Accepts]: Start accepts. Automaton has 10143 states and 26575 transitions. Word has length 53 [2021-06-12 19:21:42,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:42,609 INFO L482 AbstractCegarLoop]: Abstraction has 10143 states and 26575 transitions. [2021-06-12 19:21:42,609 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) [2021-06-12 19:21:42,610 INFO L276 IsEmpty]: Start isEmpty. Operand 10143 states and 26575 transitions. [2021-06-12 19:21:42,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-12 19:21:42,617 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:42,617 INFO L472 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:42,817 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 304 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable611 [2021-06-12 19:21:42,817 INFO L430 AbstractCegarLoop]: === Iteration 313 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:42,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:42,818 INFO L82 PathProgramCache]: Analyzing trace with hash 1542264629, now seen corresponding path program 82 times [2021-06-12 19:21:42,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:42,818 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983361681] [2021-06-12 19:21:42,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:42,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:42,884 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 97 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:21:42,884 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:42,884 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983361681] [2021-06-12 19:21:42,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983361681] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:42,885 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357307055] [2021-06-12 19:21:42,885 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 [2021-06-12 19:21:42,911 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:21:42,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:21:42,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 19:21:42,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:42,990 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 98 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:42,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1357307055] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:42,990 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:42,990 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 11 [2021-06-12 19:21:42,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465121082] [2021-06-12 19:21:42,990 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 19:21:42,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:42,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 19:21:42,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:21:42,990 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) [2021-06-12 19:21:43,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:43,185 INFO L93 Difference]: Finished difference Result 13236 states and 32994 transitions. [2021-06-12 19:21:43,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:21:43,185 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 [2021-06-12 19:21:43,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:43,201 INFO L225 Difference]: With dead ends: 13236 [2021-06-12 19:21:43,201 INFO L226 Difference]: Without dead ends: 13222 [2021-06-12 19:21:43,201 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 72.2ms TimeCoverageRelationStatistics Valid=75, Invalid=107, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:21:43,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13222 states. [2021-06-12 19:21:43,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13222 to 10426. [2021-06-12 19:21:43,359 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) [2021-06-12 19:21:43,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10426 states to 10426 states and 27393 transitions. [2021-06-12 19:21:43,375 INFO L78 Accepts]: Start accepts. Automaton has 10426 states and 27393 transitions. Word has length 53 [2021-06-12 19:21:43,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:43,375 INFO L482 AbstractCegarLoop]: Abstraction has 10426 states and 27393 transitions. [2021-06-12 19:21:43,375 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) [2021-06-12 19:21:43,375 INFO L276 IsEmpty]: Start isEmpty. Operand 10426 states and 27393 transitions. [2021-06-12 19:21:43,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-12 19:21:43,383 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:43,383 INFO L472 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:43,583 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 305 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable612 [2021-06-12 19:21:43,583 INFO L430 AbstractCegarLoop]: === Iteration 314 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:43,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:43,584 INFO L82 PathProgramCache]: Analyzing trace with hash 920384219, now seen corresponding path program 83 times [2021-06-12 19:21:43,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:43,584 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623218945] [2021-06-12 19:21:43,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:43,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:43,641 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 97 proven. 37 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:21:43,641 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:43,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623218945] [2021-06-12 19:21:43,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623218945] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:43,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861945584] [2021-06-12 19:21:43,642 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 [2021-06-12 19:21:43,672 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-06-12 19:21:43,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:21:43,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 19:21:43,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:43,811 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 99 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:43,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [861945584] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:43,811 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:43,811 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 16] total 18 [2021-06-12 19:21:43,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683350376] [2021-06-12 19:21:43,811 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:21:43,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:43,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:21:43,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=215, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:21:43,811 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) [2021-06-12 19:21:44,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:44,199 INFO L93 Difference]: Finished difference Result 16570 states and 40721 transitions. [2021-06-12 19:21:44,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 19:21:44,199 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 [2021-06-12 19:21:44,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:44,216 INFO L225 Difference]: With dead ends: 16570 [2021-06-12 19:21:44,216 INFO L226 Difference]: Without dead ends: 16570 [2021-06-12 19:21:44,216 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 189.5ms TimeCoverageRelationStatistics Valid=240, Invalid=360, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:21:44,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16570 states. [2021-06-12 19:21:44,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16570 to 10440. [2021-06-12 19:21:44,357 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) [2021-06-12 19:21:44,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10440 states to 10440 states and 27430 transitions. [2021-06-12 19:21:44,373 INFO L78 Accepts]: Start accepts. Automaton has 10440 states and 27430 transitions. Word has length 53 [2021-06-12 19:21:44,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:44,373 INFO L482 AbstractCegarLoop]: Abstraction has 10440 states and 27430 transitions. [2021-06-12 19:21:44,373 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) [2021-06-12 19:21:44,373 INFO L276 IsEmpty]: Start isEmpty. Operand 10440 states and 27430 transitions. [2021-06-12 19:21:44,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-12 19:21:44,381 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:44,381 INFO L472 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:44,581 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable614,306 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:44,581 INFO L430 AbstractCegarLoop]: === Iteration 315 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:44,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:44,581 INFO L82 PathProgramCache]: Analyzing trace with hash -717188237, now seen corresponding path program 84 times [2021-06-12 19:21:44,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:44,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905629623] [2021-06-12 19:21:44,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:44,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:44,650 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 94 proven. 40 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:21:44,650 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:44,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905629623] [2021-06-12 19:21:44,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905629623] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:44,651 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278251979] [2021-06-12 19:21:44,651 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 [2021-06-12 19:21:44,680 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-06-12 19:21:44,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:21:44,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 19:21:44,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:44,779 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 104 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:21:44,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1278251979] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:44,780 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:44,780 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 14 [2021-06-12 19:21:44,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977079505] [2021-06-12 19:21:44,780 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:21:44,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:44,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:21:44,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=131, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:21:44,780 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) [2021-06-12 19:21:45,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:45,037 INFO L93 Difference]: Finished difference Result 13184 states and 32800 transitions. [2021-06-12 19:21:45,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:21:45,037 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 [2021-06-12 19:21:45,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:45,052 INFO L225 Difference]: With dead ends: 13184 [2021-06-12 19:21:45,052 INFO L226 Difference]: Without dead ends: 13184 [2021-06-12 19:21:45,052 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 109.0ms TimeCoverageRelationStatistics Valid=122, Invalid=184, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:21:45,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13184 states. [2021-06-12 19:21:45,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13184 to 10216. [2021-06-12 19:21:45,179 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) [2021-06-12 19:21:45,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10216 states to 10216 states and 26779 transitions. [2021-06-12 19:21:45,194 INFO L78 Accepts]: Start accepts. Automaton has 10216 states and 26779 transitions. Word has length 53 [2021-06-12 19:21:45,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:45,195 INFO L482 AbstractCegarLoop]: Abstraction has 10216 states and 26779 transitions. [2021-06-12 19:21:45,195 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) [2021-06-12 19:21:45,195 INFO L276 IsEmpty]: Start isEmpty. Operand 10216 states and 26779 transitions. [2021-06-12 19:21:45,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-12 19:21:45,202 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:45,202 INFO L472 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:45,402 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 307 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable615 [2021-06-12 19:21:45,402 INFO L430 AbstractCegarLoop]: === Iteration 316 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:45,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:45,403 INFO L82 PathProgramCache]: Analyzing trace with hash -2128038473, now seen corresponding path program 173 times [2021-06-12 19:21:45,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:45,403 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730846799] [2021-06-12 19:21:45,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:45,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:45,478 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 51 proven. 84 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:21:45,478 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:45,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730846799] [2021-06-12 19:21:45,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730846799] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:45,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324191569] [2021-06-12 19:21:45,478 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 [2021-06-12 19:21:45,506 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-06-12 19:21:45,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:21:45,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 19:21:45,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:45,613 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 52 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:45,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [324191569] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:45,614 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:45,614 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15] total 17 [2021-06-12 19:21:45,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241662674] [2021-06-12 19:21:45,614 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:21:45,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:45,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:21:45,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:21:45,614 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) [2021-06-12 19:21:45,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:45,918 INFO L93 Difference]: Finished difference Result 11730 states and 29482 transitions. [2021-06-12 19:21:45,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 19:21:45,918 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 [2021-06-12 19:21:45,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:45,929 INFO L225 Difference]: With dead ends: 11730 [2021-06-12 19:21:45,929 INFO L226 Difference]: Without dead ends: 11703 [2021-06-12 19:21:45,930 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 132.1ms TimeCoverageRelationStatistics Valid=121, Invalid=341, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:21:45,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11703 states. [2021-06-12 19:21:46,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11703 to 10216. [2021-06-12 19:21:46,042 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) [2021-06-12 19:21:46,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10216 states to 10216 states and 26770 transitions. [2021-06-12 19:21:46,057 INFO L78 Accepts]: Start accepts. Automaton has 10216 states and 26770 transitions. Word has length 53 [2021-06-12 19:21:46,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:46,057 INFO L482 AbstractCegarLoop]: Abstraction has 10216 states and 26770 transitions. [2021-06-12 19:21:46,057 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) [2021-06-12 19:21:46,057 INFO L276 IsEmpty]: Start isEmpty. Operand 10216 states and 26770 transitions. [2021-06-12 19:21:46,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-12 19:21:46,065 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:46,065 INFO L472 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:46,265 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable618,308 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:46,265 INFO L430 AbstractCegarLoop]: === Iteration 317 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:46,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:46,265 INFO L82 PathProgramCache]: Analyzing trace with hash -174590330, now seen corresponding path program 85 times [2021-06-12 19:21:46,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:46,265 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397564473] [2021-06-12 19:21:46,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:46,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:46,347 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 8 proven. 123 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:21:46,347 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:46,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397564473] [2021-06-12 19:21:46,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397564473] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:46,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477975664] [2021-06-12 19:21:46,347 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 [2021-06-12 19:21:46,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:46,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 19:21:46,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:46,451 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 7 proven. 124 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:21:46,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1477975664] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:46,451 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:46,451 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-12 19:21:46,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901806546] [2021-06-12 19:21:46,452 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:21:46,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:46,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:21:46,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:21:46,452 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) [2021-06-12 19:21:46,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:46,861 INFO L93 Difference]: Finished difference Result 11688 states and 29696 transitions. [2021-06-12 19:21:46,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:21:46,861 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 [2021-06-12 19:21:46,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:46,872 INFO L225 Difference]: With dead ends: 11688 [2021-06-12 19:21:46,872 INFO L226 Difference]: Without dead ends: 11657 [2021-06-12 19:21:46,873 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 125.8ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:21:46,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11657 states. [2021-06-12 19:21:46,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11657 to 10380. [2021-06-12 19:21:46,982 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) [2021-06-12 19:21:46,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10380 states to 10380 states and 27179 transitions. [2021-06-12 19:21:46,999 INFO L78 Accepts]: Start accepts. Automaton has 10380 states and 27179 transitions. Word has length 53 [2021-06-12 19:21:46,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:46,999 INFO L482 AbstractCegarLoop]: Abstraction has 10380 states and 27179 transitions. [2021-06-12 19:21:46,999 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:21:46,999 INFO L276 IsEmpty]: Start isEmpty. Operand 10380 states and 27179 transitions. [2021-06-12 19:21:47,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-12 19:21:47,007 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:47,007 INFO L472 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:47,207 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 309 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable623 [2021-06-12 19:21:47,207 INFO L430 AbstractCegarLoop]: === Iteration 318 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:47,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:47,208 INFO L82 PathProgramCache]: Analyzing trace with hash -1728287187, now seen corresponding path program 174 times [2021-06-12 19:21:47,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:47,208 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384482710] [2021-06-12 19:21:47,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:47,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:47,258 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 48 proven. 83 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-12 19:21:47,258 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:47,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384482710] [2021-06-12 19:21:47,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384482710] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:47,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310875261] [2021-06-12 19:21:47,258 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 [2021-06-12 19:21:47,287 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-06-12 19:21:47,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:21:47,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 19:21:47,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:47,361 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 48 proven. 83 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-12 19:21:47,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [310875261] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:47,361 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:47,361 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-12 19:21:47,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918109962] [2021-06-12 19:21:47,361 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 19:21:47,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:47,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 19:21:47,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:21:47,362 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) [2021-06-12 19:21:47,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:47,511 INFO L93 Difference]: Finished difference Result 12057 states and 30158 transitions. [2021-06-12 19:21:47,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:21:47,511 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 [2021-06-12 19:21:47,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:47,525 INFO L225 Difference]: With dead ends: 12057 [2021-06-12 19:21:47,525 INFO L226 Difference]: Without dead ends: 12054 [2021-06-12 19:21:47,525 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 45.6ms TimeCoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:21:47,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12054 states. [2021-06-12 19:21:47,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12054 to 10366. [2021-06-12 19:21:47,646 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) [2021-06-12 19:21:47,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10366 states to 10366 states and 27123 transitions. [2021-06-12 19:21:47,662 INFO L78 Accepts]: Start accepts. Automaton has 10366 states and 27123 transitions. Word has length 53 [2021-06-12 19:21:47,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:47,662 INFO L482 AbstractCegarLoop]: Abstraction has 10366 states and 27123 transitions. [2021-06-12 19:21:47,662 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) [2021-06-12 19:21:47,662 INFO L276 IsEmpty]: Start isEmpty. Operand 10366 states and 27123 transitions. [2021-06-12 19:21:47,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-12 19:21:47,669 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:47,670 INFO L472 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:47,870 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 310 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable624 [2021-06-12 19:21:47,870 INFO L430 AbstractCegarLoop]: === Iteration 319 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:47,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:47,870 INFO L82 PathProgramCache]: Analyzing trace with hash -1521224621, now seen corresponding path program 175 times [2021-06-12 19:21:47,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:47,870 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876495148] [2021-06-12 19:21:47,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:47,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:47,928 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 43 proven. 88 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-12 19:21:47,928 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:47,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876495148] [2021-06-12 19:21:47,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876495148] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:47,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076558649] [2021-06-12 19:21:47,929 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-12 19:21:47,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:47,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 19:21:47,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:48,030 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 43 proven. 88 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-12 19:21:48,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1076558649] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:48,031 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:48,031 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-12 19:21:48,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556940014] [2021-06-12 19:21:48,031 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:21:48,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:48,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:21:48,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:21:48,031 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) [2021-06-12 19:21:48,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:48,235 INFO L93 Difference]: Finished difference Result 12079 states and 30151 transitions. [2021-06-12 19:21:48,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:21:48,236 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 [2021-06-12 19:21:48,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:48,248 INFO L225 Difference]: With dead ends: 12079 [2021-06-12 19:21:48,249 INFO L226 Difference]: Without dead ends: 12061 [2021-06-12 19:21:48,249 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 69.8ms TimeCoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:21:48,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12061 states. [2021-06-12 19:21:48,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12061 to 10366. [2021-06-12 19:21:48,371 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) [2021-06-12 19:21:48,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10366 states to 10366 states and 27099 transitions. [2021-06-12 19:21:48,388 INFO L78 Accepts]: Start accepts. Automaton has 10366 states and 27099 transitions. Word has length 53 [2021-06-12 19:21:48,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:48,389 INFO L482 AbstractCegarLoop]: Abstraction has 10366 states and 27099 transitions. [2021-06-12 19:21:48,389 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) [2021-06-12 19:21:48,389 INFO L276 IsEmpty]: Start isEmpty. Operand 10366 states and 27099 transitions. [2021-06-12 19:21:48,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-12 19:21:48,396 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:48,396 INFO L472 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:48,597 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable626,311 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:48,597 INFO L430 AbstractCegarLoop]: === Iteration 320 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:48,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:48,597 INFO L82 PathProgramCache]: Analyzing trace with hash 1325742662, now seen corresponding path program 176 times [2021-06-12 19:21:48,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:48,597 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641857459] [2021-06-12 19:21:48,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:48,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:48,672 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 18 proven. 113 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:21:48,673 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:48,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641857459] [2021-06-12 19:21:48,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641857459] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:48,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260166692] [2021-06-12 19:21:48,673 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 [2021-06-12 19:21:48,701 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:21:48,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:21:48,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 19:21:48,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:48,791 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 13 proven. 118 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:21:48,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [260166692] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:48,791 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:48,792 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-12 19:21:48,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099217045] [2021-06-12 19:21:48,792 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:21:48,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:48,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:21:48,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:21:48,792 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) [2021-06-12 19:21:49,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:49,389 INFO L93 Difference]: Finished difference Result 11156 states and 28494 transitions. [2021-06-12 19:21:49,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:21:49,390 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 [2021-06-12 19:21:49,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:49,402 INFO L225 Difference]: With dead ends: 11156 [2021-06-12 19:21:49,402 INFO L226 Difference]: Without dead ends: 11082 [2021-06-12 19:21:49,402 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 124.2ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:21:49,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11082 states. [2021-06-12 19:21:49,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11082 to 10344. [2021-06-12 19:21:49,533 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) [2021-06-12 19:21:49,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10344 states to 10344 states and 26998 transitions. [2021-06-12 19:21:49,551 INFO L78 Accepts]: Start accepts. Automaton has 10344 states and 26998 transitions. Word has length 53 [2021-06-12 19:21:49,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:49,551 INFO L482 AbstractCegarLoop]: Abstraction has 10344 states and 26998 transitions. [2021-06-12 19:21:49,551 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) [2021-06-12 19:21:49,551 INFO L276 IsEmpty]: Start isEmpty. Operand 10344 states and 26998 transitions. [2021-06-12 19:21:49,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-12 19:21:49,559 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:49,560 INFO L472 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:49,760 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable629,312 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:49,760 INFO L430 AbstractCegarLoop]: === Iteration 321 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:49,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:49,760 INFO L82 PathProgramCache]: Analyzing trace with hash 712206482, now seen corresponding path program 177 times [2021-06-12 19:21:49,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:49,760 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595253145] [2021-06-12 19:21:49,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:49,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:49,842 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 15 proven. 114 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-12 19:21:49,842 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:49,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595253145] [2021-06-12 19:21:49,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595253145] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:49,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877538637] [2021-06-12 19:21:49,843 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 [2021-06-12 19:21:49,873 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-06-12 19:21:49,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:21:49,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 19:21:49,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:49,949 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 115 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-12 19:21:49,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [877538637] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:49,949 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:49,949 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-12 19:21:49,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204342373] [2021-06-12 19:21:49,950 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:21:49,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:49,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:21:49,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:21:49,950 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) [2021-06-12 19:21:50,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:50,367 INFO L93 Difference]: Finished difference Result 11598 states and 29476 transitions. [2021-06-12 19:21:50,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:21:50,368 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 [2021-06-12 19:21:50,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:50,380 INFO L225 Difference]: With dead ends: 11598 [2021-06-12 19:21:50,380 INFO L226 Difference]: Without dead ends: 11586 [2021-06-12 19:21:50,380 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 125.9ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:21:50,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11586 states. [2021-06-12 19:21:50,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11586 to 10414. [2021-06-12 19:21:50,496 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) [2021-06-12 19:21:50,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10414 states to 10414 states and 27165 transitions. [2021-06-12 19:21:50,513 INFO L78 Accepts]: Start accepts. Automaton has 10414 states and 27165 transitions. Word has length 53 [2021-06-12 19:21:50,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:50,513 INFO L482 AbstractCegarLoop]: Abstraction has 10414 states and 27165 transitions. [2021-06-12 19:21:50,513 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) [2021-06-12 19:21:50,513 INFO L276 IsEmpty]: Start isEmpty. Operand 10414 states and 27165 transitions. [2021-06-12 19:21:50,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-12 19:21:50,521 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:50,521 INFO L472 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:50,721 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 313 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable630 [2021-06-12 19:21:50,722 INFO L430 AbstractCegarLoop]: === Iteration 322 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:50,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:50,722 INFO L82 PathProgramCache]: Analyzing trace with hash -1440843480, now seen corresponding path program 178 times [2021-06-12 19:21:50,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:50,722 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362545294] [2021-06-12 19:21:50,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:50,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:50,803 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 15 proven. 116 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:21:50,803 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:50,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362545294] [2021-06-12 19:21:50,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [362545294] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:50,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446035988] [2021-06-12 19:21:50,803 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 [2021-06-12 19:21:50,830 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:21:50,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:21:50,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 19:21:50,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:50,958 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 117 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:21:50,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [446035988] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:50,958 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:50,958 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-12 19:21:50,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772823857] [2021-06-12 19:21:50,958 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 19:21:50,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:50,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 19:21:50,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:21:50,958 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) [2021-06-12 19:21:51,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:51,514 INFO L93 Difference]: Finished difference Result 13130 states and 32846 transitions. [2021-06-12 19:21:51,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 19:21:51,514 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 [2021-06-12 19:21:51,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:51,529 INFO L225 Difference]: With dead ends: 13130 [2021-06-12 19:21:51,529 INFO L226 Difference]: Without dead ends: 13076 [2021-06-12 19:21:51,529 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 189.6ms TimeCoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:21:51,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13076 states. [2021-06-12 19:21:51,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13076 to 10595. [2021-06-12 19:21:51,663 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) [2021-06-12 19:21:51,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10595 states to 10595 states and 27641 transitions. [2021-06-12 19:21:51,680 INFO L78 Accepts]: Start accepts. Automaton has 10595 states and 27641 transitions. Word has length 53 [2021-06-12 19:21:51,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:51,680 INFO L482 AbstractCegarLoop]: Abstraction has 10595 states and 27641 transitions. [2021-06-12 19:21:51,680 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) [2021-06-12 19:21:51,680 INFO L276 IsEmpty]: Start isEmpty. Operand 10595 states and 27641 transitions. [2021-06-12 19:21:51,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-12 19:21:51,687 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:51,687 INFO L472 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:51,888 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 314 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable631 [2021-06-12 19:21:51,888 INFO L430 AbstractCegarLoop]: === Iteration 323 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:51,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:51,888 INFO L82 PathProgramCache]: Analyzing trace with hash 91715629, now seen corresponding path program 179 times [2021-06-12 19:21:51,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:51,888 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511929876] [2021-06-12 19:21:51,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:51,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:51,954 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 38 proven. 96 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:21:51,954 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:51,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511929876] [2021-06-12 19:21:51,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [511929876] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:51,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113647505] [2021-06-12 19:21:51,955 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 [2021-06-12 19:21:51,984 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-06-12 19:21:51,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:21:51,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 19:21:51,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:52,084 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 39 proven. 96 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:21:52,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113647505] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:52,084 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:52,084 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 15 [2021-06-12 19:21:52,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832730289] [2021-06-12 19:21:52,085 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:21:52,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:52,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:21:52,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:21:52,085 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) [2021-06-12 19:21:52,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:52,338 INFO L93 Difference]: Finished difference Result 12473 states and 30997 transitions. [2021-06-12 19:21:52,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 19:21:52,339 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 [2021-06-12 19:21:52,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:52,353 INFO L225 Difference]: With dead ends: 12473 [2021-06-12 19:21:52,353 INFO L226 Difference]: Without dead ends: 12449 [2021-06-12 19:21:52,353 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 104.3ms TimeCoverageRelationStatistics Valid=98, Invalid=244, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:21:52,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12449 states. [2021-06-12 19:21:52,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12449 to 10595. [2021-06-12 19:21:52,481 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) [2021-06-12 19:21:52,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10595 states to 10595 states and 27624 transitions. [2021-06-12 19:21:52,497 INFO L78 Accepts]: Start accepts. Automaton has 10595 states and 27624 transitions. Word has length 53 [2021-06-12 19:21:52,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:52,497 INFO L482 AbstractCegarLoop]: Abstraction has 10595 states and 27624 transitions. [2021-06-12 19:21:52,497 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) [2021-06-12 19:21:52,497 INFO L276 IsEmpty]: Start isEmpty. Operand 10595 states and 27624 transitions. [2021-06-12 19:21:52,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-12 19:21:52,504 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:52,504 INFO L472 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:52,704 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable632,315 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:52,705 INFO L430 AbstractCegarLoop]: === Iteration 324 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:52,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:52,705 INFO L82 PathProgramCache]: Analyzing trace with hash -1286006946, now seen corresponding path program 180 times [2021-06-12 19:21:52,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:52,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2272635] [2021-06-12 19:21:52,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:52,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:52,795 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 15 proven. 116 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:21:52,795 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:52,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2272635] [2021-06-12 19:21:52,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2272635] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:52,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315030963] [2021-06-12 19:21:52,795 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-12 19:21:52,826 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-06-12 19:21:52,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:21:52,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 19:21:52,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:52,902 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 117 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:21:52,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315030963] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:52,903 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:52,903 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-12 19:21:52,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [838772103] [2021-06-12 19:21:52,903 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:21:52,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:52,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:21:52,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:21:52,903 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) [2021-06-12 19:21:53,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:53,683 INFO L93 Difference]: Finished difference Result 15502 states and 38128 transitions. [2021-06-12 19:21:53,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-12 19:21:53,683 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 [2021-06-12 19:21:53,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:53,697 INFO L225 Difference]: With dead ends: 15502 [2021-06-12 19:21:53,697 INFO L226 Difference]: Without dead ends: 15388 [2021-06-12 19:21:53,697 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 313.4ms TimeCoverageRelationStatistics Valid=177, Invalid=1155, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 19:21:53,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15388 states. [2021-06-12 19:21:53,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15388 to 10752. [2021-06-12 19:21:53,827 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) [2021-06-12 19:21:53,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10752 states to 10752 states and 28038 transitions. [2021-06-12 19:21:53,843 INFO L78 Accepts]: Start accepts. Automaton has 10752 states and 28038 transitions. Word has length 53 [2021-06-12 19:21:53,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:53,843 INFO L482 AbstractCegarLoop]: Abstraction has 10752 states and 28038 transitions. [2021-06-12 19:21:53,843 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) [2021-06-12 19:21:53,843 INFO L276 IsEmpty]: Start isEmpty. Operand 10752 states and 28038 transitions. [2021-06-12 19:21:53,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-12 19:21:53,851 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:53,851 INFO L472 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:54,051 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable636,316 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:54,051 INFO L430 AbstractCegarLoop]: === Iteration 325 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:54,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:54,051 INFO L82 PathProgramCache]: Analyzing trace with hash -899404269, now seen corresponding path program 181 times [2021-06-12 19:21:54,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:54,052 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963284945] [2021-06-12 19:21:54,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:54,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:54,130 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 39 proven. 95 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:21:54,130 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:54,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963284945] [2021-06-12 19:21:54,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963284945] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:54,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594124922] [2021-06-12 19:21:54,130 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 [2021-06-12 19:21:54,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:54,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 19:21:54,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:54,233 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 39 proven. 95 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:21:54,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [594124922] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:54,234 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:54,234 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-06-12 19:21:54,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946024086] [2021-06-12 19:21:54,234 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:21:54,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:54,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:21:54,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:21:54,234 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) [2021-06-12 19:21:54,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:54,474 INFO L93 Difference]: Finished difference Result 12521 states and 31155 transitions. [2021-06-12 19:21:54,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:21:54,475 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 [2021-06-12 19:21:54,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:54,488 INFO L225 Difference]: With dead ends: 12521 [2021-06-12 19:21:54,489 INFO L226 Difference]: Without dead ends: 12488 [2021-06-12 19:21:54,489 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 97.2ms TimeCoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:21:54,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12488 states. [2021-06-12 19:21:54,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12488 to 10400. [2021-06-12 19:21:54,612 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) [2021-06-12 19:21:54,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10400 states to 10400 states and 27035 transitions. [2021-06-12 19:21:54,629 INFO L78 Accepts]: Start accepts. Automaton has 10400 states and 27035 transitions. Word has length 53 [2021-06-12 19:21:54,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:54,629 INFO L482 AbstractCegarLoop]: Abstraction has 10400 states and 27035 transitions. [2021-06-12 19:21:54,629 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) [2021-06-12 19:21:54,629 INFO L276 IsEmpty]: Start isEmpty. Operand 10400 states and 27035 transitions. [2021-06-12 19:21:54,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-12 19:21:54,637 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:54,637 INFO L472 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:54,837 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable637,317 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:54,838 INFO L430 AbstractCegarLoop]: === Iteration 326 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:54,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:54,838 INFO L82 PathProgramCache]: Analyzing trace with hash -1345698456, now seen corresponding path program 182 times [2021-06-12 19:21:54,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:54,838 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730416199] [2021-06-12 19:21:54,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:54,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:54,937 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 119 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:21:54,937 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:54,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730416199] [2021-06-12 19:21:54,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730416199] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:54,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180561779] [2021-06-12 19:21:54,937 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 [2021-06-12 19:21:54,964 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:21:54,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:21:54,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 19:21:54,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:55,040 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 119 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:21:55,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [180561779] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:55,040 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:55,041 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-12 19:21:55,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866815348] [2021-06-12 19:21:55,041 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:21:55,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:55,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:21:55,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:21:55,041 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) [2021-06-12 19:21:55,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:55,646 INFO L93 Difference]: Finished difference Result 14179 states and 34868 transitions. [2021-06-12 19:21:55,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 19:21:55,646 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 [2021-06-12 19:21:55,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:55,663 INFO L225 Difference]: With dead ends: 14179 [2021-06-12 19:21:55,663 INFO L226 Difference]: Without dead ends: 14023 [2021-06-12 19:21:55,663 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 227.8ms TimeCoverageRelationStatistics Valid=107, Invalid=595, Unknown=0, NotChecked=0, Total=702 [2021-06-12 19:21:55,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14023 states. [2021-06-12 19:21:55,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14023 to 10040. [2021-06-12 19:21:55,788 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) [2021-06-12 19:21:55,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10040 states to 10040 states and 26030 transitions. [2021-06-12 19:21:55,802 INFO L78 Accepts]: Start accepts. Automaton has 10040 states and 26030 transitions. Word has length 53 [2021-06-12 19:21:55,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:55,802 INFO L482 AbstractCegarLoop]: Abstraction has 10040 states and 26030 transitions. [2021-06-12 19:21:55,803 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) [2021-06-12 19:21:55,803 INFO L276 IsEmpty]: Start isEmpty. Operand 10040 states and 26030 transitions. [2021-06-12 19:21:55,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-12 19:21:55,809 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:55,809 INFO L472 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:56,010 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 318 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable642 [2021-06-12 19:21:56,010 INFO L430 AbstractCegarLoop]: === Iteration 327 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:56,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:56,010 INFO L82 PathProgramCache]: Analyzing trace with hash -1583759973, now seen corresponding path program 86 times [2021-06-12 19:21:56,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:56,010 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216506619] [2021-06-12 19:21:56,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:56,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:56,066 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 104 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:21:56,066 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:56,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216506619] [2021-06-12 19:21:56,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216506619] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:56,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892055302] [2021-06-12 19:21:56,067 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 [2021-06-12 19:21:56,093 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:21:56,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:21:56,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 19:21:56,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:56,220 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 105 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:21:56,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [892055302] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:56,220 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:56,221 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 11 [2021-06-12 19:21:56,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113936270] [2021-06-12 19:21:56,221 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 19:21:56,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:56,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 19:21:56,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=78, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:21:56,221 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) [2021-06-12 19:21:56,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:56,418 INFO L93 Difference]: Finished difference Result 12926 states and 32056 transitions. [2021-06-12 19:21:56,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:21:56,418 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 [2021-06-12 19:21:56,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:56,434 INFO L225 Difference]: With dead ends: 12926 [2021-06-12 19:21:56,434 INFO L226 Difference]: Without dead ends: 12912 [2021-06-12 19:21:56,434 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 64.5ms TimeCoverageRelationStatistics Valid=74, Invalid=108, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:21:56,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12912 states. [2021-06-12 19:21:56,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12912 to 10415. [2021-06-12 19:21:56,570 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) [2021-06-12 19:21:56,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10415 states to 10415 states and 27102 transitions. [2021-06-12 19:21:56,588 INFO L78 Accepts]: Start accepts. Automaton has 10415 states and 27102 transitions. Word has length 53 [2021-06-12 19:21:56,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:56,588 INFO L482 AbstractCegarLoop]: Abstraction has 10415 states and 27102 transitions. [2021-06-12 19:21:56,588 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) [2021-06-12 19:21:56,588 INFO L276 IsEmpty]: Start isEmpty. Operand 10415 states and 27102 transitions. [2021-06-12 19:21:56,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-12 19:21:56,596 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:56,596 INFO L472 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:56,796 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 319 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable643 [2021-06-12 19:21:56,796 INFO L430 AbstractCegarLoop]: === Iteration 328 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:56,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:56,796 INFO L82 PathProgramCache]: Analyzing trace with hash 2089326913, now seen corresponding path program 87 times [2021-06-12 19:21:56,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:56,796 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972400263] [2021-06-12 19:21:56,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:56,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:56,855 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 104 proven. 30 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:21:56,855 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:56,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972400263] [2021-06-12 19:21:56,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972400263] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:56,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250546824] [2021-06-12 19:21:56,855 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 [2021-06-12 19:21:56,885 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-06-12 19:21:56,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:21:56,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 19:21:56,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:56,974 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 109 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:21:56,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1250546824] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:56,974 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:56,974 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 12 [2021-06-12 19:21:56,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232011569] [2021-06-12 19:21:56,974 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:21:56,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:56,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:21:56,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:21:56,975 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) [2021-06-12 19:21:57,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:57,269 INFO L93 Difference]: Finished difference Result 13428 states and 33227 transitions. [2021-06-12 19:21:57,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:21:57,269 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 [2021-06-12 19:21:57,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:57,283 INFO L225 Difference]: With dead ends: 13428 [2021-06-12 19:21:57,284 INFO L226 Difference]: Without dead ends: 13428 [2021-06-12 19:21:57,284 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 123.6ms TimeCoverageRelationStatistics Valid=144, Invalid=198, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:21:57,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13428 states. [2021-06-12 19:21:57,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13428 to 10022. [2021-06-12 19:21:57,413 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) [2021-06-12 19:21:57,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10022 states to 10022 states and 26006 transitions. [2021-06-12 19:21:57,428 INFO L78 Accepts]: Start accepts. Automaton has 10022 states and 26006 transitions. Word has length 53 [2021-06-12 19:21:57,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:57,428 INFO L482 AbstractCegarLoop]: Abstraction has 10022 states and 26006 transitions. [2021-06-12 19:21:57,428 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) [2021-06-12 19:21:57,428 INFO L276 IsEmpty]: Start isEmpty. Operand 10022 states and 26006 transitions. [2021-06-12 19:21:57,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-12 19:21:57,435 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:57,435 INFO L472 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:57,636 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 320 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable645 [2021-06-12 19:21:57,636 INFO L430 AbstractCegarLoop]: === Iteration 329 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:57,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:57,636 INFO L82 PathProgramCache]: Analyzing trace with hash 547874413, now seen corresponding path program 183 times [2021-06-12 19:21:57,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:57,636 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697153586] [2021-06-12 19:21:57,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:57,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:57,721 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 47 proven. 88 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:21:57,721 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:57,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697153586] [2021-06-12 19:21:57,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697153586] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:57,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914644552] [2021-06-12 19:21:57,722 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 [2021-06-12 19:21:57,750 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-12 19:21:57,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:21:57,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 19:21:57,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:57,826 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 47 proven. 88 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:21:57,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [914644552] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:57,826 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:57,826 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-06-12 19:21:57,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062138891] [2021-06-12 19:21:57,826 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:21:57,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:57,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:21:57,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:21:57,827 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) [2021-06-12 19:21:58,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:58,101 INFO L93 Difference]: Finished difference Result 11503 states and 28619 transitions. [2021-06-12 19:21:58,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:21:58,101 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 [2021-06-12 19:21:58,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:58,113 INFO L225 Difference]: With dead ends: 11503 [2021-06-12 19:21:58,113 INFO L226 Difference]: Without dead ends: 11467 [2021-06-12 19:21:58,113 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 116.7ms TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:21:58,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11467 states. [2021-06-12 19:21:58,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11467 to 10022. [2021-06-12 19:21:58,218 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) [2021-06-12 19:21:58,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10022 states to 10022 states and 25997 transitions. [2021-06-12 19:21:58,234 INFO L78 Accepts]: Start accepts. Automaton has 10022 states and 25997 transitions. Word has length 53 [2021-06-12 19:21:58,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:58,234 INFO L482 AbstractCegarLoop]: Abstraction has 10022 states and 25997 transitions. [2021-06-12 19:21:58,234 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) [2021-06-12 19:21:58,234 INFO L276 IsEmpty]: Start isEmpty. Operand 10022 states and 25997 transitions. [2021-06-12 19:21:58,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-12 19:21:58,240 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:58,240 INFO L472 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:58,440 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable648,321 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:21:58,441 INFO L430 AbstractCegarLoop]: === Iteration 330 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:58,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:58,441 INFO L82 PathProgramCache]: Analyzing trace with hash 355684522, now seen corresponding path program 88 times [2021-06-12 19:21:58,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:58,441 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689357300] [2021-06-12 19:21:58,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:58,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:58,526 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 8 proven. 123 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:21:58,526 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:58,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689357300] [2021-06-12 19:21:58,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689357300] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:58,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048513528] [2021-06-12 19:21:58,526 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 [2021-06-12 19:21:58,553 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:21:58,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:21:58,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 19:21:58,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:58,679 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 7 proven. 124 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:21:58,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2048513528] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:58,679 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:58,679 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-12 19:21:58,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700734314] [2021-06-12 19:21:58,679 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:21:58,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:58,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:21:58,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:21:58,680 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) [2021-06-12 19:21:59,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:59,103 INFO L93 Difference]: Finished difference Result 11456 states and 28845 transitions. [2021-06-12 19:21:59,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:21:59,103 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 [2021-06-12 19:21:59,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:59,115 INFO L225 Difference]: With dead ends: 11456 [2021-06-12 19:21:59,115 INFO L226 Difference]: Without dead ends: 11434 [2021-06-12 19:21:59,115 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 129.4ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:21:59,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11434 states. [2021-06-12 19:21:59,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11434 to 10210. [2021-06-12 19:21:59,231 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) [2021-06-12 19:21:59,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10210 states to 10210 states and 26461 transitions. [2021-06-12 19:21:59,247 INFO L78 Accepts]: Start accepts. Automaton has 10210 states and 26461 transitions. Word has length 53 [2021-06-12 19:21:59,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:59,247 INFO L482 AbstractCegarLoop]: Abstraction has 10210 states and 26461 transitions. [2021-06-12 19:21:59,247 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) [2021-06-12 19:21:59,247 INFO L276 IsEmpty]: Start isEmpty. Operand 10210 states and 26461 transitions. [2021-06-12 19:21:59,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-12 19:21:59,255 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:59,255 INFO L472 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:21:59,455 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 322 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable654 [2021-06-12 19:21:59,455 INFO L430 AbstractCegarLoop]: === Iteration 331 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:21:59,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:21:59,456 INFO L82 PathProgramCache]: Analyzing trace with hash -1198012335, now seen corresponding path program 184 times [2021-06-12 19:21:59,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:21:59,456 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729497259] [2021-06-12 19:21:59,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:21:59,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:21:59,508 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 50 proven. 81 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-12 19:21:59,508 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:21:59,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729497259] [2021-06-12 19:21:59,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729497259] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:59,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478626909] [2021-06-12 19:21:59,508 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 [2021-06-12 19:21:59,534 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:21:59,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:21:59,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 19:21:59,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:21:59,608 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 50 proven. 81 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-12 19:21:59,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1478626909] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:21:59,608 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:21:59,608 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-12 19:21:59,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903581830] [2021-06-12 19:21:59,608 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 19:21:59,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:21:59,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 19:21:59,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:21:59,609 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) [2021-06-12 19:21:59,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:21:59,756 INFO L93 Difference]: Finished difference Result 11989 states and 29653 transitions. [2021-06-12 19:21:59,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:21:59,756 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 [2021-06-12 19:21:59,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:21:59,769 INFO L225 Difference]: With dead ends: 11989 [2021-06-12 19:21:59,769 INFO L226 Difference]: Without dead ends: 11986 [2021-06-12 19:21:59,769 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 47.3ms TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:21:59,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11986 states. [2021-06-12 19:21:59,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11986 to 10202. [2021-06-12 19:21:59,889 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) [2021-06-12 19:21:59,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10202 states to 10202 states and 26425 transitions. [2021-06-12 19:21:59,904 INFO L78 Accepts]: Start accepts. Automaton has 10202 states and 26425 transitions. Word has length 53 [2021-06-12 19:21:59,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:21:59,904 INFO L482 AbstractCegarLoop]: Abstraction has 10202 states and 26425 transitions. [2021-06-12 19:21:59,904 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) [2021-06-12 19:21:59,904 INFO L276 IsEmpty]: Start isEmpty. Operand 10202 states and 26425 transitions. [2021-06-12 19:21:59,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-12 19:21:59,911 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:21:59,911 INFO L472 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:00,112 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable655,323 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:00,112 INFO L430 AbstractCegarLoop]: === Iteration 332 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:00,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:00,112 INFO L82 PathProgramCache]: Analyzing trace with hash -990949769, now seen corresponding path program 185 times [2021-06-12 19:22:00,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:00,112 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940118105] [2021-06-12 19:22:00,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:00,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:00,190 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 44 proven. 87 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-12 19:22:00,190 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:00,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940118105] [2021-06-12 19:22:00,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940118105] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:00,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846969689] [2021-06-12 19:22:00,190 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 [2021-06-12 19:22:00,229 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-06-12 19:22:00,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:22:00,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 19:22:00,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:22:00,340 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 48 proven. 87 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:22:00,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [846969689] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:00,341 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:00,341 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 13 [2021-06-12 19:22:00,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422784845] [2021-06-12 19:22:00,341 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:22:00,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:00,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:22:00,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:22:00,341 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) [2021-06-12 19:22:00,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:00,601 INFO L93 Difference]: Finished difference Result 12152 states and 29947 transitions. [2021-06-12 19:22:00,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:22:00,601 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 [2021-06-12 19:22:00,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:00,612 INFO L225 Difference]: With dead ends: 12152 [2021-06-12 19:22:00,612 INFO L226 Difference]: Without dead ends: 12134 [2021-06-12 19:22:00,612 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 113.4ms TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:22:00,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12134 states. [2021-06-12 19:22:00,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12134 to 10202. [2021-06-12 19:22:00,720 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) [2021-06-12 19:22:00,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10202 states to 10202 states and 26401 transitions. [2021-06-12 19:22:00,734 INFO L78 Accepts]: Start accepts. Automaton has 10202 states and 26401 transitions. Word has length 53 [2021-06-12 19:22:00,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:00,734 INFO L482 AbstractCegarLoop]: Abstraction has 10202 states and 26401 transitions. [2021-06-12 19:22:00,735 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) [2021-06-12 19:22:00,735 INFO L276 IsEmpty]: Start isEmpty. Operand 10202 states and 26401 transitions. [2021-06-12 19:22:00,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-12 19:22:00,742 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:00,742 INFO L472 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:00,942 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 324 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable657 [2021-06-12 19:22:00,942 INFO L430 AbstractCegarLoop]: === Iteration 333 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:00,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:00,942 INFO L82 PathProgramCache]: Analyzing trace with hash 1856017514, now seen corresponding path program 186 times [2021-06-12 19:22:00,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:00,943 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351558386] [2021-06-12 19:22:00,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:00,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:01,018 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 18 proven. 113 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:22:01,019 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:01,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351558386] [2021-06-12 19:22:01,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351558386] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:01,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638419442] [2021-06-12 19:22:01,019 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-12 19:22:01,050 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2021-06-12 19:22:01,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:22:01,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 19:22:01,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:22:01,144 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 13 proven. 118 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:22:01,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [638419442] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:01,144 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:01,144 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-12 19:22:01,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600577256] [2021-06-12 19:22:01,144 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:22:01,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:01,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:22:01,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:22:01,144 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) [2021-06-12 19:22:01,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:01,711 INFO L93 Difference]: Finished difference Result 11006 states and 27812 transitions. [2021-06-12 19:22:01,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:22:01,712 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 [2021-06-12 19:22:01,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:01,722 INFO L225 Difference]: With dead ends: 11006 [2021-06-12 19:22:01,722 INFO L226 Difference]: Without dead ends: 10914 [2021-06-12 19:22:01,722 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 124.6ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:22:01,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10914 states. [2021-06-12 19:22:01,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10914 to 10195. [2021-06-12 19:22:01,835 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) [2021-06-12 19:22:01,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10195 states to 10195 states and 26316 transitions. [2021-06-12 19:22:01,850 INFO L78 Accepts]: Start accepts. Automaton has 10195 states and 26316 transitions. Word has length 53 [2021-06-12 19:22:01,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:01,850 INFO L482 AbstractCegarLoop]: Abstraction has 10195 states and 26316 transitions. [2021-06-12 19:22:01,850 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) [2021-06-12 19:22:01,850 INFO L276 IsEmpty]: Start isEmpty. Operand 10195 states and 26316 transitions. [2021-06-12 19:22:01,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-12 19:22:01,858 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:01,858 INFO L472 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:02,058 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable660,325 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:02,058 INFO L430 AbstractCegarLoop]: === Iteration 334 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:02,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:02,059 INFO L82 PathProgramCache]: Analyzing trace with hash 1242481334, now seen corresponding path program 187 times [2021-06-12 19:22:02,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:02,059 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799129746] [2021-06-12 19:22:02,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:02,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:02,140 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 15 proven. 114 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-12 19:22:02,140 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:02,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799129746] [2021-06-12 19:22:02,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799129746] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:02,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412870419] [2021-06-12 19:22:02,140 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 [2021-06-12 19:22:02,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:02,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 19:22:02,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:22:02,243 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 115 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-12 19:22:02,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1412870419] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:02,243 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:02,243 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-12 19:22:02,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573460788] [2021-06-12 19:22:02,243 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:22:02,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:02,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:22:02,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:22:02,243 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) [2021-06-12 19:22:02,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:02,656 INFO L93 Difference]: Finished difference Result 11506 states and 28913 transitions. [2021-06-12 19:22:02,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:22:02,656 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 [2021-06-12 19:22:02,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:02,669 INFO L225 Difference]: With dead ends: 11506 [2021-06-12 19:22:02,670 INFO L226 Difference]: Without dead ends: 11494 [2021-06-12 19:22:02,670 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 126.1ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:22:02,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11494 states. [2021-06-12 19:22:02,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11494 to 10289. [2021-06-12 19:22:02,779 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) [2021-06-12 19:22:02,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10289 states to 10289 states and 26548 transitions. [2021-06-12 19:22:02,793 INFO L78 Accepts]: Start accepts. Automaton has 10289 states and 26548 transitions. Word has length 53 [2021-06-12 19:22:02,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:02,794 INFO L482 AbstractCegarLoop]: Abstraction has 10289 states and 26548 transitions. [2021-06-12 19:22:02,794 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) [2021-06-12 19:22:02,794 INFO L276 IsEmpty]: Start isEmpty. Operand 10289 states and 26548 transitions. [2021-06-12 19:22:02,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-12 19:22:02,800 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:02,800 INFO L472 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:03,001 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 326 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable661 [2021-06-12 19:22:03,001 INFO L430 AbstractCegarLoop]: === Iteration 335 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:03,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:03,001 INFO L82 PathProgramCache]: Analyzing trace with hash 1085181847, now seen corresponding path program 89 times [2021-06-12 19:22:03,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:03,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620270996] [2021-06-12 19:22:03,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:03,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:03,069 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 87 proven. 47 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:22:03,069 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:03,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620270996] [2021-06-12 19:22:03,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620270996] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:03,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142161114] [2021-06-12 19:22:03,069 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 [2021-06-12 19:22:03,100 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-06-12 19:22:03,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:22:03,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 19:22:03,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:22:03,192 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 89 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:03,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2142161114] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:03,192 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:03,192 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 13 [2021-06-12 19:22:03,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825711780] [2021-06-12 19:22:03,193 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:22:03,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:03,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:22:03,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:22:03,193 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) [2021-06-12 19:22:03,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:03,410 INFO L93 Difference]: Finished difference Result 12783 states and 31677 transitions. [2021-06-12 19:22:03,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:22:03,411 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 [2021-06-12 19:22:03,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:03,424 INFO L225 Difference]: With dead ends: 12783 [2021-06-12 19:22:03,424 INFO L226 Difference]: Without dead ends: 12763 [2021-06-12 19:22:03,424 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 94.0ms TimeCoverageRelationStatistics Valid=101, Invalid=171, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:22:03,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12763 states. [2021-06-12 19:22:03,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12763 to 10650. [2021-06-12 19:22:03,546 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) [2021-06-12 19:22:03,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10650 states to 10650 states and 27520 transitions. [2021-06-12 19:22:03,562 INFO L78 Accepts]: Start accepts. Automaton has 10650 states and 27520 transitions. Word has length 53 [2021-06-12 19:22:03,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:03,562 INFO L482 AbstractCegarLoop]: Abstraction has 10650 states and 27520 transitions. [2021-06-12 19:22:03,562 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) [2021-06-12 19:22:03,562 INFO L276 IsEmpty]: Start isEmpty. Operand 10650 states and 27520 transitions. [2021-06-12 19:22:03,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-12 19:22:03,570 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:03,570 INFO L472 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:03,770 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 327 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable662 [2021-06-12 19:22:03,770 INFO L430 AbstractCegarLoop]: === Iteration 336 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:03,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:03,771 INFO L82 PathProgramCache]: Analyzing trace with hash -910568628, now seen corresponding path program 188 times [2021-06-12 19:22:03,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:03,771 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846550801] [2021-06-12 19:22:03,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:03,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:03,902 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 15 proven. 116 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:22:03,903 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:03,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846550801] [2021-06-12 19:22:03,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846550801] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:03,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251903736] [2021-06-12 19:22:03,903 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 [2021-06-12 19:22:03,929 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:22:03,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:22:03,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 19:22:03,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:22:04,008 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 117 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:22:04,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1251903736] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:04,008 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:04,009 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-12 19:22:04,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465109575] [2021-06-12 19:22:04,009 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 19:22:04,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:04,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 19:22:04,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:22:04,009 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) [2021-06-12 19:22:04,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:04,612 INFO L93 Difference]: Finished difference Result 13521 states and 33551 transitions. [2021-06-12 19:22:04,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 19:22:04,613 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 [2021-06-12 19:22:04,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:04,626 INFO L225 Difference]: With dead ends: 13521 [2021-06-12 19:22:04,626 INFO L226 Difference]: Without dead ends: 13467 [2021-06-12 19:22:04,626 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 259.0ms TimeCoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2021-06-12 19:22:04,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13467 states. [2021-06-12 19:22:04,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13467 to 10945. [2021-06-12 19:22:04,756 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) [2021-06-12 19:22:04,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10945 states to 10945 states and 28310 transitions. [2021-06-12 19:22:04,772 INFO L78 Accepts]: Start accepts. Automaton has 10945 states and 28310 transitions. Word has length 53 [2021-06-12 19:22:04,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:04,772 INFO L482 AbstractCegarLoop]: Abstraction has 10945 states and 28310 transitions. [2021-06-12 19:22:04,772 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) [2021-06-12 19:22:04,772 INFO L276 IsEmpty]: Start isEmpty. Operand 10945 states and 28310 transitions. [2021-06-12 19:22:04,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-12 19:22:04,779 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:04,779 INFO L472 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:04,980 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable665,328 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:04,980 INFO L430 AbstractCegarLoop]: === Iteration 337 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:04,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:04,980 INFO L82 PathProgramCache]: Analyzing trace with hash 621990481, now seen corresponding path program 189 times [2021-06-12 19:22:04,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:04,980 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275987601] [2021-06-12 19:22:04,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:04,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:05,047 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 36 proven. 98 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:22:05,047 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:05,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275987601] [2021-06-12 19:22:05,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275987601] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:05,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897887440] [2021-06-12 19:22:05,047 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 [2021-06-12 19:22:05,077 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-06-12 19:22:05,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:22:05,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 19:22:05,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:22:05,152 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 36 proven. 98 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:22:05,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1897887440] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:05,152 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:05,152 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-12 19:22:05,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218689454] [2021-06-12 19:22:05,152 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 19:22:05,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:05,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 19:22:05,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:22:05,153 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) [2021-06-12 19:22:05,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:05,348 INFO L93 Difference]: Finished difference Result 12806 states and 31626 transitions. [2021-06-12 19:22:05,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:22:05,349 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 [2021-06-12 19:22:05,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:05,363 INFO L225 Difference]: With dead ends: 12806 [2021-06-12 19:22:05,363 INFO L226 Difference]: Without dead ends: 12782 [2021-06-12 19:22:05,363 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 78.3ms TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:22:05,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12782 states. [2021-06-12 19:22:05,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12782 to 10945. [2021-06-12 19:22:05,506 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) [2021-06-12 19:22:05,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10945 states to 10945 states and 28293 transitions. [2021-06-12 19:22:05,524 INFO L78 Accepts]: Start accepts. Automaton has 10945 states and 28293 transitions. Word has length 53 [2021-06-12 19:22:05,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:05,524 INFO L482 AbstractCegarLoop]: Abstraction has 10945 states and 28293 transitions. [2021-06-12 19:22:05,524 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) [2021-06-12 19:22:05,524 INFO L276 IsEmpty]: Start isEmpty. Operand 10945 states and 28293 transitions. [2021-06-12 19:22:05,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-12 19:22:05,532 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:05,532 INFO L472 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:05,732 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 329 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable666 [2021-06-12 19:22:05,733 INFO L430 AbstractCegarLoop]: === Iteration 338 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:05,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:05,733 INFO L82 PathProgramCache]: Analyzing trace with hash -755732094, now seen corresponding path program 190 times [2021-06-12 19:22:05,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:05,733 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498283465] [2021-06-12 19:22:05,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:05,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:05,826 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 15 proven. 116 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:22:05,826 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:05,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498283465] [2021-06-12 19:22:05,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498283465] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:05,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395793581] [2021-06-12 19:22:05,826 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 [2021-06-12 19:22:05,866 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:22:05,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:22:05,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 19:22:05,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:22:05,942 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 117 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:22:05,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1395793581] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:05,942 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:05,942 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-12 19:22:05,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36366638] [2021-06-12 19:22:05,942 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:22:05,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:05,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:22:05,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:22:05,943 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) [2021-06-12 19:22:06,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:06,857 INFO L93 Difference]: Finished difference Result 17261 states and 41917 transitions. [2021-06-12 19:22:06,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-12 19:22:06,858 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 [2021-06-12 19:22:06,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:06,876 INFO L225 Difference]: With dead ends: 17261 [2021-06-12 19:22:06,876 INFO L226 Difference]: Without dead ends: 17081 [2021-06-12 19:22:06,877 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 380.3ms TimeCoverageRelationStatistics Valid=225, Invalid=1581, Unknown=0, NotChecked=0, Total=1806 [2021-06-12 19:22:06,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17081 states. [2021-06-12 19:22:07,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17081 to 11484. [2021-06-12 19:22:07,027 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) [2021-06-12 19:22:07,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11484 states to 11484 states and 29700 transitions. [2021-06-12 19:22:07,045 INFO L78 Accepts]: Start accepts. Automaton has 11484 states and 29700 transitions. Word has length 53 [2021-06-12 19:22:07,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:07,045 INFO L482 AbstractCegarLoop]: Abstraction has 11484 states and 29700 transitions. [2021-06-12 19:22:07,045 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) [2021-06-12 19:22:07,045 INFO L276 IsEmpty]: Start isEmpty. Operand 11484 states and 29700 transitions. [2021-06-12 19:22:07,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-12 19:22:07,053 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:07,053 INFO L472 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:07,253 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable670,330 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:07,254 INFO L430 AbstractCegarLoop]: === Iteration 339 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:07,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:07,254 INFO L82 PathProgramCache]: Analyzing trace with hash -369129417, now seen corresponding path program 191 times [2021-06-12 19:22:07,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:07,254 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084429689] [2021-06-12 19:22:07,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:07,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:07,337 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 34 proven. 100 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:22:07,337 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:07,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084429689] [2021-06-12 19:22:07,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084429689] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:07,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693994364] [2021-06-12 19:22:07,337 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-12 19:22:07,366 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-06-12 19:22:07,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:22:07,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 19:22:07,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:22:07,459 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 34 proven. 100 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:22:07,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1693994364] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:07,459 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:07,459 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 15 [2021-06-12 19:22:07,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794766759] [2021-06-12 19:22:07,459 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:22:07,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:07,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:22:07,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:22:07,459 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) [2021-06-12 19:22:07,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:07,763 INFO L93 Difference]: Finished difference Result 13565 states and 33450 transitions. [2021-06-12 19:22:07,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 19:22:07,763 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 [2021-06-12 19:22:07,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:07,779 INFO L225 Difference]: With dead ends: 13565 [2021-06-12 19:22:07,779 INFO L226 Difference]: Without dead ends: 13532 [2021-06-12 19:22:07,779 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 123.0ms TimeCoverageRelationStatistics Valid=109, Invalid=271, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:22:07,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13532 states. [2021-06-12 19:22:07,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13532 to 11484. [2021-06-12 19:22:07,922 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) [2021-06-12 19:22:07,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11484 states to 11484 states and 29691 transitions. [2021-06-12 19:22:07,941 INFO L78 Accepts]: Start accepts. Automaton has 11484 states and 29691 transitions. Word has length 53 [2021-06-12 19:22:07,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:07,941 INFO L482 AbstractCegarLoop]: Abstraction has 11484 states and 29691 transitions. [2021-06-12 19:22:07,941 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) [2021-06-12 19:22:07,941 INFO L276 IsEmpty]: Start isEmpty. Operand 11484 states and 29691 transitions. [2021-06-12 19:22:07,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-12 19:22:07,950 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:07,950 INFO L472 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:08,150 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable671,331 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:08,150 INFO L430 AbstractCegarLoop]: === Iteration 340 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:08,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:08,150 INFO L82 PathProgramCache]: Analyzing trace with hash -815423604, now seen corresponding path program 192 times [2021-06-12 19:22:08,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:08,150 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700465402] [2021-06-12 19:22:08,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:08,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:08,249 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 15 proven. 116 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:22:08,250 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:08,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700465402] [2021-06-12 19:22:08,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700465402] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:08,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482078594] [2021-06-12 19:22:08,250 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 [2021-06-12 19:22:08,281 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2021-06-12 19:22:08,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:22:08,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 19:22:08,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:22:08,357 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 117 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:22:08,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1482078594] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:08,357 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:08,357 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-12 19:22:08,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134020281] [2021-06-12 19:22:08,357 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:22:08,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:08,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:22:08,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:22:08,358 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) [2021-06-12 19:22:09,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:09,599 INFO L93 Difference]: Finished difference Result 21447 states and 51505 transitions. [2021-06-12 19:22:09,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-12 19:22:09,600 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 [2021-06-12 19:22:09,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:09,625 INFO L225 Difference]: With dead ends: 21447 [2021-06-12 19:22:09,625 INFO L226 Difference]: Without dead ends: 21171 [2021-06-12 19:22:09,626 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1425 ImplicationChecksByTransitivity, 707.0ms TimeCoverageRelationStatistics Valid=495, Invalid=3927, Unknown=0, NotChecked=0, Total=4422 [2021-06-12 19:22:09,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21171 states. [2021-06-12 19:22:09,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21171 to 11987. [2021-06-12 19:22:09,819 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) [2021-06-12 19:22:09,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11987 states to 11987 states and 31007 transitions. [2021-06-12 19:22:09,837 INFO L78 Accepts]: Start accepts. Automaton has 11987 states and 31007 transitions. Word has length 53 [2021-06-12 19:22:09,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:09,837 INFO L482 AbstractCegarLoop]: Abstraction has 11987 states and 31007 transitions. [2021-06-12 19:22:09,837 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) [2021-06-12 19:22:09,837 INFO L276 IsEmpty]: Start isEmpty. Operand 11987 states and 31007 transitions. [2021-06-12 19:22:09,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-12 19:22:09,844 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:09,845 INFO L472 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:10,045 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable676,332 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:10,045 INFO L430 AbstractCegarLoop]: === Iteration 341 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:10,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:10,045 INFO L82 PathProgramCache]: Analyzing trace with hash 1078149265, now seen corresponding path program 193 times [2021-06-12 19:22:10,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:10,045 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572370091] [2021-06-12 19:22:10,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:10,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:10,132 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 38 proven. 96 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:22:10,132 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:10,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572370091] [2021-06-12 19:22:10,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572370091] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:10,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276919758] [2021-06-12 19:22:10,132 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 [2021-06-12 19:22:10,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:10,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 19:22:10,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:22:10,237 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 38 proven. 96 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:22:10,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [276919758] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:10,237 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:10,237 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-06-12 19:22:10,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943798444] [2021-06-12 19:22:10,237 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:22:10,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:10,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:22:10,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:22:10,238 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) [2021-06-12 19:22:10,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:10,498 INFO L93 Difference]: Finished difference Result 14020 states and 34646 transitions. [2021-06-12 19:22:10,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:22:10,498 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 [2021-06-12 19:22:10,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:10,515 INFO L225 Difference]: With dead ends: 14020 [2021-06-12 19:22:10,515 INFO L226 Difference]: Without dead ends: 13978 [2021-06-12 19:22:10,515 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 117.8ms TimeCoverageRelationStatistics Valid=110, Invalid=232, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:22:10,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13978 states. [2021-06-12 19:22:10,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13978 to 11653. [2021-06-12 19:22:10,659 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) [2021-06-12 19:22:10,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11653 states to 11653 states and 30074 transitions. [2021-06-12 19:22:10,677 INFO L78 Accepts]: Start accepts. Automaton has 11653 states and 30074 transitions. Word has length 53 [2021-06-12 19:22:10,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:10,677 INFO L482 AbstractCegarLoop]: Abstraction has 11653 states and 30074 transitions. [2021-06-12 19:22:10,677 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) [2021-06-12 19:22:10,677 INFO L276 IsEmpty]: Start isEmpty. Operand 11653 states and 30074 transitions. [2021-06-12 19:22:10,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-12 19:22:10,684 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:10,684 INFO L472 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:10,885 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 333 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable677 [2021-06-12 19:22:10,885 INFO L430 AbstractCegarLoop]: === Iteration 342 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:10,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:10,885 INFO L82 PathProgramCache]: Analyzing trace with hash -968737470, now seen corresponding path program 194 times [2021-06-12 19:22:10,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:10,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653927695] [2021-06-12 19:22:10,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:10,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:10,994 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 119 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:22:10,994 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:10,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653927695] [2021-06-12 19:22:10,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653927695] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:10,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829159154] [2021-06-12 19:22:10,994 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 [2021-06-12 19:22:11,021 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:22:11,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:22:11,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 19:22:11,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:22:11,096 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 119 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:22:11,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [829159154] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:11,097 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:11,097 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-12 19:22:11,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158517459] [2021-06-12 19:22:11,097 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:22:11,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:11,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:22:11,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:22:11,097 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) [2021-06-12 19:22:11,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:11,768 INFO L93 Difference]: Finished difference Result 16353 states and 39527 transitions. [2021-06-12 19:22:11,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 19:22:11,769 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 [2021-06-12 19:22:11,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:11,786 INFO L225 Difference]: With dead ends: 16353 [2021-06-12 19:22:11,787 INFO L226 Difference]: Without dead ends: 15975 [2021-06-12 19:22:11,787 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 275.5ms TimeCoverageRelationStatistics Valid=138, Invalid=732, Unknown=0, NotChecked=0, Total=870 [2021-06-12 19:22:11,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15975 states. [2021-06-12 19:22:11,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15975 to 10369. [2021-06-12 19:22:11,951 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) [2021-06-12 19:22:11,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10369 states to 10369 states and 26632 transitions. [2021-06-12 19:22:11,968 INFO L78 Accepts]: Start accepts. Automaton has 10369 states and 26632 transitions. Word has length 53 [2021-06-12 19:22:11,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:11,968 INFO L482 AbstractCegarLoop]: Abstraction has 10369 states and 26632 transitions. [2021-06-12 19:22:11,968 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) [2021-06-12 19:22:11,968 INFO L276 IsEmpty]: Start isEmpty. Operand 10369 states and 26632 transitions. [2021-06-12 19:22:11,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-12 19:22:11,976 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:11,976 INFO L472 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:12,176 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable683,334 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:12,176 INFO L430 AbstractCegarLoop]: === Iteration 343 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:12,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:12,177 INFO L82 PathProgramCache]: Analyzing trace with hash -1828679397, now seen corresponding path program 90 times [2021-06-12 19:22:12,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:12,177 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057107207] [2021-06-12 19:22:12,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:12,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:12,236 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 105 proven. 29 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:22:12,237 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:12,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057107207] [2021-06-12 19:22:12,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057107207] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:12,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940402430] [2021-06-12 19:22:12,237 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-12 19:22:12,268 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2021-06-12 19:22:12,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:22:12,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 19:22:12,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:22:12,351 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 106 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:22:12,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [940402430] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:12,352 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:12,352 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 11 [2021-06-12 19:22:12,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290102346] [2021-06-12 19:22:12,352 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 19:22:12,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:12,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 19:22:12,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=77, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:22:12,352 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) [2021-06-12 19:22:12,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:12,589 INFO L93 Difference]: Finished difference Result 15824 states and 38717 transitions. [2021-06-12 19:22:12,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 19:22:12,589 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 [2021-06-12 19:22:12,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:12,606 INFO L225 Difference]: With dead ends: 15824 [2021-06-12 19:22:12,607 INFO L226 Difference]: Without dead ends: 15824 [2021-06-12 19:22:12,607 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 94.3ms TimeCoverageRelationStatistics Valid=115, Invalid=157, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:22:12,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15824 states. [2021-06-12 19:22:12,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15824 to 10590. [2021-06-12 19:22:12,751 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) [2021-06-12 19:22:12,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10590 states to 10590 states and 27307 transitions. [2021-06-12 19:22:12,768 INFO L78 Accepts]: Start accepts. Automaton has 10590 states and 27307 transitions. Word has length 53 [2021-06-12 19:22:12,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:12,768 INFO L482 AbstractCegarLoop]: Abstraction has 10590 states and 27307 transitions. [2021-06-12 19:22:12,768 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) [2021-06-12 19:22:12,768 INFO L276 IsEmpty]: Start isEmpty. Operand 10590 states and 27307 transitions. [2021-06-12 19:22:12,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-12 19:22:12,776 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:12,776 INFO L472 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:12,976 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 335 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable684 [2021-06-12 19:22:12,977 INFO L430 AbstractCegarLoop]: === Iteration 344 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:12,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:12,977 INFO L82 PathProgramCache]: Analyzing trace with hash 828715443, now seen corresponding path program 91 times [2021-06-12 19:22:12,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:12,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666037496] [2021-06-12 19:22:12,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:12,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:13,045 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 104 proven. 30 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:22:13,045 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:13,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666037496] [2021-06-12 19:22:13,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666037496] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:13,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086045056] [2021-06-12 19:22:13,046 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 [2021-06-12 19:22:13,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:13,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 19:22:13,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:22:13,154 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 105 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:22:13,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2086045056] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:13,155 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:13,155 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 12 [2021-06-12 19:22:13,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904917896] [2021-06-12 19:22:13,155 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:22:13,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:13,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:22:13,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:22:13,155 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) [2021-06-12 19:22:13,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:13,511 INFO L93 Difference]: Finished difference Result 17337 states and 42262 transitions. [2021-06-12 19:22:13,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 19:22:13,512 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 [2021-06-12 19:22:13,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:13,530 INFO L225 Difference]: With dead ends: 17337 [2021-06-12 19:22:13,530 INFO L226 Difference]: Without dead ends: 17337 [2021-06-12 19:22:13,531 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 137.8ms TimeCoverageRelationStatistics Valid=184, Invalid=278, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:22:13,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17337 states. [2021-06-12 19:22:13,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17337 to 10630. [2021-06-12 19:22:13,677 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) [2021-06-12 19:22:13,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10630 states to 10630 states and 27426 transitions. [2021-06-12 19:22:13,693 INFO L78 Accepts]: Start accepts. Automaton has 10630 states and 27426 transitions. Word has length 53 [2021-06-12 19:22:13,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:13,693 INFO L482 AbstractCegarLoop]: Abstraction has 10630 states and 27426 transitions. [2021-06-12 19:22:13,693 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) [2021-06-12 19:22:13,693 INFO L276 IsEmpty]: Start isEmpty. Operand 10630 states and 27426 transitions. [2021-06-12 19:22:13,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-12 19:22:13,700 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:13,700 INFO L472 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:13,900 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable685,336 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:13,900 INFO L430 AbstractCegarLoop]: === Iteration 345 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:13,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:13,901 INFO L82 PathProgramCache]: Analyzing trace with hash -861279721, now seen corresponding path program 92 times [2021-06-12 19:22:13,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:13,901 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755794528] [2021-06-12 19:22:13,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:13,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:13,979 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 97 proven. 37 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:22:13,980 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:13,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755794528] [2021-06-12 19:22:13,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755794528] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:13,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802700923] [2021-06-12 19:22:13,980 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 [2021-06-12 19:22:14,006 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:22:14,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:22:14,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 19:22:14,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:22:14,090 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 98 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:22:14,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [802700923] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:14,091 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:14,091 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 13 [2021-06-12 19:22:14,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604954290] [2021-06-12 19:22:14,091 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:22:14,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:14,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:22:14,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:22:14,091 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) [2021-06-12 19:22:14,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:14,512 INFO L93 Difference]: Finished difference Result 17209 states and 41987 transitions. [2021-06-12 19:22:14,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 19:22:14,513 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 [2021-06-12 19:22:14,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:14,532 INFO L225 Difference]: With dead ends: 17209 [2021-06-12 19:22:14,533 INFO L226 Difference]: Without dead ends: 17209 [2021-06-12 19:22:14,533 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 194.9ms TimeCoverageRelationStatistics Valid=233, Invalid=367, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:22:14,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17209 states. [2021-06-12 19:22:14,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17209 to 10659. [2021-06-12 19:22:14,689 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) [2021-06-12 19:22:14,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10659 states to 10659 states and 27514 transitions. [2021-06-12 19:22:14,706 INFO L78 Accepts]: Start accepts. Automaton has 10659 states and 27514 transitions. Word has length 53 [2021-06-12 19:22:14,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:14,706 INFO L482 AbstractCegarLoop]: Abstraction has 10659 states and 27514 transitions. [2021-06-12 19:22:14,706 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) [2021-06-12 19:22:14,706 INFO L276 IsEmpty]: Start isEmpty. Operand 10659 states and 27514 transitions. [2021-06-12 19:22:14,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-12 19:22:14,713 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:14,713 INFO L472 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:14,914 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 337 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable686 [2021-06-12 19:22:14,914 INFO L430 AbstractCegarLoop]: === Iteration 346 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:14,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:14,914 INFO L82 PathProgramCache]: Analyzing trace with hash -1900566733, now seen corresponding path program 93 times [2021-06-12 19:22:14,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:14,914 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850098233] [2021-06-12 19:22:14,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:14,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:15,004 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 90 proven. 44 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:22:15,004 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:15,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850098233] [2021-06-12 19:22:15,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850098233] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:15,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334014191] [2021-06-12 19:22:15,004 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-12 19:22:15,035 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-06-12 19:22:15,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:22:15,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 19:22:15,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:22:15,171 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 112 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:22:15,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1334014191] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:15,171 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:15,171 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 18 [2021-06-12 19:22:15,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453744070] [2021-06-12 19:22:15,171 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:22:15,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:15,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:22:15,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=225, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:22:15,172 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) [2021-06-12 19:22:15,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:15,491 INFO L93 Difference]: Finished difference Result 12656 states and 31353 transitions. [2021-06-12 19:22:15,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 19:22:15,491 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 [2021-06-12 19:22:15,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:15,504 INFO L225 Difference]: With dead ends: 12656 [2021-06-12 19:22:15,504 INFO L226 Difference]: Without dead ends: 12656 [2021-06-12 19:22:15,504 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 183.8ms TimeCoverageRelationStatistics Valid=200, Invalid=352, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:22:15,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12656 states. [2021-06-12 19:22:15,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12656 to 10205. [2021-06-12 19:22:15,612 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) [2021-06-12 19:22:15,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10205 states to 10205 states and 26277 transitions. [2021-06-12 19:22:15,626 INFO L78 Accepts]: Start accepts. Automaton has 10205 states and 26277 transitions. Word has length 53 [2021-06-12 19:22:15,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:15,627 INFO L482 AbstractCegarLoop]: Abstraction has 10205 states and 26277 transitions. [2021-06-12 19:22:15,627 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) [2021-06-12 19:22:15,627 INFO L276 IsEmpty]: Start isEmpty. Operand 10205 states and 26277 transitions. [2021-06-12 19:22:15,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-12 19:22:15,633 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:15,633 INFO L472 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:15,833 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 338 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable687 [2021-06-12 19:22:15,834 INFO L430 AbstractCegarLoop]: === Iteration 347 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:15,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:15,834 INFO L82 PathProgramCache]: Analyzing trace with hash -219319817, now seen corresponding path program 195 times [2021-06-12 19:22:15,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:15,834 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371230932] [2021-06-12 19:22:15,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:15,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:15,930 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 49 proven. 86 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:22:15,930 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:15,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371230932] [2021-06-12 19:22:15,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371230932] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:15,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134984446] [2021-06-12 19:22:15,931 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 [2021-06-12 19:22:15,959 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-06-12 19:22:15,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:22:15,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 19:22:15,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:22:16,039 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 49 proven. 86 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:22:16,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [134984446] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:16,039 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:16,039 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-06-12 19:22:16,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563133040] [2021-06-12 19:22:16,039 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:22:16,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:16,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:22:16,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:22:16,040 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) [2021-06-12 19:22:16,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:16,270 INFO L93 Difference]: Finished difference Result 11763 states and 29051 transitions. [2021-06-12 19:22:16,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:22:16,270 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 [2021-06-12 19:22:16,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:16,281 INFO L225 Difference]: With dead ends: 11763 [2021-06-12 19:22:16,281 INFO L226 Difference]: Without dead ends: 11718 [2021-06-12 19:22:16,282 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 139.3ms TimeCoverageRelationStatistics Valid=131, Invalid=289, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:22:16,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11718 states. [2021-06-12 19:22:16,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11718 to 10205. [2021-06-12 19:22:16,398 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) [2021-06-12 19:22:16,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10205 states to 10205 states and 26268 transitions. [2021-06-12 19:22:16,414 INFO L78 Accepts]: Start accepts. Automaton has 10205 states and 26268 transitions. Word has length 53 [2021-06-12 19:22:16,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:16,414 INFO L482 AbstractCegarLoop]: Abstraction has 10205 states and 26268 transitions. [2021-06-12 19:22:16,414 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) [2021-06-12 19:22:16,414 INFO L276 IsEmpty]: Start isEmpty. Operand 10205 states and 26268 transitions. [2021-06-12 19:22:16,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-12 19:22:16,421 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:16,421 INFO L472 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:16,621 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable690,339 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:16,622 INFO L430 AbstractCegarLoop]: === Iteration 348 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:16,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:16,622 INFO L82 PathProgramCache]: Analyzing trace with hash 1122147283, now seen corresponding path program 196 times [2021-06-12 19:22:16,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:16,622 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203669350] [2021-06-12 19:22:16,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:16,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:16,676 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 43 proven. 88 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-12 19:22:16,676 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:16,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203669350] [2021-06-12 19:22:16,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203669350] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:16,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923053218] [2021-06-12 19:22:16,677 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 [2021-06-12 19:22:16,703 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:22:16,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:22:16,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 19:22:16,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:22:16,829 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 43 proven. 88 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-12 19:22:16,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1923053218] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:16,829 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:16,829 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-12 19:22:16,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479249846] [2021-06-12 19:22:16,829 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 19:22:16,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:16,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 19:22:16,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:22:16,829 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) [2021-06-12 19:22:16,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:16,976 INFO L93 Difference]: Finished difference Result 12506 states and 30816 transitions. [2021-06-12 19:22:16,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:22:16,977 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 [2021-06-12 19:22:16,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:16,990 INFO L225 Difference]: With dead ends: 12506 [2021-06-12 19:22:16,990 INFO L226 Difference]: Without dead ends: 12506 [2021-06-12 19:22:16,990 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 53.6ms TimeCoverageRelationStatistics Valid=48, Invalid=62, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:22:16,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12506 states. [2021-06-12 19:22:17,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12506 to 10409. [2021-06-12 19:22:17,119 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) [2021-06-12 19:22:17,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10409 states to 10409 states and 26914 transitions. [2021-06-12 19:22:17,137 INFO L78 Accepts]: Start accepts. Automaton has 10409 states and 26914 transitions. Word has length 53 [2021-06-12 19:22:17,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:17,137 INFO L482 AbstractCegarLoop]: Abstraction has 10409 states and 26914 transitions. [2021-06-12 19:22:17,137 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) [2021-06-12 19:22:17,137 INFO L276 IsEmpty]: Start isEmpty. Operand 10409 states and 26914 transitions. [2021-06-12 19:22:17,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-12 19:22:17,145 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:17,145 INFO L472 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:17,345 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 340 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable697 [2021-06-12 19:22:17,345 INFO L430 AbstractCegarLoop]: === Iteration 349 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:17,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:17,345 INFO L82 PathProgramCache]: Analyzing trace with hash 884085766, now seen corresponding path program 94 times [2021-06-12 19:22:17,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:17,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062466518] [2021-06-12 19:22:17,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:17,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:17,426 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 8 proven. 123 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:22:17,426 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:17,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062466518] [2021-06-12 19:22:17,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062466518] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:17,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330624387] [2021-06-12 19:22:17,426 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-12 19:22:17,456 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:22:17,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:22:17,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 19:22:17,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:22:17,532 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 7 proven. 124 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:22:17,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1330624387] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:17,532 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:17,532 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-12 19:22:17,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012592488] [2021-06-12 19:22:17,533 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:22:17,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:17,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:22:17,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:22:17,533 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) [2021-06-12 19:22:17,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:17,960 INFO L93 Difference]: Finished difference Result 11786 states and 29613 transitions. [2021-06-12 19:22:17,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:22:17,960 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 [2021-06-12 19:22:17,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:17,972 INFO L225 Difference]: With dead ends: 11786 [2021-06-12 19:22:17,973 INFO L226 Difference]: Without dead ends: 11771 [2021-06-12 19:22:17,973 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 124.7ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:22:17,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11771 states. [2021-06-12 19:22:18,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11771 to 10612. [2021-06-12 19:22:18,084 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) [2021-06-12 19:22:18,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10612 states to 10612 states and 27395 transitions. [2021-06-12 19:22:18,099 INFO L78 Accepts]: Start accepts. Automaton has 10612 states and 27395 transitions. Word has length 53 [2021-06-12 19:22:18,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:18,099 INFO L482 AbstractCegarLoop]: Abstraction has 10612 states and 27395 transitions. [2021-06-12 19:22:18,099 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) [2021-06-12 19:22:18,099 INFO L276 IsEmpty]: Start isEmpty. Operand 10612 states and 27395 transitions. [2021-06-12 19:22:18,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-12 19:22:18,106 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:18,106 INFO L472 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:18,306 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 341 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable698 [2021-06-12 19:22:18,307 INFO L430 AbstractCegarLoop]: === Iteration 350 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:18,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:18,307 INFO L82 PathProgramCache]: Analyzing trace with hash -669611091, now seen corresponding path program 197 times [2021-06-12 19:22:18,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:18,307 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590579928] [2021-06-12 19:22:18,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:18,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:18,359 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 58 proven. 74 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-12 19:22:18,360 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:18,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590579928] [2021-06-12 19:22:18,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590579928] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:18,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794620848] [2021-06-12 19:22:18,360 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 [2021-06-12 19:22:18,393 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-06-12 19:22:18,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:22:18,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 19:22:18,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:22:18,504 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 61 proven. 74 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:22:18,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [794620848] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:18,504 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:18,504 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12] total 12 [2021-06-12 19:22:18,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125389570] [2021-06-12 19:22:18,504 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:22:18,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:18,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:22:18,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:22:18,505 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) [2021-06-12 19:22:18,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:18,692 INFO L93 Difference]: Finished difference Result 12612 states and 31047 transitions. [2021-06-12 19:22:18,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:22:18,692 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 [2021-06-12 19:22:18,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:18,704 INFO L225 Difference]: With dead ends: 12612 [2021-06-12 19:22:18,705 INFO L226 Difference]: Without dead ends: 12609 [2021-06-12 19:22:18,705 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 66.2ms TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:22:18,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12609 states. [2021-06-12 19:22:18,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12609 to 10610. [2021-06-12 19:22:18,824 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) [2021-06-12 19:22:18,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10610 states to 10610 states and 27383 transitions. [2021-06-12 19:22:18,841 INFO L78 Accepts]: Start accepts. Automaton has 10610 states and 27383 transitions. Word has length 53 [2021-06-12 19:22:18,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:18,841 INFO L482 AbstractCegarLoop]: Abstraction has 10610 states and 27383 transitions. [2021-06-12 19:22:18,841 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) [2021-06-12 19:22:18,841 INFO L276 IsEmpty]: Start isEmpty. Operand 10610 states and 27383 transitions. [2021-06-12 19:22:18,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-12 19:22:18,848 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:18,848 INFO L472 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:19,049 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable699,342 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:19,049 INFO L430 AbstractCegarLoop]: === Iteration 351 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:19,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:19,049 INFO L82 PathProgramCache]: Analyzing trace with hash -462548525, now seen corresponding path program 198 times [2021-06-12 19:22:19,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:19,049 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763950143] [2021-06-12 19:22:19,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:19,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:19,109 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 51 proven. 80 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-12 19:22:19,109 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:19,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763950143] [2021-06-12 19:22:19,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763950143] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:19,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836797446] [2021-06-12 19:22:19,110 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 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 [2021-06-12 19:22:19,139 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-06-12 19:22:19,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:22:19,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 19:22:19,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:22:19,272 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 51 proven. 80 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-12 19:22:19,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1836797446] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:19,273 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:19,273 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-12 19:22:19,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589873652] [2021-06-12 19:22:19,273 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:22:19,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:19,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:22:19,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:22:19,273 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) [2021-06-12 19:22:19,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:19,445 INFO L93 Difference]: Finished difference Result 12493 states and 30763 transitions. [2021-06-12 19:22:19,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:22:19,445 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 [2021-06-12 19:22:19,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:19,459 INFO L225 Difference]: With dead ends: 12493 [2021-06-12 19:22:19,460 INFO L226 Difference]: Without dead ends: 12475 [2021-06-12 19:22:19,460 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 70.9ms TimeCoverageRelationStatistics Valid=74, Invalid=108, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:22:19,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12475 states. [2021-06-12 19:22:19,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12475 to 10610. [2021-06-12 19:22:19,595 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) [2021-06-12 19:22:19,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10610 states to 10610 states and 27360 transitions. [2021-06-12 19:22:19,612 INFO L78 Accepts]: Start accepts. Automaton has 10610 states and 27360 transitions. Word has length 53 [2021-06-12 19:22:19,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:19,612 INFO L482 AbstractCegarLoop]: Abstraction has 10610 states and 27360 transitions. [2021-06-12 19:22:19,612 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) [2021-06-12 19:22:19,612 INFO L276 IsEmpty]: Start isEmpty. Operand 10610 states and 27360 transitions. [2021-06-12 19:22:19,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-12 19:22:19,619 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:19,619 INFO L472 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:19,820 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 343 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable701 [2021-06-12 19:22:19,820 INFO L430 AbstractCegarLoop]: === Iteration 352 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:19,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:19,820 INFO L82 PathProgramCache]: Analyzing trace with hash -1910548538, now seen corresponding path program 199 times [2021-06-12 19:22:19,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:19,820 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266299691] [2021-06-12 19:22:19,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:19,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:19,895 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 18 proven. 113 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:22:19,895 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:19,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266299691] [2021-06-12 19:22:19,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266299691] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:19,895 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858362629] [2021-06-12 19:22:19,895 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 [2021-06-12 19:22:19,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:19,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 19:22:19,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:22:20,013 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 13 proven. 118 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:22:20,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [858362629] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:20,013 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:20,013 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-12 19:22:20,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134147930] [2021-06-12 19:22:20,013 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:22:20,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:20,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:22:20,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:22:20,014 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) [2021-06-12 19:22:20,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:20,577 INFO L93 Difference]: Finished difference Result 11446 states and 28816 transitions. [2021-06-12 19:22:20,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:22:20,577 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 [2021-06-12 19:22:20,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:20,589 INFO L225 Difference]: With dead ends: 11446 [2021-06-12 19:22:20,590 INFO L226 Difference]: Without dead ends: 11336 [2021-06-12 19:22:20,590 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 124.0ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:22:20,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11336 states. [2021-06-12 19:22:20,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11336 to 10627. [2021-06-12 19:22:20,706 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) [2021-06-12 19:22:20,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10627 states to 10627 states and 27306 transitions. [2021-06-12 19:22:20,722 INFO L78 Accepts]: Start accepts. Automaton has 10627 states and 27306 transitions. Word has length 53 [2021-06-12 19:22:20,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:20,722 INFO L482 AbstractCegarLoop]: Abstraction has 10627 states and 27306 transitions. [2021-06-12 19:22:20,722 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) [2021-06-12 19:22:20,722 INFO L276 IsEmpty]: Start isEmpty. Operand 10627 states and 27306 transitions. [2021-06-12 19:22:20,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-12 19:22:20,730 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:20,730 INFO L472 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:20,930 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable704,344 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:20,930 INFO L430 AbstractCegarLoop]: === Iteration 353 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:20,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:20,930 INFO L82 PathProgramCache]: Analyzing trace with hash 1770882578, now seen corresponding path program 200 times [2021-06-12 19:22:20,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:20,931 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084883690] [2021-06-12 19:22:20,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:20,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:21,011 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 15 proven. 114 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-12 19:22:21,011 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:21,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084883690] [2021-06-12 19:22:21,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084883690] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:21,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196255423] [2021-06-12 19:22:21,011 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 [2021-06-12 19:22:21,038 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:22:21,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:22:21,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 19:22:21,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:22:21,114 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 115 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-12 19:22:21,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1196255423] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:21,114 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:21,114 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-12 19:22:21,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504851462] [2021-06-12 19:22:21,114 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:22:21,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:21,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:22:21,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:22:21,115 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) [2021-06-12 19:22:21,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:21,529 INFO L93 Difference]: Finished difference Result 11964 states and 29958 transitions. [2021-06-12 19:22:21,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:22:21,529 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 [2021-06-12 19:22:21,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:21,542 INFO L225 Difference]: With dead ends: 11964 [2021-06-12 19:22:21,542 INFO L226 Difference]: Without dead ends: 11952 [2021-06-12 19:22:21,542 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 125.6ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:22:21,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11952 states. [2021-06-12 19:22:21,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11952 to 10745. [2021-06-12 19:22:21,700 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) [2021-06-12 19:22:21,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10745 states to 10745 states and 27602 transitions. [2021-06-12 19:22:21,716 INFO L78 Accepts]: Start accepts. Automaton has 10745 states and 27602 transitions. Word has length 53 [2021-06-12 19:22:21,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:21,716 INFO L482 AbstractCegarLoop]: Abstraction has 10745 states and 27602 transitions. [2021-06-12 19:22:21,716 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) [2021-06-12 19:22:21,717 INFO L276 IsEmpty]: Start isEmpty. Operand 10745 states and 27602 transitions. [2021-06-12 19:22:21,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-12 19:22:21,724 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:21,724 INFO L472 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:21,924 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 345 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable705 [2021-06-12 19:22:21,924 INFO L430 AbstractCegarLoop]: === Iteration 354 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:21,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:21,925 INFO L82 PathProgramCache]: Analyzing trace with hash -382167384, now seen corresponding path program 201 times [2021-06-12 19:22:21,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:21,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396685522] [2021-06-12 19:22:21,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:21,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:22,020 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 15 proven. 116 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:22:22,020 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:22,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396685522] [2021-06-12 19:22:22,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396685522] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:22,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452252681] [2021-06-12 19:22:22,020 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 [2021-06-12 19:22:22,060 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-06-12 19:22:22,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:22:22,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 19:22:22,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:22:22,153 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 117 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:22:22,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1452252681] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:22,153 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:22,153 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-12 19:22:22,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016583464] [2021-06-12 19:22:22,154 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 19:22:22,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:22,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 19:22:22,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:22:22,154 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) [2021-06-12 19:22:22,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:22,845 INFO L93 Difference]: Finished difference Result 13743 states and 33934 transitions. [2021-06-12 19:22:22,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-12 19:22:22,845 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 [2021-06-12 19:22:22,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:22,859 INFO L225 Difference]: With dead ends: 13743 [2021-06-12 19:22:22,859 INFO L226 Difference]: Without dead ends: 13689 [2021-06-12 19:22:22,859 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 251.4ms TimeCoverageRelationStatistics Valid=111, Invalid=701, Unknown=0, NotChecked=0, Total=812 [2021-06-12 19:22:22,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13689 states. [2021-06-12 19:22:22,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13689 to 11094. [2021-06-12 19:22:22,993 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) [2021-06-12 19:22:23,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11094 states to 11094 states and 28546 transitions. [2021-06-12 19:22:23,010 INFO L78 Accepts]: Start accepts. Automaton has 11094 states and 28546 transitions. Word has length 53 [2021-06-12 19:22:23,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:23,010 INFO L482 AbstractCegarLoop]: Abstraction has 11094 states and 28546 transitions. [2021-06-12 19:22:23,011 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) [2021-06-12 19:22:23,011 INFO L276 IsEmpty]: Start isEmpty. Operand 11094 states and 28546 transitions. [2021-06-12 19:22:23,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-12 19:22:23,018 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:23,018 INFO L472 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:23,218 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable706,346 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:23,219 INFO L430 AbstractCegarLoop]: === Iteration 355 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:23,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:23,219 INFO L82 PathProgramCache]: Analyzing trace with hash 1150391725, now seen corresponding path program 202 times [2021-06-12 19:22:23,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:23,219 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933473354] [2021-06-12 19:22:23,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:23,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:23,287 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 40 proven. 94 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:22:23,287 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:23,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933473354] [2021-06-12 19:22:23,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1933473354] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:23,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26112279] [2021-06-12 19:22:23,288 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 [2021-06-12 19:22:23,314 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:22:23,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:22:23,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 19:22:23,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:22:23,388 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 40 proven. 94 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:22:23,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [26112279] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:23,388 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:23,388 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-12 19:22:23,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957988531] [2021-06-12 19:22:23,389 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 19:22:23,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:23,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 19:22:23,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:22:23,389 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) [2021-06-12 19:22:23,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:23,560 INFO L93 Difference]: Finished difference Result 13092 states and 32135 transitions. [2021-06-12 19:22:23,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:22:23,560 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 [2021-06-12 19:22:23,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:23,572 INFO L225 Difference]: With dead ends: 13092 [2021-06-12 19:22:23,572 INFO L226 Difference]: Without dead ends: 13068 [2021-06-12 19:22:23,573 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 79.8ms TimeCoverageRelationStatistics Valid=77, Invalid=133, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:22:23,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13068 states. [2021-06-12 19:22:23,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13068 to 11094. [2021-06-12 19:22:23,708 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) [2021-06-12 19:22:23,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11094 states to 11094 states and 28529 transitions. [2021-06-12 19:22:23,725 INFO L78 Accepts]: Start accepts. Automaton has 11094 states and 28529 transitions. Word has length 53 [2021-06-12 19:22:23,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:23,725 INFO L482 AbstractCegarLoop]: Abstraction has 11094 states and 28529 transitions. [2021-06-12 19:22:23,726 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) [2021-06-12 19:22:23,726 INFO L276 IsEmpty]: Start isEmpty. Operand 11094 states and 28529 transitions. [2021-06-12 19:22:23,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-12 19:22:23,734 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:23,734 INFO L472 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:23,934 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable707,347 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:23,934 INFO L430 AbstractCegarLoop]: === Iteration 356 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:23,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:23,934 INFO L82 PathProgramCache]: Analyzing trace with hash -227330850, now seen corresponding path program 203 times [2021-06-12 19:22:23,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:23,934 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167320212] [2021-06-12 19:22:23,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:23,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:24,028 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 15 proven. 116 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:22:24,028 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:24,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167320212] [2021-06-12 19:22:24,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167320212] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:24,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1017631703] [2021-06-12 19:22:24,029 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 [2021-06-12 19:22:24,058 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-06-12 19:22:24,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:22:24,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 19:22:24,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:22:24,135 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 117 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:22:24,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1017631703] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:24,136 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:24,136 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-12 19:22:24,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699092358] [2021-06-12 19:22:24,136 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:22:24,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:24,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:22:24,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:22:24,136 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) [2021-06-12 19:22:25,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:25,151 INFO L93 Difference]: Finished difference Result 17716 states and 42908 transitions. [2021-06-12 19:22:25,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-12 19:22:25,152 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 [2021-06-12 19:22:25,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:25,174 INFO L225 Difference]: With dead ends: 17716 [2021-06-12 19:22:25,174 INFO L226 Difference]: Without dead ends: 17548 [2021-06-12 19:22:25,175 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 446.6ms TimeCoverageRelationStatistics Valid=273, Invalid=2079, Unknown=0, NotChecked=0, Total=2352 [2021-06-12 19:22:25,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17548 states. [2021-06-12 19:22:25,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17548 to 11789. [2021-06-12 19:22:25,336 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) [2021-06-12 19:22:25,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11789 states to 11789 states and 30351 transitions. [2021-06-12 19:22:25,352 INFO L78 Accepts]: Start accepts. Automaton has 11789 states and 30351 transitions. Word has length 53 [2021-06-12 19:22:25,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:25,353 INFO L482 AbstractCegarLoop]: Abstraction has 11789 states and 30351 transitions. [2021-06-12 19:22:25,353 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) [2021-06-12 19:22:25,353 INFO L276 IsEmpty]: Start isEmpty. Operand 11789 states and 30351 transitions. [2021-06-12 19:22:25,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-12 19:22:25,360 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:25,360 INFO L472 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:25,560 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable711,348 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:25,560 INFO L430 AbstractCegarLoop]: === Iteration 357 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:25,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:25,560 INFO L82 PathProgramCache]: Analyzing trace with hash 159271827, now seen corresponding path program 204 times [2021-06-12 19:22:25,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:25,560 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264523269] [2021-06-12 19:22:25,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:25,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:25,637 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 35 proven. 99 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:22:25,638 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:25,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264523269] [2021-06-12 19:22:25,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264523269] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:25,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407253822] [2021-06-12 19:22:25,638 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 [2021-06-12 19:22:25,667 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-06-12 19:22:25,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:22:25,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 19:22:25,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:22:25,743 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 35 proven. 99 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:22:25,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1407253822] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:25,743 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:25,743 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-06-12 19:22:25,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996591229] [2021-06-12 19:22:25,744 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:22:25,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:25,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:22:25,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:22:25,744 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) [2021-06-12 19:22:25,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:25,946 INFO L93 Difference]: Finished difference Result 13934 states and 34216 transitions. [2021-06-12 19:22:25,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:22:25,946 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 [2021-06-12 19:22:25,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:25,960 INFO L225 Difference]: With dead ends: 13934 [2021-06-12 19:22:25,960 INFO L226 Difference]: Without dead ends: 13901 [2021-06-12 19:22:25,960 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 97.7ms TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:22:25,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13901 states. [2021-06-12 19:22:26,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13901 to 11789. [2021-06-12 19:22:26,111 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) [2021-06-12 19:22:26,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11789 states to 11789 states and 30342 transitions. [2021-06-12 19:22:26,129 INFO L78 Accepts]: Start accepts. Automaton has 11789 states and 30342 transitions. Word has length 53 [2021-06-12 19:22:26,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:26,129 INFO L482 AbstractCegarLoop]: Abstraction has 11789 states and 30342 transitions. [2021-06-12 19:22:26,129 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) [2021-06-12 19:22:26,130 INFO L276 IsEmpty]: Start isEmpty. Operand 11789 states and 30342 transitions. [2021-06-12 19:22:26,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-12 19:22:26,137 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:26,137 INFO L472 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:26,338 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable712,349 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:26,338 INFO L430 AbstractCegarLoop]: === Iteration 358 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:26,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:26,338 INFO L82 PathProgramCache]: Analyzing trace with hash -287022360, now seen corresponding path program 205 times [2021-06-12 19:22:26,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:26,338 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965313543] [2021-06-12 19:22:26,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:26,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:26,436 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 15 proven. 116 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:22:26,436 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:26,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965313543] [2021-06-12 19:22:26,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965313543] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:26,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014766439] [2021-06-12 19:22:26,436 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 [2021-06-12 19:22:26,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:26,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 19:22:26,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:22:26,538 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 117 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:22:26,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2014766439] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:26,538 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:26,538 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-12 19:22:26,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935596103] [2021-06-12 19:22:26,538 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:22:26,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:26,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:22:26,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:22:26,538 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) [2021-06-12 19:22:28,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:28,045 INFO L93 Difference]: Finished difference Result 26526 states and 62830 transitions. [2021-06-12 19:22:28,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-06-12 19:22:28,046 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 [2021-06-12 19:22:28,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:28,077 INFO L225 Difference]: With dead ends: 26526 [2021-06-12 19:22:28,077 INFO L226 Difference]: Without dead ends: 26004 [2021-06-12 19:22:28,078 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2275 ImplicationChecksByTransitivity, 888.1ms TimeCoverageRelationStatistics Valid=651, Invalid=5829, Unknown=0, NotChecked=0, Total=6480 [2021-06-12 19:22:28,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26004 states. [2021-06-12 19:22:28,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26004 to 12945. [2021-06-12 19:22:28,337 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) [2021-06-12 19:22:28,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12945 states to 12945 states and 33335 transitions. [2021-06-12 19:22:28,358 INFO L78 Accepts]: Start accepts. Automaton has 12945 states and 33335 transitions. Word has length 53 [2021-06-12 19:22:28,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:28,358 INFO L482 AbstractCegarLoop]: Abstraction has 12945 states and 33335 transitions. [2021-06-12 19:22:28,358 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) [2021-06-12 19:22:28,358 INFO L276 IsEmpty]: Start isEmpty. Operand 12945 states and 33335 transitions. [2021-06-12 19:22:28,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-12 19:22:28,365 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:28,365 INFO L472 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:28,565 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable717,350 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:28,566 INFO L430 AbstractCegarLoop]: === Iteration 359 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:28,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:28,566 INFO L82 PathProgramCache]: Analyzing trace with hash 1606550509, now seen corresponding path program 206 times [2021-06-12 19:22:28,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:28,566 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036401706] [2021-06-12 19:22:28,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:28,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:28,654 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 36 proven. 98 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:22:28,654 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:28,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036401706] [2021-06-12 19:22:28,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036401706] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:28,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430781677] [2021-06-12 19:22:28,654 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 [2021-06-12 19:22:28,681 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:22:28,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:22:28,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 19:22:28,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:22:28,758 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 36 proven. 98 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:22:28,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [430781677] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:28,759 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:28,759 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-06-12 19:22:28,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012278269] [2021-06-12 19:22:28,759 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:22:28,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:28,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:22:28,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:22:28,759 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) [2021-06-12 19:22:29,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:29,016 INFO L93 Difference]: Finished difference Result 15322 states and 37639 transitions. [2021-06-12 19:22:29,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:22:29,017 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 [2021-06-12 19:22:29,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:29,032 INFO L225 Difference]: With dead ends: 15322 [2021-06-12 19:22:29,032 INFO L226 Difference]: Without dead ends: 15280 [2021-06-12 19:22:29,032 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 119.3ms TimeCoverageRelationStatistics Valid=115, Invalid=227, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:22:29,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15280 states. [2021-06-12 19:22:29,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15280 to 12945. [2021-06-12 19:22:29,192 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) [2021-06-12 19:22:29,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12945 states to 12945 states and 33326 transitions. [2021-06-12 19:22:29,212 INFO L78 Accepts]: Start accepts. Automaton has 12945 states and 33326 transitions. Word has length 53 [2021-06-12 19:22:29,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:29,212 INFO L482 AbstractCegarLoop]: Abstraction has 12945 states and 33326 transitions. [2021-06-12 19:22:29,213 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) [2021-06-12 19:22:29,213 INFO L276 IsEmpty]: Start isEmpty. Operand 12945 states and 33326 transitions. [2021-06-12 19:22:29,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-12 19:22:29,220 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:29,220 INFO L472 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:29,420 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable718,351 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:29,421 INFO L430 AbstractCegarLoop]: === Iteration 360 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:29,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:29,421 INFO L82 PathProgramCache]: Analyzing trace with hash -440336226, now seen corresponding path program 207 times [2021-06-12 19:22:29,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:29,421 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405969365] [2021-06-12 19:22:29,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:29,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:29,530 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 15 proven. 116 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:22:29,530 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:29,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405969365] [2021-06-12 19:22:29,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405969365] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:29,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115833473] [2021-06-12 19:22:29,531 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 [2021-06-12 19:22:29,562 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-06-12 19:22:29,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:22:29,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 19:22:29,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:22:29,699 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 117 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:22:29,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2115833473] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:29,700 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:29,700 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-12 19:22:29,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112349656] [2021-06-12 19:22:29,700 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:22:29,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:29,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:22:29,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:22:29,700 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) [2021-06-12 19:22:31,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:31,997 INFO L93 Difference]: Finished difference Result 33896 states and 80215 transitions. [2021-06-12 19:22:31,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2021-06-12 19:22:31,998 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 [2021-06-12 19:22:31,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:32,044 INFO L225 Difference]: With dead ends: 33896 [2021-06-12 19:22:32,044 INFO L226 Difference]: Without dead ends: 33278 [2021-06-12 19:22:32,046 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6564 ImplicationChecksByTransitivity, 1596.9ms TimeCoverageRelationStatistics Valid=1461, Invalid=15051, Unknown=0, NotChecked=0, Total=16512 [2021-06-12 19:22:32,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33278 states. [2021-06-12 19:22:32,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33278 to 13864. [2021-06-12 19:22:32,392 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) [2021-06-12 19:22:32,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13864 states to 13864 states and 35696 transitions. [2021-06-12 19:22:32,412 INFO L78 Accepts]: Start accepts. Automaton has 13864 states and 35696 transitions. Word has length 53 [2021-06-12 19:22:32,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:32,413 INFO L482 AbstractCegarLoop]: Abstraction has 13864 states and 35696 transitions. [2021-06-12 19:22:32,413 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) [2021-06-12 19:22:32,413 INFO L276 IsEmpty]: Start isEmpty. Operand 13864 states and 35696 transitions. [2021-06-12 19:22:32,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-12 19:22:32,420 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:32,420 INFO L472 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:32,620 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable724,352 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:32,620 INFO L430 AbstractCegarLoop]: === Iteration 361 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:32,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:32,621 INFO L82 PathProgramCache]: Analyzing trace with hash 309081427, now seen corresponding path program 208 times [2021-06-12 19:22:32,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:32,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819499059] [2021-06-12 19:22:32,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:32,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:32,720 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 43 proven. 91 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:22:32,720 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:32,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819499059] [2021-06-12 19:22:32,720 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819499059] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:32,720 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155111439] [2021-06-12 19:22:32,720 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 [2021-06-12 19:22:32,747 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:22:32,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:22:32,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 19:22:32,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:22:32,852 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 43 proven. 91 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:22:32,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1155111439] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:32,852 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:32,852 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-06-12 19:22:32,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290888614] [2021-06-12 19:22:32,852 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:22:32,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:32,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:22:32,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:22:32,853 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) [2021-06-12 19:22:33,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:33,117 INFO L93 Difference]: Finished difference Result 16347 states and 40212 transitions. [2021-06-12 19:22:33,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:22:33,118 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 [2021-06-12 19:22:33,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:33,134 INFO L225 Difference]: With dead ends: 16347 [2021-06-12 19:22:33,134 INFO L226 Difference]: Without dead ends: 16296 [2021-06-12 19:22:33,134 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 141.0ms TimeCoverageRelationStatistics Valid=137, Invalid=283, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:22:33,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16296 states. [2021-06-12 19:22:33,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16296 to 13554. [2021-06-12 19:22:33,302 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) [2021-06-12 19:22:33,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13554 states to 13554 states and 34836 transitions. [2021-06-12 19:22:33,324 INFO L78 Accepts]: Start accepts. Automaton has 13554 states and 34836 transitions. Word has length 53 [2021-06-12 19:22:33,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:33,324 INFO L482 AbstractCegarLoop]: Abstraction has 13554 states and 34836 transitions. [2021-06-12 19:22:33,324 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) [2021-06-12 19:22:33,324 INFO L276 IsEmpty]: Start isEmpty. Operand 13554 states and 34836 transitions. [2021-06-12 19:22:33,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-12 19:22:33,335 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:33,335 INFO L472 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:33,536 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable725,353 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:33,537 INFO L430 AbstractCegarLoop]: === Iteration 362 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:33,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:33,537 INFO L82 PathProgramCache]: Analyzing trace with hash 2031484712, now seen corresponding path program 209 times [2021-06-12 19:22:33,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:33,537 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187905790] [2021-06-12 19:22:33,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:33,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:33,658 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 119 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:22:33,658 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:33,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187905790] [2021-06-12 19:22:33,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187905790] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:33,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75897682] [2021-06-12 19:22:33,658 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-12 19:22:33,689 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-06-12 19:22:33,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:22:33,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 19:22:33,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:22:33,764 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 119 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:22:33,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [75897682] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:33,765 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:33,765 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-12 19:22:33,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205752748] [2021-06-12 19:22:33,765 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:22:33,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:33,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:22:33,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:22:33,765 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) [2021-06-12 19:22:34,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:34,530 INFO L93 Difference]: Finished difference Result 18422 states and 44497 transitions. [2021-06-12 19:22:34,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 19:22:34,530 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 [2021-06-12 19:22:34,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:34,550 INFO L225 Difference]: With dead ends: 18422 [2021-06-12 19:22:34,550 INFO L226 Difference]: Without dead ends: 17582 [2021-06-12 19:22:34,550 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 332.4ms TimeCoverageRelationStatistics Valid=175, Invalid=881, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 19:22:34,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17582 states. [2021-06-12 19:22:34,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17582 to 10239. [2021-06-12 19:22:34,702 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) [2021-06-12 19:22:34,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10239 states to 10239 states and 26120 transitions. [2021-06-12 19:22:34,719 INFO L78 Accepts]: Start accepts. Automaton has 10239 states and 26120 transitions. Word has length 53 [2021-06-12 19:22:34,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:34,719 INFO L482 AbstractCegarLoop]: Abstraction has 10239 states and 26120 transitions. [2021-06-12 19:22:34,719 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) [2021-06-12 19:22:34,719 INFO L276 IsEmpty]: Start isEmpty. Operand 10239 states and 26120 transitions. [2021-06-12 19:22:34,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-12 19:22:34,727 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:34,727 INFO L472 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:34,927 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable732,354 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:34,927 INFO L430 AbstractCegarLoop]: === Iteration 363 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:34,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:34,928 INFO L82 PathProgramCache]: Analyzing trace with hash 1793423195, now seen corresponding path program 95 times [2021-06-12 19:22:34,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:34,928 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944004410] [2021-06-12 19:22:34,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:34,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:34,989 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 100 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:22:34,989 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:34,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944004410] [2021-06-12 19:22:34,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944004410] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:34,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322668158] [2021-06-12 19:22:34,989 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 [2021-06-12 19:22:35,021 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-06-12 19:22:35,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:22:35,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 19:22:35,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:22:35,195 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 100 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:22:35,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1322668158] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:35,196 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:35,196 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15] total 18 [2021-06-12 19:22:35,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448469312] [2021-06-12 19:22:35,196 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:22:35,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:35,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:22:35,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=215, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:22:35,196 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) [2021-06-12 19:22:35,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:35,491 INFO L93 Difference]: Finished difference Result 12499 states and 30979 transitions. [2021-06-12 19:22:35,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 19:22:35,492 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 [2021-06-12 19:22:35,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:35,506 INFO L225 Difference]: With dead ends: 12499 [2021-06-12 19:22:35,506 INFO L226 Difference]: Without dead ends: 12485 [2021-06-12 19:22:35,506 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 111.1ms TimeCoverageRelationStatistics Valid=148, Invalid=272, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:22:35,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12485 states. [2021-06-12 19:22:35,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12485 to 10638. [2021-06-12 19:22:35,642 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) [2021-06-12 19:22:35,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10638 states to 10638 states and 27208 transitions. [2021-06-12 19:22:35,659 INFO L78 Accepts]: Start accepts. Automaton has 10638 states and 27208 transitions. Word has length 53 [2021-06-12 19:22:35,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:35,659 INFO L482 AbstractCegarLoop]: Abstraction has 10638 states and 27208 transitions. [2021-06-12 19:22:35,659 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) [2021-06-12 19:22:35,659 INFO L276 IsEmpty]: Start isEmpty. Operand 10638 states and 27208 transitions. [2021-06-12 19:22:35,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-12 19:22:35,667 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:35,667 INFO L472 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:35,867 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 355 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable733 [2021-06-12 19:22:35,867 INFO L430 AbstractCegarLoop]: === Iteration 364 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:35,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:35,868 INFO L82 PathProgramCache]: Analyzing trace with hash 1171542785, now seen corresponding path program 96 times [2021-06-12 19:22:35,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:35,868 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344276849] [2021-06-12 19:22:35,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:35,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:35,940 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 100 proven. 34 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:22:35,940 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:35,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344276849] [2021-06-12 19:22:35,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344276849] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:35,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932893132] [2021-06-12 19:22:35,940 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 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 [2021-06-12 19:22:35,988 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-06-12 19:22:35,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:22:35,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 19:22:35,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:22:36,070 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 101 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:22:36,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [932893132] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:36,070 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:36,070 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 11 [2021-06-12 19:22:36,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848865858] [2021-06-12 19:22:36,070 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 19:22:36,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:36,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 19:22:36,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:22:36,071 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) [2021-06-12 19:22:36,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:36,378 INFO L93 Difference]: Finished difference Result 14368 states and 35164 transitions. [2021-06-12 19:22:36,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:22:36,379 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 [2021-06-12 19:22:36,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:36,395 INFO L225 Difference]: With dead ends: 14368 [2021-06-12 19:22:36,395 INFO L226 Difference]: Without dead ends: 14368 [2021-06-12 19:22:36,396 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 112.3ms TimeCoverageRelationStatistics Valid=128, Invalid=178, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:22:36,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14368 states. [2021-06-12 19:22:36,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14368 to 10646. [2021-06-12 19:22:36,528 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) [2021-06-12 19:22:36,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10646 states to 10646 states and 27233 transitions. [2021-06-12 19:22:36,543 INFO L78 Accepts]: Start accepts. Automaton has 10646 states and 27233 transitions. Word has length 53 [2021-06-12 19:22:36,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:36,543 INFO L482 AbstractCegarLoop]: Abstraction has 10646 states and 27233 transitions. [2021-06-12 19:22:36,544 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) [2021-06-12 19:22:36,544 INFO L276 IsEmpty]: Start isEmpty. Operand 10646 states and 27233 transitions. [2021-06-12 19:22:36,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-12 19:22:36,550 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:36,550 INFO L472 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:36,750 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable735,356 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:36,751 INFO L430 AbstractCegarLoop]: === Iteration 365 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:36,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:36,751 INFO L82 PathProgramCache]: Analyzing trace with hash -466029671, now seen corresponding path program 97 times [2021-06-12 19:22:36,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:36,751 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342859270] [2021-06-12 19:22:36,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:36,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:36,823 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 100 proven. 34 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:22:36,823 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:36,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342859270] [2021-06-12 19:22:36,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342859270] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:36,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636972023] [2021-06-12 19:22:36,824 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 [2021-06-12 19:22:36,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:36,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 19:22:36,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:22:36,931 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 101 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:22:36,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [636972023] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:36,932 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:36,932 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 12 [2021-06-12 19:22:36,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124812967] [2021-06-12 19:22:36,932 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:22:36,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:36,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:22:36,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:22:36,932 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) [2021-06-12 19:22:37,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:37,326 INFO L93 Difference]: Finished difference Result 15753 states and 38328 transitions. [2021-06-12 19:22:37,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 19:22:37,326 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 [2021-06-12 19:22:37,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:37,344 INFO L225 Difference]: With dead ends: 15753 [2021-06-12 19:22:37,344 INFO L226 Difference]: Without dead ends: 15753 [2021-06-12 19:22:37,344 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 159.9ms TimeCoverageRelationStatistics Valid=216, Invalid=336, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:22:37,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15753 states. [2021-06-12 19:22:37,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15753 to 10665. [2021-06-12 19:22:37,514 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) [2021-06-12 19:22:37,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10665 states to 10665 states and 27293 transitions. [2021-06-12 19:22:37,528 INFO L78 Accepts]: Start accepts. Automaton has 10665 states and 27293 transitions. Word has length 53 [2021-06-12 19:22:37,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:37,528 INFO L482 AbstractCegarLoop]: Abstraction has 10665 states and 27293 transitions. [2021-06-12 19:22:37,528 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) [2021-06-12 19:22:37,528 INFO L276 IsEmpty]: Start isEmpty. Operand 10665 states and 27293 transitions. [2021-06-12 19:22:37,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-12 19:22:37,535 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:37,535 INFO L472 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:37,735 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 357 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable736 [2021-06-12 19:22:37,736 INFO L430 AbstractCegarLoop]: === Iteration 366 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:37,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:37,736 INFO L82 PathProgramCache]: Analyzing trace with hash 2138942461, now seen corresponding path program 98 times [2021-06-12 19:22:37,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:37,736 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769838754] [2021-06-12 19:22:37,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:37,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:37,817 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 96 proven. 38 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:22:37,817 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:37,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769838754] [2021-06-12 19:22:37,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769838754] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:37,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18870918] [2021-06-12 19:22:37,817 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 [2021-06-12 19:22:37,845 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:22:37,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:22:37,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 19:22:37,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:22:37,931 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 97 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:22:37,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [18870918] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:37,932 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:37,932 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 13 [2021-06-12 19:22:37,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690979587] [2021-06-12 19:22:37,932 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:22:37,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:37,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:22:37,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:22:37,932 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) [2021-06-12 19:22:38,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:38,334 INFO L93 Difference]: Finished difference Result 16162 states and 39295 transitions. [2021-06-12 19:22:38,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 19:22:38,334 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 [2021-06-12 19:22:38,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:38,352 INFO L225 Difference]: With dead ends: 16162 [2021-06-12 19:22:38,352 INFO L226 Difference]: Without dead ends: 16162 [2021-06-12 19:22:38,353 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 201.5ms TimeCoverageRelationStatistics Valid=289, Invalid=467, Unknown=0, NotChecked=0, Total=756 [2021-06-12 19:22:38,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16162 states. [2021-06-12 19:22:38,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16162 to 10690. [2021-06-12 19:22:38,487 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) [2021-06-12 19:22:38,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10690 states to 10690 states and 27371 transitions. [2021-06-12 19:22:38,502 INFO L78 Accepts]: Start accepts. Automaton has 10690 states and 27371 transitions. Word has length 53 [2021-06-12 19:22:38,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:38,502 INFO L482 AbstractCegarLoop]: Abstraction has 10690 states and 27371 transitions. [2021-06-12 19:22:38,502 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) [2021-06-12 19:22:38,502 INFO L276 IsEmpty]: Start isEmpty. Operand 10690 states and 27371 transitions. [2021-06-12 19:22:38,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-12 19:22:38,508 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:38,509 INFO L472 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:38,709 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable737,358 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:38,709 INFO L430 AbstractCegarLoop]: === Iteration 367 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:38,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:38,709 INFO L82 PathProgramCache]: Analyzing trace with hash 1099655449, now seen corresponding path program 99 times [2021-06-12 19:22:38,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:38,709 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852109891] [2021-06-12 19:22:38,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:38,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:38,803 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 92 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:22:38,804 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:38,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852109891] [2021-06-12 19:22:38,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852109891] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:38,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791450213] [2021-06-12 19:22:38,804 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 [2021-06-12 19:22:38,835 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-06-12 19:22:38,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:22:38,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 19:22:38,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:22:38,978 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 106 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:22:38,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [791450213] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:38,979 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:38,979 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 18 [2021-06-12 19:22:38,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386872785] [2021-06-12 19:22:38,979 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:22:38,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:38,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:22:38,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=228, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:22:38,979 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) [2021-06-12 19:22:39,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:39,388 INFO L93 Difference]: Finished difference Result 12484 states and 30934 transitions. [2021-06-12 19:22:39,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 19:22:39,388 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 [2021-06-12 19:22:39,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:39,403 INFO L225 Difference]: With dead ends: 12484 [2021-06-12 19:22:39,403 INFO L226 Difference]: Without dead ends: 12484 [2021-06-12 19:22:39,403 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 246.2ms TimeCoverageRelationStatistics Valid=296, Invalid=516, Unknown=0, NotChecked=0, Total=812 [2021-06-12 19:22:39,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12484 states. [2021-06-12 19:22:39,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12484 to 10077. [2021-06-12 19:22:39,527 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) [2021-06-12 19:22:39,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10077 states to 10077 states and 25757 transitions. [2021-06-12 19:22:39,541 INFO L78 Accepts]: Start accepts. Automaton has 10077 states and 25757 transitions. Word has length 53 [2021-06-12 19:22:39,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:39,541 INFO L482 AbstractCegarLoop]: Abstraction has 10077 states and 25757 transitions. [2021-06-12 19:22:39,541 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) [2021-06-12 19:22:39,542 INFO L276 IsEmpty]: Start isEmpty. Operand 10077 states and 25757 transitions. [2021-06-12 19:22:39,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-12 19:22:39,549 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:39,549 INFO L472 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:39,749 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 359 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable738 [2021-06-12 19:22:39,749 INFO L430 AbstractCegarLoop]: === Iteration 368 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:39,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:39,749 INFO L82 PathProgramCache]: Analyzing trace with hash 2113323565, now seen corresponding path program 210 times [2021-06-12 19:22:39,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:39,749 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813672010] [2021-06-12 19:22:39,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:39,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:39,861 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 57 proven. 78 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:22:39,861 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:39,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813672010] [2021-06-12 19:22:39,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813672010] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:39,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894852123] [2021-06-12 19:22:39,861 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 [2021-06-12 19:22:39,890 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-06-12 19:22:39,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:22:39,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 19:22:39,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:22:39,970 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 57 proven. 78 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:22:39,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [894852123] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:39,970 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:39,971 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-06-12 19:22:39,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986819883] [2021-06-12 19:22:39,971 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:22:39,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:39,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:22:39,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:22:39,971 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) [2021-06-12 19:22:40,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:40,291 INFO L93 Difference]: Finished difference Result 11675 states and 28615 transitions. [2021-06-12 19:22:40,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 19:22:40,292 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 [2021-06-12 19:22:40,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:40,303 INFO L225 Difference]: With dead ends: 11675 [2021-06-12 19:22:40,304 INFO L226 Difference]: Without dead ends: 11621 [2021-06-12 19:22:40,304 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 166.7ms TimeCoverageRelationStatistics Valid=161, Invalid=345, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:22:40,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11621 states. [2021-06-12 19:22:40,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11621 to 10086. [2021-06-12 19:22:40,419 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) [2021-06-12 19:22:40,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10086 states to 10086 states and 25766 transitions. [2021-06-12 19:22:40,434 INFO L78 Accepts]: Start accepts. Automaton has 10086 states and 25766 transitions. Word has length 53 [2021-06-12 19:22:40,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:40,434 INFO L482 AbstractCegarLoop]: Abstraction has 10086 states and 25766 transitions. [2021-06-12 19:22:40,434 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) [2021-06-12 19:22:40,434 INFO L276 IsEmpty]: Start isEmpty. Operand 10086 states and 25766 transitions. [2021-06-12 19:22:40,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-12 19:22:40,441 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:40,441 INFO L472 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:40,641 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable741,360 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:40,642 INFO L430 AbstractCegarLoop]: === Iteration 369 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:40,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:40,642 INFO L82 PathProgramCache]: Analyzing trace with hash 1980297346, now seen corresponding path program 100 times [2021-06-12 19:22:40,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:40,642 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119968324] [2021-06-12 19:22:40,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:40,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:40,762 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 7 proven. 125 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:22:40,763 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:40,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119968324] [2021-06-12 19:22:40,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119968324] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:40,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822530744] [2021-06-12 19:22:40,763 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 [2021-06-12 19:22:40,790 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:22:40,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:22:40,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 19:22:40,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:22:40,865 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 7 proven. 125 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:22:40,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [822530744] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:40,865 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:40,865 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-12 19:22:40,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906535656] [2021-06-12 19:22:40,866 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:22:40,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:40,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:22:40,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:22:40,866 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) [2021-06-12 19:22:41,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:41,475 INFO L93 Difference]: Finished difference Result 14226 states and 34514 transitions. [2021-06-12 19:22:41,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 19:22:41,475 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 [2021-06-12 19:22:41,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:41,488 INFO L225 Difference]: With dead ends: 14226 [2021-06-12 19:22:41,489 INFO L226 Difference]: Without dead ends: 13952 [2021-06-12 19:22:41,489 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 330.8ms TimeCoverageRelationStatistics Valid=175, Invalid=881, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 19:22:41,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13952 states. [2021-06-12 19:22:41,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13952 to 9958. [2021-06-12 19:22:41,602 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) [2021-06-12 19:22:41,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9958 states to 9958 states and 25415 transitions. [2021-06-12 19:22:41,615 INFO L78 Accepts]: Start accepts. Automaton has 9958 states and 25415 transitions. Word has length 53 [2021-06-12 19:22:41,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:41,615 INFO L482 AbstractCegarLoop]: Abstraction has 9958 states and 25415 transitions. [2021-06-12 19:22:41,615 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) [2021-06-12 19:22:41,616 INFO L276 IsEmpty]: Start isEmpty. Operand 9958 states and 25415 transitions. [2021-06-12 19:22:41,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-12 19:22:41,622 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:41,622 INFO L472 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:41,822 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 361 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable749 [2021-06-12 19:22:41,822 INFO L430 AbstractCegarLoop]: === Iteration 370 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:41,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:41,822 INFO L82 PathProgramCache]: Analyzing trace with hash -217067145, now seen corresponding path program 211 times [2021-06-12 19:22:41,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:41,823 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765671515] [2021-06-12 19:22:41,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:41,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:41,924 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 66 proven. 68 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:22:41,924 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:41,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765671515] [2021-06-12 19:22:41,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765671515] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:41,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158332842] [2021-06-12 19:22:41,924 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 [2021-06-12 19:22:41,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:41,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 19:22:41,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:22:42,033 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 66 proven. 68 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:22:42,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [158332842] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:42,033 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:42,033 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-06-12 19:22:42,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768871399] [2021-06-12 19:22:42,034 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:22:42,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:42,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:22:42,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:22:42,034 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) [2021-06-12 19:22:42,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:42,361 INFO L93 Difference]: Finished difference Result 12529 states and 31068 transitions. [2021-06-12 19:22:42,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:22:42,361 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 [2021-06-12 19:22:42,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:42,376 INFO L225 Difference]: With dead ends: 12529 [2021-06-12 19:22:42,376 INFO L226 Difference]: Without dead ends: 12529 [2021-06-12 19:22:42,376 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 176.7ms TimeCoverageRelationStatistics Valid=200, Invalid=352, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:22:42,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12529 states. [2021-06-12 19:22:42,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12529 to 10698. [2021-06-12 19:22:42,503 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) [2021-06-12 19:22:42,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10698 states to 10698 states and 27656 transitions. [2021-06-12 19:22:42,578 INFO L78 Accepts]: Start accepts. Automaton has 10698 states and 27656 transitions. Word has length 53 [2021-06-12 19:22:42,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:42,578 INFO L482 AbstractCegarLoop]: Abstraction has 10698 states and 27656 transitions. [2021-06-12 19:22:42,578 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) [2021-06-12 19:22:42,578 INFO L276 IsEmpty]: Start isEmpty. Operand 10698 states and 27656 transitions. [2021-06-12 19:22:42,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-12 19:22:42,584 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:42,584 INFO L472 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:42,784 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable750,362 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:42,784 INFO L430 AbstractCegarLoop]: === Iteration 371 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:42,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:42,785 INFO L82 PathProgramCache]: Analyzing trace with hash 2097202474, now seen corresponding path program 101 times [2021-06-12 19:22:42,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:42,785 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243768277] [2021-06-12 19:22:42,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:42,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:42,911 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 7 proven. 125 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:22:42,912 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:42,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243768277] [2021-06-12 19:22:42,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243768277] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:42,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812064270] [2021-06-12 19:22:42,912 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 [2021-06-12 19:22:42,959 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-06-12 19:22:42,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:22:42,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 19:22:42,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:22:43,053 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 7 proven. 125 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:22:43,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1812064270] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:43,053 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:43,053 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-12 19:22:43,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283316229] [2021-06-12 19:22:43,054 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:22:43,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:43,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:22:43,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:22:43,054 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) [2021-06-12 19:22:43,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:43,689 INFO L93 Difference]: Finished difference Result 14809 states and 36436 transitions. [2021-06-12 19:22:43,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 19:22:43,689 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 [2021-06-12 19:22:43,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:43,703 INFO L225 Difference]: With dead ends: 14809 [2021-06-12 19:22:43,704 INFO L226 Difference]: Without dead ends: 14757 [2021-06-12 19:22:43,704 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 308.0ms TimeCoverageRelationStatistics Valid=138, Invalid=732, Unknown=0, NotChecked=0, Total=870 [2021-06-12 19:22:43,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14757 states. [2021-06-12 19:22:43,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14757 to 10607. [2021-06-12 19:22:43,829 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) [2021-06-12 19:22:43,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10607 states to 10607 states and 27441 transitions. [2021-06-12 19:22:43,844 INFO L78 Accepts]: Start accepts. Automaton has 10607 states and 27441 transitions. Word has length 53 [2021-06-12 19:22:43,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:43,844 INFO L482 AbstractCegarLoop]: Abstraction has 10607 states and 27441 transitions. [2021-06-12 19:22:43,844 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) [2021-06-12 19:22:43,844 INFO L276 IsEmpty]: Start isEmpty. Operand 10607 states and 27441 transitions. [2021-06-12 19:22:43,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-12 19:22:43,851 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:43,851 INFO L472 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:44,051 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 363 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable751 [2021-06-12 19:22:44,051 INFO L430 AbstractCegarLoop]: === Iteration 372 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:44,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:44,051 INFO L82 PathProgramCache]: Analyzing trace with hash 1617639658, now seen corresponding path program 212 times [2021-06-12 19:22:44,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:44,051 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271758216] [2021-06-12 19:22:44,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:44,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:44,173 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 16 proven. 116 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:22:44,173 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:44,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271758216] [2021-06-12 19:22:44,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271758216] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:44,173 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124670025] [2021-06-12 19:22:44,173 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 [2021-06-12 19:22:44,201 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:22:44,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:22:44,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 19:22:44,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:22:44,397 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 13 proven. 119 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:22:44,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2124670025] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:44,397 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:44,397 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2021-06-12 19:22:44,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932696329] [2021-06-12 19:22:44,397 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:22:44,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:44,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:22:44,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:22:44,398 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) [2021-06-12 19:22:45,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:45,009 INFO L93 Difference]: Finished difference Result 10731 states and 27633 transitions. [2021-06-12 19:22:45,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 19:22:45,010 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 [2021-06-12 19:22:45,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:45,021 INFO L225 Difference]: With dead ends: 10731 [2021-06-12 19:22:45,021 INFO L226 Difference]: Without dead ends: 10675 [2021-06-12 19:22:45,021 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 206.1ms TimeCoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:22:45,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10675 states. [2021-06-12 19:22:45,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10675 to 10607. [2021-06-12 19:22:45,129 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) [2021-06-12 19:22:45,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10607 states to 10607 states and 27408 transitions. [2021-06-12 19:22:45,144 INFO L78 Accepts]: Start accepts. Automaton has 10607 states and 27408 transitions. Word has length 53 [2021-06-12 19:22:45,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:45,144 INFO L482 AbstractCegarLoop]: Abstraction has 10607 states and 27408 transitions. [2021-06-12 19:22:45,144 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) [2021-06-12 19:22:45,144 INFO L276 IsEmpty]: Start isEmpty. Operand 10607 states and 27408 transitions. [2021-06-12 19:22:45,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-12 19:22:45,150 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:45,150 INFO L472 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:45,350 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 364 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable752 [2021-06-12 19:22:45,351 INFO L430 AbstractCegarLoop]: === Iteration 373 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:45,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:45,351 INFO L82 PathProgramCache]: Analyzing trace with hash -290292687, now seen corresponding path program 102 times [2021-06-12 19:22:45,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:45,351 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364110886] [2021-06-12 19:22:45,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:45,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:45,451 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 42 proven. 91 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:22:45,451 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:45,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364110886] [2021-06-12 19:22:45,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364110886] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:45,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045541539] [2021-06-12 19:22:45,452 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 [2021-06-12 19:22:45,496 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-12 19:22:45,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:22:45,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 19:22:45,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:22:45,604 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 43 proven. 91 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:22:45,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2045541539] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:45,604 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:45,604 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 16 [2021-06-12 19:22:45,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262124021] [2021-06-12 19:22:45,604 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:22:45,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:45,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:22:45,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:22:45,605 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) [2021-06-12 19:22:45,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:45,938 INFO L93 Difference]: Finished difference Result 12680 states and 31642 transitions. [2021-06-12 19:22:45,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:22:45,939 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 [2021-06-12 19:22:45,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:45,950 INFO L225 Difference]: With dead ends: 12680 [2021-06-12 19:22:45,951 INFO L226 Difference]: Without dead ends: 12630 [2021-06-12 19:22:45,951 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 156.6ms TimeCoverageRelationStatistics Valid=129, Invalid=333, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:22:45,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12630 states. [2021-06-12 19:22:46,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12630 to 10144. [2021-06-12 19:22:46,072 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) [2021-06-12 19:22:46,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10144 states to 10144 states and 26207 transitions. [2021-06-12 19:22:46,087 INFO L78 Accepts]: Start accepts. Automaton has 10144 states and 26207 transitions. Word has length 53 [2021-06-12 19:22:46,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:46,088 INFO L482 AbstractCegarLoop]: Abstraction has 10144 states and 26207 transitions. [2021-06-12 19:22:46,088 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) [2021-06-12 19:22:46,088 INFO L276 IsEmpty]: Start isEmpty. Operand 10144 states and 26207 transitions. [2021-06-12 19:22:46,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-12 19:22:46,094 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:46,094 INFO L472 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:46,294 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable753,365 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:46,295 INFO L430 AbstractCegarLoop]: === Iteration 374 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:46,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:46,295 INFO L82 PathProgramCache]: Analyzing trace with hash 1595716629, now seen corresponding path program 213 times [2021-06-12 19:22:46,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:46,295 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612400196] [2021-06-12 19:22:46,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:46,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:46,385 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 64 proven. 70 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:22:46,385 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:46,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612400196] [2021-06-12 19:22:46,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612400196] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:46,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274916649] [2021-06-12 19:22:46,385 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 [2021-06-12 19:22:46,416 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-12 19:22:46,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:22:46,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 19:22:46,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:22:46,498 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 64 proven. 70 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:22:46,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274916649] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:46,499 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:46,499 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-06-12 19:22:46,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260723896] [2021-06-12 19:22:46,499 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:22:46,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:46,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:22:46,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:22:46,499 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) [2021-06-12 19:22:46,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:46,820 INFO L93 Difference]: Finished difference Result 12591 states and 31328 transitions. [2021-06-12 19:22:46,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:22:46,820 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 [2021-06-12 19:22:46,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:46,834 INFO L225 Difference]: With dead ends: 12591 [2021-06-12 19:22:46,834 INFO L226 Difference]: Without dead ends: 12591 [2021-06-12 19:22:46,834 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 142.7ms TimeCoverageRelationStatistics Valid=157, Invalid=263, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:22:46,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12591 states. [2021-06-12 19:22:46,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12591 to 10616. [2021-06-12 19:22:46,962 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) [2021-06-12 19:22:46,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10616 states to 10616 states and 27616 transitions. [2021-06-12 19:22:46,978 INFO L78 Accepts]: Start accepts. Automaton has 10616 states and 27616 transitions. Word has length 53 [2021-06-12 19:22:46,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:46,978 INFO L482 AbstractCegarLoop]: Abstraction has 10616 states and 27616 transitions. [2021-06-12 19:22:46,978 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) [2021-06-12 19:22:46,978 INFO L276 IsEmpty]: Start isEmpty. Operand 10616 states and 27616 transitions. [2021-06-12 19:22:46,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-12 19:22:46,985 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:46,985 INFO L472 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:47,185 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 366 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable759 [2021-06-12 19:22:47,186 INFO L430 AbstractCegarLoop]: === Iteration 375 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:47,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:47,186 INFO L82 PathProgramCache]: Analyzing trace with hash -2006879870, now seen corresponding path program 103 times [2021-06-12 19:22:47,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:47,186 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661929009] [2021-06-12 19:22:47,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:47,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:47,286 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 7 proven. 125 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:22:47,286 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:47,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661929009] [2021-06-12 19:22:47,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661929009] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:47,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865057428] [2021-06-12 19:22:47,286 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 [2021-06-12 19:22:47,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:47,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 19:22:47,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:22:47,391 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 7 proven. 125 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:22:47,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865057428] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:47,391 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:47,391 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-12 19:22:47,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267500388] [2021-06-12 19:22:47,391 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:22:47,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:47,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:22:47,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:22:47,392 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) [2021-06-12 19:22:47,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:47,935 INFO L93 Difference]: Finished difference Result 13894 states and 34616 transitions. [2021-06-12 19:22:47,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 19:22:47,936 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 [2021-06-12 19:22:47,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:47,949 INFO L225 Difference]: With dead ends: 13894 [2021-06-12 19:22:47,949 INFO L226 Difference]: Without dead ends: 13880 [2021-06-12 19:22:47,949 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 229.2ms TimeCoverageRelationStatistics Valid=107, Invalid=595, Unknown=0, NotChecked=0, Total=702 [2021-06-12 19:22:47,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13880 states. [2021-06-12 19:22:48,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13880 to 10564. [2021-06-12 19:22:48,124 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) [2021-06-12 19:22:48,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10564 states to 10564 states and 27526 transitions. [2021-06-12 19:22:48,140 INFO L78 Accepts]: Start accepts. Automaton has 10564 states and 27526 transitions. Word has length 53 [2021-06-12 19:22:48,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:48,140 INFO L482 AbstractCegarLoop]: Abstraction has 10564 states and 27526 transitions. [2021-06-12 19:22:48,140 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) [2021-06-12 19:22:48,140 INFO L276 IsEmpty]: Start isEmpty. Operand 10564 states and 27526 transitions. [2021-06-12 19:22:48,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-12 19:22:48,146 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:48,146 INFO L472 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:48,346 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable760,367 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:48,346 INFO L430 AbstractCegarLoop]: === Iteration 376 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:48,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:48,347 INFO L82 PathProgramCache]: Analyzing trace with hash 2126035330, now seen corresponding path program 214 times [2021-06-12 19:22:48,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:48,347 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948367971] [2021-06-12 19:22:48,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:48,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:48,460 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 16 proven. 116 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:22:48,460 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:48,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948367971] [2021-06-12 19:22:48,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948367971] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:48,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080708858] [2021-06-12 19:22:48,460 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 [2021-06-12 19:22:48,487 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:22:48,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:22:48,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 19:22:48,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:22:48,650 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 13 proven. 119 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:22:48,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1080708858] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:48,651 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:48,651 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-06-12 19:22:48,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532579360] [2021-06-12 19:22:48,651 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:22:48,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:48,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:22:48,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:22:48,651 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) [2021-06-12 19:22:49,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:49,240 INFO L93 Difference]: Finished difference Result 10719 states and 27762 transitions. [2021-06-12 19:22:49,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 19:22:49,240 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 [2021-06-12 19:22:49,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:49,250 INFO L225 Difference]: With dead ends: 10719 [2021-06-12 19:22:49,250 INFO L226 Difference]: Without dead ends: 10675 [2021-06-12 19:22:49,250 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 184.0ms TimeCoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:22:49,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10675 states. [2021-06-12 19:22:49,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10675 to 10564. [2021-06-12 19:22:49,359 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) [2021-06-12 19:22:49,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10564 states to 10564 states and 27508 transitions. [2021-06-12 19:22:49,377 INFO L78 Accepts]: Start accepts. Automaton has 10564 states and 27508 transitions. Word has length 53 [2021-06-12 19:22:49,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:49,378 INFO L482 AbstractCegarLoop]: Abstraction has 10564 states and 27508 transitions. [2021-06-12 19:22:49,378 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) [2021-06-12 19:22:49,378 INFO L276 IsEmpty]: Start isEmpty. Operand 10564 states and 27508 transitions. [2021-06-12 19:22:49,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-12 19:22:49,384 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:49,384 INFO L472 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:49,584 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 368 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable761 [2021-06-12 19:22:49,585 INFO L430 AbstractCegarLoop]: === Iteration 377 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:49,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:49,585 INFO L82 PathProgramCache]: Analyzing trace with hash 145337653, now seen corresponding path program 104 times [2021-06-12 19:22:49,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:49,585 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534768346] [2021-06-12 19:22:49,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:49,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:49,672 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 50 proven. 84 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:22:49,672 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:49,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534768346] [2021-06-12 19:22:49,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534768346] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:49,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270923095] [2021-06-12 19:22:49,673 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 [2021-06-12 19:22:49,700 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:22:49,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:22:49,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 19:22:49,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:22:49,787 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 51 proven. 84 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:22:49,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1270923095] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:49,787 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:49,787 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 14 [2021-06-12 19:22:49,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773652163] [2021-06-12 19:22:49,787 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:22:49,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:49,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:22:49,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:22:49,788 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) [2021-06-12 19:22:50,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:50,001 INFO L93 Difference]: Finished difference Result 12086 states and 30576 transitions. [2021-06-12 19:22:50,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:22:50,001 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 [2021-06-12 19:22:50,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:50,013 INFO L225 Difference]: With dead ends: 12086 [2021-06-12 19:22:50,013 INFO L226 Difference]: Without dead ends: 12002 [2021-06-12 19:22:50,013 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 117.8ms TimeCoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:22:50,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12002 states. [2021-06-12 19:22:50,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12002 to 9748. [2021-06-12 19:22:50,116 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) [2021-06-12 19:22:50,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9748 states to 9748 states and 25372 transitions. [2021-06-12 19:22:50,130 INFO L78 Accepts]: Start accepts. Automaton has 9748 states and 25372 transitions. Word has length 53 [2021-06-12 19:22:50,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:50,130 INFO L482 AbstractCegarLoop]: Abstraction has 9748 states and 25372 transitions. [2021-06-12 19:22:50,130 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) [2021-06-12 19:22:50,130 INFO L276 IsEmpty]: Start isEmpty. Operand 9748 states and 25372 transitions. [2021-06-12 19:22:50,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-12 19:22:50,136 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:50,136 INFO L472 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:50,336 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable762,369 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:50,336 INFO L430 AbstractCegarLoop]: === Iteration 378 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:50,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:50,337 INFO L82 PathProgramCache]: Analyzing trace with hash 1808139831, now seen corresponding path program 215 times [2021-06-12 19:22:50,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:50,337 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670584386] [2021-06-12 19:22:50,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:50,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:50,429 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 62 proven. 72 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:22:50,429 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:50,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670584386] [2021-06-12 19:22:50,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670584386] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:50,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567128629] [2021-06-12 19:22:50,429 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 [2021-06-12 19:22:50,459 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-06-12 19:22:50,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:22:50,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 19:22:50,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:22:50,553 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 64 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:50,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1567128629] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:50,554 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:50,554 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 14 [2021-06-12 19:22:50,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099577262] [2021-06-12 19:22:50,554 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:22:50,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:50,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:22:50,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:22:50,554 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) [2021-06-12 19:22:50,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:50,835 INFO L93 Difference]: Finished difference Result 12328 states and 30680 transitions. [2021-06-12 19:22:50,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:22:50,835 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 [2021-06-12 19:22:50,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:50,849 INFO L225 Difference]: With dead ends: 12328 [2021-06-12 19:22:50,849 INFO L226 Difference]: Without dead ends: 12328 [2021-06-12 19:22:50,849 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 126.7ms TimeCoverageRelationStatistics Valid=143, Invalid=237, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:22:50,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12328 states. [2021-06-12 19:22:50,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12328 to 10133. [2021-06-12 19:22:51,000 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) [2021-06-12 19:22:51,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10133 states to 10133 states and 26526 transitions. [2021-06-12 19:22:51,016 INFO L78 Accepts]: Start accepts. Automaton has 10133 states and 26526 transitions. Word has length 53 [2021-06-12 19:22:51,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:51,017 INFO L482 AbstractCegarLoop]: Abstraction has 10133 states and 26526 transitions. [2021-06-12 19:22:51,017 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) [2021-06-12 19:22:51,017 INFO L276 IsEmpty]: Start isEmpty. Operand 10133 states and 26526 transitions. [2021-06-12 19:22:51,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-12 19:22:51,023 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:51,023 INFO L472 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:51,223 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable768,370 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:51,224 INFO L430 AbstractCegarLoop]: === Iteration 379 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:51,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:51,224 INFO L82 PathProgramCache]: Analyzing trace with hash -933239766, now seen corresponding path program 105 times [2021-06-12 19:22:51,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:51,224 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011963963] [2021-06-12 19:22:51,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:51,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:51,317 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 7 proven. 125 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:22:51,317 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:51,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011963963] [2021-06-12 19:22:51,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011963963] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:51,317 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087251057] [2021-06-12 19:22:51,317 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 [2021-06-12 19:22:51,348 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-12 19:22:51,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:22:51,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 19:22:51,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:22:51,426 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 7 proven. 125 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:22:51,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2087251057] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:51,426 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:51,426 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-12 19:22:51,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236019120] [2021-06-12 19:22:51,426 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:22:51,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:51,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:22:51,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:22:51,426 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) [2021-06-12 19:22:51,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:51,928 INFO L93 Difference]: Finished difference Result 12314 states and 31139 transitions. [2021-06-12 19:22:51,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 19:22:51,929 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 [2021-06-12 19:22:51,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:51,941 INFO L225 Difference]: With dead ends: 12314 [2021-06-12 19:22:51,942 INFO L226 Difference]: Without dead ends: 12300 [2021-06-12 19:22:51,942 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 190.8ms TimeCoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:22:51,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12300 states. [2021-06-12 19:22:52,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12300 to 10160. [2021-06-12 19:22:52,063 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) [2021-06-12 19:22:52,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10160 states to 10160 states and 26605 transitions. [2021-06-12 19:22:52,079 INFO L78 Accepts]: Start accepts. Automaton has 10160 states and 26605 transitions. Word has length 53 [2021-06-12 19:22:52,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:52,080 INFO L482 AbstractCegarLoop]: Abstraction has 10160 states and 26605 transitions. [2021-06-12 19:22:52,080 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) [2021-06-12 19:22:52,080 INFO L276 IsEmpty]: Start isEmpty. Operand 10160 states and 26605 transitions. [2021-06-12 19:22:52,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-12 19:22:52,086 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:52,086 INFO L472 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:52,286 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 371 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable769 [2021-06-12 19:22:52,287 INFO L430 AbstractCegarLoop]: === Iteration 380 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:52,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:52,287 INFO L82 PathProgramCache]: Analyzing trace with hash -1110130710, now seen corresponding path program 216 times [2021-06-12 19:22:52,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:52,287 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783513478] [2021-06-12 19:22:52,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:52,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:52,385 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 16 proven. 116 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:22:52,385 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:52,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783513478] [2021-06-12 19:22:52,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783513478] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:52,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781745312] [2021-06-12 19:22:52,385 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-12 19:22:52,415 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-06-12 19:22:52,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:22:52,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 19:22:52,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:22:52,562 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 13 proven. 119 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:22:52,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [781745312] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:52,562 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:52,562 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-06-12 19:22:52,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009132355] [2021-06-12 19:22:52,562 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:22:52,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:52,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:22:52,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:22:52,562 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) [2021-06-12 19:22:52,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:52,933 INFO L93 Difference]: Finished difference Result 10211 states and 26683 transitions. [2021-06-12 19:22:52,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:22:52,933 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 [2021-06-12 19:22:52,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:52,944 INFO L225 Difference]: With dead ends: 10211 [2021-06-12 19:22:52,944 INFO L226 Difference]: Without dead ends: 10179 [2021-06-12 19:22:52,944 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 126.2ms TimeCoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:22:52,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10179 states. [2021-06-12 19:22:53,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10179 to 10160. [2021-06-12 19:22:53,045 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) [2021-06-12 19:22:53,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10160 states to 10160 states and 26599 transitions. [2021-06-12 19:22:53,060 INFO L78 Accepts]: Start accepts. Automaton has 10160 states and 26599 transitions. Word has length 53 [2021-06-12 19:22:53,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:53,060 INFO L482 AbstractCegarLoop]: Abstraction has 10160 states and 26599 transitions. [2021-06-12 19:22:53,060 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) [2021-06-12 19:22:53,060 INFO L276 IsEmpty]: Start isEmpty. Operand 10160 states and 26599 transitions. [2021-06-12 19:22:53,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-12 19:22:53,066 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:53,066 INFO L472 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:53,267 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable770,372 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:53,267 INFO L430 AbstractCegarLoop]: === Iteration 381 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:53,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:53,267 INFO L82 PathProgramCache]: Analyzing trace with hash -1855932587, now seen corresponding path program 217 times [2021-06-12 19:22:53,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:53,267 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780224972] [2021-06-12 19:22:53,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:53,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:53,337 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 60 proven. 74 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:22:53,337 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:53,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780224972] [2021-06-12 19:22:53,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780224972] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:53,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409031685] [2021-06-12 19:22:53,338 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 [2021-06-12 19:22:53,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:53,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 19:22:53,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:22:53,464 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 95 proven. 39 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:22:53,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1409031685] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:53,465 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:53,465 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-06-12 19:22:53,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038881785] [2021-06-12 19:22:53,465 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:22:53,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:53,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:22:53,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=109, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:22:53,465 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) [2021-06-12 19:22:53,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:53,730 INFO L93 Difference]: Finished difference Result 12704 states and 31833 transitions. [2021-06-12 19:22:53,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:22:53,731 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 [2021-06-12 19:22:53,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:53,742 INFO L225 Difference]: With dead ends: 12704 [2021-06-12 19:22:53,742 INFO L226 Difference]: Without dead ends: 12704 [2021-06-12 19:22:53,742 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 102.0ms TimeCoverageRelationStatistics Valid=113, Invalid=159, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:22:53,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12704 states. [2021-06-12 19:22:53,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12704 to 10580. [2021-06-12 19:22:53,862 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) [2021-06-12 19:22:53,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10580 states to 10580 states and 27851 transitions. [2021-06-12 19:22:53,879 INFO L78 Accepts]: Start accepts. Automaton has 10580 states and 27851 transitions. Word has length 53 [2021-06-12 19:22:53,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:53,879 INFO L482 AbstractCegarLoop]: Abstraction has 10580 states and 27851 transitions. [2021-06-12 19:22:53,879 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) [2021-06-12 19:22:53,879 INFO L276 IsEmpty]: Start isEmpty. Operand 10580 states and 27851 transitions. [2021-06-12 19:22:53,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-12 19:22:53,885 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:53,885 INFO L472 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:54,086 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 373 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable771 [2021-06-12 19:22:54,086 INFO L430 AbstractCegarLoop]: === Iteration 382 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:54,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:54,086 INFO L82 PathProgramCache]: Analyzing trace with hash 1668199042, now seen corresponding path program 106 times [2021-06-12 19:22:54,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:54,086 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016105650] [2021-06-12 19:22:54,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:54,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:54,165 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 7 proven. 125 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:22:54,165 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:54,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016105650] [2021-06-12 19:22:54,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016105650] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:54,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318938374] [2021-06-12 19:22:54,165 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 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 [2021-06-12 19:22:54,199 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:22:54,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:22:54,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-12 19:22:54,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:22:54,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:22:54,304 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 [2021-06-12 19:22:54,305 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:22:54,307 INFO L628 ElimStorePlain]: treesize reduction 20, result has 4.8 percent of original size [2021-06-12 19:22:54,307 INFO L518 ElimStorePlain]: Eliminatee B vanished before elimination [2021-06-12 19:22:54,308 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:22:54,308 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:1 [2021-06-12 19:22:54,314 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 7 proven. 125 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:22:54,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [318938374] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:54,315 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:54,315 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-06-12 19:22:54,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125263268] [2021-06-12 19:22:54,315 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:22:54,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:54,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:22:54,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:22:54,315 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) [2021-06-12 19:22:54,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:54,903 INFO L93 Difference]: Finished difference Result 13655 states and 34305 transitions. [2021-06-12 19:22:54,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 19:22:54,903 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 [2021-06-12 19:22:54,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:54,919 INFO L225 Difference]: With dead ends: 13655 [2021-06-12 19:22:54,919 INFO L226 Difference]: Without dead ends: 13599 [2021-06-12 19:22:54,919 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 174.6ms TimeCoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:22:54,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13599 states. [2021-06-12 19:22:55,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13599 to 11353. [2021-06-12 19:22:55,065 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) [2021-06-12 19:22:55,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11353 states to 11353 states and 29747 transitions. [2021-06-12 19:22:55,083 INFO L78 Accepts]: Start accepts. Automaton has 11353 states and 29747 transitions. Word has length 53 [2021-06-12 19:22:55,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:55,083 INFO L482 AbstractCegarLoop]: Abstraction has 11353 states and 29747 transitions. [2021-06-12 19:22:55,083 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) [2021-06-12 19:22:55,083 INFO L276 IsEmpty]: Start isEmpty. Operand 11353 states and 29747 transitions. [2021-06-12 19:22:55,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-12 19:22:55,090 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:55,090 INFO L472 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:55,292 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 374 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable774 [2021-06-12 19:22:55,293 INFO L430 AbstractCegarLoop]: === Iteration 383 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:55,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:55,293 INFO L82 PathProgramCache]: Analyzing trace with hash 34902658, now seen corresponding path program 218 times [2021-06-12 19:22:55,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:55,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495913821] [2021-06-12 19:22:55,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:55,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:55,376 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 16 proven. 116 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:22:55,376 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:55,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495913821] [2021-06-12 19:22:55,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495913821] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:55,376 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123798000] [2021-06-12 19:22:55,377 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-12 19:22:55,404 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:22:55,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:22:55,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 19:22:55,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:22:55,516 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 13 proven. 119 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:22:55,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2123798000] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:55,516 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:55,516 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-06-12 19:22:55,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844998020] [2021-06-12 19:22:55,517 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:22:55,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:55,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:22:55,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:22:55,517 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) [2021-06-12 19:22:55,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:55,840 INFO L93 Difference]: Finished difference Result 11423 states and 29849 transitions. [2021-06-12 19:22:55,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:22:55,841 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 [2021-06-12 19:22:55,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:55,851 INFO L225 Difference]: With dead ends: 11423 [2021-06-12 19:22:55,851 INFO L226 Difference]: Without dead ends: 11403 [2021-06-12 19:22:55,852 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 105.1ms TimeCoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:22:55,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11403 states. [2021-06-12 19:22:55,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11403 to 11353. [2021-06-12 19:22:55,969 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) [2021-06-12 19:22:55,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11353 states to 11353 states and 29744 transitions. [2021-06-12 19:22:55,987 INFO L78 Accepts]: Start accepts. Automaton has 11353 states and 29744 transitions. Word has length 53 [2021-06-12 19:22:55,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:55,987 INFO L482 AbstractCegarLoop]: Abstraction has 11353 states and 29744 transitions. [2021-06-12 19:22:55,988 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) [2021-06-12 19:22:55,988 INFO L276 IsEmpty]: Start isEmpty. Operand 11353 states and 29744 transitions. [2021-06-12 19:22:55,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-12 19:22:55,996 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:55,996 INFO L472 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:56,196 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable775,375 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:56,196 INFO L430 AbstractCegarLoop]: === Iteration 384 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:56,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:56,200 INFO L82 PathProgramCache]: Analyzing trace with hash 1588490357, now seen corresponding path program 107 times [2021-06-12 19:22:56,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:56,200 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719693845] [2021-06-12 19:22:56,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:56,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:56,338 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 58 proven. 76 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:22:56,338 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:56,338 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719693845] [2021-06-12 19:22:56,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719693845] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:56,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851496521] [2021-06-12 19:22:56,339 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 [2021-06-12 19:22:56,369 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-12 19:22:56,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:22:56,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 19:22:56,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:22:56,496 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 60 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:22:56,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [851496521] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:56,497 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:56,497 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 16] total 19 [2021-06-12 19:22:56,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122576517] [2021-06-12 19:22:56,497 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 19:22:56,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:56,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 19:22:56,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:22:56,498 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) [2021-06-12 19:22:56,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:56,839 INFO L93 Difference]: Finished difference Result 12639 states and 32192 transitions. [2021-06-12 19:22:56,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 19:22:56,840 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 [2021-06-12 19:22:56,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:56,854 INFO L225 Difference]: With dead ends: 12639 [2021-06-12 19:22:56,854 INFO L226 Difference]: Without dead ends: 12617 [2021-06-12 19:22:56,855 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 190.6ms TimeCoverageRelationStatistics Valid=127, Invalid=379, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:22:56,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12617 states. [2021-06-12 19:22:56,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12617 to 11299. [2021-06-12 19:22:56,998 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) [2021-06-12 19:22:57,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11299 states to 11299 states and 29626 transitions. [2021-06-12 19:22:57,017 INFO L78 Accepts]: Start accepts. Automaton has 11299 states and 29626 transitions. Word has length 53 [2021-06-12 19:22:57,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:57,017 INFO L482 AbstractCegarLoop]: Abstraction has 11299 states and 29626 transitions. [2021-06-12 19:22:57,017 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) [2021-06-12 19:22:57,017 INFO L276 IsEmpty]: Start isEmpty. Operand 11299 states and 29626 transitions. [2021-06-12 19:22:57,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-12 19:22:57,024 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:57,024 INFO L472 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:57,224 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 376 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable776 [2021-06-12 19:22:57,225 INFO L430 AbstractCegarLoop]: === Iteration 385 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:57,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:57,225 INFO L82 PathProgramCache]: Analyzing trace with hash 1668467447, now seen corresponding path program 219 times [2021-06-12 19:22:57,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:57,225 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312828736] [2021-06-12 19:22:57,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:57,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:57,305 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 58 proven. 76 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:22:57,305 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:57,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312828736] [2021-06-12 19:22:57,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312828736] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:57,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [881012144] [2021-06-12 19:22:57,306 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 [2021-06-12 19:22:57,339 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-12 19:22:57,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:22:57,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 19:22:57,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:22:57,425 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 58 proven. 76 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:22:57,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [881012144] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:57,425 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:57,425 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-12 19:22:57,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894539076] [2021-06-12 19:22:57,426 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:22:57,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:57,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:22:57,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:22:57,426 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) [2021-06-12 19:22:57,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:57,592 INFO L93 Difference]: Finished difference Result 14216 states and 35571 transitions. [2021-06-12 19:22:57,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:22:57,592 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 [2021-06-12 19:22:57,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:57,610 INFO L225 Difference]: With dead ends: 14216 [2021-06-12 19:22:57,610 INFO L226 Difference]: Without dead ends: 14216 [2021-06-12 19:22:57,610 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 73.4ms TimeCoverageRelationStatistics Valid=58, Invalid=74, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:22:57,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14216 states. [2021-06-12 19:22:57,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14216 to 11759. [2021-06-12 19:22:57,760 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) [2021-06-12 19:22:57,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11759 states to 11759 states and 30981 transitions. [2021-06-12 19:22:57,777 INFO L78 Accepts]: Start accepts. Automaton has 11759 states and 30981 transitions. Word has length 53 [2021-06-12 19:22:57,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:57,777 INFO L482 AbstractCegarLoop]: Abstraction has 11759 states and 30981 transitions. [2021-06-12 19:22:57,777 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) [2021-06-12 19:22:57,777 INFO L276 IsEmpty]: Start isEmpty. Operand 11759 states and 30981 transitions. [2021-06-12 19:22:57,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-12 19:22:57,784 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:57,784 INFO L472 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:57,984 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable779,377 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:57,985 INFO L430 AbstractCegarLoop]: === Iteration 386 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:57,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:57,985 INFO L82 PathProgramCache]: Analyzing trace with hash 1430405930, now seen corresponding path program 108 times [2021-06-12 19:22:57,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:57,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150070338] [2021-06-12 19:22:57,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:57,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:58,079 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 7 proven. 125 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:22:58,079 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:58,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150070338] [2021-06-12 19:22:58,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150070338] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:58,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030240312] [2021-06-12 19:22:58,080 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 [2021-06-12 19:22:58,117 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-06-12 19:22:58,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:22:58,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 19:22:58,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:22:58,195 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 7 proven. 125 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:22:58,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2030240312] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:58,195 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:58,195 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-12 19:22:58,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126678929] [2021-06-12 19:22:58,196 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:22:58,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:58,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:22:58,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:22:58,196 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) [2021-06-12 19:22:58,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:58,683 INFO L93 Difference]: Finished difference Result 12771 states and 32920 transitions. [2021-06-12 19:22:58,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:22:58,684 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 [2021-06-12 19:22:58,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:58,697 INFO L225 Difference]: With dead ends: 12771 [2021-06-12 19:22:58,697 INFO L226 Difference]: Without dead ends: 12763 [2021-06-12 19:22:58,697 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 135.4ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:22:58,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12763 states. [2021-06-12 19:22:58,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12763 to 11651. [2021-06-12 19:22:58,861 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) [2021-06-12 19:22:58,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11651 states to 11651 states and 30717 transitions. [2021-06-12 19:22:58,879 INFO L78 Accepts]: Start accepts. Automaton has 11651 states and 30717 transitions. Word has length 53 [2021-06-12 19:22:58,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:58,879 INFO L482 AbstractCegarLoop]: Abstraction has 11651 states and 30717 transitions. [2021-06-12 19:22:58,879 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) [2021-06-12 19:22:58,879 INFO L276 IsEmpty]: Start isEmpty. Operand 11651 states and 30717 transitions. [2021-06-12 19:22:58,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-12 19:22:58,886 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:58,887 INFO L472 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:59,087 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable780,378 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:59,087 INFO L430 AbstractCegarLoop]: === Iteration 387 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:59,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:59,087 INFO L82 PathProgramCache]: Analyzing trace with hash -123290927, now seen corresponding path program 220 times [2021-06-12 19:22:59,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:59,087 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582284025] [2021-06-12 19:22:59,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:59,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:59,149 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 72 proven. 62 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:22:59,149 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:59,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582284025] [2021-06-12 19:22:59,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1582284025] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:59,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982179921] [2021-06-12 19:22:59,149 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 [2021-06-12 19:22:59,176 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:22:59,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:22:59,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 19:22:59,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:22:59,256 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 72 proven. 62 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:22:59,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [982179921] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:59,256 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:22:59,256 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-12 19:22:59,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031863290] [2021-06-12 19:22:59,256 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:22:59,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:22:59,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:22:59,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:22:59,256 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) [2021-06-12 19:22:59,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:22:59,403 INFO L93 Difference]: Finished difference Result 13925 states and 34879 transitions. [2021-06-12 19:22:59,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:22:59,403 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 [2021-06-12 19:22:59,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:22:59,420 INFO L225 Difference]: With dead ends: 13925 [2021-06-12 19:22:59,420 INFO L226 Difference]: Without dead ends: 13922 [2021-06-12 19:22:59,420 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 57.1ms TimeCoverageRelationStatistics Valid=58, Invalid=74, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:22:59,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13922 states. [2021-06-12 19:22:59,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13922 to 11650. [2021-06-12 19:22:59,571 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) [2021-06-12 19:22:59,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11650 states to 11650 states and 30710 transitions. [2021-06-12 19:22:59,589 INFO L78 Accepts]: Start accepts. Automaton has 11650 states and 30710 transitions. Word has length 53 [2021-06-12 19:22:59,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:22:59,589 INFO L482 AbstractCegarLoop]: Abstraction has 11650 states and 30710 transitions. [2021-06-12 19:22:59,589 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) [2021-06-12 19:22:59,589 INFO L276 IsEmpty]: Start isEmpty. Operand 11650 states and 30710 transitions. [2021-06-12 19:22:59,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-12 19:22:59,595 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:22:59,595 INFO L472 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:22:59,796 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable781,379 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:22:59,796 INFO L430 AbstractCegarLoop]: === Iteration 388 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:22:59,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:22:59,796 INFO L82 PathProgramCache]: Analyzing trace with hash 83771639, now seen corresponding path program 221 times [2021-06-12 19:22:59,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:22:59,796 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304611337] [2021-06-12 19:22:59,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:22:59,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:22:59,861 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 65 proven. 68 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:22:59,861 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:22:59,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304611337] [2021-06-12 19:22:59,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304611337] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:22:59,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538505207] [2021-06-12 19:22:59,862 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 [2021-06-12 19:22:59,892 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-06-12 19:22:59,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:22:59,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 19:22:59,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:23:00,009 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 68 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:00,010 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [538505207] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:00,010 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:23:00,010 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 13 [2021-06-12 19:23:00,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8582791] [2021-06-12 19:23:00,010 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:23:00,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:23:00,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:23:00,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:23:00,010 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) [2021-06-12 19:23:00,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:23:00,237 INFO L93 Difference]: Finished difference Result 14037 states and 35373 transitions. [2021-06-12 19:23:00,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:23:00,237 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 [2021-06-12 19:23:00,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:23:00,254 INFO L225 Difference]: With dead ends: 14037 [2021-06-12 19:23:00,254 INFO L226 Difference]: Without dead ends: 14025 [2021-06-12 19:23:00,254 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 91.9ms TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:23:00,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14025 states. [2021-06-12 19:23:00,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14025 to 11650. [2021-06-12 19:23:00,397 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) [2021-06-12 19:23:00,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11650 states to 11650 states and 30707 transitions. [2021-06-12 19:23:00,414 INFO L78 Accepts]: Start accepts. Automaton has 11650 states and 30707 transitions. Word has length 53 [2021-06-12 19:23:00,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:23:00,414 INFO L482 AbstractCegarLoop]: Abstraction has 11650 states and 30707 transitions. [2021-06-12 19:23:00,414 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) [2021-06-12 19:23:00,414 INFO L276 IsEmpty]: Start isEmpty. Operand 11650 states and 30707 transitions. [2021-06-12 19:23:00,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-12 19:23:00,421 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:23:00,421 INFO L472 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:23:00,621 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 380 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable783 [2021-06-12 19:23:00,621 INFO L430 AbstractCegarLoop]: === Iteration 389 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:23:00,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:23:00,622 INFO L82 PathProgramCache]: Analyzing trace with hash -1364228374, now seen corresponding path program 222 times [2021-06-12 19:23:00,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:23:00,622 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439321443] [2021-06-12 19:23:00,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:23:00,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:23:00,697 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 17 proven. 115 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:23:00,697 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:23:00,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439321443] [2021-06-12 19:23:00,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439321443] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:00,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995422584] [2021-06-12 19:23:00,697 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-12 19:23:00,727 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-06-12 19:23:00,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:23:00,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 19:23:00,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:23:00,816 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 13 proven. 119 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:23:00,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1995422584] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:00,816 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:23:00,816 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-12 19:23:00,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079873304] [2021-06-12 19:23:00,816 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:23:00,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:23:00,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:23:00,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:23:00,817 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) [2021-06-12 19:23:01,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:23:01,384 INFO L93 Difference]: Finished difference Result 12517 states and 32320 transitions. [2021-06-12 19:23:01,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:23:01,384 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 [2021-06-12 19:23:01,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:23:01,394 INFO L225 Difference]: With dead ends: 12517 [2021-06-12 19:23:01,395 INFO L226 Difference]: Without dead ends: 12384 [2021-06-12 19:23:01,395 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 124.1ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:23:01,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12384 states. [2021-06-12 19:23:01,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12384 to 11825. [2021-06-12 19:23:01,532 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) [2021-06-12 19:23:01,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11825 states to 11825 states and 31060 transitions. [2021-06-12 19:23:01,551 INFO L78 Accepts]: Start accepts. Automaton has 11825 states and 31060 transitions. Word has length 53 [2021-06-12 19:23:01,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:23:01,551 INFO L482 AbstractCegarLoop]: Abstraction has 11825 states and 31060 transitions. [2021-06-12 19:23:01,551 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) [2021-06-12 19:23:01,551 INFO L276 IsEmpty]: Start isEmpty. Operand 11825 states and 31060 transitions. [2021-06-12 19:23:01,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-12 19:23:01,559 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:23:01,559 INFO L472 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:23:01,759 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 381 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable786 [2021-06-12 19:23:01,759 INFO L430 AbstractCegarLoop]: === Iteration 390 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:23:01,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:23:01,759 INFO L82 PathProgramCache]: Analyzing trace with hash -1977764554, now seen corresponding path program 223 times [2021-06-12 19:23:01,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:23:01,759 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210640043] [2021-06-12 19:23:01,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:23:01,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:23:01,842 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 15 proven. 116 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:23:01,842 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:23:01,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210640043] [2021-06-12 19:23:01,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210640043] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:01,842 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427425888] [2021-06-12 19:23:01,842 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 [2021-06-12 19:23:01,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:23:01,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 19:23:01,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:23:01,946 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 117 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:23:01,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1427425888] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:01,947 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:23:01,947 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-06-12 19:23:01,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056644341] [2021-06-12 19:23:01,947 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:23:01,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:23:01,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:23:01,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:23:01,947 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) [2021-06-12 19:23:02,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:23:02,349 INFO L93 Difference]: Finished difference Result 12581 states and 32513 transitions. [2021-06-12 19:23:02,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:23:02,349 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 [2021-06-12 19:23:02,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:23:02,361 INFO L225 Difference]: With dead ends: 12581 [2021-06-12 19:23:02,361 INFO L226 Difference]: Without dead ends: 12569 [2021-06-12 19:23:02,361 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 125.6ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:23:02,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12569 states. [2021-06-12 19:23:02,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12569 to 11827. [2021-06-12 19:23:02,493 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) [2021-06-12 19:23:02,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11827 states to 11827 states and 31064 transitions. [2021-06-12 19:23:02,512 INFO L78 Accepts]: Start accepts. Automaton has 11827 states and 31064 transitions. Word has length 53 [2021-06-12 19:23:02,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:23:02,512 INFO L482 AbstractCegarLoop]: Abstraction has 11827 states and 31064 transitions. [2021-06-12 19:23:02,512 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) [2021-06-12 19:23:02,512 INFO L276 IsEmpty]: Start isEmpty. Operand 11827 states and 31064 transitions. [2021-06-12 19:23:02,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-12 19:23:02,520 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:23:02,520 INFO L472 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:23:02,720 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable787,382 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:23:02,720 INFO L430 AbstractCegarLoop]: === Iteration 391 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:23:02,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:23:02,720 INFO L82 PathProgramCache]: Analyzing trace with hash 164152780, now seen corresponding path program 224 times [2021-06-12 19:23:02,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:23:02,720 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830479025] [2021-06-12 19:23:02,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:23:02,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:23:02,801 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 15 proven. 117 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:23:02,801 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:23:02,801 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830479025] [2021-06-12 19:23:02,801 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830479025] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:02,802 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343779862] [2021-06-12 19:23:02,802 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-12 19:23:02,833 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:23:02,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:23:02,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 19:23:02,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:23:02,909 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 118 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:23:02,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1343779862] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:02,910 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:23:02,910 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-12 19:23:02,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716265646] [2021-06-12 19:23:02,910 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 19:23:02,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:23:02,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 19:23:02,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:23:02,910 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) [2021-06-12 19:23:03,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:23:03,555 INFO L93 Difference]: Finished difference Result 13836 states and 35142 transitions. [2021-06-12 19:23:03,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-12 19:23:03,555 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 [2021-06-12 19:23:03,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:23:03,571 INFO L225 Difference]: With dead ends: 13836 [2021-06-12 19:23:03,571 INFO L226 Difference]: Without dead ends: 13782 [2021-06-12 19:23:03,571 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 244.4ms TimeCoverageRelationStatistics Valid=123, Invalid=807, Unknown=0, NotChecked=0, Total=930 [2021-06-12 19:23:03,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13782 states. [2021-06-12 19:23:03,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13782 to 11958. [2021-06-12 19:23:03,746 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) [2021-06-12 19:23:03,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11958 states to 11958 states and 31404 transitions. [2021-06-12 19:23:03,764 INFO L78 Accepts]: Start accepts. Automaton has 11958 states and 31404 transitions. Word has length 53 [2021-06-12 19:23:03,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:23:03,764 INFO L482 AbstractCegarLoop]: Abstraction has 11958 states and 31404 transitions. [2021-06-12 19:23:03,764 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) [2021-06-12 19:23:03,764 INFO L276 IsEmpty]: Start isEmpty. Operand 11958 states and 31404 transitions. [2021-06-12 19:23:03,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-12 19:23:03,771 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:23:03,771 INFO L472 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:23:03,971 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 383 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable788 [2021-06-12 19:23:03,972 INFO L430 AbstractCegarLoop]: === Iteration 392 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:23:03,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:23:03,972 INFO L82 PathProgramCache]: Analyzing trace with hash 1696711889, now seen corresponding path program 225 times [2021-06-12 19:23:03,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:23:03,972 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415746355] [2021-06-12 19:23:03,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:23:03,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:23:04,046 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 51 proven. 84 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:23:04,046 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:23:04,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415746355] [2021-06-12 19:23:04,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415746355] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:04,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131201934] [2021-06-12 19:23:04,046 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 [2021-06-12 19:23:04,083 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-12 19:23:04,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:23:04,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 19:23:04,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:23:04,160 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 51 proven. 84 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:23:04,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [131201934] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:04,160 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:23:04,161 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-12 19:23:04,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866750601] [2021-06-12 19:23:04,161 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 19:23:04,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:23:04,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 19:23:04,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:23:04,161 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) [2021-06-12 19:23:04,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:23:04,332 INFO L93 Difference]: Finished difference Result 14190 states and 35732 transitions. [2021-06-12 19:23:04,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:23:04,332 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 [2021-06-12 19:23:04,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:23:04,347 INFO L225 Difference]: With dead ends: 14190 [2021-06-12 19:23:04,348 INFO L226 Difference]: Without dead ends: 14172 [2021-06-12 19:23:04,348 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 77.4ms TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:23:04,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14172 states. [2021-06-12 19:23:04,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14172 to 12156. [2021-06-12 19:23:04,482 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) [2021-06-12 19:23:04,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12156 states to 12156 states and 32015 transitions. [2021-06-12 19:23:04,500 INFO L78 Accepts]: Start accepts. Automaton has 12156 states and 32015 transitions. Word has length 53 [2021-06-12 19:23:04,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:23:04,500 INFO L482 AbstractCegarLoop]: Abstraction has 12156 states and 32015 transitions. [2021-06-12 19:23:04,500 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) [2021-06-12 19:23:04,500 INFO L276 IsEmpty]: Start isEmpty. Operand 12156 states and 32015 transitions. [2021-06-12 19:23:04,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-12 19:23:04,507 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:23:04,507 INFO L472 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:23:04,707 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 384 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable789 [2021-06-12 19:23:04,707 INFO L430 AbstractCegarLoop]: === Iteration 393 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:23:04,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:23:04,708 INFO L82 PathProgramCache]: Analyzing trace with hash 318989314, now seen corresponding path program 226 times [2021-06-12 19:23:04,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:23:04,708 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57877230] [2021-06-12 19:23:04,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:23:04,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:23:04,798 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 15 proven. 117 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:23:04,798 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:23:04,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57877230] [2021-06-12 19:23:04,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57877230] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:04,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978140150] [2021-06-12 19:23:04,798 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 [2021-06-12 19:23:04,826 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:23:04,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:23:04,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-12 19:23:04,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:23:04,934 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:23:04,935 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 [2021-06-12 19:23:04,936 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:23:04,937 INFO L628 ElimStorePlain]: treesize reduction 20, result has 4.8 percent of original size [2021-06-12 19:23:04,937 INFO L518 ElimStorePlain]: Eliminatee B vanished before elimination [2021-06-12 19:23:04,938 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:23:04,938 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:1 [2021-06-12 19:23:04,945 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 18 proven. 114 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:23:04,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [978140150] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:04,945 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:23:04,945 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 15 [2021-06-12 19:23:04,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438470637] [2021-06-12 19:23:04,945 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:23:04,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:23:04,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:23:04,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:23:04,945 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) [2021-06-12 19:23:06,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:23:06,050 INFO L93 Difference]: Finished difference Result 16988 states and 42019 transitions. [2021-06-12 19:23:06,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-12 19:23:06,050 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 [2021-06-12 19:23:06,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:23:06,067 INFO L225 Difference]: With dead ends: 16988 [2021-06-12 19:23:06,067 INFO L226 Difference]: Without dead ends: 16820 [2021-06-12 19:23:06,067 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 898 ImplicationChecksByTransitivity, 513.7ms TimeCoverageRelationStatistics Valid=321, Invalid=2649, Unknown=0, NotChecked=0, Total=2970 [2021-06-12 19:23:06,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16820 states. [2021-06-12 19:23:06,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16820 to 12541. [2021-06-12 19:23:06,287 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) [2021-06-12 19:23:06,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12541 states to 12541 states and 32944 transitions. [2021-06-12 19:23:06,308 INFO L78 Accepts]: Start accepts. Automaton has 12541 states and 32944 transitions. Word has length 53 [2021-06-12 19:23:06,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:23:06,308 INFO L482 AbstractCegarLoop]: Abstraction has 12541 states and 32944 transitions. [2021-06-12 19:23:06,309 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) [2021-06-12 19:23:06,309 INFO L276 IsEmpty]: Start isEmpty. Operand 12541 states and 32944 transitions. [2021-06-12 19:23:06,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-12 19:23:06,315 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:23:06,315 INFO L472 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:23:06,516 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable793,385 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:23:06,516 INFO L430 AbstractCegarLoop]: === Iteration 394 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:23:06,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:23:06,516 INFO L82 PathProgramCache]: Analyzing trace with hash 705591991, now seen corresponding path program 227 times [2021-06-12 19:23:06,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:23:06,516 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035584711] [2021-06-12 19:23:06,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:23:06,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:23:06,601 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 43 proven. 92 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:23:06,601 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:23:06,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035584711] [2021-06-12 19:23:06,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035584711] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:06,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155481743] [2021-06-12 19:23:06,601 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 [2021-06-12 19:23:06,630 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-06-12 19:23:06,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:23:06,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 19:23:06,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:23:06,731 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 44 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:06,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1155481743] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:06,732 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:23:06,732 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 15 [2021-06-12 19:23:06,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682119043] [2021-06-12 19:23:06,732 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:23:06,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:23:06,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:23:06,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:23:06,732 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) [2021-06-12 19:23:06,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:23:06,970 INFO L93 Difference]: Finished difference Result 14864 states and 37234 transitions. [2021-06-12 19:23:06,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:23:06,970 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 [2021-06-12 19:23:06,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:23:06,986 INFO L225 Difference]: With dead ends: 14864 [2021-06-12 19:23:06,986 INFO L226 Difference]: Without dead ends: 14837 [2021-06-12 19:23:06,986 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 121.1ms TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:23:06,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14837 states. [2021-06-12 19:23:07,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14837 to 12541. [2021-06-12 19:23:07,156 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) [2021-06-12 19:23:07,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12541 states to 12541 states and 32941 transitions. [2021-06-12 19:23:07,177 INFO L78 Accepts]: Start accepts. Automaton has 12541 states and 32941 transitions. Word has length 53 [2021-06-12 19:23:07,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:23:07,177 INFO L482 AbstractCegarLoop]: Abstraction has 12541 states and 32941 transitions. [2021-06-12 19:23:07,177 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) [2021-06-12 19:23:07,177 INFO L276 IsEmpty]: Start isEmpty. Operand 12541 states and 32941 transitions. [2021-06-12 19:23:07,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-12 19:23:07,184 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:23:07,184 INFO L472 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:23:07,385 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 386 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable794 [2021-06-12 19:23:07,385 INFO L430 AbstractCegarLoop]: === Iteration 395 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:23:07,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:23:07,385 INFO L82 PathProgramCache]: Analyzing trace with hash 259297804, now seen corresponding path program 228 times [2021-06-12 19:23:07,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:23:07,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600580948] [2021-06-12 19:23:07,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:23:07,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:23:07,485 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 15 proven. 117 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:23:07,485 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:23:07,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600580948] [2021-06-12 19:23:07,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600580948] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:07,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938216940] [2021-06-12 19:23:07,486 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 [2021-06-12 19:23:07,515 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-06-12 19:23:07,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:23:07,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 19:23:07,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:23:07,594 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 118 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:23:07,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [938216940] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:07,594 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:23:07,594 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-12 19:23:07,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017078491] [2021-06-12 19:23:07,594 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:23:07,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:23:07,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:23:07,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:23:07,595 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) [2021-06-12 19:23:09,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:23:09,319 INFO L93 Difference]: Finished difference Result 23524 states and 56000 transitions. [2021-06-12 19:23:09,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2021-06-12 19:23:09,320 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 [2021-06-12 19:23:09,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:23:09,342 INFO L225 Difference]: With dead ends: 23524 [2021-06-12 19:23:09,342 INFO L226 Difference]: Without dead ends: 23068 [2021-06-12 19:23:09,343 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3318 ImplicationChecksByTransitivity, 1041.5ms TimeCoverageRelationStatistics Valid=807, Invalid=8123, Unknown=0, NotChecked=0, Total=8930 [2021-06-12 19:23:09,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23068 states. [2021-06-12 19:23:09,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23068 to 13305. [2021-06-12 19:23:09,545 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) [2021-06-12 19:23:09,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13305 states to 13305 states and 34759 transitions. [2021-06-12 19:23:09,566 INFO L78 Accepts]: Start accepts. Automaton has 13305 states and 34759 transitions. Word has length 53 [2021-06-12 19:23:09,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:23:09,566 INFO L482 AbstractCegarLoop]: Abstraction has 13305 states and 34759 transitions. [2021-06-12 19:23:09,566 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) [2021-06-12 19:23:09,566 INFO L276 IsEmpty]: Start isEmpty. Operand 13305 states and 34759 transitions. [2021-06-12 19:23:09,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-12 19:23:09,574 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:23:09,574 INFO L472 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:23:09,774 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable799,387 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:23:09,774 INFO L430 AbstractCegarLoop]: === Iteration 396 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:23:09,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:23:09,775 INFO L82 PathProgramCache]: Analyzing trace with hash -2142096623, now seen corresponding path program 229 times [2021-06-12 19:23:09,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:23:09,775 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432435208] [2021-06-12 19:23:09,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:23:09,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:23:09,871 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 41 proven. 94 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:23:09,871 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:23:09,871 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432435208] [2021-06-12 19:23:09,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432435208] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:09,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570430483] [2021-06-12 19:23:09,872 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 [2021-06-12 19:23:09,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:23:09,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 19:23:09,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:23:09,975 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 41 proven. 94 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:23:09,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1570430483] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:09,975 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:23:09,975 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-06-12 19:23:09,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730375769] [2021-06-12 19:23:09,976 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:23:09,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:23:09,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:23:09,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:23:09,976 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) [2021-06-12 19:23:10,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:23:10,194 INFO L93 Difference]: Finished difference Result 15631 states and 39032 transitions. [2021-06-12 19:23:10,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:23:10,194 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 [2021-06-12 19:23:10,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:23:10,213 INFO L225 Difference]: With dead ends: 15631 [2021-06-12 19:23:10,213 INFO L226 Difference]: Without dead ends: 15595 [2021-06-12 19:23:10,213 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 116.9ms TimeCoverageRelationStatistics Valid=102, Invalid=204, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:23:10,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15595 states. [2021-06-12 19:23:10,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15595 to 13305. [2021-06-12 19:23:10,389 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) [2021-06-12 19:23:10,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13305 states to 13305 states and 34756 transitions. [2021-06-12 19:23:10,409 INFO L78 Accepts]: Start accepts. Automaton has 13305 states and 34756 transitions. Word has length 53 [2021-06-12 19:23:10,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:23:10,409 INFO L482 AbstractCegarLoop]: Abstraction has 13305 states and 34756 transitions. [2021-06-12 19:23:10,409 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) [2021-06-12 19:23:10,409 INFO L276 IsEmpty]: Start isEmpty. Operand 13305 states and 34756 transitions. [2021-06-12 19:23:10,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-12 19:23:10,416 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:23:10,416 INFO L472 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:23:10,617 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 388 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable800 [2021-06-12 19:23:10,617 INFO L430 AbstractCegarLoop]: === Iteration 397 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:23:10,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:23:10,617 INFO L82 PathProgramCache]: Analyzing trace with hash 105983938, now seen corresponding path program 230 times [2021-06-12 19:23:10,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:23:10,617 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206985145] [2021-06-12 19:23:10,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:23:10,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:23:10,726 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 15 proven. 117 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:23:10,726 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:23:10,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206985145] [2021-06-12 19:23:10,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206985145] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:10,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256707532] [2021-06-12 19:23:10,726 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 [2021-06-12 19:23:10,754 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:23:10,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:23:10,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 19:23:10,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:23:10,829 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 118 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:23:10,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1256707532] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:10,829 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:23:10,829 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-12 19:23:10,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744131771] [2021-06-12 19:23:10,829 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:23:10,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:23:10,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:23:10,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:23:10,830 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) [2021-06-12 19:23:13,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:23:13,727 INFO L93 Difference]: Finished difference Result 39717 states and 90677 transitions. [2021-06-12 19:23:13,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 159 states. [2021-06-12 19:23:13,728 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 [2021-06-12 19:23:13,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:23:13,772 INFO L225 Difference]: With dead ends: 39717 [2021-06-12 19:23:13,772 INFO L226 Difference]: Without dead ends: 38331 [2021-06-12 19:23:13,774 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10453 ImplicationChecksByTransitivity, 2121.9ms TimeCoverageRelationStatistics Valid=1941, Invalid=23181, Unknown=0, NotChecked=0, Total=25122 [2021-06-12 19:23:13,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38331 states. [2021-06-12 19:23:14,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38331 to 14578. [2021-06-12 19:23:14,093 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) [2021-06-12 19:23:14,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14578 states to 14578 states and 37789 transitions. [2021-06-12 19:23:14,117 INFO L78 Accepts]: Start accepts. Automaton has 14578 states and 37789 transitions. Word has length 53 [2021-06-12 19:23:14,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:23:14,117 INFO L482 AbstractCegarLoop]: Abstraction has 14578 states and 37789 transitions. [2021-06-12 19:23:14,117 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) [2021-06-12 19:23:14,117 INFO L276 IsEmpty]: Start isEmpty. Operand 14578 states and 37789 transitions. [2021-06-12 19:23:14,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-12 19:23:14,125 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:23:14,125 INFO L472 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:23:14,326 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable806,389 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:23:14,326 INFO L430 AbstractCegarLoop]: === Iteration 398 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:23:14,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:23:14,326 INFO L82 PathProgramCache]: Analyzing trace with hash 855401591, now seen corresponding path program 231 times [2021-06-12 19:23:14,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:23:14,326 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565838148] [2021-06-12 19:23:14,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:23:14,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:23:14,509 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 45 proven. 90 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:23:14,510 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:23:14,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565838148] [2021-06-12 19:23:14,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565838148] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:14,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676610646] [2021-06-12 19:23:14,510 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 [2021-06-12 19:23:14,540 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-12 19:23:14,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:23:14,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 19:23:14,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:23:14,624 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 45 proven. 90 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:23:14,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1676610646] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:14,624 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:23:14,624 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-06-12 19:23:14,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818282684] [2021-06-12 19:23:14,624 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:23:14,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:23:14,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:23:14,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:23:14,625 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) [2021-06-12 19:23:14,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:23:14,852 INFO L93 Difference]: Finished difference Result 17260 states and 42750 transitions. [2021-06-12 19:23:14,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:23:14,853 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 [2021-06-12 19:23:14,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:23:14,873 INFO L225 Difference]: With dead ends: 17260 [2021-06-12 19:23:14,873 INFO L226 Difference]: Without dead ends: 17215 [2021-06-12 19:23:14,873 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 150.5ms TimeCoverageRelationStatistics Valid=123, Invalid=257, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:23:14,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17215 states. [2021-06-12 19:23:15,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17215 to 14578. [2021-06-12 19:23:15,065 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) [2021-06-12 19:23:15,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14578 states to 14578 states and 37786 transitions. [2021-06-12 19:23:15,086 INFO L78 Accepts]: Start accepts. Automaton has 14578 states and 37786 transitions. Word has length 53 [2021-06-12 19:23:15,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:23:15,087 INFO L482 AbstractCegarLoop]: Abstraction has 14578 states and 37786 transitions. [2021-06-12 19:23:15,087 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) [2021-06-12 19:23:15,087 INFO L276 IsEmpty]: Start isEmpty. Operand 14578 states and 37786 transitions. [2021-06-12 19:23:15,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-12 19:23:15,094 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:23:15,095 INFO L472 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:23:15,295 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 390 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable807 [2021-06-12 19:23:15,295 INFO L430 AbstractCegarLoop]: === Iteration 399 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:23:15,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:23:15,295 INFO L82 PathProgramCache]: Analyzing trace with hash -1717162420, now seen corresponding path program 232 times [2021-06-12 19:23:15,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:23:15,295 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924330628] [2021-06-12 19:23:15,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:23:15,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:23:15,419 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 15 proven. 117 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:23:15,420 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:23:15,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924330628] [2021-06-12 19:23:15,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924330628] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:15,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543111236] [2021-06-12 19:23:15,420 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 [2021-06-12 19:23:15,447 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:23:15,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:23:15,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-12 19:23:15,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:23:15,618 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:23:15,618 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 [2021-06-12 19:23:15,619 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:23:15,621 INFO L628 ElimStorePlain]: treesize reduction 20, result has 4.8 percent of original size [2021-06-12 19:23:15,621 INFO L518 ElimStorePlain]: Eliminatee B vanished before elimination [2021-06-12 19:23:15,621 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:23:15,622 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:1 [2021-06-12 19:23:15,628 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 18 proven. 114 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:23:15,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [543111236] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:15,629 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:23:15,629 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 21 [2021-06-12 19:23:15,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195506732] [2021-06-12 19:23:15,629 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 19:23:15,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:23:15,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 19:23:15,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:23:15,629 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) [2021-06-12 19:23:20,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:23:20,756 INFO L93 Difference]: Finished difference Result 44078 states and 101715 transitions. [2021-06-12 19:23:20,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 255 states. [2021-06-12 19:23:20,756 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 [2021-06-12 19:23:20,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:23:20,798 INFO L225 Difference]: With dead ends: 44078 [2021-06-12 19:23:20,799 INFO L226 Difference]: Without dead ends: 42758 [2021-06-12 19:23:20,801 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 253 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28740 ImplicationChecksByTransitivity, 4132.4ms TimeCoverageRelationStatistics Valid=4371, Invalid=60399, Unknown=0, NotChecked=0, Total=64770 [2021-06-12 19:23:20,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42758 states. [2021-06-12 19:23:21,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42758 to 16260. [2021-06-12 19:23:21,111 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) [2021-06-12 19:23:21,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16260 states to 16260 states and 41923 transitions. [2021-06-12 19:23:21,138 INFO L78 Accepts]: Start accepts. Automaton has 16260 states and 41923 transitions. Word has length 53 [2021-06-12 19:23:21,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:23:21,138 INFO L482 AbstractCegarLoop]: Abstraction has 16260 states and 41923 transitions. [2021-06-12 19:23:21,139 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) [2021-06-12 19:23:21,139 INFO L276 IsEmpty]: Start isEmpty. Operand 16260 states and 41923 transitions. [2021-06-12 19:23:21,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-12 19:23:21,147 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:23:21,147 INFO L472 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:23:21,347 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable814,391 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:23:21,348 INFO L430 AbstractCegarLoop]: === Iteration 400 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:23:21,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:23:21,348 INFO L82 PathProgramCache]: Analyzing trace with hash -1635323567, now seen corresponding path program 233 times [2021-06-12 19:23:21,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:23:21,348 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874477843] [2021-06-12 19:23:21,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:23:21,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:23:21,461 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 55 proven. 80 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:23:21,462 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:23:21,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874477843] [2021-06-12 19:23:21,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874477843] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:21,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689834915] [2021-06-12 19:23:21,462 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 [2021-06-12 19:23:21,491 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-12 19:23:21,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:23:21,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 19:23:21,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:23:21,603 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 55 proven. 80 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:23:21,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1689834915] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:21,604 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:23:21,604 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 18 [2021-06-12 19:23:21,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822519422] [2021-06-12 19:23:21,604 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:23:21,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:23:21,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:23:21,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:23:21,605 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) [2021-06-12 19:23:22,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:23:22,037 INFO L93 Difference]: Finished difference Result 19781 states and 48513 transitions. [2021-06-12 19:23:22,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 19:23:22,037 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 [2021-06-12 19:23:22,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:23:22,058 INFO L225 Difference]: With dead ends: 19781 [2021-06-12 19:23:22,059 INFO L226 Difference]: Without dead ends: 19727 [2021-06-12 19:23:22,059 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 202.9ms TimeCoverageRelationStatistics Valid=167, Invalid=433, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:23:22,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19727 states. [2021-06-12 19:23:22,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19727 to 16260. [2021-06-12 19:23:22,257 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) [2021-06-12 19:23:22,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16260 states to 16260 states and 41920 transitions. [2021-06-12 19:23:22,283 INFO L78 Accepts]: Start accepts. Automaton has 16260 states and 41920 transitions. Word has length 53 [2021-06-12 19:23:22,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:23:22,283 INFO L482 AbstractCegarLoop]: Abstraction has 16260 states and 41920 transitions. [2021-06-12 19:23:22,283 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) [2021-06-12 19:23:22,283 INFO L276 IsEmpty]: Start isEmpty. Operand 16260 states and 41920 transitions. [2021-06-12 19:23:22,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-12 19:23:22,292 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:23:22,292 INFO L472 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:23:22,492 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 392 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable815 [2021-06-12 19:23:22,492 INFO L430 AbstractCegarLoop]: === Iteration 401 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:23:22,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:23:22,493 INFO L82 PathProgramCache]: Analyzing trace with hash -913888382, now seen corresponding path program 234 times [2021-06-12 19:23:22,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:23:22,493 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160365472] [2021-06-12 19:23:22,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:23:22,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:23:22,706 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:22,706 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:23:22,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160365472] [2021-06-12 19:23:22,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160365472] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:22,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092752900] [2021-06-12 19:23:22,706 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 [2021-06-12 19:23:22,736 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-06-12 19:23:22,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:23:22,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-12 19:23:22,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:23:22,813 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:22,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1092752900] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:22,813 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:23:22,813 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-06-12 19:23:22,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448998614] [2021-06-12 19:23:22,813 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:23:22,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:23:22,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:23:22,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:23:22,813 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) [2021-06-12 19:23:23,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:23:23,523 INFO L93 Difference]: Finished difference Result 21764 states and 52143 transitions. [2021-06-12 19:23:23,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 19:23:23,523 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 [2021-06-12 19:23:23,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:23:23,546 INFO L225 Difference]: With dead ends: 21764 [2021-06-12 19:23:23,546 INFO L226 Difference]: Without dead ends: 19982 [2021-06-12 19:23:23,546 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 398.6ms TimeCoverageRelationStatistics Valid=218, Invalid=1042, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 19:23:23,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19982 states. [2021-06-12 19:23:23,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19982 to 11673. [2021-06-12 19:23:23,722 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) [2021-06-12 19:23:23,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11673 states to 11673 states and 30858 transitions. [2021-06-12 19:23:23,743 INFO L78 Accepts]: Start accepts. Automaton has 11673 states and 30858 transitions. Word has length 53 [2021-06-12 19:23:23,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:23:23,743 INFO L482 AbstractCegarLoop]: Abstraction has 11673 states and 30858 transitions. [2021-06-12 19:23:23,743 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) [2021-06-12 19:23:23,743 INFO L276 IsEmpty]: Start isEmpty. Operand 11673 states and 30858 transitions. [2021-06-12 19:23:23,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-12 19:23:23,750 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:23:23,751 INFO L472 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:23:23,951 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable823,393 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:23:23,951 INFO L430 AbstractCegarLoop]: === Iteration 402 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:23:23,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:23:23,951 INFO L82 PathProgramCache]: Analyzing trace with hash -1151949899, now seen corresponding path program 109 times [2021-06-12 19:23:23,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:23:23,951 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605865626] [2021-06-12 19:23:23,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:23:23,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:23:24,023 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 89 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:24,023 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:23:24,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605865626] [2021-06-12 19:23:24,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605865626] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:24,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564664811] [2021-06-12 19:23:24,023 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 [2021-06-12 19:23:24,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:23:24,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 19:23:24,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:23:24,139 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 90 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:24,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [564664811] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:24,139 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:23:24,139 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 12 [2021-06-12 19:23:24,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027621772] [2021-06-12 19:23:24,140 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:23:24,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:23:24,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:23:24,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:23:24,140 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) [2021-06-12 19:23:24,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:23:24,352 INFO L93 Difference]: Finished difference Result 13241 states and 34204 transitions. [2021-06-12 19:23:24,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:23:24,352 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 [2021-06-12 19:23:24,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:23:24,368 INFO L225 Difference]: With dead ends: 13241 [2021-06-12 19:23:24,369 INFO L226 Difference]: Without dead ends: 13227 [2021-06-12 19:23:24,369 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 93.2ms TimeCoverageRelationStatistics Valid=77, Invalid=133, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:23:24,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13227 states. [2021-06-12 19:23:24,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13227 to 12216. [2021-06-12 19:23:24,506 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) [2021-06-12 19:23:24,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12216 states to 12216 states and 32304 transitions. [2021-06-12 19:23:24,524 INFO L78 Accepts]: Start accepts. Automaton has 12216 states and 32304 transitions. Word has length 53 [2021-06-12 19:23:24,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:23:24,524 INFO L482 AbstractCegarLoop]: Abstraction has 12216 states and 32304 transitions. [2021-06-12 19:23:24,524 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) [2021-06-12 19:23:24,524 INFO L276 IsEmpty]: Start isEmpty. Operand 12216 states and 32304 transitions. [2021-06-12 19:23:24,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-12 19:23:24,531 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:23:24,531 INFO L472 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:23:24,731 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable824,394 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:23:24,731 INFO L430 AbstractCegarLoop]: === Iteration 403 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:23:24,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:23:24,731 INFO L82 PathProgramCache]: Analyzing trace with hash -1773830309, now seen corresponding path program 110 times [2021-06-12 19:23:24,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:23:24,732 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739030867] [2021-06-12 19:23:24,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:23:24,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:23:24,800 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 89 proven. 46 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:23:24,800 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:23:24,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739030867] [2021-06-12 19:23:24,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739030867] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:24,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800387292] [2021-06-12 19:23:24,800 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 [2021-06-12 19:23:24,827 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:23:24,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:23:24,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 19:23:24,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:23:24,910 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 89 proven. 46 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:23:24,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [800387292] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:24,910 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:23:24,910 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 11 [2021-06-12 19:23:24,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424489341] [2021-06-12 19:23:24,910 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 19:23:24,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:23:24,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 19:23:24,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:23:24,911 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) [2021-06-12 19:23:25,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:23:25,188 INFO L93 Difference]: Finished difference Result 14309 states and 36490 transitions. [2021-06-12 19:23:25,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 19:23:25,188 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 [2021-06-12 19:23:25,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:23:25,206 INFO L225 Difference]: With dead ends: 14309 [2021-06-12 19:23:25,206 INFO L226 Difference]: Without dead ends: 14309 [2021-06-12 19:23:25,206 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 118.8ms TimeCoverageRelationStatistics Valid=141, Invalid=201, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:23:25,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14309 states. [2021-06-12 19:23:25,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14309 to 12222. [2021-06-12 19:23:25,369 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) [2021-06-12 19:23:25,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12222 states to 12222 states and 32323 transitions. [2021-06-12 19:23:25,389 INFO L78 Accepts]: Start accepts. Automaton has 12222 states and 32323 transitions. Word has length 53 [2021-06-12 19:23:25,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:23:25,390 INFO L482 AbstractCegarLoop]: Abstraction has 12222 states and 32323 transitions. [2021-06-12 19:23:25,390 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) [2021-06-12 19:23:25,390 INFO L276 IsEmpty]: Start isEmpty. Operand 12222 states and 32323 transitions. [2021-06-12 19:23:25,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-12 19:23:25,397 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:23:25,397 INFO L472 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:23:25,597 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable827,395 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:23:25,597 INFO L430 AbstractCegarLoop]: === Iteration 404 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:23:25,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:23:25,598 INFO L82 PathProgramCache]: Analyzing trace with hash 883564531, now seen corresponding path program 111 times [2021-06-12 19:23:25,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:23:25,598 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058619569] [2021-06-12 19:23:25,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:23:25,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:23:25,674 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 90 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:23:25,675 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:23:25,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058619569] [2021-06-12 19:23:25,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058619569] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:25,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232195276] [2021-06-12 19:23:25,675 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 [2021-06-12 19:23:25,705 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-12 19:23:25,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:23:25,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 19:23:25,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:23:25,808 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 91 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:23:25,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1232195276] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:25,808 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:23:25,808 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 14 [2021-06-12 19:23:25,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13639057] [2021-06-12 19:23:25,809 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:23:25,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:23:25,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:23:25,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:23:25,809 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) [2021-06-12 19:23:26,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:23:26,288 INFO L93 Difference]: Finished difference Result 13621 states and 34955 transitions. [2021-06-12 19:23:26,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 19:23:26,288 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 [2021-06-12 19:23:26,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:23:26,303 INFO L225 Difference]: With dead ends: 13621 [2021-06-12 19:23:26,303 INFO L226 Difference]: Without dead ends: 13621 [2021-06-12 19:23:26,304 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 254.7ms TimeCoverageRelationStatistics Valid=324, Invalid=546, Unknown=0, NotChecked=0, Total=870 [2021-06-12 19:23:26,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13621 states. [2021-06-12 19:23:26,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13621 to 12015. [2021-06-12 19:23:26,449 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) [2021-06-12 19:23:26,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12015 states to 12015 states and 31806 transitions. [2021-06-12 19:23:26,469 INFO L78 Accepts]: Start accepts. Automaton has 12015 states and 31806 transitions. Word has length 53 [2021-06-12 19:23:26,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:23:26,470 INFO L482 AbstractCegarLoop]: Abstraction has 12015 states and 31806 transitions. [2021-06-12 19:23:26,470 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) [2021-06-12 19:23:26,470 INFO L276 IsEmpty]: Start isEmpty. Operand 12015 states and 31806 transitions. [2021-06-12 19:23:26,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-06-12 19:23:26,476 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:23:26,476 INFO L472 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:23:26,677 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable828,396 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:23:26,677 INFO L430 AbstractCegarLoop]: === Iteration 405 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:23:26,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:23:26,677 INFO L82 PathProgramCache]: Analyzing trace with hash 1321467447, now seen corresponding path program 235 times [2021-06-12 19:23:26,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:23:26,677 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750208116] [2021-06-12 19:23:26,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:23:26,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:23:26,807 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 72 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:26,807 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:23:26,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750208116] [2021-06-12 19:23:26,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750208116] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:26,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501104015] [2021-06-12 19:23:26,807 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 [2021-06-12 19:23:26,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:23:26,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-12 19:23:26,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:23:26,915 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 72 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:26,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [501104015] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:26,915 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:23:26,915 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2021-06-12 19:23:26,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142756580] [2021-06-12 19:23:26,915 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:23:26,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:23:26,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:23:26,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:23:26,916 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) [2021-06-12 19:23:27,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:23:27,211 INFO L93 Difference]: Finished difference Result 13804 states and 35062 transitions. [2021-06-12 19:23:27,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 19:23:27,211 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 [2021-06-12 19:23:27,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:23:27,227 INFO L225 Difference]: With dead ends: 13804 [2021-06-12 19:23:27,227 INFO L226 Difference]: Without dead ends: 13739 [2021-06-12 19:23:27,227 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 183.9ms TimeCoverageRelationStatistics Valid=171, Invalid=381, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:23:27,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13739 states. [2021-06-12 19:23:27,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13739 to 12024. [2021-06-12 19:23:27,405 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) [2021-06-12 19:23:27,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12024 states to 12024 states and 31820 transitions. [2021-06-12 19:23:27,424 INFO L78 Accepts]: Start accepts. Automaton has 12024 states and 31820 transitions. Word has length 53 [2021-06-12 19:23:27,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:23:27,424 INFO L482 AbstractCegarLoop]: Abstraction has 12024 states and 31820 transitions. [2021-06-12 19:23:27,424 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) [2021-06-12 19:23:27,424 INFO L276 IsEmpty]: Start isEmpty. Operand 12024 states and 31820 transitions. [2021-06-12 19:23:27,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-12 19:23:27,431 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:23:27,431 INFO L472 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:23:27,632 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 397 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable831 [2021-06-12 19:23:27,632 INFO L430 AbstractCegarLoop]: === Iteration 406 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:23:27,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:23:27,632 INFO L82 PathProgramCache]: Analyzing trace with hash -278189192, now seen corresponding path program 236 times [2021-06-12 19:23:27,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:23:27,632 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443965904] [2021-06-12 19:23:27,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:23:27,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:23:27,700 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:23:27,700 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:23:27,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443965904] [2021-06-12 19:23:27,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443965904] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:27,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519981451] [2021-06-12 19:23:27,700 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 [2021-06-12 19:23:27,728 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:23:27,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:23:27,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 19:23:27,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:23:28,059 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 70 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:28,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1519981451] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:28,060 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:23:28,060 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 17] total 25 [2021-06-12 19:23:28,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944260276] [2021-06-12 19:23:28,060 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 19:23:28,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:23:28,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 19:23:28,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2021-06-12 19:23:28,060 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) [2021-06-12 19:23:29,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:23:29,529 INFO L93 Difference]: Finished difference Result 15072 states and 37802 transitions. [2021-06-12 19:23:29,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-12 19:23:29,529 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 [2021-06-12 19:23:29,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:23:29,547 INFO L225 Difference]: With dead ends: 15072 [2021-06-12 19:23:29,547 INFO L226 Difference]: Without dead ends: 15028 [2021-06-12 19:23:29,547 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 923 ImplicationChecksByTransitivity, 844.2ms TimeCoverageRelationStatistics Valid=786, Invalid=3246, Unknown=0, NotChecked=0, Total=4032 [2021-06-12 19:23:29,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15028 states. [2021-06-12 19:23:29,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15028 to 12811. [2021-06-12 19:23:29,724 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) [2021-06-12 19:23:29,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12811 states to 12811 states and 33434 transitions. [2021-06-12 19:23:29,745 INFO L78 Accepts]: Start accepts. Automaton has 12811 states and 33434 transitions. Word has length 56 [2021-06-12 19:23:29,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:23:29,746 INFO L482 AbstractCegarLoop]: Abstraction has 12811 states and 33434 transitions. [2021-06-12 19:23:29,746 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) [2021-06-12 19:23:29,746 INFO L276 IsEmpty]: Start isEmpty. Operand 12811 states and 33434 transitions. [2021-06-12 19:23:29,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-12 19:23:29,754 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:23:29,754 INFO L472 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:23:29,954 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 398 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable840 [2021-06-12 19:23:29,954 INFO L430 AbstractCegarLoop]: === Iteration 407 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:23:29,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:23:29,955 INFO L82 PathProgramCache]: Analyzing trace with hash -1678028872, now seen corresponding path program 237 times [2021-06-12 19:23:29,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:23:29,955 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809428533] [2021-06-12 19:23:29,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:23:29,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:23:30,021 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 148 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-12 19:23:30,022 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:23:30,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809428533] [2021-06-12 19:23:30,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809428533] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:30,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406057453] [2021-06-12 19:23:30,022 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 [2021-06-12 19:23:30,053 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-06-12 19:23:30,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:23:30,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 19:23:30,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:23:30,244 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 62 proven. 91 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:23:30,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1406057453] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:30,245 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:23:30,245 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2021-06-12 19:23:30,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110388890] [2021-06-12 19:23:30,245 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:23:30,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:23:30,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:23:30,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:23:30,245 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) [2021-06-12 19:23:31,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:23:31,256 INFO L93 Difference]: Finished difference Result 16926 states and 41264 transitions. [2021-06-12 19:23:31,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-12 19:23:31,256 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 [2021-06-12 19:23:31,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:23:31,273 INFO L225 Difference]: With dead ends: 16926 [2021-06-12 19:23:31,273 INFO L226 Difference]: Without dead ends: 16834 [2021-06-12 19:23:31,274 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 449.8ms TimeCoverageRelationStatistics Valid=323, Invalid=1483, Unknown=0, NotChecked=0, Total=1806 [2021-06-12 19:23:31,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16834 states. [2021-06-12 19:23:31,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16834 to 12990. [2021-06-12 19:23:31,435 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) [2021-06-12 19:23:31,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12990 states to 12990 states and 33892 transitions. [2021-06-12 19:23:31,456 INFO L78 Accepts]: Start accepts. Automaton has 12990 states and 33892 transitions. Word has length 56 [2021-06-12 19:23:31,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:23:31,456 INFO L482 AbstractCegarLoop]: Abstraction has 12990 states and 33892 transitions. [2021-06-12 19:23:31,456 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) [2021-06-12 19:23:31,456 INFO L276 IsEmpty]: Start isEmpty. Operand 12990 states and 33892 transitions. [2021-06-12 19:23:31,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-12 19:23:31,465 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:23:31,465 INFO L472 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:23:31,665 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 399 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable841 [2021-06-12 19:23:31,665 INFO L430 AbstractCegarLoop]: === Iteration 408 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:23:31,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:23:31,665 INFO L82 PathProgramCache]: Analyzing trace with hash 173585170, now seen corresponding path program 238 times [2021-06-12 19:23:31,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:23:31,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285410566] [2021-06-12 19:23:31,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:23:31,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:23:31,730 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 148 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-12 19:23:31,730 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:23:31,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285410566] [2021-06-12 19:23:31,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285410566] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:31,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612604193] [2021-06-12 19:23:31,730 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 [2021-06-12 19:23:31,758 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:23:31,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:23:31,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 19:23:31,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:23:31,829 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 148 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-12 19:23:31,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1612604193] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:31,829 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:23:31,829 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-12 19:23:31,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934769942] [2021-06-12 19:23:31,830 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 19:23:31,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:23:31,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 19:23:31,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:23:31,830 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) [2021-06-12 19:23:32,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:23:32,161 INFO L93 Difference]: Finished difference Result 14078 states and 35927 transitions. [2021-06-12 19:23:32,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:23:32,161 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 [2021-06-12 19:23:32,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:23:32,177 INFO L225 Difference]: With dead ends: 14078 [2021-06-12 19:23:32,178 INFO L226 Difference]: Without dead ends: 14012 [2021-06-12 19:23:32,178 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 61 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 53.3ms TimeCoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:23:32,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14012 states. [2021-06-12 19:23:32,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14012 to 13057. [2021-06-12 19:23:32,338 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) [2021-06-12 19:23:32,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13057 states to 13057 states and 34005 transitions. [2021-06-12 19:23:32,359 INFO L78 Accepts]: Start accepts. Automaton has 13057 states and 34005 transitions. Word has length 56 [2021-06-12 19:23:32,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:23:32,360 INFO L482 AbstractCegarLoop]: Abstraction has 13057 states and 34005 transitions. [2021-06-12 19:23:32,360 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) [2021-06-12 19:23:32,360 INFO L276 IsEmpty]: Start isEmpty. Operand 13057 states and 34005 transitions. [2021-06-12 19:23:32,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-12 19:23:32,368 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:23:32,368 INFO L472 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:23:32,568 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 400 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable842 [2021-06-12 19:23:32,568 INFO L430 AbstractCegarLoop]: === Iteration 409 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:23:32,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:23:32,568 INFO L82 PathProgramCache]: Analyzing trace with hash 1342527864, now seen corresponding path program 239 times [2021-06-12 19:23:32,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:23:32,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739546223] [2021-06-12 19:23:32,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:23:32,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:23:32,648 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 148 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-12 19:23:32,648 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:23:32,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739546223] [2021-06-12 19:23:32,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739546223] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:32,648 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123220618] [2021-06-12 19:23:32,648 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 [2021-06-12 19:23:32,690 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-06-12 19:23:32,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:23:32,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 19:23:32,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:23:32,777 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 148 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-12 19:23:32,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2123220618] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:32,777 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:23:32,777 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-12 19:23:32,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090422838] [2021-06-12 19:23:32,777 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 19:23:32,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:23:32,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 19:23:32,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:23:32,778 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) [2021-06-12 19:23:33,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:23:33,177 INFO L93 Difference]: Finished difference Result 14112 states and 36011 transitions. [2021-06-12 19:23:33,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:23:33,177 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 [2021-06-12 19:23:33,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:23:33,191 INFO L225 Difference]: With dead ends: 14112 [2021-06-12 19:23:33,192 INFO L226 Difference]: Without dead ends: 14074 [2021-06-12 19:23:33,192 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 61 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 64.6ms TimeCoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:23:33,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14074 states. [2021-06-12 19:23:33,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14074 to 13111. [2021-06-12 19:23:33,348 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) [2021-06-12 19:23:33,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13111 states to 13111 states and 34101 transitions. [2021-06-12 19:23:33,370 INFO L78 Accepts]: Start accepts. Automaton has 13111 states and 34101 transitions. Word has length 56 [2021-06-12 19:23:33,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:23:33,370 INFO L482 AbstractCegarLoop]: Abstraction has 13111 states and 34101 transitions. [2021-06-12 19:23:33,370 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) [2021-06-12 19:23:33,370 INFO L276 IsEmpty]: Start isEmpty. Operand 13111 states and 34101 transitions. [2021-06-12 19:23:33,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-12 19:23:33,379 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:23:33,379 INFO L472 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:23:33,579 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable843,401 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:23:33,579 INFO L430 AbstractCegarLoop]: === Iteration 410 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:23:33,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:23:33,579 INFO L82 PathProgramCache]: Analyzing trace with hash 1719488850, now seen corresponding path program 240 times [2021-06-12 19:23:33,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:23:33,579 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876936404] [2021-06-12 19:23:33,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:23:33,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:23:33,644 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 148 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-12 19:23:33,645 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:23:33,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876936404] [2021-06-12 19:23:33,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876936404] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:33,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047836511] [2021-06-12 19:23:33,645 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 [2021-06-12 19:23:33,677 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-06-12 19:23:33,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:23:33,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 19:23:33,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:23:33,862 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 32 proven. 121 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:23:33,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1047836511] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:33,863 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:23:33,863 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2021-06-12 19:23:33,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675024779] [2021-06-12 19:23:33,863 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:23:33,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:23:33,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:23:33,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:23:33,863 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) [2021-06-12 19:23:34,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:23:34,879 INFO L93 Difference]: Finished difference Result 18611 states and 44534 transitions. [2021-06-12 19:23:34,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-12 19:23:34,880 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 [2021-06-12 19:23:34,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:23:34,900 INFO L225 Difference]: With dead ends: 18611 [2021-06-12 19:23:34,900 INFO L226 Difference]: Without dead ends: 18544 [2021-06-12 19:23:34,900 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 426.9ms TimeCoverageRelationStatistics Valid=323, Invalid=1483, Unknown=0, NotChecked=0, Total=1806 [2021-06-12 19:23:34,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18544 states. [2021-06-12 19:23:35,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18544 to 13170. [2021-06-12 19:23:35,063 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) [2021-06-12 19:23:35,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13170 states to 13170 states and 34227 transitions. [2021-06-12 19:23:35,083 INFO L78 Accepts]: Start accepts. Automaton has 13170 states and 34227 transitions. Word has length 56 [2021-06-12 19:23:35,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:23:35,083 INFO L482 AbstractCegarLoop]: Abstraction has 13170 states and 34227 transitions. [2021-06-12 19:23:35,083 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) [2021-06-12 19:23:35,083 INFO L276 IsEmpty]: Start isEmpty. Operand 13170 states and 34227 transitions. [2021-06-12 19:23:35,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-12 19:23:35,091 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:23:35,091 INFO L472 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:23:35,292 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 402 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable844 [2021-06-12 19:23:35,292 INFO L430 AbstractCegarLoop]: === Iteration 411 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:23:35,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:23:35,292 INFO L82 PathProgramCache]: Analyzing trace with hash 1774337938, now seen corresponding path program 241 times [2021-06-12 19:23:35,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:23:35,292 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67671991] [2021-06-12 19:23:35,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:23:35,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:23:35,358 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 148 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-12 19:23:35,358 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:23:35,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67671991] [2021-06-12 19:23:35,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67671991] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:35,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363211317] [2021-06-12 19:23:35,358 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 [2021-06-12 19:23:35,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:23:35,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-12 19:23:35,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:23:35,459 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 148 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-12 19:23:35,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1363211317] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:35,459 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:23:35,459 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-12 19:23:35,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156437408] [2021-06-12 19:23:35,459 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-12 19:23:35,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:23:35,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-12 19:23:35,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:23:35,460 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) [2021-06-12 19:23:35,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:23:35,828 INFO L93 Difference]: Finished difference Result 14386 states and 36601 transitions. [2021-06-12 19:23:35,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-12 19:23:35,829 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 [2021-06-12 19:23:35,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:23:35,845 INFO L225 Difference]: With dead ends: 14386 [2021-06-12 19:23:35,846 INFO L226 Difference]: Without dead ends: 14350 [2021-06-12 19:23:35,846 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 61 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 54.3ms TimeCoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-06-12 19:23:35,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14350 states. [2021-06-12 19:23:35,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14350 to 13369. [2021-06-12 19:23:36,006 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) [2021-06-12 19:23:36,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13369 states to 13369 states and 34624 transitions. [2021-06-12 19:23:36,028 INFO L78 Accepts]: Start accepts. Automaton has 13369 states and 34624 transitions. Word has length 56 [2021-06-12 19:23:36,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:23:36,028 INFO L482 AbstractCegarLoop]: Abstraction has 13369 states and 34624 transitions. [2021-06-12 19:23:36,028 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) [2021-06-12 19:23:36,028 INFO L276 IsEmpty]: Start isEmpty. Operand 13369 states and 34624 transitions. [2021-06-12 19:23:36,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-06-12 19:23:36,036 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:23:36,036 INFO L472 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:23:36,237 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable845,403 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:23:36,237 INFO L430 AbstractCegarLoop]: === Iteration 412 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:23:36,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:23:36,237 INFO L82 PathProgramCache]: Analyzing trace with hash -1948615432, now seen corresponding path program 242 times [2021-06-12 19:23:36,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:23:36,237 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025941374] [2021-06-12 19:23:36,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:23:36,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:23:36,303 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 150 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-12 19:23:36,304 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:23:36,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025941374] [2021-06-12 19:23:36,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025941374] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:36,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303679619] [2021-06-12 19:23:36,304 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 [2021-06-12 19:23:36,332 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:23:36,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:23:36,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-12 19:23:36,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:23:36,529 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 57 proven. 97 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:23:36,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [303679619] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:36,529 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:23:36,529 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2021-06-12 19:23:36,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85802627] [2021-06-12 19:23:36,529 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:23:36,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:23:36,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:23:36,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:23:36,530 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) [2021-06-12 19:23:37,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:23:37,602 INFO L93 Difference]: Finished difference Result 18830 states and 45148 transitions. [2021-06-12 19:23:37,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-12 19:23:37,602 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 [2021-06-12 19:23:37,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:23:37,625 INFO L225 Difference]: With dead ends: 18830 [2021-06-12 19:23:37,625 INFO L226 Difference]: Without dead ends: 18792 [2021-06-12 19:23:37,625 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 458.0ms TimeCoverageRelationStatistics Valid=323, Invalid=1483, Unknown=0, NotChecked=0, Total=1806 [2021-06-12 19:23:37,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18792 states. [2021-06-12 19:23:37,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18792 to 14037. [2021-06-12 19:23:37,814 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) [2021-06-12 19:23:37,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14037 states to 14037 states and 36344 transitions. [2021-06-12 19:23:37,836 INFO L78 Accepts]: Start accepts. Automaton has 14037 states and 36344 transitions. Word has length 56 [2021-06-12 19:23:37,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:23:37,836 INFO L482 AbstractCegarLoop]: Abstraction has 14037 states and 36344 transitions. [2021-06-12 19:23:37,836 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) [2021-06-12 19:23:37,836 INFO L276 IsEmpty]: Start isEmpty. Operand 14037 states and 36344 transitions. [2021-06-12 19:23:37,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-12 19:23:37,846 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:23:37,846 INFO L472 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:23:38,046 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable846,404 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:23:38,046 INFO L430 AbstractCegarLoop]: === Iteration 413 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:23:38,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:23:38,046 INFO L82 PathProgramCache]: Analyzing trace with hash -848422539, now seen corresponding path program 112 times [2021-06-12 19:23:38,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:23:38,046 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291282886] [2021-06-12 19:23:38,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:23:38,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:23:38,213 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 8 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:38,213 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:23:38,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291282886] [2021-06-12 19:23:38,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291282886] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:38,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127457886] [2021-06-12 19:23:38,213 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 [2021-06-12 19:23:38,241 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:23:38,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:23:38,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 19:23:38,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:23:38,392 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 8 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:38,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [127457886] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:38,392 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:23:38,392 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 18 [2021-06-12 19:23:38,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525394668] [2021-06-12 19:23:38,392 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:23:38,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:23:38,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:23:38,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=305, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:23:38,393 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) [2021-06-12 19:23:39,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:23:39,447 INFO L93 Difference]: Finished difference Result 17404 states and 43003 transitions. [2021-06-12 19:23:39,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 19:23:39,448 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 [2021-06-12 19:23:39,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:23:39,467 INFO L225 Difference]: With dead ends: 17404 [2021-06-12 19:23:39,467 INFO L226 Difference]: Without dead ends: 17123 [2021-06-12 19:23:39,468 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 57 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 574.4ms TimeCoverageRelationStatistics Valid=273, Invalid=1367, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 19:23:39,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17123 states. [2021-06-12 19:23:39,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17123 to 13513. [2021-06-12 19:23:39,641 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) [2021-06-12 19:23:39,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13513 states to 13513 states and 35029 transitions. [2021-06-12 19:23:39,662 INFO L78 Accepts]: Start accepts. Automaton has 13513 states and 35029 transitions. Word has length 59 [2021-06-12 19:23:39,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:23:39,662 INFO L482 AbstractCegarLoop]: Abstraction has 13513 states and 35029 transitions. [2021-06-12 19:23:39,662 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) [2021-06-12 19:23:39,662 INFO L276 IsEmpty]: Start isEmpty. Operand 13513 states and 35029 transitions. [2021-06-12 19:23:39,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-12 19:23:39,670 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:23:39,670 INFO L472 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:23:39,870 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 405 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable847 [2021-06-12 19:23:39,871 INFO L430 AbstractCegarLoop]: === Iteration 414 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:23:39,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:23:39,871 INFO L82 PathProgramCache]: Analyzing trace with hash 917417269, now seen corresponding path program 243 times [2021-06-12 19:23:39,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:23:39,871 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996529812] [2021-06-12 19:23:39,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:23:39,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:23:40,050 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:40,051 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:23:40,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996529812] [2021-06-12 19:23:40,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996529812] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:40,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629068757] [2021-06-12 19:23:40,051 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 [2021-06-12 19:23:40,084 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-12 19:23:40,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:23:40,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 19:23:40,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:23:40,407 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 15 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:40,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [629068757] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:40,407 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:23:40,407 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 25 [2021-06-12 19:23:40,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164471932] [2021-06-12 19:23:40,407 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 19:23:40,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:23:40,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 19:23:40,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=585, Unknown=0, NotChecked=0, Total=650 [2021-06-12 19:23:40,408 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) [2021-06-12 19:23:41,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:23:41,537 INFO L93 Difference]: Finished difference Result 13861 states and 35583 transitions. [2021-06-12 19:23:41,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 19:23:41,538 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 [2021-06-12 19:23:41,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:23:41,552 INFO L225 Difference]: With dead ends: 13861 [2021-06-12 19:23:41,553 INFO L226 Difference]: Without dead ends: 13757 [2021-06-12 19:23:41,553 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 347.0ms TimeCoverageRelationStatistics Valid=65, Invalid=585, Unknown=0, NotChecked=0, Total=650 [2021-06-12 19:23:41,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13757 states. [2021-06-12 19:23:41,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13757 to 13513. [2021-06-12 19:23:41,723 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) [2021-06-12 19:23:41,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13513 states to 13513 states and 34979 transitions. [2021-06-12 19:23:41,744 INFO L78 Accepts]: Start accepts. Automaton has 13513 states and 34979 transitions. Word has length 59 [2021-06-12 19:23:41,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:23:41,744 INFO L482 AbstractCegarLoop]: Abstraction has 13513 states and 34979 transitions. [2021-06-12 19:23:41,744 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) [2021-06-12 19:23:41,744 INFO L276 IsEmpty]: Start isEmpty. Operand 13513 states and 34979 transitions. [2021-06-12 19:23:41,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-12 19:23:41,752 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:23:41,752 INFO L472 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:23:41,952 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable848,406 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:23:41,953 INFO L430 AbstractCegarLoop]: === Iteration 415 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:23:41,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:23:41,953 INFO L82 PathProgramCache]: Analyzing trace with hash -1852033535, now seen corresponding path program 244 times [2021-06-12 19:23:41,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:23:41,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735429315] [2021-06-12 19:23:41,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:23:41,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:23:42,045 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 160 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:23:42,045 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:23:42,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735429315] [2021-06-12 19:23:42,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [735429315] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:42,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235855718] [2021-06-12 19:23:42,046 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 [2021-06-12 19:23:42,074 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:23:42,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:23:42,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 19:23:42,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:23:42,160 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 160 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:23:42,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1235855718] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:42,160 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:23:42,161 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-12 19:23:42,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396623720] [2021-06-12 19:23:42,161 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 19:23:42,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:23:42,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 19:23:42,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:23:42,161 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) [2021-06-12 19:23:42,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:23:42,618 INFO L93 Difference]: Finished difference Result 14176 states and 36253 transitions. [2021-06-12 19:23:42,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 19:23:42,618 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 [2021-06-12 19:23:42,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:23:42,635 INFO L225 Difference]: With dead ends: 14176 [2021-06-12 19:23:42,636 INFO L226 Difference]: Without dead ends: 14176 [2021-06-12 19:23:42,636 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 147.1ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:23:42,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14176 states. [2021-06-12 19:23:42,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14176 to 13534. [2021-06-12 19:23:42,801 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) [2021-06-12 19:23:42,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13534 states to 13534 states and 35043 transitions. [2021-06-12 19:23:42,824 INFO L78 Accepts]: Start accepts. Automaton has 13534 states and 35043 transitions. Word has length 59 [2021-06-12 19:23:42,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:23:42,824 INFO L482 AbstractCegarLoop]: Abstraction has 13534 states and 35043 transitions. [2021-06-12 19:23:42,824 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) [2021-06-12 19:23:42,824 INFO L276 IsEmpty]: Start isEmpty. Operand 13534 states and 35043 transitions. [2021-06-12 19:23:42,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-12 19:23:42,833 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:23:42,833 INFO L472 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:23:43,034 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable849,407 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:23:43,034 INFO L430 AbstractCegarLoop]: === Iteration 416 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:23:43,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:23:43,034 INFO L82 PathProgramCache]: Analyzing trace with hash -267823288, now seen corresponding path program 113 times [2021-06-12 19:23:43,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:23:43,034 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514096287] [2021-06-12 19:23:43,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:23:43,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:23:43,109 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 102 proven. 76 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:23:43,109 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:23:43,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514096287] [2021-06-12 19:23:43,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514096287] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:43,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409329536] [2021-06-12 19:23:43,109 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 [2021-06-12 19:23:43,143 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-06-12 19:23:43,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:23:43,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 19:23:43,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:23:43,251 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 103 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:43,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1409329536] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:43,252 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:23:43,252 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 14 [2021-06-12 19:23:43,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247136679] [2021-06-12 19:23:43,252 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:23:43,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:23:43,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:23:43,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:23:43,252 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) [2021-06-12 19:23:43,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:23:43,496 INFO L93 Difference]: Finished difference Result 19967 states and 49349 transitions. [2021-06-12 19:23:43,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:23:43,497 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 [2021-06-12 19:23:43,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:23:43,520 INFO L225 Difference]: With dead ends: 19967 [2021-06-12 19:23:43,521 INFO L226 Difference]: Without dead ends: 19967 [2021-06-12 19:23:43,521 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 95.5ms TimeCoverageRelationStatistics Valid=90, Invalid=150, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:23:43,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19967 states. [2021-06-12 19:23:43,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19967 to 14829. [2021-06-12 19:23:43,792 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) [2021-06-12 19:23:43,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14829 states to 14829 states and 38932 transitions. [2021-06-12 19:23:43,814 INFO L78 Accepts]: Start accepts. Automaton has 14829 states and 38932 transitions. Word has length 59 [2021-06-12 19:23:43,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:23:43,814 INFO L482 AbstractCegarLoop]: Abstraction has 14829 states and 38932 transitions. [2021-06-12 19:23:43,814 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) [2021-06-12 19:23:43,814 INFO L276 IsEmpty]: Start isEmpty. Operand 14829 states and 38932 transitions. [2021-06-12 19:23:43,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-12 19:23:43,823 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:23:43,823 INFO L472 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:23:44,023 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable850,408 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:23:44,023 INFO L430 AbstractCegarLoop]: === Iteration 417 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:23:44,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:23:44,023 INFO L82 PathProgramCache]: Analyzing trace with hash -801688664, now seen corresponding path program 245 times [2021-06-12 19:23:44,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:23:44,024 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89741218] [2021-06-12 19:23:44,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:23:44,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:23:44,113 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 87 proven. 91 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:23:44,113 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:23:44,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89741218] [2021-06-12 19:23:44,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89741218] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:44,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539967990] [2021-06-12 19:23:44,114 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-12 19:23:44,157 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-12 19:23:44,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:23:44,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 19:23:44,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:23:44,288 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 88 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:44,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1539967990] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:44,288 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:23:44,288 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17] total 19 [2021-06-12 19:23:44,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267027600] [2021-06-12 19:23:44,289 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 19:23:44,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:23:44,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 19:23:44,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=250, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:23:44,289 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) [2021-06-12 19:23:44,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:23:44,648 INFO L93 Difference]: Finished difference Result 15741 states and 40619 transitions. [2021-06-12 19:23:44,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 19:23:44,648 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 [2021-06-12 19:23:44,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:23:44,667 INFO L225 Difference]: With dead ends: 15741 [2021-06-12 19:23:44,667 INFO L226 Difference]: Without dead ends: 15735 [2021-06-12 19:23:44,667 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 130.9ms TimeCoverageRelationStatistics Valid=135, Invalid=285, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:23:44,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15735 states. [2021-06-12 19:23:44,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15735 to 14730. [2021-06-12 19:23:44,850 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) [2021-06-12 19:23:44,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14730 states to 14730 states and 38625 transitions. [2021-06-12 19:23:44,874 INFO L78 Accepts]: Start accepts. Automaton has 14730 states and 38625 transitions. Word has length 59 [2021-06-12 19:23:44,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:23:44,874 INFO L482 AbstractCegarLoop]: Abstraction has 14730 states and 38625 transitions. [2021-06-12 19:23:44,874 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) [2021-06-12 19:23:44,874 INFO L276 IsEmpty]: Start isEmpty. Operand 14730 states and 38625 transitions. [2021-06-12 19:23:44,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-12 19:23:44,884 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:23:44,884 INFO L472 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:23:45,084 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 409 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable851 [2021-06-12 19:23:45,085 INFO L430 AbstractCegarLoop]: === Iteration 418 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:23:45,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:23:45,085 INFO L82 PathProgramCache]: Analyzing trace with hash 925621557, now seen corresponding path program 114 times [2021-06-12 19:23:45,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:23:45,085 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737518446] [2021-06-12 19:23:45,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:23:45,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:23:45,178 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 9 proven. 165 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:23:45,178 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:23:45,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737518446] [2021-06-12 19:23:45,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737518446] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:45,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560762115] [2021-06-12 19:23:45,178 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 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 [2021-06-12 19:23:45,210 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-06-12 19:23:45,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:23:45,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 19:23:45,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:23:45,296 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 8 proven. 166 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:23:45,296 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [560762115] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:45,296 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:23:45,296 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-12 19:23:45,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134619878] [2021-06-12 19:23:45,297 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 19:23:45,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:23:45,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 19:23:45,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:23:45,297 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) [2021-06-12 19:23:45,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:23:45,799 INFO L93 Difference]: Finished difference Result 16762 states and 42638 transitions. [2021-06-12 19:23:45,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 19:23:45,799 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 [2021-06-12 19:23:45,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:23:45,818 INFO L225 Difference]: With dead ends: 16762 [2021-06-12 19:23:45,819 INFO L226 Difference]: Without dead ends: 16710 [2021-06-12 19:23:45,819 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 148.9ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:23:45,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16710 states. [2021-06-12 19:23:45,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16710 to 14900. [2021-06-12 19:23:46,006 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) [2021-06-12 19:23:46,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14900 states to 14900 states and 39030 transitions. [2021-06-12 19:23:46,031 INFO L78 Accepts]: Start accepts. Automaton has 14900 states and 39030 transitions. Word has length 59 [2021-06-12 19:23:46,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:23:46,031 INFO L482 AbstractCegarLoop]: Abstraction has 14900 states and 39030 transitions. [2021-06-12 19:23:46,031 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) [2021-06-12 19:23:46,031 INFO L276 IsEmpty]: Start isEmpty. Operand 14900 states and 39030 transitions. [2021-06-12 19:23:46,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-12 19:23:46,041 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:23:46,041 INFO L472 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:23:46,242 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 410 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable854 [2021-06-12 19:23:46,242 INFO L430 AbstractCegarLoop]: === Iteration 419 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:23:46,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:23:46,242 INFO L82 PathProgramCache]: Analyzing trace with hash -1869012747, now seen corresponding path program 246 times [2021-06-12 19:23:46,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:23:46,242 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224567126] [2021-06-12 19:23:46,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:23:46,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:23:46,400 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 20 proven. 154 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:23:46,401 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:23:46,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224567126] [2021-06-12 19:23:46,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224567126] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:46,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471286671] [2021-06-12 19:23:46,401 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 [2021-06-12 19:23:46,433 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-06-12 19:23:46,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:23:46,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 19:23:46,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:23:46,533 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 15 proven. 159 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:23:46,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [471286671] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:46,533 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:23:46,533 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-12 19:23:46,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602665406] [2021-06-12 19:23:46,534 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 19:23:46,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:23:46,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 19:23:46,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:23:46,534 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) [2021-06-12 19:23:47,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:23:47,272 INFO L93 Difference]: Finished difference Result 15921 states and 40869 transitions. [2021-06-12 19:23:47,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 19:23:47,272 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 [2021-06-12 19:23:47,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:23:47,292 INFO L225 Difference]: With dead ends: 15921 [2021-06-12 19:23:47,292 INFO L226 Difference]: Without dead ends: 15883 [2021-06-12 19:23:47,292 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 150.9ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:23:47,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15883 states. [2021-06-12 19:23:47,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15883 to 14906. [2021-06-12 19:23:47,488 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) [2021-06-12 19:23:47,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14906 states to 14906 states and 39011 transitions. [2021-06-12 19:23:47,513 INFO L78 Accepts]: Start accepts. Automaton has 14906 states and 39011 transitions. Word has length 59 [2021-06-12 19:23:47,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:23:47,514 INFO L482 AbstractCegarLoop]: Abstraction has 14906 states and 39011 transitions. [2021-06-12 19:23:47,514 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) [2021-06-12 19:23:47,514 INFO L276 IsEmpty]: Start isEmpty. Operand 14906 states and 39011 transitions. [2021-06-12 19:23:47,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-12 19:23:47,524 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:23:47,524 INFO L472 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:23:47,724 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 411 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable855 [2021-06-12 19:23:47,724 INFO L430 AbstractCegarLoop]: === Iteration 420 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:23:47,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:23:47,725 INFO L82 PathProgramCache]: Analyzing trace with hash 1812418369, now seen corresponding path program 247 times [2021-06-12 19:23:47,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:23:47,725 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344606522] [2021-06-12 19:23:47,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:23:47,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:23:47,819 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 155 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-12 19:23:47,819 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:23:47,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344606522] [2021-06-12 19:23:47,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344606522] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:47,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820202968] [2021-06-12 19:23:47,819 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-12 19:23:47,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:23:47,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 19:23:47,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:23:47,934 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 156 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-12 19:23:47,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820202968] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:47,935 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:23:47,935 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-12 19:23:47,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544070708] [2021-06-12 19:23:47,935 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 19:23:47,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:23:47,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 19:23:47,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:23:47,935 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) [2021-06-12 19:23:48,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:23:48,514 INFO L93 Difference]: Finished difference Result 16341 states and 41812 transitions. [2021-06-12 19:23:48,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 19:23:48,515 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 [2021-06-12 19:23:48,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:23:48,536 INFO L225 Difference]: With dead ends: 16341 [2021-06-12 19:23:48,536 INFO L226 Difference]: Without dead ends: 16329 [2021-06-12 19:23:48,536 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 149.9ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:23:48,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16329 states. [2021-06-12 19:23:48,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16329 to 14918. [2021-06-12 19:23:48,797 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) [2021-06-12 19:23:48,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14918 states to 14918 states and 39032 transitions. [2021-06-12 19:23:48,823 INFO L78 Accepts]: Start accepts. Automaton has 14918 states and 39032 transitions. Word has length 59 [2021-06-12 19:23:48,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:23:48,823 INFO L482 AbstractCegarLoop]: Abstraction has 14918 states and 39032 transitions. [2021-06-12 19:23:48,823 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) [2021-06-12 19:23:48,823 INFO L276 IsEmpty]: Start isEmpty. Operand 14918 states and 39032 transitions. [2021-06-12 19:23:48,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-12 19:23:48,834 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:23:48,834 INFO L472 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:23:49,034 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 412 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable856 [2021-06-12 19:23:49,034 INFO L430 AbstractCegarLoop]: === Iteration 421 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:23:49,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:23:49,035 INFO L82 PathProgramCache]: Analyzing trace with hash 164060866, now seen corresponding path program 248 times [2021-06-12 19:23:49,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:23:49,035 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312610164] [2021-06-12 19:23:49,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:23:49,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:23:49,119 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 80 proven. 96 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:23:49,119 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:23:49,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312610164] [2021-06-12 19:23:49,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312610164] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:49,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847207267] [2021-06-12 19:23:49,119 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 413 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 413 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:23:49,155 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:23:49,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:23:49,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 19:23:49,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:23:49,253 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 80 proven. 96 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:23:49,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1847207267] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:49,254 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:23:49,254 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-12 19:23:49,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20775798] [2021-06-12 19:23:49,254 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 19:23:49,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:23:49,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 19:23:49,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:23:49,254 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) [2021-06-12 19:23:49,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:23:49,499 INFO L93 Difference]: Finished difference Result 16558 states and 41906 transitions. [2021-06-12 19:23:49,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:23:49,500 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 [2021-06-12 19:23:49,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:23:49,520 INFO L225 Difference]: With dead ends: 16558 [2021-06-12 19:23:49,520 INFO L226 Difference]: Without dead ends: 16534 [2021-06-12 19:23:49,520 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 98.6ms TimeCoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:23:49,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16534 states. [2021-06-12 19:23:49,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16534 to 14871. [2021-06-12 19:23:49,694 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) [2021-06-12 19:23:49,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14871 states to 14871 states and 38857 transitions. [2021-06-12 19:23:49,716 INFO L78 Accepts]: Start accepts. Automaton has 14871 states and 38857 transitions. Word has length 59 [2021-06-12 19:23:49,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:23:49,717 INFO L482 AbstractCegarLoop]: Abstraction has 14871 states and 38857 transitions. [2021-06-12 19:23:49,717 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) [2021-06-12 19:23:49,717 INFO L276 IsEmpty]: Start isEmpty. Operand 14871 states and 38857 transitions. [2021-06-12 19:23:49,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-12 19:23:49,726 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:23:49,726 INFO L472 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:23:49,926 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable857,413 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:23:49,926 INFO L430 AbstractCegarLoop]: === Iteration 422 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:23:49,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:23:49,927 INFO L82 PathProgramCache]: Analyzing trace with hash -340631593, now seen corresponding path program 249 times [2021-06-12 19:23:49,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:23:49,927 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984957872] [2021-06-12 19:23:49,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:23:49,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:23:50,020 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 160 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:23:50,020 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:23:50,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984957872] [2021-06-12 19:23:50,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984957872] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:50,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514509352] [2021-06-12 19:23:50,020 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 [2021-06-12 19:23:50,053 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-06-12 19:23:50,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:23:50,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 19:23:50,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:23:50,140 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 160 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:23:50,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [514509352] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:50,140 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:23:50,140 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-12 19:23:50,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984893000] [2021-06-12 19:23:50,140 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:23:50,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:23:50,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:23:50,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:23:50,141 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) [2021-06-12 19:23:50,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:23:50,817 INFO L93 Difference]: Finished difference Result 17148 states and 43479 transitions. [2021-06-12 19:23:50,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 19:23:50,818 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 [2021-06-12 19:23:50,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:23:50,837 INFO L225 Difference]: With dead ends: 17148 [2021-06-12 19:23:50,837 INFO L226 Difference]: Without dead ends: 17136 [2021-06-12 19:23:50,837 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 178.9ms TimeCoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:23:50,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17136 states. [2021-06-12 19:23:51,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17136 to 14915. [2021-06-12 19:23:51,022 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) [2021-06-12 19:23:51,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14915 states to 14915 states and 38969 transitions. [2021-06-12 19:23:51,047 INFO L78 Accepts]: Start accepts. Automaton has 14915 states and 38969 transitions. Word has length 59 [2021-06-12 19:23:51,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:23:51,047 INFO L482 AbstractCegarLoop]: Abstraction has 14915 states and 38969 transitions. [2021-06-12 19:23:51,047 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) [2021-06-12 19:23:51,047 INFO L276 IsEmpty]: Start isEmpty. Operand 14915 states and 38969 transitions. [2021-06-12 19:23:51,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-12 19:23:51,133 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:23:51,133 INFO L472 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:23:51,334 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 414 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable860 [2021-06-12 19:23:51,334 INFO L430 AbstractCegarLoop]: === Iteration 423 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:23:51,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:23:51,334 INFO L82 PathProgramCache]: Analyzing trace with hash -578693110, now seen corresponding path program 115 times [2021-06-12 19:23:51,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:23:51,334 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174536697] [2021-06-12 19:23:51,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:23:51,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:23:51,403 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 108 proven. 70 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:23:51,403 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:23:51,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174536697] [2021-06-12 19:23:51,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174536697] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:51,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798263711] [2021-06-12 19:23:51,403 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 [2021-06-12 19:23:51,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:23:51,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 19:23:51,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:23:51,520 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 109 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:51,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [798263711] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:51,520 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:23:51,520 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 12 [2021-06-12 19:23:51,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468663851] [2021-06-12 19:23:51,520 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:23:51,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:23:51,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:23:51,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:23:51,520 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) [2021-06-12 19:23:51,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:23:51,731 INFO L93 Difference]: Finished difference Result 19459 states and 48107 transitions. [2021-06-12 19:23:51,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:23:51,732 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 [2021-06-12 19:23:51,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:23:51,755 INFO L225 Difference]: With dead ends: 19459 [2021-06-12 19:23:51,756 INFO L226 Difference]: Without dead ends: 19451 [2021-06-12 19:23:51,756 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 76.1ms TimeCoverageRelationStatistics Valid=88, Invalid=122, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:23:51,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19451 states. [2021-06-12 19:23:51,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19451 to 15127. [2021-06-12 19:23:51,953 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) [2021-06-12 19:23:51,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15127 states to 15127 states and 39619 transitions. [2021-06-12 19:23:51,975 INFO L78 Accepts]: Start accepts. Automaton has 15127 states and 39619 transitions. Word has length 59 [2021-06-12 19:23:51,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:23:51,976 INFO L482 AbstractCegarLoop]: Abstraction has 15127 states and 39619 transitions. [2021-06-12 19:23:51,976 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) [2021-06-12 19:23:51,976 INFO L276 IsEmpty]: Start isEmpty. Operand 15127 states and 39619 transitions. [2021-06-12 19:23:51,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-12 19:23:51,985 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:23:51,985 INFO L472 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:23:52,185 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 415 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable861 [2021-06-12 19:23:52,185 INFO L430 AbstractCegarLoop]: === Iteration 424 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:23:52,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:23:52,185 INFO L82 PathProgramCache]: Analyzing trace with hash -1200573520, now seen corresponding path program 116 times [2021-06-12 19:23:52,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:23:52,186 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222347655] [2021-06-12 19:23:52,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:23:52,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:23:52,265 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 108 proven. 69 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:23:52,265 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:23:52,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222347655] [2021-06-12 19:23:52,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222347655] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:52,265 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983132388] [2021-06-12 19:23:52,265 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 [2021-06-12 19:23:52,294 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:23:52,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:23:52,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 19:23:52,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:23:52,388 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 109 proven. 69 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:23:52,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1983132388] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:52,388 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:23:52,388 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 12 [2021-06-12 19:23:52,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434653014] [2021-06-12 19:23:52,388 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:23:52,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:23:52,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:23:52,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:23:52,389 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) [2021-06-12 19:23:52,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:23:52,605 INFO L93 Difference]: Finished difference Result 21539 states and 52894 transitions. [2021-06-12 19:23:52,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:23:52,606 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 [2021-06-12 19:23:52,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:23:52,630 INFO L225 Difference]: With dead ends: 21539 [2021-06-12 19:23:52,631 INFO L226 Difference]: Without dead ends: 21539 [2021-06-12 19:23:52,631 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 88.9ms TimeCoverageRelationStatistics Valid=88, Invalid=122, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:23:52,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21539 states. [2021-06-12 19:23:52,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21539 to 15133. [2021-06-12 19:23:52,844 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) [2021-06-12 19:23:52,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15133 states to 15133 states and 39631 transitions. [2021-06-12 19:23:52,869 INFO L78 Accepts]: Start accepts. Automaton has 15133 states and 39631 transitions. Word has length 59 [2021-06-12 19:23:52,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:23:52,869 INFO L482 AbstractCegarLoop]: Abstraction has 15133 states and 39631 transitions. [2021-06-12 19:23:52,869 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) [2021-06-12 19:23:52,869 INFO L276 IsEmpty]: Start isEmpty. Operand 15133 states and 39631 transitions. [2021-06-12 19:23:52,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-12 19:23:52,879 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:23:52,879 INFO L472 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:23:53,079 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable863,416 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:23:53,080 INFO L430 AbstractCegarLoop]: === Iteration 425 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:23:53,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:23:53,080 INFO L82 PathProgramCache]: Analyzing trace with hash 1456821320, now seen corresponding path program 117 times [2021-06-12 19:23:53,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:23:53,080 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641377223] [2021-06-12 19:23:53,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:23:53,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:23:53,159 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 103 proven. 75 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:23:53,159 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:23:53,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641377223] [2021-06-12 19:23:53,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641377223] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:53,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501504428] [2021-06-12 19:23:53,159 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 [2021-06-12 19:23:53,192 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-12 19:23:53,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:23:53,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 19:23:53,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:23:53,286 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 104 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:23:53,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [501504428] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:53,286 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:23:53,286 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 13 [2021-06-12 19:23:53,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487398211] [2021-06-12 19:23:53,286 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:23:53,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:23:53,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:23:53,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:23:53,286 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) [2021-06-12 19:23:53,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:23:53,556 INFO L93 Difference]: Finished difference Result 19875 states and 49164 transitions. [2021-06-12 19:23:53,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:23:53,557 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 [2021-06-12 19:23:53,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:23:53,579 INFO L225 Difference]: With dead ends: 19875 [2021-06-12 19:23:53,579 INFO L226 Difference]: Without dead ends: 19875 [2021-06-12 19:23:53,580 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 99.3ms TimeCoverageRelationStatistics Valid=107, Invalid=165, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:23:53,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19875 states. [2021-06-12 19:23:53,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19875 to 14798. [2021-06-12 19:23:53,784 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) [2021-06-12 19:23:53,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14798 states to 14798 states and 38607 transitions. [2021-06-12 19:23:53,807 INFO L78 Accepts]: Start accepts. Automaton has 14798 states and 38607 transitions. Word has length 59 [2021-06-12 19:23:53,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:23:53,807 INFO L482 AbstractCegarLoop]: Abstraction has 14798 states and 38607 transitions. [2021-06-12 19:23:53,807 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) [2021-06-12 19:23:53,807 INFO L276 IsEmpty]: Start isEmpty. Operand 14798 states and 38607 transitions. [2021-06-12 19:23:53,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-12 19:23:53,816 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:23:53,816 INFO L472 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:23:54,016 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 417 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable864 [2021-06-12 19:23:54,017 INFO L430 AbstractCegarLoop]: === Iteration 426 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:23:54,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:23:54,017 INFO L82 PathProgramCache]: Analyzing trace with hash 1191927516, now seen corresponding path program 250 times [2021-06-12 19:23:54,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:23:54,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641227182] [2021-06-12 19:23:54,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:23:54,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:23:54,115 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 81 proven. 97 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:23:54,115 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:23:54,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641227182] [2021-06-12 19:23:54,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641227182] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:54,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289732217] [2021-06-12 19:23:54,115 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 [2021-06-12 19:23:54,143 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:23:54,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:23:54,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 19:23:54,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:23:54,228 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 81 proven. 97 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:23:54,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [289732217] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:54,228 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:23:54,228 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-06-12 19:23:54,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253606811] [2021-06-12 19:23:54,228 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:23:54,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:23:54,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:23:54,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:23:54,229 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) [2021-06-12 19:23:54,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:23:54,462 INFO L93 Difference]: Finished difference Result 16237 states and 41157 transitions. [2021-06-12 19:23:54,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:23:54,462 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 [2021-06-12 19:23:54,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:23:54,479 INFO L225 Difference]: With dead ends: 16237 [2021-06-12 19:23:54,480 INFO L226 Difference]: Without dead ends: 16219 [2021-06-12 19:23:54,480 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 113.9ms TimeCoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:23:54,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16219 states. [2021-06-12 19:23:54,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16219 to 14798. [2021-06-12 19:23:54,643 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) [2021-06-12 19:23:54,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14798 states to 14798 states and 38595 transitions. [2021-06-12 19:23:54,667 INFO L78 Accepts]: Start accepts. Automaton has 14798 states and 38595 transitions. Word has length 59 [2021-06-12 19:23:54,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:23:54,667 INFO L482 AbstractCegarLoop]: Abstraction has 14798 states and 38595 transitions. [2021-06-12 19:23:54,667 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) [2021-06-12 19:23:54,667 INFO L276 IsEmpty]: Start isEmpty. Operand 14798 states and 38595 transitions. [2021-06-12 19:23:54,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-12 19:23:54,677 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:23:54,677 INFO L472 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:23:54,877 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable865,418 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:23:54,877 INFO L430 AbstractCegarLoop]: === Iteration 427 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:23:54,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:23:54,877 INFO L82 PathProgramCache]: Analyzing trace with hash 2094564251, now seen corresponding path program 118 times [2021-06-12 19:23:54,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:23:54,877 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565552780] [2021-06-12 19:23:54,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:23:54,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:23:54,988 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 9 proven. 165 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:23:54,989 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:23:54,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565552780] [2021-06-12 19:23:54,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565552780] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:54,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773076479] [2021-06-12 19:23:54,989 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 [2021-06-12 19:23:55,025 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:23:55,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:23:55,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 19:23:55,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:23:55,111 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 8 proven. 166 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:23:55,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1773076479] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:55,111 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:23:55,111 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-12 19:23:55,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111057998] [2021-06-12 19:23:55,111 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 19:23:55,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:23:55,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 19:23:55,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:23:55,112 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) [2021-06-12 19:23:55,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:23:55,631 INFO L93 Difference]: Finished difference Result 16875 states and 42676 transitions. [2021-06-12 19:23:55,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 19:23:55,632 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 [2021-06-12 19:23:55,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:23:55,652 INFO L225 Difference]: With dead ends: 16875 [2021-06-12 19:23:55,652 INFO L226 Difference]: Without dead ends: 16832 [2021-06-12 19:23:55,652 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 157.8ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:23:55,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16832 states. [2021-06-12 19:23:55,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16832 to 14910. [2021-06-12 19:23:55,874 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) [2021-06-12 19:23:55,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14910 states to 14910 states and 38888 transitions. [2021-06-12 19:23:55,896 INFO L78 Accepts]: Start accepts. Automaton has 14910 states and 38888 transitions. Word has length 59 [2021-06-12 19:23:55,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:23:55,896 INFO L482 AbstractCegarLoop]: Abstraction has 14910 states and 38888 transitions. [2021-06-12 19:23:55,896 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) [2021-06-12 19:23:55,896 INFO L276 IsEmpty]: Start isEmpty. Operand 14910 states and 38888 transitions. [2021-06-12 19:23:55,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-12 19:23:55,905 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:23:55,905 INFO L472 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:23:56,105 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 419 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable869 [2021-06-12 19:23:56,105 INFO L430 AbstractCegarLoop]: === Iteration 428 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:23:56,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:23:56,105 INFO L82 PathProgramCache]: Analyzing trace with hash 540867394, now seen corresponding path program 251 times [2021-06-12 19:23:56,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:23:56,105 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088081892] [2021-06-12 19:23:56,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:23:56,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:23:56,164 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 69 proven. 105 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-12 19:23:56,164 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:23:56,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088081892] [2021-06-12 19:23:56,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088081892] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:56,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027928946] [2021-06-12 19:23:56,165 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 [2021-06-12 19:23:56,196 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-06-12 19:23:56,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:23:56,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 19:23:56,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:23:56,312 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 73 proven. 105 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:23:56,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1027928946] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:56,312 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:23:56,312 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14] total 16 [2021-06-12 19:23:56,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944812196] [2021-06-12 19:23:56,312 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:23:56,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:23:56,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:23:56,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:23:56,312 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) [2021-06-12 19:23:56,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:23:56,569 INFO L93 Difference]: Finished difference Result 17259 states and 43116 transitions. [2021-06-12 19:23:56,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:23:56,570 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 [2021-06-12 19:23:56,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:23:56,587 INFO L225 Difference]: With dead ends: 17259 [2021-06-12 19:23:56,587 INFO L226 Difference]: Without dead ends: 17256 [2021-06-12 19:23:56,588 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 89.4ms TimeCoverageRelationStatistics Valid=104, Invalid=202, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:23:56,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17256 states. [2021-06-12 19:23:56,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17256 to 14884. [2021-06-12 19:23:56,760 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) [2021-06-12 19:23:56,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14884 states to 14884 states and 38793 transitions. [2021-06-12 19:23:56,783 INFO L78 Accepts]: Start accepts. Automaton has 14884 states and 38793 transitions. Word has length 59 [2021-06-12 19:23:56,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:23:56,783 INFO L482 AbstractCegarLoop]: Abstraction has 14884 states and 38793 transitions. [2021-06-12 19:23:56,783 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) [2021-06-12 19:23:56,783 INFO L276 IsEmpty]: Start isEmpty. Operand 14884 states and 38793 transitions. [2021-06-12 19:23:56,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-12 19:23:56,793 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:23:56,793 INFO L472 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:23:56,993 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 420 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable870 [2021-06-12 19:23:56,993 INFO L430 AbstractCegarLoop]: === Iteration 429 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:23:56,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:23:56,994 INFO L82 PathProgramCache]: Analyzing trace with hash 747929960, now seen corresponding path program 252 times [2021-06-12 19:23:56,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:23:56,994 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601663492] [2021-06-12 19:23:56,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:23:56,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:23:57,061 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 65 proven. 109 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-12 19:23:57,061 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:23:57,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601663492] [2021-06-12 19:23:57,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601663492] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:57,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290246790] [2021-06-12 19:23:57,061 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 [2021-06-12 19:23:57,093 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-06-12 19:23:57,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:23:57,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 19:23:57,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:23:57,179 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 65 proven. 109 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-12 19:23:57,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [290246790] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:57,179 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:23:57,179 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-12 19:23:57,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923455460] [2021-06-12 19:23:57,180 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 19:23:57,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:23:57,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 19:23:57,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:23:57,180 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) [2021-06-12 19:23:57,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:23:57,419 INFO L93 Difference]: Finished difference Result 17001 states and 42513 transitions. [2021-06-12 19:23:57,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:23:57,419 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 [2021-06-12 19:23:57,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:23:57,440 INFO L225 Difference]: With dead ends: 17001 [2021-06-12 19:23:57,440 INFO L226 Difference]: Without dead ends: 16983 [2021-06-12 19:23:57,440 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 77.9ms TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:23:57,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16983 states. [2021-06-12 19:23:57,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16983 to 14884. [2021-06-12 19:23:57,636 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) [2021-06-12 19:23:57,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14884 states to 14884 states and 38773 transitions. [2021-06-12 19:23:57,660 INFO L78 Accepts]: Start accepts. Automaton has 14884 states and 38773 transitions. Word has length 59 [2021-06-12 19:23:57,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:23:57,660 INFO L482 AbstractCegarLoop]: Abstraction has 14884 states and 38773 transitions. [2021-06-12 19:23:57,660 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) [2021-06-12 19:23:57,660 INFO L276 IsEmpty]: Start isEmpty. Operand 14884 states and 38773 transitions. [2021-06-12 19:23:57,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-12 19:23:57,743 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:23:57,743 INFO L472 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:23:57,944 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 421 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable872 [2021-06-12 19:23:57,944 INFO L430 AbstractCegarLoop]: === Iteration 430 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:23:57,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:23:57,944 INFO L82 PathProgramCache]: Analyzing trace with hash -700070053, now seen corresponding path program 253 times [2021-06-12 19:23:57,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:23:57,944 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024048558] [2021-06-12 19:23:57,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:23:57,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:23:58,032 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 20 proven. 154 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:23:58,032 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:23:58,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024048558] [2021-06-12 19:23:58,032 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024048558] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:58,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447552311] [2021-06-12 19:23:58,032 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 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 [2021-06-12 19:23:58,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:23:58,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 19:23:58,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:23:58,160 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 15 proven. 159 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:23:58,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [447552311] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:58,161 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:23:58,161 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-12 19:23:58,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188281049] [2021-06-12 19:23:58,161 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 19:23:58,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:23:58,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 19:23:58,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:23:58,161 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) [2021-06-12 19:23:58,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:23:58,925 INFO L93 Difference]: Finished difference Result 16014 states and 40804 transitions. [2021-06-12 19:23:58,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 19:23:58,925 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 [2021-06-12 19:23:58,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:23:58,944 INFO L225 Difference]: With dead ends: 16014 [2021-06-12 19:23:58,944 INFO L226 Difference]: Without dead ends: 15958 [2021-06-12 19:23:58,945 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 150.3ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:23:58,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15958 states. [2021-06-12 19:23:59,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15958 to 14911. [2021-06-12 19:23:59,126 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) [2021-06-12 19:23:59,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14911 states to 14911 states and 38796 transitions. [2021-06-12 19:23:59,151 INFO L78 Accepts]: Start accepts. Automaton has 14911 states and 38796 transitions. Word has length 59 [2021-06-12 19:23:59,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:23:59,151 INFO L482 AbstractCegarLoop]: Abstraction has 14911 states and 38796 transitions. [2021-06-12 19:23:59,151 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) [2021-06-12 19:23:59,151 INFO L276 IsEmpty]: Start isEmpty. Operand 14911 states and 38796 transitions. [2021-06-12 19:23:59,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-12 19:23:59,161 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:23:59,161 INFO L472 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:23:59,361 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable875,422 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:23:59,361 INFO L430 AbstractCegarLoop]: === Iteration 431 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:23:59,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:23:59,362 INFO L82 PathProgramCache]: Analyzing trace with hash -1313606233, now seen corresponding path program 254 times [2021-06-12 19:23:59,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:23:59,362 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098668687] [2021-06-12 19:23:59,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:23:59,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:23:59,457 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 155 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-12 19:23:59,458 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:23:59,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098668687] [2021-06-12 19:23:59,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098668687] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:59,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250867585] [2021-06-12 19:23:59,458 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 [2021-06-12 19:23:59,487 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:23:59,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:23:59,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 19:23:59,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:23:59,574 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 156 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-12 19:23:59,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [250867585] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:23:59,575 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:23:59,575 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-12 19:23:59,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369643051] [2021-06-12 19:23:59,575 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 19:23:59,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:23:59,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 19:23:59,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:23:59,575 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) [2021-06-12 19:24:00,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:24:00,137 INFO L93 Difference]: Finished difference Result 16567 states and 42026 transitions. [2021-06-12 19:24:00,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 19:24:00,138 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 [2021-06-12 19:24:00,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:24:00,157 INFO L225 Difference]: With dead ends: 16567 [2021-06-12 19:24:00,158 INFO L226 Difference]: Without dead ends: 16555 [2021-06-12 19:24:00,158 INFO L728 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 [2021-06-12 19:24:00,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16555 states. [2021-06-12 19:24:00,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16555 to 14947. [2021-06-12 19:24:00,406 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) [2021-06-12 19:24:00,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14947 states to 14947 states and 38874 transitions. [2021-06-12 19:24:00,431 INFO L78 Accepts]: Start accepts. Automaton has 14947 states and 38874 transitions. Word has length 59 [2021-06-12 19:24:00,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:24:00,431 INFO L482 AbstractCegarLoop]: Abstraction has 14947 states and 38874 transitions. [2021-06-12 19:24:00,431 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) [2021-06-12 19:24:00,431 INFO L276 IsEmpty]: Start isEmpty. Operand 14947 states and 38874 transitions. [2021-06-12 19:24:00,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-12 19:24:00,442 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:24:00,442 INFO L472 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:24:00,642 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 423 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable876 [2021-06-12 19:24:00,642 INFO L430 AbstractCegarLoop]: === Iteration 432 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:24:00,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:24:00,642 INFO L82 PathProgramCache]: Analyzing trace with hash -1470905720, now seen corresponding path program 119 times [2021-06-12 19:24:00,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:24:00,643 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088753538] [2021-06-12 19:24:00,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:24:00,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:24:00,711 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 103 proven. 74 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:24:00,711 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:24:00,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088753538] [2021-06-12 19:24:00,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088753538] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:00,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119549884] [2021-06-12 19:24:00,712 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 [2021-06-12 19:24:00,744 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-06-12 19:24:00,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:24:00,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 19:24:00,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:24:00,849 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 105 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:24:00,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [119549884] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:00,849 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:24:00,849 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 14 [2021-06-12 19:24:00,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190118471] [2021-06-12 19:24:00,849 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:24:00,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:24:00,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:24:00,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:24:00,850 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) [2021-06-12 19:24:01,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:24:01,086 INFO L93 Difference]: Finished difference Result 19543 states and 48102 transitions. [2021-06-12 19:24:01,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 19:24:01,086 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 [2021-06-12 19:24:01,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:24:01,108 INFO L225 Difference]: With dead ends: 19543 [2021-06-12 19:24:01,109 INFO L226 Difference]: Without dead ends: 19523 [2021-06-12 19:24:01,109 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 99.8ms TimeCoverageRelationStatistics Valid=113, Invalid=193, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:24:01,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19523 states. [2021-06-12 19:24:01,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19523 to 15262. [2021-06-12 19:24:01,316 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) [2021-06-12 19:24:01,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15262 states to 15262 states and 39813 transitions. [2021-06-12 19:24:01,340 INFO L78 Accepts]: Start accepts. Automaton has 15262 states and 39813 transitions. Word has length 59 [2021-06-12 19:24:01,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:24:01,340 INFO L482 AbstractCegarLoop]: Abstraction has 15262 states and 39813 transitions. [2021-06-12 19:24:01,340 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) [2021-06-12 19:24:01,340 INFO L276 IsEmpty]: Start isEmpty. Operand 15262 states and 39813 transitions. [2021-06-12 19:24:01,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-12 19:24:01,350 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:24:01,350 INFO L472 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:24:01,551 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable877,424 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:24:01,551 INFO L430 AbstractCegarLoop]: === Iteration 433 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:24:01,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:24:01,551 INFO L82 PathProgramCache]: Analyzing trace with hash 828311101, now seen corresponding path program 255 times [2021-06-12 19:24:01,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:24:01,551 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248217768] [2021-06-12 19:24:01,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:24:01,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:24:01,645 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 157 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:24:01,646 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:24:01,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248217768] [2021-06-12 19:24:01,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248217768] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:01,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454166703] [2021-06-12 19:24:01,646 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 [2021-06-12 19:24:01,679 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-06-12 19:24:01,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:24:01,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 19:24:01,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:24:01,764 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 158 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:24:01,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [454166703] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:01,764 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:24:01,764 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-12 19:24:01,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358308581] [2021-06-12 19:24:01,764 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:24:01,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:24:01,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:24:01,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:24:01,765 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) [2021-06-12 19:24:02,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:24:02,422 INFO L93 Difference]: Finished difference Result 18379 states and 46239 transitions. [2021-06-12 19:24:02,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 19:24:02,422 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 [2021-06-12 19:24:02,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:24:02,443 INFO L225 Difference]: With dead ends: 18379 [2021-06-12 19:24:02,443 INFO L226 Difference]: Without dead ends: 18337 [2021-06-12 19:24:02,443 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 196.3ms TimeCoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:24:02,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18337 states. [2021-06-12 19:24:02,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18337 to 15333. [2021-06-12 19:24:02,700 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) [2021-06-12 19:24:02,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15333 states to 15333 states and 40005 transitions. [2021-06-12 19:24:02,723 INFO L78 Accepts]: Start accepts. Automaton has 15333 states and 40005 transitions. Word has length 59 [2021-06-12 19:24:02,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:24:02,723 INFO L482 AbstractCegarLoop]: Abstraction has 15333 states and 40005 transitions. [2021-06-12 19:24:02,723 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) [2021-06-12 19:24:02,724 INFO L276 IsEmpty]: Start isEmpty. Operand 15333 states and 40005 transitions. [2021-06-12 19:24:02,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-12 19:24:02,733 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:24:02,733 INFO L472 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:24:02,933 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable880,425 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:24:02,933 INFO L430 AbstractCegarLoop]: === Iteration 434 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:24:02,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:24:02,934 INFO L82 PathProgramCache]: Analyzing trace with hash -1934097086, now seen corresponding path program 256 times [2021-06-12 19:24:02,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:24:02,934 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698814752] [2021-06-12 19:24:02,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:24:02,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:24:03,009 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 63 proven. 114 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:24:03,009 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:24:03,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698814752] [2021-06-12 19:24:03,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698814752] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:03,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802283476] [2021-06-12 19:24:03,009 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 [2021-06-12 19:24:03,037 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:24:03,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:24:03,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 19:24:03,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:24:03,122 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 63 proven. 114 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:24:03,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1802283476] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:03,123 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:24:03,123 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-06-12 19:24:03,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099683831] [2021-06-12 19:24:03,123 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:24:03,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:24:03,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:24:03,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:24:03,123 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) [2021-06-12 19:24:03,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:24:03,370 INFO L93 Difference]: Finished difference Result 17426 states and 43666 transitions. [2021-06-12 19:24:03,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:24:03,370 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 [2021-06-12 19:24:03,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:24:03,392 INFO L225 Difference]: With dead ends: 17426 [2021-06-12 19:24:03,392 INFO L226 Difference]: Without dead ends: 17402 [2021-06-12 19:24:03,392 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 86.2ms TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:24:03,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17402 states. [2021-06-12 19:24:03,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17402 to 14978. [2021-06-12 19:24:03,604 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) [2021-06-12 19:24:03,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14978 states to 14978 states and 38992 transitions. [2021-06-12 19:24:03,629 INFO L78 Accepts]: Start accepts. Automaton has 14978 states and 38992 transitions. Word has length 59 [2021-06-12 19:24:03,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:24:03,629 INFO L482 AbstractCegarLoop]: Abstraction has 14978 states and 38992 transitions. [2021-06-12 19:24:03,629 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) [2021-06-12 19:24:03,629 INFO L276 IsEmpty]: Start isEmpty. Operand 14978 states and 38992 transitions. [2021-06-12 19:24:03,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-12 19:24:03,639 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:24:03,639 INFO L472 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:24:03,839 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable881,426 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:24:03,839 INFO L430 AbstractCegarLoop]: === Iteration 435 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:24:03,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:24:03,839 INFO L82 PathProgramCache]: Analyzing trace with hash 983147635, now seen corresponding path program 257 times [2021-06-12 19:24:03,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:24:03,840 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858411703] [2021-06-12 19:24:03,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:24:03,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:24:03,942 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 160 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:24:03,942 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:24:03,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858411703] [2021-06-12 19:24:03,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858411703] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:03,942 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985841019] [2021-06-12 19:24:03,942 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 [2021-06-12 19:24:03,975 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-06-12 19:24:03,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:24:03,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 19:24:03,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:24:04,062 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 160 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:24:04,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [985841019] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:04,062 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:24:04,062 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-12 19:24:04,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265630315] [2021-06-12 19:24:04,062 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:24:04,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:24:04,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:24:04,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:24:04,062 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) [2021-06-12 19:24:04,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:24:04,753 INFO L93 Difference]: Finished difference Result 18584 states and 46418 transitions. [2021-06-12 19:24:04,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 19:24:04,753 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 [2021-06-12 19:24:04,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:24:04,773 INFO L225 Difference]: With dead ends: 18584 [2021-06-12 19:24:04,773 INFO L226 Difference]: Without dead ends: 18530 [2021-06-12 19:24:04,774 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 214.9ms TimeCoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2021-06-12 19:24:04,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18530 states. [2021-06-12 19:24:05,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18530 to 14933. [2021-06-12 19:24:05,028 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) [2021-06-12 19:24:05,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14933 states to 14933 states and 38840 transitions. [2021-06-12 19:24:05,051 INFO L78 Accepts]: Start accepts. Automaton has 14933 states and 38840 transitions. Word has length 59 [2021-06-12 19:24:05,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:24:05,051 INFO L482 AbstractCegarLoop]: Abstraction has 14933 states and 38840 transitions. [2021-06-12 19:24:05,051 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) [2021-06-12 19:24:05,051 INFO L276 IsEmpty]: Start isEmpty. Operand 14933 states and 38840 transitions. [2021-06-12 19:24:05,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-12 19:24:05,059 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:24:05,059 INFO L472 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:24:05,260 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 427 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable885 [2021-06-12 19:24:05,260 INFO L430 AbstractCegarLoop]: === Iteration 436 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:24:05,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:24:05,260 INFO L82 PathProgramCache]: Analyzing trace with hash 123205708, now seen corresponding path program 120 times [2021-06-12 19:24:05,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:24:05,260 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274970615] [2021-06-12 19:24:05,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:24:05,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:24:05,328 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 124 proven. 53 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:24:05,328 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:24:05,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274970615] [2021-06-12 19:24:05,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274970615] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:05,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2002136611] [2021-06-12 19:24:05,328 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 [2021-06-12 19:24:05,360 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-06-12 19:24:05,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:24:05,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 19:24:05,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:24:05,454 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 125 proven. 53 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:24:05,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2002136611] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:05,454 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:24:05,455 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 12 [2021-06-12 19:24:05,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824718868] [2021-06-12 19:24:05,455 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:24:05,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:24:05,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:24:05,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:24:05,455 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) [2021-06-12 19:24:05,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:24:05,697 INFO L93 Difference]: Finished difference Result 22981 states and 56099 transitions. [2021-06-12 19:24:05,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:24:05,697 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 [2021-06-12 19:24:05,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:24:05,726 INFO L225 Difference]: With dead ends: 22981 [2021-06-12 19:24:05,726 INFO L226 Difference]: Without dead ends: 22981 [2021-06-12 19:24:05,726 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 86.5ms TimeCoverageRelationStatistics Valid=102, Invalid=138, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:24:05,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22981 states. [2021-06-12 19:24:05,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22981 to 15053. [2021-06-12 19:24:05,962 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) [2021-06-12 19:24:05,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15053 states to 15053 states and 39202 transitions. [2021-06-12 19:24:05,988 INFO L78 Accepts]: Start accepts. Automaton has 15053 states and 39202 transitions. Word has length 59 [2021-06-12 19:24:05,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:24:05,988 INFO L482 AbstractCegarLoop]: Abstraction has 15053 states and 39202 transitions. [2021-06-12 19:24:05,988 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) [2021-06-12 19:24:05,988 INFO L276 IsEmpty]: Start isEmpty. Operand 15053 states and 39202 transitions. [2021-06-12 19:24:05,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-12 19:24:05,999 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:24:05,999 INFO L472 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:24:06,199 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable886,428 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:24:06,199 INFO L430 AbstractCegarLoop]: === Iteration 437 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:24:06,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:24:06,200 INFO L82 PathProgramCache]: Analyzing trace with hash -1514366748, now seen corresponding path program 121 times [2021-06-12 19:24:06,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:24:06,200 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827209298] [2021-06-12 19:24:06,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:24:06,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:24:06,294 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 120 proven. 57 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:24:06,294 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:24:06,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827209298] [2021-06-12 19:24:06,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827209298] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:06,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274496444] [2021-06-12 19:24:06,294 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 [2021-06-12 19:24:06,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:24:06,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 19:24:06,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:24:06,457 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 121 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:24:06,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [274496444] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:06,457 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:24:06,457 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 13 [2021-06-12 19:24:06,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147443893] [2021-06-12 19:24:06,458 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:24:06,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:24:06,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:24:06,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:24:06,458 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) [2021-06-12 19:24:06,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:24:06,849 INFO L93 Difference]: Finished difference Result 22759 states and 55530 transitions. [2021-06-12 19:24:06,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 19:24:06,849 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 [2021-06-12 19:24:06,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:24:06,882 INFO L225 Difference]: With dead ends: 22759 [2021-06-12 19:24:06,883 INFO L226 Difference]: Without dead ends: 22759 [2021-06-12 19:24:06,883 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 134.8ms TimeCoverageRelationStatistics Valid=138, Invalid=204, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:24:06,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22759 states. [2021-06-12 19:24:07,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22759 to 15073. [2021-06-12 19:24:07,197 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) [2021-06-12 19:24:07,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15073 states to 15073 states and 39259 transitions. [2021-06-12 19:24:07,232 INFO L78 Accepts]: Start accepts. Automaton has 15073 states and 39259 transitions. Word has length 59 [2021-06-12 19:24:07,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:24:07,232 INFO L482 AbstractCegarLoop]: Abstraction has 15073 states and 39259 transitions. [2021-06-12 19:24:07,232 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) [2021-06-12 19:24:07,232 INFO L276 IsEmpty]: Start isEmpty. Operand 15073 states and 39259 transitions. [2021-06-12 19:24:07,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-12 19:24:07,246 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:24:07,246 INFO L472 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:24:07,467 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 429 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable887 [2021-06-12 19:24:07,468 INFO L430 AbstractCegarLoop]: === Iteration 438 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:24:07,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:24:07,468 INFO L82 PathProgramCache]: Analyzing trace with hash 1090605384, now seen corresponding path program 122 times [2021-06-12 19:24:07,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:24:07,468 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388830160] [2021-06-12 19:24:07,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:24:07,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:24:07,667 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2021-06-12 19:24:07,736 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 104 proven. 74 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:24:07,736 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:24:07,736 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388830160] [2021-06-12 19:24:07,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388830160] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:07,736 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651873730] [2021-06-12 19:24:07,736 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 [2021-06-12 19:24:07,775 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:24:07,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:24:07,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 19:24:07,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:24:07,944 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 105 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:24:07,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [651873730] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:07,944 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:24:07,944 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 14 [2021-06-12 19:24:07,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106643513] [2021-06-12 19:24:07,944 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:24:07,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:24:07,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:24:07,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:24:07,945 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) [2021-06-12 19:24:08,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:24:08,319 INFO L93 Difference]: Finished difference Result 19776 states and 48785 transitions. [2021-06-12 19:24:08,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:24:08,319 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 [2021-06-12 19:24:08,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:24:08,348 INFO L225 Difference]: With dead ends: 19776 [2021-06-12 19:24:08,348 INFO L226 Difference]: Without dead ends: 19776 [2021-06-12 19:24:08,349 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 299.9ms TimeCoverageRelationStatistics Valid=145, Invalid=235, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:24:08,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19776 states. [2021-06-12 19:24:08,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19776 to 14764. [2021-06-12 19:24:08,653 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) [2021-06-12 19:24:08,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14764 states to 14764 states and 38355 transitions. [2021-06-12 19:24:08,687 INFO L78 Accepts]: Start accepts. Automaton has 14764 states and 38355 transitions. Word has length 59 [2021-06-12 19:24:08,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:24:08,687 INFO L482 AbstractCegarLoop]: Abstraction has 14764 states and 38355 transitions. [2021-06-12 19:24:08,687 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) [2021-06-12 19:24:08,687 INFO L276 IsEmpty]: Start isEmpty. Operand 14764 states and 38355 transitions. [2021-06-12 19:24:08,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-12 19:24:08,700 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:24:08,700 INFO L472 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:24:08,922 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 430 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable888 [2021-06-12 19:24:08,922 INFO L430 AbstractCegarLoop]: === Iteration 439 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:24:08,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:24:08,922 INFO L82 PathProgramCache]: Analyzing trace with hash 1369750312, now seen corresponding path program 258 times [2021-06-12 19:24:08,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:24:08,923 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559955212] [2021-06-12 19:24:08,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:24:08,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:24:09,025 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 68 proven. 110 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:24:09,025 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:24:09,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559955212] [2021-06-12 19:24:09,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559955212] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:09,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [64508291] [2021-06-12 19:24:09,026 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 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 [2021-06-12 19:24:09,065 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-06-12 19:24:09,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:24:09,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 19:24:09,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:24:09,167 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 68 proven. 110 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:24:09,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [64508291] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:09,167 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:24:09,167 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-06-12 19:24:09,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831955058] [2021-06-12 19:24:09,168 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:24:09,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:24:09,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:24:09,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:24:09,168 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) [2021-06-12 19:24:09,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:24:09,470 INFO L93 Difference]: Finished difference Result 16631 states and 41638 transitions. [2021-06-12 19:24:09,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:24:09,470 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 [2021-06-12 19:24:09,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:24:09,496 INFO L225 Difference]: With dead ends: 16631 [2021-06-12 19:24:09,496 INFO L226 Difference]: Without dead ends: 16604 [2021-06-12 19:24:09,496 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 125.2ms TimeCoverageRelationStatistics Valid=92, Invalid=214, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:24:09,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16604 states. [2021-06-12 19:24:09,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16604 to 14764. [2021-06-12 19:24:09,749 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) [2021-06-12 19:24:09,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14764 states to 14764 states and 38346 transitions. [2021-06-12 19:24:09,782 INFO L78 Accepts]: Start accepts. Automaton has 14764 states and 38346 transitions. Word has length 59 [2021-06-12 19:24:09,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:24:09,782 INFO L482 AbstractCegarLoop]: Abstraction has 14764 states and 38346 transitions. [2021-06-12 19:24:09,782 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) [2021-06-12 19:24:09,782 INFO L276 IsEmpty]: Start isEmpty. Operand 14764 states and 38346 transitions. [2021-06-12 19:24:09,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-12 19:24:09,795 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:24:09,795 INFO L472 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:24:10,017 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 431 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable889 [2021-06-12 19:24:10,017 INFO L430 AbstractCegarLoop]: === Iteration 440 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:24:10,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:24:10,018 INFO L82 PathProgramCache]: Analyzing trace with hash -1823442059, now seen corresponding path program 123 times [2021-06-12 19:24:10,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:24:10,018 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491951637] [2021-06-12 19:24:10,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:24:10,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:24:10,133 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 9 proven. 165 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:24:10,133 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:24:10,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491951637] [2021-06-12 19:24:10,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491951637] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:10,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479841835] [2021-06-12 19:24:10,133 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 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 [2021-06-12 19:24:10,179 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-06-12 19:24:10,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:24:10,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 19:24:10,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:24:10,287 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 8 proven. 166 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:24:10,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [479841835] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:10,287 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:24:10,287 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-12 19:24:10,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552138370] [2021-06-12 19:24:10,287 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 19:24:10,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:24:10,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 19:24:10,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:24:10,288 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) [2021-06-12 19:24:10,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:24:10,965 INFO L93 Difference]: Finished difference Result 16764 states and 42302 transitions. [2021-06-12 19:24:10,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 19:24:10,965 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 [2021-06-12 19:24:10,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:24:10,990 INFO L225 Difference]: With dead ends: 16764 [2021-06-12 19:24:10,991 INFO L226 Difference]: Without dead ends: 16726 [2021-06-12 19:24:10,991 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 187.3ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:24:11,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16726 states. [2021-06-12 19:24:11,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16726 to 14878. [2021-06-12 19:24:11,334 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) [2021-06-12 19:24:11,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14878 states to 14878 states and 38640 transitions. [2021-06-12 19:24:11,367 INFO L78 Accepts]: Start accepts. Automaton has 14878 states and 38640 transitions. Word has length 59 [2021-06-12 19:24:11,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:24:11,367 INFO L482 AbstractCegarLoop]: Abstraction has 14878 states and 38640 transitions. [2021-06-12 19:24:11,368 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) [2021-06-12 19:24:11,368 INFO L276 IsEmpty]: Start isEmpty. Operand 14878 states and 38640 transitions. [2021-06-12 19:24:11,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-12 19:24:11,381 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:24:11,381 INFO L472 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:24:11,603 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 432 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable894 [2021-06-12 19:24:11,604 INFO L430 AbstractCegarLoop]: === Iteration 441 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:24:11,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:24:11,604 INFO L82 PathProgramCache]: Analyzing trace with hash 917828380, now seen corresponding path program 259 times [2021-06-12 19:24:11,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:24:11,604 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782869391] [2021-06-12 19:24:11,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:24:11,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:24:11,679 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 62 proven. 112 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-12 19:24:11,680 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:24:11,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782869391] [2021-06-12 19:24:11,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782869391] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:11,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791909245] [2021-06-12 19:24:11,680 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 [2021-06-12 19:24:11,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:24:11,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 19:24:11,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:24:11,814 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 62 proven. 112 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-12 19:24:11,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1791909245] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:11,815 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:24:11,815 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-12 19:24:11,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871530524] [2021-06-12 19:24:11,815 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:24:11,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:24:11,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:24:11,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:24:11,815 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) [2021-06-12 19:24:12,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:24:12,016 INFO L93 Difference]: Finished difference Result 17271 states and 42891 transitions. [2021-06-12 19:24:12,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:24:12,017 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 [2021-06-12 19:24:12,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:24:12,041 INFO L225 Difference]: With dead ends: 17271 [2021-06-12 19:24:12,041 INFO L226 Difference]: Without dead ends: 17268 [2021-06-12 19:24:12,042 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 61.9ms TimeCoverageRelationStatistics Valid=55, Invalid=77, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:24:12,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17268 states. [2021-06-12 19:24:12,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17268 to 14858. [2021-06-12 19:24:12,297 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) [2021-06-12 19:24:12,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14858 states to 14858 states and 38563 transitions. [2021-06-12 19:24:12,328 INFO L78 Accepts]: Start accepts. Automaton has 14858 states and 38563 transitions. Word has length 59 [2021-06-12 19:24:12,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:24:12,328 INFO L482 AbstractCegarLoop]: Abstraction has 14858 states and 38563 transitions. [2021-06-12 19:24:12,328 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) [2021-06-12 19:24:12,329 INFO L276 IsEmpty]: Start isEmpty. Operand 14858 states and 38563 transitions. [2021-06-12 19:24:12,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-12 19:24:12,341 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:24:12,341 INFO L472 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:24:12,558 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 433 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable895 [2021-06-12 19:24:12,559 INFO L430 AbstractCegarLoop]: === Iteration 442 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:24:12,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:24:12,559 INFO L82 PathProgramCache]: Analyzing trace with hash 1124890946, now seen corresponding path program 260 times [2021-06-12 19:24:12,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:24:12,559 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054792969] [2021-06-12 19:24:12,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:24:12,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:24:12,638 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 57 proven. 117 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-12 19:24:12,638 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:24:12,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054792969] [2021-06-12 19:24:12,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054792969] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:12,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461617599] [2021-06-12 19:24:12,639 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 [2021-06-12 19:24:12,675 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:24:12,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:24:12,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 19:24:12,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:24:12,773 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 57 proven. 117 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-12 19:24:12,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1461617599] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:12,773 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:24:12,773 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-12 19:24:12,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355787348] [2021-06-12 19:24:12,774 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 19:24:12,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:24:12,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 19:24:12,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:24:12,774 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) [2021-06-12 19:24:13,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:24:13,033 INFO L93 Difference]: Finished difference Result 17287 states and 42863 transitions. [2021-06-12 19:24:13,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:24:13,033 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 [2021-06-12 19:24:13,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:24:13,056 INFO L225 Difference]: With dead ends: 17287 [2021-06-12 19:24:13,057 INFO L226 Difference]: Without dead ends: 17269 [2021-06-12 19:24:13,057 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 90.3ms TimeCoverageRelationStatistics Valid=77, Invalid=133, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:24:13,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17269 states. [2021-06-12 19:24:13,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17269 to 14858. [2021-06-12 19:24:13,299 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) [2021-06-12 19:24:13,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14858 states to 14858 states and 38539 transitions. [2021-06-12 19:24:13,330 INFO L78 Accepts]: Start accepts. Automaton has 14858 states and 38539 transitions. Word has length 59 [2021-06-12 19:24:13,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:24:13,330 INFO L482 AbstractCegarLoop]: Abstraction has 14858 states and 38539 transitions. [2021-06-12 19:24:13,330 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) [2021-06-12 19:24:13,330 INFO L276 IsEmpty]: Start isEmpty. Operand 14858 states and 38539 transitions. [2021-06-12 19:24:13,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-12 19:24:13,343 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:24:13,343 INFO L472 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:24:13,566 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable897,434 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:24:13,566 INFO L430 AbstractCegarLoop]: === Iteration 443 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:24:13,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:24:13,566 INFO L82 PathProgramCache]: Analyzing trace with hash -323109067, now seen corresponding path program 261 times [2021-06-12 19:24:13,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:24:13,566 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873850368] [2021-06-12 19:24:13,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:24:13,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:24:13,673 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 20 proven. 154 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:24:13,673 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:24:13,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873850368] [2021-06-12 19:24:13,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873850368] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:13,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454717148] [2021-06-12 19:24:13,673 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 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 [2021-06-12 19:24:13,715 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-06-12 19:24:13,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:24:13,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 19:24:13,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:24:13,832 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 15 proven. 159 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:24:13,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1454717148] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:13,832 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:24:13,832 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-12 19:24:13,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397130470] [2021-06-12 19:24:13,832 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 19:24:13,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:24:13,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 19:24:13,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:24:13,833 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) [2021-06-12 19:24:14,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:24:14,827 INFO L93 Difference]: Finished difference Result 15989 states and 40590 transitions. [2021-06-12 19:24:14,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 19:24:14,827 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 [2021-06-12 19:24:14,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:24:14,846 INFO L225 Difference]: With dead ends: 15989 [2021-06-12 19:24:14,846 INFO L226 Difference]: Without dead ends: 15915 [2021-06-12 19:24:14,847 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 183.7ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:24:14,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15915 states. [2021-06-12 19:24:15,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15915 to 14924. [2021-06-12 19:24:15,076 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) [2021-06-12 19:24:15,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14924 states to 14924 states and 38635 transitions. [2021-06-12 19:24:15,109 INFO L78 Accepts]: Start accepts. Automaton has 14924 states and 38635 transitions. Word has length 59 [2021-06-12 19:24:15,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:24:15,109 INFO L482 AbstractCegarLoop]: Abstraction has 14924 states and 38635 transitions. [2021-06-12 19:24:15,109 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) [2021-06-12 19:24:15,109 INFO L276 IsEmpty]: Start isEmpty. Operand 14924 states and 38635 transitions. [2021-06-12 19:24:15,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-12 19:24:15,122 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:24:15,122 INFO L472 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:24:15,343 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable900,435 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:24:15,344 INFO L430 AbstractCegarLoop]: === Iteration 444 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:24:15,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:24:15,344 INFO L82 PathProgramCache]: Analyzing trace with hash -936645247, now seen corresponding path program 262 times [2021-06-12 19:24:15,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:24:15,344 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894137348] [2021-06-12 19:24:15,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:24:15,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:24:15,529 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 155 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-12 19:24:15,529 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:24:15,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894137348] [2021-06-12 19:24:15,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894137348] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:15,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153085661] [2021-06-12 19:24:15,530 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 [2021-06-12 19:24:15,603 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:24:15,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:24:15,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 19:24:15,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:24:15,760 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 156 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-12 19:24:15,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1153085661] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:15,760 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:24:15,760 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-12 19:24:15,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729802948] [2021-06-12 19:24:15,760 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 19:24:15,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:24:15,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 19:24:15,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:24:15,761 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) [2021-06-12 19:24:16,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:24:16,480 INFO L93 Difference]: Finished difference Result 16650 states and 42030 transitions. [2021-06-12 19:24:16,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 19:24:16,480 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 [2021-06-12 19:24:16,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:24:16,502 INFO L225 Difference]: With dead ends: 16650 [2021-06-12 19:24:16,502 INFO L226 Difference]: Without dead ends: 16638 [2021-06-12 19:24:16,502 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 248.0ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:24:16,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16638 states. [2021-06-12 19:24:16,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16638 to 14998. [2021-06-12 19:24:16,684 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) [2021-06-12 19:24:16,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14998 states to 14998 states and 38809 transitions. [2021-06-12 19:24:16,706 INFO L78 Accepts]: Start accepts. Automaton has 14998 states and 38809 transitions. Word has length 59 [2021-06-12 19:24:16,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:24:16,707 INFO L482 AbstractCegarLoop]: Abstraction has 14998 states and 38809 transitions. [2021-06-12 19:24:16,707 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) [2021-06-12 19:24:16,707 INFO L276 IsEmpty]: Start isEmpty. Operand 14998 states and 38809 transitions. [2021-06-12 19:24:16,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-12 19:24:16,716 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:24:16,716 INFO L472 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:24:16,916 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable901,436 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:24:16,917 INFO L430 AbstractCegarLoop]: === Iteration 445 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:24:16,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:24:16,917 INFO L82 PathProgramCache]: Analyzing trace with hash 1205272087, now seen corresponding path program 263 times [2021-06-12 19:24:16,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:24:16,917 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284393162] [2021-06-12 19:24:16,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:24:16,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:24:17,010 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 157 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:24:17,011 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:24:17,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284393162] [2021-06-12 19:24:17,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284393162] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:17,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822621047] [2021-06-12 19:24:17,011 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 [2021-06-12 19:24:17,044 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-06-12 19:24:17,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:24:17,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 19:24:17,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:24:17,132 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 158 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:24:17,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [822621047] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:17,133 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:24:17,133 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-12 19:24:17,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179878877] [2021-06-12 19:24:17,133 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:24:17,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:24:17,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:24:17,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:24:17,133 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) [2021-06-12 19:24:17,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:24:17,840 INFO L93 Difference]: Finished difference Result 18719 states and 46626 transitions. [2021-06-12 19:24:17,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 19:24:17,840 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 [2021-06-12 19:24:17,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:24:17,859 INFO L225 Difference]: With dead ends: 18719 [2021-06-12 19:24:17,860 INFO L226 Difference]: Without dead ends: 18665 [2021-06-12 19:24:17,860 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 217.9ms TimeCoverageRelationStatistics Valid=93, Invalid=609, Unknown=0, NotChecked=0, Total=702 [2021-06-12 19:24:17,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18665 states. [2021-06-12 19:24:18,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18665 to 15200. [2021-06-12 19:24:18,090 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) [2021-06-12 19:24:18,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15200 states to 15200 states and 39347 transitions. [2021-06-12 19:24:18,115 INFO L78 Accepts]: Start accepts. Automaton has 15200 states and 39347 transitions. Word has length 59 [2021-06-12 19:24:18,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:24:18,115 INFO L482 AbstractCegarLoop]: Abstraction has 15200 states and 39347 transitions. [2021-06-12 19:24:18,115 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) [2021-06-12 19:24:18,115 INFO L276 IsEmpty]: Start isEmpty. Operand 15200 states and 39347 transitions. [2021-06-12 19:24:18,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-12 19:24:18,125 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:24:18,125 INFO L472 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:24:18,325 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable902,437 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:24:18,325 INFO L430 AbstractCegarLoop]: === Iteration 446 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:24:18,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:24:18,326 INFO L82 PathProgramCache]: Analyzing trace with hash -1557136100, now seen corresponding path program 264 times [2021-06-12 19:24:18,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:24:18,326 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115494565] [2021-06-12 19:24:18,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:24:18,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:24:18,435 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 52 proven. 125 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:24:18,435 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:24:18,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115494565] [2021-06-12 19:24:18,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115494565] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:18,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843106153] [2021-06-12 19:24:18,436 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 [2021-06-12 19:24:18,473 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-06-12 19:24:18,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:24:18,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 19:24:18,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:24:18,573 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 52 proven. 125 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:24:18,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1843106153] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:18,574 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:24:18,574 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-06-12 19:24:18,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654649780] [2021-06-12 19:24:18,574 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:24:18,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:24:18,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:24:18,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:24:18,574 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) [2021-06-12 19:24:18,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:24:18,804 INFO L93 Difference]: Finished difference Result 17641 states and 43655 transitions. [2021-06-12 19:24:18,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:24:18,804 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 [2021-06-12 19:24:18,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:24:18,823 INFO L225 Difference]: With dead ends: 17641 [2021-06-12 19:24:18,824 INFO L226 Difference]: Without dead ends: 17617 [2021-06-12 19:24:18,824 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 117.3ms TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:24:18,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17617 states. [2021-06-12 19:24:18,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17617 to 15200. [2021-06-12 19:24:19,012 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) [2021-06-12 19:24:19,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15200 states to 15200 states and 39330 transitions. [2021-06-12 19:24:19,036 INFO L78 Accepts]: Start accepts. Automaton has 15200 states and 39330 transitions. Word has length 59 [2021-06-12 19:24:19,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:24:19,036 INFO L482 AbstractCegarLoop]: Abstraction has 15200 states and 39330 transitions. [2021-06-12 19:24:19,037 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) [2021-06-12 19:24:19,037 INFO L276 IsEmpty]: Start isEmpty. Operand 15200 states and 39330 transitions. [2021-06-12 19:24:19,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-12 19:24:19,046 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:24:19,046 INFO L472 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:24:19,246 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 438 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable903 [2021-06-12 19:24:19,247 INFO L430 AbstractCegarLoop]: === Iteration 447 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:24:19,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:24:19,247 INFO L82 PathProgramCache]: Analyzing trace with hash 1360108621, now seen corresponding path program 265 times [2021-06-12 19:24:19,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:24:19,247 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288516313] [2021-06-12 19:24:19,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:24:19,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:24:19,351 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 157 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:24:19,352 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:24:19,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288516313] [2021-06-12 19:24:19,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288516313] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:19,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204314864] [2021-06-12 19:24:19,352 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 [2021-06-12 19:24:19,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:24:19,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 19:24:19,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:24:19,494 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 158 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:24:19,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [204314864] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:19,494 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:24:19,494 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-12 19:24:19,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941720346] [2021-06-12 19:24:19,494 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:24:19,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:24:19,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:24:19,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:24:19,495 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) [2021-06-12 19:24:20,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:24:20,394 INFO L93 Difference]: Finished difference Result 21862 states and 53696 transitions. [2021-06-12 19:24:20,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-12 19:24:20,395 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 [2021-06-12 19:24:20,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:24:20,421 INFO L225 Difference]: With dead ends: 21862 [2021-06-12 19:24:20,421 INFO L226 Difference]: Without dead ends: 21748 [2021-06-12 19:24:20,421 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 352.1ms TimeCoverageRelationStatistics Valid=183, Invalid=1299, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 19:24:20,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21748 states. [2021-06-12 19:24:20,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21748 to 15415. [2021-06-12 19:24:20,649 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) [2021-06-12 19:24:20,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15415 states to 15415 states and 39909 transitions. [2021-06-12 19:24:20,674 INFO L78 Accepts]: Start accepts. Automaton has 15415 states and 39909 transitions. Word has length 59 [2021-06-12 19:24:20,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:24:20,674 INFO L482 AbstractCegarLoop]: Abstraction has 15415 states and 39909 transitions. [2021-06-12 19:24:20,674 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) [2021-06-12 19:24:20,674 INFO L276 IsEmpty]: Start isEmpty. Operand 15415 states and 39909 transitions. [2021-06-12 19:24:20,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-12 19:24:20,684 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:24:20,684 INFO L472 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:24:20,884 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable907,439 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:24:20,884 INFO L430 AbstractCegarLoop]: === Iteration 448 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:24:20,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:24:20,885 INFO L82 PathProgramCache]: Analyzing trace with hash 1746711298, now seen corresponding path program 266 times [2021-06-12 19:24:20,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:24:20,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097487629] [2021-06-12 19:24:20,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:24:20,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:24:21,044 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 53 proven. 124 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:24:21,044 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:24:21,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097487629] [2021-06-12 19:24:21,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097487629] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:21,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182139698] [2021-06-12 19:24:21,044 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 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 [2021-06-12 19:24:21,072 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:24:21,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:24:21,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 19:24:21,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:24:21,159 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 53 proven. 124 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:24:21,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1182139698] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:21,159 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:24:21,159 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-06-12 19:24:21,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208271091] [2021-06-12 19:24:21,160 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:24:21,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:24:21,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:24:21,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:24:21,160 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) [2021-06-12 19:24:21,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:24:21,391 INFO L93 Difference]: Finished difference Result 17893 states and 44283 transitions. [2021-06-12 19:24:21,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:24:21,392 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 [2021-06-12 19:24:21,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:24:21,411 INFO L225 Difference]: With dead ends: 17893 [2021-06-12 19:24:21,411 INFO L226 Difference]: Without dead ends: 17860 [2021-06-12 19:24:21,412 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 104.6ms TimeCoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:24:21,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17860 states. [2021-06-12 19:24:21,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17860 to 15072. [2021-06-12 19:24:21,604 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) [2021-06-12 19:24:21,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15072 states to 15072 states and 38939 transitions. [2021-06-12 19:24:21,631 INFO L78 Accepts]: Start accepts. Automaton has 15072 states and 38939 transitions. Word has length 59 [2021-06-12 19:24:21,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:24:21,631 INFO L482 AbstractCegarLoop]: Abstraction has 15072 states and 38939 transitions. [2021-06-12 19:24:21,631 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) [2021-06-12 19:24:21,631 INFO L276 IsEmpty]: Start isEmpty. Operand 15072 states and 38939 transitions. [2021-06-12 19:24:21,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-12 19:24:21,642 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:24:21,642 INFO L472 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:24:21,842 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable908,440 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:24:21,843 INFO L430 AbstractCegarLoop]: === Iteration 449 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:24:21,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:24:21,843 INFO L82 PathProgramCache]: Analyzing trace with hash 1300417111, now seen corresponding path program 267 times [2021-06-12 19:24:21,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:24:21,843 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916360766] [2021-06-12 19:24:21,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:24:21,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:24:21,956 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 160 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:24:21,956 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:24:21,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916360766] [2021-06-12 19:24:21,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916360766] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:21,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319268469] [2021-06-12 19:24:21,956 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 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 [2021-06-12 19:24:21,989 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-06-12 19:24:21,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:24:21,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 19:24:21,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:24:22,076 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 160 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:24:22,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [319268469] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:22,077 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:24:22,077 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-12 19:24:22,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123549430] [2021-06-12 19:24:22,077 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:24:22,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:24:22,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:24:22,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:24:22,077 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) [2021-06-12 19:24:22,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:24:22,842 INFO L93 Difference]: Finished difference Result 20407 states and 50176 transitions. [2021-06-12 19:24:22,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 19:24:22,842 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 [2021-06-12 19:24:22,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:24:22,862 INFO L225 Difference]: With dead ends: 20407 [2021-06-12 19:24:22,863 INFO L226 Difference]: Without dead ends: 20251 [2021-06-12 19:24:22,863 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 61 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 257.6ms TimeCoverageRelationStatistics Valid=113, Invalid=699, Unknown=0, NotChecked=0, Total=812 [2021-06-12 19:24:22,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20251 states. [2021-06-12 19:24:23,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20251 to 14617. [2021-06-12 19:24:23,053 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) [2021-06-12 19:24:23,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14617 states to 14617 states and 37658 transitions. [2021-06-12 19:24:23,076 INFO L78 Accepts]: Start accepts. Automaton has 14617 states and 37658 transitions. Word has length 59 [2021-06-12 19:24:23,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:24:23,076 INFO L482 AbstractCegarLoop]: Abstraction has 14617 states and 37658 transitions. [2021-06-12 19:24:23,076 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) [2021-06-12 19:24:23,076 INFO L276 IsEmpty]: Start isEmpty. Operand 14617 states and 37658 transitions. [2021-06-12 19:24:23,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-12 19:24:23,086 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:24:23,086 INFO L472 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:24:23,286 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 441 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable913 [2021-06-12 19:24:23,286 INFO L430 AbstractCegarLoop]: === Iteration 450 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:24:23,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:24:23,287 INFO L82 PathProgramCache]: Analyzing trace with hash 1062355594, now seen corresponding path program 124 times [2021-06-12 19:24:23,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:24:23,287 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910348199] [2021-06-12 19:24:23,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:24:23,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:24:23,351 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 134 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:24:23,351 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:24:23,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910348199] [2021-06-12 19:24:23,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910348199] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:23,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1590558028] [2021-06-12 19:24:23,351 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 [2021-06-12 19:24:23,378 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:24:23,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:24:23,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 19:24:23,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:24:23,466 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 135 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:24:23,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1590558028] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:23,466 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:24:23,466 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 12 [2021-06-12 19:24:23,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017360167] [2021-06-12 19:24:23,466 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:24:23,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:24:23,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:24:23,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=92, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:24:23,466 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) [2021-06-12 19:24:23,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:24:23,687 INFO L93 Difference]: Finished difference Result 18811 states and 46226 transitions. [2021-06-12 19:24:23,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:24:23,688 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 [2021-06-12 19:24:23,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:24:23,708 INFO L225 Difference]: With dead ends: 18811 [2021-06-12 19:24:23,708 INFO L226 Difference]: Without dead ends: 18797 [2021-06-12 19:24:23,709 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 71.6ms TimeCoverageRelationStatistics Valid=86, Invalid=124, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:24:23,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18797 states. [2021-06-12 19:24:23,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18797 to 14958. [2021-06-12 19:24:23,944 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) [2021-06-12 19:24:23,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14958 states to 14958 states and 38612 transitions. [2021-06-12 19:24:23,969 INFO L78 Accepts]: Start accepts. Automaton has 14958 states and 38612 transitions. Word has length 59 [2021-06-12 19:24:23,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:24:23,970 INFO L482 AbstractCegarLoop]: Abstraction has 14958 states and 38612 transitions. [2021-06-12 19:24:23,970 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) [2021-06-12 19:24:23,970 INFO L276 IsEmpty]: Start isEmpty. Operand 14958 states and 38612 transitions. [2021-06-12 19:24:23,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-12 19:24:23,979 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:24:23,979 INFO L472 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:24:24,180 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable914,442 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:24:24,180 INFO L430 AbstractCegarLoop]: === Iteration 451 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:24:24,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:24:24,180 INFO L82 PathProgramCache]: Analyzing trace with hash 440475184, now seen corresponding path program 125 times [2021-06-12 19:24:24,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:24:24,180 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556829656] [2021-06-12 19:24:24,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:24:24,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:24:24,246 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 134 proven. 43 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:24:24,246 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:24:24,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556829656] [2021-06-12 19:24:24,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556829656] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:24,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278663247] [2021-06-12 19:24:24,246 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 [2021-06-12 19:24:24,279 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-06-12 19:24:24,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:24:24,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 19:24:24,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:24:24,384 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 135 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:24:24,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [278663247] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:24,384 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:24:24,384 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 14 [2021-06-12 19:24:24,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559133105] [2021-06-12 19:24:24,384 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:24:24,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:24:24,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:24:24,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:24:24,385 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) [2021-06-12 19:24:24,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:24:24,643 INFO L93 Difference]: Finished difference Result 23655 states and 57376 transitions. [2021-06-12 19:24:24,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 19:24:24,643 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 [2021-06-12 19:24:24,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:24:24,670 INFO L225 Difference]: With dead ends: 23655 [2021-06-12 19:24:24,670 INFO L226 Difference]: Without dead ends: 23655 [2021-06-12 19:24:24,670 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 105.4ms TimeCoverageRelationStatistics Valid=144, Invalid=198, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:24:24,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23655 states. [2021-06-12 19:24:24,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23655 to 14973. [2021-06-12 19:24:24,899 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) [2021-06-12 19:24:24,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14973 states to 14973 states and 38657 transitions. [2021-06-12 19:24:24,922 INFO L78 Accepts]: Start accepts. Automaton has 14973 states and 38657 transitions. Word has length 59 [2021-06-12 19:24:24,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:24:24,923 INFO L482 AbstractCegarLoop]: Abstraction has 14973 states and 38657 transitions. [2021-06-12 19:24:24,923 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) [2021-06-12 19:24:24,923 INFO L276 IsEmpty]: Start isEmpty. Operand 14973 states and 38657 transitions. [2021-06-12 19:24:24,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-12 19:24:24,932 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:24:24,932 INFO L472 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:24:25,133 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable916,443 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:24:25,133 INFO L430 AbstractCegarLoop]: === Iteration 452 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:24:25,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:24:25,133 INFO L82 PathProgramCache]: Analyzing trace with hash -1197097272, now seen corresponding path program 126 times [2021-06-12 19:24:25,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:24:25,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129099003] [2021-06-12 19:24:25,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:24:25,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:24:25,210 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 131 proven. 46 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:24:25,210 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:24:25,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129099003] [2021-06-12 19:24:25,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129099003] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:25,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69832297] [2021-06-12 19:24:25,210 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 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 [2021-06-12 19:24:25,242 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-06-12 19:24:25,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:24:25,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 19:24:25,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:24:25,344 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 132 proven. 46 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:24:25,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [69832297] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:25,344 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:24:25,344 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 13 [2021-06-12 19:24:25,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644412331] [2021-06-12 19:24:25,344 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:24:25,344 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:24:25,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:24:25,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:24:25,345 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) [2021-06-12 19:24:25,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:24:25,677 INFO L93 Difference]: Finished difference Result 24867 states and 60280 transitions. [2021-06-12 19:24:25,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 19:24:25,677 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 [2021-06-12 19:24:25,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:24:25,704 INFO L225 Difference]: With dead ends: 24867 [2021-06-12 19:24:25,704 INFO L226 Difference]: Without dead ends: 24867 [2021-06-12 19:24:25,705 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 128.6ms TimeCoverageRelationStatistics Valid=170, Invalid=250, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:24:25,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24867 states. [2021-06-12 19:24:25,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24867 to 15014. [2021-06-12 19:24:25,930 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) [2021-06-12 19:24:25,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15014 states to 15014 states and 38785 transitions. [2021-06-12 19:24:25,954 INFO L78 Accepts]: Start accepts. Automaton has 15014 states and 38785 transitions. Word has length 59 [2021-06-12 19:24:25,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:24:25,954 INFO L482 AbstractCegarLoop]: Abstraction has 15014 states and 38785 transitions. [2021-06-12 19:24:25,955 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) [2021-06-12 19:24:25,955 INFO L276 IsEmpty]: Start isEmpty. Operand 15014 states and 38785 transitions. [2021-06-12 19:24:25,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-12 19:24:25,965 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:24:25,965 INFO L472 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:24:26,165 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable917,444 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:24:26,165 INFO L430 AbstractCegarLoop]: === Iteration 453 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:24:26,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:24:26,165 INFO L82 PathProgramCache]: Analyzing trace with hash 1407874860, now seen corresponding path program 127 times [2021-06-12 19:24:26,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:24:26,165 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349698840] [2021-06-12 19:24:26,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:24:26,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:24:26,334 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 118 proven. 59 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:24:26,334 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:24:26,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349698840] [2021-06-12 19:24:26,334 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349698840] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:26,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202027487] [2021-06-12 19:24:26,334 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 [2021-06-12 19:24:26,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:24:26,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 19:24:26,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:24:26,455 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 119 proven. 59 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:24:26,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1202027487] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:26,456 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:24:26,456 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 14 [2021-06-12 19:24:26,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108071944] [2021-06-12 19:24:26,456 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:24:26,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:24:26,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:24:26,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:24:26,456 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) [2021-06-12 19:24:26,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:24:26,796 INFO L93 Difference]: Finished difference Result 23075 states and 56081 transitions. [2021-06-12 19:24:26,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 19:24:26,796 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 [2021-06-12 19:24:26,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:24:26,824 INFO L225 Difference]: With dead ends: 23075 [2021-06-12 19:24:26,824 INFO L226 Difference]: Without dead ends: 23075 [2021-06-12 19:24:26,824 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 227.6ms TimeCoverageRelationStatistics Valid=198, Invalid=308, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:24:26,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23075 states. [2021-06-12 19:24:27,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23075 to 15042. [2021-06-12 19:24:27,052 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) [2021-06-12 19:24:27,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15042 states to 15042 states and 38865 transitions. [2021-06-12 19:24:27,075 INFO L78 Accepts]: Start accepts. Automaton has 15042 states and 38865 transitions. Word has length 59 [2021-06-12 19:24:27,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:24:27,075 INFO L482 AbstractCegarLoop]: Abstraction has 15042 states and 38865 transitions. [2021-06-12 19:24:27,075 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) [2021-06-12 19:24:27,075 INFO L276 IsEmpty]: Start isEmpty. Operand 15042 states and 38865 transitions. [2021-06-12 19:24:27,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-12 19:24:27,085 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:24:27,085 INFO L472 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:24:27,285 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 445 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable918 [2021-06-12 19:24:27,285 INFO L430 AbstractCegarLoop]: === Iteration 454 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:24:27,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:24:27,286 INFO L82 PathProgramCache]: Analyzing trace with hash 368587848, now seen corresponding path program 128 times [2021-06-12 19:24:27,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:24:27,286 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699640387] [2021-06-12 19:24:27,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:24:27,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:24:27,389 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 105 proven. 73 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:24:27,389 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:24:27,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699640387] [2021-06-12 19:24:27,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699640387] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:27,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313241315] [2021-06-12 19:24:27,389 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 [2021-06-12 19:24:27,417 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:24:27,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:24:27,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 19:24:27,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:24:27,517 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 106 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:24:27,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [313241315] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:27,518 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:24:27,518 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 15 [2021-06-12 19:24:27,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941809030] [2021-06-12 19:24:27,518 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:24:27,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:24:27,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:24:27,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:24:27,518 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) [2021-06-12 19:24:27,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:24:27,856 INFO L93 Difference]: Finished difference Result 19432 states and 47841 transitions. [2021-06-12 19:24:27,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 19:24:27,857 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 [2021-06-12 19:24:27,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:24:27,879 INFO L225 Difference]: With dead ends: 19432 [2021-06-12 19:24:27,879 INFO L226 Difference]: Without dead ends: 19432 [2021-06-12 19:24:27,879 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 159.5ms TimeCoverageRelationStatistics Valid=188, Invalid=318, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:24:27,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19432 states. [2021-06-12 19:24:28,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19432 to 14656. [2021-06-12 19:24:28,075 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) [2021-06-12 19:24:28,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14656 states to 14656 states and 37760 transitions. [2021-06-12 19:24:28,099 INFO L78 Accepts]: Start accepts. Automaton has 14656 states and 37760 transitions. Word has length 59 [2021-06-12 19:24:28,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:24:28,099 INFO L482 AbstractCegarLoop]: Abstraction has 14656 states and 37760 transitions. [2021-06-12 19:24:28,099 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) [2021-06-12 19:24:28,099 INFO L276 IsEmpty]: Start isEmpty. Operand 14656 states and 37760 transitions. [2021-06-12 19:24:28,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-12 19:24:28,109 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:24:28,109 INFO L472 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:24:28,309 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 446 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable919 [2021-06-12 19:24:28,309 INFO L430 AbstractCegarLoop]: === Iteration 455 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:24:28,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:24:28,309 INFO L82 PathProgramCache]: Analyzing trace with hash -1100977316, now seen corresponding path program 268 times [2021-06-12 19:24:28,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:24:28,310 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136739757] [2021-06-12 19:24:28,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:24:28,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:24:28,426 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 61 proven. 117 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:24:28,426 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:24:28,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136739757] [2021-06-12 19:24:28,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136739757] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:28,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63048949] [2021-06-12 19:24:28,426 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-12 19:24:28,454 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:24:28,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:24:28,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 19:24:28,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:24:28,542 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 61 proven. 117 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:24:28,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [63048949] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:28,543 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:24:28,543 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-06-12 19:24:28,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360304427] [2021-06-12 19:24:28,543 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:24:28,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:24:28,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:24:28,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:24:28,543 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) [2021-06-12 19:24:28,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:24:28,870 INFO L93 Difference]: Finished difference Result 16822 states and 41592 transitions. [2021-06-12 19:24:28,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:24:28,870 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 [2021-06-12 19:24:28,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:24:28,890 INFO L225 Difference]: With dead ends: 16822 [2021-06-12 19:24:28,890 INFO L226 Difference]: Without dead ends: 16786 [2021-06-12 19:24:28,890 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 132.9ms TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:24:28,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16786 states. [2021-06-12 19:24:29,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16786 to 14656. [2021-06-12 19:24:29,117 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) [2021-06-12 19:24:29,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14656 states to 14656 states and 37748 transitions. [2021-06-12 19:24:29,141 INFO L78 Accepts]: Start accepts. Automaton has 14656 states and 37748 transitions. Word has length 59 [2021-06-12 19:24:29,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:24:29,141 INFO L482 AbstractCegarLoop]: Abstraction has 14656 states and 37748 transitions. [2021-06-12 19:24:29,141 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) [2021-06-12 19:24:29,141 INFO L276 IsEmpty]: Start isEmpty. Operand 14656 states and 37748 transitions. [2021-06-12 19:24:29,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-12 19:24:29,151 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:24:29,151 INFO L472 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:24:29,351 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 447 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable920 [2021-06-12 19:24:29,351 INFO L430 AbstractCegarLoop]: === Iteration 456 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:24:29,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:24:29,352 INFO L82 PathProgramCache]: Analyzing trace with hash 1176780123, now seen corresponding path program 129 times [2021-06-12 19:24:29,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:24:29,352 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202882784] [2021-06-12 19:24:29,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:24:29,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:24:29,444 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 9 proven. 165 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:24:29,445 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:24:29,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202882784] [2021-06-12 19:24:29,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202882784] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:29,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013317716] [2021-06-12 19:24:29,445 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 [2021-06-12 19:24:29,479 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-06-12 19:24:29,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:24:29,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 19:24:29,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:24:29,565 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 8 proven. 166 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:24:29,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1013317716] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:29,566 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:24:29,566 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-12 19:24:29,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353189480] [2021-06-12 19:24:29,566 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 19:24:29,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:24:29,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 19:24:29,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:24:29,566 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) [2021-06-12 19:24:30,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:24:30,096 INFO L93 Difference]: Finished difference Result 16512 states and 41427 transitions. [2021-06-12 19:24:30,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 19:24:30,096 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 [2021-06-12 19:24:30,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:24:30,113 INFO L225 Difference]: With dead ends: 16512 [2021-06-12 19:24:30,113 INFO L226 Difference]: Without dead ends: 16481 [2021-06-12 19:24:30,113 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 148.4ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:24:30,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16481 states. [2021-06-12 19:24:30,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16481 to 14732. [2021-06-12 19:24:30,288 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) [2021-06-12 19:24:30,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14732 states to 14732 states and 37942 transitions. [2021-06-12 19:24:30,312 INFO L78 Accepts]: Start accepts. Automaton has 14732 states and 37942 transitions. Word has length 59 [2021-06-12 19:24:30,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:24:30,312 INFO L482 AbstractCegarLoop]: Abstraction has 14732 states and 37942 transitions. [2021-06-12 19:24:30,312 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) [2021-06-12 19:24:30,312 INFO L276 IsEmpty]: Start isEmpty. Operand 14732 states and 37942 transitions. [2021-06-12 19:24:30,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-12 19:24:30,322 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:24:30,322 INFO L472 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:24:30,523 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable926,448 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:24:30,523 INFO L430 AbstractCegarLoop]: === Iteration 457 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:24:30,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:24:30,523 INFO L82 PathProgramCache]: Analyzing trace with hash -1617854181, now seen corresponding path program 269 times [2021-06-12 19:24:30,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:24:30,523 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675162884] [2021-06-12 19:24:30,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:24:30,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:24:30,610 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 20 proven. 154 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:24:30,610 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:24:30,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675162884] [2021-06-12 19:24:30,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675162884] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:30,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863200974] [2021-06-12 19:24:30,611 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 [2021-06-12 19:24:30,649 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2021-06-12 19:24:30,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:24:30,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 19:24:30,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:24:30,747 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 15 proven. 159 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:24:30,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [863200974] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:30,747 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:24:30,747 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-12 19:24:30,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107849881] [2021-06-12 19:24:30,747 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 19:24:30,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:24:30,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 19:24:30,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:24:30,748 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) [2021-06-12 19:24:31,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:24:31,442 INFO L93 Difference]: Finished difference Result 15859 states and 40013 transitions. [2021-06-12 19:24:31,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 19:24:31,442 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 [2021-06-12 19:24:31,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:24:31,458 INFO L225 Difference]: With dead ends: 15859 [2021-06-12 19:24:31,459 INFO L226 Difference]: Without dead ends: 15767 [2021-06-12 19:24:31,459 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 147.4ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:24:31,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15767 states. [2021-06-12 19:24:31,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15767 to 14855. [2021-06-12 19:24:31,626 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) [2021-06-12 19:24:31,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14855 states to 14855 states and 38165 transitions. [2021-06-12 19:24:31,650 INFO L78 Accepts]: Start accepts. Automaton has 14855 states and 38165 transitions. Word has length 59 [2021-06-12 19:24:31,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:24:31,650 INFO L482 AbstractCegarLoop]: Abstraction has 14855 states and 38165 transitions. [2021-06-12 19:24:31,650 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) [2021-06-12 19:24:31,650 INFO L276 IsEmpty]: Start isEmpty. Operand 14855 states and 38165 transitions. [2021-06-12 19:24:31,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-12 19:24:31,660 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:24:31,660 INFO L472 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:24:31,860 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable927,449 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:24:31,860 INFO L430 AbstractCegarLoop]: === Iteration 458 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:24:31,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:24:31,860 INFO L82 PathProgramCache]: Analyzing trace with hash 2063576935, now seen corresponding path program 270 times [2021-06-12 19:24:31,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:24:31,860 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146818375] [2021-06-12 19:24:31,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:24:31,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:24:32,057 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 155 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-12 19:24:32,057 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:24:32,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146818375] [2021-06-12 19:24:32,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146818375] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:32,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486655073] [2021-06-12 19:24:32,057 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 [2021-06-12 19:24:32,090 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-06-12 19:24:32,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:24:32,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 19:24:32,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:24:32,175 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 156 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-12 19:24:32,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [486655073] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:32,175 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:24:32,175 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-12 19:24:32,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083970465] [2021-06-12 19:24:32,175 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 19:24:32,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:24:32,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 19:24:32,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:24:32,175 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) [2021-06-12 19:24:32,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:24:32,751 INFO L93 Difference]: Finished difference Result 16568 states and 41541 transitions. [2021-06-12 19:24:32,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 19:24:32,751 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 [2021-06-12 19:24:32,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:24:32,771 INFO L225 Difference]: With dead ends: 16568 [2021-06-12 19:24:32,771 INFO L226 Difference]: Without dead ends: 16556 [2021-06-12 19:24:32,772 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 246.2ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:24:32,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16556 states. [2021-06-12 19:24:32,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16556 to 14951. [2021-06-12 19:24:32,964 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) [2021-06-12 19:24:32,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14951 states to 14951 states and 38400 transitions. [2021-06-12 19:24:32,987 INFO L78 Accepts]: Start accepts. Automaton has 14951 states and 38400 transitions. Word has length 59 [2021-06-12 19:24:32,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:24:32,987 INFO L482 AbstractCegarLoop]: Abstraction has 14951 states and 38400 transitions. [2021-06-12 19:24:32,987 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) [2021-06-12 19:24:32,987 INFO L276 IsEmpty]: Start isEmpty. Operand 14951 states and 38400 transitions. [2021-06-12 19:24:32,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-12 19:24:32,996 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:24:32,996 INFO L472 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:24:33,196 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable928,450 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:24:33,196 INFO L430 AbstractCegarLoop]: === Iteration 459 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:24:33,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:24:33,197 INFO L82 PathProgramCache]: Analyzing trace with hash 415219432, now seen corresponding path program 271 times [2021-06-12 19:24:33,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:24:33,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498052493] [2021-06-12 19:24:33,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:24:33,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:24:33,262 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 50 proven. 126 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:24:33,262 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:24:33,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498052493] [2021-06-12 19:24:33,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498052493] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:33,262 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934457292] [2021-06-12 19:24:33,262 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 [2021-06-12 19:24:33,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:24:33,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 19:24:33,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:24:33,393 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 50 proven. 126 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:24:33,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [934457292] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:33,394 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:24:33,394 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-12 19:24:33,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463829210] [2021-06-12 19:24:33,394 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 19:24:33,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:24:33,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 19:24:33,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:24:33,394 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) [2021-06-12 19:24:33,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:24:33,615 INFO L93 Difference]: Finished difference Result 17530 states and 42981 transitions. [2021-06-12 19:24:33,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:24:33,615 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 [2021-06-12 19:24:33,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:24:33,633 INFO L225 Difference]: With dead ends: 17530 [2021-06-12 19:24:33,633 INFO L226 Difference]: Without dead ends: 17512 [2021-06-12 19:24:33,633 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 76.4ms TimeCoverageRelationStatistics Valid=80, Invalid=130, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:24:33,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17512 states. [2021-06-12 19:24:33,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17512 to 14926. [2021-06-12 19:24:33,797 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) [2021-06-12 19:24:33,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14926 states to 14926 states and 38301 transitions. [2021-06-12 19:24:33,820 INFO L78 Accepts]: Start accepts. Automaton has 14926 states and 38301 transitions. Word has length 59 [2021-06-12 19:24:33,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:24:33,821 INFO L482 AbstractCegarLoop]: Abstraction has 14926 states and 38301 transitions. [2021-06-12 19:24:33,821 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) [2021-06-12 19:24:33,821 INFO L276 IsEmpty]: Start isEmpty. Operand 14926 states and 38301 transitions. [2021-06-12 19:24:33,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-12 19:24:33,830 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:24:33,830 INFO L472 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:24:34,031 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable929,451 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:24:34,031 INFO L430 AbstractCegarLoop]: === Iteration 460 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:24:34,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:24:34,031 INFO L82 PathProgramCache]: Analyzing trace with hash -89473027, now seen corresponding path program 272 times [2021-06-12 19:24:34,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:24:34,031 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379839012] [2021-06-12 19:24:34,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:24:34,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:24:34,125 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 157 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:24:34,125 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:24:34,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379839012] [2021-06-12 19:24:34,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379839012] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:34,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756669802] [2021-06-12 19:24:34,125 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-12 19:24:34,153 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:24:34,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:24:34,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 19:24:34,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:24:34,240 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 158 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:24:34,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756669802] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:34,240 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:24:34,240 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-12 19:24:34,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314715192] [2021-06-12 19:24:34,240 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:24:34,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:24:34,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:24:34,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:24:34,241 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) [2021-06-12 19:24:35,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:24:35,042 INFO L93 Difference]: Finished difference Result 18642 states and 46055 transitions. [2021-06-12 19:24:35,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-12 19:24:35,043 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 [2021-06-12 19:24:35,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:24:35,059 INFO L225 Difference]: With dead ends: 18642 [2021-06-12 19:24:35,059 INFO L226 Difference]: Without dead ends: 18588 [2021-06-12 19:24:35,059 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 236.8ms TimeCoverageRelationStatistics Valid=105, Invalid=707, Unknown=0, NotChecked=0, Total=812 [2021-06-12 19:24:35,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18588 states. [2021-06-12 19:24:35,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18588 to 15189. [2021-06-12 19:24:35,228 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) [2021-06-12 19:24:35,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15189 states to 15189 states and 39005 transitions. [2021-06-12 19:24:35,252 INFO L78 Accepts]: Start accepts. Automaton has 15189 states and 39005 transitions. Word has length 59 [2021-06-12 19:24:35,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:24:35,252 INFO L482 AbstractCegarLoop]: Abstraction has 15189 states and 39005 transitions. [2021-06-12 19:24:35,252 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) [2021-06-12 19:24:35,252 INFO L276 IsEmpty]: Start isEmpty. Operand 15189 states and 39005 transitions. [2021-06-12 19:24:35,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-12 19:24:35,262 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:24:35,262 INFO L472 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:24:35,463 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 452 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable932 [2021-06-12 19:24:35,463 INFO L430 AbstractCegarLoop]: === Iteration 461 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:24:35,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:24:35,463 INFO L82 PathProgramCache]: Analyzing trace with hash 1443086082, now seen corresponding path program 273 times [2021-06-12 19:24:35,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:24:35,463 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11670976] [2021-06-12 19:24:35,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:24:35,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:24:35,538 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 47 proven. 130 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:24:35,538 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:24:35,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11670976] [2021-06-12 19:24:35,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11670976] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:35,538 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963114641] [2021-06-12 19:24:35,538 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 [2021-06-12 19:24:35,570 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-06-12 19:24:35,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:24:35,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 19:24:35,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:24:35,658 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 47 proven. 130 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:24:35,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [963114641] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:35,658 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:24:35,658 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-06-12 19:24:35,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418270792] [2021-06-12 19:24:35,658 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:24:35,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:24:35,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:24:35,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:24:35,659 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) [2021-06-12 19:24:35,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:24:35,916 INFO L93 Difference]: Finished difference Result 17831 states and 43702 transitions. [2021-06-12 19:24:35,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:24:35,916 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 [2021-06-12 19:24:35,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:24:35,935 INFO L225 Difference]: With dead ends: 17831 [2021-06-12 19:24:35,935 INFO L226 Difference]: Without dead ends: 17807 [2021-06-12 19:24:35,935 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 84.6ms TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:24:35,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17807 states. [2021-06-12 19:24:36,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17807 to 15189. [2021-06-12 19:24:36,135 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) [2021-06-12 19:24:36,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15189 states to 15189 states and 38991 transitions. [2021-06-12 19:24:36,160 INFO L78 Accepts]: Start accepts. Automaton has 15189 states and 38991 transitions. Word has length 59 [2021-06-12 19:24:36,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:24:36,160 INFO L482 AbstractCegarLoop]: Abstraction has 15189 states and 38991 transitions. [2021-06-12 19:24:36,160 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) [2021-06-12 19:24:36,160 INFO L276 IsEmpty]: Start isEmpty. Operand 15189 states and 38991 transitions. [2021-06-12 19:24:36,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-12 19:24:36,170 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:24:36,170 INFO L472 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:24:36,370 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable933,453 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:24:36,370 INFO L430 AbstractCegarLoop]: === Iteration 462 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:24:36,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:24:36,371 INFO L82 PathProgramCache]: Analyzing trace with hash 65363507, now seen corresponding path program 274 times [2021-06-12 19:24:36,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:24:36,371 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606824093] [2021-06-12 19:24:36,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:24:36,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:24:36,477 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 157 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:24:36,477 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:24:36,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606824093] [2021-06-12 19:24:36,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606824093] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:36,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930894119] [2021-06-12 19:24:36,477 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 [2021-06-12 19:24:36,505 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:24:36,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:24:36,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 19:24:36,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:24:36,590 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 158 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:24:36,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [930894119] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:36,591 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:24:36,591 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-12 19:24:36,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941357582] [2021-06-12 19:24:36,591 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:24:36,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:24:36,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:24:36,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:24:36,591 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) [2021-06-12 19:24:37,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:24:37,643 INFO L93 Difference]: Finished difference Result 23093 states and 55993 transitions. [2021-06-12 19:24:37,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-12 19:24:37,644 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 [2021-06-12 19:24:37,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:24:37,671 INFO L225 Difference]: With dead ends: 23093 [2021-06-12 19:24:37,671 INFO L226 Difference]: Without dead ends: 22913 [2021-06-12 19:24:37,671 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 415.5ms TimeCoverageRelationStatistics Valid=231, Invalid=1749, Unknown=0, NotChecked=0, Total=1980 [2021-06-12 19:24:37,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22913 states. [2021-06-12 19:24:37,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22913 to 15680. [2021-06-12 19:24:37,937 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) [2021-06-12 19:24:37,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15680 states to 15680 states and 40270 transitions. [2021-06-12 19:24:37,961 INFO L78 Accepts]: Start accepts. Automaton has 15680 states and 40270 transitions. Word has length 59 [2021-06-12 19:24:37,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:24:37,962 INFO L482 AbstractCegarLoop]: Abstraction has 15680 states and 40270 transitions. [2021-06-12 19:24:37,962 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) [2021-06-12 19:24:37,962 INFO L276 IsEmpty]: Start isEmpty. Operand 15680 states and 40270 transitions. [2021-06-12 19:24:37,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-12 19:24:37,972 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:24:37,972 INFO L472 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:24:38,172 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable937,454 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:24:38,172 INFO L430 AbstractCegarLoop]: === Iteration 463 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:24:38,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:24:38,173 INFO L82 PathProgramCache]: Analyzing trace with hash 451966184, now seen corresponding path program 275 times [2021-06-12 19:24:38,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:24:38,173 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851532961] [2021-06-12 19:24:38,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:24:38,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:24:38,256 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 45 proven. 132 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:24:38,256 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:24:38,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851532961] [2021-06-12 19:24:38,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851532961] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:38,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246040326] [2021-06-12 19:24:38,256 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 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 [2021-06-12 19:24:38,287 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-06-12 19:24:38,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:24:38,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 19:24:38,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:24:38,398 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 46 proven. 132 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:24:38,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [246040326] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:38,398 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:24:38,398 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 17 [2021-06-12 19:24:38,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119784781] [2021-06-12 19:24:38,398 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:24:38,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:24:38,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:24:38,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:24:38,399 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) [2021-06-12 19:24:38,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:24:38,676 INFO L93 Difference]: Finished difference Result 18578 states and 45476 transitions. [2021-06-12 19:24:38,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 19:24:38,676 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 [2021-06-12 19:24:38,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:24:38,699 INFO L225 Difference]: With dead ends: 18578 [2021-06-12 19:24:38,699 INFO L226 Difference]: Without dead ends: 18545 [2021-06-12 19:24:38,699 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 132.8ms TimeCoverageRelationStatistics Valid=127, Invalid=335, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:24:38,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18545 states. [2021-06-12 19:24:38,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18545 to 15680. [2021-06-12 19:24:38,905 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) [2021-06-12 19:24:38,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15680 states to 15680 states and 40261 transitions. [2021-06-12 19:24:38,931 INFO L78 Accepts]: Start accepts. Automaton has 15680 states and 40261 transitions. Word has length 59 [2021-06-12 19:24:38,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:24:38,931 INFO L482 AbstractCegarLoop]: Abstraction has 15680 states and 40261 transitions. [2021-06-12 19:24:38,931 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) [2021-06-12 19:24:38,931 INFO L276 IsEmpty]: Start isEmpty. Operand 15680 states and 40261 transitions. [2021-06-12 19:24:38,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-12 19:24:38,941 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:24:38,941 INFO L472 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:24:39,141 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable938,455 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:24:39,141 INFO L430 AbstractCegarLoop]: === Iteration 464 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:24:39,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:24:39,142 INFO L82 PathProgramCache]: Analyzing trace with hash 5671997, now seen corresponding path program 276 times [2021-06-12 19:24:39,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:24:39,142 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069423751] [2021-06-12 19:24:39,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:24:39,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:24:39,254 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 157 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:24:39,254 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:24:39,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069423751] [2021-06-12 19:24:39,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069423751] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:39,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025989837] [2021-06-12 19:24:39,255 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 [2021-06-12 19:24:39,287 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-06-12 19:24:39,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:24:39,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 19:24:39,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:24:39,372 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 158 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:24:39,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1025989837] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:39,372 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:24:39,372 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-12 19:24:39,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564485315] [2021-06-12 19:24:39,372 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:24:39,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:24:39,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:24:39,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:24:39,373 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) [2021-06-12 19:24:40,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:24:40,835 INFO L93 Difference]: Finished difference Result 28722 states and 68889 transitions. [2021-06-12 19:24:40,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-06-12 19:24:40,835 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 [2021-06-12 19:24:40,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:24:40,944 INFO L225 Difference]: With dead ends: 28722 [2021-06-12 19:24:40,944 INFO L226 Difference]: Without dead ends: 28446 [2021-06-12 19:24:40,945 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 61 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1479 ImplicationChecksByTransitivity, 738.3ms TimeCoverageRelationStatistics Valid=501, Invalid=4191, Unknown=0, NotChecked=0, Total=4692 [2021-06-12 19:24:40,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28446 states. [2021-06-12 19:24:41,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28446 to 16072. [2021-06-12 19:24:41,179 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) [2021-06-12 19:24:41,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16072 states to 16072 states and 41285 transitions. [2021-06-12 19:24:41,204 INFO L78 Accepts]: Start accepts. Automaton has 16072 states and 41285 transitions. Word has length 59 [2021-06-12 19:24:41,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:24:41,204 INFO L482 AbstractCegarLoop]: Abstraction has 16072 states and 41285 transitions. [2021-06-12 19:24:41,204 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) [2021-06-12 19:24:41,204 INFO L276 IsEmpty]: Start isEmpty. Operand 16072 states and 41285 transitions. [2021-06-12 19:24:41,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-12 19:24:41,214 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:24:41,215 INFO L472 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:24:41,415 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 456 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable943 [2021-06-12 19:24:41,415 INFO L430 AbstractCegarLoop]: === Iteration 465 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:24:41,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:24:41,415 INFO L82 PathProgramCache]: Analyzing trace with hash 1899244866, now seen corresponding path program 277 times [2021-06-12 19:24:41,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:24:41,415 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65639358] [2021-06-12 19:24:41,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:24:41,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:24:41,511 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 49 proven. 128 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:24:41,511 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:24:41,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65639358] [2021-06-12 19:24:41,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65639358] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:41,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583041353] [2021-06-12 19:24:41,512 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 [2021-06-12 19:24:41,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:24:41,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 19:24:41,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:24:41,625 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 49 proven. 128 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:24:41,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [583041353] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:41,625 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:24:41,625 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-06-12 19:24:41,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804927392] [2021-06-12 19:24:41,626 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:24:41,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:24:41,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:24:41,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:24:41,626 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) [2021-06-12 19:24:41,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:24:41,942 INFO L93 Difference]: Finished difference Result 18886 states and 46305 transitions. [2021-06-12 19:24:41,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:24:41,942 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 [2021-06-12 19:24:41,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:24:41,964 INFO L225 Difference]: With dead ends: 18886 [2021-06-12 19:24:41,964 INFO L226 Difference]: Without dead ends: 18844 [2021-06-12 19:24:41,964 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 124.5ms TimeCoverageRelationStatistics Valid=119, Invalid=261, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:24:41,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18844 states. [2021-06-12 19:24:42,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18844 to 15745. [2021-06-12 19:24:42,179 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) [2021-06-12 19:24:42,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15745 states to 15745 states and 40377 transitions. [2021-06-12 19:24:42,204 INFO L78 Accepts]: Start accepts. Automaton has 15745 states and 40377 transitions. Word has length 59 [2021-06-12 19:24:42,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:24:42,204 INFO L482 AbstractCegarLoop]: Abstraction has 15745 states and 40377 transitions. [2021-06-12 19:24:42,205 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) [2021-06-12 19:24:42,205 INFO L276 IsEmpty]: Start isEmpty. Operand 15745 states and 40377 transitions. [2021-06-12 19:24:42,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-12 19:24:42,215 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:24:42,215 INFO L472 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:24:42,415 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 457 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable944 [2021-06-12 19:24:42,416 INFO L430 AbstractCegarLoop]: === Iteration 466 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:24:42,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:24:42,416 INFO L82 PathProgramCache]: Analyzing trace with hash -147641869, now seen corresponding path program 278 times [2021-06-12 19:24:42,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:24:42,416 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000078852] [2021-06-12 19:24:42,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:24:42,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:24:42,543 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 160 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:24:42,544 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:24:42,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000078852] [2021-06-12 19:24:42,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000078852] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:42,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266262781] [2021-06-12 19:24:42,544 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 [2021-06-12 19:24:42,572 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:24:42,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:24:42,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 19:24:42,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:24:42,657 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 160 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:24:42,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [266262781] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:42,657 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:24:42,657 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-12 19:24:42,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643281088] [2021-06-12 19:24:42,657 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:24:42,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:24:42,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:24:42,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:24:42,657 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) [2021-06-12 19:24:43,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:24:43,468 INFO L93 Difference]: Finished difference Result 22153 states and 53662 transitions. [2021-06-12 19:24:43,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 19:24:43,468 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 [2021-06-12 19:24:43,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:24:43,493 INFO L225 Difference]: With dead ends: 22153 [2021-06-12 19:24:43,494 INFO L226 Difference]: Without dead ends: 21775 [2021-06-12 19:24:43,494 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 60 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 309.1ms TimeCoverageRelationStatistics Valid=144, Invalid=848, Unknown=0, NotChecked=0, Total=992 [2021-06-12 19:24:43,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21775 states. [2021-06-12 19:24:43,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21775 to 14506. [2021-06-12 19:24:43,735 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) [2021-06-12 19:24:43,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14506 states to 14506 states and 37052 transitions. [2021-06-12 19:24:43,756 INFO L78 Accepts]: Start accepts. Automaton has 14506 states and 37052 transitions. Word has length 59 [2021-06-12 19:24:43,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:24:43,756 INFO L482 AbstractCegarLoop]: Abstraction has 14506 states and 37052 transitions. [2021-06-12 19:24:43,756 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) [2021-06-12 19:24:43,756 INFO L276 IsEmpty]: Start isEmpty. Operand 14506 states and 37052 transitions. [2021-06-12 19:24:43,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-12 19:24:43,765 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:24:43,765 INFO L472 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:24:43,965 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 458 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable950 [2021-06-12 19:24:43,965 INFO L430 AbstractCegarLoop]: === Iteration 467 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:24:43,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:24:43,965 INFO L82 PathProgramCache]: Analyzing trace with hash -385703386, now seen corresponding path program 130 times [2021-06-12 19:24:43,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:24:43,966 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690926490] [2021-06-12 19:24:43,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:24:43,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:24:44,031 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 138 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:24:44,031 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:24:44,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690926490] [2021-06-12 19:24:44,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690926490] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:44,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306194004] [2021-06-12 19:24:44,031 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-12 19:24:44,058 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:24:44,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:24:44,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 19:24:44,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:24:44,145 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 139 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:24:44,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1306194004] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:44,145 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:24:44,145 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 12 [2021-06-12 19:24:44,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508730711] [2021-06-12 19:24:44,145 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:24:44,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:24:44,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:24:44,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=91, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:24:44,145 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) [2021-06-12 19:24:44,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:24:44,376 INFO L93 Difference]: Finished difference Result 18216 states and 44603 transitions. [2021-06-12 19:24:44,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:24:44,376 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 [2021-06-12 19:24:44,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:24:44,396 INFO L225 Difference]: With dead ends: 18216 [2021-06-12 19:24:44,396 INFO L226 Difference]: Without dead ends: 18202 [2021-06-12 19:24:44,396 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 71.9ms TimeCoverageRelationStatistics Valid=85, Invalid=125, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:24:44,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18202 states. [2021-06-12 19:24:44,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18202 to 14941. [2021-06-12 19:24:44,570 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) [2021-06-12 19:24:44,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14941 states to 14941 states and 38236 transitions. [2021-06-12 19:24:44,594 INFO L78 Accepts]: Start accepts. Automaton has 14941 states and 38236 transitions. Word has length 59 [2021-06-12 19:24:44,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:24:44,594 INFO L482 AbstractCegarLoop]: Abstraction has 14941 states and 38236 transitions. [2021-06-12 19:24:44,594 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) [2021-06-12 19:24:44,594 INFO L276 IsEmpty]: Start isEmpty. Operand 14941 states and 38236 transitions. [2021-06-12 19:24:44,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-12 19:24:44,603 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:24:44,603 INFO L472 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:24:44,803 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable951,459 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:24:44,804 INFO L430 AbstractCegarLoop]: === Iteration 468 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:24:44,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:24:44,804 INFO L82 PathProgramCache]: Analyzing trace with hash -1007583796, now seen corresponding path program 131 times [2021-06-12 19:24:44,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:24:44,804 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746583935] [2021-06-12 19:24:44,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:24:44,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:24:44,869 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 138 proven. 39 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:24:44,869 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:24:44,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746583935] [2021-06-12 19:24:44,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746583935] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:44,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519118794] [2021-06-12 19:24:44,869 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 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 [2021-06-12 19:24:44,902 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2021-06-12 19:24:44,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:24:44,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 19:24:44,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:24:45,004 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 139 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:24:45,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1519118794] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:45,004 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:24:45,004 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 14 [2021-06-12 19:24:45,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991419517] [2021-06-12 19:24:45,005 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:24:45,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:24:45,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:24:45,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=123, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:24:45,005 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) [2021-06-12 19:24:45,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:24:45,280 INFO L93 Difference]: Finished difference Result 23419 states and 56616 transitions. [2021-06-12 19:24:45,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 19:24:45,281 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 [2021-06-12 19:24:45,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:24:45,306 INFO L225 Difference]: With dead ends: 23419 [2021-06-12 19:24:45,306 INFO L226 Difference]: Without dead ends: 23419 [2021-06-12 19:24:45,306 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 110.9ms TimeCoverageRelationStatistics Valid=162, Invalid=218, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:24:45,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23419 states. [2021-06-12 19:24:45,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23419 to 14952. [2021-06-12 19:24:45,525 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) [2021-06-12 19:24:45,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14952 states to 14952 states and 38269 transitions. [2021-06-12 19:24:45,548 INFO L78 Accepts]: Start accepts. Automaton has 14952 states and 38269 transitions. Word has length 59 [2021-06-12 19:24:45,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:24:45,548 INFO L482 AbstractCegarLoop]: Abstraction has 14952 states and 38269 transitions. [2021-06-12 19:24:45,548 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) [2021-06-12 19:24:45,548 INFO L276 IsEmpty]: Start isEmpty. Operand 14952 states and 38269 transitions. [2021-06-12 19:24:45,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-12 19:24:45,557 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:24:45,558 INFO L472 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:24:45,758 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable953,460 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:24:45,758 INFO L430 AbstractCegarLoop]: === Iteration 469 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:24:45,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:24:45,758 INFO L82 PathProgramCache]: Analyzing trace with hash 1649811044, now seen corresponding path program 132 times [2021-06-12 19:24:45,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:24:45,758 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478234469] [2021-06-12 19:24:45,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:24:45,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:24:45,839 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 136 proven. 41 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:24:45,839 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:24:45,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478234469] [2021-06-12 19:24:45,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478234469] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:45,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392140327] [2021-06-12 19:24:45,839 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 [2021-06-12 19:24:45,872 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-06-12 19:24:45,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:24:45,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 19:24:45,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:24:45,965 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 137 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:24:45,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1392140327] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:45,965 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:24:45,965 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 13 [2021-06-12 19:24:45,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332844056] [2021-06-12 19:24:45,965 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:24:45,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:24:45,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:24:45,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:24:45,966 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) [2021-06-12 19:24:46,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:24:46,341 INFO L93 Difference]: Finished difference Result 25599 states and 61804 transitions. [2021-06-12 19:24:46,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 19:24:46,341 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 [2021-06-12 19:24:46,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:24:46,371 INFO L225 Difference]: With dead ends: 25599 [2021-06-12 19:24:46,371 INFO L226 Difference]: Without dead ends: 25599 [2021-06-12 19:24:46,371 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 145.9ms TimeCoverageRelationStatistics Valid=203, Invalid=303, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:24:46,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25599 states. [2021-06-12 19:24:46,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25599 to 14991. [2021-06-12 19:24:46,611 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) [2021-06-12 19:24:46,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14991 states to 14991 states and 38394 transitions. [2021-06-12 19:24:46,635 INFO L78 Accepts]: Start accepts. Automaton has 14991 states and 38394 transitions. Word has length 59 [2021-06-12 19:24:46,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:24:46,636 INFO L482 AbstractCegarLoop]: Abstraction has 14991 states and 38394 transitions. [2021-06-12 19:24:46,636 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) [2021-06-12 19:24:46,636 INFO L276 IsEmpty]: Start isEmpty. Operand 14991 states and 38394 transitions. [2021-06-12 19:24:46,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-12 19:24:46,646 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:24:46,646 INFO L472 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:24:46,846 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 461 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable954 [2021-06-12 19:24:46,846 INFO L430 AbstractCegarLoop]: === Iteration 470 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:24:46,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:24:46,846 INFO L82 PathProgramCache]: Analyzing trace with hash -40184120, now seen corresponding path program 133 times [2021-06-12 19:24:46,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:24:46,847 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166711104] [2021-06-12 19:24:46,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:24:46,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:24:46,933 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 126 proven. 51 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:24:46,934 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:24:46,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166711104] [2021-06-12 19:24:46,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166711104] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:46,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347276385] [2021-06-12 19:24:46,934 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 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 [2021-06-12 19:24:46,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:24:46,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 19:24:46,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:24:47,054 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 127 proven. 51 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:24:47,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [347276385] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:47,054 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:24:47,054 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 14 [2021-06-12 19:24:47,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955135417] [2021-06-12 19:24:47,054 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:24:47,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:24:47,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:24:47,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:24:47,055 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) [2021-06-12 19:24:47,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:24:47,508 INFO L93 Difference]: Finished difference Result 25335 states and 61221 transitions. [2021-06-12 19:24:47,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 19:24:47,509 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 [2021-06-12 19:24:47,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:24:47,542 INFO L225 Difference]: With dead ends: 25335 [2021-06-12 19:24:47,542 INFO L226 Difference]: Without dead ends: 25335 [2021-06-12 19:24:47,542 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 176.6ms TimeCoverageRelationStatistics Valid=254, Invalid=396, Unknown=0, NotChecked=0, Total=650 [2021-06-12 19:24:47,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25335 states. [2021-06-12 19:24:47,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25335 to 15025. [2021-06-12 19:24:47,780 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) [2021-06-12 19:24:47,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15025 states to 15025 states and 38498 transitions. [2021-06-12 19:24:47,803 INFO L78 Accepts]: Start accepts. Automaton has 15025 states and 38498 transitions. Word has length 59 [2021-06-12 19:24:47,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:24:47,804 INFO L482 AbstractCegarLoop]: Abstraction has 15025 states and 38498 transitions. [2021-06-12 19:24:47,804 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) [2021-06-12 19:24:47,804 INFO L276 IsEmpty]: Start isEmpty. Operand 15025 states and 38498 transitions. [2021-06-12 19:24:47,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-12 19:24:47,814 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:24:47,814 INFO L472 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:24:48,014 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 462 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable955 [2021-06-12 19:24:48,014 INFO L430 AbstractCegarLoop]: === Iteration 471 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:24:48,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:24:48,014 INFO L82 PathProgramCache]: Analyzing trace with hash -1079471132, now seen corresponding path program 134 times [2021-06-12 19:24:48,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:24:48,014 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011162626] [2021-06-12 19:24:48,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:24:48,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:24:48,113 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 116 proven. 61 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:24:48,113 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:24:48,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011162626] [2021-06-12 19:24:48,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011162626] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:48,113 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924978138] [2021-06-12 19:24:48,113 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 [2021-06-12 19:24:48,141 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:24:48,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:24:48,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 19:24:48,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:24:48,235 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 117 proven. 61 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:24:48,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [924978138] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:48,235 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:24:48,235 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 15 [2021-06-12 19:24:48,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204735444] [2021-06-12 19:24:48,235 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:24:48,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:24:48,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:24:48,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:24:48,236 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) [2021-06-12 19:24:48,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:24:48,631 INFO L93 Difference]: Finished difference Result 22714 states and 55093 transitions. [2021-06-12 19:24:48,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 19:24:48,631 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 [2021-06-12 19:24:48,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:24:48,658 INFO L225 Difference]: With dead ends: 22714 [2021-06-12 19:24:48,658 INFO L226 Difference]: Without dead ends: 22714 [2021-06-12 19:24:48,658 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 195.7ms TimeCoverageRelationStatistics Valid=268, Invalid=434, Unknown=0, NotChecked=0, Total=702 [2021-06-12 19:24:48,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22714 states. [2021-06-12 19:24:48,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22714 to 15046. [2021-06-12 19:24:48,905 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) [2021-06-12 19:24:48,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15046 states to 15046 states and 38555 transitions. [2021-06-12 19:24:48,930 INFO L78 Accepts]: Start accepts. Automaton has 15046 states and 38555 transitions. Word has length 59 [2021-06-12 19:24:48,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:24:48,930 INFO L482 AbstractCegarLoop]: Abstraction has 15046 states and 38555 transitions. [2021-06-12 19:24:48,930 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) [2021-06-12 19:24:48,930 INFO L276 IsEmpty]: Start isEmpty. Operand 15046 states and 38555 transitions. [2021-06-12 19:24:48,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-12 19:24:48,941 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:24:48,941 INFO L472 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:24:49,141 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable956,463 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:24:49,141 INFO L430 AbstractCegarLoop]: === Iteration 472 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:24:49,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:24:49,141 INFO L82 PathProgramCache]: Analyzing trace with hash -59608760, now seen corresponding path program 135 times [2021-06-12 19:24:49,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:24:49,142 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222257837] [2021-06-12 19:24:49,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:24:49,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:24:49,251 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 106 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:24:49,251 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:24:49,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222257837] [2021-06-12 19:24:49,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222257837] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:49,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665416844] [2021-06-12 19:24:49,251 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-12 19:24:49,284 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-06-12 19:24:49,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:24:49,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 19:24:49,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:24:49,379 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 107 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:24:49,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [665416844] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:49,379 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:24:49,379 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 16 [2021-06-12 19:24:49,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927144944] [2021-06-12 19:24:49,380 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:24:49,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:24:49,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:24:49,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:24:49,380 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) [2021-06-12 19:24:49,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:24:49,767 INFO L93 Difference]: Finished difference Result 18929 states and 46502 transitions. [2021-06-12 19:24:49,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:24:49,768 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 [2021-06-12 19:24:49,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:24:49,790 INFO L225 Difference]: With dead ends: 18929 [2021-06-12 19:24:49,790 INFO L226 Difference]: Without dead ends: 18929 [2021-06-12 19:24:49,790 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 190.3ms TimeCoverageRelationStatistics Valid=236, Invalid=414, Unknown=0, NotChecked=0, Total=650 [2021-06-12 19:24:49,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18929 states. [2021-06-12 19:24:49,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18929 to 14402. [2021-06-12 19:24:49,978 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) [2021-06-12 19:24:50,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14402 states to 14402 states and 36761 transitions. [2021-06-12 19:24:50,001 INFO L78 Accepts]: Start accepts. Automaton has 14402 states and 36761 transitions. Word has length 59 [2021-06-12 19:24:50,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:24:50,001 INFO L482 AbstractCegarLoop]: Abstraction has 14402 states and 36761 transitions. [2021-06-12 19:24:50,001 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) [2021-06-12 19:24:50,001 INFO L276 IsEmpty]: Start isEmpty. Operand 14402 states and 36761 transitions. [2021-06-12 19:24:50,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-12 19:24:50,011 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:24:50,011 INFO L472 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:24:50,211 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 464 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable957 [2021-06-12 19:24:50,212 INFO L430 AbstractCegarLoop]: === Iteration 473 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:24:50,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:24:50,212 INFO L82 PathProgramCache]: Analyzing trace with hash 601775784, now seen corresponding path program 279 times [2021-06-12 19:24:50,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:24:50,212 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728309382] [2021-06-12 19:24:50,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:24:50,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:24:50,319 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 60 proven. 118 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:24:50,319 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:24:50,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728309382] [2021-06-12 19:24:50,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728309382] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:50,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743778121] [2021-06-12 19:24:50,319 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 [2021-06-12 19:24:50,350 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-06-12 19:24:50,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:24:50,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 19:24:50,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:24:50,437 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 60 proven. 118 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:24:50,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [743778121] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:50,437 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:24:50,437 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-06-12 19:24:50,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802195522] [2021-06-12 19:24:50,437 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:24:50,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:24:50,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:24:50,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:24:50,437 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) [2021-06-12 19:24:50,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:24:50,747 INFO L93 Difference]: Finished difference Result 16717 states and 40878 transitions. [2021-06-12 19:24:50,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 19:24:50,747 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 [2021-06-12 19:24:50,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:24:50,765 INFO L225 Difference]: With dead ends: 16717 [2021-06-12 19:24:50,765 INFO L226 Difference]: Without dead ends: 16672 [2021-06-12 19:24:50,765 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 148.0ms TimeCoverageRelationStatistics Valid=140, Invalid=322, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:24:50,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16672 states. [2021-06-12 19:24:50,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16672 to 14402. [2021-06-12 19:24:50,941 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) [2021-06-12 19:24:50,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14402 states to 14402 states and 36752 transitions. [2021-06-12 19:24:50,963 INFO L78 Accepts]: Start accepts. Automaton has 14402 states and 36752 transitions. Word has length 59 [2021-06-12 19:24:50,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:24:50,963 INFO L482 AbstractCegarLoop]: Abstraction has 14402 states and 36752 transitions. [2021-06-12 19:24:50,963 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) [2021-06-12 19:24:50,963 INFO L276 IsEmpty]: Start isEmpty. Operand 14402 states and 36752 transitions. [2021-06-12 19:24:50,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-12 19:24:50,973 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:24:50,973 INFO L472 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:24:51,173 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable958,465 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:24:51,173 INFO L430 AbstractCegarLoop]: === Iteration 474 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:24:51,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:24:51,174 INFO L82 PathProgramCache]: Analyzing trace with hash 972677468, now seen corresponding path program 280 times [2021-06-12 19:24:51,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:24:51,174 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809170802] [2021-06-12 19:24:51,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:24:51,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:24:51,234 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 66 proven. 108 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-12 19:24:51,234 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:24:51,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809170802] [2021-06-12 19:24:51,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809170802] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:51,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199851144] [2021-06-12 19:24:51,234 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 [2021-06-12 19:24:51,262 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:24:51,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:24:51,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 19:24:51,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:24:51,345 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 66 proven. 108 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-12 19:24:51,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [199851144] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:51,346 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:24:51,346 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-12 19:24:51,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916642842] [2021-06-12 19:24:51,346 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:24:51,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:24:51,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:24:51,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:24:51,346 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) [2021-06-12 19:24:51,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:24:51,515 INFO L93 Difference]: Finished difference Result 17320 states and 42003 transitions. [2021-06-12 19:24:51,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:24:51,515 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 [2021-06-12 19:24:51,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:24:51,583 INFO L225 Difference]: With dead ends: 17320 [2021-06-12 19:24:51,583 INFO L226 Difference]: Without dead ends: 17317 [2021-06-12 19:24:51,583 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 55.2ms TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:24:51,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17317 states. [2021-06-12 19:24:51,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17317 to 14390. [2021-06-12 19:24:51,752 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) [2021-06-12 19:24:51,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14390 states to 14390 states and 36705 transitions. [2021-06-12 19:24:51,775 INFO L78 Accepts]: Start accepts. Automaton has 14390 states and 36705 transitions. Word has length 59 [2021-06-12 19:24:51,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:24:51,775 INFO L482 AbstractCegarLoop]: Abstraction has 14390 states and 36705 transitions. [2021-06-12 19:24:51,775 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) [2021-06-12 19:24:51,775 INFO L276 IsEmpty]: Start isEmpty. Operand 14390 states and 36705 transitions. [2021-06-12 19:24:51,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-12 19:24:51,785 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:24:51,785 INFO L472 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:24:51,985 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 466 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable965 [2021-06-12 19:24:51,986 INFO L430 AbstractCegarLoop]: === Iteration 475 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:24:51,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:24:51,986 INFO L82 PathProgramCache]: Analyzing trace with hash 1179740034, now seen corresponding path program 281 times [2021-06-12 19:24:51,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:24:51,986 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076841262] [2021-06-12 19:24:51,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:24:51,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:24:52,051 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 59 proven. 115 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-12 19:24:52,052 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:24:52,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076841262] [2021-06-12 19:24:52,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076841262] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:52,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472800973] [2021-06-12 19:24:52,052 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 [2021-06-12 19:24:52,084 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2021-06-12 19:24:52,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:24:52,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 19:24:52,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:24:52,181 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 63 proven. 115 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:24:52,181 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [472800973] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:52,181 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:24:52,181 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 14 [2021-06-12 19:24:52,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231656619] [2021-06-12 19:24:52,182 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:24:52,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:24:52,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:24:52,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:24:52,182 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) [2021-06-12 19:24:52,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:24:52,404 INFO L93 Difference]: Finished difference Result 17479 states and 42286 transitions. [2021-06-12 19:24:52,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 19:24:52,404 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 [2021-06-12 19:24:52,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:24:52,421 INFO L225 Difference]: With dead ends: 17479 [2021-06-12 19:24:52,422 INFO L226 Difference]: Without dead ends: 17461 [2021-06-12 19:24:52,422 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 96.1ms TimeCoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:24:52,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17461 states. [2021-06-12 19:24:52,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17461 to 14390. [2021-06-12 19:24:52,592 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) [2021-06-12 19:24:52,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14390 states to 14390 states and 36682 transitions. [2021-06-12 19:24:52,614 INFO L78 Accepts]: Start accepts. Automaton has 14390 states and 36682 transitions. Word has length 59 [2021-06-12 19:24:52,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:24:52,615 INFO L482 AbstractCegarLoop]: Abstraction has 14390 states and 36682 transitions. [2021-06-12 19:24:52,615 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) [2021-06-12 19:24:52,615 INFO L276 IsEmpty]: Start isEmpty. Operand 14390 states and 36682 transitions. [2021-06-12 19:24:52,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-12 19:24:52,624 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:24:52,624 INFO L472 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:24:52,824 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable967,467 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:24:52,824 INFO L430 AbstractCegarLoop]: === Iteration 476 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:24:52,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:24:52,825 INFO L82 PathProgramCache]: Analyzing trace with hash -268259979, now seen corresponding path program 282 times [2021-06-12 19:24:52,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:24:52,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37449568] [2021-06-12 19:24:52,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:24:52,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:24:52,913 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 20 proven. 154 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:24:52,913 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:24:52,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37449568] [2021-06-12 19:24:52,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37449568] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:52,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268581553] [2021-06-12 19:24:52,913 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 [2021-06-12 19:24:52,948 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-06-12 19:24:52,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:24:52,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 19:24:52,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:24:53,072 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 15 proven. 159 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:24:53,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [268581553] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:53,072 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:24:53,072 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-12 19:24:53,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803349155] [2021-06-12 19:24:53,073 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 19:24:53,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:24:53,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 19:24:53,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:24:53,073 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) [2021-06-12 19:24:53,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:24:53,781 INFO L93 Difference]: Finished difference Result 16064 states and 39766 transitions. [2021-06-12 19:24:53,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 19:24:53,782 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 [2021-06-12 19:24:53,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:24:53,799 INFO L225 Difference]: With dead ends: 16064 [2021-06-12 19:24:53,800 INFO L226 Difference]: Without dead ends: 15797 [2021-06-12 19:24:53,800 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 148.1ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:24:53,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15797 states. [2021-06-12 19:24:53,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15797 to 14403. [2021-06-12 19:24:53,978 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) [2021-06-12 19:24:54,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14403 states to 14403 states and 36587 transitions. [2021-06-12 19:24:54,001 INFO L78 Accepts]: Start accepts. Automaton has 14403 states and 36587 transitions. Word has length 59 [2021-06-12 19:24:54,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:24:54,001 INFO L482 AbstractCegarLoop]: Abstraction has 14403 states and 36587 transitions. [2021-06-12 19:24:54,001 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) [2021-06-12 19:24:54,001 INFO L276 IsEmpty]: Start isEmpty. Operand 14403 states and 36587 transitions. [2021-06-12 19:24:54,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-12 19:24:54,010 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:24:54,010 INFO L472 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:24:54,210 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 468 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable970 [2021-06-12 19:24:54,211 INFO L430 AbstractCegarLoop]: === Iteration 477 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:24:54,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:24:54,211 INFO L82 PathProgramCache]: Analyzing trace with hash -881796159, now seen corresponding path program 283 times [2021-06-12 19:24:54,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:24:54,211 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592969960] [2021-06-12 19:24:54,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:24:54,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:24:54,304 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 155 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-12 19:24:54,304 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:24:54,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592969960] [2021-06-12 19:24:54,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592969960] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:54,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731409389] [2021-06-12 19:24:54,304 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 [2021-06-12 19:24:54,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:24:54,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 19:24:54,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:24:54,488 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 156 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-12 19:24:54,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731409389] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:54,488 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:24:54,488 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-12 19:24:54,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88923690] [2021-06-12 19:24:54,488 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 19:24:54,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:24:54,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 19:24:54,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:24:54,488 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) [2021-06-12 19:24:55,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:24:55,056 INFO L93 Difference]: Finished difference Result 16239 states and 40254 transitions. [2021-06-12 19:24:55,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 19:24:55,056 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 [2021-06-12 19:24:55,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:24:55,073 INFO L225 Difference]: With dead ends: 16239 [2021-06-12 19:24:55,073 INFO L226 Difference]: Without dead ends: 16227 [2021-06-12 19:24:55,073 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 147.1ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:24:55,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16227 states. [2021-06-12 19:24:55,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16227 to 14558. [2021-06-12 19:24:55,234 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) [2021-06-12 19:24:55,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14558 states to 14558 states and 36978 transitions. [2021-06-12 19:24:55,255 INFO L78 Accepts]: Start accepts. Automaton has 14558 states and 36978 transitions. Word has length 59 [2021-06-12 19:24:55,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:24:55,255 INFO L482 AbstractCegarLoop]: Abstraction has 14558 states and 36978 transitions. [2021-06-12 19:24:55,256 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) [2021-06-12 19:24:55,256 INFO L276 IsEmpty]: Start isEmpty. Operand 14558 states and 36978 transitions. [2021-06-12 19:24:55,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-12 19:24:55,264 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:24:55,264 INFO L472 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:24:55,465 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable971,469 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:24:55,465 INFO L430 AbstractCegarLoop]: === Iteration 478 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:24:55,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:24:55,465 INFO L82 PathProgramCache]: Analyzing trace with hash -1039095646, now seen corresponding path program 136 times [2021-06-12 19:24:55,465 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:24:55,465 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129935704] [2021-06-12 19:24:55,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:24:55,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:24:55,549 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 115 proven. 62 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:24:55,549 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:24:55,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129935704] [2021-06-12 19:24:55,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129935704] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:55,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706228261] [2021-06-12 19:24:55,550 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-12 19:24:55,584 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:24:55,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:24:55,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 19:24:55,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:24:55,693 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 117 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:24:55,694 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1706228261] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:55,694 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:24:55,694 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 12 [2021-06-12 19:24:55,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949105534] [2021-06-12 19:24:55,694 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:24:55,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:24:55,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:24:55,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:24:55,694 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) [2021-06-12 19:24:55,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:24:55,951 INFO L93 Difference]: Finished difference Result 17769 states and 43570 transitions. [2021-06-12 19:24:55,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:24:55,952 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 [2021-06-12 19:24:55,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:24:55,973 INFO L225 Difference]: With dead ends: 17769 [2021-06-12 19:24:55,973 INFO L226 Difference]: Without dead ends: 17739 [2021-06-12 19:24:55,973 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 103.9ms TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:24:55,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17739 states. [2021-06-12 19:24:56,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17739 to 15059. [2021-06-12 19:24:56,160 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) [2021-06-12 19:24:56,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15059 states to 15059 states and 38331 transitions. [2021-06-12 19:24:56,182 INFO L78 Accepts]: Start accepts. Automaton has 15059 states and 38331 transitions. Word has length 59 [2021-06-12 19:24:56,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:24:56,182 INFO L482 AbstractCegarLoop]: Abstraction has 15059 states and 38331 transitions. [2021-06-12 19:24:56,182 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) [2021-06-12 19:24:56,182 INFO L276 IsEmpty]: Start isEmpty. Operand 15059 states and 38331 transitions. [2021-06-12 19:24:56,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-12 19:24:56,191 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:24:56,191 INFO L472 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:24:56,391 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 470 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable972 [2021-06-12 19:24:56,392 INFO L430 AbstractCegarLoop]: === Iteration 479 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:24:56,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:24:56,392 INFO L82 PathProgramCache]: Analyzing trace with hash 1260121175, now seen corresponding path program 284 times [2021-06-12 19:24:56,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:24:56,392 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438630092] [2021-06-12 19:24:56,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:24:56,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:24:56,485 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 157 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:24:56,485 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:24:56,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438630092] [2021-06-12 19:24:56,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438630092] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:56,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498465552] [2021-06-12 19:24:56,485 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 [2021-06-12 19:24:56,513 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:24:56,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:24:56,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 19:24:56,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:24:56,600 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 158 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:24:56,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498465552] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:56,600 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:24:56,600 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-12 19:24:56,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671119546] [2021-06-12 19:24:56,600 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:24:56,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:24:56,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:24:56,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:24:56,601 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) [2021-06-12 19:24:57,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:24:57,423 INFO L93 Difference]: Finished difference Result 19111 states and 46968 transitions. [2021-06-12 19:24:57,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-12 19:24:57,423 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 [2021-06-12 19:24:57,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:24:57,443 INFO L225 Difference]: With dead ends: 19111 [2021-06-12 19:24:57,443 INFO L226 Difference]: Without dead ends: 19057 [2021-06-12 19:24:57,443 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 254.6ms TimeCoverageRelationStatistics Valid=117, Invalid=813, Unknown=0, NotChecked=0, Total=930 [2021-06-12 19:24:57,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19057 states. [2021-06-12 19:24:57,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19057 to 15532. [2021-06-12 19:24:57,641 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) [2021-06-12 19:24:57,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15532 states to 15532 states and 39622 transitions. [2021-06-12 19:24:57,667 INFO L78 Accepts]: Start accepts. Automaton has 15532 states and 39622 transitions. Word has length 59 [2021-06-12 19:24:57,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:24:57,667 INFO L482 AbstractCegarLoop]: Abstraction has 15532 states and 39622 transitions. [2021-06-12 19:24:57,667 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) [2021-06-12 19:24:57,667 INFO L276 IsEmpty]: Start isEmpty. Operand 15532 states and 39622 transitions. [2021-06-12 19:24:57,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-12 19:24:57,677 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:24:57,677 INFO L472 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:24:57,877 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 471 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable975 [2021-06-12 19:24:57,878 INFO L430 AbstractCegarLoop]: === Iteration 480 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:24:57,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:24:57,878 INFO L82 PathProgramCache]: Analyzing trace with hash -1502287012, now seen corresponding path program 285 times [2021-06-12 19:24:57,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:24:57,878 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23456090] [2021-06-12 19:24:57,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:24:57,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:24:57,951 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 48 proven. 129 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:24:57,951 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:24:57,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23456090] [2021-06-12 19:24:57,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [23456090] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:57,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896391397] [2021-06-12 19:24:57,952 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 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 [2021-06-12 19:24:57,984 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-06-12 19:24:57,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:24:57,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 19:24:57,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:24:58,068 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 48 proven. 129 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:24:58,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [896391397] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:58,068 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:24:58,068 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-06-12 19:24:58,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905144819] [2021-06-12 19:24:58,068 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:24:58,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:24:58,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:24:58,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:24:58,068 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) [2021-06-12 19:24:58,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:24:58,279 INFO L93 Difference]: Finished difference Result 18411 states and 44785 transitions. [2021-06-12 19:24:58,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:24:58,280 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 [2021-06-12 19:24:58,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:24:58,300 INFO L225 Difference]: With dead ends: 18411 [2021-06-12 19:24:58,300 INFO L226 Difference]: Without dead ends: 18387 [2021-06-12 19:24:58,301 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 84.1ms TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:24:58,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18387 states. [2021-06-12 19:24:58,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18387 to 15532. [2021-06-12 19:24:58,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15532 states, 15531 states have (on average 2.54993239327796) internal successors, (39603), 15531 states have internal predecessors, (39603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:24:58,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15532 states to 15532 states and 39603 transitions. [2021-06-12 19:24:58,535 INFO L78 Accepts]: Start accepts. Automaton has 15532 states and 39603 transitions. Word has length 59 [2021-06-12 19:24:58,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:24:58,535 INFO L482 AbstractCegarLoop]: Abstraction has 15532 states and 39603 transitions. [2021-06-12 19:24:58,535 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) [2021-06-12 19:24:58,535 INFO L276 IsEmpty]: Start isEmpty. Operand 15532 states and 39603 transitions. [2021-06-12 19:24:58,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-12 19:24:58,545 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:24:58,545 INFO L472 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:24:58,745 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 472 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable976 [2021-06-12 19:24:58,745 INFO L430 AbstractCegarLoop]: === Iteration 481 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:24:58,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:24:58,746 INFO L82 PathProgramCache]: Analyzing trace with hash 1414957709, now seen corresponding path program 286 times [2021-06-12 19:24:58,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:24:58,746 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651929617] [2021-06-12 19:24:58,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:24:58,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:24:58,849 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 157 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:24:58,849 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:24:58,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651929617] [2021-06-12 19:24:58,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651929617] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:58,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363330] [2021-06-12 19:24:58,849 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 [2021-06-12 19:24:58,877 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:24:58,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:24:58,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 19:24:58,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:24:58,964 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 158 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:24:58,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1363330] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:24:58,964 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:24:58,964 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-12 19:24:58,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976394476] [2021-06-12 19:24:58,964 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:24:58,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:24:58,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:24:58,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:24:58,965 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) [2021-06-12 19:25:00,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:25:00,091 INFO L93 Difference]: Finished difference Result 24361 states and 58995 transitions. [2021-06-12 19:25:00,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-12 19:25:00,092 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 [2021-06-12 19:25:00,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:25:00,120 INFO L225 Difference]: With dead ends: 24361 [2021-06-12 19:25:00,120 INFO L226 Difference]: Without dead ends: 24193 [2021-06-12 19:25:00,121 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 702 ImplicationChecksByTransitivity, 477.6ms TimeCoverageRelationStatistics Valid=279, Invalid=2271, Unknown=0, NotChecked=0, Total=2550 [2021-06-12 19:25:00,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24193 states. [2021-06-12 19:25:00,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24193 to 16448. [2021-06-12 19:25:00,419 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) [2021-06-12 19:25:00,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16448 states to 16448 states and 42038 transitions. [2021-06-12 19:25:00,447 INFO L78 Accepts]: Start accepts. Automaton has 16448 states and 42038 transitions. Word has length 59 [2021-06-12 19:25:00,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:25:00,447 INFO L482 AbstractCegarLoop]: Abstraction has 16448 states and 42038 transitions. [2021-06-12 19:25:00,447 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) [2021-06-12 19:25:00,447 INFO L276 IsEmpty]: Start isEmpty. Operand 16448 states and 42038 transitions. [2021-06-12 19:25:00,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-12 19:25:00,458 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:25:00,458 INFO L472 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:25:00,658 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable980,473 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:25:00,658 INFO L430 AbstractCegarLoop]: === Iteration 482 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:25:00,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:25:00,658 INFO L82 PathProgramCache]: Analyzing trace with hash 1801560386, now seen corresponding path program 287 times [2021-06-12 19:25:00,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:25:00,659 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189562382] [2021-06-12 19:25:00,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:25:00,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:25:00,745 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 43 proven. 134 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:25:00,745 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:25:00,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189562382] [2021-06-12 19:25:00,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189562382] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:25:00,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33206248] [2021-06-12 19:25:00,745 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 [2021-06-12 19:25:00,776 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-06-12 19:25:00,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:25:00,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 19:25:00,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:25:00,881 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 43 proven. 134 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:25:00,881 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [33206248] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:25:00,881 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:25:00,881 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 16 [2021-06-12 19:25:00,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782567546] [2021-06-12 19:25:00,881 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:25:00,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:25:00,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:25:00,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:25:00,881 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) [2021-06-12 19:25:01,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:25:01,210 INFO L93 Difference]: Finished difference Result 19584 states and 47707 transitions. [2021-06-12 19:25:01,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:25:01,210 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 [2021-06-12 19:25:01,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:25:01,235 INFO L225 Difference]: With dead ends: 19584 [2021-06-12 19:25:01,235 INFO L226 Difference]: Without dead ends: 19551 [2021-06-12 19:25:01,235 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 129.8ms TimeCoverageRelationStatistics Valid=122, Invalid=298, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:25:01,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19551 states. [2021-06-12 19:25:01,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19551 to 16448. [2021-06-12 19:25:01,459 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) [2021-06-12 19:25:01,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16448 states to 16448 states and 42023 transitions. [2021-06-12 19:25:01,484 INFO L78 Accepts]: Start accepts. Automaton has 16448 states and 42023 transitions. Word has length 59 [2021-06-12 19:25:01,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:25:01,485 INFO L482 AbstractCegarLoop]: Abstraction has 16448 states and 42023 transitions. [2021-06-12 19:25:01,485 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) [2021-06-12 19:25:01,485 INFO L276 IsEmpty]: Start isEmpty. Operand 16448 states and 42023 transitions. [2021-06-12 19:25:01,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-12 19:25:01,495 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:25:01,495 INFO L472 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:25:01,695 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 474 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable981 [2021-06-12 19:25:01,695 INFO L430 AbstractCegarLoop]: === Iteration 483 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:25:01,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:25:01,696 INFO L82 PathProgramCache]: Analyzing trace with hash 1355266199, now seen corresponding path program 288 times [2021-06-12 19:25:01,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:25:01,696 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205106621] [2021-06-12 19:25:01,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:25:01,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:25:01,812 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 157 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:25:01,812 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:25:01,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205106621] [2021-06-12 19:25:01,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205106621] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:25:01,812 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417930482] [2021-06-12 19:25:01,812 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-12 19:25:01,846 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-06-12 19:25:01,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:25:01,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 19:25:01,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:25:01,932 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 158 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:25:01,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [417930482] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:25:01,932 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:25:01,932 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-12 19:25:01,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790474170] [2021-06-12 19:25:01,932 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:25:01,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:25:01,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:25:01,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:25:01,933 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) [2021-06-12 19:25:03,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:25:03,696 INFO L93 Difference]: Finished difference Result 35626 states and 84935 transitions. [2021-06-12 19:25:03,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-06-12 19:25:03,697 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 [2021-06-12 19:25:03,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:25:03,737 INFO L225 Difference]: With dead ends: 35626 [2021-06-12 19:25:03,737 INFO L226 Difference]: Without dead ends: 35104 [2021-06-12 19:25:03,737 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 61 SyntacticMatches, 2 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2343 ImplicationChecksByTransitivity, 921.6ms TimeCoverageRelationStatistics Valid=657, Invalid=6149, Unknown=0, NotChecked=0, Total=6806 [2021-06-12 19:25:03,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35104 states. [2021-06-12 19:25:04,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35104 to 17932. [2021-06-12 19:25:04,067 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) [2021-06-12 19:25:04,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17932 states to 17932 states and 45917 transitions. [2021-06-12 19:25:04,098 INFO L78 Accepts]: Start accepts. Automaton has 17932 states and 45917 transitions. Word has length 59 [2021-06-12 19:25:04,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:25:04,099 INFO L482 AbstractCegarLoop]: Abstraction has 17932 states and 45917 transitions. [2021-06-12 19:25:04,099 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) [2021-06-12 19:25:04,099 INFO L276 IsEmpty]: Start isEmpty. Operand 17932 states and 45917 transitions. [2021-06-12 19:25:04,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-12 19:25:04,110 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:25:04,110 INFO L472 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:25:04,310 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable986,475 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:25:04,310 INFO L430 AbstractCegarLoop]: === Iteration 484 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:25:04,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:25:04,310 INFO L82 PathProgramCache]: Analyzing trace with hash -1046128228, now seen corresponding path program 289 times [2021-06-12 19:25:04,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:25:04,311 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716572745] [2021-06-12 19:25:04,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:25:04,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:25:04,406 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 44 proven. 133 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:25:04,406 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:25:04,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716572745] [2021-06-12 19:25:04,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716572745] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:25:04,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107225461] [2021-06-12 19:25:04,407 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 [2021-06-12 19:25:04,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:25:04,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 19:25:04,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:25:04,519 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 44 proven. 133 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:25:04,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [107225461] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:25:04,519 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:25:04,519 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-06-12 19:25:04,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20015233] [2021-06-12 19:25:04,520 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:25:04,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:25:04,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:25:04,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:25:04,520 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) [2021-06-12 19:25:04,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:25:04,792 INFO L93 Difference]: Finished difference Result 21190 states and 51795 transitions. [2021-06-12 19:25:04,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:25:04,792 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 [2021-06-12 19:25:04,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:25:04,818 INFO L225 Difference]: With dead ends: 21190 [2021-06-12 19:25:04,818 INFO L226 Difference]: Without dead ends: 21148 [2021-06-12 19:25:04,818 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 126.1ms TimeCoverageRelationStatistics Valid=124, Invalid=256, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:25:04,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21148 states. [2021-06-12 19:25:05,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21148 to 17932. [2021-06-12 19:25:05,074 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) [2021-06-12 19:25:05,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17932 states to 17932 states and 45902 transitions. [2021-06-12 19:25:05,103 INFO L78 Accepts]: Start accepts. Automaton has 17932 states and 45902 transitions. Word has length 59 [2021-06-12 19:25:05,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:25:05,104 INFO L482 AbstractCegarLoop]: Abstraction has 17932 states and 45902 transitions. [2021-06-12 19:25:05,104 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) [2021-06-12 19:25:05,104 INFO L276 IsEmpty]: Start isEmpty. Operand 17932 states and 45902 transitions. [2021-06-12 19:25:05,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-12 19:25:05,115 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:25:05,115 INFO L472 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:25:05,315 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 476 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable987 [2021-06-12 19:25:05,315 INFO L430 AbstractCegarLoop]: === Iteration 485 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:25:05,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:25:05,315 INFO L82 PathProgramCache]: Analyzing trace with hash 1201952333, now seen corresponding path program 290 times [2021-06-12 19:25:05,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:25:05,315 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481889720] [2021-06-12 19:25:05,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:25:05,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:25:05,441 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 157 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:25:05,441 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:25:05,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481889720] [2021-06-12 19:25:05,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481889720] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:25:05,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896742647] [2021-06-12 19:25:05,441 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 [2021-06-12 19:25:05,470 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:25:05,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:25:05,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 19:25:05,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:25:05,556 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 158 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:25:05,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896742647] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:25:05,557 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:25:05,557 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-12 19:25:05,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646959742] [2021-06-12 19:25:05,557 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:25:05,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:25:05,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:25:05,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:25:05,557 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) [2021-06-12 19:25:08,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:25:08,160 INFO L93 Difference]: Finished difference Result 45251 states and 107889 transitions. [2021-06-12 19:25:08,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2021-06-12 19:25:08,161 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 [2021-06-12 19:25:08,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:25:08,229 INFO L225 Difference]: With dead ends: 45251 [2021-06-12 19:25:08,230 INFO L226 Difference]: Without dead ends: 44633 [2021-06-12 19:25:08,231 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 60 SyntacticMatches, 2 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6679 ImplicationChecksByTransitivity, 1702.8ms TimeCoverageRelationStatistics Valid=1467, Invalid=15563, Unknown=0, NotChecked=0, Total=17030 [2021-06-12 19:25:08,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44633 states. [2021-06-12 19:25:08,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44633 to 19324. [2021-06-12 19:25:08,652 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) [2021-06-12 19:25:08,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19324 states to 19324 states and 49528 transitions. [2021-06-12 19:25:08,683 INFO L78 Accepts]: Start accepts. Automaton has 19324 states and 49528 transitions. Word has length 59 [2021-06-12 19:25:08,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:25:08,683 INFO L482 AbstractCegarLoop]: Abstraction has 19324 states and 49528 transitions. [2021-06-12 19:25:08,683 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) [2021-06-12 19:25:08,683 INFO L276 IsEmpty]: Start isEmpty. Operand 19324 states and 49528 transitions. [2021-06-12 19:25:08,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-12 19:25:08,694 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:25:08,694 INFO L472 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:25:08,894 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 477 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable993 [2021-06-12 19:25:08,894 INFO L430 AbstractCegarLoop]: === Iteration 486 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:25:08,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:25:08,894 INFO L82 PathProgramCache]: Analyzing trace with hash 1951369986, now seen corresponding path program 291 times [2021-06-12 19:25:08,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:25:08,894 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354184368] [2021-06-12 19:25:08,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:25:08,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:25:09,003 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 51 proven. 126 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:25:09,003 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:25:09,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354184368] [2021-06-12 19:25:09,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354184368] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:25:09,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19776572] [2021-06-12 19:25:09,003 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 [2021-06-12 19:25:09,034 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-12 19:25:09,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:25:09,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 19:25:09,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:25:09,122 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 51 proven. 126 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:25:09,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [19776572] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:25:09,122 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:25:09,123 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-06-12 19:25:09,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551396708] [2021-06-12 19:25:09,123 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:25:09,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:25:09,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:25:09,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:25:09,123 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) [2021-06-12 19:25:09,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:25:09,440 INFO L93 Difference]: Finished difference Result 22688 states and 55618 transitions. [2021-06-12 19:25:09,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 19:25:09,440 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 [2021-06-12 19:25:09,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:25:09,465 INFO L225 Difference]: With dead ends: 22688 [2021-06-12 19:25:09,465 INFO L226 Difference]: Without dead ends: 22637 [2021-06-12 19:25:09,466 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 149.3ms TimeCoverageRelationStatistics Valid=146, Invalid=316, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:25:09,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22637 states. [2021-06-12 19:25:09,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22637 to 18993. [2021-06-12 19:25:09,719 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) [2021-06-12 19:25:09,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18993 states to 18993 states and 48619 transitions. [2021-06-12 19:25:09,752 INFO L78 Accepts]: Start accepts. Automaton has 18993 states and 48619 transitions. Word has length 59 [2021-06-12 19:25:09,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:25:09,752 INFO L482 AbstractCegarLoop]: Abstraction has 18993 states and 48619 transitions. [2021-06-12 19:25:09,752 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) [2021-06-12 19:25:09,752 INFO L276 IsEmpty]: Start isEmpty. Operand 18993 states and 48619 transitions. [2021-06-12 19:25:09,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-12 19:25:09,764 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:25:09,764 INFO L472 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:25:09,964 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 478 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable994 [2021-06-12 19:25:09,964 INFO L430 AbstractCegarLoop]: === Iteration 487 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:25:09,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:25:09,964 INFO L82 PathProgramCache]: Analyzing trace with hash -621194025, now seen corresponding path program 292 times [2021-06-12 19:25:09,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:25:09,965 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404558083] [2021-06-12 19:25:09,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:25:09,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:25:10,102 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 160 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:25:10,103 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:25:10,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404558083] [2021-06-12 19:25:10,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404558083] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:25:10,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476489604] [2021-06-12 19:25:10,103 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 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 [2021-06-12 19:25:10,131 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:25:10,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:25:10,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 19:25:10,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:25:10,216 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 160 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:25:10,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476489604] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:25:10,216 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:25:10,216 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-06-12 19:25:10,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808243068] [2021-06-12 19:25:10,216 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:25:10,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:25:10,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:25:10,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:25:10,217 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) [2021-06-12 19:25:11,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:25:11,127 INFO L93 Difference]: Finished difference Result 27005 states and 64480 transitions. [2021-06-12 19:25:11,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 19:25:11,128 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 [2021-06-12 19:25:11,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:25:11,164 INFO L225 Difference]: With dead ends: 27005 [2021-06-12 19:25:11,164 INFO L226 Difference]: Without dead ends: 26165 [2021-06-12 19:25:11,164 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 59 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 365.8ms TimeCoverageRelationStatistics Valid=181, Invalid=1009, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 19:25:11,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26165 states. [2021-06-12 19:25:11,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26165 to 14615. [2021-06-12 19:25:11,398 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) [2021-06-12 19:25:11,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14615 states to 14615 states and 36957 transitions. [2021-06-12 19:25:11,420 INFO L78 Accepts]: Start accepts. Automaton has 14615 states and 36957 transitions. Word has length 59 [2021-06-12 19:25:11,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:25:11,420 INFO L482 AbstractCegarLoop]: Abstraction has 14615 states and 36957 transitions. [2021-06-12 19:25:11,420 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) [2021-06-12 19:25:11,420 INFO L276 IsEmpty]: Start isEmpty. Operand 14615 states and 36957 transitions. [2021-06-12 19:25:11,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-12 19:25:11,430 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:25:11,430 INFO L472 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:25:11,630 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 479 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1001 [2021-06-12 19:25:11,631 INFO L430 AbstractCegarLoop]: === Iteration 488 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:25:11,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:25:11,631 INFO L82 PathProgramCache]: Analyzing trace with hash -1481135952, now seen corresponding path program 137 times [2021-06-12 19:25:11,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:25:11,631 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172659337] [2021-06-12 19:25:11,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:25:11,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:25:11,701 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 136 proven. 41 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:25:11,701 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:25:11,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172659337] [2021-06-12 19:25:11,701 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172659337] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:25:11,701 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82902974] [2021-06-12 19:25:11,701 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 [2021-06-12 19:25:11,736 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-06-12 19:25:11,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:25:11,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 19:25:11,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:25:11,842 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 137 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:25:11,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [82902974] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:25:11,842 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:25:11,842 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 14 [2021-06-12 19:25:11,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454475530] [2021-06-12 19:25:11,843 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:25:11,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:25:11,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:25:11,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=120, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:25:11,843 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) [2021-06-12 19:25:12,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:25:12,190 INFO L93 Difference]: Finished difference Result 22169 states and 53449 transitions. [2021-06-12 19:25:12,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 19:25:12,190 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 [2021-06-12 19:25:12,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:25:12,217 INFO L225 Difference]: With dead ends: 22169 [2021-06-12 19:25:12,217 INFO L226 Difference]: Without dead ends: 22169 [2021-06-12 19:25:12,217 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 124.7ms TimeCoverageRelationStatistics Valid=180, Invalid=240, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:25:12,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22169 states. [2021-06-12 19:25:12,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22169 to 14758. [2021-06-12 19:25:12,435 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) [2021-06-12 19:25:12,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14758 states to 14758 states and 37380 transitions. [2021-06-12 19:25:12,458 INFO L78 Accepts]: Start accepts. Automaton has 14758 states and 37380 transitions. Word has length 59 [2021-06-12 19:25:12,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:25:12,458 INFO L482 AbstractCegarLoop]: Abstraction has 14758 states and 37380 transitions. [2021-06-12 19:25:12,458 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) [2021-06-12 19:25:12,458 INFO L276 IsEmpty]: Start isEmpty. Operand 14758 states and 37380 transitions. [2021-06-12 19:25:12,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-12 19:25:12,467 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:25:12,467 INFO L472 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:25:12,667 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 480 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1002 [2021-06-12 19:25:12,667 INFO L430 AbstractCegarLoop]: === Iteration 489 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:25:12,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:25:12,668 INFO L82 PathProgramCache]: Analyzing trace with hash 1176258888, now seen corresponding path program 138 times [2021-06-12 19:25:12,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:25:12,668 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628212965] [2021-06-12 19:25:12,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:25:12,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:25:12,747 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 135 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:25:12,748 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:25:12,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628212965] [2021-06-12 19:25:12,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628212965] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:25:12,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976162327] [2021-06-12 19:25:12,748 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 [2021-06-12 19:25:12,781 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-06-12 19:25:12,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:25:12,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 19:25:12,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:25:12,874 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 136 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:25:12,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976162327] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:25:12,874 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:25:12,874 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 13 [2021-06-12 19:25:12,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27862598] [2021-06-12 19:25:12,874 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:25:12,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:25:12,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:25:12,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:25:12,875 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) [2021-06-12 19:25:13,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:25:13,272 INFO L93 Difference]: Finished difference Result 24727 states and 59450 transitions. [2021-06-12 19:25:13,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 19:25:13,273 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 [2021-06-12 19:25:13,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:25:13,306 INFO L225 Difference]: With dead ends: 24727 [2021-06-12 19:25:13,306 INFO L226 Difference]: Without dead ends: 24727 [2021-06-12 19:25:13,306 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 167.7ms TimeCoverageRelationStatistics Valid=237, Invalid=363, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:25:13,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24727 states. [2021-06-12 19:25:13,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24727 to 14806. [2021-06-12 19:25:13,540 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) [2021-06-12 19:25:13,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14806 states to 14806 states and 37523 transitions. [2021-06-12 19:25:13,563 INFO L78 Accepts]: Start accepts. Automaton has 14806 states and 37523 transitions. Word has length 59 [2021-06-12 19:25:13,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:25:13,563 INFO L482 AbstractCegarLoop]: Abstraction has 14806 states and 37523 transitions. [2021-06-12 19:25:13,563 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) [2021-06-12 19:25:13,563 INFO L276 IsEmpty]: Start isEmpty. Operand 14806 states and 37523 transitions. [2021-06-12 19:25:13,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-12 19:25:13,573 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:25:13,573 INFO L472 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:25:13,773 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1003,481 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:25:13,774 INFO L430 AbstractCegarLoop]: === Iteration 490 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:25:13,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:25:13,774 INFO L82 PathProgramCache]: Analyzing trace with hash -513736276, now seen corresponding path program 139 times [2021-06-12 19:25:13,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:25:13,774 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310290242] [2021-06-12 19:25:13,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:25:13,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:25:13,864 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 128 proven. 49 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:25:13,864 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:25:13,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310290242] [2021-06-12 19:25:13,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310290242] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:25:13,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106948402] [2021-06-12 19:25:13,864 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 [2021-06-12 19:25:13,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:25:13,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 19:25:13,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:25:13,986 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 129 proven. 49 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:25:13,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2106948402] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:25:13,986 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:25:13,986 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 14 [2021-06-12 19:25:13,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269278965] [2021-06-12 19:25:13,986 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:25:13,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:25:13,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:25:13,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:25:13,987 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) [2021-06-12 19:25:14,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:25:14,438 INFO L93 Difference]: Finished difference Result 25465 states and 61218 transitions. [2021-06-12 19:25:14,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 19:25:14,439 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 [2021-06-12 19:25:14,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:25:14,469 INFO L225 Difference]: With dead ends: 25465 [2021-06-12 19:25:14,470 INFO L226 Difference]: Without dead ends: 25465 [2021-06-12 19:25:14,470 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 210.6ms TimeCoverageRelationStatistics Valid=313, Invalid=499, Unknown=0, NotChecked=0, Total=812 [2021-06-12 19:25:14,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25465 states. [2021-06-12 19:25:14,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25465 to 14863. [2021-06-12 19:25:14,744 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) [2021-06-12 19:25:14,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14863 states to 14863 states and 37693 transitions. [2021-06-12 19:25:14,768 INFO L78 Accepts]: Start accepts. Automaton has 14863 states and 37693 transitions. Word has length 59 [2021-06-12 19:25:14,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:25:14,768 INFO L482 AbstractCegarLoop]: Abstraction has 14863 states and 37693 transitions. [2021-06-12 19:25:14,768 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) [2021-06-12 19:25:14,768 INFO L276 IsEmpty]: Start isEmpty. Operand 14863 states and 37693 transitions. [2021-06-12 19:25:14,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-12 19:25:14,778 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:25:14,778 INFO L472 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:25:14,978 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 482 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1004 [2021-06-12 19:25:14,978 INFO L430 AbstractCegarLoop]: === Iteration 491 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:25:14,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:25:14,979 INFO L82 PathProgramCache]: Analyzing trace with hash -1553023288, now seen corresponding path program 140 times [2021-06-12 19:25:14,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:25:14,979 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525246132] [2021-06-12 19:25:14,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:25:14,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:25:15,082 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 121 proven. 56 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:25:15,083 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:25:15,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525246132] [2021-06-12 19:25:15,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525246132] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:25:15,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379952969] [2021-06-12 19:25:15,083 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-12 19:25:15,110 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:25:15,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:25:15,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 19:25:15,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:25:15,205 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 122 proven. 56 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:25:15,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [379952969] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:25:15,205 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:25:15,205 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 15 [2021-06-12 19:25:15,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235039993] [2021-06-12 19:25:15,205 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:25:15,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:25:15,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:25:15,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:25:15,206 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) [2021-06-12 19:25:15,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:25:15,718 INFO L93 Difference]: Finished difference Result 24352 states and 58685 transitions. [2021-06-12 19:25:15,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 19:25:15,718 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 [2021-06-12 19:25:15,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:25:15,749 INFO L225 Difference]: With dead ends: 24352 [2021-06-12 19:25:15,749 INFO L226 Difference]: Without dead ends: 24352 [2021-06-12 19:25:15,749 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 240.5ms TimeCoverageRelationStatistics Valid=355, Invalid=575, Unknown=0, NotChecked=0, Total=930 [2021-06-12 19:25:15,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24352 states. [2021-06-12 19:25:15,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24352 to 14909. [2021-06-12 19:25:15,997 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) [2021-06-12 19:25:16,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14909 states to 14909 states and 37832 transitions. [2021-06-12 19:25:16,022 INFO L78 Accepts]: Start accepts. Automaton has 14909 states and 37832 transitions. Word has length 59 [2021-06-12 19:25:16,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:25:16,022 INFO L482 AbstractCegarLoop]: Abstraction has 14909 states and 37832 transitions. [2021-06-12 19:25:16,022 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) [2021-06-12 19:25:16,022 INFO L276 IsEmpty]: Start isEmpty. Operand 14909 states and 37832 transitions. [2021-06-12 19:25:16,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-12 19:25:16,032 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:25:16,032 INFO L472 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:25:16,232 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1005,483 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:25:16,232 INFO L430 AbstractCegarLoop]: === Iteration 492 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:25:16,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:25:16,232 INFO L82 PathProgramCache]: Analyzing trace with hash -533160916, now seen corresponding path program 141 times [2021-06-12 19:25:16,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:25:16,233 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478766804] [2021-06-12 19:25:16,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:25:16,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:25:16,345 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 114 proven. 63 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:25:16,345 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:25:16,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478766804] [2021-06-12 19:25:16,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478766804] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:25:16,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532456836] [2021-06-12 19:25:16,345 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 [2021-06-12 19:25:16,379 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-06-12 19:25:16,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:25:16,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:25:16,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:25:16,538 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 144 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:25:16,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [532456836] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:25:16,539 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:25:16,539 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 21 [2021-06-12 19:25:16,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291491633] [2021-06-12 19:25:16,539 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 19:25:16,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:25:16,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 19:25:16,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=308, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:25:16,539 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) [2021-06-12 19:25:16,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:25:16,997 INFO L93 Difference]: Finished difference Result 17503 states and 42817 transitions. [2021-06-12 19:25:16,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 19:25:16,998 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 [2021-06-12 19:25:16,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:25:17,018 INFO L225 Difference]: With dead ends: 17503 [2021-06-12 19:25:17,018 INFO L226 Difference]: Without dead ends: 17503 [2021-06-12 19:25:17,018 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 239.9ms TimeCoverageRelationStatistics Valid=266, Invalid=490, Unknown=0, NotChecked=0, Total=756 [2021-06-12 19:25:17,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17503 states. [2021-06-12 19:25:17,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17503 to 14273. [2021-06-12 19:25:17,202 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) [2021-06-12 19:25:17,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14273 states to 14273 states and 36110 transitions. [2021-06-12 19:25:17,225 INFO L78 Accepts]: Start accepts. Automaton has 14273 states and 36110 transitions. Word has length 59 [2021-06-12 19:25:17,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:25:17,225 INFO L482 AbstractCegarLoop]: Abstraction has 14273 states and 36110 transitions. [2021-06-12 19:25:17,225 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) [2021-06-12 19:25:17,225 INFO L276 IsEmpty]: Start isEmpty. Operand 14273 states and 36110 transitions. [2021-06-12 19:25:17,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-12 19:25:17,235 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:25:17,235 INFO L472 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:25:17,435 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 484 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1006 [2021-06-12 19:25:17,435 INFO L430 AbstractCegarLoop]: === Iteration 493 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:25:17,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:25:17,436 INFO L82 PathProgramCache]: Analyzing trace with hash -539355172, now seen corresponding path program 293 times [2021-06-12 19:25:17,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:25:17,436 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247409214] [2021-06-12 19:25:17,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:25:17,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:25:17,628 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 65 proven. 113 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:25:17,629 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:25:17,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247409214] [2021-06-12 19:25:17,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247409214] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:25:17,629 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035885990] [2021-06-12 19:25:17,629 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 [2021-06-12 19:25:17,658 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-06-12 19:25:17,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:25:17,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 19:25:17,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:25:17,771 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 65 proven. 113 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:25:17,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035885990] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:25:17,771 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:25:17,771 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 19 [2021-06-12 19:25:17,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721593359] [2021-06-12 19:25:17,771 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 19:25:17,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:25:17,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 19:25:17,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:25:17,771 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) [2021-06-12 19:25:18,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:25:18,141 INFO L93 Difference]: Finished difference Result 16871 states and 40798 transitions. [2021-06-12 19:25:18,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 19:25:18,141 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 [2021-06-12 19:25:18,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:25:18,159 INFO L225 Difference]: With dead ends: 16871 [2021-06-12 19:25:18,159 INFO L226 Difference]: Without dead ends: 16817 [2021-06-12 19:25:18,160 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 203.6ms TimeCoverageRelationStatistics Valid=188, Invalid=514, Unknown=0, NotChecked=0, Total=702 [2021-06-12 19:25:18,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16817 states. [2021-06-12 19:25:18,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16817 to 14273. [2021-06-12 19:25:18,337 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) [2021-06-12 19:25:18,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14273 states to 14273 states and 36095 transitions. [2021-06-12 19:25:18,363 INFO L78 Accepts]: Start accepts. Automaton has 14273 states and 36095 transitions. Word has length 59 [2021-06-12 19:25:18,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:25:18,363 INFO L482 AbstractCegarLoop]: Abstraction has 14273 states and 36095 transitions. [2021-06-12 19:25:18,364 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) [2021-06-12 19:25:18,364 INFO L276 IsEmpty]: Start isEmpty. Operand 14273 states and 36095 transitions. [2021-06-12 19:25:18,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-12 19:25:18,374 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:25:18,374 INFO L472 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:25:18,574 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1009,485 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:25:18,575 INFO L430 AbstractCegarLoop]: === Iteration 494 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:25:18,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:25:18,575 INFO L82 PathProgramCache]: Analyzing trace with hash -1196579045, now seen corresponding path program 142 times [2021-06-12 19:25:18,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:25:18,575 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095454458] [2021-06-12 19:25:18,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:25:18,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:25:18,683 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 9 proven. 165 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:25:18,683 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:25:18,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095454458] [2021-06-12 19:25:18,683 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095454458] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:25:18,683 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115345975] [2021-06-12 19:25:18,683 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 [2021-06-12 19:25:18,711 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:25:18,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:25:18,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 19:25:18,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:25:18,797 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 8 proven. 166 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:25:18,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [115345975] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:25:18,797 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:25:18,797 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-12 19:25:18,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200614223] [2021-06-12 19:25:18,797 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 19:25:18,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:25:18,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 19:25:18,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:25:18,798 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) [2021-06-12 19:25:19,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:25:19,338 INFO L93 Difference]: Finished difference Result 15978 states and 39441 transitions. [2021-06-12 19:25:19,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 19:25:19,338 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 [2021-06-12 19:25:19,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:25:19,358 INFO L225 Difference]: With dead ends: 15978 [2021-06-12 19:25:19,358 INFO L226 Difference]: Without dead ends: 15963 [2021-06-12 19:25:19,359 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 158.5ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:25:19,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15963 states. [2021-06-12 19:25:19,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15963 to 14540. [2021-06-12 19:25:19,544 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) [2021-06-12 19:25:19,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14540 states to 14540 states and 36724 transitions. [2021-06-12 19:25:19,568 INFO L78 Accepts]: Start accepts. Automaton has 14540 states and 36724 transitions. Word has length 59 [2021-06-12 19:25:19,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:25:19,568 INFO L482 AbstractCegarLoop]: Abstraction has 14540 states and 36724 transitions. [2021-06-12 19:25:19,568 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) [2021-06-12 19:25:19,568 INFO L276 IsEmpty]: Start isEmpty. Operand 14540 states and 36724 transitions. [2021-06-12 19:25:19,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-12 19:25:19,577 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:25:19,577 INFO L472 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:25:19,777 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 486 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1017 [2021-06-12 19:25:19,778 INFO L430 AbstractCegarLoop]: === Iteration 495 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:25:19,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:25:19,778 INFO L82 PathProgramCache]: Analyzing trace with hash 1751753960, now seen corresponding path program 294 times [2021-06-12 19:25:19,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:25:19,778 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238375283] [2021-06-12 19:25:19,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:25:19,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:25:19,849 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 69 proven. 105 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-12 19:25:19,849 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:25:19,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238375283] [2021-06-12 19:25:19,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238375283] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:25:19,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430226861] [2021-06-12 19:25:19,849 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 [2021-06-12 19:25:19,881 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-06-12 19:25:19,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:25:19,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 19:25:19,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:25:19,966 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 69 proven. 105 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-12 19:25:19,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [430226861] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:25:19,967 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:25:19,967 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-12 19:25:19,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064771030] [2021-06-12 19:25:19,967 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 19:25:19,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:25:19,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 19:25:19,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:25:19,967 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) [2021-06-12 19:25:20,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:25:20,166 INFO L93 Difference]: Finished difference Result 17442 states and 41946 transitions. [2021-06-12 19:25:20,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:25:20,167 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 [2021-06-12 19:25:20,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:25:20,188 INFO L225 Difference]: With dead ends: 17442 [2021-06-12 19:25:20,188 INFO L226 Difference]: Without dead ends: 17424 [2021-06-12 19:25:20,188 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 80.9ms TimeCoverageRelationStatistics Valid=86, Invalid=124, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:25:20,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17424 states. [2021-06-12 19:25:20,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17424 to 14540. [2021-06-12 19:25:20,412 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) [2021-06-12 19:25:20,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14540 states to 14540 states and 36706 transitions. [2021-06-12 19:25:20,436 INFO L78 Accepts]: Start accepts. Automaton has 14540 states and 36706 transitions. Word has length 59 [2021-06-12 19:25:20,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:25:20,436 INFO L482 AbstractCegarLoop]: Abstraction has 14540 states and 36706 transitions. [2021-06-12 19:25:20,436 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) [2021-06-12 19:25:20,436 INFO L276 IsEmpty]: Start isEmpty. Operand 14540 states and 36706 transitions. [2021-06-12 19:25:20,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-12 19:25:20,445 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:25:20,446 INFO L472 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:25:20,646 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1018,487 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:25:20,646 INFO L430 AbstractCegarLoop]: === Iteration 496 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:25:20,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:25:20,646 INFO L82 PathProgramCache]: Analyzing trace with hash 303753947, now seen corresponding path program 295 times [2021-06-12 19:25:20,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:25:20,646 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095543192] [2021-06-12 19:25:20,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:25:20,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:25:20,735 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 20 proven. 154 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:25:20,735 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:25:20,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095543192] [2021-06-12 19:25:20,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095543192] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:25:20,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355331331] [2021-06-12 19:25:20,735 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 [2021-06-12 19:25:20,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:25:20,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 19:25:20,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:25:20,860 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 15 proven. 159 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:25:20,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [355331331] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:25:20,860 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:25:20,861 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-12 19:25:20,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121386926] [2021-06-12 19:25:20,861 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 19:25:20,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:25:20,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 19:25:20,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:25:20,861 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) [2021-06-12 19:25:21,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:25:21,631 INFO L93 Difference]: Finished difference Result 15609 states and 38572 transitions. [2021-06-12 19:25:21,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 19:25:21,632 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 [2021-06-12 19:25:21,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:25:21,652 INFO L225 Difference]: With dead ends: 15609 [2021-06-12 19:25:21,652 INFO L226 Difference]: Without dead ends: 15481 [2021-06-12 19:25:21,652 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 150.1ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:25:21,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15481 states. [2021-06-12 19:25:21,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15481 to 14586. [2021-06-12 19:25:21,837 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) [2021-06-12 19:25:21,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14586 states to 14586 states and 36688 transitions. [2021-06-12 19:25:21,861 INFO L78 Accepts]: Start accepts. Automaton has 14586 states and 36688 transitions. Word has length 59 [2021-06-12 19:25:21,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:25:21,861 INFO L482 AbstractCegarLoop]: Abstraction has 14586 states and 36688 transitions. [2021-06-12 19:25:21,861 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) [2021-06-12 19:25:21,861 INFO L276 IsEmpty]: Start isEmpty. Operand 14586 states and 36688 transitions. [2021-06-12 19:25:21,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-12 19:25:21,872 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:25:21,872 INFO L472 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:25:22,072 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1021,488 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:25:22,072 INFO L430 AbstractCegarLoop]: === Iteration 497 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:25:22,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:25:22,073 INFO L82 PathProgramCache]: Analyzing trace with hash -309782233, now seen corresponding path program 296 times [2021-06-12 19:25:22,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:25:22,073 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379010317] [2021-06-12 19:25:22,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:25:22,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:25:22,165 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 155 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-12 19:25:22,165 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:25:22,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379010317] [2021-06-12 19:25:22,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379010317] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:25:22,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732471236] [2021-06-12 19:25:22,166 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 [2021-06-12 19:25:22,194 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:25:22,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:25:22,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 19:25:22,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:25:22,280 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 156 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-12 19:25:22,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1732471236] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:25:22,281 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:25:22,281 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-12 19:25:22,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731529215] [2021-06-12 19:25:22,281 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 19:25:22,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:25:22,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 19:25:22,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:25:22,281 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) [2021-06-12 19:25:22,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:25:22,851 INFO L93 Difference]: Finished difference Result 16298 states and 40065 transitions. [2021-06-12 19:25:22,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 19:25:22,852 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 [2021-06-12 19:25:22,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:25:22,872 INFO L225 Difference]: With dead ends: 16298 [2021-06-12 19:25:22,872 INFO L226 Difference]: Without dead ends: 16286 [2021-06-12 19:25:22,872 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 147.4ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:25:22,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16286 states. [2021-06-12 19:25:23,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16286 to 14730. [2021-06-12 19:25:23,056 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) [2021-06-12 19:25:23,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14730 states to 14730 states and 37054 transitions. [2021-06-12 19:25:23,079 INFO L78 Accepts]: Start accepts. Automaton has 14730 states and 37054 transitions. Word has length 59 [2021-06-12 19:25:23,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:25:23,080 INFO L482 AbstractCegarLoop]: Abstraction has 14730 states and 37054 transitions. [2021-06-12 19:25:23,080 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) [2021-06-12 19:25:23,080 INFO L276 IsEmpty]: Start isEmpty. Operand 14730 states and 37054 transitions. [2021-06-12 19:25:23,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-12 19:25:23,089 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:25:23,089 INFO L472 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:25:23,290 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 489 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1022 [2021-06-12 19:25:23,290 INFO L430 AbstractCegarLoop]: === Iteration 498 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:25:23,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:25:23,290 INFO L82 PathProgramCache]: Analyzing trace with hash 1832135101, now seen corresponding path program 297 times [2021-06-12 19:25:23,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:25:23,290 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632356910] [2021-06-12 19:25:23,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:25:23,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:25:23,395 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 157 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:25:23,395 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:25:23,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632356910] [2021-06-12 19:25:23,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632356910] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:25:23,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043945258] [2021-06-12 19:25:23,395 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 [2021-06-12 19:25:23,427 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-06-12 19:25:23,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:25:23,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 19:25:23,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:25:23,583 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 158 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:25:23,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1043945258] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:25:23,584 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:25:23,584 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-12 19:25:23,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598592859] [2021-06-12 19:25:23,584 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:25:23,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:25:23,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:25:23,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:25:23,584 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) [2021-06-12 19:25:24,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:25:24,385 INFO L93 Difference]: Finished difference Result 18459 states and 44889 transitions. [2021-06-12 19:25:24,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-12 19:25:24,386 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 [2021-06-12 19:25:24,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:25:24,407 INFO L225 Difference]: With dead ends: 18459 [2021-06-12 19:25:24,407 INFO L226 Difference]: Without dead ends: 18405 [2021-06-12 19:25:24,408 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 284.1ms TimeCoverageRelationStatistics Valid=129, Invalid=927, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 19:25:24,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18405 states. [2021-06-12 19:25:24,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18405 to 15161. [2021-06-12 19:25:24,619 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) [2021-06-12 19:25:24,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15161 states to 15161 states and 38226 transitions. [2021-06-12 19:25:24,645 INFO L78 Accepts]: Start accepts. Automaton has 15161 states and 38226 transitions. Word has length 59 [2021-06-12 19:25:24,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:25:24,645 INFO L482 AbstractCegarLoop]: Abstraction has 15161 states and 38226 transitions. [2021-06-12 19:25:24,645 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) [2021-06-12 19:25:24,645 INFO L276 IsEmpty]: Start isEmpty. Operand 15161 states and 38226 transitions. [2021-06-12 19:25:24,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-12 19:25:24,656 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:25:24,656 INFO L472 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:25:24,856 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 490 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1023 [2021-06-12 19:25:24,856 INFO L430 AbstractCegarLoop]: === Iteration 499 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:25:24,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:25:24,856 INFO L82 PathProgramCache]: Analyzing trace with hash -930273086, now seen corresponding path program 298 times [2021-06-12 19:25:24,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:25:24,856 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141478372] [2021-06-12 19:25:24,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:25:24,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:25:24,936 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 55 proven. 122 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:25:24,937 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:25:24,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141478372] [2021-06-12 19:25:24,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141478372] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:25:24,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029818494] [2021-06-12 19:25:24,937 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 [2021-06-12 19:25:24,964 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:25:24,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:25:24,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 19:25:24,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:25:25,050 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 55 proven. 122 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:25:25,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2029818494] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:25:25,050 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:25:25,050 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-06-12 19:25:25,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676552179] [2021-06-12 19:25:25,050 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:25:25,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:25:25,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:25:25,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:25:25,051 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) [2021-06-12 19:25:25,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:25:25,256 INFO L93 Difference]: Finished difference Result 18207 states and 43712 transitions. [2021-06-12 19:25:25,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:25:25,257 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 [2021-06-12 19:25:25,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:25:25,279 INFO L225 Difference]: With dead ends: 18207 [2021-06-12 19:25:25,279 INFO L226 Difference]: Without dead ends: 18183 [2021-06-12 19:25:25,279 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 91.0ms TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:25:25,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18183 states. [2021-06-12 19:25:25,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18183 to 15161. [2021-06-12 19:25:25,480 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) [2021-06-12 19:25:25,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15161 states to 15161 states and 38212 transitions. [2021-06-12 19:25:25,504 INFO L78 Accepts]: Start accepts. Automaton has 15161 states and 38212 transitions. Word has length 59 [2021-06-12 19:25:25,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:25:25,504 INFO L482 AbstractCegarLoop]: Abstraction has 15161 states and 38212 transitions. [2021-06-12 19:25:25,504 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) [2021-06-12 19:25:25,504 INFO L276 IsEmpty]: Start isEmpty. Operand 15161 states and 38212 transitions. [2021-06-12 19:25:25,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-12 19:25:25,514 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:25:25,514 INFO L472 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:25:25,714 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1024,491 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:25:25,714 INFO L430 AbstractCegarLoop]: === Iteration 500 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:25:25,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:25:25,714 INFO L82 PathProgramCache]: Analyzing trace with hash 1986971635, now seen corresponding path program 299 times [2021-06-12 19:25:25,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:25:25,715 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639087379] [2021-06-12 19:25:25,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:25:25,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:25:25,819 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 157 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:25:25,819 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:25:25,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639087379] [2021-06-12 19:25:25,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639087379] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:25:25,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976067260] [2021-06-12 19:25:25,819 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 [2021-06-12 19:25:25,852 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-06-12 19:25:25,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:25:25,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 19:25:25,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:25:25,937 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 158 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:25:25,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976067260] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:25:25,938 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:25:25,938 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-12 19:25:25,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239326969] [2021-06-12 19:25:25,938 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:25:25,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:25:25,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:25:25,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:25:25,938 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) [2021-06-12 19:25:27,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:25:27,206 INFO L93 Difference]: Finished difference Result 23302 states and 55848 transitions. [2021-06-12 19:25:27,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-12 19:25:27,206 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 [2021-06-12 19:25:27,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:25:27,233 INFO L225 Difference]: With dead ends: 23302 [2021-06-12 19:25:27,233 INFO L226 Difference]: Without dead ends: 23134 [2021-06-12 19:25:27,233 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 945 ImplicationChecksByTransitivity, 586.3ms TimeCoverageRelationStatistics Valid=327, Invalid=2865, Unknown=0, NotChecked=0, Total=3192 [2021-06-12 19:25:27,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23134 states. [2021-06-12 19:25:27,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23134 to 16060. [2021-06-12 19:25:27,477 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) [2021-06-12 19:25:27,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16060 states to 16060 states and 40577 transitions. [2021-06-12 19:25:27,504 INFO L78 Accepts]: Start accepts. Automaton has 16060 states and 40577 transitions. Word has length 59 [2021-06-12 19:25:27,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:25:27,504 INFO L482 AbstractCegarLoop]: Abstraction has 16060 states and 40577 transitions. [2021-06-12 19:25:27,504 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) [2021-06-12 19:25:27,504 INFO L276 IsEmpty]: Start isEmpty. Operand 16060 states and 40577 transitions. [2021-06-12 19:25:27,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-12 19:25:27,514 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:25:27,514 INFO L472 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:25:27,714 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 492 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1028 [2021-06-12 19:25:27,714 INFO L430 AbstractCegarLoop]: === Iteration 501 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:25:27,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:25:27,715 INFO L82 PathProgramCache]: Analyzing trace with hash -1921392984, now seen corresponding path program 300 times [2021-06-12 19:25:27,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:25:27,715 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99299647] [2021-06-12 19:25:27,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:25:27,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:25:27,803 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 47 proven. 130 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:25:27,803 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:25:27,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99299647] [2021-06-12 19:25:27,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99299647] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:25:27,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275470145] [2021-06-12 19:25:27,804 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 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 [2021-06-12 19:25:27,836 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-06-12 19:25:27,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:25:27,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 19:25:27,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:25:27,922 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 47 proven. 130 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:25:27,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [275470145] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:25:27,922 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:25:27,922 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-06-12 19:25:27,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849466561] [2021-06-12 19:25:27,922 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:25:27,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:25:27,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:25:27,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:25:27,923 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) [2021-06-12 19:25:28,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:25:28,175 INFO L93 Difference]: Finished difference Result 19290 states and 46411 transitions. [2021-06-12 19:25:28,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:25:28,175 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 [2021-06-12 19:25:28,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:25:28,198 INFO L225 Difference]: With dead ends: 19290 [2021-06-12 19:25:28,198 INFO L226 Difference]: Without dead ends: 19257 [2021-06-12 19:25:28,199 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 108.8ms TimeCoverageRelationStatistics Valid=108, Invalid=198, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:25:28,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19257 states. [2021-06-12 19:25:28,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19257 to 16060. [2021-06-12 19:25:28,421 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) [2021-06-12 19:25:28,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16060 states to 16060 states and 40568 transitions. [2021-06-12 19:25:28,450 INFO L78 Accepts]: Start accepts. Automaton has 16060 states and 40568 transitions. Word has length 59 [2021-06-12 19:25:28,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:25:28,450 INFO L482 AbstractCegarLoop]: Abstraction has 16060 states and 40568 transitions. [2021-06-12 19:25:28,450 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) [2021-06-12 19:25:28,450 INFO L276 IsEmpty]: Start isEmpty. Operand 16060 states and 40568 transitions. [2021-06-12 19:25:28,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-12 19:25:28,461 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:25:28,461 INFO L472 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:25:28,661 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1029,493 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:25:28,661 INFO L430 AbstractCegarLoop]: === Iteration 502 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:25:28,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:25:28,662 INFO L82 PathProgramCache]: Analyzing trace with hash 1927280125, now seen corresponding path program 301 times [2021-06-12 19:25:28,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:25:28,662 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837918864] [2021-06-12 19:25:28,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:25:28,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:25:28,804 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 157 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:25:28,804 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:25:28,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837918864] [2021-06-12 19:25:28,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837918864] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:25:28,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757566835] [2021-06-12 19:25:28,805 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 [2021-06-12 19:25:28,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:25:28,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 19:25:28,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:25:28,916 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 158 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:25:28,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [757566835] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:25:28,917 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:25:28,917 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-12 19:25:28,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610101848] [2021-06-12 19:25:28,917 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:25:28,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:25:28,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:25:28,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:25:28,917 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) [2021-06-12 19:25:30,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:25:30,972 INFO L93 Difference]: Finished difference Result 33633 states and 79425 transitions. [2021-06-12 19:25:30,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-06-12 19:25:30,972 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 [2021-06-12 19:25:30,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:25:31,014 INFO L225 Difference]: With dead ends: 33633 [2021-06-12 19:25:31,015 INFO L226 Difference]: Without dead ends: 33177 [2021-06-12 19:25:31,015 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 61 SyntacticMatches, 2 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3400 ImplicationChecksByTransitivity, 1132.3ms TimeCoverageRelationStatistics Valid=813, Invalid=8499, Unknown=0, NotChecked=0, Total=9312 [2021-06-12 19:25:31,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33177 states. [2021-06-12 19:25:31,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33177 to 17660. [2021-06-12 19:25:31,346 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) [2021-06-12 19:25:31,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17660 states to 17660 states and 44722 transitions. [2021-06-12 19:25:31,376 INFO L78 Accepts]: Start accepts. Automaton has 17660 states and 44722 transitions. Word has length 59 [2021-06-12 19:25:31,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:25:31,376 INFO L482 AbstractCegarLoop]: Abstraction has 17660 states and 44722 transitions. [2021-06-12 19:25:31,376 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) [2021-06-12 19:25:31,376 INFO L276 IsEmpty]: Start isEmpty. Operand 17660 states and 44722 transitions. [2021-06-12 19:25:31,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-12 19:25:31,387 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:25:31,387 INFO L472 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:25:31,587 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 494 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1034 [2021-06-12 19:25:31,587 INFO L430 AbstractCegarLoop]: === Iteration 503 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:25:31,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:25:31,588 INFO L82 PathProgramCache]: Analyzing trace with hash -474114302, now seen corresponding path program 302 times [2021-06-12 19:25:31,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:25:31,588 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834543131] [2021-06-12 19:25:31,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:25:31,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:25:31,688 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 45 proven. 132 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:25:31,688 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:25:31,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834543131] [2021-06-12 19:25:31,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834543131] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:25:31,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706191673] [2021-06-12 19:25:31,688 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 [2021-06-12 19:25:31,716 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:25:31,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:25:31,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 19:25:31,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:25:31,804 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 45 proven. 132 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:25:31,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [706191673] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:25:31,805 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:25:31,805 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-06-12 19:25:31,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175221120] [2021-06-12 19:25:31,805 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:25:31,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:25:31,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:25:31,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:25:31,805 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) [2021-06-12 19:25:32,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:25:32,079 INFO L93 Difference]: Finished difference Result 21199 states and 51145 transitions. [2021-06-12 19:25:32,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:25:32,080 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 [2021-06-12 19:25:32,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:25:32,105 INFO L225 Difference]: With dead ends: 21199 [2021-06-12 19:25:32,105 INFO L226 Difference]: Without dead ends: 21157 [2021-06-12 19:25:32,106 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 130.7ms TimeCoverageRelationStatistics Valid=129, Invalid=251, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:25:32,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21157 states. [2021-06-12 19:25:32,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21157 to 17660. [2021-06-12 19:25:32,426 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) [2021-06-12 19:25:32,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17660 states to 17660 states and 44713 transitions. [2021-06-12 19:25:32,457 INFO L78 Accepts]: Start accepts. Automaton has 17660 states and 44713 transitions. Word has length 59 [2021-06-12 19:25:32,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:25:32,457 INFO L482 AbstractCegarLoop]: Abstraction has 17660 states and 44713 transitions. [2021-06-12 19:25:32,457 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) [2021-06-12 19:25:32,457 INFO L276 IsEmpty]: Start isEmpty. Operand 17660 states and 44713 transitions. [2021-06-12 19:25:32,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-12 19:25:32,467 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:25:32,467 INFO L472 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:25:32,668 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 495 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1035 [2021-06-12 19:25:32,668 INFO L430 AbstractCegarLoop]: === Iteration 504 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:25:32,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:25:32,668 INFO L82 PathProgramCache]: Analyzing trace with hash 1773966259, now seen corresponding path program 303 times [2021-06-12 19:25:32,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:25:32,668 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202021296] [2021-06-12 19:25:32,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:25:32,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:25:32,795 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 157 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:25:32,795 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:25:32,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202021296] [2021-06-12 19:25:32,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202021296] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:25:32,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330599229] [2021-06-12 19:25:32,796 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 [2021-06-12 19:25:32,828 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-06-12 19:25:32,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:25:32,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 19:25:32,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:25:32,914 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 158 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:25:32,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1330599229] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:25:32,914 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:25:32,914 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-12 19:25:32,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082095309] [2021-06-12 19:25:32,914 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:25:32,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:25:32,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:25:32,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:25:32,915 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) [2021-06-12 19:25:36,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:25:36,303 INFO L93 Difference]: Finished difference Result 57125 states and 132657 transitions. [2021-06-12 19:25:36,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 161 states. [2021-06-12 19:25:36,304 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 [2021-06-12 19:25:36,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:25:36,372 INFO L225 Difference]: With dead ends: 57125 [2021-06-12 19:25:36,372 INFO L226 Difference]: Without dead ends: 55739 [2021-06-12 19:25:36,373 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 60 SyntacticMatches, 2 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10598 ImplicationChecksByTransitivity, 2226.7ms TimeCoverageRelationStatistics Valid=1947, Invalid=23813, Unknown=0, NotChecked=0, Total=25760 [2021-06-12 19:25:36,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55739 states. [2021-06-12 19:25:36,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55739 to 20191. [2021-06-12 19:25:36,846 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) [2021-06-12 19:25:36,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20191 states to 20191 states and 51242 transitions. [2021-06-12 19:25:36,883 INFO L78 Accepts]: Start accepts. Automaton has 20191 states and 51242 transitions. Word has length 59 [2021-06-12 19:25:36,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:25:36,883 INFO L482 AbstractCegarLoop]: Abstraction has 20191 states and 51242 transitions. [2021-06-12 19:25:36,883 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) [2021-06-12 19:25:36,883 INFO L276 IsEmpty]: Start isEmpty. Operand 20191 states and 51242 transitions. [2021-06-12 19:25:36,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-12 19:25:36,894 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:25:36,894 INFO L472 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:25:37,094 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1041,496 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:25:37,095 INFO L430 AbstractCegarLoop]: === Iteration 505 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:25:37,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:25:37,095 INFO L82 PathProgramCache]: Analyzing trace with hash -1771583384, now seen corresponding path program 304 times [2021-06-12 19:25:37,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:25:37,095 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465879] [2021-06-12 19:25:37,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:25:37,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:25:37,203 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 49 proven. 128 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:25:37,203 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:25:37,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465879] [2021-06-12 19:25:37,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465879] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:25:37,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542956793] [2021-06-12 19:25:37,203 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 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 [2021-06-12 19:25:37,231 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:25:37,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:25:37,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 19:25:37,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:25:37,337 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 49 proven. 128 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:25:37,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [542956793] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:25:37,337 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:25:37,337 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-06-12 19:25:37,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760282541] [2021-06-12 19:25:37,338 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:25:37,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:25:37,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:25:37,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:25:37,338 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) [2021-06-12 19:25:37,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:25:37,678 INFO L93 Difference]: Finished difference Result 24224 states and 58607 transitions. [2021-06-12 19:25:37,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 19:25:37,679 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 [2021-06-12 19:25:37,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:25:37,708 INFO L225 Difference]: With dead ends: 24224 [2021-06-12 19:25:37,708 INFO L226 Difference]: Without dead ends: 24173 [2021-06-12 19:25:37,708 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 149.2ms TimeCoverageRelationStatistics Valid=152, Invalid=310, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:25:37,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24173 states. [2021-06-12 19:25:37,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24173 to 20191. [2021-06-12 19:25:37,996 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) [2021-06-12 19:25:38,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20191 states to 20191 states and 51233 transitions. [2021-06-12 19:25:38,029 INFO L78 Accepts]: Start accepts. Automaton has 20191 states and 51233 transitions. Word has length 59 [2021-06-12 19:25:38,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:25:38,029 INFO L482 AbstractCegarLoop]: Abstraction has 20191 states and 51233 transitions. [2021-06-12 19:25:38,029 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) [2021-06-12 19:25:38,029 INFO L276 IsEmpty]: Start isEmpty. Operand 20191 states and 51233 transitions. [2021-06-12 19:25:38,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-12 19:25:38,039 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:25:38,039 INFO L472 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:25:38,239 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1042,497 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:25:38,240 INFO L430 AbstractCegarLoop]: === Iteration 506 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:25:38,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:25:38,240 INFO L82 PathProgramCache]: Analyzing trace with hash -49180099, now seen corresponding path program 305 times [2021-06-12 19:25:38,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:25:38,240 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489628720] [2021-06-12 19:25:38,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:25:38,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:25:38,378 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 157 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:25:38,379 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:25:38,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489628720] [2021-06-12 19:25:38,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489628720] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:25:38,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724455163] [2021-06-12 19:25:38,379 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 [2021-06-12 19:25:38,412 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-06-12 19:25:38,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:25:38,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 19:25:38,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:25:38,661 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2021-06-12 19:25:38,710 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 158 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:25:38,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [724455163] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:25:38,710 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:25:38,710 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-06-12 19:25:38,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685293508] [2021-06-12 19:25:38,710 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:25:38,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:25:38,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:25:38,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:25:38,711 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) [2021-06-12 19:25:44,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:25:44,088 INFO L93 Difference]: Finished difference Result 72936 states and 170877 transitions. [2021-06-12 19:25:44,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 257 states. [2021-06-12 19:25:44,089 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 [2021-06-12 19:25:44,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:25:44,206 INFO L225 Difference]: With dead ends: 72936 [2021-06-12 19:25:44,206 INFO L226 Difference]: Without dead ends: 71616 [2021-06-12 19:25:44,211 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 59 SyntacticMatches, 2 SemanticMatches, 255 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29073 ImplicationChecksByTransitivity, 4223.3ms TimeCoverageRelationStatistics Valid=4377, Invalid=61415, Unknown=0, NotChecked=0, Total=65792 [2021-06-12 19:25:44,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71616 states. [2021-06-12 19:25:44,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71616 to 22239. [2021-06-12 19:25:44,837 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) [2021-06-12 19:25:44,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22239 states to 22239 states and 56457 transitions. [2021-06-12 19:25:44,877 INFO L78 Accepts]: Start accepts. Automaton has 22239 states and 56457 transitions. Word has length 59 [2021-06-12 19:25:44,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:25:44,877 INFO L482 AbstractCegarLoop]: Abstraction has 22239 states and 56457 transitions. [2021-06-12 19:25:44,877 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) [2021-06-12 19:25:44,877 INFO L276 IsEmpty]: Start isEmpty. Operand 22239 states and 56457 transitions. [2021-06-12 19:25:44,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-12 19:25:44,889 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:25:44,889 INFO L472 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:25:45,089 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1049,498 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:25:45,089 INFO L430 AbstractCegarLoop]: === Iteration 507 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:25:45,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:25:45,090 INFO L82 PathProgramCache]: Analyzing trace with hash 32658754, now seen corresponding path program 306 times [2021-06-12 19:25:45,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:25:45,090 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946462681] [2021-06-12 19:25:45,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:25:45,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:25:45,235 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 59 proven. 118 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:25:45,235 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:25:45,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946462681] [2021-06-12 19:25:45,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946462681] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:25:45,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254154966] [2021-06-12 19:25:45,235 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 [2021-06-12 19:25:45,273 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-06-12 19:25:45,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:25:45,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 19:25:45,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:25:45,379 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 59 proven. 118 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:25:45,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [254154966] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:25:45,380 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:25:45,380 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2021-06-12 19:25:45,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790119521] [2021-06-12 19:25:45,380 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:25:45,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:25:45,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:25:45,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:25:45,380 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) [2021-06-12 19:25:45,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:25:45,734 INFO L93 Difference]: Finished difference Result 26451 states and 64189 transitions. [2021-06-12 19:25:45,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:25:45,734 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 [2021-06-12 19:25:45,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:25:45,767 INFO L225 Difference]: With dead ends: 26451 [2021-06-12 19:25:45,767 INFO L226 Difference]: Without dead ends: 26391 [2021-06-12 19:25:45,767 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 194.4ms TimeCoverageRelationStatistics Valid=177, Invalid=375, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:25:45,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26391 states. [2021-06-12 19:25:46,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26391 to 21958. [2021-06-12 19:25:46,062 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) [2021-06-12 19:25:46,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21958 states to 21958 states and 55705 transitions. [2021-06-12 19:25:46,100 INFO L78 Accepts]: Start accepts. Automaton has 21958 states and 55705 transitions. Word has length 59 [2021-06-12 19:25:46,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:25:46,100 INFO L482 AbstractCegarLoop]: Abstraction has 21958 states and 55705 transitions. [2021-06-12 19:25:46,100 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) [2021-06-12 19:25:46,100 INFO L276 IsEmpty]: Start isEmpty. Operand 21958 states and 55705 transitions. [2021-06-12 19:25:46,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-12 19:25:46,112 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:25:46,112 INFO L472 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:25:46,312 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1050,499 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:25:46,312 INFO L430 AbstractCegarLoop]: === Iteration 508 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:25:46,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:25:46,312 INFO L82 PathProgramCache]: Analyzing trace with hash 754093939, now seen corresponding path program 307 times [2021-06-12 19:25:46,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:25:46,312 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954734107] [2021-06-12 19:25:46,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:25:46,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:25:46,824 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 160 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:25:46,824 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:25:46,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954734107] [2021-06-12 19:25:46,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954734107] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:25:46,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984992736] [2021-06-12 19:25:46,824 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 [2021-06-12 19:25:46,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:25:46,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 19:25:46,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:25:46,946 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 160 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:25:46,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1984992736] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:25:46,946 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:25:46,946 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 17 [2021-06-12 19:25:46,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766655738] [2021-06-12 19:25:46,946 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:25:46,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:25:46,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:25:46,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=271, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:25:46,946 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) [2021-06-12 19:25:47,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:25:47,941 INFO L93 Difference]: Finished difference Result 30778 states and 73104 transitions. [2021-06-12 19:25:47,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 19:25:47,942 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 [2021-06-12 19:25:47,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:25:47,980 INFO L225 Difference]: With dead ends: 30778 [2021-06-12 19:25:47,980 INFO L226 Difference]: Without dead ends: 28996 [2021-06-12 19:25:47,981 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 58 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 798.4ms TimeCoverageRelationStatistics Valid=224, Invalid=1182, Unknown=0, NotChecked=0, Total=1406 [2021-06-12 19:25:48,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28996 states. [2021-06-12 19:25:48,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28996 to 14128. [2021-06-12 19:25:48,303 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) [2021-06-12 19:25:48,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14128 states to 14128 states and 35351 transitions. [2021-06-12 19:25:48,331 INFO L78 Accepts]: Start accepts. Automaton has 14128 states and 35351 transitions. Word has length 59 [2021-06-12 19:25:48,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:25:48,331 INFO L482 AbstractCegarLoop]: Abstraction has 14128 states and 35351 transitions. [2021-06-12 19:25:48,331 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) [2021-06-12 19:25:48,331 INFO L276 IsEmpty]: Start isEmpty. Operand 14128 states and 35351 transitions. [2021-06-12 19:25:48,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-12 19:25:48,342 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:25:48,343 INFO L472 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:25:48,553 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 500 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1058 [2021-06-12 19:25:48,553 INFO L430 AbstractCegarLoop]: === Iteration 509 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:25:48,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:25:48,553 INFO L82 PathProgramCache]: Analyzing trace with hash 516032422, now seen corresponding path program 143 times [2021-06-12 19:25:48,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:25:48,553 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029357469] [2021-06-12 19:25:48,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:25:48,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:25:48,625 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 128 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:25:48,625 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:25:48,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029357469] [2021-06-12 19:25:48,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029357469] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:25:48,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796329157] [2021-06-12 19:25:48,625 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 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 [2021-06-12 19:25:48,659 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-06-12 19:25:48,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:25:48,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 19:25:48,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:25:48,799 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 128 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:25:48,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1796329157] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:25:48,799 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:25:48,799 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17] total 20 [2021-06-12 19:25:48,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38627160] [2021-06-12 19:25:48,812 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 19:25:48,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:25:48,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 19:25:48,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=264, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:25:48,813 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) [2021-06-12 19:25:49,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:25:49,202 INFO L93 Difference]: Finished difference Result 16812 states and 41038 transitions. [2021-06-12 19:25:49,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 19:25:49,203 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 [2021-06-12 19:25:49,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:25:49,222 INFO L225 Difference]: With dead ends: 16812 [2021-06-12 19:25:49,222 INFO L226 Difference]: Without dead ends: 16798 [2021-06-12 19:25:49,223 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 130.2ms TimeCoverageRelationStatistics Valid=177, Invalid=329, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:25:49,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16798 states. [2021-06-12 19:25:49,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16798 to 14566. [2021-06-12 19:25:49,465 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) [2021-06-12 19:25:49,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14566 states to 14566 states and 36487 transitions. [2021-06-12 19:25:49,490 INFO L78 Accepts]: Start accepts. Automaton has 14566 states and 36487 transitions. Word has length 59 [2021-06-12 19:25:49,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:25:49,490 INFO L482 AbstractCegarLoop]: Abstraction has 14566 states and 36487 transitions. [2021-06-12 19:25:49,490 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) [2021-06-12 19:25:49,490 INFO L276 IsEmpty]: Start isEmpty. Operand 14566 states and 36487 transitions. [2021-06-12 19:25:49,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-12 19:25:49,500 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:25:49,500 INFO L472 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:25:49,700 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 501 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1059 [2021-06-12 19:25:49,701 INFO L430 AbstractCegarLoop]: === Iteration 510 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:25:49,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:25:49,701 INFO L82 PathProgramCache]: Analyzing trace with hash -105847988, now seen corresponding path program 144 times [2021-06-12 19:25:49,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:25:49,701 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803798121] [2021-06-12 19:25:49,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:25:49,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:25:49,774 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 128 proven. 49 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:25:49,774 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:25:49,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803798121] [2021-06-12 19:25:49,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803798121] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:25:49,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629621029] [2021-06-12 19:25:49,774 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 [2021-06-12 19:25:49,807 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2021-06-12 19:25:49,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:25:49,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 19:25:49,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:25:49,898 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 129 proven. 49 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:25:49,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [629621029] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:25:49,899 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:25:49,899 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 12 [2021-06-12 19:25:49,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656551440] [2021-06-12 19:25:49,899 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:25:49,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:25:49,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:25:49,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=89, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:25:49,899 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) [2021-06-12 19:25:50,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:25:50,189 INFO L93 Difference]: Finished difference Result 19427 states and 46843 transitions. [2021-06-12 19:25:50,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 19:25:50,190 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 [2021-06-12 19:25:50,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:25:50,213 INFO L225 Difference]: With dead ends: 19427 [2021-06-12 19:25:50,213 INFO L226 Difference]: Without dead ends: 19427 [2021-06-12 19:25:50,214 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 123.5ms TimeCoverageRelationStatistics Valid=158, Invalid=222, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:25:50,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19427 states. [2021-06-12 19:25:50,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19427 to 14571. [2021-06-12 19:25:50,474 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) [2021-06-12 19:25:50,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14571 states to 14571 states and 36502 transitions. [2021-06-12 19:25:50,498 INFO L78 Accepts]: Start accepts. Automaton has 14571 states and 36502 transitions. Word has length 59 [2021-06-12 19:25:50,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:25:50,499 INFO L482 AbstractCegarLoop]: Abstraction has 14571 states and 36502 transitions. [2021-06-12 19:25:50,499 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) [2021-06-12 19:25:50,499 INFO L276 IsEmpty]: Start isEmpty. Operand 14571 states and 36502 transitions. [2021-06-12 19:25:50,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-12 19:25:50,508 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:25:50,508 INFO L472 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:25:50,709 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 502 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1061 [2021-06-12 19:25:50,709 INFO L430 AbstractCegarLoop]: === Iteration 511 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:25:50,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:25:50,709 INFO L82 PathProgramCache]: Analyzing trace with hash -1743420444, now seen corresponding path program 145 times [2021-06-12 19:25:50,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:25:50,709 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596460637] [2021-06-12 19:25:50,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:25:50,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:25:50,791 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 128 proven. 49 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:25:50,791 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:25:50,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596460637] [2021-06-12 19:25:50,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596460637] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:25:50,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534974689] [2021-06-12 19:25:50,792 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 [2021-06-12 19:25:50,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:25:50,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 19:25:50,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:25:50,911 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 129 proven. 49 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:25:50,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1534974689] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:25:50,911 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:25:50,911 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 13 [2021-06-12 19:25:50,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845036553] [2021-06-12 19:25:50,911 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:25:50,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:25:50,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:25:50,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:25:50,912 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) [2021-06-12 19:25:51,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:25:51,326 INFO L93 Difference]: Finished difference Result 21523 states and 51587 transitions. [2021-06-12 19:25:51,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 19:25:51,326 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 [2021-06-12 19:25:51,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:25:51,349 INFO L225 Difference]: With dead ends: 21523 [2021-06-12 19:25:51,350 INFO L226 Difference]: Without dead ends: 21523 [2021-06-12 19:25:51,350 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 190.1ms TimeCoverageRelationStatistics Valid=272, Invalid=430, Unknown=0, NotChecked=0, Total=702 [2021-06-12 19:25:51,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21523 states. [2021-06-12 19:25:51,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21523 to 14590. [2021-06-12 19:25:51,575 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) [2021-06-12 19:25:51,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14590 states to 14590 states and 36562 transitions. [2021-06-12 19:25:51,599 INFO L78 Accepts]: Start accepts. Automaton has 14590 states and 36562 transitions. Word has length 59 [2021-06-12 19:25:51,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:25:51,599 INFO L482 AbstractCegarLoop]: Abstraction has 14590 states and 36562 transitions. [2021-06-12 19:25:51,599 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) [2021-06-12 19:25:51,599 INFO L276 IsEmpty]: Start isEmpty. Operand 14590 states and 36562 transitions. [2021-06-12 19:25:51,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-12 19:25:51,609 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:25:51,609 INFO L472 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:25:51,809 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1062,503 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:25:51,809 INFO L430 AbstractCegarLoop]: === Iteration 512 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:25:51,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:25:51,810 INFO L82 PathProgramCache]: Analyzing trace with hash 861551688, now seen corresponding path program 146 times [2021-06-12 19:25:51,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:25:51,810 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220325518] [2021-06-12 19:25:51,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:25:51,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:25:51,904 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 124 proven. 53 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:25:51,905 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:25:51,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220325518] [2021-06-12 19:25:51,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220325518] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:25:51,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691824912] [2021-06-12 19:25:51,905 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 [2021-06-12 19:25:51,933 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:25:51,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:25:51,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 19:25:51,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:25:52,025 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 125 proven. 53 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:25:52,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1691824912] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:25:52,026 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:25:52,026 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 14 [2021-06-12 19:25:52,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998404933] [2021-06-12 19:25:52,026 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:25:52,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:25:52,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:25:52,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:25:52,026 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) [2021-06-12 19:25:52,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:25:52,563 INFO L93 Difference]: Finished difference Result 22499 states and 53828 transitions. [2021-06-12 19:25:52,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 19:25:52,564 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 [2021-06-12 19:25:52,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:25:52,592 INFO L225 Difference]: With dead ends: 22499 [2021-06-12 19:25:52,592 INFO L226 Difference]: Without dead ends: 22499 [2021-06-12 19:25:52,592 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 242.7ms TimeCoverageRelationStatistics Valid=375, Invalid=617, Unknown=0, NotChecked=0, Total=992 [2021-06-12 19:25:52,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22499 states. [2021-06-12 19:25:52,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22499 to 14615. [2021-06-12 19:25:52,811 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) [2021-06-12 19:25:52,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14615 states to 14615 states and 36640 transitions. [2021-06-12 19:25:52,834 INFO L78 Accepts]: Start accepts. Automaton has 14615 states and 36640 transitions. Word has length 59 [2021-06-12 19:25:52,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:25:52,834 INFO L482 AbstractCegarLoop]: Abstraction has 14615 states and 36640 transitions. [2021-06-12 19:25:52,834 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) [2021-06-12 19:25:52,834 INFO L276 IsEmpty]: Start isEmpty. Operand 14615 states and 36640 transitions. [2021-06-12 19:25:52,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-12 19:25:52,844 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:25:52,844 INFO L472 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:25:53,044 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1063,504 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:25:53,045 INFO L430 AbstractCegarLoop]: === Iteration 513 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:25:53,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:25:53,045 INFO L82 PathProgramCache]: Analyzing trace with hash -177735324, now seen corresponding path program 147 times [2021-06-12 19:25:53,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:25:53,045 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946981948] [2021-06-12 19:25:53,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:25:53,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:25:53,150 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 120 proven. 57 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:25:53,150 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:25:53,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946981948] [2021-06-12 19:25:53,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946981948] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:25:53,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879547061] [2021-06-12 19:25:53,151 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 [2021-06-12 19:25:53,251 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-06-12 19:25:53,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:25:53,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 19:25:53,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:25:53,345 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 121 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:25:53,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1879547061] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:25:53,345 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:25:53,345 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 15 [2021-06-12 19:25:53,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074160919] [2021-06-12 19:25:53,346 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:25:53,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:25:53,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:25:53,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:25:53,346 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) [2021-06-12 19:25:53,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:25:53,940 INFO L93 Difference]: Finished difference Result 22401 states and 53647 transitions. [2021-06-12 19:25:53,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-12 19:25:53,941 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 [2021-06-12 19:25:53,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:25:53,964 INFO L225 Difference]: With dead ends: 22401 [2021-06-12 19:25:53,965 INFO L226 Difference]: Without dead ends: 22401 [2021-06-12 19:25:53,965 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 281.1ms TimeCoverageRelationStatistics Valid=448, Invalid=742, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 19:25:53,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22401 states. [2021-06-12 19:25:54,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22401 to 14646. [2021-06-12 19:25:54,180 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) [2021-06-12 19:25:54,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14646 states to 14646 states and 36736 transitions. [2021-06-12 19:25:54,203 INFO L78 Accepts]: Start accepts. Automaton has 14646 states and 36736 transitions. Word has length 59 [2021-06-12 19:25:54,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:25:54,203 INFO L482 AbstractCegarLoop]: Abstraction has 14646 states and 36736 transitions. [2021-06-12 19:25:54,203 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) [2021-06-12 19:25:54,203 INFO L276 IsEmpty]: Start isEmpty. Operand 14646 states and 36736 transitions. [2021-06-12 19:25:54,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-12 19:25:54,212 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:25:54,212 INFO L472 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:25:54,412 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1064,505 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:25:54,413 INFO L430 AbstractCegarLoop]: === Iteration 514 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:25:54,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:25:54,413 INFO L82 PathProgramCache]: Analyzing trace with hash 842127048, now seen corresponding path program 148 times [2021-06-12 19:25:54,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:25:54,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143312815] [2021-06-12 19:25:54,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:25:54,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:25:54,530 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 116 proven. 61 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:25:54,530 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:25:54,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143312815] [2021-06-12 19:25:54,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143312815] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:25:54,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460463089] [2021-06-12 19:25:54,530 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 [2021-06-12 19:25:54,557 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:25:54,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:25:54,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 19:25:54,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:25:54,651 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 117 proven. 61 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:25:54,651 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1460463089] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:25:54,651 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:25:54,651 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 16 [2021-06-12 19:25:54,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49175328] [2021-06-12 19:25:54,651 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:25:54,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:25:54,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:25:54,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:25:54,652 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) [2021-06-12 19:25:55,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:25:55,189 INFO L93 Difference]: Finished difference Result 21283 states and 51152 transitions. [2021-06-12 19:25:55,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 19:25:55,189 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 [2021-06-12 19:25:55,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:25:55,211 INFO L225 Difference]: With dead ends: 21283 [2021-06-12 19:25:55,211 INFO L226 Difference]: Without dead ends: 21283 [2021-06-12 19:25:55,212 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 304.0ms TimeCoverageRelationStatistics Valid=473, Invalid=787, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 19:25:55,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21283 states. [2021-06-12 19:25:55,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21283 to 14683. [2021-06-12 19:25:55,474 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) [2021-06-12 19:25:55,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14683 states to 14683 states and 36850 transitions. [2021-06-12 19:25:55,499 INFO L78 Accepts]: Start accepts. Automaton has 14683 states and 36850 transitions. Word has length 59 [2021-06-12 19:25:55,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:25:55,500 INFO L482 AbstractCegarLoop]: Abstraction has 14683 states and 36850 transitions. [2021-06-12 19:25:55,500 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) [2021-06-12 19:25:55,500 INFO L276 IsEmpty]: Start isEmpty. Operand 14683 states and 36850 transitions. [2021-06-12 19:25:55,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-12 19:25:55,509 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:25:55,509 INFO L472 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:25:55,709 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1065,506 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:25:55,710 INFO L430 AbstractCegarLoop]: === Iteration 515 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:25:55,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:25:55,710 INFO L82 PathProgramCache]: Analyzing trace with hash 963399396, now seen corresponding path program 149 times [2021-06-12 19:25:55,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:25:55,710 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237633382] [2021-06-12 19:25:55,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:25:55,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:25:55,855 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 112 proven. 65 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:25:55,855 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:25:55,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237633382] [2021-06-12 19:25:55,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237633382] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:25:55,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905650219] [2021-06-12 19:25:55,855 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 [2021-06-12 19:25:55,891 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-06-12 19:25:55,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:25:55,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 19:25:55,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:25:56,065 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 113 proven. 65 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:25:56,065 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [905650219] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:25:56,065 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:25:56,066 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 25 [2021-06-12 19:25:56,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776743070] [2021-06-12 19:25:56,066 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-12 19:25:56,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:25:56,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-12 19:25:56,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=469, Unknown=0, NotChecked=0, Total=650 [2021-06-12 19:25:56,066 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) [2021-06-12 19:25:56,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:25:56,767 INFO L93 Difference]: Finished difference Result 19401 states and 46815 transitions. [2021-06-12 19:25:56,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 19:25:56,768 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 [2021-06-12 19:25:56,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:25:56,789 INFO L225 Difference]: With dead ends: 19401 [2021-06-12 19:25:56,790 INFO L226 Difference]: Without dead ends: 19401 [2021-06-12 19:25:56,790 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 408 ImplicationChecksByTransitivity, 395.1ms TimeCoverageRelationStatistics Valid=617, Invalid=1189, Unknown=0, NotChecked=0, Total=1806 [2021-06-12 19:25:56,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19401 states. [2021-06-12 19:25:56,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19401 to 14710. [2021-06-12 19:25:56,969 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) [2021-06-12 19:25:56,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14710 states to 14710 states and 36928 transitions. [2021-06-12 19:25:56,992 INFO L78 Accepts]: Start accepts. Automaton has 14710 states and 36928 transitions. Word has length 59 [2021-06-12 19:25:56,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:25:56,992 INFO L482 AbstractCegarLoop]: Abstraction has 14710 states and 36928 transitions. [2021-06-12 19:25:56,992 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) [2021-06-12 19:25:56,992 INFO L276 IsEmpty]: Start isEmpty. Operand 14710 states and 36928 transitions. [2021-06-12 19:25:57,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-12 19:25:57,001 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:25:57,001 INFO L472 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:25:57,201 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 507 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1066 [2021-06-12 19:25:57,201 INFO L430 AbstractCegarLoop]: === Iteration 516 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:25:57,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:25:57,202 INFO L82 PathProgramCache]: Analyzing trace with hash 1720422728, now seen corresponding path program 150 times [2021-06-12 19:25:57,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:25:57,202 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95439375] [2021-06-12 19:25:57,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:25:57,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:25:57,352 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 108 proven. 70 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:25:57,352 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:25:57,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95439375] [2021-06-12 19:25:57,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95439375] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:25:57,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429643144] [2021-06-12 19:25:57,352 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 [2021-06-12 19:25:57,385 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2021-06-12 19:25:57,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:25:57,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 19:25:57,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:25:57,481 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 109 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:25:57,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [429643144] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:25:57,482 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:25:57,482 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 18 [2021-06-12 19:25:57,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306504947] [2021-06-12 19:25:57,482 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:25:57,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:25:57,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:25:57,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:25:57,482 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) [2021-06-12 19:25:57,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:25:57,975 INFO L93 Difference]: Finished difference Result 16916 states and 41381 transitions. [2021-06-12 19:25:57,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 19:25:57,976 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 [2021-06-12 19:25:57,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:25:57,995 INFO L225 Difference]: With dead ends: 16916 [2021-06-12 19:25:57,995 INFO L226 Difference]: Without dead ends: 16916 [2021-06-12 19:25:57,995 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 284.7ms TimeCoverageRelationStatistics Valid=347, Invalid=645, Unknown=0, NotChecked=0, Total=992 [2021-06-12 19:25:58,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16916 states. [2021-06-12 19:25:58,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16916 to 13840. [2021-06-12 19:25:58,217 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) [2021-06-12 19:25:58,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13840 states to 13840 states and 34624 transitions. [2021-06-12 19:25:58,240 INFO L78 Accepts]: Start accepts. Automaton has 13840 states and 34624 transitions. Word has length 59 [2021-06-12 19:25:58,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:25:58,240 INFO L482 AbstractCegarLoop]: Abstraction has 13840 states and 34624 transitions. [2021-06-12 19:25:58,240 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) [2021-06-12 19:25:58,240 INFO L276 IsEmpty]: Start isEmpty. Operand 13840 states and 34624 transitions. [2021-06-12 19:25:58,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-12 19:25:58,249 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:25:58,249 INFO L472 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:25:58,449 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1067,508 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:25:58,449 INFO L430 AbstractCegarLoop]: === Iteration 517 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:25:58,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:25:58,450 INFO L82 PathProgramCache]: Analyzing trace with hash -1305517528, now seen corresponding path program 308 times [2021-06-12 19:25:58,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:25:58,450 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351977939] [2021-06-12 19:25:58,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:25:58,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:25:58,584 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 76 proven. 102 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:25:58,585 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:25:58,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351977939] [2021-06-12 19:25:58,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351977939] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:25:58,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253592812] [2021-06-12 19:25:58,585 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 [2021-06-12 19:25:58,612 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:25:58,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:25:58,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 19:25:58,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:25:58,702 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 76 proven. 102 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:25:58,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [253592812] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:25:58,703 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:25:58,703 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2021-06-12 19:25:58,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53716295] [2021-06-12 19:25:58,703 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:25:58,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:25:58,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:25:58,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:25:58,703 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) [2021-06-12 19:25:59,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:25:59,016 INFO L93 Difference]: Finished difference Result 16377 states and 39177 transitions. [2021-06-12 19:25:59,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 19:25:59,016 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 [2021-06-12 19:25:59,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:25:59,035 INFO L225 Difference]: With dead ends: 16377 [2021-06-12 19:25:59,035 INFO L226 Difference]: Without dead ends: 16314 [2021-06-12 19:25:59,035 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 200.4ms TimeCoverageRelationStatistics Valid=204, Invalid=446, Unknown=0, NotChecked=0, Total=650 [2021-06-12 19:25:59,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16314 states. [2021-06-12 19:25:59,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16314 to 13849. [2021-06-12 19:25:59,208 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) [2021-06-12 19:25:59,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13849 states to 13849 states and 34633 transitions. [2021-06-12 19:25:59,227 INFO L78 Accepts]: Start accepts. Automaton has 13849 states and 34633 transitions. Word has length 59 [2021-06-12 19:25:59,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:25:59,227 INFO L482 AbstractCegarLoop]: Abstraction has 13849 states and 34633 transitions. [2021-06-12 19:25:59,228 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) [2021-06-12 19:25:59,228 INFO L276 IsEmpty]: Start isEmpty. Operand 13849 states and 34633 transitions. [2021-06-12 19:25:59,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-12 19:25:59,236 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:25:59,236 INFO L472 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:25:59,436 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 509 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1068 [2021-06-12 19:25:59,436 INFO L430 AbstractCegarLoop]: === Iteration 518 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:25:59,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:25:59,436 INFO L82 PathProgramCache]: Analyzing trace with hash -290755390, now seen corresponding path program 309 times [2021-06-12 19:25:59,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:25:59,436 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592090148] [2021-06-12 19:25:59,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:25:59,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:25:59,579 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 90 proven. 87 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:25:59,580 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:25:59,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592090148] [2021-06-12 19:25:59,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592090148] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:25:59,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640992439] [2021-06-12 19:25:59,580 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 [2021-06-12 19:25:59,611 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-06-12 19:25:59,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:25:59,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 19:25:59,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:25:59,704 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 90 proven. 87 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:25:59,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1640992439] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:25:59,704 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:25:59,704 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2021-06-12 19:25:59,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842618516] [2021-06-12 19:25:59,704 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:25:59,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:25:59,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:25:59,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:25:59,705 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) [2021-06-12 19:26:00,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:26:00,248 INFO L93 Difference]: Finished difference Result 16221 states and 39411 transitions. [2021-06-12 19:26:00,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 19:26:00,249 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 [2021-06-12 19:26:00,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:26:00,267 INFO L225 Difference]: With dead ends: 16221 [2021-06-12 19:26:00,267 INFO L226 Difference]: Without dead ends: 16221 [2021-06-12 19:26:00,267 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 273.3ms TimeCoverageRelationStatistics Valid=324, Invalid=606, Unknown=0, NotChecked=0, Total=930 [2021-06-12 19:26:00,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16221 states. [2021-06-12 19:26:00,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16221 to 13663. [2021-06-12 19:26:00,434 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) [2021-06-12 19:26:00,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13663 states to 13663 states and 34243 transitions. [2021-06-12 19:26:00,455 INFO L78 Accepts]: Start accepts. Automaton has 13663 states and 34243 transitions. Word has length 59 [2021-06-12 19:26:00,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:26:00,455 INFO L482 AbstractCegarLoop]: Abstraction has 13663 states and 34243 transitions. [2021-06-12 19:26:00,455 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) [2021-06-12 19:26:00,455 INFO L276 IsEmpty]: Start isEmpty. Operand 13663 states and 34243 transitions. [2021-06-12 19:26:00,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-12 19:26:00,464 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:26:00,464 INFO L472 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:26:00,665 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 510 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1077 [2021-06-12 19:26:00,665 INFO L430 AbstractCegarLoop]: === Iteration 519 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:26:00,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:26:00,665 INFO L82 PathProgramCache]: Analyzing trace with hash -1740888523, now seen corresponding path program 151 times [2021-06-12 19:26:00,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:26:00,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226740669] [2021-06-12 19:26:00,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:26:00,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:26:00,814 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 8 proven. 167 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:26:00,814 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:26:00,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226740669] [2021-06-12 19:26:00,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1226740669] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:26:00,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543598539] [2021-06-12 19:26:00,814 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 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 [2021-06-12 19:26:00,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:26:00,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 19:26:00,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:26:00,927 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 8 proven. 167 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:26:00,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1543598539] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:26:00,927 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:26:00,927 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 17 [2021-06-12 19:26:00,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054899184] [2021-06-12 19:26:00,927 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:26:00,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:26:00,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:26:00,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=271, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:26:00,928 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) [2021-06-12 19:26:01,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:26:01,753 INFO L93 Difference]: Finished difference Result 18431 states and 44151 transitions. [2021-06-12 19:26:01,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 19:26:01,754 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 [2021-06-12 19:26:01,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:26:01,818 INFO L225 Difference]: With dead ends: 18431 [2021-06-12 19:26:01,818 INFO L226 Difference]: Without dead ends: 18317 [2021-06-12 19:26:01,818 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 58 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 432.2ms TimeCoverageRelationStatistics Valid=224, Invalid=1182, Unknown=0, NotChecked=0, Total=1406 [2021-06-12 19:26:01,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18317 states. [2021-06-12 19:26:01,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18317 to 13282. [2021-06-12 19:26:01,973 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) [2021-06-12 19:26:01,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13282 states to 13282 states and 33271 transitions. [2021-06-12 19:26:01,994 INFO L78 Accepts]: Start accepts. Automaton has 13282 states and 33271 transitions. Word has length 59 [2021-06-12 19:26:01,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:26:01,994 INFO L482 AbstractCegarLoop]: Abstraction has 13282 states and 33271 transitions. [2021-06-12 19:26:01,994 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) [2021-06-12 19:26:01,994 INFO L276 IsEmpty]: Start isEmpty. Operand 13282 states and 33271 transitions. [2021-06-12 19:26:02,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-12 19:26:02,002 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:26:02,002 INFO L472 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:26:02,203 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 511 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1078 [2021-06-12 19:26:02,203 INFO L430 AbstractCegarLoop]: === Iteration 520 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:26:02,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:26:02,203 INFO L82 PathProgramCache]: Analyzing trace with hash 285880821, now seen corresponding path program 310 times [2021-06-12 19:26:02,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:26:02,203 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001535762] [2021-06-12 19:26:02,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:26:02,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:26:02,368 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 18 proven. 157 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:26:02,368 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:26:02,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001535762] [2021-06-12 19:26:02,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001535762] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:26:02,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269385949] [2021-06-12 19:26:02,369 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 [2021-06-12 19:26:02,398 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:26:02,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:26:02,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 19:26:02,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:26:02,674 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 15 proven. 160 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:26:02,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1269385949] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:26:02,675 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:26:02,675 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 23 [2021-06-12 19:26:02,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940366921] [2021-06-12 19:26:02,675 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 19:26:02,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:26:02,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 19:26:02,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:26:02,675 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) [2021-06-12 19:26:03,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:26:03,753 INFO L93 Difference]: Finished difference Result 13442 states and 33525 transitions. [2021-06-12 19:26:03,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 19:26:03,753 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 [2021-06-12 19:26:03,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:26:03,768 INFO L225 Difference]: With dead ends: 13442 [2021-06-12 19:26:03,768 INFO L226 Difference]: Without dead ends: 13362 [2021-06-12 19:26:03,768 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 310.5ms TimeCoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:26:03,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13362 states. [2021-06-12 19:26:03,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13362 to 13282. [2021-06-12 19:26:03,924 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) [2021-06-12 19:26:03,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13282 states to 13282 states and 33220 transitions. [2021-06-12 19:26:03,945 INFO L78 Accepts]: Start accepts. Automaton has 13282 states and 33220 transitions. Word has length 59 [2021-06-12 19:26:03,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:26:03,945 INFO L482 AbstractCegarLoop]: Abstraction has 13282 states and 33220 transitions. [2021-06-12 19:26:03,945 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) [2021-06-12 19:26:03,945 INFO L276 IsEmpty]: Start isEmpty. Operand 13282 states and 33220 transitions. [2021-06-12 19:26:03,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-12 19:26:03,954 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:26:03,954 INFO L472 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:26:04,154 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 512 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1079 [2021-06-12 19:26:04,154 INFO L430 AbstractCegarLoop]: === Iteration 521 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:26:04,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:26:04,155 INFO L82 PathProgramCache]: Analyzing trace with hash 233038186, now seen corresponding path program 311 times [2021-06-12 19:26:04,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:26:04,155 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663214447] [2021-06-12 19:26:04,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:26:04,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:26:04,276 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 88 proven. 89 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:26:04,276 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:26:04,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663214447] [2021-06-12 19:26:04,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663214447] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:26:04,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76089738] [2021-06-12 19:26:04,277 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 [2021-06-12 19:26:04,307 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-06-12 19:26:04,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:26:04,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 19:26:04,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:26:04,491 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 88 proven. 89 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:26:04,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [76089738] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:26:04,491 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:26:04,491 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 27 [2021-06-12 19:26:04,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541927683] [2021-06-12 19:26:04,491 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-12 19:26:04,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:26:04,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-12 19:26:04,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=567, Unknown=0, NotChecked=0, Total=756 [2021-06-12 19:26:04,492 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) [2021-06-12 19:26:05,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:26:05,254 INFO L93 Difference]: Finished difference Result 16482 states and 39782 transitions. [2021-06-12 19:26:05,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 19:26:05,254 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 [2021-06-12 19:26:05,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:26:05,273 INFO L225 Difference]: With dead ends: 16482 [2021-06-12 19:26:05,273 INFO L226 Difference]: Without dead ends: 16482 [2021-06-12 19:26:05,273 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 361.8ms TimeCoverageRelationStatistics Valid=499, Invalid=1223, Unknown=0, NotChecked=0, Total=1722 [2021-06-12 19:26:05,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16482 states. [2021-06-12 19:26:05,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16482 to 13694. [2021-06-12 19:26:05,449 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) [2021-06-12 19:26:05,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13694 states to 13694 states and 34455 transitions. [2021-06-12 19:26:05,471 INFO L78 Accepts]: Start accepts. Automaton has 13694 states and 34455 transitions. Word has length 59 [2021-06-12 19:26:05,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:26:05,471 INFO L482 AbstractCegarLoop]: Abstraction has 13694 states and 34455 transitions. [2021-06-12 19:26:05,471 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) [2021-06-12 19:26:05,471 INFO L276 IsEmpty]: Start isEmpty. Operand 13694 states and 34455 transitions. [2021-06-12 19:26:05,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-12 19:26:05,480 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:26:05,480 INFO L472 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:26:05,681 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1080,513 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:26:05,681 INFO L430 AbstractCegarLoop]: === Iteration 522 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:26:05,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:26:05,681 INFO L82 PathProgramCache]: Analyzing trace with hash -2141933289, now seen corresponding path program 152 times [2021-06-12 19:26:05,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:26:05,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286015271] [2021-06-12 19:26:05,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:26:05,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:26:05,819 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 8 proven. 167 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:26:05,820 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:26:05,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286015271] [2021-06-12 19:26:05,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286015271] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:26:05,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475625566] [2021-06-12 19:26:05,820 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 [2021-06-12 19:26:05,848 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:26:05,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:26:05,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:26:05,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:26:06,710 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 49 proven. 127 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:26:06,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [475625566] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:26:06,711 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:26:06,711 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19] total 33 [2021-06-12 19:26:06,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720331820] [2021-06-12 19:26:06,711 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-06-12 19:26:06,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:26:06,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-06-12 19:26:06,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1004, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 19:26:06,711 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) [2021-06-12 19:26:16,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:26:16,312 INFO L93 Difference]: Finished difference Result 28070 states and 65966 transitions. [2021-06-12 19:26:16,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 229 states. [2021-06-12 19:26:16,312 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 [2021-06-12 19:26:16,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:26:16,346 INFO L225 Difference]: With dead ends: 28070 [2021-06-12 19:26:16,346 INFO L226 Difference]: Without dead ends: 27508 [2021-06-12 19:26:16,350 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 245 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23843 ImplicationChecksByTransitivity, 7918.5ms TimeCoverageRelationStatistics Valid=7596, Invalid=53166, Unknown=0, NotChecked=0, Total=60762 [2021-06-12 19:26:16,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27508 states. [2021-06-12 19:26:16,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27508 to 13479. [2021-06-12 19:26:16,583 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) [2021-06-12 19:26:16,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13479 states to 13479 states and 34550 transitions. [2021-06-12 19:26:16,603 INFO L78 Accepts]: Start accepts. Automaton has 13479 states and 34550 transitions. Word has length 59 [2021-06-12 19:26:16,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:26:16,603 INFO L482 AbstractCegarLoop]: Abstraction has 13479 states and 34550 transitions. [2021-06-12 19:26:16,603 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) [2021-06-12 19:26:16,604 INFO L276 IsEmpty]: Start isEmpty. Operand 13479 states and 34550 transitions. [2021-06-12 19:26:16,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-12 19:26:16,612 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:26:16,612 INFO L472 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:26:16,812 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1081,514 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:26:16,812 INFO L430 AbstractCegarLoop]: === Iteration 523 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:26:16,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:26:16,812 INFO L82 PathProgramCache]: Analyzing trace with hash 229597463, now seen corresponding path program 312 times [2021-06-12 19:26:16,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:26:16,812 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779400265] [2021-06-12 19:26:16,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:26:16,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:26:16,959 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 18 proven. 157 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:26:16,959 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:26:16,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779400265] [2021-06-12 19:26:16,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779400265] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:26:16,959 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518138938] [2021-06-12 19:26:16,959 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 [2021-06-12 19:26:16,990 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-06-12 19:26:16,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:26:16,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 19:26:16,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:26:17,257 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 15 proven. 160 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:26:17,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [518138938] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:26:17,257 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:26:17,257 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 21 [2021-06-12 19:26:17,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142145918] [2021-06-12 19:26:17,257 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 19:26:17,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:26:17,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 19:26:17,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:26:17,258 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) [2021-06-12 19:26:18,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:26:18,207 INFO L93 Difference]: Finished difference Result 13564 states and 34688 transitions. [2021-06-12 19:26:18,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:26:18,207 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 [2021-06-12 19:26:18,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:26:18,220 INFO L225 Difference]: With dead ends: 13564 [2021-06-12 19:26:18,220 INFO L226 Difference]: Without dead ends: 13496 [2021-06-12 19:26:18,221 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 259.3ms TimeCoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:26:18,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13496 states. [2021-06-12 19:26:18,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13496 to 13479. [2021-06-12 19:26:18,363 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) [2021-06-12 19:26:18,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13479 states to 13479 states and 34520 transitions. [2021-06-12 19:26:18,387 INFO L78 Accepts]: Start accepts. Automaton has 13479 states and 34520 transitions. Word has length 59 [2021-06-12 19:26:18,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:26:18,387 INFO L482 AbstractCegarLoop]: Abstraction has 13479 states and 34520 transitions. [2021-06-12 19:26:18,387 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) [2021-06-12 19:26:18,387 INFO L276 IsEmpty]: Start isEmpty. Operand 13479 states and 34520 transitions. [2021-06-12 19:26:18,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-12 19:26:18,398 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:26:18,398 INFO L472 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:26:18,600 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1091,515 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:26:18,601 INFO L430 AbstractCegarLoop]: === Iteration 524 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:26:18,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:26:18,601 INFO L82 PathProgramCache]: Analyzing trace with hash -1178079806, now seen corresponding path program 313 times [2021-06-12 19:26:18,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:26:18,601 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215248736] [2021-06-12 19:26:18,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:26:18,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:26:18,711 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 86 proven. 91 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:26:18,711 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:26:18,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215248736] [2021-06-12 19:26:18,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215248736] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:26:18,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584368526] [2021-06-12 19:26:18,711 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 [2021-06-12 19:26:18,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:26:18,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 19:26:18,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:26:18,832 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 86 proven. 91 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:26:18,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [584368526] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:26:18,833 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:26:18,833 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-06-12 19:26:18,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738393910] [2021-06-12 19:26:18,833 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:26:18,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:26:18,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:26:18,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:26:18,833 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) [2021-06-12 19:26:19,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:26:19,192 INFO L93 Difference]: Finished difference Result 16700 states and 41187 transitions. [2021-06-12 19:26:19,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 19:26:19,193 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 [2021-06-12 19:26:19,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:26:19,212 INFO L225 Difference]: With dead ends: 16700 [2021-06-12 19:26:19,213 INFO L226 Difference]: Without dead ends: 16700 [2021-06-12 19:26:19,213 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 185.2ms TimeCoverageRelationStatistics Valid=219, Invalid=381, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:26:19,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16700 states. [2021-06-12 19:26:19,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16700 to 14028. [2021-06-12 19:26:19,395 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) [2021-06-12 19:26:19,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14028 states to 14028 states and 36163 transitions. [2021-06-12 19:26:19,417 INFO L78 Accepts]: Start accepts. Automaton has 14028 states and 36163 transitions. Word has length 59 [2021-06-12 19:26:19,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:26:19,417 INFO L482 AbstractCegarLoop]: Abstraction has 14028 states and 36163 transitions. [2021-06-12 19:26:19,417 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) [2021-06-12 19:26:19,417 INFO L276 IsEmpty]: Start isEmpty. Operand 14028 states and 36163 transitions. [2021-06-12 19:26:19,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-12 19:26:19,425 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:26:19,425 INFO L472 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:26:19,626 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1092,516 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:26:19,626 INFO L430 AbstractCegarLoop]: === Iteration 525 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:26:19,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:26:19,626 INFO L82 PathProgramCache]: Analyzing trace with hash 1136189813, now seen corresponding path program 153 times [2021-06-12 19:26:19,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:26:19,626 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159296982] [2021-06-12 19:26:19,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:26:19,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:26:19,753 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 8 proven. 167 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:26:19,753 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:26:19,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159296982] [2021-06-12 19:26:19,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159296982] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:26:19,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [364115327] [2021-06-12 19:26:19,753 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 [2021-06-12 19:26:19,785 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-12 19:26:19,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:26:19,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 19:26:19,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:26:19,870 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 8 proven. 167 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:26:19,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [364115327] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:26:19,871 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:26:19,871 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-12 19:26:19,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334368952] [2021-06-12 19:26:19,871 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:26:19,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:26:19,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:26:19,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:26:19,871 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) [2021-06-12 19:26:20,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:26:20,588 INFO L93 Difference]: Finished difference Result 19202 states and 47249 transitions. [2021-06-12 19:26:20,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 19:26:20,589 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 [2021-06-12 19:26:20,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:26:20,611 INFO L225 Difference]: With dead ends: 19202 [2021-06-12 19:26:20,612 INFO L226 Difference]: Without dead ends: 19070 [2021-06-12 19:26:20,612 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 60 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 307.1ms TimeCoverageRelationStatistics Valid=144, Invalid=848, Unknown=0, NotChecked=0, Total=992 [2021-06-12 19:26:20,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19070 states. [2021-06-12 19:26:20,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19070 to 13945. [2021-06-12 19:26:20,813 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) [2021-06-12 19:26:20,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13945 states to 13945 states and 35937 transitions. [2021-06-12 19:26:20,836 INFO L78 Accepts]: Start accepts. Automaton has 13945 states and 35937 transitions. Word has length 59 [2021-06-12 19:26:20,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:26:20,836 INFO L482 AbstractCegarLoop]: Abstraction has 13945 states and 35937 transitions. [2021-06-12 19:26:20,836 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) [2021-06-12 19:26:20,836 INFO L276 IsEmpty]: Start isEmpty. Operand 13945 states and 35937 transitions. [2021-06-12 19:26:20,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-12 19:26:20,844 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:26:20,845 INFO L472 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:26:21,045 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1093,517 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:26:21,045 INFO L430 AbstractCegarLoop]: === Iteration 526 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:26:21,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:26:21,045 INFO L82 PathProgramCache]: Analyzing trace with hash 656626997, now seen corresponding path program 314 times [2021-06-12 19:26:21,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:26:21,045 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068497664] [2021-06-12 19:26:21,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:26:21,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:26:21,179 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 18 proven. 157 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:26:21,179 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:26:21,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068497664] [2021-06-12 19:26:21,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068497664] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:26:21,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847453507] [2021-06-12 19:26:21,179 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 [2021-06-12 19:26:21,207 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:26:21,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:26:21,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 19:26:21,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:26:21,409 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 15 proven. 160 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:26:21,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1847453507] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:26:21,410 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:26:21,410 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-06-12 19:26:21,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627270924] [2021-06-12 19:26:21,410 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 19:26:21,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:26:21,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 19:26:21,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:26:21,410 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) [2021-06-12 19:26:22,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:26:22,340 INFO L93 Difference]: Finished difference Result 14171 states and 36291 transitions. [2021-06-12 19:26:22,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 19:26:22,340 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 [2021-06-12 19:26:22,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:26:22,354 INFO L225 Difference]: With dead ends: 14171 [2021-06-12 19:26:22,354 INFO L226 Difference]: Without dead ends: 14115 [2021-06-12 19:26:22,354 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 248.4ms TimeCoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:26:22,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14115 states. [2021-06-12 19:26:22,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14115 to 13945. [2021-06-12 19:26:22,504 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) [2021-06-12 19:26:22,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13945 states to 13945 states and 35904 transitions. [2021-06-12 19:26:22,525 INFO L78 Accepts]: Start accepts. Automaton has 13945 states and 35904 transitions. Word has length 59 [2021-06-12 19:26:22,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:26:22,525 INFO L482 AbstractCegarLoop]: Abstraction has 13945 states and 35904 transitions. [2021-06-12 19:26:22,526 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) [2021-06-12 19:26:22,526 INFO L276 IsEmpty]: Start isEmpty. Operand 13945 states and 35904 transitions. [2021-06-12 19:26:22,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-12 19:26:22,534 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:26:22,534 INFO L472 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:26:22,734 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1094,518 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:26:22,734 INFO L430 AbstractCegarLoop]: === Iteration 527 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:26:22,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:26:22,735 INFO L82 PathProgramCache]: Analyzing trace with hash -1251305348, now seen corresponding path program 154 times [2021-06-12 19:26:22,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:26:22,735 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519642074] [2021-06-12 19:26:22,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:26:22,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:26:22,829 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 52 proven. 124 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:26:22,829 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:26:22,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519642074] [2021-06-12 19:26:22,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519642074] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:26:22,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886624489] [2021-06-12 19:26:22,830 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 [2021-06-12 19:26:22,857 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:26:22,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:26:22,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 19:26:22,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:26:22,949 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 53 proven. 124 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:26:22,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1886624489] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:26:22,950 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:26:22,950 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 15 [2021-06-12 19:26:22,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990462166] [2021-06-12 19:26:22,950 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:26:22,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:26:22,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:26:22,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:26:22,950 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) [2021-06-12 19:26:23,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:26:23,205 INFO L93 Difference]: Finished difference Result 16427 states and 40999 transitions. [2021-06-12 19:26:23,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 19:26:23,205 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 [2021-06-12 19:26:23,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:26:23,223 INFO L225 Difference]: With dead ends: 16427 [2021-06-12 19:26:23,223 INFO L226 Difference]: Without dead ends: 16325 [2021-06-12 19:26:23,223 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 133.2ms TimeCoverageRelationStatistics Valid=128, Invalid=292, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:26:23,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16325 states. [2021-06-12 19:26:23,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16325 to 12866. [2021-06-12 19:26:23,375 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) [2021-06-12 19:26:23,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12866 states to 12866 states and 33152 transitions. [2021-06-12 19:26:23,394 INFO L78 Accepts]: Start accepts. Automaton has 12866 states and 33152 transitions. Word has length 59 [2021-06-12 19:26:23,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:26:23,394 INFO L482 AbstractCegarLoop]: Abstraction has 12866 states and 33152 transitions. [2021-06-12 19:26:23,394 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) [2021-06-12 19:26:23,394 INFO L276 IsEmpty]: Start isEmpty. Operand 12866 states and 33152 transitions. [2021-06-12 19:26:23,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-12 19:26:23,402 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:26:23,402 INFO L472 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:26:23,602 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 519 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1095 [2021-06-12 19:26:23,602 INFO L430 AbstractCegarLoop]: === Iteration 528 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:26:23,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:26:23,602 INFO L82 PathProgramCache]: Analyzing trace with hash -151060374, now seen corresponding path program 315 times [2021-06-12 19:26:23,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:26:23,602 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349917321] [2021-06-12 19:26:23,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:26:23,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:26:23,699 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 84 proven. 93 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:26:23,699 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:26:23,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349917321] [2021-06-12 19:26:23,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349917321] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:26:23,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061547362] [2021-06-12 19:26:23,699 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 [2021-06-12 19:26:23,731 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-06-12 19:26:23,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:26:23,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 19:26:23,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:26:23,822 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 84 proven. 93 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:26:23,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2061547362] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:26:23,822 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:26:23,823 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-06-12 19:26:23,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015406635] [2021-06-12 19:26:23,823 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:26:23,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:26:23,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:26:23,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:26:23,823 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) [2021-06-12 19:26:24,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:26:24,150 INFO L93 Difference]: Finished difference Result 16089 states and 39723 transitions. [2021-06-12 19:26:24,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:26:24,151 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 [2021-06-12 19:26:24,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:26:24,171 INFO L225 Difference]: With dead ends: 16089 [2021-06-12 19:26:24,171 INFO L226 Difference]: Without dead ends: 16089 [2021-06-12 19:26:24,171 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 148.5ms TimeCoverageRelationStatistics Valid=174, Invalid=288, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:26:24,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16089 states. [2021-06-12 19:26:24,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16089 to 13293. [2021-06-12 19:26:24,327 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) [2021-06-12 19:26:24,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13293 states to 13293 states and 34432 transitions. [2021-06-12 19:26:24,346 INFO L78 Accepts]: Start accepts. Automaton has 13293 states and 34432 transitions. Word has length 59 [2021-06-12 19:26:24,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:26:24,347 INFO L482 AbstractCegarLoop]: Abstraction has 13293 states and 34432 transitions. [2021-06-12 19:26:24,347 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) [2021-06-12 19:26:24,347 INFO L276 IsEmpty]: Start isEmpty. Operand 13293 states and 34432 transitions. [2021-06-12 19:26:24,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-12 19:26:24,354 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:26:24,354 INFO L472 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:26:24,554 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 520 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1101 [2021-06-12 19:26:24,554 INFO L430 AbstractCegarLoop]: === Iteration 529 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:26:24,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:26:24,554 INFO L82 PathProgramCache]: Analyzing trace with hash 541310423, now seen corresponding path program 155 times [2021-06-12 19:26:24,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:26:24,555 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977241418] [2021-06-12 19:26:24,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:26:24,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:26:24,666 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 8 proven. 167 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:26:24,666 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:26:24,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977241418] [2021-06-12 19:26:24,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977241418] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:26:24,666 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340258387] [2021-06-12 19:26:24,666 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 [2021-06-12 19:26:24,697 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-06-12 19:26:24,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:26:24,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 19:26:24,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:26:24,780 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 8 proven. 167 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:26:24,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1340258387] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:26:24,780 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:26:24,780 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-12 19:26:24,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146023079] [2021-06-12 19:26:24,781 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:26:24,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:26:24,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:26:24,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:26:24,781 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) [2021-06-12 19:26:25,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:26:25,440 INFO L93 Difference]: Finished difference Result 17164 states and 42755 transitions. [2021-06-12 19:26:25,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 19:26:25,440 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 [2021-06-12 19:26:25,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:26:25,460 INFO L225 Difference]: With dead ends: 17164 [2021-06-12 19:26:25,460 INFO L226 Difference]: Without dead ends: 17150 [2021-06-12 19:26:25,460 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 61 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 254.3ms TimeCoverageRelationStatistics Valid=113, Invalid=699, Unknown=0, NotChecked=0, Total=812 [2021-06-12 19:26:25,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17150 states. [2021-06-12 19:26:25,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17150 to 13291. [2021-06-12 19:26:25,676 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) [2021-06-12 19:26:25,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13291 states to 13291 states and 34467 transitions. [2021-06-12 19:26:25,697 INFO L78 Accepts]: Start accepts. Automaton has 13291 states and 34467 transitions. Word has length 59 [2021-06-12 19:26:25,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:26:25,697 INFO L482 AbstractCegarLoop]: Abstraction has 13291 states and 34467 transitions. [2021-06-12 19:26:25,697 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) [2021-06-12 19:26:25,697 INFO L276 IsEmpty]: Start isEmpty. Operand 13291 states and 34467 transitions. [2021-06-12 19:26:25,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-12 19:26:25,706 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:26:25,706 INFO L472 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:26:25,906 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 521 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1102 [2021-06-12 19:26:25,906 INFO L430 AbstractCegarLoop]: === Iteration 530 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:26:25,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:26:25,906 INFO L82 PathProgramCache]: Analyzing trace with hash 379258327, now seen corresponding path program 316 times [2021-06-12 19:26:25,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:26:25,906 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416292921] [2021-06-12 19:26:25,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:26:25,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:26:26,030 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 18 proven. 157 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:26:26,030 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:26:26,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416292921] [2021-06-12 19:26:26,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416292921] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:26:26,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719101058] [2021-06-12 19:26:26,030 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 [2021-06-12 19:26:26,058 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:26:26,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:26:26,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 19:26:26,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:26:26,323 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 15 proven. 160 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:26:26,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [719101058] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:26:26,323 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:26:26,323 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 17 [2021-06-12 19:26:26,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006986041] [2021-06-12 19:26:26,324 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:26:26,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:26:26,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:26:26,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:26:26,324 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) [2021-06-12 19:26:26,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:26:26,921 INFO L93 Difference]: Finished difference Result 13395 states and 34626 transitions. [2021-06-12 19:26:26,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 19:26:26,922 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 [2021-06-12 19:26:26,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:26:26,938 INFO L225 Difference]: With dead ends: 13395 [2021-06-12 19:26:26,938 INFO L226 Difference]: Without dead ends: 13351 [2021-06-12 19:26:26,938 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 58 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 277.6ms TimeCoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:26:26,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13351 states. [2021-06-12 19:26:27,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13351 to 13291. [2021-06-12 19:26:27,093 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) [2021-06-12 19:26:27,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13291 states to 13291 states and 34458 transitions. [2021-06-12 19:26:27,115 INFO L78 Accepts]: Start accepts. Automaton has 13291 states and 34458 transitions. Word has length 59 [2021-06-12 19:26:27,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:26:27,115 INFO L482 AbstractCegarLoop]: Abstraction has 13291 states and 34458 transitions. [2021-06-12 19:26:27,115 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) [2021-06-12 19:26:27,115 INFO L276 IsEmpty]: Start isEmpty. Operand 13291 states and 34458 transitions. [2021-06-12 19:26:27,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-12 19:26:27,123 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:26:27,123 INFO L472 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:26:27,324 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1103,522 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:26:27,324 INFO L430 AbstractCegarLoop]: === Iteration 531 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:26:27,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:26:27,324 INFO L82 PathProgramCache]: Analyzing trace with hash -1601439350, now seen corresponding path program 156 times [2021-06-12 19:26:27,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:26:27,324 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76803441] [2021-06-12 19:26:27,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:26:27,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:26:27,419 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 63 proven. 114 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:26:27,419 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:26:27,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76803441] [2021-06-12 19:26:27,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76803441] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:26:27,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533442011] [2021-06-12 19:26:27,419 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 [2021-06-12 19:26:27,449 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-06-12 19:26:27,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:26:27,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 19:26:27,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:26:27,571 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 65 proven. 114 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:26:27,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [533442011] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:26:27,571 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:26:27,571 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 19 [2021-06-12 19:26:27,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852098010] [2021-06-12 19:26:27,571 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 19:26:27,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:26:27,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 19:26:27,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:26:27,571 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) [2021-06-12 19:26:27,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:26:27,913 INFO L93 Difference]: Finished difference Result 15297 states and 38508 transitions. [2021-06-12 19:26:27,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 19:26:27,913 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 [2021-06-12 19:26:27,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:26:27,932 INFO L225 Difference]: With dead ends: 15297 [2021-06-12 19:26:27,932 INFO L226 Difference]: Without dead ends: 15243 [2021-06-12 19:26:27,932 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 155.1ms TimeCoverageRelationStatistics Valid=135, Invalid=417, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:26:27,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15243 states. [2021-06-12 19:26:28,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15243 to 13345. [2021-06-12 19:26:28,109 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) [2021-06-12 19:26:28,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13345 states to 13345 states and 34633 transitions. [2021-06-12 19:26:28,132 INFO L78 Accepts]: Start accepts. Automaton has 13345 states and 34633 transitions. Word has length 59 [2021-06-12 19:26:28,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:26:28,132 INFO L482 AbstractCegarLoop]: Abstraction has 13345 states and 34633 transitions. [2021-06-12 19:26:28,132 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) [2021-06-12 19:26:28,132 INFO L276 IsEmpty]: Start isEmpty. Operand 13345 states and 34633 transitions. [2021-06-12 19:26:28,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-12 19:26:28,140 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:26:28,140 INFO L472 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:26:28,341 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 523 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1104 [2021-06-12 19:26:28,341 INFO L430 AbstractCegarLoop]: === Iteration 532 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:26:28,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:26:28,341 INFO L82 PathProgramCache]: Analyzing trace with hash 815345346, now seen corresponding path program 317 times [2021-06-12 19:26:28,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:26:28,341 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387385980] [2021-06-12 19:26:28,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:26:28,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:26:28,427 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 82 proven. 95 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:26:28,427 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:26:28,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387385980] [2021-06-12 19:26:28,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387385980] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:26:28,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960559789] [2021-06-12 19:26:28,427 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 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 [2021-06-12 19:26:28,458 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-06-12 19:26:28,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:26:28,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 19:26:28,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:26:28,568 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 84 proven. 95 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:26:28,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960559789] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:26:28,569 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:26:28,569 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 16 [2021-06-12 19:26:28,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683268678] [2021-06-12 19:26:28,569 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:26:28,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:26:28,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:26:28,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:26:28,569 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) [2021-06-12 19:26:28,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:26:28,874 INFO L93 Difference]: Finished difference Result 16957 states and 41994 transitions. [2021-06-12 19:26:28,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:26:28,874 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 [2021-06-12 19:26:28,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:26:28,895 INFO L225 Difference]: With dead ends: 16957 [2021-06-12 19:26:28,896 INFO L226 Difference]: Without dead ends: 16957 [2021-06-12 19:26:28,896 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 139.2ms TimeCoverageRelationStatistics Valid=173, Invalid=289, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:26:28,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16957 states. [2021-06-12 19:26:29,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16957 to 13816. [2021-06-12 19:26:29,102 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) [2021-06-12 19:26:29,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13816 states to 13816 states and 36028 transitions. [2021-06-12 19:26:29,126 INFO L78 Accepts]: Start accepts. Automaton has 13816 states and 36028 transitions. Word has length 59 [2021-06-12 19:26:29,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:26:29,126 INFO L482 AbstractCegarLoop]: Abstraction has 13816 states and 36028 transitions. [2021-06-12 19:26:29,126 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) [2021-06-12 19:26:29,126 INFO L276 IsEmpty]: Start isEmpty. Operand 13816 states and 36028 transitions. [2021-06-12 19:26:29,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-12 19:26:29,135 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:26:29,135 INFO L472 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:26:29,335 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 524 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1110 [2021-06-12 19:26:29,335 INFO L430 AbstractCegarLoop]: === Iteration 533 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:26:29,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:26:29,336 INFO L82 PathProgramCache]: Analyzing trace with hash -1926034251, now seen corresponding path program 157 times [2021-06-12 19:26:29,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:26:29,336 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323426982] [2021-06-12 19:26:29,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:26:29,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:26:29,440 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 8 proven. 167 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:26:29,440 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:26:29,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323426982] [2021-06-12 19:26:29,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323426982] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:26:29,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033297015] [2021-06-12 19:26:29,440 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 [2021-06-12 19:26:29,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:26:29,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 19:26:29,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:26:29,555 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 8 proven. 167 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:26:29,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1033297015] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:26:29,555 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:26:29,555 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-12 19:26:29,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289700688] [2021-06-12 19:26:29,556 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:26:29,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:26:29,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:26:29,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:26:29,556 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) [2021-06-12 19:26:30,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:26:30,248 INFO L93 Difference]: Finished difference Result 16406 states and 41478 transitions. [2021-06-12 19:26:30,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 19:26:30,249 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 [2021-06-12 19:26:30,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:26:30,269 INFO L225 Difference]: With dead ends: 16406 [2021-06-12 19:26:30,269 INFO L226 Difference]: Without dead ends: 16388 [2021-06-12 19:26:30,269 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 216.1ms TimeCoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2021-06-12 19:26:30,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16388 states. [2021-06-12 19:26:30,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16388 to 13495. [2021-06-12 19:26:30,440 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) [2021-06-12 19:26:30,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13495 states to 13495 states and 35378 transitions. [2021-06-12 19:26:30,461 INFO L78 Accepts]: Start accepts. Automaton has 13495 states and 35378 transitions. Word has length 59 [2021-06-12 19:26:30,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:26:30,461 INFO L482 AbstractCegarLoop]: Abstraction has 13495 states and 35378 transitions. [2021-06-12 19:26:30,461 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) [2021-06-12 19:26:30,462 INFO L276 IsEmpty]: Start isEmpty. Operand 13495 states and 35378 transitions. [2021-06-12 19:26:30,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-12 19:26:30,469 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:26:30,469 INFO L472 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:26:30,669 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 525 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1111 [2021-06-12 19:26:30,670 INFO L430 AbstractCegarLoop]: === Iteration 534 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:26:30,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:26:30,670 INFO L82 PathProgramCache]: Analyzing trace with hash -2102925195, now seen corresponding path program 318 times [2021-06-12 19:26:30,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:26:30,670 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51592516] [2021-06-12 19:26:30,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:26:30,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:26:30,781 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 18 proven. 157 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:26:30,781 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:26:30,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51592516] [2021-06-12 19:26:30,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51592516] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:26:30,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138543852] [2021-06-12 19:26:30,781 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 [2021-06-12 19:26:30,813 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-06-12 19:26:30,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:26:30,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 19:26:30,814 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:26:30,960 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 15 proven. 160 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:26:30,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2138543852] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:26:30,960 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:26:30,960 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 15 [2021-06-12 19:26:30,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663412889] [2021-06-12 19:26:30,960 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:26:30,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:26:30,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:26:30,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:26:30,961 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) [2021-06-12 19:26:31,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:26:31,400 INFO L93 Difference]: Finished difference Result 13544 states and 35453 transitions. [2021-06-12 19:26:31,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:26:31,401 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 [2021-06-12 19:26:31,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:26:31,415 INFO L225 Difference]: With dead ends: 13544 [2021-06-12 19:26:31,415 INFO L226 Difference]: Without dead ends: 13512 [2021-06-12 19:26:31,415 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 60 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 141.3ms TimeCoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:26:31,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13512 states. [2021-06-12 19:26:31,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13512 to 13495. [2021-06-12 19:26:31,552 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) [2021-06-12 19:26:31,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13495 states to 13495 states and 35372 transitions. [2021-06-12 19:26:31,573 INFO L78 Accepts]: Start accepts. Automaton has 13495 states and 35372 transitions. Word has length 59 [2021-06-12 19:26:31,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:26:31,573 INFO L482 AbstractCegarLoop]: Abstraction has 13495 states and 35372 transitions. [2021-06-12 19:26:31,573 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) [2021-06-12 19:26:31,573 INFO L276 IsEmpty]: Start isEmpty. Operand 13495 states and 35372 transitions. [2021-06-12 19:26:31,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-12 19:26:31,580 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:26:31,580 INFO L472 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:26:31,780 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 526 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1112 [2021-06-12 19:26:31,781 INFO L430 AbstractCegarLoop]: === Iteration 535 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:26:31,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:26:31,781 INFO L82 PathProgramCache]: Analyzing trace with hash 513630058, now seen corresponding path program 319 times [2021-06-12 19:26:31,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:26:31,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619103530] [2021-06-12 19:26:31,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:26:31,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:26:31,859 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 80 proven. 97 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:26:31,859 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:26:31,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619103530] [2021-06-12 19:26:31,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619103530] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:26:31,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019401903] [2021-06-12 19:26:31,859 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 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 [2021-06-12 19:26:31,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:26:31,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:26:31,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:26:31,993 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 121 proven. 56 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:26:31,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2019401903] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:26:31,993 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:26:31,993 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-06-12 19:26:31,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676200308] [2021-06-12 19:26:31,994 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:26:31,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:26:31,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:26:31,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=125, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:26:31,994 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) [2021-06-12 19:26:32,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:26:32,261 INFO L93 Difference]: Finished difference Result 16977 states and 42453 transitions. [2021-06-12 19:26:32,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:26:32,262 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 [2021-06-12 19:26:32,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:26:32,282 INFO L225 Difference]: With dead ends: 16977 [2021-06-12 19:26:32,282 INFO L226 Difference]: Without dead ends: 16977 [2021-06-12 19:26:32,282 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 108.3ms TimeCoverageRelationStatistics Valid=128, Invalid=178, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:26:32,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16977 states. [2021-06-12 19:26:32,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16977 to 14002. [2021-06-12 19:26:32,479 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) [2021-06-12 19:26:32,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14002 states to 14002 states and 36871 transitions. [2021-06-12 19:26:32,501 INFO L78 Accepts]: Start accepts. Automaton has 14002 states and 36871 transitions. Word has length 59 [2021-06-12 19:26:32,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:26:32,501 INFO L482 AbstractCegarLoop]: Abstraction has 14002 states and 36871 transitions. [2021-06-12 19:26:32,501 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) [2021-06-12 19:26:32,501 INFO L276 IsEmpty]: Start isEmpty. Operand 14002 states and 36871 transitions. [2021-06-12 19:26:32,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-12 19:26:32,509 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:26:32,509 INFO L472 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:26:32,709 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 527 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1113 [2021-06-12 19:26:32,709 INFO L430 AbstractCegarLoop]: === Iteration 536 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:26:32,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:26:32,709 INFO L82 PathProgramCache]: Analyzing trace with hash -257205609, now seen corresponding path program 158 times [2021-06-12 19:26:32,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:26:32,709 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001840779] [2021-06-12 19:26:32,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:26:32,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:26:32,802 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 8 proven. 167 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:26:32,803 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:26:32,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001840779] [2021-06-12 19:26:32,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001840779] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:26:32,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348891149] [2021-06-12 19:26:32,803 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 [2021-06-12 19:26:32,831 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:26:32,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:26:32,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 19:26:32,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:26:32,917 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 8 proven. 167 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:26:32,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1348891149] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:26:32,917 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:26:32,917 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-12 19:26:32,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419836117] [2021-06-12 19:26:32,917 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:26:32,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:26:32,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:26:32,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:26:32,918 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) [2021-06-12 19:26:33,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:26:33,476 INFO L93 Difference]: Finished difference Result 15466 states and 39872 transitions. [2021-06-12 19:26:33,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 19:26:33,477 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 [2021-06-12 19:26:33,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:26:33,495 INFO L225 Difference]: With dead ends: 15466 [2021-06-12 19:26:33,495 INFO L226 Difference]: Without dead ends: 15466 [2021-06-12 19:26:33,495 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 177.3ms TimeCoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:26:33,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15466 states. [2021-06-12 19:26:33,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15466 to 14020. [2021-06-12 19:26:33,727 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) [2021-06-12 19:26:33,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14020 states to 14020 states and 36922 transitions. [2021-06-12 19:26:33,749 INFO L78 Accepts]: Start accepts. Automaton has 14020 states and 36922 transitions. Word has length 59 [2021-06-12 19:26:33,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:26:33,749 INFO L482 AbstractCegarLoop]: Abstraction has 14020 states and 36922 transitions. [2021-06-12 19:26:33,750 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) [2021-06-12 19:26:33,750 INFO L276 IsEmpty]: Start isEmpty. Operand 14020 states and 36922 transitions. [2021-06-12 19:26:33,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-12 19:26:33,757 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:26:33,757 INFO L472 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:26:33,958 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 528 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1116 [2021-06-12 19:26:33,958 INFO L430 AbstractCegarLoop]: === Iteration 537 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:26:33,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:26:33,958 INFO L82 PathProgramCache]: Analyzing trace with hash -1890501993, now seen corresponding path program 320 times [2021-06-12 19:26:33,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:26:33,958 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677369113] [2021-06-12 19:26:33,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:26:33,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:26:34,063 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 18 proven. 157 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:26:34,063 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:26:34,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677369113] [2021-06-12 19:26:34,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677369113] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:26:34,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965517110] [2021-06-12 19:26:34,063 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 [2021-06-12 19:26:34,091 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:26:34,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:26:34,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 19:26:34,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:26:34,210 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 15 proven. 160 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:26:34,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1965517110] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:26:34,210 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:26:34,210 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-06-12 19:26:34,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101928269] [2021-06-12 19:26:34,211 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:26:34,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:26:34,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:26:34,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:26:34,211 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) [2021-06-12 19:26:34,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:26:34,593 INFO L93 Difference]: Finished difference Result 14088 states and 37021 transitions. [2021-06-12 19:26:34,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:26:34,593 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 [2021-06-12 19:26:34,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:26:34,609 INFO L225 Difference]: With dead ends: 14088 [2021-06-12 19:26:34,610 INFO L226 Difference]: Without dead ends: 14068 [2021-06-12 19:26:34,610 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 124.8ms TimeCoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:26:34,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14068 states. [2021-06-12 19:26:34,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14068 to 14020. [2021-06-12 19:26:34,766 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) [2021-06-12 19:26:34,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14020 states to 14020 states and 36919 transitions. [2021-06-12 19:26:34,789 INFO L78 Accepts]: Start accepts. Automaton has 14020 states and 36919 transitions. Word has length 59 [2021-06-12 19:26:34,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:26:34,789 INFO L482 AbstractCegarLoop]: Abstraction has 14020 states and 36919 transitions. [2021-06-12 19:26:34,789 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) [2021-06-12 19:26:34,789 INFO L276 IsEmpty]: Start isEmpty. Operand 14020 states and 36919 transitions. [2021-06-12 19:26:34,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-12 19:26:34,798 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:26:34,798 INFO L472 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:26:34,998 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1117,529 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:26:34,998 INFO L430 AbstractCegarLoop]: === Iteration 538 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:26:34,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:26:34,999 INFO L82 PathProgramCache]: Analyzing trace with hash -336914294, now seen corresponding path program 159 times [2021-06-12 19:26:34,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:26:34,999 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159161557] [2021-06-12 19:26:34,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:26:35,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:26:35,088 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 77 proven. 100 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:26:35,088 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:26:35,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159161557] [2021-06-12 19:26:35,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1159161557] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:26:35,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858932694] [2021-06-12 19:26:35,088 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 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 [2021-06-12 19:26:35,119 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-06-12 19:26:35,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:26:35,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 19:26:35,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:26:35,208 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 78 proven. 100 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:26:35,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [858932694] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:26:35,208 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:26:35,208 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 13 [2021-06-12 19:26:35,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124398537] [2021-06-12 19:26:35,208 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:26:35,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:26:35,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:26:35,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:26:35,209 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) [2021-06-12 19:26:35,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:26:35,403 INFO L93 Difference]: Finished difference Result 15125 states and 39073 transitions. [2021-06-12 19:26:35,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:26:35,404 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 [2021-06-12 19:26:35,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:26:35,423 INFO L225 Difference]: With dead ends: 15125 [2021-06-12 19:26:35,423 INFO L226 Difference]: Without dead ends: 15103 [2021-06-12 19:26:35,423 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 102.7ms TimeCoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:26:35,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15103 states. [2021-06-12 19:26:35,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15103 to 13957. [2021-06-12 19:26:35,591 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) [2021-06-12 19:26:35,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13957 states to 13957 states and 36783 transitions. [2021-06-12 19:26:35,614 INFO L78 Accepts]: Start accepts. Automaton has 13957 states and 36783 transitions. Word has length 59 [2021-06-12 19:26:35,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:26:35,614 INFO L482 AbstractCegarLoop]: Abstraction has 13957 states and 36783 transitions. [2021-06-12 19:26:35,614 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) [2021-06-12 19:26:35,615 INFO L276 IsEmpty]: Start isEmpty. Operand 13957 states and 36783 transitions. [2021-06-12 19:26:35,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-12 19:26:35,622 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:26:35,622 INFO L472 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:26:35,823 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1118,530 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:26:35,823 INFO L430 AbstractCegarLoop]: === Iteration 539 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:26:35,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:26:35,823 INFO L82 PathProgramCache]: Analyzing trace with hash 1535027189, now seen corresponding path program 160 times [2021-06-12 19:26:35,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:26:35,823 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978883347] [2021-06-12 19:26:35,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:26:35,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:26:35,917 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 8 proven. 167 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:26:35,918 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:26:35,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978883347] [2021-06-12 19:26:35,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978883347] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:26:35,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323265690] [2021-06-12 19:26:35,918 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 [2021-06-12 19:26:35,946 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:26:35,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:26:35,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 19:26:35,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:26:36,033 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 8 proven. 167 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:26:36,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1323265690] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:26:36,033 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:26:36,033 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-12 19:26:36,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227617856] [2021-06-12 19:26:36,034 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 19:26:36,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:26:36,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 19:26:36,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:26:36,034 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) [2021-06-12 19:26:36,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:26:36,592 INFO L93 Difference]: Finished difference Result 14854 states and 38533 transitions. [2021-06-12 19:26:36,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 19:26:36,592 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 [2021-06-12 19:26:36,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:26:36,611 INFO L225 Difference]: With dead ends: 14854 [2021-06-12 19:26:36,611 INFO L226 Difference]: Without dead ends: 14846 [2021-06-12 19:26:36,611 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 149.7ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:26:36,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14846 states. [2021-06-12 19:26:36,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14846 to 14042. [2021-06-12 19:26:36,786 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) [2021-06-12 19:26:36,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14042 states to 14042 states and 36979 transitions. [2021-06-12 19:26:36,809 INFO L78 Accepts]: Start accepts. Automaton has 14042 states and 36979 transitions. Word has length 59 [2021-06-12 19:26:36,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:26:36,809 INFO L482 AbstractCegarLoop]: Abstraction has 14042 states and 36979 transitions. [2021-06-12 19:26:36,810 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) [2021-06-12 19:26:36,810 INFO L276 IsEmpty]: Start isEmpty. Operand 14042 states and 36979 transitions. [2021-06-12 19:26:36,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-12 19:26:36,818 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:26:36,818 INFO L472 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:26:37,018 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 531 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1122 [2021-06-12 19:26:37,018 INFO L430 AbstractCegarLoop]: === Iteration 540 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:26:37,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:26:37,018 INFO L82 PathProgramCache]: Analyzing trace with hash -1259607115, now seen corresponding path program 321 times [2021-06-12 19:26:37,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:26:37,019 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654429838] [2021-06-12 19:26:37,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:26:37,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:26:37,107 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 19 proven. 156 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:26:37,107 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:26:37,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654429838] [2021-06-12 19:26:37,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654429838] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:26:37,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109851957] [2021-06-12 19:26:37,108 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 [2021-06-12 19:26:37,157 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-12 19:26:37,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:26:37,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 19:26:37,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:26:37,254 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 15 proven. 160 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:26:37,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1109851957] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:26:37,255 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:26:37,255 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-06-12 19:26:37,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270656633] [2021-06-12 19:26:37,255 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 19:26:37,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:26:37,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 19:26:37,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:26:37,255 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) [2021-06-12 19:26:37,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:26:37,978 INFO L93 Difference]: Finished difference Result 14554 states and 37840 transitions. [2021-06-12 19:26:37,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 19:26:37,979 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 [2021-06-12 19:26:37,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:26:37,995 INFO L225 Difference]: With dead ends: 14554 [2021-06-12 19:26:37,995 INFO L226 Difference]: Without dead ends: 14403 [2021-06-12 19:26:37,995 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 149.2ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:26:38,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14403 states. [2021-06-12 19:26:38,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14403 to 13894. [2021-06-12 19:26:38,165 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) [2021-06-12 19:26:38,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13894 states to 13894 states and 36632 transitions. [2021-06-12 19:26:38,188 INFO L78 Accepts]: Start accepts. Automaton has 13894 states and 36632 transitions. Word has length 59 [2021-06-12 19:26:38,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:26:38,188 INFO L482 AbstractCegarLoop]: Abstraction has 13894 states and 36632 transitions. [2021-06-12 19:26:38,188 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) [2021-06-12 19:26:38,189 INFO L276 IsEmpty]: Start isEmpty. Operand 13894 states and 36632 transitions. [2021-06-12 19:26:38,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-12 19:26:38,197 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:26:38,197 INFO L472 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:26:38,397 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 532 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1123 [2021-06-12 19:26:38,397 INFO L430 AbstractCegarLoop]: === Iteration 541 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:26:38,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:26:38,397 INFO L82 PathProgramCache]: Analyzing trace with hash -1873143295, now seen corresponding path program 322 times [2021-06-12 19:26:38,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:26:38,397 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134498729] [2021-06-12 19:26:38,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:26:38,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:26:38,506 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 157 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:26:38,507 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:26:38,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134498729] [2021-06-12 19:26:38,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134498729] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:26:38,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56913961] [2021-06-12 19:26:38,507 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 [2021-06-12 19:26:38,534 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:26:38,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:26:38,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 19:26:38,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:26:38,619 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 158 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:26:38,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [56913961] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:26:38,620 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:26:38,620 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-06-12 19:26:38,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715994916] [2021-06-12 19:26:38,620 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 19:26:38,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:26:38,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 19:26:38,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:26:38,620 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) [2021-06-12 19:26:39,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:26:39,101 INFO L93 Difference]: Finished difference Result 14649 states and 38103 transitions. [2021-06-12 19:26:39,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 19:26:39,102 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 [2021-06-12 19:26:39,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:26:39,119 INFO L225 Difference]: With dead ends: 14649 [2021-06-12 19:26:39,120 INFO L226 Difference]: Without dead ends: 14637 [2021-06-12 19:26:39,120 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 161.9ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:26:39,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14637 states. [2021-06-12 19:26:39,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14637 to 13896. [2021-06-12 19:26:39,268 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) [2021-06-12 19:26:39,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13896 states to 13896 states and 36636 transitions. [2021-06-12 19:26:39,289 INFO L78 Accepts]: Start accepts. Automaton has 13896 states and 36636 transitions. Word has length 59 [2021-06-12 19:26:39,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:26:39,289 INFO L482 AbstractCegarLoop]: Abstraction has 13896 states and 36636 transitions. [2021-06-12 19:26:39,289 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) [2021-06-12 19:26:39,290 INFO L276 IsEmpty]: Start isEmpty. Operand 13896 states and 36636 transitions. [2021-06-12 19:26:39,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-12 19:26:39,297 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:26:39,297 INFO L472 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:26:39,497 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 533 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1124 [2021-06-12 19:26:39,497 INFO L430 AbstractCegarLoop]: === Iteration 542 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:26:39,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:26:39,498 INFO L82 PathProgramCache]: Analyzing trace with hash 773466498, now seen corresponding path program 323 times [2021-06-12 19:26:39,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:26:39,498 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907307690] [2021-06-12 19:26:39,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:26:39,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:26:39,571 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 75 proven. 103 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:26:39,571 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:26:39,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907307690] [2021-06-12 19:26:39,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907307690] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:26:39,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116126543] [2021-06-12 19:26:39,571 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 [2021-06-12 19:26:39,602 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-06-12 19:26:39,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:26:39,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 19:26:39,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:26:39,707 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 76 proven. 103 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:26:39,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1116126543] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:26:39,708 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:26:39,708 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 14 [2021-06-12 19:26:39,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986296129] [2021-06-12 19:26:39,708 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:26:39,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:26:39,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:26:39,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:26:39,708 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) [2021-06-12 19:26:39,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:26:39,924 INFO L93 Difference]: Finished difference Result 16479 states and 41384 transitions. [2021-06-12 19:26:39,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:26:39,924 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 [2021-06-12 19:26:39,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:26:39,945 INFO L225 Difference]: With dead ends: 16479 [2021-06-12 19:26:39,945 INFO L226 Difference]: Without dead ends: 16473 [2021-06-12 19:26:39,945 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 90.8ms TimeCoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:26:39,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16473 states. [2021-06-12 19:26:40,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16473 to 13895. [2021-06-12 19:26:40,131 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) [2021-06-12 19:26:40,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13895 states to 13895 states and 36629 transitions. [2021-06-12 19:26:40,153 INFO L78 Accepts]: Start accepts. Automaton has 13895 states and 36629 transitions. Word has length 59 [2021-06-12 19:26:40,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:26:40,153 INFO L482 AbstractCegarLoop]: Abstraction has 13895 states and 36629 transitions. [2021-06-12 19:26:40,153 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) [2021-06-12 19:26:40,153 INFO L276 IsEmpty]: Start isEmpty. Operand 13895 states and 36629 transitions. [2021-06-12 19:26:40,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-12 19:26:40,160 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:26:40,160 INFO L472 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:26:40,360 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1125,534 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:26:40,361 INFO L430 AbstractCegarLoop]: === Iteration 543 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:26:40,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:26:40,361 INFO L82 PathProgramCache]: Analyzing trace with hash 268774039, now seen corresponding path program 324 times [2021-06-12 19:26:40,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:26:40,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759382498] [2021-06-12 19:26:40,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:26:40,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:26:40,453 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 158 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:26:40,453 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:26:40,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759382498] [2021-06-12 19:26:40,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759382498] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:26:40,453 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487092024] [2021-06-12 19:26:40,453 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 [2021-06-12 19:26:40,484 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-06-12 19:26:40,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:26:40,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 19:26:40,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:26:40,570 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 159 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:26:40,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [487092024] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:26:40,570 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:26:40,570 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-12 19:26:40,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896487078] [2021-06-12 19:26:40,571 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:26:40,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:26:40,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:26:40,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:26:40,571 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) [2021-06-12 19:26:41,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:26:41,350 INFO L93 Difference]: Finished difference Result 16130 states and 41196 transitions. [2021-06-12 19:26:41,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-12 19:26:41,350 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 [2021-06-12 19:26:41,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:26:41,371 INFO L225 Difference]: With dead ends: 16130 [2021-06-12 19:26:41,371 INFO L226 Difference]: Without dead ends: 16076 [2021-06-12 19:26:41,371 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 291.7ms TimeCoverageRelationStatistics Valid=141, Invalid=1049, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 19:26:41,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16076 states. [2021-06-12 19:26:41,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16076 to 14050. [2021-06-12 19:26:41,617 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) [2021-06-12 19:26:41,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14050 states to 14050 states and 37031 transitions. [2021-06-12 19:26:41,640 INFO L78 Accepts]: Start accepts. Automaton has 14050 states and 37031 transitions. Word has length 59 [2021-06-12 19:26:41,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:26:41,640 INFO L482 AbstractCegarLoop]: Abstraction has 14050 states and 37031 transitions. [2021-06-12 19:26:41,640 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) [2021-06-12 19:26:41,640 INFO L276 IsEmpty]: Start isEmpty. Operand 14050 states and 37031 transitions. [2021-06-12 19:26:41,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-12 19:26:41,648 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:26:41,648 INFO L472 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:26:41,848 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 535 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1128 [2021-06-12 19:26:41,848 INFO L430 AbstractCegarLoop]: === Iteration 544 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:26:41,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:26:41,849 INFO L82 PathProgramCache]: Analyzing trace with hash 1801333148, now seen corresponding path program 325 times [2021-06-12 19:26:41,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:26:41,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326157513] [2021-06-12 19:26:41,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:26:41,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:26:41,933 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 69 proven. 109 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:26:41,933 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:26:41,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326157513] [2021-06-12 19:26:41,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326157513] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:26:41,933 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246109935] [2021-06-12 19:26:41,933 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 [2021-06-12 19:26:41,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:26:41,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 19:26:41,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:26:42,044 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 69 proven. 109 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:26:42,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [246109935] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:26:42,044 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:26:42,044 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-06-12 19:26:42,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924633438] [2021-06-12 19:26:42,045 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:26:42,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:26:42,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:26:42,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:26:42,045 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) [2021-06-12 19:26:42,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:26:42,225 INFO L93 Difference]: Finished difference Result 16536 states and 41568 transitions. [2021-06-12 19:26:42,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:26:42,225 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 [2021-06-12 19:26:42,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:26:42,244 INFO L225 Difference]: With dead ends: 16536 [2021-06-12 19:26:42,245 INFO L226 Difference]: Without dead ends: 16518 [2021-06-12 19:26:42,245 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 86.0ms TimeCoverageRelationStatistics Valid=77, Invalid=133, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:26:42,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16518 states. [2021-06-12 19:26:42,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16518 to 14050. [2021-06-12 19:26:42,443 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) [2021-06-12 19:26:42,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14050 states to 14050 states and 37024 transitions. [2021-06-12 19:26:42,466 INFO L78 Accepts]: Start accepts. Automaton has 14050 states and 37024 transitions. Word has length 59 [2021-06-12 19:26:42,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:26:42,466 INFO L482 AbstractCegarLoop]: Abstraction has 14050 states and 37024 transitions. [2021-06-12 19:26:42,466 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) [2021-06-12 19:26:42,466 INFO L276 IsEmpty]: Start isEmpty. Operand 14050 states and 37024 transitions. [2021-06-12 19:26:42,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-12 19:26:42,474 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:26:42,474 INFO L472 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:26:42,675 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 536 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1129 [2021-06-12 19:26:42,675 INFO L430 AbstractCegarLoop]: === Iteration 545 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:26:42,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:26:42,675 INFO L82 PathProgramCache]: Analyzing trace with hash 423610573, now seen corresponding path program 326 times [2021-06-12 19:26:42,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:26:42,675 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441555886] [2021-06-12 19:26:42,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:26:42,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:26:42,779 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 158 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:26:42,779 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:26:42,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441555886] [2021-06-12 19:26:42,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441555886] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:26:42,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102395634] [2021-06-12 19:26:42,780 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 [2021-06-12 19:26:42,808 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:26:42,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:26:42,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-12 19:26:42,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:26:42,922 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:26:42,922 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 [2021-06-12 19:26:42,923 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:26:42,926 INFO L628 ElimStorePlain]: treesize reduction 20, result has 4.8 percent of original size [2021-06-12 19:26:42,926 INFO L518 ElimStorePlain]: Eliminatee B vanished before elimination [2021-06-12 19:26:42,926 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:26:42,927 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:1 [2021-06-12 19:26:42,935 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 20 proven. 155 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:26:42,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [102395634] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:26:42,936 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:26:42,936 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 16 [2021-06-12 19:26:42,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707159514] [2021-06-12 19:26:42,936 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:26:42,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:26:42,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:26:42,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:26:42,936 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) [2021-06-12 19:26:44,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:26:44,235 INFO L93 Difference]: Finished difference Result 19628 states and 48599 transitions. [2021-06-12 19:26:44,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-12 19:26:44,236 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 [2021-06-12 19:26:44,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:26:44,257 INFO L225 Difference]: With dead ends: 19628 [2021-06-12 19:26:44,258 INFO L226 Difference]: Without dead ends: 19460 [2021-06-12 19:26:44,258 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1220 ImplicationChecksByTransitivity, 615.7ms TimeCoverageRelationStatistics Valid=375, Invalid=3531, Unknown=0, NotChecked=0, Total=3906 [2021-06-12 19:26:44,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19460 states. [2021-06-12 19:26:44,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19460 to 14519. [2021-06-12 19:26:44,471 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) [2021-06-12 19:26:44,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14519 states to 14519 states and 38152 transitions. [2021-06-12 19:26:44,495 INFO L78 Accepts]: Start accepts. Automaton has 14519 states and 38152 transitions. Word has length 59 [2021-06-12 19:26:44,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:26:44,495 INFO L482 AbstractCegarLoop]: Abstraction has 14519 states and 38152 transitions. [2021-06-12 19:26:44,495 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) [2021-06-12 19:26:44,495 INFO L276 IsEmpty]: Start isEmpty. Operand 14519 states and 38152 transitions. [2021-06-12 19:26:44,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-12 19:26:44,505 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:26:44,505 INFO L472 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:26:44,705 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 537 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1133 [2021-06-12 19:26:44,705 INFO L430 AbstractCegarLoop]: === Iteration 546 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:26:44,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:26:44,705 INFO L82 PathProgramCache]: Analyzing trace with hash 810213250, now seen corresponding path program 327 times [2021-06-12 19:26:44,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:26:44,706 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763678452] [2021-06-12 19:26:44,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:26:44,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:26:44,799 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 58 proven. 120 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:26:44,799 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:26:44,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763678452] [2021-06-12 19:26:44,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763678452] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:26:44,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407481255] [2021-06-12 19:26:44,799 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 [2021-06-12 19:26:44,830 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-12 19:26:44,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:26:44,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 19:26:44,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:26:44,913 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 58 proven. 120 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:26:44,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1407481255] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:26:44,914 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:26:44,914 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-06-12 19:26:44,914 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600248997] [2021-06-12 19:26:44,914 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:26:44,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:26:44,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:26:44,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:26:44,914 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) [2021-06-12 19:26:45,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:26:45,103 INFO L93 Difference]: Finished difference Result 17127 states and 42923 transitions. [2021-06-12 19:26:45,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-12 19:26:45,103 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 [2021-06-12 19:26:45,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:26:45,123 INFO L225 Difference]: With dead ends: 17127 [2021-06-12 19:26:45,123 INFO L226 Difference]: Without dead ends: 17100 [2021-06-12 19:26:45,123 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 104.9ms TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:26:45,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17100 states. [2021-06-12 19:26:45,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17100 to 14519. [2021-06-12 19:26:45,381 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) [2021-06-12 19:26:45,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14519 states to 14519 states and 38149 transitions. [2021-06-12 19:26:45,404 INFO L78 Accepts]: Start accepts. Automaton has 14519 states and 38149 transitions. Word has length 59 [2021-06-12 19:26:45,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:26:45,405 INFO L482 AbstractCegarLoop]: Abstraction has 14519 states and 38149 transitions. [2021-06-12 19:26:45,405 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) [2021-06-12 19:26:45,405 INFO L276 IsEmpty]: Start isEmpty. Operand 14519 states and 38149 transitions. [2021-06-12 19:26:45,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-12 19:26:45,413 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:26:45,413 INFO L472 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:26:45,613 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 538 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1134 [2021-06-12 19:26:45,613 INFO L430 AbstractCegarLoop]: === Iteration 547 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:26:45,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:26:45,614 INFO L82 PathProgramCache]: Analyzing trace with hash 363919063, now seen corresponding path program 328 times [2021-06-12 19:26:45,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:26:45,614 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238486755] [2021-06-12 19:26:45,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:26:45,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:26:45,728 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 158 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:26:45,728 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:26:45,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238486755] [2021-06-12 19:26:45,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238486755] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:26:45,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982990557] [2021-06-12 19:26:45,728 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 [2021-06-12 19:26:45,756 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:26:45,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:26:45,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-12 19:26:45,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:26:45,890 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:26:45,891 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 [2021-06-12 19:26:45,892 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:26:45,893 INFO L628 ElimStorePlain]: treesize reduction 20, result has 4.8 percent of original size [2021-06-12 19:26:45,893 INFO L518 ElimStorePlain]: Eliminatee B vanished before elimination [2021-06-12 19:26:45,894 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:26:45,894 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:1 [2021-06-12 19:26:45,901 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 20 proven. 155 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:26:45,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1982990557] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:26:45,901 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:26:45,901 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 18 [2021-06-12 19:26:45,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213827203] [2021-06-12 19:26:45,901 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:26:45,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:26:45,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:26:45,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:26:45,901 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) [2021-06-12 19:26:48,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:26:48,290 INFO L93 Difference]: Finished difference Result 27358 states and 65118 transitions. [2021-06-12 19:26:48,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2021-06-12 19:26:48,290 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 [2021-06-12 19:26:48,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:26:48,327 INFO L225 Difference]: With dead ends: 27358 [2021-06-12 19:26:48,327 INFO L226 Difference]: Without dead ends: 26914 [2021-06-12 19:26:48,328 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4638 ImplicationChecksByTransitivity, 1299.7ms TimeCoverageRelationStatistics Valid=969, Invalid=11241, Unknown=0, NotChecked=0, Total=12210 [2021-06-12 19:26:48,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26914 states. [2021-06-12 19:26:48,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26914 to 15487. [2021-06-12 19:26:48,613 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) [2021-06-12 19:26:48,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15487 states to 15487 states and 40440 transitions. [2021-06-12 19:26:48,639 INFO L78 Accepts]: Start accepts. Automaton has 15487 states and 40440 transitions. Word has length 59 [2021-06-12 19:26:48,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:26:48,639 INFO L482 AbstractCegarLoop]: Abstraction has 15487 states and 40440 transitions. [2021-06-12 19:26:48,639 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) [2021-06-12 19:26:48,639 INFO L276 IsEmpty]: Start isEmpty. Operand 15487 states and 40440 transitions. [2021-06-12 19:26:48,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-12 19:26:48,648 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:26:48,648 INFO L472 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:26:48,848 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1139,539 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:26:48,848 INFO L430 AbstractCegarLoop]: === Iteration 548 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:26:48,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:26:48,849 INFO L82 PathProgramCache]: Analyzing trace with hash -2037475364, now seen corresponding path program 329 times [2021-06-12 19:26:48,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:26:48,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434699088] [2021-06-12 19:26:48,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:26:48,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:26:48,954 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 53 proven. 125 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:26:48,954 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:26:48,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434699088] [2021-06-12 19:26:48,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434699088] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:26:48,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738549986] [2021-06-12 19:26:48,954 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-12 19:26:48,984 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-06-12 19:26:48,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:26:48,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 19:26:48,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:26:49,102 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 53 proven. 125 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:26:49,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1738549986] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:26:49,102 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:26:49,102 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 17 [2021-06-12 19:26:49,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601597110] [2021-06-12 19:26:49,103 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:26:49,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:26:49,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:26:49,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:26:49,103 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) [2021-06-12 19:26:49,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:26:49,423 INFO L93 Difference]: Finished difference Result 18492 states and 46004 transitions. [2021-06-12 19:26:49,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:26:49,424 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 [2021-06-12 19:26:49,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:26:49,446 INFO L225 Difference]: With dead ends: 18492 [2021-06-12 19:26:49,446 INFO L226 Difference]: Without dead ends: 18456 [2021-06-12 19:26:49,447 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 156.6ms TimeCoverageRelationStatistics Valid=136, Invalid=326, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:26:49,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18456 states. [2021-06-12 19:26:49,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18456 to 15487. [2021-06-12 19:26:49,712 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) [2021-06-12 19:26:49,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15487 states to 15487 states and 40437 transitions. [2021-06-12 19:26:49,740 INFO L78 Accepts]: Start accepts. Automaton has 15487 states and 40437 transitions. Word has length 59 [2021-06-12 19:26:49,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:26:49,740 INFO L482 AbstractCegarLoop]: Abstraction has 15487 states and 40437 transitions. [2021-06-12 19:26:49,740 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) [2021-06-12 19:26:49,740 INFO L276 IsEmpty]: Start isEmpty. Operand 15487 states and 40437 transitions. [2021-06-12 19:26:49,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-12 19:26:49,749 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:26:49,749 INFO L472 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:26:49,949 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1140,540 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:26:49,949 INFO L430 AbstractCegarLoop]: === Iteration 549 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:26:49,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:26:49,950 INFO L82 PathProgramCache]: Analyzing trace with hash 210605197, now seen corresponding path program 330 times [2021-06-12 19:26:49,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:26:49,950 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607856894] [2021-06-12 19:26:49,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:26:49,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:26:50,072 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 158 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:26:50,072 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:26:50,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607856894] [2021-06-12 19:26:50,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607856894] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:26:50,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800949921] [2021-06-12 19:26:50,072 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 [2021-06-12 19:26:50,103 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-06-12 19:26:50,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:26:50,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 19:26:50,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:26:50,185 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 159 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:26:50,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [800949921] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:26:50,185 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:26:50,185 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-12 19:26:50,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429270052] [2021-06-12 19:26:50,185 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:26:50,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:26:50,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:26:50,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:26:50,186 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) [2021-06-12 19:26:53,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:26:53,963 INFO L93 Difference]: Finished difference Result 44514 states and 101971 transitions. [2021-06-12 19:26:53,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 191 states. [2021-06-12 19:26:53,963 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 [2021-06-12 19:26:53,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:26:54,014 INFO L225 Difference]: With dead ends: 44514 [2021-06-12 19:26:54,015 INFO L226 Difference]: Without dead ends: 43374 [2021-06-12 19:26:54,017 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 60 SyntacticMatches, 2 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15415 ImplicationChecksByTransitivity, 2685.5ms TimeCoverageRelationStatistics Valid=2427, Invalid=33863, Unknown=0, NotChecked=0, Total=36290 [2021-06-12 19:26:54,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43374 states. [2021-06-12 19:26:54,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43374 to 17204. [2021-06-12 19:26:54,427 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) [2021-06-12 19:26:54,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17204 states to 17204 states and 44491 transitions. [2021-06-12 19:26:54,454 INFO L78 Accepts]: Start accepts. Automaton has 17204 states and 44491 transitions. Word has length 59 [2021-06-12 19:26:54,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:26:54,454 INFO L482 AbstractCegarLoop]: Abstraction has 17204 states and 44491 transitions. [2021-06-12 19:26:54,454 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) [2021-06-12 19:26:54,454 INFO L276 IsEmpty]: Start isEmpty. Operand 17204 states and 44491 transitions. [2021-06-12 19:26:54,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-12 19:26:54,463 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:26:54,463 INFO L472 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:26:54,663 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 541 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1146 [2021-06-12 19:26:54,663 INFO L430 AbstractCegarLoop]: === Iteration 550 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:26:54,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:26:54,664 INFO L82 PathProgramCache]: Analyzing trace with hash 960022850, now seen corresponding path program 331 times [2021-06-12 19:26:54,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:26:54,664 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800669167] [2021-06-12 19:26:54,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:26:54,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:26:54,781 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 54 proven. 124 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:26:54,781 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:26:54,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800669167] [2021-06-12 19:26:54,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800669167] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:26:54,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729892956] [2021-06-12 19:26:54,781 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 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 [2021-06-12 19:26:54,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:26:54,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 19:26:54,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:26:54,894 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 54 proven. 124 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:26:54,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1729892956] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:26:54,894 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:26:54,894 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-06-12 19:26:54,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14773684] [2021-06-12 19:26:54,894 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:26:54,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:26:54,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:26:54,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:26:54,895 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) [2021-06-12 19:26:55,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:26:55,148 INFO L93 Difference]: Finished difference Result 20471 states and 50544 transitions. [2021-06-12 19:26:55,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:26:55,148 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 [2021-06-12 19:26:55,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:26:55,170 INFO L225 Difference]: With dead ends: 20471 [2021-06-12 19:26:55,171 INFO L226 Difference]: Without dead ends: 20426 [2021-06-12 19:26:55,171 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 147.4ms TimeCoverageRelationStatistics Valid=137, Invalid=283, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:26:55,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20426 states. [2021-06-12 19:26:55,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20426 to 17204. [2021-06-12 19:26:55,409 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) [2021-06-12 19:26:55,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17204 states to 17204 states and 44488 transitions. [2021-06-12 19:26:55,437 INFO L78 Accepts]: Start accepts. Automaton has 17204 states and 44488 transitions. Word has length 59 [2021-06-12 19:26:55,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:26:55,437 INFO L482 AbstractCegarLoop]: Abstraction has 17204 states and 44488 transitions. [2021-06-12 19:26:55,437 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) [2021-06-12 19:26:55,437 INFO L276 IsEmpty]: Start isEmpty. Operand 17204 states and 44488 transitions. [2021-06-12 19:26:55,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-12 19:26:55,446 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:26:55,447 INFO L472 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:26:55,647 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1147,542 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:26:55,647 INFO L430 AbstractCegarLoop]: === Iteration 551 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:26:55,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:26:55,647 INFO L82 PathProgramCache]: Analyzing trace with hash -1612541161, now seen corresponding path program 332 times [2021-06-12 19:26:55,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:26:55,647 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832639256] [2021-06-12 19:26:55,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:26:55,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:26:55,784 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 158 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:26:55,784 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:26:55,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832639256] [2021-06-12 19:26:55,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832639256] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:26:55,785 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247772991] [2021-06-12 19:26:55,785 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-12 19:26:55,814 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:26:55,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:26:55,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-12 19:26:55,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:26:55,993 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:26:55,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2021-06-12 19:26:55,995 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:26:55,996 INFO L628 ElimStorePlain]: treesize reduction 20, result has 4.8 percent of original size [2021-06-12 19:26:55,997 INFO L518 ElimStorePlain]: Eliminatee B vanished before elimination [2021-06-12 19:26:55,997 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:26:55,997 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:1 [2021-06-12 19:26:56,004 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 20 proven. 155 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:26:56,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [247772991] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:26:56,004 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:26:56,004 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 22 [2021-06-12 19:26:56,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106978756] [2021-06-12 19:26:56,004 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 19:26:56,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:26:56,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 19:26:56,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:26:56,005 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) [2021-06-12 19:27:03,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:27:03,186 INFO L93 Difference]: Finished difference Result 88879 states and 197085 transitions. [2021-06-12 19:27:03,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 319 states. [2021-06-12 19:27:03,186 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 [2021-06-12 19:27:03,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:27:03,289 INFO L225 Difference]: With dead ends: 88879 [2021-06-12 19:27:03,289 INFO L226 Difference]: Without dead ends: 85405 [2021-06-12 19:27:03,292 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 372 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 317 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45804 ImplicationChecksByTransitivity, 5547.1ms TimeCoverageRelationStatistics Valid=5829, Invalid=95613, Unknown=0, NotChecked=0, Total=101442 [2021-06-12 19:27:03,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85405 states. [2021-06-12 19:27:03,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85405 to 19930. [2021-06-12 19:27:03,838 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) [2021-06-12 19:27:03,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19930 states to 19930 states and 50957 transitions. [2021-06-12 19:27:03,868 INFO L78 Accepts]: Start accepts. Automaton has 19930 states and 50957 transitions. Word has length 59 [2021-06-12 19:27:03,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:27:03,868 INFO L482 AbstractCegarLoop]: Abstraction has 19930 states and 50957 transitions. [2021-06-12 19:27:03,868 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) [2021-06-12 19:27:03,868 INFO L276 IsEmpty]: Start isEmpty. Operand 19930 states and 50957 transitions. [2021-06-12 19:27:03,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-12 19:27:03,877 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:27:03,877 INFO L472 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:27:04,078 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 543 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1154 [2021-06-12 19:27:04,078 INFO L430 AbstractCegarLoop]: === Iteration 552 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:27:04,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:27:04,078 INFO L82 PathProgramCache]: Analyzing trace with hash -1530702308, now seen corresponding path program 333 times [2021-06-12 19:27:04,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:27:04,078 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150848500] [2021-06-12 19:27:04,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:27:04,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:27:04,207 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 61 proven. 117 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:27:04,207 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:27:04,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150848500] [2021-06-12 19:27:04,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150848500] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:27:04,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432877812] [2021-06-12 19:27:04,207 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-12 19:27:04,239 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-12 19:27:04,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:27:04,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 19:27:04,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:27:04,328 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 61 proven. 117 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:27:04,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [432877812] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:27:04,329 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:27:04,329 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2021-06-12 19:27:04,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072730003] [2021-06-12 19:27:04,329 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:27:04,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:27:04,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:27:04,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:27:04,329 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) [2021-06-12 19:27:04,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:27:04,623 INFO L93 Difference]: Finished difference Result 23966 states and 58492 transitions. [2021-06-12 19:27:04,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 19:27:04,623 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 [2021-06-12 19:27:04,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:27:04,648 INFO L225 Difference]: With dead ends: 23966 [2021-06-12 19:27:04,648 INFO L226 Difference]: Without dead ends: 23912 [2021-06-12 19:27:04,648 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 171.4ms TimeCoverageRelationStatistics Valid=161, Invalid=345, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:27:04,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23912 states. [2021-06-12 19:27:04,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23912 to 19930. [2021-06-12 19:27:04,911 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) [2021-06-12 19:27:04,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19930 states to 19930 states and 50954 transitions. [2021-06-12 19:27:04,942 INFO L78 Accepts]: Start accepts. Automaton has 19930 states and 50954 transitions. Word has length 59 [2021-06-12 19:27:04,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:27:04,942 INFO L482 AbstractCegarLoop]: Abstraction has 19930 states and 50954 transitions. [2021-06-12 19:27:04,942 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) [2021-06-12 19:27:04,942 INFO L276 IsEmpty]: Start isEmpty. Operand 19930 states and 50954 transitions. [2021-06-12 19:27:04,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-12 19:27:04,951 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:27:04,951 INFO L472 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:27:05,152 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 544 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1155 [2021-06-12 19:27:05,152 INFO L430 AbstractCegarLoop]: === Iteration 553 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:27:05,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:27:05,152 INFO L82 PathProgramCache]: Analyzing trace with hash -809267123, now seen corresponding path program 334 times [2021-06-12 19:27:05,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:27:05,152 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039646941] [2021-06-12 19:27:05,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:27:05,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:27:05,305 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 158 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:27:05,305 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:27:05,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039646941] [2021-06-12 19:27:05,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039646941] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:27:05,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066618524] [2021-06-12 19:27:05,305 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 [2021-06-12 19:27:05,334 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:27:05,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:27:05,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 36 conjunts are in the unsatisfiable core [2021-06-12 19:27:05,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:27:05,545 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-12 19:27:05,546 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 [2021-06-12 19:27:05,547 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:27:05,548 INFO L628 ElimStorePlain]: treesize reduction 20, result has 4.8 percent of original size [2021-06-12 19:27:05,548 INFO L518 ElimStorePlain]: Eliminatee B vanished before elimination [2021-06-12 19:27:05,549 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:27:05,549 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:1 [2021-06-12 19:27:05,556 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 20 proven. 155 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:27:05,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2066618524] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:27:05,556 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:27:05,556 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 24 [2021-06-12 19:27:05,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963424734] [2021-06-12 19:27:05,556 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 19:27:05,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:27:05,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 19:27:05,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:27:05,556 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) [2021-06-12 19:27:18,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:27:18,338 INFO L93 Difference]: Finished difference Result 96650 states and 218441 transitions. [2021-06-12 19:27:18,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 511 states. [2021-06-12 19:27:18,339 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 [2021-06-12 19:27:18,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:27:18,485 INFO L225 Difference]: With dead ends: 96650 [2021-06-12 19:27:18,485 INFO L226 Difference]: Without dead ends: 93908 [2021-06-12 19:27:18,494 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 562 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 509 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122443 ImplicationChecksByTransitivity, 10539.4ms TimeCoverageRelationStatistics Valid=13119, Invalid=247491, Unknown=0, NotChecked=0, Total=260610 [2021-06-12 19:27:18,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93908 states. [2021-06-12 19:27:19,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93908 to 23705. [2021-06-12 19:27:19,150 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) [2021-06-12 19:27:19,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23705 states to 23705 states and 60046 transitions. [2021-06-12 19:27:19,392 INFO L78 Accepts]: Start accepts. Automaton has 23705 states and 60046 transitions. Word has length 59 [2021-06-12 19:27:19,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:27:19,392 INFO L482 AbstractCegarLoop]: Abstraction has 23705 states and 60046 transitions. [2021-06-12 19:27:19,392 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) [2021-06-12 19:27:19,392 INFO L276 IsEmpty]: Start isEmpty. Operand 23705 states and 60046 transitions. [2021-06-12 19:27:19,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-12 19:27:19,540 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:27:19,540 INFO L472 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:27:19,740 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 545 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1163 [2021-06-12 19:27:19,740 INFO L430 AbstractCegarLoop]: === Iteration 554 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:27:19,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:27:19,740 INFO L82 PathProgramCache]: Analyzing trace with hash 1426088706, now seen corresponding path program 335 times [2021-06-12 19:27:19,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:27:19,740 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272437608] [2021-06-12 19:27:19,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:27:19,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:27:19,880 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 74 proven. 104 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:27:19,880 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:27:19,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272437608] [2021-06-12 19:27:19,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272437608] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:27:19,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702075507] [2021-06-12 19:27:19,880 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 [2021-06-12 19:27:19,911 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-06-12 19:27:19,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:27:19,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 19:27:19,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:27:20,029 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 74 proven. 104 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:27:20,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1702075507] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:27:20,029 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:27:20,029 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 20 [2021-06-12 19:27:20,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224766185] [2021-06-12 19:27:20,029 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 19:27:20,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:27:20,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 19:27:20,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:27:20,030 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) [2021-06-12 19:27:20,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:27:20,515 INFO L93 Difference]: Finished difference Result 29277 states and 70528 transitions. [2021-06-12 19:27:20,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 19:27:20,515 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 [2021-06-12 19:27:20,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:27:20,554 INFO L225 Difference]: With dead ends: 29277 [2021-06-12 19:27:20,554 INFO L226 Difference]: Without dead ends: 29214 [2021-06-12 19:27:20,554 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 230.5ms TimeCoverageRelationStatistics Valid=208, Invalid=548, Unknown=0, NotChecked=0, Total=756 [2021-06-12 19:27:20,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29214 states. [2021-06-12 19:27:20,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29214 to 23705. [2021-06-12 19:27:20,911 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) [2021-06-12 19:27:20,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23705 states to 23705 states and 60043 transitions. [2021-06-12 19:27:20,951 INFO L78 Accepts]: Start accepts. Automaton has 23705 states and 60043 transitions. Word has length 59 [2021-06-12 19:27:20,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:27:20,951 INFO L482 AbstractCegarLoop]: Abstraction has 23705 states and 60043 transitions. [2021-06-12 19:27:20,951 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) [2021-06-12 19:27:20,951 INFO L276 IsEmpty]: Start isEmpty. Operand 23705 states and 60043 transitions. [2021-06-12 19:27:21,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-12 19:27:21,021 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:27:21,021 INFO L472 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:27:21,221 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1164,546 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:27:21,222 INFO L430 AbstractCegarLoop]: === Iteration 555 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:27:21,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:27:21,222 INFO L82 PathProgramCache]: Analyzing trace with hash -2030174377, now seen corresponding path program 336 times [2021-06-12 19:27:21,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:27:21,222 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395433623] [2021-06-12 19:27:21,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:27:21,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:27:21,388 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 161 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:27:21,389 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:27:21,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395433623] [2021-06-12 19:27:21,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395433623] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:27:21,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99642185] [2021-06-12 19:27:21,389 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-12 19:27:21,421 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-06-12 19:27:21,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:27:21,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-12 19:27:21,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:27:21,545 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 161 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:27:21,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99642185] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:27:21,545 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:27:21,545 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 18 [2021-06-12 19:27:21,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522949941] [2021-06-12 19:27:21,546 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:27:21,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:27:21,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:27:21,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=305, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:27:21,546 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) [2021-06-12 19:27:22,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:27:22,561 INFO L93 Difference]: Finished difference Result 33949 states and 78972 transitions. [2021-06-12 19:27:22,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 19:27:22,561 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 [2021-06-12 19:27:22,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:27:22,601 INFO L225 Difference]: With dead ends: 33949 [2021-06-12 19:27:22,601 INFO L226 Difference]: Without dead ends: 30265 [2021-06-12 19:27:22,601 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 57 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 539.7ms TimeCoverageRelationStatistics Valid=273, Invalid=1367, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 19:27:22,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30265 states. [2021-06-12 19:27:22,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30265 to 13219. [2021-06-12 19:27:22,832 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) [2021-06-12 19:27:22,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13219 states to 13219 states and 35153 transitions. [2021-06-12 19:27:22,856 INFO L78 Accepts]: Start accepts. Automaton has 13219 states and 35153 transitions. Word has length 59 [2021-06-12 19:27:22,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:27:22,856 INFO L482 AbstractCegarLoop]: Abstraction has 13219 states and 35153 transitions. [2021-06-12 19:27:22,856 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) [2021-06-12 19:27:22,856 INFO L276 IsEmpty]: Start isEmpty. Operand 13219 states and 35153 transitions. [2021-06-12 19:27:22,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-12 19:27:22,864 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:27:22,864 INFO L472 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:27:23,064 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1173,547 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:27:23,064 INFO L430 AbstractCegarLoop]: === Iteration 556 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:27:23,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:27:23,065 INFO L82 PathProgramCache]: Analyzing trace with hash 2026731402, now seen corresponding path program 161 times [2021-06-12 19:27:23,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:27:23,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632112095] [2021-06-12 19:27:23,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:27:23,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:27:23,141 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 114 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:27:23,141 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:27:23,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632112095] [2021-06-12 19:27:23,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632112095] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:27:23,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957635955] [2021-06-12 19:27:23,141 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 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 [2021-06-12 19:27:23,173 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-06-12 19:27:23,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:27:23,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 19:27:23,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:27:23,342 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 114 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:27:23,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [957635955] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:27:23,343 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:27:23,343 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17] total 20 [2021-06-12 19:27:23,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514908100] [2021-06-12 19:27:23,343 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 19:27:23,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:27:23,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 19:27:23,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=264, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:27:23,343 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) [2021-06-12 19:27:23,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:27:23,752 INFO L93 Difference]: Finished difference Result 15361 states and 39642 transitions. [2021-06-12 19:27:23,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 19:27:23,752 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 [2021-06-12 19:27:23,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:27:23,770 INFO L225 Difference]: With dead ends: 15361 [2021-06-12 19:27:23,771 INFO L226 Difference]: Without dead ends: 15347 [2021-06-12 19:27:23,771 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 134.8ms TimeCoverageRelationStatistics Valid=173, Invalid=333, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:27:23,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15347 states. [2021-06-12 19:27:23,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15347 to 13918. [2021-06-12 19:27:23,958 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) [2021-06-12 19:27:23,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13918 states to 13918 states and 36996 transitions. [2021-06-12 19:27:23,981 INFO L78 Accepts]: Start accepts. Automaton has 13918 states and 36996 transitions. Word has length 59 [2021-06-12 19:27:23,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:27:23,981 INFO L482 AbstractCegarLoop]: Abstraction has 13918 states and 36996 transitions. [2021-06-12 19:27:23,981 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) [2021-06-12 19:27:23,981 INFO L276 IsEmpty]: Start isEmpty. Operand 13918 states and 36996 transitions. [2021-06-12 19:27:23,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-12 19:27:23,989 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:27:23,989 INFO L472 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:27:24,189 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1174,548 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:27:24,189 INFO L430 AbstractCegarLoop]: === Iteration 557 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:27:24,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:27:24,189 INFO L82 PathProgramCache]: Analyzing trace with hash 1404850992, now seen corresponding path program 162 times [2021-06-12 19:27:24,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:27:24,190 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130039704] [2021-06-12 19:27:24,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:27:24,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:27:24,268 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 114 proven. 64 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:27:24,268 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:27:24,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130039704] [2021-06-12 19:27:24,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130039704] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:27:24,268 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157632517] [2021-06-12 19:27:24,268 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 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 [2021-06-12 19:27:24,358 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-06-12 19:27:24,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:27:24,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 19:27:24,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:27:24,449 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 114 proven. 64 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:27:24,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [157632517] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:27:24,449 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:27:24,449 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 12 [2021-06-12 19:27:24,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309127651] [2021-06-12 19:27:24,449 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:27:24,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:27:24,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:27:24,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:27:24,450 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) [2021-06-12 19:27:24,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:27:24,744 INFO L93 Difference]: Finished difference Result 16530 states and 42212 transitions. [2021-06-12 19:27:24,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 19:27:24,745 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 [2021-06-12 19:27:24,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:27:24,764 INFO L225 Difference]: With dead ends: 16530 [2021-06-12 19:27:24,765 INFO L226 Difference]: Without dead ends: 16530 [2021-06-12 19:27:24,765 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 137.2ms TimeCoverageRelationStatistics Valid=172, Invalid=248, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:27:24,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16530 states. [2021-06-12 19:27:24,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16530 to 13921. [2021-06-12 19:27:24,965 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) [2021-06-12 19:27:24,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13921 states to 13921 states and 37005 transitions. [2021-06-12 19:27:24,989 INFO L78 Accepts]: Start accepts. Automaton has 13921 states and 37005 transitions. Word has length 59 [2021-06-12 19:27:24,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:27:24,989 INFO L482 AbstractCegarLoop]: Abstraction has 13921 states and 37005 transitions. [2021-06-12 19:27:24,989 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) [2021-06-12 19:27:24,989 INFO L276 IsEmpty]: Start isEmpty. Operand 13921 states and 37005 transitions. [2021-06-12 19:27:24,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-12 19:27:24,997 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:27:24,997 INFO L472 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:27:25,197 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1176,549 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:27:25,197 INFO L430 AbstractCegarLoop]: === Iteration 558 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:27:25,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:27:25,198 INFO L82 PathProgramCache]: Analyzing trace with hash -232721464, now seen corresponding path program 163 times [2021-06-12 19:27:25,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:27:25,198 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501777383] [2021-06-12 19:27:25,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:27:25,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:27:25,283 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 115 proven. 63 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:27:25,283 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:27:25,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501777383] [2021-06-12 19:27:25,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501777383] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:27:25,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985777816] [2021-06-12 19:27:25,284 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 [2021-06-12 19:27:25,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:27:25,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:27:25,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:27:25,424 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 116 proven. 62 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:27:25,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [985777816] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:27:25,425 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:27:25,425 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 15 [2021-06-12 19:27:25,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878111154] [2021-06-12 19:27:25,425 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:27:25,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:27:25,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:27:25,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:27:25,425 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) [2021-06-12 19:27:26,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:27:26,003 INFO L93 Difference]: Finished difference Result 15683 states and 40328 transitions. [2021-06-12 19:27:26,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-12 19:27:26,003 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 [2021-06-12 19:27:26,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:27:26,024 INFO L225 Difference]: With dead ends: 15683 [2021-06-12 19:27:26,024 INFO L226 Difference]: Without dead ends: 15683 [2021-06-12 19:27:26,024 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 300.4ms TimeCoverageRelationStatistics Valid=412, Invalid=710, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 19:27:26,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15683 states. [2021-06-12 19:27:26,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15683 to 13639. [2021-06-12 19:27:26,225 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) [2021-06-12 19:27:26,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13639 states to 13639 states and 36315 transitions. [2021-06-12 19:27:26,248 INFO L78 Accepts]: Start accepts. Automaton has 13639 states and 36315 transitions. Word has length 59 [2021-06-12 19:27:26,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:27:26,248 INFO L482 AbstractCegarLoop]: Abstraction has 13639 states and 36315 transitions. [2021-06-12 19:27:26,248 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) [2021-06-12 19:27:26,248 INFO L276 IsEmpty]: Start isEmpty. Operand 13639 states and 36315 transitions. [2021-06-12 19:27:26,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-06-12 19:27:26,256 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:27:26,256 INFO L472 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:27:26,456 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 550 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1177 [2021-06-12 19:27:26,456 INFO L430 AbstractCegarLoop]: === Iteration 559 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:27:26,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:27:26,456 INFO L82 PathProgramCache]: Analyzing trace with hash 1702913116, now seen corresponding path program 337 times [2021-06-12 19:27:26,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:27:26,457 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081880228] [2021-06-12 19:27:26,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:27:26,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:27:26,611 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 94 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:27:26,611 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:27:26,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081880228] [2021-06-12 19:27:26,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081880228] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:27:26,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118384113] [2021-06-12 19:27:26,611 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-12 19:27:26,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:27:26,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-12 19:27:26,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:27:26,730 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 94 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:27:26,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1118384113] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:27:26,730 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:27:26,730 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2021-06-12 19:27:26,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524951182] [2021-06-12 19:27:26,730 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:27:26,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:27:26,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:27:26,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:27:26,731 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) [2021-06-12 19:27:27,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:27:27,125 INFO L93 Difference]: Finished difference Result 15972 states and 40554 transitions. [2021-06-12 19:27:27,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 19:27:27,126 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 [2021-06-12 19:27:27,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:27:27,146 INFO L225 Difference]: With dead ends: 15972 [2021-06-12 19:27:27,146 INFO L226 Difference]: Without dead ends: 15898 [2021-06-12 19:27:27,146 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 221.5ms TimeCoverageRelationStatistics Valid=215, Invalid=487, Unknown=0, NotChecked=0, Total=702 [2021-06-12 19:27:27,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15898 states. [2021-06-12 19:27:27,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15898 to 13648. [2021-06-12 19:27:27,381 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) [2021-06-12 19:27:27,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13648 states to 13648 states and 36329 transitions. [2021-06-12 19:27:27,405 INFO L78 Accepts]: Start accepts. Automaton has 13648 states and 36329 transitions. Word has length 59 [2021-06-12 19:27:27,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:27:27,405 INFO L482 AbstractCegarLoop]: Abstraction has 13648 states and 36329 transitions. [2021-06-12 19:27:27,405 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) [2021-06-12 19:27:27,405 INFO L276 IsEmpty]: Start isEmpty. Operand 13648 states and 36329 transitions. [2021-06-12 19:27:27,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-06-12 19:27:27,414 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:27:27,414 INFO L472 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:27:27,614 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1180,551 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:27:27,614 INFO L430 AbstractCegarLoop]: === Iteration 560 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:27:27,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:27:27,615 INFO L82 PathProgramCache]: Analyzing trace with hash -911313595, now seen corresponding path program 338 times [2021-06-12 19:27:27,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:27:27,615 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082733789] [2021-06-12 19:27:27,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:27:27,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:27:27,691 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 0 proven. 199 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:27:27,691 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:27:27,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082733789] [2021-06-12 19:27:27,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082733789] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:27:27,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956373239] [2021-06-12 19:27:27,692 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 [2021-06-12 19:27:27,721 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:27:27,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:27:27,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:27:27,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:27:28,120 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 92 proven. 109 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:27:28,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [956373239] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:27:28,120 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:27:28,120 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 19] total 28 [2021-06-12 19:27:28,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280236231] [2021-06-12 19:27:28,120 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-12 19:27:28,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:27:28,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-12 19:27:28,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=685, Unknown=0, NotChecked=0, Total=812 [2021-06-12 19:27:28,121 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) [2021-06-12 19:27:29,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:27:29,998 INFO L93 Difference]: Finished difference Result 17222 states and 43443 transitions. [2021-06-12 19:27:29,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-12 19:27:29,998 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 [2021-06-12 19:27:29,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:27:30,017 INFO L225 Difference]: With dead ends: 17222 [2021-06-12 19:27:30,017 INFO L226 Difference]: Without dead ends: 17184 [2021-06-12 19:27:30,018 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1198 ImplicationChecksByTransitivity, 1029.8ms TimeCoverageRelationStatistics Valid=971, Invalid=4141, Unknown=0, NotChecked=0, Total=5112 [2021-06-12 19:27:30,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17184 states. [2021-06-12 19:27:30,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17184 to 14862. [2021-06-12 19:27:30,209 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) [2021-06-12 19:27:30,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14862 states to 14862 states and 38979 transitions. [2021-06-12 19:27:30,234 INFO L78 Accepts]: Start accepts. Automaton has 14862 states and 38979 transitions. Word has length 62 [2021-06-12 19:27:30,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:27:30,235 INFO L482 AbstractCegarLoop]: Abstraction has 14862 states and 38979 transitions. [2021-06-12 19:27:30,235 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) [2021-06-12 19:27:30,235 INFO L276 IsEmpty]: Start isEmpty. Operand 14862 states and 38979 transitions. [2021-06-12 19:27:30,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-06-12 19:27:30,244 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:27:30,244 INFO L472 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:27:30,444 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 552 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1190 [2021-06-12 19:27:30,445 INFO L430 AbstractCegarLoop]: === Iteration 561 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:27:30,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:27:30,445 INFO L82 PathProgramCache]: Analyzing trace with hash 2125604839, now seen corresponding path program 339 times [2021-06-12 19:27:30,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:27:30,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866861975] [2021-06-12 19:27:30,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:27:30,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:27:30,520 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 0 proven. 194 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-12 19:27:30,520 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:27:30,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866861975] [2021-06-12 19:27:30,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866861975] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:27:30,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135760404] [2021-06-12 19:27:30,520 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 [2021-06-12 19:27:30,554 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-06-12 19:27:30,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:27:30,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-12 19:27:30,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:27:30,633 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 0 proven. 194 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-12 19:27:30,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [135760404] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:27:30,633 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:27:30,633 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-12 19:27:30,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974597229] [2021-06-12 19:27:30,633 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:27:30,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:27:30,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:27:30,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:27:30,634 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) [2021-06-12 19:27:31,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:27:31,051 INFO L93 Difference]: Finished difference Result 16116 states and 41321 transitions. [2021-06-12 19:27:31,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:27:31,052 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 [2021-06-12 19:27:31,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:27:31,070 INFO L225 Difference]: With dead ends: 16116 [2021-06-12 19:27:31,070 INFO L226 Difference]: Without dead ends: 16081 [2021-06-12 19:27:31,070 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 68 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 62.2ms TimeCoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:27:31,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16081 states. [2021-06-12 19:27:31,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16081 to 14880. [2021-06-12 19:27:31,259 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) [2021-06-12 19:27:31,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14880 states to 14880 states and 39017 transitions. [2021-06-12 19:27:31,286 INFO L78 Accepts]: Start accepts. Automaton has 14880 states and 39017 transitions. Word has length 62 [2021-06-12 19:27:31,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:27:31,286 INFO L482 AbstractCegarLoop]: Abstraction has 14880 states and 39017 transitions. [2021-06-12 19:27:31,286 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) [2021-06-12 19:27:31,286 INFO L276 IsEmpty]: Start isEmpty. Operand 14880 states and 39017 transitions. [2021-06-12 19:27:31,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-06-12 19:27:31,296 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:27:31,296 INFO L472 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:27:31,496 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1191,553 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:27:31,497 INFO L430 AbstractCegarLoop]: === Iteration 562 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:27:31,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:27:31,497 INFO L82 PathProgramCache]: Analyzing trace with hash -845583229, now seen corresponding path program 340 times [2021-06-12 19:27:31,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:27:31,497 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078683241] [2021-06-12 19:27:31,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:27:31,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:27:31,575 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 0 proven. 194 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-12 19:27:31,575 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:27:31,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078683241] [2021-06-12 19:27:31,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078683241] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:27:31,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440388377] [2021-06-12 19:27:31,575 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 [2021-06-12 19:27:31,604 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:27:31,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:27:31,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-12 19:27:31,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:27:31,685 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 0 proven. 194 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-12 19:27:31,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [440388377] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:27:31,685 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:27:31,685 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-12 19:27:31,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38323590] [2021-06-12 19:27:31,685 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:27:31,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:27:31,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:27:31,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:27:31,685 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) [2021-06-12 19:27:32,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:27:32,102 INFO L93 Difference]: Finished difference Result 16292 states and 41632 transitions. [2021-06-12 19:27:32,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:27:32,103 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 [2021-06-12 19:27:32,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:27:32,122 INFO L225 Difference]: With dead ends: 16292 [2021-06-12 19:27:32,123 INFO L226 Difference]: Without dead ends: 16254 [2021-06-12 19:27:32,123 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 68 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 64.6ms TimeCoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:27:32,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16254 states. [2021-06-12 19:27:32,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16254 to 14979. [2021-06-12 19:27:32,350 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) [2021-06-12 19:27:32,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14979 states to 14979 states and 39198 transitions. [2021-06-12 19:27:32,375 INFO L78 Accepts]: Start accepts. Automaton has 14979 states and 39198 transitions. Word has length 62 [2021-06-12 19:27:32,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:27:32,375 INFO L482 AbstractCegarLoop]: Abstraction has 14979 states and 39198 transitions. [2021-06-12 19:27:32,375 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) [2021-06-12 19:27:32,375 INFO L276 IsEmpty]: Start isEmpty. Operand 14979 states and 39198 transitions. [2021-06-12 19:27:32,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-06-12 19:27:32,384 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:27:32,385 INFO L472 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:27:32,585 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1192,554 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:27:32,585 INFO L430 AbstractCegarLoop]: === Iteration 563 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:27:32,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:27:32,585 INFO L82 PathProgramCache]: Analyzing trace with hash -528313753, now seen corresponding path program 341 times [2021-06-12 19:27:32,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:27:32,585 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417553699] [2021-06-12 19:27:32,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:27:32,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:27:32,660 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 0 proven. 194 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-12 19:27:32,660 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:27:32,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417553699] [2021-06-12 19:27:32,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417553699] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:27:32,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986421616] [2021-06-12 19:27:32,660 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 [2021-06-12 19:27:32,694 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2021-06-12 19:27:32,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:27:32,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-12 19:27:32,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:27:32,772 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 0 proven. 194 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-12 19:27:32,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1986421616] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:27:32,772 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:27:32,772 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-12 19:27:32,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917423094] [2021-06-12 19:27:32,772 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:27:32,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:27:32,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:27:32,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:27:32,773 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) [2021-06-12 19:27:33,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:27:33,178 INFO L93 Difference]: Finished difference Result 16320 states and 41716 transitions. [2021-06-12 19:27:33,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:27:33,179 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 [2021-06-12 19:27:33,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:27:33,197 INFO L225 Difference]: With dead ends: 16320 [2021-06-12 19:27:33,197 INFO L226 Difference]: Without dead ends: 16260 [2021-06-12 19:27:33,198 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 68 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 61.9ms TimeCoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:27:33,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16260 states. [2021-06-12 19:27:33,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16260 to 15051. [2021-06-12 19:27:33,379 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) [2021-06-12 19:27:33,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15051 states to 15051 states and 39332 transitions. [2021-06-12 19:27:33,404 INFO L78 Accepts]: Start accepts. Automaton has 15051 states and 39332 transitions. Word has length 62 [2021-06-12 19:27:33,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:27:33,404 INFO L482 AbstractCegarLoop]: Abstraction has 15051 states and 39332 transitions. [2021-06-12 19:27:33,404 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) [2021-06-12 19:27:33,404 INFO L276 IsEmpty]: Start isEmpty. Operand 15051 states and 39332 transitions. [2021-06-12 19:27:33,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-06-12 19:27:33,413 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:27:33,413 INFO L472 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:27:33,613 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1193,555 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:27:33,614 INFO L430 AbstractCegarLoop]: === Iteration 564 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:27:33,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:27:33,614 INFO L82 PathProgramCache]: Analyzing trace with hash -1976372733, now seen corresponding path program 342 times [2021-06-12 19:27:33,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:27:33,614 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093333211] [2021-06-12 19:27:33,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:27:33,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:27:33,708 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 0 proven. 194 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-12 19:27:33,708 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:27:33,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093333211] [2021-06-12 19:27:33,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1093333211] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:27:33,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319640242] [2021-06-12 19:27:33,708 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 [2021-06-12 19:27:33,755 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-06-12 19:27:33,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:27:33,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:27:33,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:27:33,999 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 44 proven. 155 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:27:33,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319640242] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:27:33,999 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:27:33,999 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-06-12 19:27:33,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592590595] [2021-06-12 19:27:33,999 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 19:27:33,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:27:34,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 19:27:34,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:27:34,000 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) [2021-06-12 19:27:35,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:27:35,231 INFO L93 Difference]: Finished difference Result 22065 states and 52580 transitions. [2021-06-12 19:27:35,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-12 19:27:35,231 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 [2021-06-12 19:27:35,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:27:35,252 INFO L225 Difference]: With dead ends: 22065 [2021-06-12 19:27:35,252 INFO L226 Difference]: Without dead ends: 21976 [2021-06-12 19:27:35,252 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 531.6ms TimeCoverageRelationStatistics Valid=390, Invalid=1866, Unknown=0, NotChecked=0, Total=2256 [2021-06-12 19:27:35,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21976 states. [2021-06-12 19:27:35,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21976 to 15162. [2021-06-12 19:27:35,463 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) [2021-06-12 19:27:35,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15162 states to 15162 states and 39546 transitions. [2021-06-12 19:27:35,488 INFO L78 Accepts]: Start accepts. Automaton has 15162 states and 39546 transitions. Word has length 62 [2021-06-12 19:27:35,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:27:35,488 INFO L482 AbstractCegarLoop]: Abstraction has 15162 states and 39546 transitions. [2021-06-12 19:27:35,488 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) [2021-06-12 19:27:35,489 INFO L276 IsEmpty]: Start isEmpty. Operand 15162 states and 39546 transitions. [2021-06-12 19:27:35,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-06-12 19:27:35,498 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:27:35,498 INFO L472 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:27:35,698 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1194,556 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:27:35,698 INFO L430 AbstractCegarLoop]: === Iteration 565 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:27:35,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:27:35,699 INFO L82 PathProgramCache]: Analyzing trace with hash 1845042407, now seen corresponding path program 343 times [2021-06-12 19:27:35,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:27:35,699 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389737340] [2021-06-12 19:27:35,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:27:35,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:27:35,787 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 0 proven. 194 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-12 19:27:35,787 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:27:35,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389737340] [2021-06-12 19:27:35,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389737340] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:27:35,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [346737717] [2021-06-12 19:27:35,787 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 [2021-06-12 19:27:35,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:27:35,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-12 19:27:35,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:27:35,917 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 0 proven. 194 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-12 19:27:35,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [346737717] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:27:35,917 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:27:35,917 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-12 19:27:35,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439567513] [2021-06-12 19:27:35,917 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:27:35,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:27:35,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:27:35,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:27:35,918 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) [2021-06-12 19:27:36,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:27:36,331 INFO L93 Difference]: Finished difference Result 16450 states and 42034 transitions. [2021-06-12 19:27:36,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:27:36,332 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 [2021-06-12 19:27:36,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:27:36,351 INFO L225 Difference]: With dead ends: 16450 [2021-06-12 19:27:36,351 INFO L226 Difference]: Without dead ends: 16412 [2021-06-12 19:27:36,351 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 68 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 72.0ms TimeCoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:27:36,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16412 states. [2021-06-12 19:27:36,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16412 to 15288. [2021-06-12 19:27:36,541 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) [2021-06-12 19:27:36,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15288 states to 15288 states and 39782 transitions. [2021-06-12 19:27:36,567 INFO L78 Accepts]: Start accepts. Automaton has 15288 states and 39782 transitions. Word has length 62 [2021-06-12 19:27:36,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:27:36,567 INFO L482 AbstractCegarLoop]: Abstraction has 15288 states and 39782 transitions. [2021-06-12 19:27:36,567 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) [2021-06-12 19:27:36,567 INFO L276 IsEmpty]: Start isEmpty. Operand 15288 states and 39782 transitions. [2021-06-12 19:27:36,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-06-12 19:27:36,577 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:27:36,577 INFO L472 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:27:36,777 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1195,557 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:27:36,778 INFO L430 AbstractCegarLoop]: === Iteration 566 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:27:36,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:27:36,778 INFO L82 PathProgramCache]: Analyzing trace with hash -1074636925, now seen corresponding path program 344 times [2021-06-12 19:27:36,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:27:36,778 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679270330] [2021-06-12 19:27:36,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:27:36,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:27:36,855 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 0 proven. 194 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-12 19:27:36,855 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:27:36,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679270330] [2021-06-12 19:27:36,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679270330] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:27:36,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099846547] [2021-06-12 19:27:36,855 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 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 [2021-06-12 19:27:36,884 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:27:36,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:27:36,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:27:36,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:27:37,102 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 48 proven. 151 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:27:37,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1099846547] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:27:37,103 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:27:37,103 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-06-12 19:27:37,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117863336] [2021-06-12 19:27:37,103 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 19:27:37,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:27:37,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 19:27:37,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:27:37,103 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) [2021-06-12 19:27:38,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:27:38,349 INFO L93 Difference]: Finished difference Result 22675 states and 53617 transitions. [2021-06-12 19:27:38,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-12 19:27:38,350 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 [2021-06-12 19:27:38,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:27:38,374 INFO L225 Difference]: With dead ends: 22675 [2021-06-12 19:27:38,374 INFO L226 Difference]: Without dead ends: 22612 [2021-06-12 19:27:38,374 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 415 ImplicationChecksByTransitivity, 517.3ms TimeCoverageRelationStatistics Valid=390, Invalid=1866, Unknown=0, NotChecked=0, Total=2256 [2021-06-12 19:27:38,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22612 states. [2021-06-12 19:27:38,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22612 to 15453. [2021-06-12 19:27:38,595 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) [2021-06-12 19:27:38,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15453 states to 15453 states and 40104 transitions. [2021-06-12 19:27:38,620 INFO L78 Accepts]: Start accepts. Automaton has 15453 states and 40104 transitions. Word has length 62 [2021-06-12 19:27:38,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:27:38,620 INFO L482 AbstractCegarLoop]: Abstraction has 15453 states and 40104 transitions. [2021-06-12 19:27:38,620 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) [2021-06-12 19:27:38,620 INFO L276 IsEmpty]: Start isEmpty. Operand 15453 states and 40104 transitions. [2021-06-12 19:27:38,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-06-12 19:27:38,630 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:27:38,630 INFO L472 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:27:38,830 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1196,558 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:27:38,830 INFO L430 AbstractCegarLoop]: === Iteration 567 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:27:38,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:27:38,830 INFO L82 PathProgramCache]: Analyzing trace with hash 436062055, now seen corresponding path program 345 times [2021-06-12 19:27:38,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:27:38,831 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264965426] [2021-06-12 19:27:38,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:27:38,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:27:38,907 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 0 proven. 194 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-12 19:27:38,908 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:27:38,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264965426] [2021-06-12 19:27:38,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264965426] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:27:38,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847019682] [2021-06-12 19:27:38,908 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 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 [2021-06-12 19:27:38,942 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-06-12 19:27:38,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:27:38,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-12 19:27:38,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:27:39,160 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 59 proven. 140 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:27:39,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [847019682] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:27:39,160 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:27:39,160 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-06-12 19:27:39,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252406574] [2021-06-12 19:27:39,161 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 19:27:39,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:27:39,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 19:27:39,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:27:39,161 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) [2021-06-12 19:27:40,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:27:40,367 INFO L93 Difference]: Finished difference Result 23187 states and 55034 transitions. [2021-06-12 19:27:40,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-12 19:27:40,367 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 [2021-06-12 19:27:40,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:27:40,394 INFO L225 Difference]: With dead ends: 23187 [2021-06-12 19:27:40,394 INFO L226 Difference]: Without dead ends: 23122 [2021-06-12 19:27:40,394 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 525.2ms TimeCoverageRelationStatistics Valid=390, Invalid=1866, Unknown=0, NotChecked=0, Total=2256 [2021-06-12 19:27:40,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23122 states. [2021-06-12 19:27:40,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23122 to 16198. [2021-06-12 19:27:40,629 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) [2021-06-12 19:27:40,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16198 states to 16198 states and 42091 transitions. [2021-06-12 19:27:40,759 INFO L78 Accepts]: Start accepts. Automaton has 16198 states and 42091 transitions. Word has length 62 [2021-06-12 19:27:40,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:27:40,759 INFO L482 AbstractCegarLoop]: Abstraction has 16198 states and 42091 transitions. [2021-06-12 19:27:40,759 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) [2021-06-12 19:27:40,759 INFO L276 IsEmpty]: Start isEmpty. Operand 16198 states and 42091 transitions. [2021-06-12 19:27:40,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-06-12 19:27:40,768 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:27:40,768 INFO L472 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:27:40,969 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1197,559 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:27:40,969 INFO L430 AbstractCegarLoop]: === Iteration 568 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:27:40,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:27:40,969 INFO L82 PathProgramCache]: Analyzing trace with hash -1292919549, now seen corresponding path program 346 times [2021-06-12 19:27:40,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:27:40,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323470214] [2021-06-12 19:27:40,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:27:40,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:27:41,045 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-12 19:27:41,045 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:27:41,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323470214] [2021-06-12 19:27:41,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323470214] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:27:41,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714717980] [2021-06-12 19:27:41,045 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 [2021-06-12 19:27:41,074 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:27:41,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:27:41,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-12 19:27:41,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:27:41,160 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-12 19:27:41,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1714717980] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:27:41,161 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:27:41,161 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-12 19:27:41,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793965643] [2021-06-12 19:27:41,161 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-12 19:27:41,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:27:41,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-12 19:27:41,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:27:41,161 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) [2021-06-12 19:27:41,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:27:41,577 INFO L93 Difference]: Finished difference Result 18245 states and 46468 transitions. [2021-06-12 19:27:41,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-12 19:27:41,577 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 [2021-06-12 19:27:41,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:27:41,599 INFO L225 Difference]: With dead ends: 18245 [2021-06-12 19:27:41,599 INFO L226 Difference]: Without dead ends: 18220 [2021-06-12 19:27:41,599 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 68 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 63.2ms TimeCoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-06-12 19:27:41,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18220 states. [2021-06-12 19:27:41,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18220 to 16907. [2021-06-12 19:27:41,809 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) [2021-06-12 19:27:41,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16907 states to 16907 states and 43863 transitions. [2021-06-12 19:27:41,837 INFO L78 Accepts]: Start accepts. Automaton has 16907 states and 43863 transitions. Word has length 62 [2021-06-12 19:27:41,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:27:41,837 INFO L482 AbstractCegarLoop]: Abstraction has 16907 states and 43863 transitions. [2021-06-12 19:27:41,837 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) [2021-06-12 19:27:41,837 INFO L276 IsEmpty]: Start isEmpty. Operand 16907 states and 43863 transitions. [2021-06-12 19:27:41,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-12 19:27:41,848 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:27:41,848 INFO L472 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:27:42,048 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 560 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1198 [2021-06-12 19:27:42,049 INFO L430 AbstractCegarLoop]: === Iteration 569 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:27:42,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:27:42,049 INFO L82 PathProgramCache]: Analyzing trace with hash 1959224392, now seen corresponding path program 164 times [2021-06-12 19:27:42,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:27:42,049 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757747493] [2021-06-12 19:27:42,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:27:42,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:27:42,256 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 9 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:27:42,256 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:27:42,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757747493] [2021-06-12 19:27:42,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757747493] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:27:42,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178247634] [2021-06-12 19:27:42,256 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 [2021-06-12 19:27:42,286 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:27:42,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:27:42,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-12 19:27:42,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:27:43,401 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 93 proven. 133 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:27:43,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1178247634] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:27:43,401 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:27:43,401 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 23] total 41 [2021-06-12 19:27:43,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127625340] [2021-06-12 19:27:43,402 INFO L462 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-06-12 19:27:43,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:27:43,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-06-12 19:27:43,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=1563, Unknown=0, NotChecked=0, Total=1722 [2021-06-12 19:27:43,402 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) [2021-06-12 19:28:06,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:28:06,303 INFO L93 Difference]: Finished difference Result 40647 states and 93712 transitions. [2021-06-12 19:28:06,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 408 states. [2021-06-12 19:28:06,304 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 [2021-06-12 19:28:06,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:28:06,348 INFO L225 Difference]: With dead ends: 40647 [2021-06-12 19:28:06,348 INFO L226 Difference]: Without dead ends: 39783 [2021-06-12 19:28:06,355 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 477 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 433 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80537 ImplicationChecksByTransitivity, 20174.4ms TimeCoverageRelationStatistics Valid=22109, Invalid=166681, Unknown=0, NotChecked=0, Total=188790 [2021-06-12 19:28:06,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39783 states. [2021-06-12 19:28:06,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39783 to 20292. [2021-06-12 19:28:06,670 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) [2021-06-12 19:28:06,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20292 states to 20292 states and 53508 transitions. [2021-06-12 19:28:06,703 INFO L78 Accepts]: Start accepts. Automaton has 20292 states and 53508 transitions. Word has length 65 [2021-06-12 19:28:06,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:28:06,703 INFO L482 AbstractCegarLoop]: Abstraction has 20292 states and 53508 transitions. [2021-06-12 19:28:06,704 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) [2021-06-12 19:28:06,704 INFO L276 IsEmpty]: Start isEmpty. Operand 20292 states and 53508 transitions. [2021-06-12 19:28:06,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-12 19:28:06,718 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:28:06,718 INFO L472 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:28:06,919 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 561 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1199 [2021-06-12 19:28:06,919 INFO L430 AbstractCegarLoop]: === Iteration 570 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:28:06,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:28:06,919 INFO L82 PathProgramCache]: Analyzing trace with hash -1290275768, now seen corresponding path program 347 times [2021-06-12 19:28:06,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:28:06,919 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212724714] [2021-06-12 19:28:06,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:28:06,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:28:07,137 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 19 proven. 207 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:28:07,138 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:28:07,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212724714] [2021-06-12 19:28:07,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212724714] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:28:07,138 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3969965] [2021-06-12 19:28:07,138 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-12 19:28:07,173 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-06-12 19:28:07,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:28:07,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-12 19:28:07,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:28:07,558 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 17 proven. 209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:28:07,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [3969965] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:28:07,558 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:28:07,558 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 28 [2021-06-12 19:28:07,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796734836] [2021-06-12 19:28:07,558 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-12 19:28:07,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:28:07,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-12 19:28:07,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=739, Unknown=0, NotChecked=0, Total=812 [2021-06-12 19:28:07,559 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) [2021-06-12 19:28:09,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:28:09,204 INFO L93 Difference]: Finished difference Result 20618 states and 54021 transitions. [2021-06-12 19:28:09,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 19:28:09,204 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 [2021-06-12 19:28:09,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:28:09,228 INFO L225 Difference]: With dead ends: 20618 [2021-06-12 19:28:09,228 INFO L226 Difference]: Without dead ends: 20502 [2021-06-12 19:28:09,229 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 431.7ms TimeCoverageRelationStatistics Valid=73, Invalid=739, Unknown=0, NotChecked=0, Total=812 [2021-06-12 19:28:09,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20502 states. [2021-06-12 19:28:09,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20502 to 20276. [2021-06-12 19:28:09,496 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) [2021-06-12 19:28:09,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20276 states to 20276 states and 53443 transitions. [2021-06-12 19:28:09,530 INFO L78 Accepts]: Start accepts. Automaton has 20276 states and 53443 transitions. Word has length 65 [2021-06-12 19:28:09,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:28:09,530 INFO L482 AbstractCegarLoop]: Abstraction has 20276 states and 53443 transitions. [2021-06-12 19:28:09,530 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) [2021-06-12 19:28:09,530 INFO L276 IsEmpty]: Start isEmpty. Operand 20276 states and 53443 transitions. [2021-06-12 19:28:09,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-12 19:28:09,544 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:28:09,544 INFO L472 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:28:09,744 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 562 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1212 [2021-06-12 19:28:09,744 INFO L430 AbstractCegarLoop]: === Iteration 571 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:28:09,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:28:09,745 INFO L82 PathProgramCache]: Analyzing trace with hash 708589307, now seen corresponding path program 165 times [2021-06-12 19:28:09,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:28:09,745 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419872655] [2021-06-12 19:28:09,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:28:09,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:28:09,832 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 104 proven. 123 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:28:09,832 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:28:09,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419872655] [2021-06-12 19:28:09,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419872655] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:28:09,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664602927] [2021-06-12 19:28:09,833 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 [2021-06-12 19:28:09,865 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-12 19:28:09,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:28:09,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:28:09,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:28:09,965 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 105 proven. 123 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:28:09,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1664602927] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:28:09,965 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:28:09,965 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 13 [2021-06-12 19:28:09,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949019466] [2021-06-12 19:28:09,965 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:28:09,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:28:09,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:28:09,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:28:09,966 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) [2021-06-12 19:28:10,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:28:10,197 INFO L93 Difference]: Finished difference Result 27245 states and 66968 transitions. [2021-06-12 19:28:10,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:28:10,198 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 [2021-06-12 19:28:10,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:28:10,235 INFO L225 Difference]: With dead ends: 27245 [2021-06-12 19:28:10,235 INFO L226 Difference]: Without dead ends: 27235 [2021-06-12 19:28:10,235 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 94.2ms TimeCoverageRelationStatistics Valid=91, Invalid=149, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:28:10,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27235 states. [2021-06-12 19:28:10,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27235 to 20359. [2021-06-12 19:28:10,545 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) [2021-06-12 19:28:10,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20359 states to 20359 states and 53711 transitions. [2021-06-12 19:28:10,577 INFO L78 Accepts]: Start accepts. Automaton has 20359 states and 53711 transitions. Word has length 65 [2021-06-12 19:28:10,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:28:10,577 INFO L482 AbstractCegarLoop]: Abstraction has 20359 states and 53711 transitions. [2021-06-12 19:28:10,577 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) [2021-06-12 19:28:10,577 INFO L276 IsEmpty]: Start isEmpty. Operand 20359 states and 53711 transitions. [2021-06-12 19:28:10,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-12 19:28:10,591 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:28:10,591 INFO L472 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:28:10,791 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 563 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1213 [2021-06-12 19:28:10,791 INFO L430 AbstractCegarLoop]: === Iteration 572 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:28:10,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:28:10,791 INFO L82 PathProgramCache]: Analyzing trace with hash -248603333, now seen corresponding path program 166 times [2021-06-12 19:28:10,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:28:10,792 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382551099] [2021-06-12 19:28:10,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:28:10,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:28:10,877 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 128 proven. 99 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:28:10,877 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:28:10,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382551099] [2021-06-12 19:28:10,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382551099] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:28:10,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872485210] [2021-06-12 19:28:10,877 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 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 [2021-06-12 19:28:10,907 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:28:10,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:28:10,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:28:10,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:28:11,010 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 129 proven. 99 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:28:11,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1872485210] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:28:11,011 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:28:11,011 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 13 [2021-06-12 19:28:11,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356206448] [2021-06-12 19:28:11,011 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:28:11,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:28:11,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:28:11,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=110, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:28:11,011 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) [2021-06-12 19:28:11,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:28:11,264 INFO L93 Difference]: Finished difference Result 30078 states and 74504 transitions. [2021-06-12 19:28:11,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:28:11,264 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 [2021-06-12 19:28:11,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:28:11,306 INFO L225 Difference]: With dead ends: 30078 [2021-06-12 19:28:11,307 INFO L226 Difference]: Without dead ends: 30078 [2021-06-12 19:28:11,307 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 89.9ms TimeCoverageRelationStatistics Valid=86, Invalid=124, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:28:11,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30078 states. [2021-06-12 19:28:11,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30078 to 22013. [2021-06-12 19:28:11,718 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) [2021-06-12 19:28:11,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22013 states to 22013 states and 58759 transitions. [2021-06-12 19:28:11,757 INFO L78 Accepts]: Start accepts. Automaton has 22013 states and 58759 transitions. Word has length 65 [2021-06-12 19:28:11,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:28:11,757 INFO L482 AbstractCegarLoop]: Abstraction has 22013 states and 58759 transitions. [2021-06-12 19:28:11,757 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) [2021-06-12 19:28:11,757 INFO L276 IsEmpty]: Start isEmpty. Operand 22013 states and 58759 transitions. [2021-06-12 19:28:11,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-12 19:28:11,771 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:28:11,771 INFO L472 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:28:11,971 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 564 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1216 [2021-06-12 19:28:11,972 INFO L430 AbstractCegarLoop]: === Iteration 573 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:28:11,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:28:11,972 INFO L82 PathProgramCache]: Analyzing trace with hash -782468709, now seen corresponding path program 348 times [2021-06-12 19:28:11,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:28:11,972 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25751329] [2021-06-12 19:28:11,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:28:11,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:28:12,059 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 111 proven. 116 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:28:12,060 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:28:12,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25751329] [2021-06-12 19:28:12,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25751329] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:28:12,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033021685] [2021-06-12 19:28:12,060 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 [2021-06-12 19:28:12,094 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-06-12 19:28:12,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:28:12,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:28:12,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:28:12,188 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 111 proven. 116 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:28:12,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1033021685] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:28:12,188 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:28:12,188 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-06-12 19:28:12,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216073794] [2021-06-12 19:28:12,188 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:28:12,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:28:12,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:28:12,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:28:12,189 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) [2021-06-12 19:28:12,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:28:12,493 INFO L93 Difference]: Finished difference Result 23642 states and 61469 transitions. [2021-06-12 19:28:12,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:28:12,493 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 [2021-06-12 19:28:12,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:28:12,524 INFO L225 Difference]: With dead ends: 23642 [2021-06-12 19:28:12,524 INFO L226 Difference]: Without dead ends: 23636 [2021-06-12 19:28:12,524 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 80.7ms TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:28:12,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23636 states. [2021-06-12 19:28:12,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23636 to 21888. [2021-06-12 19:28:12,830 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) [2021-06-12 19:28:12,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21888 states to 21888 states and 58372 transitions. [2021-06-12 19:28:12,870 INFO L78 Accepts]: Start accepts. Automaton has 21888 states and 58372 transitions. Word has length 65 [2021-06-12 19:28:12,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:28:12,870 INFO L482 AbstractCegarLoop]: Abstraction has 21888 states and 58372 transitions. [2021-06-12 19:28:12,870 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) [2021-06-12 19:28:12,870 INFO L276 IsEmpty]: Start isEmpty. Operand 21888 states and 58372 transitions. [2021-06-12 19:28:12,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-12 19:28:12,887 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:28:12,887 INFO L472 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:28:13,087 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1217,565 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:28:13,087 INFO L430 AbstractCegarLoop]: === Iteration 574 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:28:13,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:28:13,087 INFO L82 PathProgramCache]: Analyzing trace with hash 855335590, now seen corresponding path program 167 times [2021-06-12 19:28:13,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:28:13,087 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347144490] [2021-06-12 19:28:13,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:28:13,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:28:13,210 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 10 proven. 213 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:28:13,211 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:28:13,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347144490] [2021-06-12 19:28:13,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347144490] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:28:13,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150235811] [2021-06-12 19:28:13,211 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 [2021-06-12 19:28:13,246 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-06-12 19:28:13,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:28:13,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-12 19:28:13,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:28:13,339 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 9 proven. 214 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:28:13,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [150235811] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:28:13,339 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:28:13,339 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-12 19:28:13,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154188134] [2021-06-12 19:28:13,339 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:28:13,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:28:13,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:28:13,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:28:13,340 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) [2021-06-12 19:28:14,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:28:14,022 INFO L93 Difference]: Finished difference Result 24640 states and 63599 transitions. [2021-06-12 19:28:14,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 19:28:14,022 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 [2021-06-12 19:28:14,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:28:14,056 INFO L225 Difference]: With dead ends: 24640 [2021-06-12 19:28:14,056 INFO L226 Difference]: Without dead ends: 24581 [2021-06-12 19:28:14,056 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 70 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 185.3ms TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:28:14,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24581 states. [2021-06-12 19:28:14,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24581 to 22019. [2021-06-12 19:28:14,420 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) [2021-06-12 19:28:14,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22019 states to 22019 states and 58704 transitions. [2021-06-12 19:28:14,460 INFO L78 Accepts]: Start accepts. Automaton has 22019 states and 58704 transitions. Word has length 65 [2021-06-12 19:28:14,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:28:14,460 INFO L482 AbstractCegarLoop]: Abstraction has 22019 states and 58704 transitions. [2021-06-12 19:28:14,460 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) [2021-06-12 19:28:14,460 INFO L276 IsEmpty]: Start isEmpty. Operand 22019 states and 58704 transitions. [2021-06-12 19:28:14,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-12 19:28:14,475 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:28:14,476 INFO L472 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:28:14,676 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 566 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1220 [2021-06-12 19:28:14,676 INFO L430 AbstractCegarLoop]: === Iteration 575 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:28:14,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:28:14,676 INFO L82 PathProgramCache]: Analyzing trace with hash -698361267, now seen corresponding path program 349 times [2021-06-12 19:28:14,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:28:14,676 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2008084690] [2021-06-12 19:28:14,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:28:14,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:28:14,750 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 105 proven. 118 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-12 19:28:14,750 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:28:14,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2008084690] [2021-06-12 19:28:14,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2008084690] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:28:14,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921832205] [2021-06-12 19:28:14,750 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-12 19:28:14,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:28:14,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:28:14,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:28:14,871 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 105 proven. 118 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-12 19:28:14,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [921832205] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:28:14,871 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:28:14,871 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-12 19:28:14,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278807546] [2021-06-12 19:28:14,871 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 19:28:14,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:28:14,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 19:28:14,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:28:14,871 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) [2021-06-12 19:28:15,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:28:15,092 INFO L93 Difference]: Finished difference Result 25003 states and 63786 transitions. [2021-06-12 19:28:15,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:28:15,092 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 [2021-06-12 19:28:15,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:28:15,124 INFO L225 Difference]: With dead ends: 25003 [2021-06-12 19:28:15,124 INFO L226 Difference]: Without dead ends: 25000 [2021-06-12 19:28:15,124 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 66.4ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:28:15,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25000 states. [2021-06-12 19:28:15,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25000 to 21981. [2021-06-12 19:28:15,440 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) [2021-06-12 19:28:15,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21981 states to 21981 states and 58569 transitions. [2021-06-12 19:28:15,480 INFO L78 Accepts]: Start accepts. Automaton has 21981 states and 58569 transitions. Word has length 65 [2021-06-12 19:28:15,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:28:15,480 INFO L482 AbstractCegarLoop]: Abstraction has 21981 states and 58569 transitions. [2021-06-12 19:28:15,480 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) [2021-06-12 19:28:15,480 INFO L276 IsEmpty]: Start isEmpty. Operand 21981 states and 58569 transitions. [2021-06-12 19:28:15,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-12 19:28:15,495 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:28:15,495 INFO L472 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:28:15,695 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 567 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1221 [2021-06-12 19:28:15,695 INFO L430 AbstractCegarLoop]: === Iteration 576 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:28:15,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:28:15,696 INFO L82 PathProgramCache]: Analyzing trace with hash -491298701, now seen corresponding path program 350 times [2021-06-12 19:28:15,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:28:15,696 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026828316] [2021-06-12 19:28:15,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:28:15,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:28:15,778 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 102 proven. 121 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-12 19:28:15,778 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:28:15,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026828316] [2021-06-12 19:28:15,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026828316] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:28:15,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118591995] [2021-06-12 19:28:15,779 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 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 [2021-06-12 19:28:15,808 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:28:15,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:28:15,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:28:15,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:28:15,901 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 102 proven. 121 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-12 19:28:15,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1118591995] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:28:15,901 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:28:15,902 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-06-12 19:28:15,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398049159] [2021-06-12 19:28:15,902 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:28:15,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:28:15,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:28:15,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:28:15,902 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) [2021-06-12 19:28:16,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:28:16,168 INFO L93 Difference]: Finished difference Result 24995 states and 63690 transitions. [2021-06-12 19:28:16,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:28:16,169 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 [2021-06-12 19:28:16,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:28:16,202 INFO L225 Difference]: With dead ends: 24995 [2021-06-12 19:28:16,202 INFO L226 Difference]: Without dead ends: 24977 [2021-06-12 19:28:16,202 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 91.3ms TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:28:16,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24977 states. [2021-06-12 19:28:16,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24977 to 21595. [2021-06-12 19:28:16,571 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) [2021-06-12 19:28:16,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21595 states to 21595 states and 57415 transitions. [2021-06-12 19:28:16,609 INFO L78 Accepts]: Start accepts. Automaton has 21595 states and 57415 transitions. Word has length 65 [2021-06-12 19:28:16,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:28:16,609 INFO L482 AbstractCegarLoop]: Abstraction has 21595 states and 57415 transitions. [2021-06-12 19:28:16,609 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) [2021-06-12 19:28:16,609 INFO L276 IsEmpty]: Start isEmpty. Operand 21595 states and 57415 transitions. [2021-06-12 19:28:16,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-12 19:28:16,624 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:28:16,624 INFO L472 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:28:16,824 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 568 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1223 [2021-06-12 19:28:16,824 INFO L430 AbstractCegarLoop]: === Iteration 577 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:28:16,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:28:16,825 INFO L82 PathProgramCache]: Analyzing trace with hash -1939298714, now seen corresponding path program 351 times [2021-06-12 19:28:16,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:28:16,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532139680] [2021-06-12 19:28:16,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:28:16,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:28:16,940 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 22 proven. 201 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:28:16,940 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:28:16,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532139680] [2021-06-12 19:28:16,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532139680] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:28:16,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375156501] [2021-06-12 19:28:16,940 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 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 [2021-06-12 19:28:16,975 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-06-12 19:28:16,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:28:16,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-12 19:28:16,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:28:17,081 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 17 proven. 206 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:28:17,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [375156501] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:28:17,082 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:28:17,082 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-12 19:28:17,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267340383] [2021-06-12 19:28:17,082 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:28:17,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:28:17,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:28:17,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:28:17,082 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) [2021-06-12 19:28:17,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:28:17,947 INFO L93 Difference]: Finished difference Result 23174 states and 60158 transitions. [2021-06-12 19:28:17,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 19:28:17,947 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 [2021-06-12 19:28:17,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:28:17,972 INFO L225 Difference]: With dead ends: 23174 [2021-06-12 19:28:17,973 INFO L226 Difference]: Without dead ends: 23136 [2021-06-12 19:28:17,973 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 70 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 185.5ms TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:28:17,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23136 states. [2021-06-12 19:28:18,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23136 to 21566. [2021-06-12 19:28:18,255 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) [2021-06-12 19:28:18,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21566 states to 21566 states and 57332 transitions. [2021-06-12 19:28:18,294 INFO L78 Accepts]: Start accepts. Automaton has 21566 states and 57332 transitions. Word has length 65 [2021-06-12 19:28:18,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:28:18,294 INFO L482 AbstractCegarLoop]: Abstraction has 21566 states and 57332 transitions. [2021-06-12 19:28:18,294 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) [2021-06-12 19:28:18,294 INFO L276 IsEmpty]: Start isEmpty. Operand 21566 states and 57332 transitions. [2021-06-12 19:28:18,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-12 19:28:18,309 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:28:18,309 INFO L472 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:28:18,510 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 569 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1226 [2021-06-12 19:28:18,510 INFO L430 AbstractCegarLoop]: === Iteration 578 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:28:18,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:28:18,510 INFO L82 PathProgramCache]: Analyzing trace with hash 1742132402, now seen corresponding path program 352 times [2021-06-12 19:28:18,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:28:18,510 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941350466] [2021-06-12 19:28:18,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:28:18,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:28:18,641 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 19 proven. 202 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-12 19:28:18,642 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:28:18,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941350466] [2021-06-12 19:28:18,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941350466] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:28:18,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1580925039] [2021-06-12 19:28:18,642 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 [2021-06-12 19:28:18,680 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:28:18,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:28:18,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-12 19:28:18,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:28:18,777 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 18 proven. 203 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-12 19:28:18,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1580925039] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:28:18,778 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:28:18,778 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-12 19:28:18,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333779738] [2021-06-12 19:28:18,778 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:28:18,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:28:18,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:28:18,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:28:18,778 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) [2021-06-12 19:28:19,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:28:19,520 INFO L93 Difference]: Finished difference Result 23637 states and 61214 transitions. [2021-06-12 19:28:19,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 19:28:19,520 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 [2021-06-12 19:28:19,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:28:19,549 INFO L225 Difference]: With dead ends: 23637 [2021-06-12 19:28:19,549 INFO L226 Difference]: Without dead ends: 23625 [2021-06-12 19:28:19,550 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 70 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 193.9ms TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:28:19,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23625 states. [2021-06-12 19:28:19,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23625 to 21570. [2021-06-12 19:28:19,835 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) [2021-06-12 19:28:19,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21570 states to 21570 states and 57337 transitions. [2021-06-12 19:28:19,873 INFO L78 Accepts]: Start accepts. Automaton has 21570 states and 57337 transitions. Word has length 65 [2021-06-12 19:28:19,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:28:19,873 INFO L482 AbstractCegarLoop]: Abstraction has 21570 states and 57337 transitions. [2021-06-12 19:28:19,873 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) [2021-06-12 19:28:19,873 INFO L276 IsEmpty]: Start isEmpty. Operand 21570 states and 57337 transitions. [2021-06-12 19:28:19,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-12 19:28:19,889 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:28:19,889 INFO L472 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:28:20,089 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1227,570 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:28:20,090 INFO L430 AbstractCegarLoop]: === Iteration 579 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:28:20,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:28:20,090 INFO L82 PathProgramCache]: Analyzing trace with hash 1584832915, now seen corresponding path program 168 times [2021-06-12 19:28:20,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:28:20,090 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990305688] [2021-06-12 19:28:20,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:28:20,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:28:20,188 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 111 proven. 115 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:28:20,188 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:28:20,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990305688] [2021-06-12 19:28:20,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990305688] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:28:20,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868392784] [2021-06-12 19:28:20,189 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 [2021-06-12 19:28:20,236 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-06-12 19:28:20,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:28:20,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:28:20,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:28:20,392 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 113 proven. 115 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:28:20,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1868392784] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:28:20,392 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:28:20,393 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 16 [2021-06-12 19:28:20,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714733663] [2021-06-12 19:28:20,393 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:28:20,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:28:20,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:28:20,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:28:20,393 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) [2021-06-12 19:28:20,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:28:20,695 INFO L93 Difference]: Finished difference Result 28789 states and 71294 transitions. [2021-06-12 19:28:20,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 19:28:20,696 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 [2021-06-12 19:28:20,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:28:20,734 INFO L225 Difference]: With dead ends: 28789 [2021-06-12 19:28:20,734 INFO L226 Difference]: Without dead ends: 28769 [2021-06-12 19:28:20,734 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 148.5ms TimeCoverageRelationStatistics Valid=139, Invalid=241, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:28:20,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28769 states. [2021-06-12 19:28:21,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28769 to 21641. [2021-06-12 19:28:21,053 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) [2021-06-12 19:28:21,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21641 states to 21641 states and 57575 transitions. [2021-06-12 19:28:21,091 INFO L78 Accepts]: Start accepts. Automaton has 21641 states and 57575 transitions. Word has length 65 [2021-06-12 19:28:21,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:28:21,091 INFO L482 AbstractCegarLoop]: Abstraction has 21641 states and 57575 transitions. [2021-06-12 19:28:21,091 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) [2021-06-12 19:28:21,091 INFO L276 IsEmpty]: Start isEmpty. Operand 21641 states and 57575 transitions. [2021-06-12 19:28:21,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-12 19:28:21,105 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:28:21,105 INFO L472 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:28:21,305 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 571 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1228 [2021-06-12 19:28:21,306 INFO L430 AbstractCegarLoop]: === Iteration 580 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:28:21,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:28:21,306 INFO L82 PathProgramCache]: Analyzing trace with hash -410917560, now seen corresponding path program 353 times [2021-06-12 19:28:21,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:28:21,306 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105130631] [2021-06-12 19:28:21,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:28:21,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:28:21,413 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 18 proven. 207 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:28:21,413 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:28:21,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105130631] [2021-06-12 19:28:21,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105130631] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:28:21,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20918846] [2021-06-12 19:28:21,413 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-12 19:28:21,448 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-06-12 19:28:21,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:28:21,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-12 19:28:21,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:28:21,544 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 18 proven. 207 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:28:21,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [20918846] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:28:21,544 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:28:21,544 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-12 19:28:21,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809811437] [2021-06-12 19:28:21,544 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:28:21,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:28:21,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:28:21,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:28:21,544 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) [2021-06-12 19:28:22,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:28:22,391 INFO L93 Difference]: Finished difference Result 24593 states and 63329 transitions. [2021-06-12 19:28:22,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 19:28:22,392 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 [2021-06-12 19:28:22,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:28:22,423 INFO L225 Difference]: With dead ends: 24593 [2021-06-12 19:28:22,423 INFO L226 Difference]: Without dead ends: 24581 [2021-06-12 19:28:22,423 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 70 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 205.9ms TimeCoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:28:22,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24581 states. [2021-06-12 19:28:22,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24581 to 21673. [2021-06-12 19:28:22,719 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) [2021-06-12 19:28:22,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21673 states to 21673 states and 57651 transitions. [2021-06-12 19:28:22,752 INFO L78 Accepts]: Start accepts. Automaton has 21673 states and 57651 transitions. Word has length 65 [2021-06-12 19:28:22,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:28:22,752 INFO L482 AbstractCegarLoop]: Abstraction has 21673 states and 57651 transitions. [2021-06-12 19:28:22,752 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) [2021-06-12 19:28:22,752 INFO L276 IsEmpty]: Start isEmpty. Operand 21673 states and 57651 transitions. [2021-06-12 19:28:22,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-12 19:28:22,767 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:28:22,767 INFO L472 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:28:22,967 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 572 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1231 [2021-06-12 19:28:22,968 INFO L430 AbstractCegarLoop]: === Iteration 581 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:28:22,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:28:22,968 INFO L82 PathProgramCache]: Analyzing trace with hash -1270859487, now seen corresponding path program 169 times [2021-06-12 19:28:22,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:28:22,968 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639030866] [2021-06-12 19:28:22,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:28:22,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:28:23,047 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 135 proven. 91 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:28:23,047 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:28:23,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639030866] [2021-06-12 19:28:23,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639030866] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:28:23,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51857394] [2021-06-12 19:28:23,047 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 [2021-06-12 19:28:23,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:28:23,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:28:23,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:28:23,178 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 136 proven. 91 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:28:23,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [51857394] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:28:23,178 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:28:23,178 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 13 [2021-06-12 19:28:23,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854591748] [2021-06-12 19:28:23,178 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:28:23,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:28:23,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:28:23,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=109, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:28:23,179 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) [2021-06-12 19:28:23,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:28:23,475 INFO L93 Difference]: Finished difference Result 31661 states and 78137 transitions. [2021-06-12 19:28:23,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:28:23,476 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 [2021-06-12 19:28:23,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:28:23,517 INFO L225 Difference]: With dead ends: 31661 [2021-06-12 19:28:23,517 INFO L226 Difference]: Without dead ends: 31661 [2021-06-12 19:28:23,517 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 90.6ms TimeCoverageRelationStatistics Valid=101, Invalid=139, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:28:23,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31661 states. [2021-06-12 19:28:23,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31661 to 21919. [2021-06-12 19:28:23,862 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) [2021-06-12 19:28:23,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21919 states to 21919 states and 58423 transitions. [2021-06-12 19:28:23,898 INFO L78 Accepts]: Start accepts. Automaton has 21919 states and 58423 transitions. Word has length 65 [2021-06-12 19:28:23,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:28:23,898 INFO L482 AbstractCegarLoop]: Abstraction has 21919 states and 58423 transitions. [2021-06-12 19:28:23,898 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) [2021-06-12 19:28:23,898 INFO L276 IsEmpty]: Start isEmpty. Operand 21919 states and 58423 transitions. [2021-06-12 19:28:23,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-12 19:28:23,913 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:28:23,913 INFO L472 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:28:24,113 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1232,573 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:28:24,113 INFO L430 AbstractCegarLoop]: === Iteration 582 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:28:24,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:28:24,114 INFO L82 PathProgramCache]: Analyzing trace with hash 1386535353, now seen corresponding path program 170 times [2021-06-12 19:28:24,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:28:24,114 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114478702] [2021-06-12 19:28:24,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:28:24,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:28:24,204 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 129 proven. 98 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:28:24,204 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:28:24,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114478702] [2021-06-12 19:28:24,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114478702] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:28:24,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748635251] [2021-06-12 19:28:24,204 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 [2021-06-12 19:28:24,234 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:28:24,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:28:24,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:28:24,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:28:24,337 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 130 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:28:24,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [748635251] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:28:24,338 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:28:24,338 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 14 [2021-06-12 19:28:24,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547559130] [2021-06-12 19:28:24,338 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:28:24,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:28:24,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:28:24,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=134, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:28:24,338 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) [2021-06-12 19:28:24,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:28:24,697 INFO L93 Difference]: Finished difference Result 29555 states and 73447 transitions. [2021-06-12 19:28:24,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:28:24,697 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 [2021-06-12 19:28:24,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:28:24,733 INFO L225 Difference]: With dead ends: 29555 [2021-06-12 19:28:24,733 INFO L226 Difference]: Without dead ends: 29555 [2021-06-12 19:28:24,733 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 110.4ms TimeCoverageRelationStatistics Valid=121, Invalid=185, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:28:24,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29555 states. [2021-06-12 19:28:25,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29555 to 21626. [2021-06-12 19:28:25,033 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) [2021-06-12 19:28:25,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21626 states to 21626 states and 57545 transitions. [2021-06-12 19:28:25,066 INFO L78 Accepts]: Start accepts. Automaton has 21626 states and 57545 transitions. Word has length 65 [2021-06-12 19:28:25,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:28:25,066 INFO L482 AbstractCegarLoop]: Abstraction has 21626 states and 57545 transitions. [2021-06-12 19:28:25,067 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) [2021-06-12 19:28:25,067 INFO L276 IsEmpty]: Start isEmpty. Operand 21626 states and 57545 transitions. [2021-06-12 19:28:25,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-12 19:28:25,081 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:28:25,081 INFO L472 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:28:25,281 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 574 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1233 [2021-06-12 19:28:25,281 INFO L430 AbstractCegarLoop]: === Iteration 583 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:28:25,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:28:25,282 INFO L82 PathProgramCache]: Analyzing trace with hash 1121641549, now seen corresponding path program 354 times [2021-06-12 19:28:25,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:28:25,282 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680229212] [2021-06-12 19:28:25,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:28:25,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:28:25,373 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 104 proven. 123 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:28:25,373 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:28:25,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680229212] [2021-06-12 19:28:25,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680229212] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:28:25,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738998110] [2021-06-12 19:28:25,373 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 [2021-06-12 19:28:25,407 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-06-12 19:28:25,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:28:25,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:28:25,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:28:25,501 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 104 proven. 123 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:28:25,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [738998110] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:28:25,501 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:28:25,501 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-06-12 19:28:25,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000434212] [2021-06-12 19:28:25,502 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:28:25,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:28:25,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:28:25,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:28:25,502 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) [2021-06-12 19:28:25,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:28:25,777 INFO L93 Difference]: Finished difference Result 24366 states and 62196 transitions. [2021-06-12 19:28:25,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:28:25,777 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 [2021-06-12 19:28:25,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:28:25,804 INFO L225 Difference]: With dead ends: 24366 [2021-06-12 19:28:25,804 INFO L226 Difference]: Without dead ends: 24348 [2021-06-12 19:28:25,804 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 101.1ms TimeCoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:28:25,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24348 states. [2021-06-12 19:28:26,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24348 to 21626. [2021-06-12 19:28:26,072 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) [2021-06-12 19:28:26,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21626 states to 21626 states and 57535 transitions. [2021-06-12 19:28:26,106 INFO L78 Accepts]: Start accepts. Automaton has 21626 states and 57535 transitions. Word has length 65 [2021-06-12 19:28:26,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:28:26,106 INFO L482 AbstractCegarLoop]: Abstraction has 21626 states and 57535 transitions. [2021-06-12 19:28:26,106 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) [2021-06-12 19:28:26,106 INFO L276 IsEmpty]: Start isEmpty. Operand 21626 states and 57535 transitions. [2021-06-12 19:28:26,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-12 19:28:26,120 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:28:26,120 INFO L472 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:28:26,320 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1234,575 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:28:26,321 INFO L430 AbstractCegarLoop]: === Iteration 584 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:28:26,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:28:26,321 INFO L82 PathProgramCache]: Analyzing trace with hash 1172605066, now seen corresponding path program 171 times [2021-06-12 19:28:26,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:28:26,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846213069] [2021-06-12 19:28:26,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:28:26,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:28:26,429 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 10 proven. 213 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:28:26,429 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:28:26,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846213069] [2021-06-12 19:28:26,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846213069] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:28:26,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291630492] [2021-06-12 19:28:26,429 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 [2021-06-12 19:28:26,466 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-06-12 19:28:26,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:28:26,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-12 19:28:26,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:28:26,562 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 9 proven. 214 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:28:26,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291630492] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:28:26,562 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:28:26,562 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-12 19:28:26,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454277264] [2021-06-12 19:28:26,563 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:28:26,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:28:26,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:28:26,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:28:26,563 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) [2021-06-12 19:28:27,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:28:27,277 INFO L93 Difference]: Finished difference Result 24595 states and 63247 transitions. [2021-06-12 19:28:27,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 19:28:27,278 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 [2021-06-12 19:28:27,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:28:27,307 INFO L225 Difference]: With dead ends: 24595 [2021-06-12 19:28:27,307 INFO L226 Difference]: Without dead ends: 24545 [2021-06-12 19:28:27,307 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 70 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 175.0ms TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:28:27,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24545 states. [2021-06-12 19:28:27,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24545 to 21849. [2021-06-12 19:28:27,624 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) [2021-06-12 19:28:27,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21849 states to 21849 states and 58107 transitions. [2021-06-12 19:28:27,661 INFO L78 Accepts]: Start accepts. Automaton has 21849 states and 58107 transitions. Word has length 65 [2021-06-12 19:28:27,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:28:27,661 INFO L482 AbstractCegarLoop]: Abstraction has 21849 states and 58107 transitions. [2021-06-12 19:28:27,661 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) [2021-06-12 19:28:27,661 INFO L276 IsEmpty]: Start isEmpty. Operand 21849 states and 58107 transitions. [2021-06-12 19:28:27,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-12 19:28:27,677 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:28:27,677 INFO L472 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:28:27,877 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 576 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1238 [2021-06-12 19:28:27,878 INFO L430 AbstractCegarLoop]: === Iteration 585 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:28:27,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:28:27,878 INFO L82 PathProgramCache]: Analyzing trace with hash -381091791, now seen corresponding path program 355 times [2021-06-12 19:28:27,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:28:27,878 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626762171] [2021-06-12 19:28:27,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:28:27,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:28:27,948 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 89 proven. 134 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-12 19:28:27,949 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:28:27,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626762171] [2021-06-12 19:28:27,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626762171] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:28:27,949 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212345025] [2021-06-12 19:28:27,949 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 [2021-06-12 19:28:27,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:28:27,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:28:27,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:28:28,069 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 89 proven. 134 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-12 19:28:28,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212345025] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:28:28,070 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:28:28,070 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-12 19:28:28,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525215841] [2021-06-12 19:28:28,070 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 19:28:28,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:28:28,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 19:28:28,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:28:28,070 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) [2021-06-12 19:28:28,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:28:28,276 INFO L93 Difference]: Finished difference Result 25610 states and 64561 transitions. [2021-06-12 19:28:28,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:28:28,276 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 [2021-06-12 19:28:28,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:28:28,309 INFO L225 Difference]: With dead ends: 25610 [2021-06-12 19:28:28,309 INFO L226 Difference]: Without dead ends: 25607 [2021-06-12 19:28:28,309 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 62.2ms TimeCoverageRelationStatistics Valid=64, Invalid=92, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:28:28,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25607 states. [2021-06-12 19:28:28,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25607 to 21817. [2021-06-12 19:28:28,621 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) [2021-06-12 19:28:28,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21817 states to 21817 states and 57986 transitions. [2021-06-12 19:28:28,658 INFO L78 Accepts]: Start accepts. Automaton has 21817 states and 57986 transitions. Word has length 65 [2021-06-12 19:28:28,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:28:28,658 INFO L482 AbstractCegarLoop]: Abstraction has 21817 states and 57986 transitions. [2021-06-12 19:28:28,658 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) [2021-06-12 19:28:28,658 INFO L276 IsEmpty]: Start isEmpty. Operand 21817 states and 57986 transitions. [2021-06-12 19:28:28,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-12 19:28:28,674 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:28:28,674 INFO L472 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:28:28,874 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1239,577 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:28:28,875 INFO L430 AbstractCegarLoop]: === Iteration 586 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:28:28,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:28:28,875 INFO L82 PathProgramCache]: Analyzing trace with hash -174029225, now seen corresponding path program 356 times [2021-06-12 19:28:28,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:28:28,875 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120269069] [2021-06-12 19:28:28,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:28:28,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:28:28,969 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 85 proven. 138 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-12 19:28:28,969 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:28:28,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120269069] [2021-06-12 19:28:28,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120269069] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:28:28,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226260902] [2021-06-12 19:28:28,969 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 [2021-06-12 19:28:28,999 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:28:28,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:28:29,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:28:29,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:28:29,093 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 85 proven. 138 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-12 19:28:29,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [226260902] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:28:29,094 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:28:29,094 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-06-12 19:28:29,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286746139] [2021-06-12 19:28:29,094 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:28:29,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:28:29,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:28:29,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:28:29,094 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) [2021-06-12 19:28:29,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:28:29,363 INFO L93 Difference]: Finished difference Result 25614 states and 64489 transitions. [2021-06-12 19:28:29,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:28:29,363 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 [2021-06-12 19:28:29,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:28:29,397 INFO L225 Difference]: With dead ends: 25614 [2021-06-12 19:28:29,397 INFO L226 Difference]: Without dead ends: 25596 [2021-06-12 19:28:29,397 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 90.5ms TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:28:29,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25596 states. [2021-06-12 19:28:29,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25596 to 21817. [2021-06-12 19:28:29,769 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) [2021-06-12 19:28:29,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21817 states to 21817 states and 57952 transitions. [2021-06-12 19:28:29,806 INFO L78 Accepts]: Start accepts. Automaton has 21817 states and 57952 transitions. Word has length 65 [2021-06-12 19:28:29,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:28:29,806 INFO L482 AbstractCegarLoop]: Abstraction has 21817 states and 57952 transitions. [2021-06-12 19:28:29,806 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) [2021-06-12 19:28:29,806 INFO L276 IsEmpty]: Start isEmpty. Operand 21817 states and 57952 transitions. [2021-06-12 19:28:29,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-12 19:28:29,821 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:28:29,821 INFO L472 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:28:30,021 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1241,578 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:28:30,021 INFO L430 AbstractCegarLoop]: === Iteration 587 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:28:30,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:28:30,022 INFO L82 PathProgramCache]: Analyzing trace with hash -1622029238, now seen corresponding path program 357 times [2021-06-12 19:28:30,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:28:30,022 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652527176] [2021-06-12 19:28:30,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:28:30,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:28:30,121 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 22 proven. 201 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:28:30,121 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:28:30,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652527176] [2021-06-12 19:28:30,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652527176] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:28:30,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212800308] [2021-06-12 19:28:30,121 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 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 [2021-06-12 19:28:30,155 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-06-12 19:28:30,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:28:30,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-12 19:28:30,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:28:30,261 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 17 proven. 206 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:28:30,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1212800308] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:28:30,261 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:28:30,261 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-12 19:28:30,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314048076] [2021-06-12 19:28:30,261 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:28:30,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:28:30,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:28:30,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:28:30,261 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) [2021-06-12 19:28:31,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:28:31,121 INFO L93 Difference]: Finished difference Result 23463 states and 60807 transitions. [2021-06-12 19:28:31,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 19:28:31,121 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 [2021-06-12 19:28:31,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:28:31,148 INFO L225 Difference]: With dead ends: 23463 [2021-06-12 19:28:31,148 INFO L226 Difference]: Without dead ends: 23407 [2021-06-12 19:28:31,149 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 70 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 174.4ms TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:28:31,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23407 states. [2021-06-12 19:28:31,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23407 to 21785. [2021-06-12 19:28:31,445 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) [2021-06-12 19:28:31,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21785 states to 21785 states and 57821 transitions. [2021-06-12 19:28:31,482 INFO L78 Accepts]: Start accepts. Automaton has 21785 states and 57821 transitions. Word has length 65 [2021-06-12 19:28:31,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:28:31,482 INFO L482 AbstractCegarLoop]: Abstraction has 21785 states and 57821 transitions. [2021-06-12 19:28:31,482 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) [2021-06-12 19:28:31,482 INFO L276 IsEmpty]: Start isEmpty. Operand 21785 states and 57821 transitions. [2021-06-12 19:28:31,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-12 19:28:31,498 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:28:31,498 INFO L472 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:28:31,698 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 579 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1244 [2021-06-12 19:28:31,698 INFO L430 AbstractCegarLoop]: === Iteration 588 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:28:31,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:28:31,698 INFO L82 PathProgramCache]: Analyzing trace with hash 2059401878, now seen corresponding path program 358 times [2021-06-12 19:28:31,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:28:31,698 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303038560] [2021-06-12 19:28:31,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:28:31,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:28:31,804 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 19 proven. 202 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-12 19:28:31,804 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:28:31,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303038560] [2021-06-12 19:28:31,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303038560] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:28:31,804 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072425062] [2021-06-12 19:28:31,804 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-12 19:28:31,833 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:28:31,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:28:31,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-12 19:28:31,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:28:31,927 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 18 proven. 203 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-12 19:28:31,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072425062] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:28:31,927 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:28:31,927 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-12 19:28:31,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744601852] [2021-06-12 19:28:31,928 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:28:31,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:28:31,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:28:31,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:28:31,928 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) [2021-06-12 19:28:32,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:28:32,655 INFO L93 Difference]: Finished difference Result 24092 states and 62187 transitions. [2021-06-12 19:28:32,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 19:28:32,655 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 [2021-06-12 19:28:32,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:28:32,683 INFO L225 Difference]: With dead ends: 24092 [2021-06-12 19:28:32,683 INFO L226 Difference]: Without dead ends: 24080 [2021-06-12 19:28:32,684 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 70 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 172.8ms TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:28:32,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24080 states. [2021-06-12 19:28:32,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24080 to 21828. [2021-06-12 19:28:32,954 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) [2021-06-12 19:28:32,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21828 states to 21828 states and 57911 transitions. [2021-06-12 19:28:32,989 INFO L78 Accepts]: Start accepts. Automaton has 21828 states and 57911 transitions. Word has length 65 [2021-06-12 19:28:32,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:28:32,989 INFO L482 AbstractCegarLoop]: Abstraction has 21828 states and 57911 transitions. [2021-06-12 19:28:32,990 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) [2021-06-12 19:28:32,990 INFO L276 IsEmpty]: Start isEmpty. Operand 21828 states and 57911 transitions. [2021-06-12 19:28:33,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-12 19:28:33,004 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:28:33,004 INFO L472 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:28:33,204 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 580 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1245 [2021-06-12 19:28:33,205 INFO L430 AbstractCegarLoop]: === Iteration 589 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:28:33,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:28:33,205 INFO L82 PathProgramCache]: Analyzing trace with hash 1902102391, now seen corresponding path program 172 times [2021-06-12 19:28:33,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:28:33,205 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432534519] [2021-06-12 19:28:33,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:28:33,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:28:33,284 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 130 proven. 96 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:28:33,284 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:28:33,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432534519] [2021-06-12 19:28:33,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432534519] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:28:33,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110212431] [2021-06-12 19:28:33,284 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 [2021-06-12 19:28:33,313 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:28:33,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:28:33,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:28:33,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:28:33,412 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 132 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:28:33,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [110212431] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:28:33,412 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:28:33,412 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 13 [2021-06-12 19:28:33,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636445964] [2021-06-12 19:28:33,412 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:28:33,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:28:33,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:28:33,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:28:33,413 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) [2021-06-12 19:28:33,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:28:33,696 INFO L93 Difference]: Finished difference Result 28795 states and 71587 transitions. [2021-06-12 19:28:33,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:28:33,696 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 [2021-06-12 19:28:33,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:28:33,732 INFO L225 Difference]: With dead ends: 28795 [2021-06-12 19:28:33,733 INFO L226 Difference]: Without dead ends: 28765 [2021-06-12 19:28:33,733 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 92.8ms TimeCoverageRelationStatistics Valid=104, Invalid=168, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:28:33,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28765 states. [2021-06-12 19:28:34,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28765 to 21897. [2021-06-12 19:28:34,057 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) [2021-06-12 19:28:34,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21897 states to 21897 states and 58076 transitions. [2021-06-12 19:28:34,095 INFO L78 Accepts]: Start accepts. Automaton has 21897 states and 58076 transitions. Word has length 65 [2021-06-12 19:28:34,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:28:34,095 INFO L482 AbstractCegarLoop]: Abstraction has 21897 states and 58076 transitions. [2021-06-12 19:28:34,095 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) [2021-06-12 19:28:34,095 INFO L276 IsEmpty]: Start isEmpty. Operand 21897 states and 58076 transitions. [2021-06-12 19:28:34,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-12 19:28:34,110 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:28:34,110 INFO L472 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:28:34,310 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1246,581 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:28:34,310 INFO L430 AbstractCegarLoop]: === Iteration 590 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:28:34,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:28:34,310 INFO L82 PathProgramCache]: Analyzing trace with hash -93648084, now seen corresponding path program 359 times [2021-06-12 19:28:34,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:28:34,311 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469994237] [2021-06-12 19:28:34,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:28:34,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:28:34,419 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 19 proven. 204 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:28:34,419 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:28:34,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469994237] [2021-06-12 19:28:34,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469994237] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:28:34,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936474964] [2021-06-12 19:28:34,419 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 [2021-06-12 19:28:34,454 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-06-12 19:28:34,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:28:34,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-12 19:28:34,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:28:34,548 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 18 proven. 205 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:28:34,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [936474964] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:28:34,548 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:28:34,548 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-12 19:28:34,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197189580] [2021-06-12 19:28:34,549 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:28:34,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:28:34,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:28:34,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:28:34,549 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) [2021-06-12 19:28:35,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:28:35,406 INFO L93 Difference]: Finished difference Result 25821 states and 65999 transitions. [2021-06-12 19:28:35,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 19:28:35,406 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 [2021-06-12 19:28:35,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:28:35,441 INFO L225 Difference]: With dead ends: 25821 [2021-06-12 19:28:35,441 INFO L226 Difference]: Without dead ends: 25779 [2021-06-12 19:28:35,441 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 70 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 274.1ms TimeCoverageRelationStatistics Valid=87, Invalid=615, Unknown=0, NotChecked=0, Total=702 [2021-06-12 19:28:35,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25779 states. [2021-06-12 19:28:35,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25779 to 21985. [2021-06-12 19:28:35,751 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) [2021-06-12 19:28:35,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21985 states to 21985 states and 58317 transitions. [2021-06-12 19:28:35,791 INFO L78 Accepts]: Start accepts. Automaton has 21985 states and 58317 transitions. Word has length 65 [2021-06-12 19:28:35,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:28:35,791 INFO L482 AbstractCegarLoop]: Abstraction has 21985 states and 58317 transitions. [2021-06-12 19:28:35,792 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) [2021-06-12 19:28:35,792 INFO L276 IsEmpty]: Start isEmpty. Operand 21985 states and 58317 transitions. [2021-06-12 19:28:35,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-12 19:28:35,807 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:28:35,807 INFO L472 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:28:36,007 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 582 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1249 [2021-06-12 19:28:36,008 INFO L430 AbstractCegarLoop]: === Iteration 591 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:28:36,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:28:36,008 INFO L82 PathProgramCache]: Analyzing trace with hash 1438911025, now seen corresponding path program 360 times [2021-06-12 19:28:36,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:28:36,008 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050559680] [2021-06-12 19:28:36,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:28:36,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:28:36,094 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 83 proven. 143 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:28:36,094 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:28:36,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050559680] [2021-06-12 19:28:36,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050559680] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:28:36,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970026790] [2021-06-12 19:28:36,095 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 [2021-06-12 19:28:36,129 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-06-12 19:28:36,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:28:36,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:28:36,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:28:36,223 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 83 proven. 143 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:28:36,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1970026790] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:28:36,223 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:28:36,223 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-06-12 19:28:36,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561480125] [2021-06-12 19:28:36,223 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:28:36,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:28:36,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:28:36,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:28:36,223 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) [2021-06-12 19:28:36,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:28:36,499 INFO L93 Difference]: Finished difference Result 25751 states and 64746 transitions. [2021-06-12 19:28:36,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:28:36,500 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 [2021-06-12 19:28:36,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:28:36,534 INFO L225 Difference]: With dead ends: 25751 [2021-06-12 19:28:36,534 INFO L226 Difference]: Without dead ends: 25727 [2021-06-12 19:28:36,534 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 96.3ms TimeCoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:28:36,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25727 states. [2021-06-12 19:28:36,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25727 to 21464. [2021-06-12 19:28:36,849 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) [2021-06-12 19:28:36,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21464 states to 21464 states and 56807 transitions. [2021-06-12 19:28:36,885 INFO L78 Accepts]: Start accepts. Automaton has 21464 states and 56807 transitions. Word has length 65 [2021-06-12 19:28:36,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:28:36,885 INFO L482 AbstractCegarLoop]: Abstraction has 21464 states and 56807 transitions. [2021-06-12 19:28:36,885 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) [2021-06-12 19:28:36,886 INFO L276 IsEmpty]: Start isEmpty. Operand 21464 states and 56807 transitions. [2021-06-12 19:28:36,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-12 19:28:36,900 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:28:36,900 INFO L472 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:28:37,100 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 583 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1250 [2021-06-12 19:28:37,101 INFO L430 AbstractCegarLoop]: === Iteration 592 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:28:37,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:28:37,101 INFO L82 PathProgramCache]: Analyzing trace with hash 61188450, now seen corresponding path program 361 times [2021-06-12 19:28:37,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:28:37,101 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226580267] [2021-06-12 19:28:37,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:28:37,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:28:37,220 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 18 proven. 207 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:28:37,220 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:28:37,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226580267] [2021-06-12 19:28:37,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226580267] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:28:37,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694209436] [2021-06-12 19:28:37,221 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 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 [2021-06-12 19:28:37,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:28:37,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-12 19:28:37,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:28:37,345 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 18 proven. 207 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:28:37,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [694209436] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:28:37,346 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:28:37,346 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-12 19:28:37,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213592372] [2021-06-12 19:28:37,346 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:28:37,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:28:37,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:28:37,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:28:37,346 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) [2021-06-12 19:28:38,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:28:38,253 INFO L93 Difference]: Finished difference Result 26000 states and 65957 transitions. [2021-06-12 19:28:38,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 19:28:38,253 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 [2021-06-12 19:28:38,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:28:38,286 INFO L225 Difference]: With dead ends: 26000 [2021-06-12 19:28:38,286 INFO L226 Difference]: Without dead ends: 25946 [2021-06-12 19:28:38,286 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 69 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 246.6ms TimeCoverageRelationStatistics Valid=94, Invalid=662, Unknown=0, NotChecked=0, Total=756 [2021-06-12 19:28:38,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25946 states. [2021-06-12 19:28:38,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25946 to 21403. [2021-06-12 19:28:38,594 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) [2021-06-12 19:28:38,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21403 states to 21403 states and 56605 transitions. [2021-06-12 19:28:38,632 INFO L78 Accepts]: Start accepts. Automaton has 21403 states and 56605 transitions. Word has length 65 [2021-06-12 19:28:38,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:28:38,633 INFO L482 AbstractCegarLoop]: Abstraction has 21403 states and 56605 transitions. [2021-06-12 19:28:38,633 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) [2021-06-12 19:28:38,633 INFO L276 IsEmpty]: Start isEmpty. Operand 21403 states and 56605 transitions. [2021-06-12 19:28:38,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-12 19:28:38,649 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:28:38,649 INFO L472 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:28:38,849 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 584 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1254 [2021-06-12 19:28:38,849 INFO L430 AbstractCegarLoop]: === Iteration 593 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:28:38,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:28:38,850 INFO L82 PathProgramCache]: Analyzing trace with hash -798753477, now seen corresponding path program 173 times [2021-06-12 19:28:38,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:28:38,850 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280708681] [2021-06-12 19:28:38,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:28:38,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:28:38,926 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 154 proven. 72 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:28:38,927 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:28:38,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280708681] [2021-06-12 19:28:38,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280708681] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:28:38,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257464667] [2021-06-12 19:28:38,927 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 [2021-06-12 19:28:38,962 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-06-12 19:28:38,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:28:38,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:28:38,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:28:39,134 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 156 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:28:39,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1257464667] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:28:39,134 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:28:39,134 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 19] total 21 [2021-06-12 19:28:39,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988678329] [2021-06-12 19:28:39,135 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 19:28:39,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:28:39,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 19:28:39,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=290, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:28:39,135 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) [2021-06-12 19:28:39,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:28:39,657 INFO L93 Difference]: Finished difference Result 34849 states and 85268 transitions. [2021-06-12 19:28:39,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 19:28:39,657 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 [2021-06-12 19:28:39,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:28:39,705 INFO L225 Difference]: With dead ends: 34849 [2021-06-12 19:28:39,706 INFO L226 Difference]: Without dead ends: 34849 [2021-06-12 19:28:39,706 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 220.0ms TimeCoverageRelationStatistics Valid=303, Invalid=453, Unknown=0, NotChecked=0, Total=756 [2021-06-12 19:28:39,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34849 states. [2021-06-12 19:28:40,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34849 to 21691. [2021-06-12 19:28:40,079 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) [2021-06-12 19:28:40,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21691 states to 21691 states and 57486 transitions. [2021-06-12 19:28:40,118 INFO L78 Accepts]: Start accepts. Automaton has 21691 states and 57486 transitions. Word has length 65 [2021-06-12 19:28:40,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:28:40,118 INFO L482 AbstractCegarLoop]: Abstraction has 21691 states and 57486 transitions. [2021-06-12 19:28:40,118 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) [2021-06-12 19:28:40,118 INFO L276 IsEmpty]: Start isEmpty. Operand 21691 states and 57486 transitions. [2021-06-12 19:28:40,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-12 19:28:40,134 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:28:40,134 INFO L472 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:28:40,334 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 585 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1255 [2021-06-12 19:28:40,334 INFO L430 AbstractCegarLoop]: === Iteration 594 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:28:40,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:28:40,335 INFO L82 PathProgramCache]: Analyzing trace with hash 1858641363, now seen corresponding path program 174 times [2021-06-12 19:28:40,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:28:40,335 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813411136] [2021-06-12 19:28:40,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:28:40,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:28:40,527 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 149 proven. 77 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:28:40,527 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:28:40,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813411136] [2021-06-12 19:28:40,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813411136] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:28:40,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483704355] [2021-06-12 19:28:40,527 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 [2021-06-12 19:28:40,563 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-06-12 19:28:40,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:28:40,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:28:40,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:28:40,665 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 150 proven. 77 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:28:40,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [483704355] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:28:40,665 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:28:40,665 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 14 [2021-06-12 19:28:40,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119907852] [2021-06-12 19:28:40,666 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:28:40,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:28:40,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:28:40,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=133, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:28:40,666 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) [2021-06-12 19:28:41,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:28:41,007 INFO L93 Difference]: Finished difference Result 33025 states and 80919 transitions. [2021-06-12 19:28:41,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:28:41,007 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 [2021-06-12 19:28:41,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:28:41,052 INFO L225 Difference]: With dead ends: 33025 [2021-06-12 19:28:41,053 INFO L226 Difference]: Without dead ends: 33025 [2021-06-12 19:28:41,053 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 120.9ms TimeCoverageRelationStatistics Valid=154, Invalid=226, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:28:41,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33025 states. [2021-06-12 19:28:41,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33025 to 21674. [2021-06-12 19:28:41,405 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) [2021-06-12 19:28:41,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21674 states to 21674 states and 57411 transitions. [2021-06-12 19:28:41,438 INFO L78 Accepts]: Start accepts. Automaton has 21674 states and 57411 transitions. Word has length 65 [2021-06-12 19:28:41,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:28:41,438 INFO L482 AbstractCegarLoop]: Abstraction has 21674 states and 57411 transitions. [2021-06-12 19:28:41,438 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) [2021-06-12 19:28:41,439 INFO L276 IsEmpty]: Start isEmpty. Operand 21674 states and 57411 transitions. [2021-06-12 19:28:41,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-12 19:28:41,452 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:28:41,452 INFO L472 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:28:41,652 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 586 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1256 [2021-06-12 19:28:41,653 INFO L430 AbstractCegarLoop]: === Iteration 595 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:28:41,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:28:41,653 INFO L82 PathProgramCache]: Analyzing trace with hash 168646199, now seen corresponding path program 175 times [2021-06-12 19:28:41,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:28:41,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257291446] [2021-06-12 19:28:41,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:28:41,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:28:41,752 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 130 proven. 97 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:28:41,753 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:28:41,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257291446] [2021-06-12 19:28:41,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257291446] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:28:41,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012774735] [2021-06-12 19:28:41,753 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-12 19:28:41,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:28:41,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:28:41,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:28:41,885 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 131 proven. 97 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:28:41,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1012774735] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:28:41,886 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:28:41,886 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 15 [2021-06-12 19:28:41,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176668896] [2021-06-12 19:28:41,886 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:28:41,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:28:41,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:28:41,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:28:41,886 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) [2021-06-12 19:28:42,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:28:42,198 INFO L93 Difference]: Finished difference Result 29232 states and 72460 transitions. [2021-06-12 19:28:42,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 19:28:42,199 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 [2021-06-12 19:28:42,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:28:42,237 INFO L225 Difference]: With dead ends: 29232 [2021-06-12 19:28:42,237 INFO L226 Difference]: Without dead ends: 29232 [2021-06-12 19:28:42,237 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 135.2ms TimeCoverageRelationStatistics Valid=161, Invalid=259, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:28:42,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29232 states. [2021-06-12 19:28:42,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29232 to 21133. [2021-06-12 19:28:42,664 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) [2021-06-12 19:28:42,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21133 states to 21133 states and 55817 transitions. [2021-06-12 19:28:42,695 INFO L78 Accepts]: Start accepts. Automaton has 21133 states and 55817 transitions. Word has length 65 [2021-06-12 19:28:42,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:28:42,695 INFO L482 AbstractCegarLoop]: Abstraction has 21133 states and 55817 transitions. [2021-06-12 19:28:42,695 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) [2021-06-12 19:28:42,695 INFO L276 IsEmpty]: Start isEmpty. Operand 21133 states and 55817 transitions. [2021-06-12 19:28:42,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-12 19:28:42,709 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:28:42,709 INFO L472 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:28:42,909 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 587 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1257 [2021-06-12 19:28:42,909 INFO L430 AbstractCegarLoop]: === Iteration 596 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:28:42,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:28:42,909 INFO L82 PathProgramCache]: Analyzing trace with hash 447791127, now seen corresponding path program 362 times [2021-06-12 19:28:42,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:28:42,909 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22510632] [2021-06-12 19:28:42,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:28:42,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:28:43,021 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 88 proven. 139 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:28:43,021 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:28:43,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22510632] [2021-06-12 19:28:43,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22510632] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:28:43,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592089427] [2021-06-12 19:28:43,021 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 [2021-06-12 19:28:43,051 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:28:43,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:28:43,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:28:43,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:28:43,145 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 88 proven. 139 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:28:43,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1592089427] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:28:43,145 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:28:43,145 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-06-12 19:28:43,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807337826] [2021-06-12 19:28:43,146 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:28:43,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:28:43,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:28:43,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:28:43,146 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) [2021-06-12 19:28:43,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:28:43,417 INFO L93 Difference]: Finished difference Result 24649 states and 61830 transitions. [2021-06-12 19:28:43,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:28:43,418 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 [2021-06-12 19:28:43,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:28:43,451 INFO L225 Difference]: With dead ends: 24649 [2021-06-12 19:28:43,451 INFO L226 Difference]: Without dead ends: 24622 [2021-06-12 19:28:43,451 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 123.7ms TimeCoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:28:43,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24622 states. [2021-06-12 19:28:43,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24622 to 21133. [2021-06-12 19:28:43,737 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) [2021-06-12 19:28:43,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21133 states to 21133 states and 55805 transitions. [2021-06-12 19:28:43,769 INFO L78 Accepts]: Start accepts. Automaton has 21133 states and 55805 transitions. Word has length 65 [2021-06-12 19:28:43,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:28:43,769 INFO L482 AbstractCegarLoop]: Abstraction has 21133 states and 55805 transitions. [2021-06-12 19:28:43,769 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) [2021-06-12 19:28:43,769 INFO L276 IsEmpty]: Start isEmpty. Operand 21133 states and 55805 transitions. [2021-06-12 19:28:43,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-12 19:28:43,783 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:28:43,783 INFO L472 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:28:43,983 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1258,588 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:28:43,984 INFO L430 AbstractCegarLoop]: === Iteration 597 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:28:43,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:28:43,984 INFO L82 PathProgramCache]: Analyzing trace with hash -275453914, now seen corresponding path program 176 times [2021-06-12 19:28:43,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:28:43,984 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401305852] [2021-06-12 19:28:43,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:28:43,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:28:44,091 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 10 proven. 213 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:28:44,091 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:28:44,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401305852] [2021-06-12 19:28:44,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401305852] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:28:44,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898804632] [2021-06-12 19:28:44,091 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 [2021-06-12 19:28:44,121 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:28:44,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:28:44,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-12 19:28:44,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:28:44,216 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 9 proven. 214 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:28:44,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1898804632] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:28:44,216 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:28:44,216 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-12 19:28:44,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979818021] [2021-06-12 19:28:44,216 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:28:44,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:28:44,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:28:44,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:28:44,216 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) [2021-06-12 19:28:44,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:28:44,897 INFO L93 Difference]: Finished difference Result 23655 states and 60711 transitions. [2021-06-12 19:28:44,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 19:28:44,898 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 [2021-06-12 19:28:44,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:28:44,925 INFO L225 Difference]: With dead ends: 23655 [2021-06-12 19:28:44,925 INFO L226 Difference]: Without dead ends: 23612 [2021-06-12 19:28:44,925 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 70 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 174.8ms TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:28:44,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23612 states. [2021-06-12 19:28:45,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23612 to 21337. [2021-06-12 19:28:45,244 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) [2021-06-12 19:28:45,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21337 states to 21337 states and 56318 transitions. [2021-06-12 19:28:45,279 INFO L78 Accepts]: Start accepts. Automaton has 21337 states and 56318 transitions. Word has length 65 [2021-06-12 19:28:45,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:28:45,279 INFO L482 AbstractCegarLoop]: Abstraction has 21337 states and 56318 transitions. [2021-06-12 19:28:45,280 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) [2021-06-12 19:28:45,280 INFO L276 IsEmpty]: Start isEmpty. Operand 21337 states and 56318 transitions. [2021-06-12 19:28:45,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-12 19:28:45,296 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:28:45,296 INFO L472 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:28:45,496 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1263,589 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:28:45,496 INFO L430 AbstractCegarLoop]: === Iteration 598 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:28:45,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:28:45,496 INFO L82 PathProgramCache]: Analyzing trace with hash -1829150771, now seen corresponding path program 363 times [2021-06-12 19:28:45,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:28:45,497 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976407697] [2021-06-12 19:28:45,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:28:45,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:28:45,563 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 79 proven. 144 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-12 19:28:45,563 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:28:45,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976407697] [2021-06-12 19:28:45,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976407697] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:28:45,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240249982] [2021-06-12 19:28:45,563 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-12 19:28:45,599 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-06-12 19:28:45,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:28:45,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:28:45,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:28:45,693 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 79 proven. 144 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-12 19:28:45,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [240249982] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:28:45,693 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:28:45,693 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-12 19:28:45,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967085165] [2021-06-12 19:28:45,693 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 19:28:45,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:28:45,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 19:28:45,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:28:45,693 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) [2021-06-12 19:28:45,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:28:45,933 INFO L93 Difference]: Finished difference Result 25552 states and 63612 transitions. [2021-06-12 19:28:45,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:28:45,934 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 [2021-06-12 19:28:45,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:28:45,971 INFO L225 Difference]: With dead ends: 25552 [2021-06-12 19:28:45,971 INFO L226 Difference]: Without dead ends: 25549 [2021-06-12 19:28:45,971 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 60.3ms TimeCoverageRelationStatistics Valid=65, Invalid=91, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:28:46,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25549 states. [2021-06-12 19:28:46,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25549 to 21311. [2021-06-12 19:28:46,282 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) [2021-06-12 19:28:46,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21311 states to 21311 states and 56220 transitions. [2021-06-12 19:28:46,314 INFO L78 Accepts]: Start accepts. Automaton has 21311 states and 56220 transitions. Word has length 65 [2021-06-12 19:28:46,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:28:46,314 INFO L482 AbstractCegarLoop]: Abstraction has 21311 states and 56220 transitions. [2021-06-12 19:28:46,314 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) [2021-06-12 19:28:46,314 INFO L276 IsEmpty]: Start isEmpty. Operand 21311 states and 56220 transitions. [2021-06-12 19:28:46,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-12 19:28:46,329 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:28:46,329 INFO L472 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:28:46,529 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 590 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1264 [2021-06-12 19:28:46,530 INFO L430 AbstractCegarLoop]: === Iteration 599 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:28:46,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:28:46,530 INFO L82 PathProgramCache]: Analyzing trace with hash -1622088205, now seen corresponding path program 364 times [2021-06-12 19:28:46,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:28:46,530 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691742019] [2021-06-12 19:28:46,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:28:46,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:28:46,604 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 74 proven. 149 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-12 19:28:46,604 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:28:46,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691742019] [2021-06-12 19:28:46,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691742019] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:28:46,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856887775] [2021-06-12 19:28:46,604 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 [2021-06-12 19:28:46,634 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:28:46,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:28:46,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:28:46,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:28:46,725 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 74 proven. 149 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-12 19:28:46,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1856887775] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:28:46,725 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:28:46,725 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-06-12 19:28:46,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216584407] [2021-06-12 19:28:46,726 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:28:46,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:28:46,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:28:46,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:28:46,726 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) [2021-06-12 19:28:47,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:28:47,006 INFO L93 Difference]: Finished difference Result 25562 states and 63563 transitions. [2021-06-12 19:28:47,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:28:47,006 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 [2021-06-12 19:28:47,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:28:47,041 INFO L225 Difference]: With dead ends: 25562 [2021-06-12 19:28:47,041 INFO L226 Difference]: Without dead ends: 25544 [2021-06-12 19:28:47,041 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 83.7ms TimeCoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:28:47,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25544 states. [2021-06-12 19:28:47,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25544 to 21311. [2021-06-12 19:28:47,409 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) [2021-06-12 19:28:47,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21311 states to 21311 states and 56192 transitions. [2021-06-12 19:28:47,445 INFO L78 Accepts]: Start accepts. Automaton has 21311 states and 56192 transitions. Word has length 65 [2021-06-12 19:28:47,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:28:47,445 INFO L482 AbstractCegarLoop]: Abstraction has 21311 states and 56192 transitions. [2021-06-12 19:28:47,445 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) [2021-06-12 19:28:47,445 INFO L276 IsEmpty]: Start isEmpty. Operand 21311 states and 56192 transitions. [2021-06-12 19:28:47,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-12 19:28:47,461 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:28:47,461 INFO L472 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:28:47,661 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 591 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1266 [2021-06-12 19:28:47,662 INFO L430 AbstractCegarLoop]: === Iteration 600 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:28:47,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:28:47,662 INFO L82 PathProgramCache]: Analyzing trace with hash 1224879078, now seen corresponding path program 365 times [2021-06-12 19:28:47,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:28:47,662 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941142562] [2021-06-12 19:28:47,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:28:47,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:28:47,770 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 22 proven. 201 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:28:47,771 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:28:47,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941142562] [2021-06-12 19:28:47,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941142562] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:28:47,771 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919551703] [2021-06-12 19:28:47,771 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 [2021-06-12 19:28:47,806 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2021-06-12 19:28:47,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:28:47,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-12 19:28:47,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:28:47,912 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 17 proven. 206 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:28:47,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [919551703] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:28:47,912 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:28:47,912 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-12 19:28:47,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797385810] [2021-06-12 19:28:47,913 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:28:47,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:28:47,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:28:47,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:28:47,913 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) [2021-06-12 19:28:48,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:28:48,831 INFO L93 Difference]: Finished difference Result 22721 states and 58670 transitions. [2021-06-12 19:28:48,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 19:28:48,831 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 [2021-06-12 19:28:48,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:28:48,856 INFO L225 Difference]: With dead ends: 22721 [2021-06-12 19:28:48,856 INFO L226 Difference]: Without dead ends: 22647 [2021-06-12 19:28:48,856 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 70 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 178.6ms TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:28:48,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22647 states. [2021-06-12 19:28:49,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22647 to 21285. [2021-06-12 19:28:49,132 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) [2021-06-12 19:28:49,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21285 states to 21285 states and 56071 transitions. [2021-06-12 19:28:49,167 INFO L78 Accepts]: Start accepts. Automaton has 21285 states and 56071 transitions. Word has length 65 [2021-06-12 19:28:49,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:28:49,167 INFO L482 AbstractCegarLoop]: Abstraction has 21285 states and 56071 transitions. [2021-06-12 19:28:49,168 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) [2021-06-12 19:28:49,168 INFO L276 IsEmpty]: Start isEmpty. Operand 21285 states and 56071 transitions. [2021-06-12 19:28:49,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-12 19:28:49,183 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:28:49,183 INFO L472 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:28:49,383 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 592 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1269 [2021-06-12 19:28:49,383 INFO L430 AbstractCegarLoop]: === Iteration 601 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:28:49,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:28:49,383 INFO L82 PathProgramCache]: Analyzing trace with hash 611342898, now seen corresponding path program 366 times [2021-06-12 19:28:49,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:28:49,384 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132207780] [2021-06-12 19:28:49,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:28:49,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:28:49,492 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 19 proven. 202 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-12 19:28:49,492 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:28:49,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132207780] [2021-06-12 19:28:49,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132207780] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:28:49,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385404939] [2021-06-12 19:28:49,492 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 [2021-06-12 19:28:49,527 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-06-12 19:28:49,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:28:49,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-12 19:28:49,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:28:49,623 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 18 proven. 203 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-12 19:28:49,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1385404939] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:28:49,623 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:28:49,623 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-12 19:28:49,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173590409] [2021-06-12 19:28:49,623 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:28:49,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:28:49,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:28:49,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:28:49,624 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) [2021-06-12 19:28:50,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:28:50,346 INFO L93 Difference]: Finished difference Result 23377 states and 60094 transitions. [2021-06-12 19:28:50,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 19:28:50,346 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 [2021-06-12 19:28:50,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:28:50,371 INFO L225 Difference]: With dead ends: 23377 [2021-06-12 19:28:50,371 INFO L226 Difference]: Without dead ends: 23365 [2021-06-12 19:28:50,371 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 70 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 174.7ms TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:28:50,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23365 states. [2021-06-12 19:28:50,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23365 to 21337. [2021-06-12 19:28:50,648 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) [2021-06-12 19:28:50,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21337 states to 21337 states and 56187 transitions. [2021-06-12 19:28:50,683 INFO L78 Accepts]: Start accepts. Automaton has 21337 states and 56187 transitions. Word has length 65 [2021-06-12 19:28:50,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:28:50,683 INFO L482 AbstractCegarLoop]: Abstraction has 21337 states and 56187 transitions. [2021-06-12 19:28:50,683 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) [2021-06-12 19:28:50,683 INFO L276 IsEmpty]: Start isEmpty. Operand 21337 states and 56187 transitions. [2021-06-12 19:28:50,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-12 19:28:50,699 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:28:50,699 INFO L472 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:28:50,899 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1270,593 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:28:50,899 INFO L430 AbstractCegarLoop]: === Iteration 602 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:28:50,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:28:50,899 INFO L82 PathProgramCache]: Analyzing trace with hash 454043411, now seen corresponding path program 177 times [2021-06-12 19:28:50,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:28:50,899 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764285811] [2021-06-12 19:28:50,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:28:50,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:28:50,974 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 143 proven. 83 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:28:50,974 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:28:50,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764285811] [2021-06-12 19:28:50,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764285811] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:28:50,975 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125271904] [2021-06-12 19:28:50,975 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 [2021-06-12 19:28:51,010 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-06-12 19:28:51,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:28:51,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:28:51,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:28:51,108 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 145 proven. 83 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:28:51,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2125271904] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:28:51,109 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:28:51,109 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 13 [2021-06-12 19:28:51,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906366320] [2021-06-12 19:28:51,109 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:28:51,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:28:51,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:28:51,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:28:51,109 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) [2021-06-12 19:28:51,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:28:51,392 INFO L93 Difference]: Finished difference Result 27785 states and 69129 transitions. [2021-06-12 19:28:51,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:28:51,392 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 [2021-06-12 19:28:51,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:28:51,427 INFO L225 Difference]: With dead ends: 27785 [2021-06-12 19:28:51,427 INFO L226 Difference]: Without dead ends: 27755 [2021-06-12 19:28:51,428 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 90.1ms TimeCoverageRelationStatistics Valid=102, Invalid=170, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:28:51,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27755 states. [2021-06-12 19:28:51,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27755 to 21784. [2021-06-12 19:28:51,756 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) [2021-06-12 19:28:51,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21784 states to 21784 states and 57489 transitions. [2021-06-12 19:28:51,796 INFO L78 Accepts]: Start accepts. Automaton has 21784 states and 57489 transitions. Word has length 65 [2021-06-12 19:28:51,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:28:51,796 INFO L482 AbstractCegarLoop]: Abstraction has 21784 states and 57489 transitions. [2021-06-12 19:28:51,796 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) [2021-06-12 19:28:51,796 INFO L276 IsEmpty]: Start isEmpty. Operand 21784 states and 57489 transitions. [2021-06-12 19:28:51,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-12 19:28:51,813 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:28:51,813 INFO L472 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:28:52,013 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1271,594 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:28:52,013 INFO L430 AbstractCegarLoop]: === Iteration 603 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:28:52,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:28:52,013 INFO L82 PathProgramCache]: Analyzing trace with hash -1541707064, now seen corresponding path program 367 times [2021-06-12 19:28:52,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:28:52,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109380460] [2021-06-12 19:28:52,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:28:52,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:28:52,136 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 19 proven. 204 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:28:52,136 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:28:52,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109380460] [2021-06-12 19:28:52,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109380460] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:28:52,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446225412] [2021-06-12 19:28:52,136 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 [2021-06-12 19:28:52,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:28:52,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-12 19:28:52,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:28:52,262 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 18 proven. 205 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:28:52,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1446225412] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:28:52,262 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:28:52,262 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-12 19:28:52,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000245237] [2021-06-12 19:28:52,262 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:28:52,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:28:52,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:28:52,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:28:52,262 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) [2021-06-12 19:28:53,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:28:53,166 INFO L93 Difference]: Finished difference Result 25899 states and 65956 transitions. [2021-06-12 19:28:53,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-12 19:28:53,166 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 [2021-06-12 19:28:53,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:28:53,202 INFO L225 Difference]: With dead ends: 25899 [2021-06-12 19:28:53,202 INFO L226 Difference]: Without dead ends: 25845 [2021-06-12 19:28:53,202 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 70 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 257.6ms TimeCoverageRelationStatistics Valid=99, Invalid=713, Unknown=0, NotChecked=0, Total=812 [2021-06-12 19:28:53,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25845 states. [2021-06-12 19:28:53,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25845 to 21962. [2021-06-12 19:28:53,485 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) [2021-06-12 19:28:53,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21962 states to 21962 states and 57960 transitions. [2021-06-12 19:28:53,522 INFO L78 Accepts]: Start accepts. Automaton has 21962 states and 57960 transitions. Word has length 65 [2021-06-12 19:28:53,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:28:53,522 INFO L482 AbstractCegarLoop]: Abstraction has 21962 states and 57960 transitions. [2021-06-12 19:28:53,522 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) [2021-06-12 19:28:53,522 INFO L276 IsEmpty]: Start isEmpty. Operand 21962 states and 57960 transitions. [2021-06-12 19:28:53,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-12 19:28:53,538 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:28:53,538 INFO L472 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:28:53,738 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1274,595 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:28:53,738 INFO L430 AbstractCegarLoop]: === Iteration 604 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:28:53,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:28:53,738 INFO L82 PathProgramCache]: Analyzing trace with hash -9147955, now seen corresponding path program 368 times [2021-06-12 19:28:53,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:28:53,739 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589054719] [2021-06-12 19:28:53,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:28:53,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:28:53,823 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 69 proven. 157 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:28:53,823 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:28:53,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589054719] [2021-06-12 19:28:53,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589054719] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:28:53,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966525123] [2021-06-12 19:28:53,823 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 [2021-06-12 19:28:53,853 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:28:53,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:28:53,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:28:53,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:28:53,948 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 69 proven. 157 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:28:53,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [966525123] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:28:53,948 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:28:53,948 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-06-12 19:28:53,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603116384] [2021-06-12 19:28:53,948 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:28:53,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:28:53,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:28:53,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:28:53,949 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) [2021-06-12 19:28:54,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:28:54,201 INFO L93 Difference]: Finished difference Result 26218 states and 65296 transitions. [2021-06-12 19:28:54,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:28:54,201 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 [2021-06-12 19:28:54,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:28:54,235 INFO L225 Difference]: With dead ends: 26218 [2021-06-12 19:28:54,235 INFO L226 Difference]: Without dead ends: 26194 [2021-06-12 19:28:54,235 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 94.4ms TimeCoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:28:54,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26194 states. [2021-06-12 19:28:54,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26194 to 21962. [2021-06-12 19:28:54,552 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) [2021-06-12 19:28:54,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21962 states to 21962 states and 57943 transitions. [2021-06-12 19:28:54,588 INFO L78 Accepts]: Start accepts. Automaton has 21962 states and 57943 transitions. Word has length 65 [2021-06-12 19:28:54,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:28:54,588 INFO L482 AbstractCegarLoop]: Abstraction has 21962 states and 57943 transitions. [2021-06-12 19:28:54,588 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) [2021-06-12 19:28:54,588 INFO L276 IsEmpty]: Start isEmpty. Operand 21962 states and 57943 transitions. [2021-06-12 19:28:54,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-12 19:28:54,602 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:28:54,602 INFO L472 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:28:54,802 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 596 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1275 [2021-06-12 19:28:54,802 INFO L430 AbstractCegarLoop]: === Iteration 605 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:28:54,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:28:54,803 INFO L82 PathProgramCache]: Analyzing trace with hash -1386870530, now seen corresponding path program 369 times [2021-06-12 19:28:54,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:28:54,803 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501402133] [2021-06-12 19:28:54,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:28:54,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:28:54,918 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 19 proven. 204 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:28:54,918 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:28:54,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501402133] [2021-06-12 19:28:54,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501402133] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:28:54,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676597711] [2021-06-12 19:28:54,918 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 [2021-06-12 19:28:54,953 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-06-12 19:28:54,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:28:54,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-12 19:28:54,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:28:55,046 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 18 proven. 205 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:28:55,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [676597711] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:28:55,046 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:28:55,046 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-12 19:28:55,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983224541] [2021-06-12 19:28:55,046 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:28:55,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:28:55,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:28:55,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:28:55,046 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) [2021-06-12 19:28:56,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:28:56,158 INFO L93 Difference]: Finished difference Result 29175 states and 73161 transitions. [2021-06-12 19:28:56,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-12 19:28:56,158 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 [2021-06-12 19:28:56,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:28:56,199 INFO L225 Difference]: With dead ends: 29175 [2021-06-12 19:28:56,199 INFO L226 Difference]: Without dead ends: 29061 [2021-06-12 19:28:56,200 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 69 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 379.7ms TimeCoverageRelationStatistics Valid=189, Invalid=1451, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 19:28:56,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29061 states. [2021-06-12 19:28:56,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29061 to 22155. [2021-06-12 19:28:56,540 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) [2021-06-12 19:28:56,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22155 states to 22155 states and 58457 transitions. [2021-06-12 19:28:56,579 INFO L78 Accepts]: Start accepts. Automaton has 22155 states and 58457 transitions. Word has length 65 [2021-06-12 19:28:56,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:28:56,579 INFO L482 AbstractCegarLoop]: Abstraction has 22155 states and 58457 transitions. [2021-06-12 19:28:56,580 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) [2021-06-12 19:28:56,580 INFO L276 IsEmpty]: Start isEmpty. Operand 22155 states and 58457 transitions. [2021-06-12 19:28:56,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-12 19:28:56,596 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:28:56,596 INFO L472 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:28:56,796 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 597 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1279 [2021-06-12 19:28:56,796 INFO L430 AbstractCegarLoop]: === Iteration 606 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:28:56,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:28:56,796 INFO L82 PathProgramCache]: Analyzing trace with hash -1000267853, now seen corresponding path program 370 times [2021-06-12 19:28:56,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:28:56,796 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1742046619] [2021-06-12 19:28:56,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:28:56,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:28:56,899 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 70 proven. 156 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:28:56,899 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:28:56,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1742046619] [2021-06-12 19:28:56,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1742046619] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:28:56,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107222643] [2021-06-12 19:28:56,899 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 [2021-06-12 19:28:56,929 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:28:56,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:28:56,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:28:56,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:28:57,023 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 70 proven. 156 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:28:57,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107222643] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:28:57,023 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:28:57,023 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-06-12 19:28:57,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367453498] [2021-06-12 19:28:57,024 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:28:57,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:28:57,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:28:57,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:28:57,024 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) [2021-06-12 19:28:57,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:28:57,336 INFO L93 Difference]: Finished difference Result 26448 states and 65859 transitions. [2021-06-12 19:28:57,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:28:57,337 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 [2021-06-12 19:28:57,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:28:57,373 INFO L225 Difference]: With dead ends: 26448 [2021-06-12 19:28:57,373 INFO L226 Difference]: Without dead ends: 26415 [2021-06-12 19:28:57,373 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 118.4ms TimeCoverageRelationStatistics Valid=106, Invalid=236, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:28:57,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26415 states. [2021-06-12 19:28:57,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26415 to 21652. [2021-06-12 19:28:57,819 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) [2021-06-12 19:28:57,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21652 states to 21652 states and 57019 transitions. [2021-06-12 19:28:57,860 INFO L78 Accepts]: Start accepts. Automaton has 21652 states and 57019 transitions. Word has length 65 [2021-06-12 19:28:57,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:28:57,860 INFO L482 AbstractCegarLoop]: Abstraction has 21652 states and 57019 transitions. [2021-06-12 19:28:57,860 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) [2021-06-12 19:28:57,860 INFO L276 IsEmpty]: Start isEmpty. Operand 21652 states and 57019 transitions. [2021-06-12 19:28:57,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-12 19:28:57,876 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:28:57,876 INFO L472 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:28:58,076 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1280,598 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:28:58,077 INFO L430 AbstractCegarLoop]: === Iteration 607 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:28:58,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:28:58,077 INFO L82 PathProgramCache]: Analyzing trace with hash -1446562040, now seen corresponding path program 371 times [2021-06-12 19:28:58,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:28:58,077 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259752974] [2021-06-12 19:28:58,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:28:58,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:28:58,203 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 18 proven. 207 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:28:58,203 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:28:58,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259752974] [2021-06-12 19:28:58,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259752974] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:28:58,203 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397737867] [2021-06-12 19:28:58,203 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 [2021-06-12 19:28:58,239 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-06-12 19:28:58,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:28:58,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-12 19:28:58,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:28:58,331 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 18 proven. 207 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:28:58,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [397737867] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:28:58,331 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:28:58,331 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-12 19:28:58,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586778630] [2021-06-12 19:28:58,332 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:28:58,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:28:58,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:28:58,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:28:58,332 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) [2021-06-12 19:28:59,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:28:59,261 INFO L93 Difference]: Finished difference Result 27644 states and 69399 transitions. [2021-06-12 19:28:59,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-12 19:28:59,261 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 [2021-06-12 19:28:59,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:28:59,292 INFO L225 Difference]: With dead ends: 27644 [2021-06-12 19:28:59,292 INFO L226 Difference]: Without dead ends: 27488 [2021-06-12 19:28:59,292 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 68 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 287.1ms TimeCoverageRelationStatistics Valid=119, Invalid=811, Unknown=0, NotChecked=0, Total=930 [2021-06-12 19:28:59,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27488 states. [2021-06-12 19:28:59,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27488 to 21271. [2021-06-12 19:28:59,593 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) [2021-06-12 19:28:59,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21271 states to 21271 states and 55956 transitions. [2021-06-12 19:28:59,631 INFO L78 Accepts]: Start accepts. Automaton has 21271 states and 55956 transitions. Word has length 65 [2021-06-12 19:28:59,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:28:59,631 INFO L482 AbstractCegarLoop]: Abstraction has 21271 states and 55956 transitions. [2021-06-12 19:28:59,631 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) [2021-06-12 19:28:59,631 INFO L276 IsEmpty]: Start isEmpty. Operand 21271 states and 55956 transitions. [2021-06-12 19:28:59,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-12 19:28:59,646 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:28:59,646 INFO L472 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:28:59,846 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1285,599 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:28:59,847 INFO L430 AbstractCegarLoop]: === Iteration 608 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:28:59,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:28:59,847 INFO L82 PathProgramCache]: Analyzing trace with hash 1988463329, now seen corresponding path program 178 times [2021-06-12 19:28:59,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:28:59,847 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282107355] [2021-06-12 19:28:59,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:28:59,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:28:59,921 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 167 proven. 59 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:28:59,921 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:28:59,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282107355] [2021-06-12 19:28:59,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282107355] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:28:59,922 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453114664] [2021-06-12 19:28:59,922 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-12 19:28:59,951 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:28:59,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:28:59,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:28:59,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:29:00,052 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 168 proven. 59 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:29:00,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1453114664] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:29:00,052 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:29:00,052 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 13 [2021-06-12 19:29:00,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007363252] [2021-06-12 19:29:00,052 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:29:00,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:29:00,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:29:00,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=107, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:29:00,053 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) [2021-06-12 19:29:00,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:29:00,361 INFO L93 Difference]: Finished difference Result 33905 states and 83190 transitions. [2021-06-12 19:29:00,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:29:00,362 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 [2021-06-12 19:29:00,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:29:00,401 INFO L225 Difference]: With dead ends: 33905 [2021-06-12 19:29:00,401 INFO L226 Difference]: Without dead ends: 33905 [2021-06-12 19:29:00,401 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 100.2ms TimeCoverageRelationStatistics Valid=131, Invalid=175, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:29:00,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33905 states. [2021-06-12 19:29:00,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33905 to 21594. [2021-06-12 19:29:00,802 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) [2021-06-12 19:29:00,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21594 states to 21594 states and 56953 transitions. [2021-06-12 19:29:00,839 INFO L78 Accepts]: Start accepts. Automaton has 21594 states and 56953 transitions. Word has length 65 [2021-06-12 19:29:00,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:29:00,840 INFO L482 AbstractCegarLoop]: Abstraction has 21594 states and 56953 transitions. [2021-06-12 19:29:00,840 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) [2021-06-12 19:29:00,840 INFO L276 IsEmpty]: Start isEmpty. Operand 21594 states and 56953 transitions. [2021-06-12 19:29:00,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-12 19:29:00,856 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:29:00,856 INFO L472 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:29:01,056 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 600 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1286 [2021-06-12 19:29:01,056 INFO L430 AbstractCegarLoop]: === Iteration 609 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:29:01,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:29:01,057 INFO L82 PathProgramCache]: Analyzing trace with hash 350890873, now seen corresponding path program 179 times [2021-06-12 19:29:01,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:29:01,057 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985963023] [2021-06-12 19:29:01,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:29:01,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:29:01,142 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 163 proven. 63 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:29:01,143 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:29:01,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985963023] [2021-06-12 19:29:01,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985963023] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:29:01,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807297304] [2021-06-12 19:29:01,143 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 [2021-06-12 19:29:01,181 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-06-12 19:29:01,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:29:01,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:29:01,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:29:01,380 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 165 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:29:01,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1807297304] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:29:01,381 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:29:01,381 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 20] total 23 [2021-06-12 19:29:01,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161016375] [2021-06-12 19:29:01,381 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-12 19:29:01,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:29:01,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-12 19:29:01,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=367, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:29:01,381 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) [2021-06-12 19:29:01,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:29:01,990 INFO L93 Difference]: Finished difference Result 37416 states and 91139 transitions. [2021-06-12 19:29:01,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-12 19:29:01,991 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 [2021-06-12 19:29:01,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:29:02,040 INFO L225 Difference]: With dead ends: 37416 [2021-06-12 19:29:02,040 INFO L226 Difference]: Without dead ends: 37416 [2021-06-12 19:29:02,040 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 335.4ms TimeCoverageRelationStatistics Valid=476, Invalid=784, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 19:29:02,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37416 states. [2021-06-12 19:29:02,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37416 to 21628. [2021-06-12 19:29:02,433 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) [2021-06-12 19:29:02,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21628 states to 21628 states and 57031 transitions. [2021-06-12 19:29:02,469 INFO L78 Accepts]: Start accepts. Automaton has 21628 states and 57031 transitions. Word has length 65 [2021-06-12 19:29:02,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:29:02,469 INFO L482 AbstractCegarLoop]: Abstraction has 21628 states and 57031 transitions. [2021-06-12 19:29:02,469 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) [2021-06-12 19:29:02,470 INFO L276 IsEmpty]: Start isEmpty. Operand 21628 states and 57031 transitions. [2021-06-12 19:29:02,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-12 19:29:02,485 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:29:02,485 INFO L472 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:29:02,685 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 601 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1287 [2021-06-12 19:29:02,686 INFO L430 AbstractCegarLoop]: === Iteration 610 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:29:02,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:29:02,686 INFO L82 PathProgramCache]: Analyzing trace with hash -1339104291, now seen corresponding path program 180 times [2021-06-12 19:29:02,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:29:02,686 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907824805] [2021-06-12 19:29:02,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:29:02,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:29:02,780 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 147 proven. 79 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:29:02,781 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:29:02,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907824805] [2021-06-12 19:29:02,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907824805] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:29:02,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286911455] [2021-06-12 19:29:02,781 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 [2021-06-12 19:29:02,922 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2021-06-12 19:29:02,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:29:02,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:29:02,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:29:03,023 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 148 proven. 79 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:29:03,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [286911455] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:29:03,023 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:29:03,023 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 15 [2021-06-12 19:29:03,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850948266] [2021-06-12 19:29:03,023 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:29:03,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:29:03,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:29:03,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:29:03,024 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) [2021-06-12 19:29:03,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:29:03,419 INFO L93 Difference]: Finished difference Result 33319 states and 81655 transitions. [2021-06-12 19:29:03,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 19:29:03,419 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 [2021-06-12 19:29:03,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:29:03,465 INFO L225 Difference]: With dead ends: 33319 [2021-06-12 19:29:03,465 INFO L226 Difference]: Without dead ends: 33319 [2021-06-12 19:29:03,465 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 156.8ms TimeCoverageRelationStatistics Valid=217, Invalid=335, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:29:03,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33319 states. [2021-06-12 19:29:03,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33319 to 21577. [2021-06-12 19:29:03,793 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) [2021-06-12 19:29:03,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21577 states to 21577 states and 56863 transitions. [2021-06-12 19:29:03,827 INFO L78 Accepts]: Start accepts. Automaton has 21577 states and 56863 transitions. Word has length 65 [2021-06-12 19:29:03,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:29:03,827 INFO L482 AbstractCegarLoop]: Abstraction has 21577 states and 56863 transitions. [2021-06-12 19:29:03,827 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) [2021-06-12 19:29:03,827 INFO L276 IsEmpty]: Start isEmpty. Operand 21577 states and 56863 transitions. [2021-06-12 19:29:03,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-12 19:29:03,841 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:29:03,841 INFO L472 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:29:04,041 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1288,602 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:29:04,042 INFO L430 AbstractCegarLoop]: === Iteration 611 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:29:04,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:29:04,042 INFO L82 PathProgramCache]: Analyzing trace with hash 1916575993, now seen corresponding path program 181 times [2021-06-12 19:29:04,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:29:04,042 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637316652] [2021-06-12 19:29:04,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:29:04,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:29:04,151 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 131 proven. 96 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:29:04,151 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:29:04,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637316652] [2021-06-12 19:29:04,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637316652] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:29:04,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811337871] [2021-06-12 19:29:04,151 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 [2021-06-12 19:29:04,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:29:04,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:29:04,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:29:04,285 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 132 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:29:04,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [811337871] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:29:04,285 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:29:04,285 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 16 [2021-06-12 19:29:04,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543990324] [2021-06-12 19:29:04,286 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:29:04,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:29:04,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:29:04,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:29:04,286 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) [2021-06-12 19:29:04,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:29:04,727 INFO L93 Difference]: Finished difference Result 28453 states and 70741 transitions. [2021-06-12 19:29:04,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:29:04,728 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 [2021-06-12 19:29:04,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:29:04,763 INFO L225 Difference]: With dead ends: 28453 [2021-06-12 19:29:04,763 INFO L226 Difference]: Without dead ends: 28453 [2021-06-12 19:29:04,764 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 165.2ms TimeCoverageRelationStatistics Valid=206, Invalid=346, Unknown=0, NotChecked=0, Total=552 [2021-06-12 19:29:04,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28453 states. [2021-06-12 19:29:05,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28453 to 21132. [2021-06-12 19:29:05,141 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) [2021-06-12 19:29:05,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21132 states to 21132 states and 55594 transitions. [2021-06-12 19:29:05,177 INFO L78 Accepts]: Start accepts. Automaton has 21132 states and 55594 transitions. Word has length 65 [2021-06-12 19:29:05,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:29:05,177 INFO L482 AbstractCegarLoop]: Abstraction has 21132 states and 55594 transitions. [2021-06-12 19:29:05,177 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) [2021-06-12 19:29:05,177 INFO L276 IsEmpty]: Start isEmpty. Operand 21132 states and 55594 transitions. [2021-06-12 19:29:05,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-12 19:29:05,192 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:29:05,193 INFO L472 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:29:05,393 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 603 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1289 [2021-06-12 19:29:05,393 INFO L430 AbstractCegarLoop]: === Iteration 612 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:29:05,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:29:05,393 INFO L82 PathProgramCache]: Analyzing trace with hash 447010829, now seen corresponding path program 372 times [2021-06-12 19:29:05,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:29:05,393 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152235341] [2021-06-12 19:29:05,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:29:05,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:29:05,499 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 78 proven. 149 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:29:05,500 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:29:05,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152235341] [2021-06-12 19:29:05,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152235341] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:29:05,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716541324] [2021-06-12 19:29:05,500 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 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 [2021-06-12 19:29:05,533 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-06-12 19:29:05,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:29:05,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:29:05,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:29:05,627 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 78 proven. 149 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:29:05,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [716541324] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:29:05,627 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:29:05,627 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-06-12 19:29:05,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181816317] [2021-06-12 19:29:05,627 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:29:05,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:29:05,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:29:05,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:29:05,627 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) [2021-06-12 19:29:05,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:29:05,986 INFO L93 Difference]: Finished difference Result 25089 states and 62416 transitions. [2021-06-12 19:29:05,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 19:29:05,986 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 [2021-06-12 19:29:05,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:29:06,021 INFO L225 Difference]: With dead ends: 25089 [2021-06-12 19:29:06,021 INFO L226 Difference]: Without dead ends: 25053 [2021-06-12 19:29:06,021 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 135.5ms TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:29:06,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25053 states. [2021-06-12 19:29:06,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25053 to 21132. [2021-06-12 19:29:06,322 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) [2021-06-12 19:29:06,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21132 states to 21132 states and 55585 transitions. [2021-06-12 19:29:06,360 INFO L78 Accepts]: Start accepts. Automaton has 21132 states and 55585 transitions. Word has length 65 [2021-06-12 19:29:06,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:29:06,360 INFO L482 AbstractCegarLoop]: Abstraction has 21132 states and 55585 transitions. [2021-06-12 19:29:06,360 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) [2021-06-12 19:29:06,360 INFO L276 IsEmpty]: Start isEmpty. Operand 21132 states and 55585 transitions. [2021-06-12 19:29:06,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-12 19:29:06,376 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:29:06,376 INFO L472 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:29:06,576 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1290,604 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:29:06,576 INFO L430 AbstractCegarLoop]: === Iteration 613 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:29:06,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:29:06,576 INFO L82 PathProgramCache]: Analyzing trace with hash -749006070, now seen corresponding path program 182 times [2021-06-12 19:29:06,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:29:06,576 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496473240] [2021-06-12 19:29:06,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:29:06,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:29:06,682 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 10 proven. 213 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:29:06,682 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:29:06,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496473240] [2021-06-12 19:29:06,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496473240] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:29:06,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740575186] [2021-06-12 19:29:06,682 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 [2021-06-12 19:29:06,712 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:29:06,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:29:06,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-12 19:29:06,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:29:06,807 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 9 proven. 214 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:29:06,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [740575186] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:29:06,807 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:29:06,807 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-12 19:29:06,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498756655] [2021-06-12 19:29:06,807 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:29:06,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:29:06,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:29:06,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:29:06,807 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) [2021-06-12 19:29:07,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:29:07,494 INFO L93 Difference]: Finished difference Result 23500 states and 60212 transitions. [2021-06-12 19:29:07,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 19:29:07,495 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 [2021-06-12 19:29:07,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:29:07,521 INFO L225 Difference]: With dead ends: 23500 [2021-06-12 19:29:07,521 INFO L226 Difference]: Without dead ends: 23462 [2021-06-12 19:29:07,521 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 70 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 173.3ms TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:29:07,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23462 states. [2021-06-12 19:29:07,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23462 to 21360. [2021-06-12 19:29:07,829 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) [2021-06-12 19:29:07,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21360 states to 21360 states and 56148 transitions. [2021-06-12 19:29:07,867 INFO L78 Accepts]: Start accepts. Automaton has 21360 states and 56148 transitions. Word has length 65 [2021-06-12 19:29:07,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:29:07,867 INFO L482 AbstractCegarLoop]: Abstraction has 21360 states and 56148 transitions. [2021-06-12 19:29:07,867 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) [2021-06-12 19:29:07,867 INFO L276 IsEmpty]: Start isEmpty. Operand 21360 states and 56148 transitions. [2021-06-12 19:29:07,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-12 19:29:07,882 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:29:07,882 INFO L472 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:29:08,082 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1296,605 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:29:08,082 INFO L430 AbstractCegarLoop]: === Iteration 614 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:29:08,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:29:08,083 INFO L82 PathProgramCache]: Analyzing trace with hash 751326922, now seen corresponding path program 373 times [2021-06-12 19:29:08,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:29:08,083 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229945022] [2021-06-12 19:29:08,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:29:08,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:29:08,183 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 22 proven. 201 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:29:08,183 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:29:08,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229945022] [2021-06-12 19:29:08,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229945022] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:29:08,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378097884] [2021-06-12 19:29:08,183 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 [2021-06-12 19:29:08,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:29:08,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-12 19:29:08,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:29:08,322 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 17 proven. 206 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:29:08,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [378097884] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:29:08,323 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:29:08,323 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-12 19:29:08,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551128988] [2021-06-12 19:29:08,323 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:29:08,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:29:08,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:29:08,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:29:08,323 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) [2021-06-12 19:29:09,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:29:09,198 INFO L93 Difference]: Finished difference Result 22708 states and 58520 transitions. [2021-06-12 19:29:09,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 19:29:09,198 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 [2021-06-12 19:29:09,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:29:09,228 INFO L225 Difference]: With dead ends: 22708 [2021-06-12 19:29:09,228 INFO L226 Difference]: Without dead ends: 22616 [2021-06-12 19:29:09,228 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 70 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 173.8ms TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:29:09,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22616 states. [2021-06-12 19:29:09,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22616 to 21349. [2021-06-12 19:29:09,518 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) [2021-06-12 19:29:09,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21349 states to 21349 states and 56050 transitions. [2021-06-12 19:29:09,552 INFO L78 Accepts]: Start accepts. Automaton has 21349 states and 56050 transitions. Word has length 65 [2021-06-12 19:29:09,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:29:09,552 INFO L482 AbstractCegarLoop]: Abstraction has 21349 states and 56050 transitions. [2021-06-12 19:29:09,552 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) [2021-06-12 19:29:09,552 INFO L276 IsEmpty]: Start isEmpty. Operand 21349 states and 56050 transitions. [2021-06-12 19:29:09,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-12 19:29:09,566 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:29:09,566 INFO L472 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:29:09,767 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 606 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1297 [2021-06-12 19:29:09,767 INFO L430 AbstractCegarLoop]: === Iteration 615 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:29:09,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:29:09,767 INFO L82 PathProgramCache]: Analyzing trace with hash 137790742, now seen corresponding path program 374 times [2021-06-12 19:29:09,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:29:09,767 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639689697] [2021-06-12 19:29:09,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:29:09,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:29:09,874 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 19 proven. 202 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-12 19:29:09,874 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:29:09,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639689697] [2021-06-12 19:29:09,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639689697] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:29:09,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528813659] [2021-06-12 19:29:09,874 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-12 19:29:09,904 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:29:09,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:29:09,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-12 19:29:09,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:29:09,999 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 18 proven. 203 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-12 19:29:09,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1528813659] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:29:09,999 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:29:09,999 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-12 19:29:10,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280260483] [2021-06-12 19:29:10,000 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:29:10,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:29:10,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:29:10,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:29:10,000 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) [2021-06-12 19:29:10,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:29:10,774 INFO L93 Difference]: Finished difference Result 23448 states and 60119 transitions. [2021-06-12 19:29:10,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 19:29:10,774 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 [2021-06-12 19:29:10,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:29:10,804 INFO L225 Difference]: With dead ends: 23448 [2021-06-12 19:29:10,804 INFO L226 Difference]: Without dead ends: 23436 [2021-06-12 19:29:10,804 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 70 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 173.7ms TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:29:10,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23436 states. [2021-06-12 19:29:11,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23436 to 21445. [2021-06-12 19:29:11,112 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) [2021-06-12 19:29:11,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21445 states to 21445 states and 56285 transitions. [2021-06-12 19:29:11,153 INFO L78 Accepts]: Start accepts. Automaton has 21445 states and 56285 transitions. Word has length 65 [2021-06-12 19:29:11,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:29:11,153 INFO L482 AbstractCegarLoop]: Abstraction has 21445 states and 56285 transitions. [2021-06-12 19:29:11,153 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) [2021-06-12 19:29:11,153 INFO L276 IsEmpty]: Start isEmpty. Operand 21445 states and 56285 transitions. [2021-06-12 19:29:11,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-12 19:29:11,170 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:29:11,170 INFO L472 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:29:11,370 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 607 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1298 [2021-06-12 19:29:11,370 INFO L430 AbstractCegarLoop]: === Iteration 616 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:29:11,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:29:11,371 INFO L82 PathProgramCache]: Analyzing trace with hash -1510566761, now seen corresponding path program 375 times [2021-06-12 19:29:11,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:29:11,371 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294717980] [2021-06-12 19:29:11,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:29:11,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:29:11,446 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 64 proven. 161 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:29:11,446 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:29:11,446 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294717980] [2021-06-12 19:29:11,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294717980] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:29:11,447 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [881271835] [2021-06-12 19:29:11,447 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 [2021-06-12 19:29:11,482 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-06-12 19:29:11,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:29:11,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:29:11,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:29:11,576 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 64 proven. 161 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:29:11,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [881271835] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:29:11,576 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:29:11,576 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-06-12 19:29:11,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521959946] [2021-06-12 19:29:11,576 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:29:11,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:29:11,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:29:11,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:29:11,576 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) [2021-06-12 19:29:11,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:29:11,832 INFO L93 Difference]: Finished difference Result 26049 states and 64269 transitions. [2021-06-12 19:29:11,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:29:11,832 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 [2021-06-12 19:29:11,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:29:11,867 INFO L225 Difference]: With dead ends: 26049 [2021-06-12 19:29:11,867 INFO L226 Difference]: Without dead ends: 26031 [2021-06-12 19:29:11,867 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 84.5ms TimeCoverageRelationStatistics Valid=90, Invalid=150, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:29:11,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26031 states. [2021-06-12 19:29:12,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26031 to 21412. [2021-06-12 19:29:12,186 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) [2021-06-12 19:29:12,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21412 states to 21412 states and 56153 transitions. [2021-06-12 19:29:12,227 INFO L78 Accepts]: Start accepts. Automaton has 21412 states and 56153 transitions. Word has length 65 [2021-06-12 19:29:12,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:29:12,227 INFO L482 AbstractCegarLoop]: Abstraction has 21412 states and 56153 transitions. [2021-06-12 19:29:12,227 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) [2021-06-12 19:29:12,227 INFO L276 IsEmpty]: Start isEmpty. Operand 21412 states and 56153 transitions. [2021-06-12 19:29:12,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-12 19:29:12,244 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:29:12,244 INFO L472 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:29:12,444 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 608 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1299 [2021-06-12 19:29:12,445 INFO L430 AbstractCegarLoop]: === Iteration 617 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:29:12,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:29:12,445 INFO L82 PathProgramCache]: Analyzing trace with hash -2015259220, now seen corresponding path program 376 times [2021-06-12 19:29:12,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:29:12,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706377914] [2021-06-12 19:29:12,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:29:12,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:29:12,551 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 19 proven. 204 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:29:12,551 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:29:12,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706377914] [2021-06-12 19:29:12,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [706377914] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:29:12,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651105539] [2021-06-12 19:29:12,551 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 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 [2021-06-12 19:29:12,582 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:29:12,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:29:12,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-12 19:29:12,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:29:12,713 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2021-06-12 19:29:12,779 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 18 proven. 205 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:29:12,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [651105539] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:29:12,779 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:29:12,779 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-12 19:29:12,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647309578] [2021-06-12 19:29:12,779 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:29:12,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:29:12,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:29:12,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:29:12,780 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) [2021-06-12 19:29:13,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:29:13,721 INFO L93 Difference]: Finished difference Result 25666 states and 64906 transitions. [2021-06-12 19:29:13,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-12 19:29:13,722 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 [2021-06-12 19:29:13,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:29:13,753 INFO L225 Difference]: With dead ends: 25666 [2021-06-12 19:29:13,753 INFO L226 Difference]: Without dead ends: 25612 [2021-06-12 19:29:13,753 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 70 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 264.8ms TimeCoverageRelationStatistics Valid=111, Invalid=819, Unknown=0, NotChecked=0, Total=930 [2021-06-12 19:29:13,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25612 states. [2021-06-12 19:29:14,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25612 to 21675. [2021-06-12 19:29:14,043 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) [2021-06-12 19:29:14,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21675 states to 21675 states and 56857 transitions. [2021-06-12 19:29:14,082 INFO L78 Accepts]: Start accepts. Automaton has 21675 states and 56857 transitions. Word has length 65 [2021-06-12 19:29:14,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:29:14,082 INFO L482 AbstractCegarLoop]: Abstraction has 21675 states and 56857 transitions. [2021-06-12 19:29:14,082 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) [2021-06-12 19:29:14,082 INFO L276 IsEmpty]: Start isEmpty. Operand 21675 states and 56857 transitions. [2021-06-12 19:29:14,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-12 19:29:14,098 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:29:14,098 INFO L472 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:29:14,298 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 609 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1302 [2021-06-12 19:29:14,299 INFO L430 AbstractCegarLoop]: === Iteration 618 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:29:14,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:29:14,299 INFO L82 PathProgramCache]: Analyzing trace with hash -482700111, now seen corresponding path program 377 times [2021-06-12 19:29:14,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:29:14,299 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802308306] [2021-06-12 19:29:14,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:29:14,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:29:14,383 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 61 proven. 165 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:29:14,383 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:29:14,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802308306] [2021-06-12 19:29:14,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802308306] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:29:14,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732655608] [2021-06-12 19:29:14,383 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 [2021-06-12 19:29:14,417 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-06-12 19:29:14,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:29:14,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:29:14,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:29:14,541 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 62 proven. 165 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:29:14,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [732655608] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:29:14,541 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:29:14,542 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 18 [2021-06-12 19:29:14,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469062905] [2021-06-12 19:29:14,542 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:29:14,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:29:14,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:29:14,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:29:14,542 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) [2021-06-12 19:29:14,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:29:14,882 INFO L93 Difference]: Finished difference Result 26526 states and 65340 transitions. [2021-06-12 19:29:14,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 19:29:14,882 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 [2021-06-12 19:29:14,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:29:14,916 INFO L225 Difference]: With dead ends: 26526 [2021-06-12 19:29:14,916 INFO L226 Difference]: Without dead ends: 26502 [2021-06-12 19:29:14,916 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 129.8ms TimeCoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:29:14,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26502 states. [2021-06-12 19:29:15,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26502 to 21675. [2021-06-12 19:29:15,285 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) [2021-06-12 19:29:15,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21675 states to 21675 states and 56839 transitions. [2021-06-12 19:29:15,323 INFO L78 Accepts]: Start accepts. Automaton has 21675 states and 56839 transitions. Word has length 65 [2021-06-12 19:29:15,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:29:15,323 INFO L482 AbstractCegarLoop]: Abstraction has 21675 states and 56839 transitions. [2021-06-12 19:29:15,323 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) [2021-06-12 19:29:15,323 INFO L276 IsEmpty]: Start isEmpty. Operand 21675 states and 56839 transitions. [2021-06-12 19:29:15,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-12 19:29:15,338 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:29:15,338 INFO L472 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:29:15,538 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1303,610 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:29:15,539 INFO L430 AbstractCegarLoop]: === Iteration 619 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:29:15,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:29:15,539 INFO L82 PathProgramCache]: Analyzing trace with hash -1860422686, now seen corresponding path program 378 times [2021-06-12 19:29:15,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:29:15,539 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757443304] [2021-06-12 19:29:15,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:29:15,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:29:15,654 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 19 proven. 204 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:29:15,654 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:29:15,654 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757443304] [2021-06-12 19:29:15,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757443304] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:29:15,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725508109] [2021-06-12 19:29:15,655 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 [2021-06-12 19:29:15,690 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-06-12 19:29:15,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:29:15,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-12 19:29:15,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:29:15,782 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 18 proven. 205 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:29:15,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1725508109] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:29:15,782 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:29:15,782 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-12 19:29:15,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991858217] [2021-06-12 19:29:15,782 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:29:15,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:29:15,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:29:15,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:29:15,783 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) [2021-06-12 19:29:16,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:29:16,960 INFO L93 Difference]: Finished difference Result 30486 states and 75594 transitions. [2021-06-12 19:29:16,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-12 19:29:16,960 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 [2021-06-12 19:29:16,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:29:16,997 INFO L225 Difference]: With dead ends: 30486 [2021-06-12 19:29:16,997 INFO L226 Difference]: Without dead ends: 30306 [2021-06-12 19:29:16,998 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 69 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 527 ImplicationChecksByTransitivity, 448.7ms TimeCoverageRelationStatistics Valid=237, Invalid=1925, Unknown=0, NotChecked=0, Total=2162 [2021-06-12 19:29:17,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30306 states. [2021-06-12 19:29:17,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30306 to 22166. [2021-06-12 19:29:17,345 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) [2021-06-12 19:29:17,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22166 states to 22166 states and 58118 transitions. [2021-06-12 19:29:17,386 INFO L78 Accepts]: Start accepts. Automaton has 22166 states and 58118 transitions. Word has length 65 [2021-06-12 19:29:17,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:29:17,386 INFO L482 AbstractCegarLoop]: Abstraction has 22166 states and 58118 transitions. [2021-06-12 19:29:17,386 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) [2021-06-12 19:29:17,386 INFO L276 IsEmpty]: Start isEmpty. Operand 22166 states and 58118 transitions. [2021-06-12 19:29:17,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-12 19:29:17,402 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:29:17,402 INFO L472 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:29:17,602 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1307,611 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:29:17,603 INFO L430 AbstractCegarLoop]: === Iteration 620 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:29:17,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:29:17,603 INFO L82 PathProgramCache]: Analyzing trace with hash -1473820009, now seen corresponding path program 379 times [2021-06-12 19:29:17,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:29:17,603 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241539677] [2021-06-12 19:29:17,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:29:17,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:29:17,696 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 59 proven. 167 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:29:17,697 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:29:17,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241539677] [2021-06-12 19:29:17,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241539677] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:29:17,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349296296] [2021-06-12 19:29:17,697 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 [2021-06-12 19:29:17,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:29:17,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:29:17,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:29:17,901 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2021-06-12 19:29:17,937 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 59 proven. 167 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:29:17,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [349296296] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:29:17,938 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:29:17,938 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-06-12 19:29:17,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015559406] [2021-06-12 19:29:17,938 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:29:17,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:29:17,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:29:17,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:29:17,938 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) [2021-06-12 19:29:18,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:29:18,217 INFO L93 Difference]: Finished difference Result 26943 states and 66422 transitions. [2021-06-12 19:29:18,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:29:18,218 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 [2021-06-12 19:29:18,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:29:18,248 INFO L225 Difference]: With dead ends: 26943 [2021-06-12 19:29:18,248 INFO L226 Difference]: Without dead ends: 26910 [2021-06-12 19:29:18,249 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 112.3ms TimeCoverageRelationStatistics Valid=110, Invalid=232, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:29:18,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26910 states. [2021-06-12 19:29:18,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26910 to 22166. [2021-06-12 19:29:18,557 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) [2021-06-12 19:29:18,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22166 states to 22166 states and 58109 transitions. [2021-06-12 19:29:18,595 INFO L78 Accepts]: Start accepts. Automaton has 22166 states and 58109 transitions. Word has length 65 [2021-06-12 19:29:18,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:29:18,596 INFO L482 AbstractCegarLoop]: Abstraction has 22166 states and 58109 transitions. [2021-06-12 19:29:18,596 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) [2021-06-12 19:29:18,596 INFO L276 IsEmpty]: Start isEmpty. Operand 22166 states and 58109 transitions. [2021-06-12 19:29:18,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-12 19:29:18,612 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:29:18,612 INFO L472 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:29:18,812 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 612 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1308 [2021-06-12 19:29:18,812 INFO L430 AbstractCegarLoop]: === Iteration 621 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:29:18,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:29:18,812 INFO L82 PathProgramCache]: Analyzing trace with hash -1920114196, now seen corresponding path program 380 times [2021-06-12 19:29:18,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:29:18,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604186244] [2021-06-12 19:29:18,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:29:18,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:29:18,943 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 19 proven. 204 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:29:18,943 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:29:18,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604186244] [2021-06-12 19:29:18,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604186244] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:29:18,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135000056] [2021-06-12 19:29:18,943 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 [2021-06-12 19:29:18,973 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:29:18,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:29:18,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-12 19:29:18,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:29:19,067 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 18 proven. 205 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:29:19,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135000056] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:29:19,068 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:29:19,068 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-12 19:29:19,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949141783] [2021-06-12 19:29:19,068 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:29:19,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:29:19,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:29:19,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:29:19,068 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) [2021-06-12 19:29:20,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:29:20,728 INFO L93 Difference]: Finished difference Result 36934 states and 90171 transitions. [2021-06-12 19:29:20,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-06-12 19:29:20,728 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 [2021-06-12 19:29:20,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:29:20,773 INFO L225 Difference]: With dead ends: 36934 [2021-06-12 19:29:20,773 INFO L226 Difference]: Without dead ends: 36658 [2021-06-12 19:29:20,773 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 68 SyntacticMatches, 2 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1534 ImplicationChecksByTransitivity, 788.4ms TimeCoverageRelationStatistics Valid=507, Invalid=4463, Unknown=0, NotChecked=0, Total=4970 [2021-06-12 19:29:20,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36658 states. [2021-06-12 19:29:21,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36658 to 22558. [2021-06-12 19:29:21,141 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) [2021-06-12 19:29:21,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22558 states to 22558 states and 59133 transitions. [2021-06-12 19:29:21,180 INFO L78 Accepts]: Start accepts. Automaton has 22558 states and 59133 transitions. Word has length 65 [2021-06-12 19:29:21,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:29:21,181 INFO L482 AbstractCegarLoop]: Abstraction has 22558 states and 59133 transitions. [2021-06-12 19:29:21,181 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) [2021-06-12 19:29:21,181 INFO L276 IsEmpty]: Start isEmpty. Operand 22558 states and 59133 transitions. [2021-06-12 19:29:21,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-12 19:29:21,197 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:29:21,197 INFO L472 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:29:21,397 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 613 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1313 [2021-06-12 19:29:21,398 INFO L430 AbstractCegarLoop]: === Iteration 622 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:29:21,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:29:21,398 INFO L82 PathProgramCache]: Analyzing trace with hash -26541327, now seen corresponding path program 381 times [2021-06-12 19:29:21,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:29:21,398 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498256540] [2021-06-12 19:29:21,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:29:21,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:29:21,504 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 63 proven. 163 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:29:21,505 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:29:21,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498256540] [2021-06-12 19:29:21,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498256540] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:29:21,505 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255178761] [2021-06-12 19:29:21,505 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 [2021-06-12 19:29:21,539 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-06-12 19:29:21,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:29:21,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:29:21,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:29:21,637 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 63 proven. 163 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:29:21,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1255178761] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:29:21,637 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:29:21,637 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-06-12 19:29:21,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772288998] [2021-06-12 19:29:21,637 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:29:21,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:29:21,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:29:21,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:29:21,637 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) [2021-06-12 19:29:21,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:29:21,951 INFO L93 Difference]: Finished difference Result 27397 states and 67556 transitions. [2021-06-12 19:29:21,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 19:29:21,952 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 [2021-06-12 19:29:21,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:29:21,985 INFO L225 Difference]: With dead ends: 27397 [2021-06-12 19:29:21,986 INFO L226 Difference]: Without dead ends: 27355 [2021-06-12 19:29:21,986 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 134.4ms TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:29:22,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27355 states. [2021-06-12 19:29:22,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27355 to 22069. [2021-06-12 19:29:22,314 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) [2021-06-12 19:29:22,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22069 states to 22069 states and 57743 transitions. [2021-06-12 19:29:22,354 INFO L78 Accepts]: Start accepts. Automaton has 22069 states and 57743 transitions. Word has length 65 [2021-06-12 19:29:22,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:29:22,354 INFO L482 AbstractCegarLoop]: Abstraction has 22069 states and 57743 transitions. [2021-06-12 19:29:22,354 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) [2021-06-12 19:29:22,354 INFO L276 IsEmpty]: Start isEmpty. Operand 22069 states and 57743 transitions. [2021-06-12 19:29:22,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-12 19:29:22,370 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:29:22,370 INFO L472 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:29:22,570 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1314,614 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:29:22,570 INFO L430 AbstractCegarLoop]: === Iteration 623 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:29:22,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:29:22,571 INFO L82 PathProgramCache]: Analyzing trace with hash -2073428062, now seen corresponding path program 382 times [2021-06-12 19:29:22,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:29:22,571 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343251984] [2021-06-12 19:29:22,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:29:22,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:29:22,820 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 18 proven. 207 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:29:22,820 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:29:22,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343251984] [2021-06-12 19:29:22,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343251984] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:29:22,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298137418] [2021-06-12 19:29:22,820 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 [2021-06-12 19:29:22,850 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:29:22,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:29:22,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-12 19:29:22,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:29:22,944 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 18 proven. 207 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:29:22,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [298137418] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:29:22,944 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:29:22,945 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-06-12 19:29:22,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640356082] [2021-06-12 19:29:22,945 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:29:22,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:29:22,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:29:22,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:29:22,945 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) [2021-06-12 19:29:23,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:29:23,987 INFO L93 Difference]: Finished difference Result 30333 states and 75005 transitions. [2021-06-12 19:29:23,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 19:29:23,987 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 [2021-06-12 19:29:23,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:29:24,032 INFO L225 Difference]: With dead ends: 30333 [2021-06-12 19:29:24,033 INFO L226 Difference]: Without dead ends: 29955 [2021-06-12 19:29:24,033 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 67 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 448.8ms TimeCoverageRelationStatistics Valid=150, Invalid=972, Unknown=0, NotChecked=0, Total=1122 [2021-06-12 19:29:24,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29955 states. [2021-06-12 19:29:24,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29955 to 20830. [2021-06-12 19:29:24,342 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) [2021-06-12 19:29:24,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20830 states to 20830 states and 54418 transitions. [2021-06-12 19:29:24,374 INFO L78 Accepts]: Start accepts. Automaton has 20830 states and 54418 transitions. Word has length 65 [2021-06-12 19:29:24,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:29:24,374 INFO L482 AbstractCegarLoop]: Abstraction has 20830 states and 54418 transitions. [2021-06-12 19:29:24,374 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) [2021-06-12 19:29:24,374 INFO L276 IsEmpty]: Start isEmpty. Operand 20830 states and 54418 transitions. [2021-06-12 19:29:24,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-12 19:29:24,387 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:29:24,387 INFO L472 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:29:24,588 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 615 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1320 [2021-06-12 19:29:24,588 INFO L430 AbstractCegarLoop]: === Iteration 624 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:29:24,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:29:24,588 INFO L82 PathProgramCache]: Analyzing trace with hash 1983477717, now seen corresponding path program 183 times [2021-06-12 19:29:24,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:29:24,588 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579213707] [2021-06-12 19:29:24,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:29:24,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:29:24,663 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 174 proven. 53 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:29:24,664 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:29:24,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579213707] [2021-06-12 19:29:24,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579213707] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:29:24,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399270143] [2021-06-12 19:29:24,664 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 [2021-06-12 19:29:24,700 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-06-12 19:29:24,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:29:24,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:29:24,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:29:24,796 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 175 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:29:24,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [399270143] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:29:24,797 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:29:24,797 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 13 [2021-06-12 19:29:24,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424708891] [2021-06-12 19:29:24,797 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:29:24,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:29:24,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:29:24,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=106, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:29:24,797 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) [2021-06-12 19:29:25,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:29:25,079 INFO L93 Difference]: Finished difference Result 26854 states and 66816 transitions. [2021-06-12 19:29:25,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:29:25,080 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 [2021-06-12 19:29:25,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:29:25,116 INFO L225 Difference]: With dead ends: 26854 [2021-06-12 19:29:25,116 INFO L226 Difference]: Without dead ends: 26832 [2021-06-12 19:29:25,117 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 81.2ms TimeCoverageRelationStatistics Valid=98, Invalid=142, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:29:25,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26832 states. [2021-06-12 19:29:25,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26832 to 21370. [2021-06-12 19:29:25,480 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) [2021-06-12 19:29:25,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21370 states to 21370 states and 55910 transitions. [2021-06-12 19:29:25,515 INFO L78 Accepts]: Start accepts. Automaton has 21370 states and 55910 transitions. Word has length 65 [2021-06-12 19:29:25,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:29:25,515 INFO L482 AbstractCegarLoop]: Abstraction has 21370 states and 55910 transitions. [2021-06-12 19:29:25,516 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) [2021-06-12 19:29:25,516 INFO L276 IsEmpty]: Start isEmpty. Operand 21370 states and 55910 transitions. [2021-06-12 19:29:25,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-12 19:29:25,531 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:29:25,531 INFO L472 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:29:25,731 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 616 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1321 [2021-06-12 19:29:25,731 INFO L430 AbstractCegarLoop]: === Iteration 625 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:29:25,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:29:25,731 INFO L82 PathProgramCache]: Analyzing trace with hash 1361597307, now seen corresponding path program 184 times [2021-06-12 19:29:25,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:29:25,731 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473547068] [2021-06-12 19:29:25,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:29:25,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:29:25,805 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 174 proven. 52 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:29:25,805 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:29:25,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473547068] [2021-06-12 19:29:25,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473547068] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:29:25,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598540313] [2021-06-12 19:29:25,806 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 [2021-06-12 19:29:25,835 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:29:25,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:29:25,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:29:25,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:29:25,936 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 175 proven. 52 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:29:25,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1598540313] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:29:25,936 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:29:25,936 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 13 [2021-06-12 19:29:25,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470573619] [2021-06-12 19:29:25,936 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:29:25,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:29:25,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:29:25,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=106, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:29:25,937 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) [2021-06-12 19:29:26,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:29:26,286 INFO L93 Difference]: Finished difference Result 33593 states and 82285 transitions. [2021-06-12 19:29:26,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 19:29:26,286 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 [2021-06-12 19:29:26,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:29:26,334 INFO L225 Difference]: With dead ends: 33593 [2021-06-12 19:29:26,334 INFO L226 Difference]: Without dead ends: 33593 [2021-06-12 19:29:26,334 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 108.5ms TimeCoverageRelationStatistics Valid=146, Invalid=196, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:29:26,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33593 states. [2021-06-12 19:29:26,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33593 to 21389. [2021-06-12 19:29:26,692 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) [2021-06-12 19:29:26,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21389 states to 21389 states and 55967 transitions. [2021-06-12 19:29:26,727 INFO L78 Accepts]: Start accepts. Automaton has 21389 states and 55967 transitions. Word has length 65 [2021-06-12 19:29:26,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:29:26,727 INFO L482 AbstractCegarLoop]: Abstraction has 21389 states and 55967 transitions. [2021-06-12 19:29:26,727 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) [2021-06-12 19:29:26,727 INFO L276 IsEmpty]: Start isEmpty. Operand 21389 states and 55967 transitions. [2021-06-12 19:29:26,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-12 19:29:26,741 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:29:26,741 INFO L472 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:29:26,941 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 617 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1323 [2021-06-12 19:29:26,941 INFO L430 AbstractCegarLoop]: === Iteration 626 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:29:26,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:29:26,942 INFO L82 PathProgramCache]: Analyzing trace with hash -275975149, now seen corresponding path program 185 times [2021-06-12 19:29:26,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:29:26,942 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119237951] [2021-06-12 19:29:26,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:29:26,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:29:27,025 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 171 proven. 55 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:29:27,025 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:29:27,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119237951] [2021-06-12 19:29:27,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119237951] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:29:27,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720351362] [2021-06-12 19:29:27,025 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 [2021-06-12 19:29:27,063 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-06-12 19:29:27,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:29:27,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:29:27,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:29:27,267 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 173 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:29:27,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [720351362] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:29:27,267 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:29:27,267 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 21] total 24 [2021-06-12 19:29:27,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626666283] [2021-06-12 19:29:27,267 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 19:29:27,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:29:27,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 19:29:27,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=394, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:29:27,267 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) [2021-06-12 19:29:28,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:29:28,047 INFO L93 Difference]: Finished difference Result 38717 states and 94084 transitions. [2021-06-12 19:29:28,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 19:29:28,048 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 [2021-06-12 19:29:28,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:29:28,097 INFO L225 Difference]: With dead ends: 38717 [2021-06-12 19:29:28,097 INFO L226 Difference]: Without dead ends: 38717 [2021-06-12 19:29:28,097 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 393 ImplicationChecksByTransitivity, 461.1ms TimeCoverageRelationStatistics Valid=617, Invalid=1023, Unknown=0, NotChecked=0, Total=1640 [2021-06-12 19:29:28,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38717 states. [2021-06-12 19:29:28,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38717 to 21452. [2021-06-12 19:29:28,485 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) [2021-06-12 19:29:28,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21452 states to 21452 states and 56172 transitions. [2021-06-12 19:29:28,524 INFO L78 Accepts]: Start accepts. Automaton has 21452 states and 56172 transitions. Word has length 65 [2021-06-12 19:29:28,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:29:28,525 INFO L482 AbstractCegarLoop]: Abstraction has 21452 states and 56172 transitions. [2021-06-12 19:29:28,525 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) [2021-06-12 19:29:28,525 INFO L276 IsEmpty]: Start isEmpty. Operand 21452 states and 56172 transitions. [2021-06-12 19:29:28,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-12 19:29:28,541 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:29:28,541 INFO L472 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:29:28,742 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1324,618 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:29:28,742 INFO L430 AbstractCegarLoop]: === Iteration 627 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:29:28,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:29:28,742 INFO L82 PathProgramCache]: Analyzing trace with hash -1965970313, now seen corresponding path program 186 times [2021-06-12 19:29:28,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:29:28,742 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128412891] [2021-06-12 19:29:28,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:29:28,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:29:28,840 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 158 proven. 68 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:29:28,840 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:29:28,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128412891] [2021-06-12 19:29:28,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128412891] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:29:28,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320312565] [2021-06-12 19:29:28,840 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 [2021-06-12 19:29:28,877 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-06-12 19:29:28,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:29:28,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:29:28,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:29:28,981 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 159 proven. 68 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:29:28,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [320312565] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:29:28,982 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:29:28,982 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 15 [2021-06-12 19:29:28,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589572142] [2021-06-12 19:29:28,982 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:29:28,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:29:28,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:29:28,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:29:28,982 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) [2021-06-12 19:29:29,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:29:29,494 INFO L93 Difference]: Finished difference Result 36438 states and 88848 transitions. [2021-06-12 19:29:29,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 19:29:29,494 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 [2021-06-12 19:29:29,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:29:29,546 INFO L225 Difference]: With dead ends: 36438 [2021-06-12 19:29:29,546 INFO L226 Difference]: Without dead ends: 36438 [2021-06-12 19:29:29,546 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 188.4ms TimeCoverageRelationStatistics Valid=276, Invalid=426, Unknown=0, NotChecked=0, Total=702 [2021-06-12 19:29:29,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36438 states. [2021-06-12 19:29:29,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36438 to 21482. [2021-06-12 19:29:30,012 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) [2021-06-12 19:29:30,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21482 states to 21482 states and 56260 transitions. [2021-06-12 19:29:30,049 INFO L78 Accepts]: Start accepts. Automaton has 21482 states and 56260 transitions. Word has length 65 [2021-06-12 19:29:30,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:29:30,049 INFO L482 AbstractCegarLoop]: Abstraction has 21482 states and 56260 transitions. [2021-06-12 19:29:30,049 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) [2021-06-12 19:29:30,049 INFO L276 IsEmpty]: Start isEmpty. Operand 21482 states and 56260 transitions. [2021-06-12 19:29:30,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-12 19:29:30,066 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:29:30,066 INFO L472 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:29:30,266 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 619 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1325 [2021-06-12 19:29:30,267 INFO L430 AbstractCegarLoop]: === Iteration 628 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:29:30,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:29:30,267 INFO L82 PathProgramCache]: Analyzing trace with hash 1289709971, now seen corresponding path program 187 times [2021-06-12 19:29:30,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:29:30,267 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023722905] [2021-06-12 19:29:30,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:29:30,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:29:30,374 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 145 proven. 81 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:29:30,375 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:29:30,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023722905] [2021-06-12 19:29:30,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023722905] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:29:30,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650324166] [2021-06-12 19:29:30,375 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 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 [2021-06-12 19:29:30,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:29:30,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:29:30,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:29:30,507 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 146 proven. 81 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:29:30,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [650324166] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:29:30,508 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:29:30,508 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 16 [2021-06-12 19:29:30,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107868396] [2021-06-12 19:29:30,508 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:29:30,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:29:30,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:29:30,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:29:30,508 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) [2021-06-12 19:29:30,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:29:30,992 INFO L93 Difference]: Finished difference Result 32841 states and 80457 transitions. [2021-06-12 19:29:30,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 19:29:30,992 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 [2021-06-12 19:29:30,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:29:31,038 INFO L225 Difference]: With dead ends: 32841 [2021-06-12 19:29:31,038 INFO L226 Difference]: Without dead ends: 32841 [2021-06-12 19:29:31,038 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 201.4ms TimeCoverageRelationStatistics Valid=290, Invalid=466, Unknown=0, NotChecked=0, Total=756 [2021-06-12 19:29:31,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32841 states. [2021-06-12 19:29:31,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32841 to 21485. [2021-06-12 19:29:31,401 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) [2021-06-12 19:29:31,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21485 states to 21485 states and 56255 transitions. [2021-06-12 19:29:31,438 INFO L78 Accepts]: Start accepts. Automaton has 21485 states and 56255 transitions. Word has length 65 [2021-06-12 19:29:31,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:29:31,438 INFO L482 AbstractCegarLoop]: Abstraction has 21485 states and 56255 transitions. [2021-06-12 19:29:31,438 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) [2021-06-12 19:29:31,438 INFO L276 IsEmpty]: Start isEmpty. Operand 21485 states and 56255 transitions. [2021-06-12 19:29:31,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-12 19:29:31,455 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:29:31,455 INFO L472 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:29:31,655 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1326,620 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:29:31,655 INFO L430 AbstractCegarLoop]: === Iteration 629 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:29:31,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:29:31,655 INFO L82 PathProgramCache]: Analyzing trace with hash -1985394953, now seen corresponding path program 188 times [2021-06-12 19:29:31,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:29:31,655 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090244230] [2021-06-12 19:29:31,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:29:31,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:29:31,777 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 132 proven. 95 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:29:31,777 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:29:31,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090244230] [2021-06-12 19:29:31,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090244230] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:29:31,777 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289718884] [2021-06-12 19:29:31,777 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 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 [2021-06-12 19:29:31,849 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:29:31,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:29:31,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:29:31,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:29:31,956 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 133 proven. 95 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:29:31,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1289718884] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:29:31,956 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:29:31,956 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 17 [2021-06-12 19:29:31,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658452161] [2021-06-12 19:29:31,957 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:29:31,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:29:31,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:29:31,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=212, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:29:31,957 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) [2021-06-12 19:29:32,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:29:32,413 INFO L93 Difference]: Finished difference Result 27627 states and 68779 transitions. [2021-06-12 19:29:32,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 19:29:32,413 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 [2021-06-12 19:29:32,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:29:32,453 INFO L225 Difference]: With dead ends: 27627 [2021-06-12 19:29:32,453 INFO L226 Difference]: Without dead ends: 27627 [2021-06-12 19:29:32,453 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 205.2ms TimeCoverageRelationStatistics Valid=256, Invalid=446, Unknown=0, NotChecked=0, Total=702 [2021-06-12 19:29:32,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27627 states. [2021-06-12 19:29:32,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27627 to 20986. [2021-06-12 19:29:32,794 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) [2021-06-12 19:29:32,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20986 states to 20986 states and 54857 transitions. [2021-06-12 19:29:32,827 INFO L78 Accepts]: Start accepts. Automaton has 20986 states and 54857 transitions. Word has length 65 [2021-06-12 19:29:32,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:29:32,827 INFO L482 AbstractCegarLoop]: Abstraction has 20986 states and 54857 transitions. [2021-06-12 19:29:32,827 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) [2021-06-12 19:29:32,827 INFO L276 IsEmpty]: Start isEmpty. Operand 20986 states and 54857 transitions. [2021-06-12 19:29:32,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-12 19:29:32,842 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:29:32,842 INFO L472 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:29:33,042 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1327,621 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:29:33,042 INFO L430 AbstractCegarLoop]: === Iteration 630 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:29:33,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:29:33,043 INFO L82 PathProgramCache]: Analyzing trace with hash -1324010409, now seen corresponding path program 383 times [2021-06-12 19:29:33,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:29:33,043 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602241063] [2021-06-12 19:29:33,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:29:33,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:29:33,185 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 74 proven. 153 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:29:33,186 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:29:33,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602241063] [2021-06-12 19:29:33,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602241063] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:29:33,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064993992] [2021-06-12 19:29:33,186 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 [2021-06-12 19:29:33,218 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-06-12 19:29:33,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:29:33,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:29:33,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:29:33,355 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 75 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:29:33,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2064993992] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:29:33,355 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:29:33,355 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18] total 21 [2021-06-12 19:29:33,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461417348] [2021-06-12 19:29:33,355 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 19:29:33,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:29:33,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 19:29:33,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=345, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:29:33,356 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) [2021-06-12 19:29:33,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:29:33,806 INFO L93 Difference]: Finished difference Result 25486 states and 62722 transitions. [2021-06-12 19:29:33,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-12 19:29:33,806 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 [2021-06-12 19:29:33,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:29:33,837 INFO L225 Difference]: With dead ends: 25486 [2021-06-12 19:29:33,837 INFO L226 Difference]: Without dead ends: 25441 [2021-06-12 19:29:33,838 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 222.3ms TimeCoverageRelationStatistics Valid=188, Invalid=568, Unknown=0, NotChecked=0, Total=756 [2021-06-12 19:29:33,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25441 states. [2021-06-12 19:29:34,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25441 to 20986. [2021-06-12 19:29:34,125 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) [2021-06-12 19:29:34,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20986 states to 20986 states and 54848 transitions. [2021-06-12 19:29:34,159 INFO L78 Accepts]: Start accepts. Automaton has 20986 states and 54848 transitions. Word has length 65 [2021-06-12 19:29:34,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:29:34,159 INFO L482 AbstractCegarLoop]: Abstraction has 20986 states and 54848 transitions. [2021-06-12 19:29:34,159 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) [2021-06-12 19:29:34,159 INFO L276 IsEmpty]: Start isEmpty. Operand 20986 states and 54848 transitions. [2021-06-12 19:29:34,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-12 19:29:34,174 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:29:34,174 INFO L472 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:29:34,374 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1328,622 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:29:34,374 INFO L430 AbstractCegarLoop]: === Iteration 631 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:29:34,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:29:34,375 INFO L82 PathProgramCache]: Analyzing trace with hash 626281894, now seen corresponding path program 189 times [2021-06-12 19:29:34,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:29:34,375 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940083716] [2021-06-12 19:29:34,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:29:34,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:29:34,480 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 10 proven. 213 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:29:34,480 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:29:34,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940083716] [2021-06-12 19:29:34,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940083716] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:29:34,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067453389] [2021-06-12 19:29:34,480 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 [2021-06-12 19:29:34,518 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2021-06-12 19:29:34,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:29:34,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-12 19:29:34,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:29:34,611 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 9 proven. 214 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:29:34,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1067453389] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:29:34,611 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:29:34,611 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-12 19:29:34,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755244825] [2021-06-12 19:29:34,611 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:29:34,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:29:34,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:29:34,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:29:34,612 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) [2021-06-12 19:29:35,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:29:35,346 INFO L93 Difference]: Finished difference Result 23249 states and 59286 transitions. [2021-06-12 19:29:35,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 19:29:35,346 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 [2021-06-12 19:29:35,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:29:35,374 INFO L225 Difference]: With dead ends: 23249 [2021-06-12 19:29:35,375 INFO L226 Difference]: Without dead ends: 23218 [2021-06-12 19:29:35,375 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 70 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 171.4ms TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:29:35,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23218 states. [2021-06-12 19:29:35,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23218 to 21247. [2021-06-12 19:29:35,641 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) [2021-06-12 19:29:35,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21247 states to 21247 states and 55486 transitions. [2021-06-12 19:29:35,676 INFO L78 Accepts]: Start accepts. Automaton has 21247 states and 55486 transitions. Word has length 65 [2021-06-12 19:29:35,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:29:35,676 INFO L482 AbstractCegarLoop]: Abstraction has 21247 states and 55486 transitions. [2021-06-12 19:29:35,676 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) [2021-06-12 19:29:35,677 INFO L276 IsEmpty]: Start isEmpty. Operand 21247 states and 55486 transitions. [2021-06-12 19:29:35,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-12 19:29:35,692 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:29:35,692 INFO L472 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:29:35,892 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 623 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1335 [2021-06-12 19:29:35,892 INFO L430 AbstractCegarLoop]: === Iteration 632 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:29:35,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:29:35,892 INFO L82 PathProgramCache]: Analyzing trace with hash -927414963, now seen corresponding path program 384 times [2021-06-12 19:29:35,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:29:35,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148030180] [2021-06-12 19:29:35,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:29:35,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:29:35,959 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 77 proven. 146 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-12 19:29:35,960 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:29:35,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148030180] [2021-06-12 19:29:35,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148030180] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:29:35,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306876734] [2021-06-12 19:29:35,960 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 [2021-06-12 19:29:35,995 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-06-12 19:29:35,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:29:35,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:29:35,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:29:36,088 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 77 proven. 146 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-12 19:29:36,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1306876734] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:29:36,088 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:29:36,088 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-12 19:29:36,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975900656] [2021-06-12 19:29:36,088 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-12 19:29:36,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:29:36,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-12 19:29:36,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-06-12 19:29:36,088 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) [2021-06-12 19:29:36,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:29:36,306 INFO L93 Difference]: Finished difference Result 26072 states and 63936 transitions. [2021-06-12 19:29:36,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-12 19:29:36,306 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 [2021-06-12 19:29:36,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:29:36,342 INFO L225 Difference]: With dead ends: 26072 [2021-06-12 19:29:36,343 INFO L226 Difference]: Without dead ends: 26069 [2021-06-12 19:29:36,343 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 60.2ms TimeCoverageRelationStatistics Valid=67, Invalid=89, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:29:36,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26069 states. [2021-06-12 19:29:36,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26069 to 21233. [2021-06-12 19:29:36,660 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) [2021-06-12 19:29:36,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21233 states to 21233 states and 55429 transitions. [2021-06-12 19:29:36,694 INFO L78 Accepts]: Start accepts. Automaton has 21233 states and 55429 transitions. Word has length 65 [2021-06-12 19:29:36,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:29:36,694 INFO L482 AbstractCegarLoop]: Abstraction has 21233 states and 55429 transitions. [2021-06-12 19:29:36,694 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) [2021-06-12 19:29:36,695 INFO L276 IsEmpty]: Start isEmpty. Operand 21233 states and 55429 transitions. [2021-06-12 19:29:36,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-12 19:29:36,709 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:29:36,710 INFO L472 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:29:36,910 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 624 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1336 [2021-06-12 19:29:36,910 INFO L430 AbstractCegarLoop]: === Iteration 633 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:29:36,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:29:36,910 INFO L82 PathProgramCache]: Analyzing trace with hash -720352397, now seen corresponding path program 385 times [2021-06-12 19:29:36,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:29:36,910 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243532554] [2021-06-12 19:29:36,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:29:36,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:29:36,985 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 70 proven. 153 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-12 19:29:36,985 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:29:36,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243532554] [2021-06-12 19:29:36,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243532554] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:29:36,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789004009] [2021-06-12 19:29:36,985 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 [2021-06-12 19:29:37,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:29:37,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:29:37,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:29:37,105 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 70 proven. 153 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-12 19:29:37,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1789004009] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:29:37,105 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:29:37,105 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-06-12 19:29:37,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419550258] [2021-06-12 19:29:37,106 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:29:37,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:29:37,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:29:37,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:29:37,106 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) [2021-06-12 19:29:37,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:29:37,455 INFO L93 Difference]: Finished difference Result 26094 states and 63928 transitions. [2021-06-12 19:29:37,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:29:37,455 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 [2021-06-12 19:29:37,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:29:37,487 INFO L225 Difference]: With dead ends: 26094 [2021-06-12 19:29:37,488 INFO L226 Difference]: Without dead ends: 26076 [2021-06-12 19:29:37,488 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 84.1ms TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:29:37,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26076 states. [2021-06-12 19:29:37,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26076 to 21233. [2021-06-12 19:29:37,793 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) [2021-06-12 19:29:37,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21233 states to 21233 states and 55403 transitions. [2021-06-12 19:29:37,833 INFO L78 Accepts]: Start accepts. Automaton has 21233 states and 55403 transitions. Word has length 65 [2021-06-12 19:29:37,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:29:37,834 INFO L482 AbstractCegarLoop]: Abstraction has 21233 states and 55403 transitions. [2021-06-12 19:29:37,834 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) [2021-06-12 19:29:37,834 INFO L276 IsEmpty]: Start isEmpty. Operand 21233 states and 55403 transitions. [2021-06-12 19:29:37,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-12 19:29:37,852 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:29:37,852 INFO L472 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:29:38,052 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1338,625 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:29:38,052 INFO L430 AbstractCegarLoop]: === Iteration 634 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:29:38,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:29:38,052 INFO L82 PathProgramCache]: Analyzing trace with hash 2126614886, now seen corresponding path program 386 times [2021-06-12 19:29:38,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:29:38,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994125901] [2021-06-12 19:29:38,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:29:38,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:29:38,151 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 22 proven. 201 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:29:38,151 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:29:38,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994125901] [2021-06-12 19:29:38,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994125901] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:29:38,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954404212] [2021-06-12 19:29:38,151 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 [2021-06-12 19:29:38,181 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:29:38,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:29:38,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-12 19:29:38,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:29:38,287 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 17 proven. 206 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:29:38,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [954404212] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:29:38,288 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:29:38,288 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-12 19:29:38,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421233083] [2021-06-12 19:29:38,288 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:29:38,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:29:38,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:29:38,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:29:38,288 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) [2021-06-12 19:29:39,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:29:39,253 INFO L93 Difference]: Finished difference Result 22551 states and 57719 transitions. [2021-06-12 19:29:39,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 19:29:39,253 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 [2021-06-12 19:29:39,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:29:39,278 INFO L225 Difference]: With dead ends: 22551 [2021-06-12 19:29:39,278 INFO L226 Difference]: Without dead ends: 22441 [2021-06-12 19:29:39,278 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 70 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 176.9ms TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:29:39,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22441 states. [2021-06-12 19:29:39,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22441 to 21246. [2021-06-12 19:29:39,538 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) [2021-06-12 19:29:39,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21246 states to 21246 states and 55339 transitions. [2021-06-12 19:29:39,575 INFO L78 Accepts]: Start accepts. Automaton has 21246 states and 55339 transitions. Word has length 65 [2021-06-12 19:29:39,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:29:39,575 INFO L482 AbstractCegarLoop]: Abstraction has 21246 states and 55339 transitions. [2021-06-12 19:29:39,575 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) [2021-06-12 19:29:39,575 INFO L276 IsEmpty]: Start isEmpty. Operand 21246 states and 55339 transitions. [2021-06-12 19:29:39,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-12 19:29:39,591 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:29:39,591 INFO L472 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:29:39,791 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 626 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1341 [2021-06-12 19:29:39,792 INFO L430 AbstractCegarLoop]: === Iteration 635 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:29:39,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:29:39,792 INFO L82 PathProgramCache]: Analyzing trace with hash 1513078706, now seen corresponding path program 387 times [2021-06-12 19:29:39,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:29:39,792 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655268898] [2021-06-12 19:29:39,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:29:39,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:29:39,899 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 19 proven. 202 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-12 19:29:39,899 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:29:39,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655268898] [2021-06-12 19:29:39,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655268898] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:29:39,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736579237] [2021-06-12 19:29:39,899 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 [2021-06-12 19:29:39,934 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2021-06-12 19:29:39,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:29:39,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-12 19:29:39,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:29:40,027 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 18 proven. 203 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-12 19:29:40,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [736579237] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:29:40,027 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:29:40,027 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-12 19:29:40,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739868976] [2021-06-12 19:29:40,028 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:29:40,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:29:40,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:29:40,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:29:40,028 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) [2021-06-12 19:29:40,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:29:40,779 INFO L93 Difference]: Finished difference Result 23355 states and 59455 transitions. [2021-06-12 19:29:40,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 19:29:40,779 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 [2021-06-12 19:29:40,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:29:40,807 INFO L225 Difference]: With dead ends: 23355 [2021-06-12 19:29:40,807 INFO L226 Difference]: Without dead ends: 23343 [2021-06-12 19:29:40,807 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 70 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 173.1ms TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:29:40,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23343 states. [2021-06-12 19:29:41,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23343 to 21366. [2021-06-12 19:29:41,081 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) [2021-06-12 19:29:41,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21366 states to 21366 states and 55638 transitions. [2021-06-12 19:29:41,119 INFO L78 Accepts]: Start accepts. Automaton has 21366 states and 55638 transitions. Word has length 65 [2021-06-12 19:29:41,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:29:41,119 INFO L482 AbstractCegarLoop]: Abstraction has 21366 states and 55638 transitions. [2021-06-12 19:29:41,119 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) [2021-06-12 19:29:41,120 INFO L276 IsEmpty]: Start isEmpty. Operand 21366 states and 55638 transitions. [2021-06-12 19:29:41,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-12 19:29:41,135 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:29:41,135 INFO L472 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:29:41,335 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 627 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1342 [2021-06-12 19:29:41,336 INFO L430 AbstractCegarLoop]: === Iteration 636 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:29:41,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:29:41,336 INFO L82 PathProgramCache]: Analyzing trace with hash -639971256, now seen corresponding path program 388 times [2021-06-12 19:29:41,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:29:41,336 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945797156] [2021-06-12 19:29:41,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:29:41,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:29:41,469 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 19 proven. 204 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:29:41,470 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:29:41,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945797156] [2021-06-12 19:29:41,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945797156] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:29:41,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812837546] [2021-06-12 19:29:41,470 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 [2021-06-12 19:29:41,508 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:29:41,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:29:41,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-12 19:29:41,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:29:41,610 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 18 proven. 205 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:29:41,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1812837546] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:29:41,610 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:29:41,610 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-12 19:29:41,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780866774] [2021-06-12 19:29:41,610 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:29:41,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:29:41,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:29:41,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:29:41,611 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) [2021-06-12 19:29:42,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:29:42,539 INFO L93 Difference]: Finished difference Result 25787 states and 64793 transitions. [2021-06-12 19:29:42,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-12 19:29:42,539 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 [2021-06-12 19:29:42,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:29:42,569 INFO L225 Difference]: With dead ends: 25787 [2021-06-12 19:29:42,569 INFO L226 Difference]: Without dead ends: 25733 [2021-06-12 19:29:42,569 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 70 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 308.3ms TimeCoverageRelationStatistics Valid=123, Invalid=933, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 19:29:42,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25733 states. [2021-06-12 19:29:42,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25733 to 21713. [2021-06-12 19:29:42,948 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) [2021-06-12 19:29:42,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21713 states to 21713 states and 56576 transitions. [2021-06-12 19:29:42,985 INFO L78 Accepts]: Start accepts. Automaton has 21713 states and 56576 transitions. Word has length 65 [2021-06-12 19:29:42,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:29:42,985 INFO L482 AbstractCegarLoop]: Abstraction has 21713 states and 56576 transitions. [2021-06-12 19:29:42,985 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) [2021-06-12 19:29:42,985 INFO L276 IsEmpty]: Start isEmpty. Operand 21713 states and 56576 transitions. [2021-06-12 19:29:43,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-12 19:29:43,001 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:29:43,001 INFO L472 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:29:43,201 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 628 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1343 [2021-06-12 19:29:43,201 INFO L430 AbstractCegarLoop]: === Iteration 637 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:29:43,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:29:43,202 INFO L82 PathProgramCache]: Analyzing trace with hash 892587853, now seen corresponding path program 389 times [2021-06-12 19:29:43,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:29:43,202 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811456270] [2021-06-12 19:29:43,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:29:43,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:29:43,287 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 59 proven. 167 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:29:43,287 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:29:43,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811456270] [2021-06-12 19:29:43,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811456270] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:29:43,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321494881] [2021-06-12 19:29:43,287 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 [2021-06-12 19:29:43,320 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2021-06-12 19:29:43,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:29:43,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:29:43,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:29:43,441 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 59 proven. 167 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:29:43,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1321494881] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:29:43,441 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:29:43,441 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 17 [2021-06-12 19:29:43,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097104206] [2021-06-12 19:29:43,441 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:29:43,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:29:43,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:29:43,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:29:43,442 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) [2021-06-12 19:29:43,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:29:43,783 INFO L93 Difference]: Finished difference Result 26779 states and 65477 transitions. [2021-06-12 19:29:43,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 19:29:43,783 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 [2021-06-12 19:29:43,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:29:43,819 INFO L225 Difference]: With dead ends: 26779 [2021-06-12 19:29:43,819 INFO L226 Difference]: Without dead ends: 26755 [2021-06-12 19:29:43,819 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 124.5ms TimeCoverageRelationStatistics Valid=123, Invalid=297, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:29:43,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26755 states. [2021-06-12 19:29:44,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26755 to 21713. [2021-06-12 19:29:44,130 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) [2021-06-12 19:29:44,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21713 states to 21713 states and 56558 transitions. [2021-06-12 19:29:44,168 INFO L78 Accepts]: Start accepts. Automaton has 21713 states and 56558 transitions. Word has length 65 [2021-06-12 19:29:44,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:29:44,168 INFO L482 AbstractCegarLoop]: Abstraction has 21713 states and 56558 transitions. [2021-06-12 19:29:44,169 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) [2021-06-12 19:29:44,169 INFO L276 IsEmpty]: Start isEmpty. Operand 21713 states and 56558 transitions. [2021-06-12 19:29:44,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-12 19:29:44,185 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:29:44,185 INFO L472 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:29:44,385 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1344,629 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:29:44,385 INFO L430 AbstractCegarLoop]: === Iteration 638 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:29:44,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:29:44,386 INFO L82 PathProgramCache]: Analyzing trace with hash -485134722, now seen corresponding path program 390 times [2021-06-12 19:29:44,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:29:44,386 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118994047] [2021-06-12 19:29:44,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:29:44,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:29:44,506 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 19 proven. 204 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:29:44,506 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:29:44,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118994047] [2021-06-12 19:29:44,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118994047] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:29:44,506 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153840049] [2021-06-12 19:29:44,506 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 [2021-06-12 19:29:44,542 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2021-06-12 19:29:44,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:29:44,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-12 19:29:44,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:29:44,638 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 18 proven. 205 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:29:44,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1153840049] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:29:44,638 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:29:44,638 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-12 19:29:44,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792859551] [2021-06-12 19:29:44,638 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:29:44,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:29:44,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:29:44,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:29:44,639 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) [2021-06-12 19:29:46,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:29:46,024 INFO L93 Difference]: Finished difference Result 30965 states and 76348 transitions. [2021-06-12 19:29:46,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-12 19:29:46,025 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 [2021-06-12 19:29:46,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:29:46,061 INFO L225 Difference]: With dead ends: 30965 [2021-06-12 19:29:46,061 INFO L226 Difference]: Without dead ends: 30797 [2021-06-12 19:29:46,062 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 69 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 740 ImplicationChecksByTransitivity, 523.3ms TimeCoverageRelationStatistics Valid=285, Invalid=2471, Unknown=0, NotChecked=0, Total=2756 [2021-06-12 19:29:46,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30797 states. [2021-06-12 19:29:46,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30797 to 22408. [2021-06-12 19:29:46,371 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) [2021-06-12 19:29:46,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22408 states to 22408 states and 58380 transitions. [2021-06-12 19:29:46,411 INFO L78 Accepts]: Start accepts. Automaton has 22408 states and 58380 transitions. Word has length 65 [2021-06-12 19:29:46,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:29:46,411 INFO L482 AbstractCegarLoop]: Abstraction has 22408 states and 58380 transitions. [2021-06-12 19:29:46,411 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.333333333333333) internal successors, (65), 14 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:29:46,411 INFO L276 IsEmpty]: Start isEmpty. Operand 22408 states and 58380 transitions. [2021-06-12 19:29:46,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-12 19:29:46,427 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:29:46,427 INFO L472 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:29:46,627 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1348,630 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:29:46,628 INFO L430 AbstractCegarLoop]: === Iteration 639 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:29:46,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:29:46,628 INFO L82 PathProgramCache]: Analyzing trace with hash -98532045, now seen corresponding path program 391 times [2021-06-12 19:29:46,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:29:46,628 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842270663] [2021-06-12 19:29:46,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:29:46,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:29:46,726 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 54 proven. 172 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:29:46,726 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:29:46,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842270663] [2021-06-12 19:29:46,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842270663] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:29:46,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013329270] [2021-06-12 19:29:46,726 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 [2021-06-12 19:29:46,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:29:46,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:29:46,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:29:46,850 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 54 proven. 172 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:29:46,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1013329270] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:29:46,850 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:29:46,850 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-06-12 19:29:46,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246946514] [2021-06-12 19:29:46,850 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:29:46,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:29:46,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:29:46,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:29:46,850 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) [2021-06-12 19:29:47,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:29:47,155 INFO L93 Difference]: Finished difference Result 27475 states and 67252 transitions. [2021-06-12 19:29:47,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:29:47,155 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 [2021-06-12 19:29:47,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:29:47,195 INFO L225 Difference]: With dead ends: 27475 [2021-06-12 19:29:47,195 INFO L226 Difference]: Without dead ends: 27442 [2021-06-12 19:29:47,195 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 115.3ms TimeCoverageRelationStatistics Valid=114, Invalid=228, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:29:47,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27442 states. [2021-06-12 19:29:47,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27442 to 22408. [2021-06-12 19:29:47,494 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) [2021-06-12 19:29:47,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22408 states to 22408 states and 58371 transitions. [2021-06-12 19:29:47,533 INFO L78 Accepts]: Start accepts. Automaton has 22408 states and 58371 transitions. Word has length 65 [2021-06-12 19:29:47,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:29:47,533 INFO L482 AbstractCegarLoop]: Abstraction has 22408 states and 58371 transitions. [2021-06-12 19:29:47,533 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) [2021-06-12 19:29:47,534 INFO L276 IsEmpty]: Start isEmpty. Operand 22408 states and 58371 transitions. [2021-06-12 19:29:47,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-12 19:29:47,550 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:29:47,550 INFO L472 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:29:47,750 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 631 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1349 [2021-06-12 19:29:47,750 INFO L430 AbstractCegarLoop]: === Iteration 640 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:29:47,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:29:47,750 INFO L82 PathProgramCache]: Analyzing trace with hash -544826232, now seen corresponding path program 392 times [2021-06-12 19:29:47,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:29:47,751 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019658282] [2021-06-12 19:29:47,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:29:47,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:29:47,898 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 19 proven. 204 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:29:47,898 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:29:47,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019658282] [2021-06-12 19:29:47,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019658282] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:29:47,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874309093] [2021-06-12 19:29:47,899 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 [2021-06-12 19:29:47,928 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:29:47,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:29:47,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-12 19:29:47,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:29:48,021 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 18 proven. 205 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:29:48,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [874309093] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:29:48,021 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:29:48,021 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-12 19:29:48,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240657194] [2021-06-12 19:29:48,022 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:29:48,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:29:48,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:29:48,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:29:48,022 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) [2021-06-12 19:29:49,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:29:49,949 INFO L93 Difference]: Finished difference Result 41984 states and 101118 transitions. [2021-06-12 19:29:49,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-06-12 19:29:49,950 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 [2021-06-12 19:29:49,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:29:50,001 INFO L225 Difference]: With dead ends: 41984 [2021-06-12 19:29:50,001 INFO L226 Difference]: Without dead ends: 41462 [2021-06-12 19:29:50,002 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 68 SyntacticMatches, 2 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2412 ImplicationChecksByTransitivity, 1048.3ms TimeCoverageRelationStatistics Valid=663, Invalid=6477, Unknown=0, NotChecked=0, Total=7140 [2021-06-12 19:29:50,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41462 states. [2021-06-12 19:29:50,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41462 to 23564. [2021-06-12 19:29:50,437 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) [2021-06-12 19:29:50,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23564 states to 23564 states and 61364 transitions. [2021-06-12 19:29:50,478 INFO L78 Accepts]: Start accepts. Automaton has 23564 states and 61364 transitions. Word has length 65 [2021-06-12 19:29:50,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:29:50,478 INFO L482 AbstractCegarLoop]: Abstraction has 23564 states and 61364 transitions. [2021-06-12 19:29:50,478 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) [2021-06-12 19:29:50,478 INFO L276 IsEmpty]: Start isEmpty. Operand 23564 states and 61364 transitions. [2021-06-12 19:29:50,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-12 19:29:50,494 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:29:50,494 INFO L472 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:29:50,695 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 632 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1354 [2021-06-12 19:29:50,695 INFO L430 AbstractCegarLoop]: === Iteration 641 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:29:50,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:29:50,695 INFO L82 PathProgramCache]: Analyzing trace with hash 1348746637, now seen corresponding path program 393 times [2021-06-12 19:29:50,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:29:50,695 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61583635] [2021-06-12 19:29:50,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:29:50,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:29:50,802 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 55 proven. 171 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:29:50,803 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:29:50,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61583635] [2021-06-12 19:29:50,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61583635] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:29:50,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780104739] [2021-06-12 19:29:50,803 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 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 [2021-06-12 19:29:50,837 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-06-12 19:29:50,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:29:50,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:29:50,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:29:50,931 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 55 proven. 171 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:29:50,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1780104739] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:29:50,931 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:29:50,931 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-06-12 19:29:50,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682412078] [2021-06-12 19:29:50,931 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:29:50,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:29:50,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:29:50,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:29:50,932 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) [2021-06-12 19:29:51,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:29:51,308 INFO L93 Difference]: Finished difference Result 28863 states and 70675 transitions. [2021-06-12 19:29:51,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 19:29:51,309 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 [2021-06-12 19:29:51,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:29:51,350 INFO L225 Difference]: With dead ends: 28863 [2021-06-12 19:29:51,350 INFO L226 Difference]: Without dead ends: 28821 [2021-06-12 19:29:51,350 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 136.1ms TimeCoverageRelationStatistics Valid=134, Invalid=286, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:29:51,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28821 states. [2021-06-12 19:29:51,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28821 to 23564. [2021-06-12 19:29:51,680 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) [2021-06-12 19:29:51,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23564 states to 23564 states and 61355 transitions. [2021-06-12 19:29:51,721 INFO L78 Accepts]: Start accepts. Automaton has 23564 states and 61355 transitions. Word has length 65 [2021-06-12 19:29:51,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:29:51,721 INFO L482 AbstractCegarLoop]: Abstraction has 23564 states and 61355 transitions. [2021-06-12 19:29:51,721 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) [2021-06-12 19:29:51,721 INFO L276 IsEmpty]: Start isEmpty. Operand 23564 states and 61355 transitions. [2021-06-12 19:29:51,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-12 19:29:51,738 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:29:51,738 INFO L472 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:29:51,938 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 633 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1355 [2021-06-12 19:29:51,938 INFO L430 AbstractCegarLoop]: === Iteration 642 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:29:51,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:29:51,938 INFO L82 PathProgramCache]: Analyzing trace with hash -698140098, now seen corresponding path program 394 times [2021-06-12 19:29:51,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:29:51,939 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973974298] [2021-06-12 19:29:51,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:29:51,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:29:52,090 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 19 proven. 204 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:29:52,090 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:29:52,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973974298] [2021-06-12 19:29:52,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973974298] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:29:52,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739673744] [2021-06-12 19:29:52,090 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 [2021-06-12 19:29:52,120 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:29:52,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:29:52,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-12 19:29:52,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:29:52,214 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 18 proven. 205 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:29:52,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739673744] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:29:52,214 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:29:52,215 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-06-12 19:29:52,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586271066] [2021-06-12 19:29:52,215 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:29:52,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:29:52,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:29:52,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:29:52,215 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) [2021-06-12 19:29:55,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:29:55,040 INFO L93 Difference]: Finished difference Result 53425 states and 127611 transitions. [2021-06-12 19:29:55,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2021-06-12 19:29:55,041 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 [2021-06-12 19:29:55,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:29:55,122 INFO L225 Difference]: With dead ends: 53425 [2021-06-12 19:29:55,123 INFO L226 Difference]: Without dead ends: 52807 [2021-06-12 19:29:55,123 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 67 SyntacticMatches, 2 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6795 ImplicationChecksByTransitivity, 1779.1ms TimeCoverageRelationStatistics Valid=1473, Invalid=16083, Unknown=0, NotChecked=0, Total=17556 [2021-06-12 19:29:55,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52807 states. [2021-06-12 19:29:55,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52807 to 24483. [2021-06-12 19:29:55,619 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) [2021-06-12 19:29:55,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24483 states to 24483 states and 63725 transitions. [2021-06-12 19:29:55,660 INFO L78 Accepts]: Start accepts. Automaton has 24483 states and 63725 transitions. Word has length 65 [2021-06-12 19:29:55,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:29:55,661 INFO L482 AbstractCegarLoop]: Abstraction has 24483 states and 63725 transitions. [2021-06-12 19:29:55,661 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) [2021-06-12 19:29:55,661 INFO L276 IsEmpty]: Start isEmpty. Operand 24483 states and 63725 transitions. [2021-06-12 19:29:55,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-12 19:29:55,676 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:29:55,676 INFO L472 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:29:55,876 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1361,634 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:29:55,876 INFO L430 AbstractCegarLoop]: === Iteration 643 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:29:55,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:29:55,877 INFO L82 PathProgramCache]: Analyzing trace with hash 51277555, now seen corresponding path program 395 times [2021-06-12 19:29:55,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:29:55,877 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011397391] [2021-06-12 19:29:55,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:29:55,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:29:55,995 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 62 proven. 164 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:29:55,995 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:29:55,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011397391] [2021-06-12 19:29:55,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011397391] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:29:55,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712654483] [2021-06-12 19:29:55,995 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 [2021-06-12 19:29:56,027 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-06-12 19:29:56,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:29:56,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:29:56,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:29:56,163 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 62 proven. 164 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:29:56,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1712654483] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:29:56,164 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:29:56,164 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 20 [2021-06-12 19:29:56,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672397461] [2021-06-12 19:29:56,164 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-12 19:29:56,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:29:56,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-12 19:29:56,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=314, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:29:56,164 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) [2021-06-12 19:29:56,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:29:56,564 INFO L93 Difference]: Finished difference Result 30034 states and 73553 transitions. [2021-06-12 19:29:56,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 19:29:56,564 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 [2021-06-12 19:29:56,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:29:56,604 INFO L225 Difference]: With dead ends: 30034 [2021-06-12 19:29:56,604 INFO L226 Difference]: Without dead ends: 29983 [2021-06-12 19:29:56,604 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 195.6ms TimeCoverageRelationStatistics Valid=183, Invalid=519, Unknown=0, NotChecked=0, Total=702 [2021-06-12 19:29:56,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29983 states. [2021-06-12 19:29:57,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29983 to 24023. [2021-06-12 19:29:57,165 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) [2021-06-12 19:29:57,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24023 states to 24023 states and 62434 transitions. [2021-06-12 19:29:57,206 INFO L78 Accepts]: Start accepts. Automaton has 24023 states and 62434 transitions. Word has length 65 [2021-06-12 19:29:57,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:29:57,206 INFO L482 AbstractCegarLoop]: Abstraction has 24023 states and 62434 transitions. [2021-06-12 19:29:57,206 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) [2021-06-12 19:29:57,206 INFO L276 IsEmpty]: Start isEmpty. Operand 24023 states and 62434 transitions. [2021-06-12 19:29:57,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-12 19:29:57,223 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:29:57,223 INFO L472 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:29:57,423 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1362,635 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:29:57,423 INFO L430 AbstractCegarLoop]: === Iteration 644 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:29:57,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:29:57,424 INFO L82 PathProgramCache]: Analyzing trace with hash 1773680840, now seen corresponding path program 396 times [2021-06-12 19:29:57,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:29:57,424 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683200577] [2021-06-12 19:29:57,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:29:57,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:29:57,839 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 18 proven. 207 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:29:57,839 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:29:57,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683200577] [2021-06-12 19:29:57,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683200577] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:29:57,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040667011] [2021-06-12 19:29:57,839 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 [2021-06-12 19:29:57,890 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2021-06-12 19:29:57,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:29:57,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-12 19:29:57,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:29:57,988 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 18 proven. 207 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:29:57,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1040667011] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:29:57,988 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:29:57,988 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 17 [2021-06-12 19:29:57,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919254494] [2021-06-12 19:29:57,988 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:29:57,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:29:57,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:29:57,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=271, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:29:57,989 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) [2021-06-12 19:29:59,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:29:59,191 INFO L93 Difference]: Finished difference Result 34769 states and 84689 transitions. [2021-06-12 19:29:59,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-12 19:29:59,191 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 [2021-06-12 19:29:59,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:29:59,236 INFO L225 Difference]: With dead ends: 34769 [2021-06-12 19:29:59,236 INFO L226 Difference]: Without dead ends: 33929 [2021-06-12 19:29:59,236 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 66 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 521.2ms TimeCoverageRelationStatistics Valid=187, Invalid=1145, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 19:29:59,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33929 states. [2021-06-12 19:29:59,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33929 to 20717. [2021-06-12 19:29:59,567 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) [2021-06-12 19:29:59,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20717 states to 20717 states and 53736 transitions. [2021-06-12 19:29:59,598 INFO L78 Accepts]: Start accepts. Automaton has 20717 states and 53736 transitions. Word has length 65 [2021-06-12 19:29:59,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:29:59,598 INFO L482 AbstractCegarLoop]: Abstraction has 20717 states and 53736 transitions. [2021-06-12 19:29:59,598 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) [2021-06-12 19:29:59,598 INFO L276 IsEmpty]: Start isEmpty. Operand 20717 states and 53736 transitions. [2021-06-12 19:29:59,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-12 19:29:59,612 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:29:59,612 INFO L472 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:29:59,812 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 636 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1369 [2021-06-12 19:29:59,812 INFO L430 AbstractCegarLoop]: === Iteration 645 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:29:59,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:29:59,812 INFO L82 PathProgramCache]: Analyzing trace with hash 1535619323, now seen corresponding path program 190 times [2021-06-12 19:29:59,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:29:59,812 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993213276] [2021-06-12 19:29:59,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:29:59,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:29:59,906 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 175 proven. 52 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:29:59,906 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:29:59,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993213276] [2021-06-12 19:29:59,907 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993213276] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:29:59,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411387817] [2021-06-12 19:29:59,907 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 [2021-06-12 19:30:00,019 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:30:00,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:30:00,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:30:00,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:30:00,117 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 176 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:30:00,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1411387817] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:30:00,117 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:30:00,117 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 13 [2021-06-12 19:30:00,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733249355] [2021-06-12 19:30:00,118 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:30:00,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:30:00,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:30:00,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=105, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:30:00,118 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) [2021-06-12 19:30:00,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:30:00,418 INFO L93 Difference]: Finished difference Result 25901 states and 64415 transitions. [2021-06-12 19:30:00,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:30:00,418 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 [2021-06-12 19:30:00,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:30:00,453 INFO L225 Difference]: With dead ends: 25901 [2021-06-12 19:30:00,453 INFO L226 Difference]: Without dead ends: 25881 [2021-06-12 19:30:00,453 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 92.9ms TimeCoverageRelationStatistics Valid=97, Invalid=143, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:30:00,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25881 states. [2021-06-12 19:30:00,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25881 to 21398. [2021-06-12 19:30:00,798 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) [2021-06-12 19:30:00,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21398 states to 21398 states and 55600 transitions. [2021-06-12 19:30:00,832 INFO L78 Accepts]: Start accepts. Automaton has 21398 states and 55600 transitions. Word has length 65 [2021-06-12 19:30:00,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:30:00,832 INFO L482 AbstractCegarLoop]: Abstraction has 21398 states and 55600 transitions. [2021-06-12 19:30:00,832 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) [2021-06-12 19:30:00,832 INFO L276 IsEmpty]: Start isEmpty. Operand 21398 states and 55600 transitions. [2021-06-12 19:30:00,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-12 19:30:00,846 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:30:00,846 INFO L472 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:30:01,046 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1370,637 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:30:01,047 INFO L430 AbstractCegarLoop]: === Iteration 646 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:30:01,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:30:01,047 INFO L82 PathProgramCache]: Analyzing trace with hash 913738913, now seen corresponding path program 191 times [2021-06-12 19:30:01,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:30:01,047 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510659818] [2021-06-12 19:30:01,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:30:01,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:30:01,124 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 175 proven. 51 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:30:01,124 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:30:01,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510659818] [2021-06-12 19:30:01,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510659818] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:30:01,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041046346] [2021-06-12 19:30:01,125 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 [2021-06-12 19:30:01,162 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2021-06-12 19:30:01,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:30:01,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:30:01,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:30:01,373 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 177 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:30:01,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2041046346] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:30:01,374 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:30:01,374 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 22] total 24 [2021-06-12 19:30:01,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199093655] [2021-06-12 19:30:01,374 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-12 19:30:01,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:30:01,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-12 19:30:01,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=365, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:30:01,374 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) [2021-06-12 19:30:02,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:30:02,217 INFO L93 Difference]: Finished difference Result 34523 states and 84310 transitions. [2021-06-12 19:30:02,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-12 19:30:02,218 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 [2021-06-12 19:30:02,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:30:02,259 INFO L225 Difference]: With dead ends: 34523 [2021-06-12 19:30:02,260 INFO L226 Difference]: Without dead ends: 34523 [2021-06-12 19:30:02,260 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 385.5ms TimeCoverageRelationStatistics Valid=591, Invalid=891, Unknown=0, NotChecked=0, Total=1482 [2021-06-12 19:30:02,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34523 states. [2021-06-12 19:30:02,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34523 to 21413. [2021-06-12 19:30:02,664 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) [2021-06-12 19:30:02,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21413 states to 21413 states and 55645 transitions. [2021-06-12 19:30:02,702 INFO L78 Accepts]: Start accepts. Automaton has 21413 states and 55645 transitions. Word has length 65 [2021-06-12 19:30:02,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:30:02,702 INFO L482 AbstractCegarLoop]: Abstraction has 21413 states and 55645 transitions. [2021-06-12 19:30:02,702 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) [2021-06-12 19:30:02,702 INFO L276 IsEmpty]: Start isEmpty. Operand 21413 states and 55645 transitions. [2021-06-12 19:30:02,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-12 19:30:02,718 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:30:02,718 INFO L472 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:30:02,918 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1372,638 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:30:02,918 INFO L430 AbstractCegarLoop]: === Iteration 647 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:30:02,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:30:02,919 INFO L82 PathProgramCache]: Analyzing trace with hash -723833543, now seen corresponding path program 192 times [2021-06-12 19:30:02,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:30:02,919 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394843131] [2021-06-12 19:30:02,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:30:02,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:30:03,007 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 173 proven. 53 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:30:03,008 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:30:03,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394843131] [2021-06-12 19:30:03,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394843131] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:30:03,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294334035] [2021-06-12 19:30:03,008 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-12 19:30:03,044 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2021-06-12 19:30:03,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:30:03,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:30:03,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:30:03,148 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 174 proven. 53 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:30:03,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1294334035] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:30:03,148 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:30:03,148 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 14 [2021-06-12 19:30:03,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204566925] [2021-06-12 19:30:03,148 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:30:03,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:30:03,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:30:03,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=130, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:30:03,148 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) [2021-06-12 19:30:03,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:30:03,591 INFO L93 Difference]: Finished difference Result 36708 states and 89413 transitions. [2021-06-12 19:30:03,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 19:30:03,591 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 [2021-06-12 19:30:03,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:30:03,763 INFO L225 Difference]: With dead ends: 36708 [2021-06-12 19:30:03,763 INFO L226 Difference]: Without dead ends: 36708 [2021-06-12 19:30:03,764 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 177.0ms TimeCoverageRelationStatistics Valid=259, Invalid=391, Unknown=0, NotChecked=0, Total=650 [2021-06-12 19:30:03,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36708 states. [2021-06-12 19:30:04,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36708 to 21464. [2021-06-12 19:30:04,217 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) [2021-06-12 19:30:04,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21464 states to 21464 states and 55810 transitions. [2021-06-12 19:30:04,259 INFO L78 Accepts]: Start accepts. Automaton has 21464 states and 55810 transitions. Word has length 65 [2021-06-12 19:30:04,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:30:04,260 INFO L482 AbstractCegarLoop]: Abstraction has 21464 states and 55810 transitions. [2021-06-12 19:30:04,260 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) [2021-06-12 19:30:04,260 INFO L276 IsEmpty]: Start isEmpty. Operand 21464 states and 55810 transitions. [2021-06-12 19:30:04,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-12 19:30:04,276 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:30:04,276 INFO L472 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:30:04,477 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1373,639 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:30:04,477 INFO L430 AbstractCegarLoop]: === Iteration 648 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:30:04,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:30:04,477 INFO L82 PathProgramCache]: Analyzing trace with hash 1881138589, now seen corresponding path program 193 times [2021-06-12 19:30:04,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:30:04,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123022019] [2021-06-12 19:30:04,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:30:04,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:30:04,585 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 163 proven. 63 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:30:04,585 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:30:04,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123022019] [2021-06-12 19:30:04,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123022019] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:30:04,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918212397] [2021-06-12 19:30:04,585 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 [2021-06-12 19:30:04,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:30:04,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:30:04,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:30:04,730 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 164 proven. 63 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:30:04,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1918212397] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:30:04,731 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:30:04,731 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 15 [2021-06-12 19:30:04,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138379906] [2021-06-12 19:30:04,731 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:30:04,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:30:04,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:30:04,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:30:04,731 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) [2021-06-12 19:30:05,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:30:05,259 INFO L93 Difference]: Finished difference Result 37797 states and 91974 transitions. [2021-06-12 19:30:05,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 19:30:05,259 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 [2021-06-12 19:30:05,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:30:05,313 INFO L225 Difference]: With dead ends: 37797 [2021-06-12 19:30:05,314 INFO L226 Difference]: Without dead ends: 37797 [2021-06-12 19:30:05,314 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 238.3ms TimeCoverageRelationStatistics Valid=338, Invalid=532, Unknown=0, NotChecked=0, Total=870 [2021-06-12 19:30:05,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37797 states. [2021-06-12 19:30:05,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37797 to 21524. [2021-06-12 19:30:05,852 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) [2021-06-12 19:30:05,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21524 states to 21524 states and 56002 transitions. [2021-06-12 19:30:05,889 INFO L78 Accepts]: Start accepts. Automaton has 21524 states and 56002 transitions. Word has length 65 [2021-06-12 19:30:05,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:30:05,889 INFO L482 AbstractCegarLoop]: Abstraction has 21524 states and 56002 transitions. [2021-06-12 19:30:05,889 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) [2021-06-12 19:30:05,889 INFO L276 IsEmpty]: Start isEmpty. Operand 21524 states and 56002 transitions. [2021-06-12 19:30:05,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-12 19:30:05,905 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:30:05,905 INFO L472 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:30:06,105 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 640 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1374 [2021-06-12 19:30:06,106 INFO L430 AbstractCegarLoop]: === Iteration 649 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:30:06,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:30:06,106 INFO L82 PathProgramCache]: Analyzing trace with hash 841851577, now seen corresponding path program 194 times [2021-06-12 19:30:06,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:30:06,106 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752068685] [2021-06-12 19:30:06,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:30:06,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:30:06,217 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 153 proven. 73 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:30:06,217 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:30:06,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752068685] [2021-06-12 19:30:06,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752068685] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:30:06,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244772193] [2021-06-12 19:30:06,217 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 [2021-06-12 19:30:06,246 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:30:06,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:30:06,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:30:06,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:30:06,350 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 154 proven. 73 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:30:06,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [244772193] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:30:06,351 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:30:06,351 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 16 [2021-06-12 19:30:06,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096874357] [2021-06-12 19:30:06,351 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:30:06,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:30:06,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:30:06,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:30:06,351 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) [2021-06-12 19:30:06,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:30:06,924 INFO L93 Difference]: Finished difference Result 36105 states and 88048 transitions. [2021-06-12 19:30:06,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 19:30:06,924 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 [2021-06-12 19:30:06,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:30:06,974 INFO L225 Difference]: With dead ends: 36105 [2021-06-12 19:30:06,974 INFO L226 Difference]: Without dead ends: 36105 [2021-06-12 19:30:06,974 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 247.2ms TimeCoverageRelationStatistics Valid=381, Invalid=611, Unknown=0, NotChecked=0, Total=992 [2021-06-12 19:30:07,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36105 states. [2021-06-12 19:30:07,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36105 to 21553. [2021-06-12 19:30:07,410 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) [2021-06-12 19:30:07,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21553 states to 21553 states and 56085 transitions. [2021-06-12 19:30:07,447 INFO L78 Accepts]: Start accepts. Automaton has 21553 states and 56085 transitions. Word has length 65 [2021-06-12 19:30:07,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:30:07,447 INFO L482 AbstractCegarLoop]: Abstraction has 21553 states and 56085 transitions. [2021-06-12 19:30:07,447 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) [2021-06-12 19:30:07,447 INFO L276 IsEmpty]: Start isEmpty. Operand 21553 states and 56085 transitions. [2021-06-12 19:30:07,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-12 19:30:07,543 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:30:07,543 INFO L472 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:30:07,743 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 641 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1375 [2021-06-12 19:30:07,743 INFO L430 AbstractCegarLoop]: === Iteration 650 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:30:07,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:30:07,743 INFO L82 PathProgramCache]: Analyzing trace with hash 1861713949, now seen corresponding path program 195 times [2021-06-12 19:30:07,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:30:07,744 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053364529] [2021-06-12 19:30:07,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:30:07,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:30:07,878 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 143 proven. 83 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:30:07,878 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:30:07,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053364529] [2021-06-12 19:30:07,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053364529] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:30:07,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67479080] [2021-06-12 19:30:07,878 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 [2021-06-12 19:30:07,916 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2021-06-12 19:30:07,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:30:07,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-12 19:30:07,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:30:08,105 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 184 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:30:08,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [67479080] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:30:08,106 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:30:08,106 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 22 [2021-06-12 19:30:08,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859814690] [2021-06-12 19:30:08,106 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-06-12 19:30:08,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:30:08,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-06-12 19:30:08,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=336, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:30:08,106 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) [2021-06-12 19:30:08,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:30:08,663 INFO L93 Difference]: Finished difference Result 25993 states and 64689 transitions. [2021-06-12 19:30:08,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 19:30:08,664 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 [2021-06-12 19:30:08,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:30:08,695 INFO L225 Difference]: With dead ends: 25993 [2021-06-12 19:30:08,696 INFO L226 Difference]: Without dead ends: 25993 [2021-06-12 19:30:08,696 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 272.0ms TimeCoverageRelationStatistics Valid=288, Invalid=524, Unknown=0, NotChecked=0, Total=812 [2021-06-12 19:30:08,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25993 states. [2021-06-12 19:30:09,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25993 to 20708. [2021-06-12 19:30:09,038 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) [2021-06-12 19:30:09,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20708 states to 20708 states and 53740 transitions. [2021-06-12 19:30:09,072 INFO L78 Accepts]: Start accepts. Automaton has 20708 states and 53740 transitions. Word has length 65 [2021-06-12 19:30:09,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:30:09,072 INFO L482 AbstractCegarLoop]: Abstraction has 20708 states and 53740 transitions. [2021-06-12 19:30:09,072 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) [2021-06-12 19:30:09,072 INFO L276 IsEmpty]: Start isEmpty. Operand 20708 states and 53740 transitions. [2021-06-12 19:30:09,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-12 19:30:09,088 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:30:09,088 INFO L472 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:30:09,288 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 642 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1376 [2021-06-12 19:30:09,289 INFO L430 AbstractCegarLoop]: === Iteration 651 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:30:09,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:30:09,289 INFO L82 PathProgramCache]: Analyzing trace with hash 1855519693, now seen corresponding path program 397 times [2021-06-12 19:30:09,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:30:09,289 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467357979] [2021-06-12 19:30:09,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:30:09,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:30:09,422 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 76 proven. 151 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:30:09,422 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:30:09,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467357979] [2021-06-12 19:30:09,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467357979] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:30:09,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653581653] [2021-06-12 19:30:09,422 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 [2021-06-12 19:30:09,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:30:09,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:30:09,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:30:09,548 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 76 proven. 151 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:30:09,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1653581653] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:30:09,548 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:30:09,548 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2021-06-12 19:30:09,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874756748] [2021-06-12 19:30:09,549 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:30:09,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:30:09,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:30:09,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:30:09,549 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) [2021-06-12 19:30:09,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:30:09,998 INFO L93 Difference]: Finished difference Result 25213 states and 61593 transitions. [2021-06-12 19:30:09,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 19:30:09,998 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 [2021-06-12 19:30:09,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:30:10,032 INFO L225 Difference]: With dead ends: 25213 [2021-06-12 19:30:10,032 INFO L226 Difference]: Without dead ends: 25159 [2021-06-12 19:30:10,032 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 188.3ms TimeCoverageRelationStatistics Valid=180, Invalid=420, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:30:10,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25159 states. [2021-06-12 19:30:10,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25159 to 20708. [2021-06-12 19:30:10,333 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) [2021-06-12 19:30:10,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20708 states to 20708 states and 53731 transitions. [2021-06-12 19:30:10,367 INFO L78 Accepts]: Start accepts. Automaton has 20708 states and 53731 transitions. Word has length 65 [2021-06-12 19:30:10,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:30:10,367 INFO L482 AbstractCegarLoop]: Abstraction has 20708 states and 53731 transitions. [2021-06-12 19:30:10,368 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) [2021-06-12 19:30:10,368 INFO L276 IsEmpty]: Start isEmpty. Operand 20708 states and 53731 transitions. [2021-06-12 19:30:10,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-12 19:30:10,383 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:30:10,383 INFO L472 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:30:10,583 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 643 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1379 [2021-06-12 19:30:10,583 INFO L430 AbstractCegarLoop]: === Iteration 652 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:30:10,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:30:10,584 INFO L82 PathProgramCache]: Analyzing trace with hash 2136980874, now seen corresponding path program 196 times [2021-06-12 19:30:10,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:30:10,584 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791823263] [2021-06-12 19:30:10,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:30:10,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:30:10,692 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 10 proven. 213 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:30:10,692 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:30:10,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791823263] [2021-06-12 19:30:10,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791823263] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:30:10,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057999374] [2021-06-12 19:30:10,692 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 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 [2021-06-12 19:30:10,722 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:30:10,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:30:10,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-12 19:30:10,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:30:10,906 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 9 proven. 214 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:30:10,907 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2057999374] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:30:10,907 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:30:10,907 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-12 19:30:10,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923844861] [2021-06-12 19:30:10,907 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:30:10,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:30:10,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:30:10,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:30:10,907 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) [2021-06-12 19:30:11,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:30:11,640 INFO L93 Difference]: Finished difference Result 22901 states and 58040 transitions. [2021-06-12 19:30:11,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 19:30:11,640 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 [2021-06-12 19:30:11,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:30:11,668 INFO L225 Difference]: With dead ends: 22901 [2021-06-12 19:30:11,668 INFO L226 Difference]: Without dead ends: 22879 [2021-06-12 19:30:11,668 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 70 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 176.1ms TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:30:11,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22879 states. [2021-06-12 19:30:12,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22879 to 21011. [2021-06-12 19:30:12,022 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) [2021-06-12 19:30:12,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21011 states to 21011 states and 54466 transitions. [2021-06-12 19:30:12,059 INFO L78 Accepts]: Start accepts. Automaton has 21011 states and 54466 transitions. Word has length 65 [2021-06-12 19:30:12,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:30:12,060 INFO L482 AbstractCegarLoop]: Abstraction has 21011 states and 54466 transitions. [2021-06-12 19:30:12,060 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) [2021-06-12 19:30:12,060 INFO L276 IsEmpty]: Start isEmpty. Operand 21011 states and 54466 transitions. [2021-06-12 19:30:12,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-12 19:30:12,075 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:30:12,075 INFO L472 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:30:12,275 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 644 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1387 [2021-06-12 19:30:12,275 INFO L430 AbstractCegarLoop]: === Iteration 653 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:30:12,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:30:12,276 INFO L82 PathProgramCache]: Analyzing trace with hash -657653430, now seen corresponding path program 398 times [2021-06-12 19:30:12,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:30:12,276 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745240136] [2021-06-12 19:30:12,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:30:12,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:30:12,385 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 22 proven. 201 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:30:12,385 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:30:12,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745240136] [2021-06-12 19:30:12,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745240136] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:30:12,385 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545567238] [2021-06-12 19:30:12,385 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 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 [2021-06-12 19:30:12,417 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:30:12,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:30:12,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-12 19:30:12,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:30:12,536 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 17 proven. 206 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:30:12,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [545567238] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:30:12,536 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:30:12,536 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-12 19:30:12,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401340739] [2021-06-12 19:30:12,536 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:30:12,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:30:12,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:30:12,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:30:12,537 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) [2021-06-12 19:30:13,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:30:13,440 INFO L93 Difference]: Finished difference Result 22325 states and 56767 transitions. [2021-06-12 19:30:13,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 19:30:13,441 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 [2021-06-12 19:30:13,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:30:13,467 INFO L225 Difference]: With dead ends: 22325 [2021-06-12 19:30:13,467 INFO L226 Difference]: Without dead ends: 22197 [2021-06-12 19:30:13,467 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 70 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 183.8ms TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:30:13,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22197 states. [2021-06-12 19:30:13,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22197 to 21057. [2021-06-12 19:30:13,798 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) [2021-06-12 19:30:13,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21057 states to 21057 states and 54445 transitions. [2021-06-12 19:30:13,832 INFO L78 Accepts]: Start accepts. Automaton has 21057 states and 54445 transitions. Word has length 65 [2021-06-12 19:30:13,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:30:13,833 INFO L482 AbstractCegarLoop]: Abstraction has 21057 states and 54445 transitions. [2021-06-12 19:30:13,833 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) [2021-06-12 19:30:13,833 INFO L276 IsEmpty]: Start isEmpty. Operand 21057 states and 54445 transitions. [2021-06-12 19:30:13,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-12 19:30:13,848 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:30:13,848 INFO L472 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:30:14,048 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 645 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1388 [2021-06-12 19:30:14,049 INFO L430 AbstractCegarLoop]: === Iteration 654 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:30:14,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:30:14,049 INFO L82 PathProgramCache]: Analyzing trace with hash -1271189610, now seen corresponding path program 399 times [2021-06-12 19:30:14,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:30:14,049 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271685322] [2021-06-12 19:30:14,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:30:14,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:30:14,158 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 19 proven. 202 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-12 19:30:14,158 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:30:14,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271685322] [2021-06-12 19:30:14,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271685322] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:30:14,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54258854] [2021-06-12 19:30:14,159 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 [2021-06-12 19:30:14,194 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2021-06-12 19:30:14,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:30:14,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-12 19:30:14,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:30:14,290 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 18 proven. 203 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-12 19:30:14,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [54258854] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:30:14,290 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:30:14,290 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-12 19:30:14,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202804172] [2021-06-12 19:30:14,290 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:30:14,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:30:14,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:30:14,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:30:14,291 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) [2021-06-12 19:30:15,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:30:15,060 INFO L93 Difference]: Finished difference Result 23159 states and 58564 transitions. [2021-06-12 19:30:15,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 19:30:15,061 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 [2021-06-12 19:30:15,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:30:15,083 INFO L225 Difference]: With dead ends: 23159 [2021-06-12 19:30:15,083 INFO L226 Difference]: Without dead ends: 23147 [2021-06-12 19:30:15,083 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 70 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 176.4ms TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:30:15,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23147 states. [2021-06-12 19:30:15,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23147 to 21201. [2021-06-12 19:30:15,336 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) [2021-06-12 19:30:15,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21201 states to 21201 states and 54809 transitions. [2021-06-12 19:30:15,368 INFO L78 Accepts]: Start accepts. Automaton has 21201 states and 54809 transitions. Word has length 65 [2021-06-12 19:30:15,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:30:15,368 INFO L482 AbstractCegarLoop]: Abstraction has 21201 states and 54809 transitions. [2021-06-12 19:30:15,368 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) [2021-06-12 19:30:15,368 INFO L276 IsEmpty]: Start isEmpty. Operand 21201 states and 54809 transitions. [2021-06-12 19:30:15,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-12 19:30:15,383 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:30:15,383 INFO L472 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:30:15,583 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 646 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1389 [2021-06-12 19:30:15,583 INFO L430 AbstractCegarLoop]: === Iteration 655 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:30:15,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:30:15,583 INFO L82 PathProgramCache]: Analyzing trace with hash -1428489097, now seen corresponding path program 197 times [2021-06-12 19:30:15,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:30:15,583 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629309727] [2021-06-12 19:30:15,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:30:15,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:30:15,660 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 146 proven. 80 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:30:15,660 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:30:15,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629309727] [2021-06-12 19:30:15,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629309727] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:30:15,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771506806] [2021-06-12 19:30:15,660 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 [2021-06-12 19:30:15,695 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2021-06-12 19:30:15,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:30:15,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:30:15,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:30:15,842 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 147 proven. 80 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:30:15,842 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [771506806] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:30:15,842 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:30:15,842 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 18] total 21 [2021-06-12 19:30:15,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726691788] [2021-06-12 19:30:15,842 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-12 19:30:15,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:30:15,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-12 19:30:15,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=303, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:30:15,843 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) [2021-06-12 19:30:16,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:30:16,222 INFO L93 Difference]: Finished difference Result 25604 states and 63733 transitions. [2021-06-12 19:30:16,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-12 19:30:16,222 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 [2021-06-12 19:30:16,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:30:16,256 INFO L225 Difference]: With dead ends: 25604 [2021-06-12 19:30:16,256 INFO L226 Difference]: Without dead ends: 25574 [2021-06-12 19:30:16,256 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 146.9ms TimeCoverageRelationStatistics Valid=194, Invalid=406, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:30:16,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25574 states. [2021-06-12 19:30:16,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25574 to 21847. [2021-06-12 19:30:16,584 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) [2021-06-12 19:30:16,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21847 states to 21847 states and 56548 transitions. [2021-06-12 19:30:16,620 INFO L78 Accepts]: Start accepts. Automaton has 21847 states and 56548 transitions. Word has length 65 [2021-06-12 19:30:16,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:30:16,620 INFO L482 AbstractCegarLoop]: Abstraction has 21847 states and 56548 transitions. [2021-06-12 19:30:16,620 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) [2021-06-12 19:30:16,620 INFO L276 IsEmpty]: Start isEmpty. Operand 21847 states and 56548 transitions. [2021-06-12 19:30:16,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-12 19:30:16,637 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:30:16,637 INFO L472 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:30:16,837 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1390,647 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:30:16,837 INFO L430 AbstractCegarLoop]: === Iteration 656 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:30:16,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:30:16,838 INFO L82 PathProgramCache]: Analyzing trace with hash 1375420183, now seen corresponding path program 400 times [2021-06-12 19:30:16,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:30:16,838 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330928113] [2021-06-12 19:30:16,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:30:16,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:30:16,916 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 68 proven. 157 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:30:16,917 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:30:16,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330928113] [2021-06-12 19:30:16,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330928113] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:30:16,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073683461] [2021-06-12 19:30:16,917 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 [2021-06-12 19:30:16,946 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:30:16,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:30:16,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:30:16,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:30:17,040 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 68 proven. 157 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:30:17,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1073683461] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:30:17,041 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:30:17,041 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-06-12 19:30:17,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906126037] [2021-06-12 19:30:17,041 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:30:17,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:30:17,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:30:17,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:30:17,041 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) [2021-06-12 19:30:17,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:30:17,290 INFO L93 Difference]: Finished difference Result 26845 states and 65318 transitions. [2021-06-12 19:30:17,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:30:17,290 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 [2021-06-12 19:30:17,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:30:17,322 INFO L225 Difference]: With dead ends: 26845 [2021-06-12 19:30:17,322 INFO L226 Difference]: Without dead ends: 26827 [2021-06-12 19:30:17,322 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 88.0ms TimeCoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:30:17,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26827 states. [2021-06-12 19:30:17,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26827 to 21826. [2021-06-12 19:30:17,702 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) [2021-06-12 19:30:17,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21826 states to 21826 states and 56456 transitions. [2021-06-12 19:30:17,738 INFO L78 Accepts]: Start accepts. Automaton has 21826 states and 56456 transitions. Word has length 65 [2021-06-12 19:30:17,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:30:17,738 INFO L482 AbstractCegarLoop]: Abstraction has 21826 states and 56456 transitions. [2021-06-12 19:30:17,738 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) [2021-06-12 19:30:17,738 INFO L276 IsEmpty]: Start isEmpty. Operand 21826 states and 56456 transitions. [2021-06-12 19:30:17,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-12 19:30:17,753 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:30:17,754 INFO L472 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:30:17,954 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1393,648 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:30:17,954 INFO L430 AbstractCegarLoop]: === Iteration 657 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:30:17,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:30:17,954 INFO L82 PathProgramCache]: Analyzing trace with hash 870727724, now seen corresponding path program 401 times [2021-06-12 19:30:17,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:30:17,954 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162846554] [2021-06-12 19:30:17,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:30:17,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:30:18,101 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 19 proven. 204 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:30:18,102 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:30:18,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162846554] [2021-06-12 19:30:18,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162846554] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:30:18,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881367025] [2021-06-12 19:30:18,102 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-12 19:30:18,141 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2021-06-12 19:30:18,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:30:18,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-12 19:30:18,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:30:18,235 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 18 proven. 205 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:30:18,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1881367025] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:30:18,236 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:30:18,236 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-12 19:30:18,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227010346] [2021-06-12 19:30:18,236 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:30:18,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:30:18,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:30:18,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:30:18,236 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) [2021-06-12 19:30:19,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:30:19,260 INFO L93 Difference]: Finished difference Result 26191 states and 65578 transitions. [2021-06-12 19:30:19,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-12 19:30:19,260 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 [2021-06-12 19:30:19,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:30:19,290 INFO L225 Difference]: With dead ends: 26191 [2021-06-12 19:30:19,290 INFO L226 Difference]: Without dead ends: 26137 [2021-06-12 19:30:19,290 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 70 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 341.6ms TimeCoverageRelationStatistics Valid=135, Invalid=1055, Unknown=0, NotChecked=0, Total=1190 [2021-06-12 19:30:19,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26137 states. [2021-06-12 19:30:19,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26137 to 22289. [2021-06-12 19:30:19,665 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) [2021-06-12 19:30:19,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22289 states to 22289 states and 57714 transitions. [2021-06-12 19:30:19,706 INFO L78 Accepts]: Start accepts. Automaton has 22289 states and 57714 transitions. Word has length 65 [2021-06-12 19:30:19,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:30:19,706 INFO L482 AbstractCegarLoop]: Abstraction has 22289 states and 57714 transitions. [2021-06-12 19:30:19,706 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) [2021-06-12 19:30:19,706 INFO L276 IsEmpty]: Start isEmpty. Operand 22289 states and 57714 transitions. [2021-06-12 19:30:19,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-12 19:30:19,723 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:30:19,723 INFO L472 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:30:19,923 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 649 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1396 [2021-06-12 19:30:19,923 INFO L430 AbstractCegarLoop]: === Iteration 658 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:30:19,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:30:19,923 INFO L82 PathProgramCache]: Analyzing trace with hash -1891680463, now seen corresponding path program 402 times [2021-06-12 19:30:19,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:30:19,924 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351610884] [2021-06-12 19:30:19,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:30:19,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:30:20,011 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 63 proven. 163 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:30:20,011 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:30:20,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351610884] [2021-06-12 19:30:20,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351610884] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:30:20,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356161776] [2021-06-12 19:30:20,011 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 [2021-06-12 19:30:20,048 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-06-12 19:30:20,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:30:20,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:30:20,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:30:20,142 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 63 proven. 163 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:30:20,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [356161776] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:30:20,142 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:30:20,142 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-06-12 19:30:20,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267849427] [2021-06-12 19:30:20,142 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:30:20,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:30:20,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:30:20,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:30:20,143 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) [2021-06-12 19:30:20,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:30:20,413 INFO L93 Difference]: Finished difference Result 27384 states and 66666 transitions. [2021-06-12 19:30:20,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:30:20,414 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.571428571428571) internal successors, (64), 13 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-06-12 19:30:20,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:30:20,451 INFO L225 Difference]: With dead ends: 27384 [2021-06-12 19:30:20,451 INFO L226 Difference]: Without dead ends: 27360 [2021-06-12 19:30:20,451 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 97.1ms TimeCoverageRelationStatistics Valid=99, Invalid=173, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:30:20,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27360 states. [2021-06-12 19:30:20,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27360 to 22289. [2021-06-12 19:30:20,906 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) [2021-06-12 19:30:20,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22289 states to 22289 states and 57697 transitions. [2021-06-12 19:30:20,947 INFO L78 Accepts]: Start accepts. Automaton has 22289 states and 57697 transitions. Word has length 65 [2021-06-12 19:30:20,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:30:20,947 INFO L482 AbstractCegarLoop]: Abstraction has 22289 states and 57697 transitions. [2021-06-12 19:30:20,947 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) [2021-06-12 19:30:20,947 INFO L276 IsEmpty]: Start isEmpty. Operand 22289 states and 57697 transitions. [2021-06-12 19:30:20,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-12 19:30:20,963 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:30:20,963 INFO L472 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:30:21,164 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 650 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1397 [2021-06-12 19:30:21,164 INFO L430 AbstractCegarLoop]: === Iteration 659 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:30:21,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:30:21,164 INFO L82 PathProgramCache]: Analyzing trace with hash 1025564258, now seen corresponding path program 403 times [2021-06-12 19:30:21,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:30:21,164 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79684490] [2021-06-12 19:30:21,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:30:21,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:30:21,281 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 19 proven. 204 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:30:21,281 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:30:21,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79684490] [2021-06-12 19:30:21,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79684490] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:30:21,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318494237] [2021-06-12 19:30:21,281 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 [2021-06-12 19:30:21,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:30:21,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-12 19:30:21,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:30:21,405 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 18 proven. 205 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:30:21,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1318494237] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:30:21,405 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:30:21,405 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-12 19:30:21,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771786120] [2021-06-12 19:30:21,406 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:30:21,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:30:21,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:30:21,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:30:21,406 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) [2021-06-12 19:30:22,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:30:22,847 INFO L93 Difference]: Finished difference Result 31771 states and 78106 transitions. [2021-06-12 19:30:22,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-12 19:30:22,847 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 [2021-06-12 19:30:22,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:30:23,023 INFO L225 Difference]: With dead ends: 31771 [2021-06-12 19:30:23,024 INFO L226 Difference]: Without dead ends: 31603 [2021-06-12 19:30:23,024 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 69 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 989 ImplicationChecksByTransitivity, 598.5ms TimeCoverageRelationStatistics Valid=333, Invalid=3089, Unknown=0, NotChecked=0, Total=3422 [2021-06-12 19:30:23,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31603 states. [2021-06-12 19:30:23,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31603 to 23236. [2021-06-12 19:30:23,386 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) [2021-06-12 19:30:23,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23236 states to 23236 states and 60190 transitions. [2021-06-12 19:30:23,423 INFO L78 Accepts]: Start accepts. Automaton has 23236 states and 60190 transitions. Word has length 65 [2021-06-12 19:30:23,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:30:23,423 INFO L482 AbstractCegarLoop]: Abstraction has 23236 states and 60190 transitions. [2021-06-12 19:30:23,423 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) [2021-06-12 19:30:23,423 INFO L276 IsEmpty]: Start isEmpty. Operand 23236 states and 60190 transitions. [2021-06-12 19:30:23,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-12 19:30:23,437 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:30:23,437 INFO L472 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:30:23,638 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 651 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1401 [2021-06-12 19:30:23,638 INFO L430 AbstractCegarLoop]: === Iteration 660 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:30:23,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:30:23,638 INFO L82 PathProgramCache]: Analyzing trace with hash 1412166935, now seen corresponding path program 404 times [2021-06-12 19:30:23,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:30:23,638 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871087192] [2021-06-12 19:30:23,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:30:23,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:30:23,735 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 55 proven. 171 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:30:23,736 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:30:23,736 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871087192] [2021-06-12 19:30:23,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871087192] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:30:23,736 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416407931] [2021-06-12 19:30:23,736 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 [2021-06-12 19:30:23,765 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:30:23,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:30:23,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:30:23,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:30:23,861 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 55 proven. 171 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:30:23,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1416407931] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:30:23,861 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:30:23,861 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-06-12 19:30:23,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878934065] [2021-06-12 19:30:23,861 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:30:23,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:30:23,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:30:23,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:30:23,862 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) [2021-06-12 19:30:24,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:30:24,142 INFO L93 Difference]: Finished difference Result 28515 states and 69490 transitions. [2021-06-12 19:30:24,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:30:24,143 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 [2021-06-12 19:30:24,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:30:24,182 INFO L225 Difference]: With dead ends: 28515 [2021-06-12 19:30:24,182 INFO L226 Difference]: Without dead ends: 28482 [2021-06-12 19:30:24,182 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 116.0ms TimeCoverageRelationStatistics Valid=118, Invalid=224, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:30:24,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28482 states. [2021-06-12 19:30:24,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28482 to 23236. [2021-06-12 19:30:24,568 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) [2021-06-12 19:30:24,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23236 states to 23236 states and 60181 transitions. [2021-06-12 19:30:24,607 INFO L78 Accepts]: Start accepts. Automaton has 23236 states and 60181 transitions. Word has length 65 [2021-06-12 19:30:24,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:30:24,607 INFO L482 AbstractCegarLoop]: Abstraction has 23236 states and 60181 transitions. [2021-06-12 19:30:24,607 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) [2021-06-12 19:30:24,607 INFO L276 IsEmpty]: Start isEmpty. Operand 23236 states and 60181 transitions. [2021-06-12 19:30:24,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-12 19:30:24,622 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:30:24,622 INFO L472 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:30:24,822 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 652 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1402 [2021-06-12 19:30:24,822 INFO L430 AbstractCegarLoop]: === Iteration 661 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:30:24,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:30:24,823 INFO L82 PathProgramCache]: Analyzing trace with hash 965872748, now seen corresponding path program 405 times [2021-06-12 19:30:24,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:30:24,823 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577017284] [2021-06-12 19:30:24,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:30:24,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:30:24,955 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 19 proven. 204 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:30:24,955 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:30:24,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577017284] [2021-06-12 19:30:24,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577017284] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:30:24,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367046903] [2021-06-12 19:30:24,955 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 [2021-06-12 19:30:24,991 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2021-06-12 19:30:24,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:30:24,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-12 19:30:24,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:30:25,086 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 18 proven. 205 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:30:25,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1367046903] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:30:25,086 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:30:25,086 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-06-12 19:30:25,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739669577] [2021-06-12 19:30:25,086 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:30:25,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:30:25,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:30:25,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:30:25,087 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) [2021-06-12 19:30:26,032 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2021-06-12 19:30:27,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:30:27,384 INFO L93 Difference]: Finished difference Result 43429 states and 104578 transitions. [2021-06-12 19:30:27,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2021-06-12 19:30:27,384 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 [2021-06-12 19:30:27,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:30:27,442 INFO L225 Difference]: With dead ends: 43429 [2021-06-12 19:30:27,442 INFO L226 Difference]: Without dead ends: 42973 [2021-06-12 19:30:27,443 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 68 SyntacticMatches, 2 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3483 ImplicationChecksByTransitivity, 1277.7ms TimeCoverageRelationStatistics Valid=819, Invalid=8883, Unknown=0, NotChecked=0, Total=9702 [2021-06-12 19:30:27,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42973 states. [2021-06-12 19:30:27,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42973 to 24902. [2021-06-12 19:30:27,991 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) [2021-06-12 19:30:28,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24902 states to 24902 states and 64511 transitions. [2021-06-12 19:30:28,036 INFO L78 Accepts]: Start accepts. Automaton has 24902 states and 64511 transitions. Word has length 65 [2021-06-12 19:30:28,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:30:28,036 INFO L482 AbstractCegarLoop]: Abstraction has 24902 states and 64511 transitions. [2021-06-12 19:30:28,036 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) [2021-06-12 19:30:28,036 INFO L276 IsEmpty]: Start isEmpty. Operand 24902 states and 64511 transitions. [2021-06-12 19:30:28,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-12 19:30:28,053 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:30:28,053 INFO L472 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:30:28,253 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1407,653 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:30:28,253 INFO L430 AbstractCegarLoop]: === Iteration 662 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:30:28,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:30:28,254 INFO L82 PathProgramCache]: Analyzing trace with hash -1435521679, now seen corresponding path program 406 times [2021-06-12 19:30:28,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:30:28,254 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674058598] [2021-06-12 19:30:28,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:30:28,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:30:28,361 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 53 proven. 173 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:30:28,362 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:30:28,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674058598] [2021-06-12 19:30:28,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674058598] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:30:28,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546408684] [2021-06-12 19:30:28,362 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 [2021-06-12 19:30:28,391 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:30:28,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:30:28,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:30:28,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:30:28,487 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 53 proven. 173 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:30:28,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [546408684] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:30:28,488 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:30:28,488 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-06-12 19:30:28,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973850532] [2021-06-12 19:30:28,488 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:30:28,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:30:28,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:30:28,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:30:28,488 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) [2021-06-12 19:30:28,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:30:28,812 INFO L93 Difference]: Finished difference Result 30490 states and 74400 transitions. [2021-06-12 19:30:28,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 19:30:28,812 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 [2021-06-12 19:30:28,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:30:28,856 INFO L225 Difference]: With dead ends: 30490 [2021-06-12 19:30:28,857 INFO L226 Difference]: Without dead ends: 30448 [2021-06-12 19:30:28,857 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 137.2ms TimeCoverageRelationStatistics Valid=139, Invalid=281, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:30:28,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30448 states. [2021-06-12 19:30:29,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30448 to 24902. [2021-06-12 19:30:29,441 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) [2021-06-12 19:30:29,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24902 states to 24902 states and 64502 transitions. [2021-06-12 19:30:29,500 INFO L78 Accepts]: Start accepts. Automaton has 24902 states and 64502 transitions. Word has length 65 [2021-06-12 19:30:29,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:30:29,501 INFO L482 AbstractCegarLoop]: Abstraction has 24902 states and 64502 transitions. [2021-06-12 19:30:29,501 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) [2021-06-12 19:30:29,501 INFO L276 IsEmpty]: Start isEmpty. Operand 24902 states and 64502 transitions. [2021-06-12 19:30:29,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-12 19:30:29,516 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:30:29,516 INFO L472 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:30:29,717 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1408,654 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:30:29,717 INFO L430 AbstractCegarLoop]: === Iteration 663 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:30:29,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:30:29,717 INFO L82 PathProgramCache]: Analyzing trace with hash 812558882, now seen corresponding path program 407 times [2021-06-12 19:30:29,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:30:29,717 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596951748] [2021-06-12 19:30:29,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:30:29,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:30:29,861 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 19 proven. 204 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:30:29,861 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:30:29,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596951748] [2021-06-12 19:30:29,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596951748] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:30:29,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061575705] [2021-06-12 19:30:29,862 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 [2021-06-12 19:30:29,897 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2021-06-12 19:30:29,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:30:29,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-12 19:30:29,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:30:30,141 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 18 proven. 205 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:30:30,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061575705] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:30:30,141 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:30:30,141 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-06-12 19:30:30,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298010074] [2021-06-12 19:30:30,141 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:30:30,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:30:30,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:30:30,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:30:30,142 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) [2021-06-12 19:30:33,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:30:33,708 INFO L93 Difference]: Finished difference Result 69310 states and 163134 transitions. [2021-06-12 19:30:33,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 163 states. [2021-06-12 19:30:33,709 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 [2021-06-12 19:30:33,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:30:33,801 INFO L225 Difference]: With dead ends: 69310 [2021-06-12 19:30:33,801 INFO L226 Difference]: Without dead ends: 67924 [2021-06-12 19:30:33,802 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 67 SyntacticMatches, 2 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10744 ImplicationChecksByTransitivity, 2534.9ms TimeCoverageRelationStatistics Valid=1953, Invalid=24453, Unknown=0, NotChecked=0, Total=26406 [2021-06-12 19:30:33,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67924 states. [2021-06-12 19:30:34,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67924 to 27517. [2021-06-12 19:30:34,499 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) [2021-06-12 19:30:34,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27517 states to 27517 states and 71255 transitions. [2021-06-12 19:30:34,544 INFO L78 Accepts]: Start accepts. Automaton has 27517 states and 71255 transitions. Word has length 65 [2021-06-12 19:30:34,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:30:34,544 INFO L482 AbstractCegarLoop]: Abstraction has 27517 states and 71255 transitions. [2021-06-12 19:30:34,544 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) [2021-06-12 19:30:34,544 INFO L276 IsEmpty]: Start isEmpty. Operand 27517 states and 71255 transitions. [2021-06-12 19:30:34,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-12 19:30:34,560 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:30:34,560 INFO L472 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:30:34,761 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1414,655 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:30:34,761 INFO L430 AbstractCegarLoop]: === Iteration 664 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:30:34,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:30:34,761 INFO L82 PathProgramCache]: Analyzing trace with hash 1561976535, now seen corresponding path program 408 times [2021-06-12 19:30:34,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:30:34,761 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587958045] [2021-06-12 19:30:34,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:30:34,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:30:35,022 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 57 proven. 169 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:30:35,022 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:30:35,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587958045] [2021-06-12 19:30:35,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587958045] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:30:35,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413956860] [2021-06-12 19:30:35,023 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 [2021-06-12 19:30:35,057 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-06-12 19:30:35,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:30:35,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:30:35,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:30:35,154 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 57 proven. 169 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:30:35,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413956860] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:30:35,154 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:30:35,154 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2021-06-12 19:30:35,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484237956] [2021-06-12 19:30:35,155 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:30:35,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:30:35,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:30:35,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:30:35,155 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) [2021-06-12 19:30:35,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:30:35,497 INFO L93 Difference]: Finished difference Result 33599 states and 82086 transitions. [2021-06-12 19:30:35,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-12 19:30:35,497 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 [2021-06-12 19:30:35,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:30:35,542 INFO L225 Difference]: With dead ends: 33599 [2021-06-12 19:30:35,542 INFO L226 Difference]: Without dead ends: 33548 [2021-06-12 19:30:35,542 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 302.0ms TimeCoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:30:35,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33548 states. [2021-06-12 19:30:36,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33548 to 27517. [2021-06-12 19:30:36,036 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) [2021-06-12 19:30:36,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27517 states to 27517 states and 71246 transitions. [2021-06-12 19:30:36,087 INFO L78 Accepts]: Start accepts. Automaton has 27517 states and 71246 transitions. Word has length 65 [2021-06-12 19:30:36,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:30:36,087 INFO L482 AbstractCegarLoop]: Abstraction has 27517 states and 71246 transitions. [2021-06-12 19:30:36,087 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) [2021-06-12 19:30:36,087 INFO L276 IsEmpty]: Start isEmpty. Operand 27517 states and 71246 transitions. [2021-06-12 19:30:36,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-12 19:30:36,104 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:30:36,104 INFO L472 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:30:36,304 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 656 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1415 [2021-06-12 19:30:36,304 INFO L430 AbstractCegarLoop]: === Iteration 665 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:30:36,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:30:36,304 INFO L82 PathProgramCache]: Analyzing trace with hash -1010587476, now seen corresponding path program 409 times [2021-06-12 19:30:36,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:30:36,304 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770195229] [2021-06-12 19:30:36,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:30:36,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:30:36,461 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 19 proven. 204 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:30:36,462 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:30:36,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770195229] [2021-06-12 19:30:36,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770195229] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:30:36,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103405023] [2021-06-12 19:30:36,462 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 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 [2021-06-12 19:30:36,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:30:36,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-12 19:30:36,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:30:36,585 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 18 proven. 205 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:30:36,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1103405023] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:30:36,585 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:30:36,585 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 17 [2021-06-12 19:30:36,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153062249] [2021-06-12 19:30:36,585 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:30:36,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:30:36,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:30:36,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=271, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:30:36,585 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) [2021-06-12 19:30:42,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:30:42,310 INFO L93 Difference]: Finished difference Result 88601 states and 209190 transitions. [2021-06-12 19:30:42,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 259 states. [2021-06-12 19:30:42,310 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 [2021-06-12 19:30:42,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:30:42,443 INFO L225 Difference]: With dead ends: 88601 [2021-06-12 19:30:42,443 INFO L226 Difference]: Without dead ends: 87281 [2021-06-12 19:30:42,445 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 66 SyntacticMatches, 2 SemanticMatches, 257 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29314 ImplicationChecksByTransitivity, 4321.2ms TimeCoverageRelationStatistics Valid=4383, Invalid=62439, Unknown=0, NotChecked=0, Total=66822 [2021-06-12 19:30:42,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87281 states. [2021-06-12 19:30:43,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87281 to 29787. [2021-06-12 19:30:43,420 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) [2021-06-12 19:30:43,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29787 states to 29787 states and 77039 transitions. [2021-06-12 19:30:43,473 INFO L78 Accepts]: Start accepts. Automaton has 29787 states and 77039 transitions. Word has length 65 [2021-06-12 19:30:43,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:30:43,474 INFO L482 AbstractCegarLoop]: Abstraction has 29787 states and 77039 transitions. [2021-06-12 19:30:43,474 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) [2021-06-12 19:30:43,474 INFO L276 IsEmpty]: Start isEmpty. Operand 29787 states and 77039 transitions. [2021-06-12 19:30:43,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-12 19:30:43,491 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:30:43,491 INFO L472 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:30:43,691 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 657 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1422 [2021-06-12 19:30:43,691 INFO L430 AbstractCegarLoop]: === Iteration 666 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:30:43,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:30:43,692 INFO L82 PathProgramCache]: Analyzing trace with hash -928748623, now seen corresponding path program 410 times [2021-06-12 19:30:43,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:30:43,692 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301511224] [2021-06-12 19:30:43,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:30:43,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:30:43,826 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 67 proven. 159 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:30:43,826 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:30:43,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301511224] [2021-06-12 19:30:43,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301511224] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:30:43,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746475740] [2021-06-12 19:30:43,826 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 [2021-06-12 19:30:43,855 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:30:43,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:30:43,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:30:43,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:30:43,953 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 67 proven. 159 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:30:43,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1746475740] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:30:43,954 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:30:43,954 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2021-06-12 19:30:43,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145327591] [2021-06-12 19:30:43,954 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:30:43,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:30:43,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:30:43,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:30:43,954 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) [2021-06-12 19:30:44,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:30:44,446 INFO L93 Difference]: Finished difference Result 36048 states and 88237 transitions. [2021-06-12 19:30:44,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-12 19:30:44,446 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 [2021-06-12 19:30:44,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:30:44,495 INFO L225 Difference]: With dead ends: 36048 [2021-06-12 19:30:44,495 INFO L226 Difference]: Without dead ends: 35988 [2021-06-12 19:30:44,495 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 191.4ms TimeCoverageRelationStatistics Valid=187, Invalid=413, Unknown=0, NotChecked=0, Total=600 [2021-06-12 19:30:44,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35988 states. [2021-06-12 19:30:45,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35988 to 29354. [2021-06-12 19:30:45,076 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) [2021-06-12 19:30:45,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29354 states to 29354 states and 75841 transitions. [2021-06-12 19:30:45,126 INFO L78 Accepts]: Start accepts. Automaton has 29354 states and 75841 transitions. Word has length 65 [2021-06-12 19:30:45,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:30:45,126 INFO L482 AbstractCegarLoop]: Abstraction has 29354 states and 75841 transitions. [2021-06-12 19:30:45,126 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) [2021-06-12 19:30:45,126 INFO L276 IsEmpty]: Start isEmpty. Operand 29354 states and 75841 transitions. [2021-06-12 19:30:45,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-12 19:30:45,141 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:30:45,141 INFO L472 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:30:45,341 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 658 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1423 [2021-06-12 19:30:45,342 INFO L430 AbstractCegarLoop]: === Iteration 667 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:30:45,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:30:45,342 INFO L82 PathProgramCache]: Analyzing trace with hash -207313438, now seen corresponding path program 411 times [2021-06-12 19:30:45,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:30:45,342 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826014981] [2021-06-12 19:30:45,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:30:45,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:30:45,509 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 18 proven. 207 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:30:45,510 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:30:45,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826014981] [2021-06-12 19:30:45,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [826014981] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:30:45,510 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366201183] [2021-06-12 19:30:45,510 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 [2021-06-12 19:30:45,546 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2021-06-12 19:30:45,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:30:45,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-12 19:30:45,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:30:45,638 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 18 proven. 207 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:30:45,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1366201183] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:30:45,639 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:30:45,639 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 18 [2021-06-12 19:30:45,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930531610] [2021-06-12 19:30:45,639 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:30:45,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:30:45,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:30:45,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=305, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:30:45,639 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) [2021-06-12 19:30:46,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:30:46,946 INFO L93 Difference]: Finished difference Result 42805 states and 102748 transitions. [2021-06-12 19:30:46,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-12 19:30:46,946 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 [2021-06-12 19:30:46,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:30:46,996 INFO L225 Difference]: With dead ends: 42805 [2021-06-12 19:30:46,996 INFO L226 Difference]: Without dead ends: 41023 [2021-06-12 19:30:46,996 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 65 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 557.2ms TimeCoverageRelationStatistics Valid=230, Invalid=1330, Unknown=0, NotChecked=0, Total=1560 [2021-06-12 19:30:47,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41023 states. [2021-06-12 19:30:47,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41023 to 21413. [2021-06-12 19:30:47,413 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) [2021-06-12 19:30:47,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21413 states to 21413 states and 55207 transitions. [2021-06-12 19:30:47,450 INFO L78 Accepts]: Start accepts. Automaton has 21413 states and 55207 transitions. Word has length 65 [2021-06-12 19:30:47,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:30:47,450 INFO L482 AbstractCegarLoop]: Abstraction has 21413 states and 55207 transitions. [2021-06-12 19:30:47,450 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) [2021-06-12 19:30:47,450 INFO L276 IsEmpty]: Start isEmpty. Operand 21413 states and 55207 transitions. [2021-06-12 19:30:47,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-12 19:30:47,466 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:30:47,466 INFO L472 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:30:47,666 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 659 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1431 [2021-06-12 19:30:47,666 INFO L430 AbstractCegarLoop]: === Iteration 668 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:30:47,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:30:47,667 INFO L82 PathProgramCache]: Analyzing trace with hash -1067255365, now seen corresponding path program 198 times [2021-06-12 19:30:47,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:30:47,667 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684275255] [2021-06-12 19:30:47,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:30:47,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:30:47,748 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 170 proven. 56 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:30:47,748 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:30:47,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684275255] [2021-06-12 19:30:47,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684275255] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:30:47,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014649074] [2021-06-12 19:30:47,748 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 [2021-06-12 19:30:47,785 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2021-06-12 19:30:47,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:30:47,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:30:47,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:30:47,888 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 171 proven. 56 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:30:47,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1014649074] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:30:47,888 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:30:47,888 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 13 [2021-06-12 19:30:47,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045841504] [2021-06-12 19:30:47,889 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:30:47,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:30:47,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:30:47,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=104, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:30:47,889 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) [2021-06-12 19:30:48,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:30:48,304 INFO L93 Difference]: Finished difference Result 31342 states and 77017 transitions. [2021-06-12 19:30:48,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 19:30:48,305 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 [2021-06-12 19:30:48,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:30:48,479 INFO L225 Difference]: With dead ends: 31342 [2021-06-12 19:30:48,479 INFO L226 Difference]: Without dead ends: 31342 [2021-06-12 19:30:48,479 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 130.8ms TimeCoverageRelationStatistics Valid=176, Invalid=244, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:30:48,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31342 states. [2021-06-12 19:30:48,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31342 to 21689. [2021-06-12 19:30:48,782 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) [2021-06-12 19:30:48,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21689 states to 21689 states and 56038 transitions. [2021-06-12 19:30:48,818 INFO L78 Accepts]: Start accepts. Automaton has 21689 states and 56038 transitions. Word has length 65 [2021-06-12 19:30:48,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:30:48,819 INFO L482 AbstractCegarLoop]: Abstraction has 21689 states and 56038 transitions. [2021-06-12 19:30:48,819 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) [2021-06-12 19:30:48,819 INFO L276 IsEmpty]: Start isEmpty. Operand 21689 states and 56038 transitions. [2021-06-12 19:30:48,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-12 19:30:48,951 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:30:48,951 INFO L472 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:30:49,151 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 660 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1432 [2021-06-12 19:30:49,152 INFO L430 AbstractCegarLoop]: === Iteration 669 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:30:49,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:30:49,152 INFO L82 PathProgramCache]: Analyzing trace with hash 1590139475, now seen corresponding path program 199 times [2021-06-12 19:30:49,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:30:49,152 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406408762] [2021-06-12 19:30:49,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:30:49,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:30:49,251 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 169 proven. 57 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:30:49,251 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:30:49,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406408762] [2021-06-12 19:30:49,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406408762] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:30:49,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537746155] [2021-06-12 19:30:49,252 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 [2021-06-12 19:30:49,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:30:49,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:30:49,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:30:49,396 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 170 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:30:49,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1537746155] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:30:49,396 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:30:49,397 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 14 [2021-06-12 19:30:49,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665224904] [2021-06-12 19:30:49,397 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:30:49,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:30:49,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:30:49,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=129, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:30:49,397 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) [2021-06-12 19:30:49,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:30:49,912 INFO L93 Difference]: Finished difference Result 35356 states and 86322 transitions. [2021-06-12 19:30:49,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-12 19:30:49,912 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 [2021-06-12 19:30:49,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:30:49,962 INFO L225 Difference]: With dead ends: 35356 [2021-06-12 19:30:49,962 INFO L226 Difference]: Without dead ends: 35356 [2021-06-12 19:30:49,963 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 215.3ms TimeCoverageRelationStatistics Valid=296, Invalid=460, Unknown=0, NotChecked=0, Total=756 [2021-06-12 19:30:50,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35356 states. [2021-06-12 19:30:50,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35356 to 21737. [2021-06-12 19:30:50,378 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) [2021-06-12 19:30:50,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21737 states to 21737 states and 56179 transitions. [2021-06-12 19:30:50,413 INFO L78 Accepts]: Start accepts. Automaton has 21737 states and 56179 transitions. Word has length 65 [2021-06-12 19:30:50,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:30:50,413 INFO L482 AbstractCegarLoop]: Abstraction has 21737 states and 56179 transitions. [2021-06-12 19:30:50,413 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) [2021-06-12 19:30:50,413 INFO L276 IsEmpty]: Start isEmpty. Operand 21737 states and 56179 transitions. [2021-06-12 19:30:50,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-12 19:30:50,428 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:30:50,428 INFO L472 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:30:50,628 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1433,661 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:30:50,629 INFO L430 AbstractCegarLoop]: === Iteration 670 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:30:50,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:30:50,629 INFO L82 PathProgramCache]: Analyzing trace with hash -99855689, now seen corresponding path program 200 times [2021-06-12 19:30:50,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:30:50,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191247880] [2021-06-12 19:30:50,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:30:50,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:30:50,729 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 162 proven. 64 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:30:50,730 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:30:50,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191247880] [2021-06-12 19:30:50,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191247880] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:30:50,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195711728] [2021-06-12 19:30:50,730 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 [2021-06-12 19:30:50,759 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:30:50,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:30:50,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:30:50,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:30:50,912 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 163 proven. 64 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:30:50,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1195711728] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:30:50,913 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:30:50,913 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 15 [2021-06-12 19:30:50,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901443209] [2021-06-12 19:30:50,913 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:30:50,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:30:50,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:30:50,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:30:50,913 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) [2021-06-12 19:30:51,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:30:51,508 INFO L93 Difference]: Finished difference Result 37231 states and 90722 transitions. [2021-06-12 19:30:51,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-12 19:30:51,508 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 [2021-06-12 19:30:51,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:30:51,557 INFO L225 Difference]: With dead ends: 37231 [2021-06-12 19:30:51,557 INFO L226 Difference]: Without dead ends: 37231 [2021-06-12 19:30:51,557 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 250.0ms TimeCoverageRelationStatistics Valid=403, Invalid=653, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 19:30:51,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37231 states. [2021-06-12 19:30:51,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37231 to 21806. [2021-06-12 19:30:51,970 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) [2021-06-12 19:30:52,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21806 states to 21806 states and 56383 transitions. [2021-06-12 19:30:52,008 INFO L78 Accepts]: Start accepts. Automaton has 21806 states and 56383 transitions. Word has length 65 [2021-06-12 19:30:52,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:30:52,009 INFO L482 AbstractCegarLoop]: Abstraction has 21806 states and 56383 transitions. [2021-06-12 19:30:52,009 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) [2021-06-12 19:30:52,009 INFO L276 IsEmpty]: Start isEmpty. Operand 21806 states and 56383 transitions. [2021-06-12 19:30:52,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-12 19:30:52,025 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:30:52,025 INFO L472 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:30:52,225 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 662 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1434 [2021-06-12 19:30:52,225 INFO L430 AbstractCegarLoop]: === Iteration 671 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:30:52,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:30:52,225 INFO L82 PathProgramCache]: Analyzing trace with hash -1139142701, now seen corresponding path program 201 times [2021-06-12 19:30:52,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:30:52,226 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816228451] [2021-06-12 19:30:52,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:30:52,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:30:52,340 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 155 proven. 71 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:30:52,340 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:30:52,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816228451] [2021-06-12 19:30:52,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1816228451] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:30:52,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113045959] [2021-06-12 19:30:52,340 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 [2021-06-12 19:30:52,377 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2021-06-12 19:30:52,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:30:52,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:30:52,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:30:52,481 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 156 proven. 71 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:30:52,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113045959] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:30:52,481 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:30:52,481 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 16 [2021-06-12 19:30:52,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970017330] [2021-06-12 19:30:52,481 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:30:52,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:30:52,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:30:52,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:30:52,481 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) [2021-06-12 19:30:53,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:30:53,167 INFO L93 Difference]: Finished difference Result 37033 states and 90316 transitions. [2021-06-12 19:30:53,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-12 19:30:53,168 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 [2021-06-12 19:30:53,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:30:53,212 INFO L225 Difference]: With dead ends: 37033 [2021-06-12 19:30:53,212 INFO L226 Difference]: Without dead ends: 37033 [2021-06-12 19:30:53,212 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 293.7ms TimeCoverageRelationStatistics Valid=478, Invalid=782, Unknown=0, NotChecked=0, Total=1260 [2021-06-12 19:30:53,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37033 states. [2021-06-12 19:30:53,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37033 to 21884. [2021-06-12 19:30:53,578 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) [2021-06-12 19:30:53,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21884 states to 21884 states and 56614 transitions. [2021-06-12 19:30:53,615 INFO L78 Accepts]: Start accepts. Automaton has 21884 states and 56614 transitions. Word has length 65 [2021-06-12 19:30:53,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:30:53,615 INFO L482 AbstractCegarLoop]: Abstraction has 21884 states and 56614 transitions. [2021-06-12 19:30:53,615 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) [2021-06-12 19:30:53,616 INFO L276 IsEmpty]: Start isEmpty. Operand 21884 states and 56614 transitions. [2021-06-12 19:30:53,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-12 19:30:53,631 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:30:53,631 INFO L472 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:30:53,831 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1435,663 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:30:53,831 INFO L430 AbstractCegarLoop]: === Iteration 672 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:30:53,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:30:53,831 INFO L82 PathProgramCache]: Analyzing trace with hash -119280329, now seen corresponding path program 202 times [2021-06-12 19:30:53,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:30:53,831 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603673568] [2021-06-12 19:30:53,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:30:53,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:30:54,046 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 148 proven. 78 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:30:54,046 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:30:54,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603673568] [2021-06-12 19:30:54,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603673568] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:30:54,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560239498] [2021-06-12 19:30:54,047 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 [2021-06-12 19:30:54,075 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:30:54,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:30:54,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:30:54,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:30:54,177 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 149 proven. 78 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:30:54,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1560239498] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:30:54,177 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:30:54,177 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 17 [2021-06-12 19:30:54,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990580267] [2021-06-12 19:30:54,177 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:30:54,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:30:54,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:30:54,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:30:54,177 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) [2021-06-12 19:30:54,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:30:54,843 INFO L93 Difference]: Finished difference Result 34831 states and 85232 transitions. [2021-06-12 19:30:54,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-12 19:30:54,844 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 [2021-06-12 19:30:54,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:30:54,888 INFO L225 Difference]: With dead ends: 34831 [2021-06-12 19:30:54,888 INFO L226 Difference]: Without dead ends: 34831 [2021-06-12 19:30:54,889 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 398.2ms TimeCoverageRelationStatistics Valid=503, Invalid=829, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 19:30:54,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34831 states. [2021-06-12 19:30:55,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34831 to 21919. [2021-06-12 19:30:55,340 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) [2021-06-12 19:30:55,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21919 states to 21919 states and 56722 transitions. [2021-06-12 19:30:55,381 INFO L78 Accepts]: Start accepts. Automaton has 21919 states and 56722 transitions. Word has length 65 [2021-06-12 19:30:55,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:30:55,382 INFO L482 AbstractCegarLoop]: Abstraction has 21919 states and 56722 transitions. [2021-06-12 19:30:55,382 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.8333333333333335) internal successors, (69), 17 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-12 19:30:55,382 INFO L276 IsEmpty]: Start isEmpty. Operand 21919 states and 56722 transitions. [2021-06-12 19:30:55,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-12 19:30:55,398 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:30:55,398 INFO L472 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:30:55,599 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 664 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1436 [2021-06-12 19:30:55,599 INFO L430 AbstractCegarLoop]: === Iteration 673 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:30:55,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:30:55,599 INFO L82 PathProgramCache]: Analyzing trace with hash 1992019, now seen corresponding path program 203 times [2021-06-12 19:30:55,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:30:55,599 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267520137] [2021-06-12 19:30:55,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:30:55,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:30:55,756 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 141 proven. 85 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:30:55,756 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:30:55,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267520137] [2021-06-12 19:30:55,757 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267520137] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:30:55,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871639453] [2021-06-12 19:30:55,757 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 [2021-06-12 19:30:55,796 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2021-06-12 19:30:55,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:30:55,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:30:55,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:30:56,149 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 142 proven. 85 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:30:56,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [871639453] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:30:56,149 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:30:56,149 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 20] total 36 [2021-06-12 19:30:56,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93096488] [2021-06-12 19:30:56,149 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-12 19:30:56,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:30:56,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-12 19:30:56,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=320, Invalid=1012, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 19:30:56,150 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) [2021-06-12 19:30:57,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:30:57,320 INFO L93 Difference]: Finished difference Result 31459 states and 77242 transitions. [2021-06-12 19:30:57,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-12 19:30:57,320 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 [2021-06-12 19:30:57,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:30:57,358 INFO L225 Difference]: With dead ends: 31459 [2021-06-12 19:30:57,359 INFO L226 Difference]: Without dead ends: 31459 [2021-06-12 19:30:57,359 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 894 ImplicationChecksByTransitivity, 695.0ms TimeCoverageRelationStatistics Valid=1021, Invalid=2285, Unknown=0, NotChecked=0, Total=3306 [2021-06-12 19:30:57,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31459 states. [2021-06-12 19:30:57,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31459 to 21939. [2021-06-12 19:30:57,706 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) [2021-06-12 19:30:57,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21939 states to 21939 states and 56789 transitions. [2021-06-12 19:30:57,742 INFO L78 Accepts]: Start accepts. Automaton has 21939 states and 56789 transitions. Word has length 65 [2021-06-12 19:30:57,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:30:57,742 INFO L482 AbstractCegarLoop]: Abstraction has 21939 states and 56789 transitions. [2021-06-12 19:30:57,742 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) [2021-06-12 19:30:57,742 INFO L276 IsEmpty]: Start isEmpty. Operand 21939 states and 56789 transitions. [2021-06-12 19:30:57,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-12 19:30:57,758 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:30:57,758 INFO L472 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:30:57,958 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1437,665 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:30:57,958 INFO L430 AbstractCegarLoop]: === Iteration 674 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:30:57,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:30:57,958 INFO L82 PathProgramCache]: Analyzing trace with hash 759015351, now seen corresponding path program 204 times [2021-06-12 19:30:57,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:30:57,958 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951143424] [2021-06-12 19:30:57,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:30:57,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:30:58,205 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 134 proven. 93 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:30:58,205 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:30:58,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951143424] [2021-06-12 19:30:58,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951143424] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:30:58,205 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101678872] [2021-06-12 19:30:58,205 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 [2021-06-12 19:30:58,242 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2021-06-12 19:30:58,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:30:58,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:30:58,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:30:58,348 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 135 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-12 19:30:58,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [101678872] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:30:58,348 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:30:58,348 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 19 [2021-06-12 19:30:58,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649600427] [2021-06-12 19:30:58,348 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-12 19:30:58,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:30:58,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-12 19:30:58,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=269, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:30:58,348 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) [2021-06-12 19:30:58,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:30:58,918 INFO L93 Difference]: Finished difference Result 26303 states and 65783 transitions. [2021-06-12 19:30:58,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-12 19:30:58,918 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 [2021-06-12 19:30:58,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:30:58,954 INFO L225 Difference]: With dead ends: 26303 [2021-06-12 19:30:58,954 INFO L226 Difference]: Without dead ends: 26303 [2021-06-12 19:30:58,955 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 65 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 383.3ms TimeCoverageRelationStatistics Valid=371, Invalid=685, Unknown=0, NotChecked=0, Total=1056 [2021-06-12 19:30:58,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26303 states. [2021-06-12 19:30:59,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26303 to 21121. [2021-06-12 19:30:59,253 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) [2021-06-12 19:30:59,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21121 states to 21121 states and 54587 transitions. [2021-06-12 19:30:59,288 INFO L78 Accepts]: Start accepts. Automaton has 21121 states and 54587 transitions. Word has length 65 [2021-06-12 19:30:59,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:30:59,288 INFO L482 AbstractCegarLoop]: Abstraction has 21121 states and 54587 transitions. [2021-06-12 19:30:59,288 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) [2021-06-12 19:30:59,288 INFO L276 IsEmpty]: Start isEmpty. Operand 21121 states and 54587 transitions. [2021-06-12 19:30:59,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-12 19:30:59,304 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:30:59,304 INFO L472 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:30:59,504 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 666 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1438 [2021-06-12 19:30:59,504 INFO L430 AbstractCegarLoop]: === Iteration 675 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:30:59,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:30:59,505 INFO L82 PathProgramCache]: Analyzing trace with hash 2028042391, now seen corresponding path program 412 times [2021-06-12 19:30:59,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:30:59,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226993325] [2021-06-12 19:30:59,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:30:59,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:30:59,741 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 84 proven. 143 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:30:59,742 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:30:59,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226993325] [2021-06-12 19:30:59,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226993325] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:30:59,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267506931] [2021-06-12 19:30:59,742 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 [2021-06-12 19:30:59,771 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:30:59,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:30:59,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:30:59,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:30:59,868 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 84 proven. 143 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:30:59,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1267506931] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:30:59,868 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:30:59,868 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2021-06-12 19:30:59,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086520360] [2021-06-12 19:30:59,868 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:30:59,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:30:59,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:30:59,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:30:59,868 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) [2021-06-12 19:31:00,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:31:00,290 INFO L93 Difference]: Finished difference Result 25725 states and 62650 transitions. [2021-06-12 19:31:00,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 19:31:00,290 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 [2021-06-12 19:31:00,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:31:00,324 INFO L225 Difference]: With dead ends: 25725 [2021-06-12 19:31:00,324 INFO L226 Difference]: Without dead ends: 25662 [2021-06-12 19:31:00,324 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 300.5ms TimeCoverageRelationStatistics Valid=214, Invalid=488, Unknown=0, NotChecked=0, Total=702 [2021-06-12 19:31:00,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25662 states. [2021-06-12 19:31:00,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25662 to 21121. [2021-06-12 19:31:00,623 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) [2021-06-12 19:31:00,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21121 states to 21121 states and 54578 transitions. [2021-06-12 19:31:00,656 INFO L78 Accepts]: Start accepts. Automaton has 21121 states and 54578 transitions. Word has length 65 [2021-06-12 19:31:00,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:31:00,656 INFO L482 AbstractCegarLoop]: Abstraction has 21121 states and 54578 transitions. [2021-06-12 19:31:00,656 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) [2021-06-12 19:31:00,656 INFO L276 IsEmpty]: Start isEmpty. Operand 21121 states and 54578 transitions. [2021-06-12 19:31:00,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-12 19:31:00,674 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:31:00,674 INFO L472 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:31:00,880 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1439,667 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:31:00,881 INFO L430 AbstractCegarLoop]: === Iteration 676 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:31:00,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:31:00,881 INFO L82 PathProgramCache]: Analyzing trace with hash 407999270, now seen corresponding path program 205 times [2021-06-12 19:31:00,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:31:00,881 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508457854] [2021-06-12 19:31:00,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:31:00,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:31:00,990 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 10 proven. 213 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:31:00,990 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:31:00,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508457854] [2021-06-12 19:31:00,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508457854] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:31:00,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230523195] [2021-06-12 19:31:00,990 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 [2021-06-12 19:31:01,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:31:01,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-12 19:31:01,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:31:01,115 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 9 proven. 214 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:31:01,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1230523195] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:31:01,116 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:31:01,116 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-12 19:31:01,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925723190] [2021-06-12 19:31:01,116 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:31:01,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:31:01,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:31:01,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:31:01,116 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) [2021-06-12 19:31:01,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:31:01,898 INFO L93 Difference]: Finished difference Result 23217 states and 58673 transitions. [2021-06-12 19:31:01,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 19:31:01,899 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 [2021-06-12 19:31:01,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:31:01,924 INFO L225 Difference]: With dead ends: 23217 [2021-06-12 19:31:01,924 INFO L226 Difference]: Without dead ends: 23202 [2021-06-12 19:31:01,924 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 70 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 174.5ms TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:31:01,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23202 states. [2021-06-12 19:31:02,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23202 to 21457. [2021-06-12 19:31:02,189 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) [2021-06-12 19:31:02,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21457 states to 21457 states and 55372 transitions. [2021-06-12 19:31:02,224 INFO L78 Accepts]: Start accepts. Automaton has 21457 states and 55372 transitions. Word has length 65 [2021-06-12 19:31:02,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:31:02,224 INFO L482 AbstractCegarLoop]: Abstraction has 21457 states and 55372 transitions. [2021-06-12 19:31:02,224 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) [2021-06-12 19:31:02,224 INFO L276 IsEmpty]: Start isEmpty. Operand 21457 states and 55372 transitions. [2021-06-12 19:31:02,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-12 19:31:02,239 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:31:02,239 INFO L472 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:31:02,439 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1448,668 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:31:02,439 INFO L430 AbstractCegarLoop]: === Iteration 677 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:31:02,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:31:02,440 INFO L82 PathProgramCache]: Analyzing trace with hash 1908332262, now seen corresponding path program 413 times [2021-06-12 19:31:02,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:31:02,440 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308288972] [2021-06-12 19:31:02,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:31:02,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:31:02,561 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 22 proven. 201 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:31:02,561 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:31:02,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308288972] [2021-06-12 19:31:02,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308288972] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:31:02,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233654175] [2021-06-12 19:31:02,561 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 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 [2021-06-12 19:31:02,605 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-06-12 19:31:02,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:31:02,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-12 19:31:02,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:31:02,731 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 17 proven. 206 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:31:02,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [233654175] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:31:02,731 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:31:02,731 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-06-12 19:31:02,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873069943] [2021-06-12 19:31:02,731 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:31:02,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:31:02,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:31:02,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:31:02,732 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) [2021-06-12 19:31:03,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:31:03,748 INFO L93 Difference]: Finished difference Result 22759 states and 57640 transitions. [2021-06-12 19:31:03,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 19:31:03,748 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 [2021-06-12 19:31:03,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:31:03,774 INFO L225 Difference]: With dead ends: 22759 [2021-06-12 19:31:03,774 INFO L226 Difference]: Without dead ends: 22613 [2021-06-12 19:31:03,774 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 70 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 197.8ms TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:31:03,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22613 states. [2021-06-12 19:31:04,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22613 to 21545. [2021-06-12 19:31:04,066 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) [2021-06-12 19:31:04,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21545 states to 21545 states and 55413 transitions. [2021-06-12 19:31:04,100 INFO L78 Accepts]: Start accepts. Automaton has 21545 states and 55413 transitions. Word has length 65 [2021-06-12 19:31:04,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:31:04,100 INFO L482 AbstractCegarLoop]: Abstraction has 21545 states and 55413 transitions. [2021-06-12 19:31:04,100 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) [2021-06-12 19:31:04,100 INFO L276 IsEmpty]: Start isEmpty. Operand 21545 states and 55413 transitions. [2021-06-12 19:31:04,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-12 19:31:04,115 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:31:04,115 INFO L472 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:31:04,315 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 669 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1449 [2021-06-12 19:31:04,315 INFO L430 AbstractCegarLoop]: === Iteration 678 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:31:04,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:31:04,316 INFO L82 PathProgramCache]: Analyzing trace with hash 1294796082, now seen corresponding path program 414 times [2021-06-12 19:31:04,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:31:04,316 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388889745] [2021-06-12 19:31:04,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:31:04,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:31:04,422 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 19 proven. 202 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-12 19:31:04,422 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:31:04,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388889745] [2021-06-12 19:31:04,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388889745] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:31:04,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176464689] [2021-06-12 19:31:04,422 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 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 [2021-06-12 19:31:04,456 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2021-06-12 19:31:04,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:31:04,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-12 19:31:04,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:31:04,550 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 18 proven. 203 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-12 19:31:04,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1176464689] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:31:04,550 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:31:04,550 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-06-12 19:31:04,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457548070] [2021-06-12 19:31:04,550 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:31:04,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:31:04,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:31:04,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:31:04,551 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) [2021-06-12 19:31:05,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:31:05,264 INFO L93 Difference]: Finished difference Result 23561 states and 59381 transitions. [2021-06-12 19:31:05,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-12 19:31:05,265 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 [2021-06-12 19:31:05,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:31:05,290 INFO L225 Difference]: With dead ends: 23561 [2021-06-12 19:31:05,291 INFO L226 Difference]: Without dead ends: 23549 [2021-06-12 19:31:05,291 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 70 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 174.4ms TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-06-12 19:31:05,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23549 states. [2021-06-12 19:31:05,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23549 to 21713. [2021-06-12 19:31:05,624 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) [2021-06-12 19:31:05,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21713 states to 21713 states and 55843 transitions. [2021-06-12 19:31:05,662 INFO L78 Accepts]: Start accepts. Automaton has 21713 states and 55843 transitions. Word has length 65 [2021-06-12 19:31:05,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:31:05,662 INFO L482 AbstractCegarLoop]: Abstraction has 21713 states and 55843 transitions. [2021-06-12 19:31:05,662 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) [2021-06-12 19:31:05,662 INFO L276 IsEmpty]: Start isEmpty. Operand 21713 states and 55843 transitions. [2021-06-12 19:31:05,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-12 19:31:05,681 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:31:05,681 INFO L472 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:31:05,903 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1450,670 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:31:05,904 INFO L430 AbstractCegarLoop]: === Iteration 679 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:31:05,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:31:05,904 INFO L82 PathProgramCache]: Analyzing trace with hash -353561421, now seen corresponding path program 415 times [2021-06-12 19:31:05,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:31:05,904 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831721731] [2021-06-12 19:31:05,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:31:05,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:31:05,984 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 79 proven. 146 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:31:05,984 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:31:05,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831721731] [2021-06-12 19:31:05,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831721731] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:31:05,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302294621] [2021-06-12 19:31:05,984 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 [2021-06-12 19:31:06,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:31:06,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:31:06,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:31:06,106 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 79 proven. 146 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:31:06,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1302294621] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:31:06,106 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:31:06,106 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-06-12 19:31:06,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081601419] [2021-06-12 19:31:06,106 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-12 19:31:06,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:31:06,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-12 19:31:06,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-06-12 19:31:06,107 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) [2021-06-12 19:31:06,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:31:06,346 INFO L93 Difference]: Finished difference Result 26875 states and 64939 transitions. [2021-06-12 19:31:06,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:31:06,346 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 [2021-06-12 19:31:06,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:31:06,379 INFO L225 Difference]: With dead ends: 26875 [2021-06-12 19:31:06,379 INFO L226 Difference]: Without dead ends: 26857 [2021-06-12 19:31:06,379 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 88.4ms TimeCoverageRelationStatistics Valid=99, Invalid=141, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:31:06,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26857 states. [2021-06-12 19:31:06,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26857 to 21701. [2021-06-12 19:31:06,668 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) [2021-06-12 19:31:06,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21701 states to 21701 states and 55786 transitions. [2021-06-12 19:31:06,703 INFO L78 Accepts]: Start accepts. Automaton has 21701 states and 55786 transitions. Word has length 65 [2021-06-12 19:31:06,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:31:06,703 INFO L482 AbstractCegarLoop]: Abstraction has 21701 states and 55786 transitions. [2021-06-12 19:31:06,703 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) [2021-06-12 19:31:06,703 INFO L276 IsEmpty]: Start isEmpty. Operand 21701 states and 55786 transitions. [2021-06-12 19:31:06,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-12 19:31:06,719 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:31:06,719 INFO L472 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:31:06,919 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1451,671 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:31:06,920 INFO L430 AbstractCegarLoop]: === Iteration 680 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:31:06,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:31:06,920 INFO L82 PathProgramCache]: Analyzing trace with hash -858253880, now seen corresponding path program 416 times [2021-06-12 19:31:06,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:31:06,920 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720028323] [2021-06-12 19:31:06,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:31:06,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:31:07,029 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 19 proven. 204 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:31:07,029 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:31:07,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720028323] [2021-06-12 19:31:07,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720028323] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:31:07,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068285622] [2021-06-12 19:31:07,030 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 [2021-06-12 19:31:07,060 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:31:07,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:31:07,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-12 19:31:07,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:31:07,155 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 18 proven. 205 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:31:07,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2068285622] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:31:07,155 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:31:07,155 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-06-12 19:31:07,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266559194] [2021-06-12 19:31:07,155 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:31:07,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:31:07,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:31:07,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:31:07,156 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) [2021-06-12 19:31:08,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:31:08,207 INFO L93 Difference]: Finished difference Result 26110 states and 65034 transitions. [2021-06-12 19:31:08,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-12 19:31:08,207 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 [2021-06-12 19:31:08,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:31:08,238 INFO L225 Difference]: With dead ends: 26110 [2021-06-12 19:31:08,239 INFO L226 Difference]: Without dead ends: 26056 [2021-06-12 19:31:08,239 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 70 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 327.2ms TimeCoverageRelationStatistics Valid=147, Invalid=1185, Unknown=0, NotChecked=0, Total=1332 [2021-06-12 19:31:08,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26056 states. [2021-06-12 19:31:08,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26056 to 22216. [2021-06-12 19:31:08,522 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) [2021-06-12 19:31:08,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22216 states to 22216 states and 57192 transitions. [2021-06-12 19:31:08,557 INFO L78 Accepts]: Start accepts. Automaton has 22216 states and 57192 transitions. Word has length 65 [2021-06-12 19:31:08,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:31:08,557 INFO L482 AbstractCegarLoop]: Abstraction has 22216 states and 57192 transitions. [2021-06-12 19:31:08,557 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) [2021-06-12 19:31:08,557 INFO L276 IsEmpty]: Start isEmpty. Operand 22216 states and 57192 transitions. [2021-06-12 19:31:08,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-12 19:31:08,572 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:31:08,572 INFO L472 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:31:08,772 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 672 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1454 [2021-06-12 19:31:08,772 INFO L430 AbstractCegarLoop]: === Iteration 681 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:31:08,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:31:08,773 INFO L82 PathProgramCache]: Analyzing trace with hash 674305229, now seen corresponding path program 417 times [2021-06-12 19:31:08,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:31:08,773 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188637061] [2021-06-12 19:31:08,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:31:08,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:31:08,930 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 73 proven. 153 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:31:08,930 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:31:08,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188637061] [2021-06-12 19:31:08,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188637061] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:31:08,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288567459] [2021-06-12 19:31:08,931 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 [2021-06-12 19:31:08,975 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-06-12 19:31:08,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:31:08,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:31:08,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:31:09,073 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 73 proven. 153 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:31:09,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [288567459] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:31:09,073 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:31:09,073 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-06-12 19:31:09,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817275935] [2021-06-12 19:31:09,074 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-12 19:31:09,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:31:09,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-12 19:31:09,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-06-12 19:31:09,074 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) [2021-06-12 19:31:09,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:31:09,333 INFO L93 Difference]: Finished difference Result 27492 states and 66503 transitions. [2021-06-12 19:31:09,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-12 19:31:09,333 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 [2021-06-12 19:31:09,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:31:09,364 INFO L225 Difference]: With dead ends: 27492 [2021-06-12 19:31:09,364 INFO L226 Difference]: Without dead ends: 27468 [2021-06-12 19:31:09,364 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 154.1ms TimeCoverageRelationStatistics Valid=102, Invalid=170, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:31:09,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27468 states. [2021-06-12 19:31:09,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27468 to 22216. [2021-06-12 19:31:09,781 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) [2021-06-12 19:31:09,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22216 states to 22216 states and 57174 transitions. [2021-06-12 19:31:09,820 INFO L78 Accepts]: Start accepts. Automaton has 22216 states and 57174 transitions. Word has length 65 [2021-06-12 19:31:09,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:31:09,820 INFO L482 AbstractCegarLoop]: Abstraction has 22216 states and 57174 transitions. [2021-06-12 19:31:09,820 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) [2021-06-12 19:31:09,820 INFO L276 IsEmpty]: Start isEmpty. Operand 22216 states and 57174 transitions. [2021-06-12 19:31:09,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-12 19:31:09,836 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:31:09,836 INFO L472 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:31:10,036 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1455,673 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:31:10,036 INFO L430 AbstractCegarLoop]: === Iteration 682 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:31:10,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:31:10,037 INFO L82 PathProgramCache]: Analyzing trace with hash -703417346, now seen corresponding path program 418 times [2021-06-12 19:31:10,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:31:10,037 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378394421] [2021-06-12 19:31:10,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:31:10,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:31:10,160 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 19 proven. 204 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:31:10,160 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:31:10,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378394421] [2021-06-12 19:31:10,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378394421] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:31:10,160 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057191531] [2021-06-12 19:31:10,160 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 [2021-06-12 19:31:10,189 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:31:10,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:31:10,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-12 19:31:10,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:31:10,286 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 18 proven. 205 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:31:10,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2057191531] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:31:10,287 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:31:10,287 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-06-12 19:31:10,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104598799] [2021-06-12 19:31:10,287 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-12 19:31:10,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:31:10,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-12 19:31:10,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2021-06-12 19:31:10,287 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) [2021-06-12 19:31:11,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:31:11,845 INFO L93 Difference]: Finished difference Result 31885 states and 78097 transitions. [2021-06-12 19:31:11,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-06-12 19:31:11,846 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 [2021-06-12 19:31:11,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:31:11,887 INFO L225 Difference]: With dead ends: 31885 [2021-06-12 19:31:11,887 INFO L226 Difference]: Without dead ends: 31717 [2021-06-12 19:31:11,887 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 69 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1274 ImplicationChecksByTransitivity, 659.9ms TimeCoverageRelationStatistics Valid=381, Invalid=3779, Unknown=0, NotChecked=0, Total=4160 [2021-06-12 19:31:11,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31717 states. [2021-06-12 19:31:12,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31717 to 23319. [2021-06-12 19:31:12,268 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) [2021-06-12 19:31:12,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23319 states to 23319 states and 60082 transitions. [2021-06-12 19:31:12,313 INFO L78 Accepts]: Start accepts. Automaton has 23319 states and 60082 transitions. Word has length 65 [2021-06-12 19:31:12,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:31:12,314 INFO L482 AbstractCegarLoop]: Abstraction has 23319 states and 60082 transitions. [2021-06-12 19:31:12,314 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) [2021-06-12 19:31:12,314 INFO L276 IsEmpty]: Start isEmpty. Operand 23319 states and 60082 transitions. [2021-06-12 19:31:12,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-12 19:31:12,331 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:31:12,331 INFO L472 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:31:12,531 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 674 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1459 [2021-06-12 19:31:12,531 INFO L430 AbstractCegarLoop]: === Iteration 683 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:31:12,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:31:12,531 INFO L82 PathProgramCache]: Analyzing trace with hash -316814669, now seen corresponding path program 419 times [2021-06-12 19:31:12,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:31:12,531 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665371022] [2021-06-12 19:31:12,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:31:12,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:31:12,641 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 62 proven. 164 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:31:12,642 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:31:12,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665371022] [2021-06-12 19:31:12,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665371022] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:31:12,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548894017] [2021-06-12 19:31:12,642 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 [2021-06-12 19:31:12,787 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-06-12 19:31:12,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:31:12,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:31:12,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:31:12,917 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 63 proven. 164 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-12 19:31:12,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [548894017] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:31:12,917 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:31:12,917 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 18 [2021-06-12 19:31:12,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366017109] [2021-06-12 19:31:12,917 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-12 19:31:12,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:31:12,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-12 19:31:12,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2021-06-12 19:31:12,917 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) [2021-06-12 19:31:13,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:31:13,266 INFO L93 Difference]: Finished difference Result 29012 states and 70223 transitions. [2021-06-12 19:31:13,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-12 19:31:13,266 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 [2021-06-12 19:31:13,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:31:13,300 INFO L225 Difference]: With dead ends: 29012 [2021-06-12 19:31:13,300 INFO L226 Difference]: Without dead ends: 28979 [2021-06-12 19:31:13,300 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 159.1ms TimeCoverageRelationStatistics Valid=156, Invalid=350, Unknown=0, NotChecked=0, Total=506 [2021-06-12 19:31:13,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28979 states. [2021-06-12 19:31:13,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28979 to 23319. [2021-06-12 19:31:13,636 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) [2021-06-12 19:31:13,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23319 states to 23319 states and 60073 transitions. [2021-06-12 19:31:13,676 INFO L78 Accepts]: Start accepts. Automaton has 23319 states and 60073 transitions. Word has length 65 [2021-06-12 19:31:13,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:31:13,676 INFO L482 AbstractCegarLoop]: Abstraction has 23319 states and 60073 transitions. [2021-06-12 19:31:13,676 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) [2021-06-12 19:31:13,676 INFO L276 IsEmpty]: Start isEmpty. Operand 23319 states and 60073 transitions. [2021-06-12 19:31:13,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-12 19:31:13,691 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:31:13,691 INFO L472 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:31:13,892 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1460,675 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:31:13,892 INFO L430 AbstractCegarLoop]: === Iteration 684 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:31:13,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:31:13,892 INFO L82 PathProgramCache]: Analyzing trace with hash -763108856, now seen corresponding path program 420 times [2021-06-12 19:31:13,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:31:13,892 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73568555] [2021-06-12 19:31:13,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:31:13,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:31:14,023 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 19 proven. 204 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:31:14,023 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:31:14,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73568555] [2021-06-12 19:31:14,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73568555] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:31:14,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805747706] [2021-06-12 19:31:14,023 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 [2021-06-12 19:31:14,058 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-06-12 19:31:14,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:31:14,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-12 19:31:14,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:31:14,473 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-06-12 19:31:14,474 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 [2021-06-12 19:31:14,475 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-12 19:31:14,483 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-12 19:31:14,483 INFO L518 ElimStorePlain]: Eliminatee B vanished before elimination [2021-06-12 19:31:14,484 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-12 19:31:14,484 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:32, output treesize:19 [2021-06-12 19:31:14,520 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 89 proven. 134 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:31:14,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [805747706] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:31:14,520 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:31:14,520 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 31 [2021-06-12 19:31:14,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314700272] [2021-06-12 19:31:14,520 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-06-12 19:31:14,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:31:14,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-06-12 19:31:14,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=840, Unknown=0, NotChecked=0, Total=992 [2021-06-12 19:31:14,521 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) [2021-06-12 19:31:21,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:31:21,725 INFO L93 Difference]: Finished difference Result 59239 states and 136732 transitions. [2021-06-12 19:31:21,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 248 states. [2021-06-12 19:31:21,726 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 [2021-06-12 19:31:21,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:31:21,815 INFO L225 Difference]: With dead ends: 59239 [2021-06-12 19:31:21,815 INFO L226 Difference]: Without dead ends: 58649 [2021-06-12 19:31:21,818 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 250 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25814 ImplicationChecksByTransitivity, 4948.3ms TimeCoverageRelationStatistics Valid=3924, Invalid=59328, Unknown=0, NotChecked=0, Total=63252 [2021-06-12 19:31:21,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58649 states. [2021-06-12 19:31:22,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58649 to 25834. [2021-06-12 19:31:22,410 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) [2021-06-12 19:31:22,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25834 states to 25834 states and 66847 transitions. [2021-06-12 19:31:22,458 INFO L78 Accepts]: Start accepts. Automaton has 25834 states and 66847 transitions. Word has length 65 [2021-06-12 19:31:22,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:31:22,458 INFO L482 AbstractCegarLoop]: Abstraction has 25834 states and 66847 transitions. [2021-06-12 19:31:22,458 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) [2021-06-12 19:31:22,458 INFO L276 IsEmpty]: Start isEmpty. Operand 25834 states and 66847 transitions. [2021-06-12 19:31:22,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-12 19:31:22,476 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:31:22,476 INFO L472 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:31:22,680 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 676 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1465 [2021-06-12 19:31:22,681 INFO L430 AbstractCegarLoop]: === Iteration 685 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:31:22,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:31:22,681 INFO L82 PathProgramCache]: Analyzing trace with hash 1130464013, now seen corresponding path program 421 times [2021-06-12 19:31:22,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:31:22,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677990155] [2021-06-12 19:31:22,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:31:22,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:31:22,792 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 57 proven. 169 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:31:22,792 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:31:22,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677990155] [2021-06-12 19:31:22,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677990155] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:31:22,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494952472] [2021-06-12 19:31:22,792 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 [2021-06-12 19:31:22,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:31:22,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:31:22,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:31:22,925 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 57 proven. 169 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:31:22,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [494952472] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:31:22,925 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:31:22,925 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-06-12 19:31:22,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654157673] [2021-06-12 19:31:22,925 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-12 19:31:22,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:31:22,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-12 19:31:22,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-06-12 19:31:22,925 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) [2021-06-12 19:31:23,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:31:23,220 INFO L93 Difference]: Finished difference Result 31663 states and 77216 transitions. [2021-06-12 19:31:23,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-12 19:31:23,221 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 [2021-06-12 19:31:23,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:31:23,261 INFO L225 Difference]: With dead ends: 31663 [2021-06-12 19:31:23,261 INFO L226 Difference]: Without dead ends: 31621 [2021-06-12 19:31:23,261 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 131.4ms TimeCoverageRelationStatistics Valid=125, Invalid=255, Unknown=0, NotChecked=0, Total=380 [2021-06-12 19:31:23,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31621 states. [2021-06-12 19:31:23,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31621 to 25834. [2021-06-12 19:31:23,839 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) [2021-06-12 19:31:23,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25834 states to 25834 states and 66838 transitions. [2021-06-12 19:31:23,883 INFO L78 Accepts]: Start accepts. Automaton has 25834 states and 66838 transitions. Word has length 65 [2021-06-12 19:31:23,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:31:23,883 INFO L482 AbstractCegarLoop]: Abstraction has 25834 states and 66838 transitions. [2021-06-12 19:31:23,883 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) [2021-06-12 19:31:23,883 INFO L276 IsEmpty]: Start isEmpty. Operand 25834 states and 66838 transitions. [2021-06-12 19:31:23,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-12 19:31:23,898 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:31:23,898 INFO L472 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:31:24,098 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 677 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1468 [2021-06-12 19:31:24,098 INFO L430 AbstractCegarLoop]: === Iteration 686 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:31:24,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:31:24,098 INFO L82 PathProgramCache]: Analyzing trace with hash -916422722, now seen corresponding path program 422 times [2021-06-12 19:31:24,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:31:24,099 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595857486] [2021-06-12 19:31:24,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:31:24,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:31:24,483 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 19 proven. 204 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:31:24,484 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:31:24,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595857486] [2021-06-12 19:31:24,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595857486] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:31:24,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591528162] [2021-06-12 19:31:24,484 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-06-12 19:31:24,513 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-12 19:31:24,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:31:24,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-12 19:31:24,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:31:24,606 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 18 proven. 205 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:31:24,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1591528162] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:31:24,606 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:31:24,606 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-06-12 19:31:24,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048277787] [2021-06-12 19:31:24,606 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:31:24,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:31:24,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:31:24,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:31:24,607 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) [2021-06-12 19:31:28,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:31:28,814 INFO L93 Difference]: Finished difference Result 71126 states and 168440 transitions. [2021-06-12 19:31:28,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 193 states. [2021-06-12 19:31:28,814 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 [2021-06-12 19:31:28,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:31:28,913 INFO L225 Difference]: With dead ends: 71126 [2021-06-12 19:31:28,914 INFO L226 Difference]: Without dead ends: 69986 [2021-06-12 19:31:28,915 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 67 SyntacticMatches, 2 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15591 ImplicationChecksByTransitivity, 2852.8ms TimeCoverageRelationStatistics Valid=2433, Invalid=34623, Unknown=0, NotChecked=0, Total=37056 [2021-06-12 19:31:28,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69986 states. [2021-06-12 19:31:29,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69986 to 29289. [2021-06-12 19:31:29,654 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) [2021-06-12 19:31:29,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29289 states to 29289 states and 75764 transitions. [2021-06-12 19:31:29,843 INFO L78 Accepts]: Start accepts. Automaton has 29289 states and 75764 transitions. Word has length 65 [2021-06-12 19:31:29,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:31:29,843 INFO L482 AbstractCegarLoop]: Abstraction has 29289 states and 75764 transitions. [2021-06-12 19:31:29,843 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) [2021-06-12 19:31:29,843 INFO L276 IsEmpty]: Start isEmpty. Operand 29289 states and 75764 transitions. [2021-06-12 19:31:29,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-12 19:31:29,859 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:31:29,859 INFO L472 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:31:30,060 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 678 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1474 [2021-06-12 19:31:30,060 INFO L430 AbstractCegarLoop]: === Iteration 687 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:31:30,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:31:30,060 INFO L82 PathProgramCache]: Analyzing trace with hash -167005069, now seen corresponding path program 423 times [2021-06-12 19:31:30,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:31:30,060 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654708728] [2021-06-12 19:31:30,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:31:30,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:31:30,183 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 58 proven. 168 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:31:30,183 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:31:30,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654708728] [2021-06-12 19:31:30,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654708728] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:31:30,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723691595] [2021-06-12 19:31:30,183 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 [2021-06-12 19:31:30,218 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-06-12 19:31:30,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:31:30,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-06-12 19:31:30,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:31:30,315 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 58 proven. 168 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-12 19:31:30,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [723691595] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:31:30,315 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:31:30,315 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2021-06-12 19:31:30,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999820270] [2021-06-12 19:31:30,316 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-12 19:31:30,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:31:30,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-12 19:31:30,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2021-06-12 19:31:30,316 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) [2021-06-12 19:31:30,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-12 19:31:30,676 INFO L93 Difference]: Finished difference Result 35769 states and 87381 transitions. [2021-06-12 19:31:30,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-12 19:31:30,676 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 [2021-06-12 19:31:30,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-12 19:31:30,727 INFO L225 Difference]: With dead ends: 35769 [2021-06-12 19:31:30,727 INFO L226 Difference]: Without dead ends: 35718 [2021-06-12 19:31:30,727 INFO L728 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 152.9ms TimeCoverageRelationStatistics Valid=147, Invalid=315, Unknown=0, NotChecked=0, Total=462 [2021-06-12 19:31:30,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35718 states. [2021-06-12 19:31:31,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35718 to 29289. [2021-06-12 19:31:31,280 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) [2021-06-12 19:31:31,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29289 states to 29289 states and 75755 transitions. [2021-06-12 19:31:31,334 INFO L78 Accepts]: Start accepts. Automaton has 29289 states and 75755 transitions. Word has length 65 [2021-06-12 19:31:31,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-12 19:31:31,334 INFO L482 AbstractCegarLoop]: Abstraction has 29289 states and 75755 transitions. [2021-06-12 19:31:31,334 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) [2021-06-12 19:31:31,334 INFO L276 IsEmpty]: Start isEmpty. Operand 29289 states and 75755 transitions. [2021-06-12 19:31:31,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-06-12 19:31:31,350 INFO L464 BasicCegarLoop]: Found error trace [2021-06-12 19:31:31,350 INFO L472 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-12 19:31:31,551 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 679 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1475 [2021-06-12 19:31:31,551 INFO L430 AbstractCegarLoop]: === Iteration 688 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-12 19:31:31,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-12 19:31:31,551 INFO L82 PathProgramCache]: Analyzing trace with hash 1555398216, now seen corresponding path program 424 times [2021-06-12 19:31:31,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-12 19:31:31,551 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810901952] [2021-06-12 19:31:31,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-12 19:31:31,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-12 19:31:31,710 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 19 proven. 204 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:31:31,710 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-12 19:31:31,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810901952] [2021-06-12 19:31:31,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810901952] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:31:31,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478398383] [2021-06-12 19:31:31,710 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 [2021-06-12 19:31:31,740 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-12 19:31:31,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-12 19:31:31,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-12 19:31:31,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-12 19:31:31,834 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 18 proven. 205 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-12 19:31:31,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1478398383] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-12 19:31:31,834 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-12 19:31:31,835 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 17 [2021-06-12 19:31:31,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995455376] [2021-06-12 19:31:31,835 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-12 19:31:31,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-12 19:31:31,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-12 19:31:31,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=271, Unknown=0, NotChecked=0, Total=306 [2021-06-12 19:31:31,835 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) Received shutdown request... [2021-06-12 19:31:36,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 199 states. [2021-06-12 19:31:36,246 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1482,680 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-12 19:31:36,246 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-12 19:31:36,248 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-12 19:31:36,250 WARN L196 ceAbstractionStarter]: Timeout [2021-06-12 19:31:36,250 INFO L202 PluginConnector]: Adding new model array-eq-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.06 07:31:36 BasicIcfg [2021-06-12 19:31:36,250 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-12 19:31:36,250 INFO L168 Benchmark]: Toolchain (without parser) took 848859.77 ms. Allocated memory was 196.1 MB in the beginning and 5.2 GB in the end (delta: 5.0 GB). Free memory was 175.0 MB in the beginning and 4.4 GB in the end (delta: -4.2 GB). Peak memory consumption was 749.3 MB. Max. memory is 8.0 GB. [2021-06-12 19:31:36,250 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.13 ms. Allocated memory is still 196.1 MB. Free memory is still 176.0 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-06-12 19:31:36,250 INFO L168 Benchmark]: Boogie Procedure Inliner took 32.17 ms. Allocated memory is still 196.1 MB. Free memory was 174.9 MB in the beginning and 173.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-06-12 19:31:36,250 INFO L168 Benchmark]: Boogie Preprocessor took 14.20 ms. Allocated memory is still 196.1 MB. Free memory was 173.5 MB in the beginning and 172.4 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-06-12 19:31:36,251 INFO L168 Benchmark]: RCFGBuilder took 288.81 ms. Allocated memory is still 196.1 MB. Free memory was 172.4 MB in the beginning and 160.9 MB in the end (delta: 11.6 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2021-06-12 19:31:36,251 INFO L168 Benchmark]: TraceAbstraction took 848517.78 ms. Allocated memory was 196.1 MB in the beginning and 5.2 GB in the end (delta: 5.0 GB). Free memory was 160.3 MB in the beginning and 4.4 GB in the end (delta: -4.3 GB). Peak memory consumption was 734.6 MB. Max. memory is 8.0 GB. [2021-06-12 19:31:36,251 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 0.13 ms. Allocated memory is still 196.1 MB. Free memory is still 176.0 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 32.17 ms. Allocated memory is still 196.1 MB. Free memory was 174.9 MB in the beginning and 173.5 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 14.20 ms. Allocated memory is still 196.1 MB. Free memory was 173.5 MB in the beginning and 172.4 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 288.81 ms. Allocated memory is still 196.1 MB. Free memory was 172.4 MB in the beginning and 160.9 MB in the end (delta: 11.6 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 848517.78 ms. Allocated memory was 196.1 MB in the beginning and 5.2 GB in the end (delta: 5.0 GB). Free memory was 160.3 MB in the beginning and 4.4 GB in the end (delta: -4.3 GB). Peak memory consumption was 734.6 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 57]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (29289states) and FLOYD_HOARE automaton (currently 199 states, 18 states before enhancement),while ReachableStatesComputation was computing reachable states (14906 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 5 procedures, 36 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 848432.4ms, OverallIterations: 688, TraceHistogramMax: 10, EmptinessCheckTime: 5855.7ms, AutomataDifference: 424390.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 31.9ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 42655 SDtfs, 210579 SDslu, 292447 SDs, 0 SdLazy, 465081 SolverSat, 16288 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 174196.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 53746 GetRequests, 35453 SyntacticMatches, 808 SemanticMatches, 17485 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 628746 ImplicationChecksByTransitivity, 216665.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=29787occurred in iteration=665, InterpolantAutomatonStates: 16695, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 129628.4ms AutomataMinimizationTime, 687 MinimizatonAttempts, 2580647 StatesRemovedByMinimization, 684 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 2058.5ms SsaConstructionTime, 10674.3ms SatisfiabilityAnalysisTime, 125259.8ms InterpolantComputationTime, 68908 NumberOfCodeBlocks, 68887 NumberOfCodeBlocksAsserted, 4613 NumberOfCheckSat, 67541 ConstructedInterpolants, 643 QuantifiedInterpolants, 522499 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