/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/mult-equiv.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-9b7772ad7705253c1305067fc38dc9bc7271fbe3-9b7772a [2021-04-15 03:54:54,926 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-04-15 03:54:54,929 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-04-15 03:54:54,980 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-04-15 03:54:55,079 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 [2021-04-15 03:54:55,118 INFO L113 SettingsManager]: Loading preferences was successful [2021-04-15 03:54:55,119 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-04-15 03:54:55,119 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-04-15 03:54:55,119 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-04-15 03:54:55,120 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-04-15 03:54:55,121 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-04-15 03:54:55,121 INFO L138 SettingsManager]: * Use SBE=true [2021-04-15 03:54:55,121 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-04-15 03:54:55,121 INFO L138 SettingsManager]: * sizeof long=4 [2021-04-15 03:54:55,121 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-04-15 03:54:55,122 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-04-15 03:54:55,122 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-04-15 03:54:55,122 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-04-15 03:54:55,122 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-04-15 03:54:55,122 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-04-15 03:54:55,122 INFO L138 SettingsManager]: * sizeof long double=12 [2021-04-15 03:54:55,123 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-04-15 03:54:55,123 INFO L138 SettingsManager]: * Use constant arrays=true [2021-04-15 03:54:55,123 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-04-15 03:54:55,123 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-04-15 03:54:55,123 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-04-15 03:54:55,123 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-04-15 03:54:55,123 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-04-15 03:54:55,123 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-04-15 03:54:55,123 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-04-15 03:54:55,124 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-04-15 03:54:55,124 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-04-15 03:54:55,124 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-04-15 03:54:55,124 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-04-15 03:54:55,124 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-04-15 03:54:55,124 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-04-15 03:54:55,124 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-04-15 03:54:55,516 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-04-15 03:54:55,545 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-04-15 03:54:55,548 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-04-15 03:54:55,549 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-04-15 03:54:55,551 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-04-15 03:54:55,553 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/mult-equiv.wvr.bpl [2021-04-15 03:54:55,553 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/mult-equiv.wvr.bpl' [2021-04-15 03:54:55,627 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-04-15 03:54:55,629 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-04-15 03:54:55,631 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-04-15 03:54:55,631 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-04-15 03:54:55,631 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-04-15 03:54:55,645 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "mult-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 03:54:55" (1/1) ... [2021-04-15 03:54:55,655 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "mult-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 03:54:55" (1/1) ... [2021-04-15 03:54:55,673 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-04-15 03:54:55,675 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-04-15 03:54:55,676 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-04-15 03:54:55,676 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-04-15 03:54:55,683 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "mult-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 03:54:55" (1/1) ... [2021-04-15 03:54:55,684 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "mult-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 03:54:55" (1/1) ... [2021-04-15 03:54:55,685 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "mult-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 03:54:55" (1/1) ... [2021-04-15 03:54:55,685 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "mult-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 03:54:55" (1/1) ... [2021-04-15 03:54:55,690 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "mult-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 03:54:55" (1/1) ... [2021-04-15 03:54:55,695 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "mult-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 03:54:55" (1/1) ... [2021-04-15 03:54:55,696 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "mult-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 03:54:55" (1/1) ... [2021-04-15 03:54:55,698 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-04-15 03:54:55,700 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-04-15 03:54:55,700 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-04-15 03:54:55,700 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-04-15 03:54:55,704 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "mult-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 03:54:55" (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 [2021-04-15 03:54:55,782 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-04-15 03:54:55,783 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-04-15 03:54:55,783 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-04-15 03:54:55,783 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-04-15 03:54:55,783 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-04-15 03:54:55,783 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-04-15 03:54:55,783 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-04-15 03:54:55,783 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-04-15 03:54:55,783 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-04-15 03:54:55,784 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-04-15 03:54:55,784 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-04-15 03:54:55,784 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-04-15 03:54:55,785 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-04-15 03:54:56,113 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-04-15 03:54:56,114 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-04-15 03:54:56,117 INFO L202 PluginConnector]: Adding new model mult-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.04 03:54:56 BoogieIcfgContainer [2021-04-15 03:54:56,117 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-04-15 03:54:56,119 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-04-15 03:54:56,119 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-04-15 03:54:56,122 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-04-15 03:54:56,123 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "mult-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 15.04 03:54:55" (1/2) ... [2021-04-15 03:54:56,124 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58978dd4 and model type mult-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.04 03:54:56, skipping insertion in model container [2021-04-15 03:54:56,124 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "mult-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.04 03:54:56" (2/2) ... [2021-04-15 03:54:56,131 INFO L111 eAbstractionObserver]: Analyzing ICFG mult-equiv.wvr.bpl [2021-04-15 03:54:56,141 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-04-15 03:54:56,143 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-04-15 03:54:56,148 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-04-15 03:54:56,149 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-04-15 03:54:56,240 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-04-15 03:54:56,282 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-04-15 03:54:56,342 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-04-15 03:54:56,342 INFO L377 AbstractCegarLoop]: Hoare is true [2021-04-15 03:54:56,342 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-04-15 03:54:56,342 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-04-15 03:54:56,342 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-04-15 03:54:56,342 INFO L381 AbstractCegarLoop]: Difference is false [2021-04-15 03:54:56,342 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-04-15 03:54:56,343 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-04-15 03:54:56,353 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 33 places, 26 transitions, 76 flow [2021-04-15 03:54:56,382 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 111 states, 109 states have (on average 2.853211009174312) internal successors, (311), 110 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:54:56,385 INFO L276 IsEmpty]: Start isEmpty. Operand has 111 states, 109 states have (on average 2.853211009174312) internal successors, (311), 110 states have internal predecessors, (311), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:54:56,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-04-15 03:54:56,397 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:54:56,398 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:54:56,399 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:54:56,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:54:56,408 INFO L82 PathProgramCache]: Analyzing trace with hash -2116175235, now seen corresponding path program 1 times [2021-04-15 03:54:56,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:54:56,419 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378494343] [2021-04-15 03:54:56,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:54:56,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:54:56,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:54:56,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378494343] [2021-04-15 03:54:56,622 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 03:54:56,622 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-04-15 03:54:56,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441177907] [2021-04-15 03:54:56,628 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-04-15 03:54:56,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:54:56,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-04-15 03:54:56,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-04-15 03:54:56,655 INFO L87 Difference]: Start difference. First operand has 111 states, 109 states have (on average 2.853211009174312) internal successors, (311), 110 states have internal predecessors, (311), 0 states have call successors, (0), 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 5.0) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:54:56,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:54:56,728 INFO L93 Difference]: Finished difference Result 214 states and 614 transitions. [2021-04-15 03:54:56,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-04-15 03:54:56,731 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-04-15 03:54:56,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:54:56,756 INFO L225 Difference]: With dead ends: 214 [2021-04-15 03:54:56,756 INFO L226 Difference]: Without dead ends: 199 [2021-04-15 03:54:56,758 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-04-15 03:54:56,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2021-04-15 03:54:56,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 146. [2021-04-15 03:54:56,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 2.8689655172413793) internal successors, (416), 145 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:54:56,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 416 transitions. [2021-04-15 03:54:56,818 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 416 transitions. Word has length 15 [2021-04-15 03:54:56,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:54:56,820 INFO L480 AbstractCegarLoop]: Abstraction has 146 states and 416 transitions. [2021-04-15 03:54:56,820 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:54:56,820 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 416 transitions. [2021-04-15 03:54:56,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-04-15 03:54:56,823 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:54:56,823 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:54:56,823 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-04-15 03:54:56,823 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:54:56,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:54:56,825 INFO L82 PathProgramCache]: Analyzing trace with hash 655800031, now seen corresponding path program 1 times [2021-04-15 03:54:56,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:54:56,825 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980376247] [2021-04-15 03:54:56,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:54:56,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:54:56,936 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:54:56,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980376247] [2021-04-15 03:54:56,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1941339711] [2021-04-15 03:54:56,937 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 [2021-04-15 03:54:56,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:54:56,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 3 conjunts are in the unsatisfiable core [2021-04-15 03:54:57,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:54:57,128 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:54:57,129 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:54:57,129 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 5 [2021-04-15 03:54:57,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096015152] [2021-04-15 03:54:57,131 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-04-15 03:54:57,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:54:57,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-04-15 03:54:57,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-04-15 03:54:57,133 INFO L87 Difference]: Start difference. First operand 146 states and 416 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 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) [2021-04-15 03:54:57,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:54:57,321 INFO L93 Difference]: Finished difference Result 365 states and 1020 transitions. [2021-04-15 03:54:57,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-04-15 03:54:57,329 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 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 17 [2021-04-15 03:54:57,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:54:57,332 INFO L225 Difference]: With dead ends: 365 [2021-04-15 03:54:57,333 INFO L226 Difference]: Without dead ends: 365 [2021-04-15 03:54:57,334 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 41.9ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-04-15 03:54:57,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2021-04-15 03:54:57,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 179. [2021-04-15 03:54:57,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 3.00561797752809) internal successors, (535), 178 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:54:57,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 535 transitions. [2021-04-15 03:54:57,367 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 535 transitions. Word has length 17 [2021-04-15 03:54:57,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:54:57,367 INFO L480 AbstractCegarLoop]: Abstraction has 179 states and 535 transitions. [2021-04-15 03:54:57,367 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 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) [2021-04-15 03:54:57,367 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 535 transitions. [2021-04-15 03:54:57,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-04-15 03:54:57,370 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:54:57,370 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:54:57,591 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-04-15 03:54:57,591 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:54:57,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:54:57,592 INFO L82 PathProgramCache]: Analyzing trace with hash -2126444319, now seen corresponding path program 1 times [2021-04-15 03:54:57,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:54:57,592 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652622297] [2021-04-15 03:54:57,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:54:57,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:54:57,634 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:54:57,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652622297] [2021-04-15 03:54:57,635 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 03:54:57,635 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-04-15 03:54:57,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76788021] [2021-04-15 03:54:57,636 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-04-15 03:54:57,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:54:57,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-04-15 03:54:57,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-04-15 03:54:57,637 INFO L87 Difference]: Start difference. First operand 179 states and 535 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) [2021-04-15 03:54:57,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:54:57,718 INFO L93 Difference]: Finished difference Result 237 states and 680 transitions. [2021-04-15 03:54:57,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-04-15 03:54:57,727 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 [2021-04-15 03:54:57,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:54:57,730 INFO L225 Difference]: With dead ends: 237 [2021-04-15 03:54:57,730 INFO L226 Difference]: Without dead ends: 237 [2021-04-15 03:54:57,730 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.4ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-04-15 03:54:57,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2021-04-15 03:54:57,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 188. [2021-04-15 03:54:57,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 2.9893048128342246) internal successors, (559), 187 states have internal predecessors, (559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:54:57,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 559 transitions. [2021-04-15 03:54:57,759 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 559 transitions. Word has length 17 [2021-04-15 03:54:57,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:54:57,760 INFO L480 AbstractCegarLoop]: Abstraction has 188 states and 559 transitions. [2021-04-15 03:54:57,760 INFO L481 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) [2021-04-15 03:54:57,760 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 559 transitions. [2021-04-15 03:54:57,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-04-15 03:54:57,762 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:54:57,762 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:54:57,763 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-04-15 03:54:57,763 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:54:57,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:54:57,763 INFO L82 PathProgramCache]: Analyzing trace with hash 1369482973, now seen corresponding path program 2 times [2021-04-15 03:54:57,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:54:57,764 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943344681] [2021-04-15 03:54:57,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:54:57,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:54:57,814 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:54:57,814 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943344681] [2021-04-15 03:54:57,815 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 03:54:57,815 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-04-15 03:54:57,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823215947] [2021-04-15 03:54:57,815 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-04-15 03:54:57,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:54:57,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-04-15 03:54:57,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-04-15 03:54:57,817 INFO L87 Difference]: Start difference. First operand 188 states and 559 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) [2021-04-15 03:54:57,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:54:57,862 INFO L93 Difference]: Finished difference Result 293 states and 808 transitions. [2021-04-15 03:54:57,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-04-15 03:54:57,863 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 [2021-04-15 03:54:57,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:54:57,866 INFO L225 Difference]: With dead ends: 293 [2021-04-15 03:54:57,866 INFO L226 Difference]: Without dead ends: 293 [2021-04-15 03:54:57,867 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 13.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-04-15 03:54:57,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2021-04-15 03:54:57,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 164. [2021-04-15 03:54:57,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 2.932515337423313) internal successors, (478), 163 states have internal predecessors, (478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:54:57,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 478 transitions. [2021-04-15 03:54:57,890 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 478 transitions. Word has length 17 [2021-04-15 03:54:57,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:54:57,891 INFO L480 AbstractCegarLoop]: Abstraction has 164 states and 478 transitions. [2021-04-15 03:54:57,891 INFO L481 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) [2021-04-15 03:54:57,891 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 478 transitions. [2021-04-15 03:54:57,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-04-15 03:54:57,893 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:54:57,893 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:54:57,893 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-04-15 03:54:57,894 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:54:57,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:54:57,895 INFO L82 PathProgramCache]: Analyzing trace with hash 984474203, now seen corresponding path program 1 times [2021-04-15 03:54:57,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:54:57,895 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137600332] [2021-04-15 03:54:57,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:54:57,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:54:57,933 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:54:57,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137600332] [2021-04-15 03:54:57,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805131970] [2021-04-15 03:54:57,934 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 [2021-04-15 03:54:57,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:54:57,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 3 conjunts are in the unsatisfiable core [2021-04-15 03:54:57,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:54:58,052 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:54:58,053 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:54:58,053 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 5 [2021-04-15 03:54:58,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804071191] [2021-04-15 03:54:58,054 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-04-15 03:54:58,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:54:58,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-04-15 03:54:58,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-04-15 03:54:58,055 INFO L87 Difference]: Start difference. First operand 164 states and 478 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) [2021-04-15 03:54:58,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:54:58,144 INFO L93 Difference]: Finished difference Result 348 states and 971 transitions. [2021-04-15 03:54:58,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-04-15 03:54:58,145 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 17 [2021-04-15 03:54:58,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:54:58,149 INFO L225 Difference]: With dead ends: 348 [2021-04-15 03:54:58,150 INFO L226 Difference]: Without dead ends: 348 [2021-04-15 03:54:58,150 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 30.8ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-04-15 03:54:58,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2021-04-15 03:54:58,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 170. [2021-04-15 03:54:58,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 169 states have (on average 2.964497041420118) internal successors, (501), 169 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:54:58,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 501 transitions. [2021-04-15 03:54:58,187 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 501 transitions. Word has length 17 [2021-04-15 03:54:58,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:54:58,187 INFO L480 AbstractCegarLoop]: Abstraction has 170 states and 501 transitions. [2021-04-15 03:54:58,187 INFO L481 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) [2021-04-15 03:54:58,187 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 501 transitions. [2021-04-15 03:54:58,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-04-15 03:54:58,189 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:54:58,189 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:54:58,405 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:54:58,405 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:54:58,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:54:58,406 INFO L82 PathProgramCache]: Analyzing trace with hash -427193509, now seen corresponding path program 3 times [2021-04-15 03:54:58,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:54:58,406 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895357930] [2021-04-15 03:54:58,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:54:58,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:54:58,440 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:54:58,440 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895357930] [2021-04-15 03:54:58,441 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 03:54:58,441 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-04-15 03:54:58,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434151636] [2021-04-15 03:54:58,441 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-04-15 03:54:58,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:54:58,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-04-15 03:54:58,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-04-15 03:54:58,442 INFO L87 Difference]: Start difference. First operand 170 states and 501 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) [2021-04-15 03:54:58,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:54:58,485 INFO L93 Difference]: Finished difference Result 204 states and 542 transitions. [2021-04-15 03:54:58,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-04-15 03:54:58,485 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 [2021-04-15 03:54:58,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:54:58,487 INFO L225 Difference]: With dead ends: 204 [2021-04-15 03:54:58,487 INFO L226 Difference]: Without dead ends: 174 [2021-04-15 03:54:58,487 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.6ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-04-15 03:54:58,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-04-15 03:54:58,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 155. [2021-04-15 03:54:58,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 2.779220779220779) internal successors, (428), 154 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:54:58,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 428 transitions. [2021-04-15 03:54:58,496 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 428 transitions. Word has length 17 [2021-04-15 03:54:58,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:54:58,496 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 428 transitions. [2021-04-15 03:54:58,497 INFO L481 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) [2021-04-15 03:54:58,497 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 428 transitions. [2021-04-15 03:54:58,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 03:54:58,498 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:54:58,498 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:54:58,499 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-04-15 03:54:58,499 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:54:58,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:54:58,499 INFO L82 PathProgramCache]: Analyzing trace with hash 1972981309, now seen corresponding path program 1 times [2021-04-15 03:54:58,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:54:58,500 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431906279] [2021-04-15 03:54:58,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:54:58,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:54:58,551 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:54:58,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431906279] [2021-04-15 03:54:58,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655570403] [2021-04-15 03:54:58,551 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 [2021-04-15 03:54:58,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:54:58,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 4 conjunts are in the unsatisfiable core [2021-04-15 03:54:58,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:54:58,700 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:54:58,700 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:54:58,700 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 6 [2021-04-15 03:54:58,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216087025] [2021-04-15 03:54:58,701 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 03:54:58,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:54:58,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 03:54:58,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-04-15 03:54:58,702 INFO L87 Difference]: Start difference. First operand 155 states and 428 transitions. Second operand has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:54:58,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:54:58,825 INFO L93 Difference]: Finished difference Result 284 states and 786 transitions. [2021-04-15 03:54:58,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-04-15 03:54:58,826 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 03:54:58,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:54:58,829 INFO L225 Difference]: With dead ends: 284 [2021-04-15 03:54:58,829 INFO L226 Difference]: Without dead ends: 284 [2021-04-15 03:54:58,830 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 62.3ms TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-04-15 03:54:58,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2021-04-15 03:54:58,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 216. [2021-04-15 03:54:58,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 2.827906976744186) internal successors, (608), 215 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:54:58,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 608 transitions. [2021-04-15 03:54:58,861 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 608 transitions. Word has length 19 [2021-04-15 03:54:58,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:54:58,862 INFO L480 AbstractCegarLoop]: Abstraction has 216 states and 608 transitions. [2021-04-15 03:54:58,862 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:54:58,862 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 608 transitions. [2021-04-15 03:54:58,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 03:54:58,871 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:54:58,871 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:54:59,076 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:54:59,077 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:54:59,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:54:59,078 INFO L82 PathProgramCache]: Analyzing trace with hash 179262851, now seen corresponding path program 1 times [2021-04-15 03:54:59,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:54:59,078 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785055894] [2021-04-15 03:54:59,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:54:59,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:54:59,196 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 03:54:59,196 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785055894] [2021-04-15 03:54:59,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087395612] [2021-04-15 03:54:59,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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) [2021-04-15 03:54:59,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:54:59,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 8 conjunts are in the unsatisfiable core [2021-04-15 03:54:59,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:54:59,383 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 03:54:59,384 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:54:59,384 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-04-15 03:54:59,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739632584] [2021-04-15 03:54:59,385 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-04-15 03:54:59,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:54:59,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-04-15 03:54:59,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-04-15 03:54:59,386 INFO L87 Difference]: Start difference. First operand 216 states and 608 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:54:59,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:54:59,429 INFO L93 Difference]: Finished difference Result 348 states and 985 transitions. [2021-04-15 03:54:59,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-04-15 03:54:59,429 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 03:54:59,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:54:59,432 INFO L225 Difference]: With dead ends: 348 [2021-04-15 03:54:59,432 INFO L226 Difference]: Without dead ends: 327 [2021-04-15 03:54:59,433 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 51.2ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-04-15 03:54:59,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2021-04-15 03:54:59,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 250. [2021-04-15 03:54:59,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 249 states have (on average 2.895582329317269) internal successors, (721), 249 states have internal predecessors, (721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:54:59,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 721 transitions. [2021-04-15 03:54:59,444 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 721 transitions. Word has length 19 [2021-04-15 03:54:59,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:54:59,445 INFO L480 AbstractCegarLoop]: Abstraction has 250 states and 721 transitions. [2021-04-15 03:54:59,445 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:54:59,445 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 721 transitions. [2021-04-15 03:54:59,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 03:54:59,447 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:54:59,447 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:54:59,661 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:54:59,661 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:54:59,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:54:59,662 INFO L82 PathProgramCache]: Analyzing trace with hash -701176209, now seen corresponding path program 2 times [2021-04-15 03:54:59,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:54:59,662 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617298230] [2021-04-15 03:54:59,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:54:59,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:54:59,719 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 03:54:59,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617298230] [2021-04-15 03:54:59,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390816848] [2021-04-15 03:54:59,720 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2021-04-15 03:54:59,759 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 03:54:59,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:54:59,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 8 conjunts are in the unsatisfiable core [2021-04-15 03:54:59,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:54:59,887 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 03:54:59,888 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:54:59,888 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-04-15 03:54:59,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067969086] [2021-04-15 03:54:59,892 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-04-15 03:54:59,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:54:59,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-04-15 03:54:59,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-04-15 03:54:59,900 INFO L87 Difference]: Start difference. First operand 250 states and 721 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:54:59,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:54:59,946 INFO L93 Difference]: Finished difference Result 521 states and 1486 transitions. [2021-04-15 03:54:59,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-04-15 03:54:59,947 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 03:54:59,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:54:59,951 INFO L225 Difference]: With dead ends: 521 [2021-04-15 03:54:59,952 INFO L226 Difference]: Without dead ends: 500 [2021-04-15 03:54:59,953 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 28.8ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-04-15 03:54:59,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 500 states. [2021-04-15 03:54:59,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 500 to 290. [2021-04-15 03:54:59,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 289 states have (on average 3.0069204152249136) internal successors, (869), 289 states have internal predecessors, (869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:54:59,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 869 transitions. [2021-04-15 03:54:59,969 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 869 transitions. Word has length 19 [2021-04-15 03:54:59,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:54:59,980 INFO L480 AbstractCegarLoop]: Abstraction has 290 states and 869 transitions. [2021-04-15 03:54:59,981 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:54:59,981 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 869 transitions. [2021-04-15 03:54:59,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 03:54:59,982 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:54:59,982 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:55:00,203 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:55:00,203 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:55:00,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:55:00,204 INFO L82 PathProgramCache]: Analyzing trace with hash -1410387015, now seen corresponding path program 3 times [2021-04-15 03:55:00,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:55:00,204 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427143041] [2021-04-15 03:55:00,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:55:00,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:55:00,277 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:55:00,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427143041] [2021-04-15 03:55:00,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375793621] [2021-04-15 03:55:00,278 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2021-04-15 03:55:00,318 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-04-15 03:55:00,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:55:00,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 8 conjunts are in the unsatisfiable core [2021-04-15 03:55:00,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:55:00,444 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:55:00,445 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:55:00,445 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-04-15 03:55:00,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995185951] [2021-04-15 03:55:00,450 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-04-15 03:55:00,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:55:00,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-04-15 03:55:00,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-04-15 03:55:00,452 INFO L87 Difference]: Start difference. First operand 290 states and 869 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:55:00,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:55:00,498 INFO L93 Difference]: Finished difference Result 528 states and 1543 transitions. [2021-04-15 03:55:00,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-04-15 03:55:00,499 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-04-15 03:55:00,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:55:00,502 INFO L225 Difference]: With dead ends: 528 [2021-04-15 03:55:00,503 INFO L226 Difference]: Without dead ends: 507 [2021-04-15 03:55:00,503 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 46.4ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-04-15 03:55:00,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2021-04-15 03:55:00,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 326. [2021-04-15 03:55:00,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 326 states, 325 states have (on average 3.08) internal successors, (1001), 325 states have internal predecessors, (1001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:55:00,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 326 states to 326 states and 1001 transitions. [2021-04-15 03:55:00,520 INFO L78 Accepts]: Start accepts. Automaton has 326 states and 1001 transitions. Word has length 19 [2021-04-15 03:55:00,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:55:00,520 INFO L480 AbstractCegarLoop]: Abstraction has 326 states and 1001 transitions. [2021-04-15 03:55:00,520 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:55:00,521 INFO L276 IsEmpty]: Start isEmpty. Operand 326 states and 1001 transitions. [2021-04-15 03:55:00,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 03:55:00,523 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:55:00,523 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:55:00,725 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:55:00,726 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:55:00,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:55:00,726 INFO L82 PathProgramCache]: Analyzing trace with hash 1264041205, now seen corresponding path program 2 times [2021-04-15 03:55:00,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:55:00,726 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59426058] [2021-04-15 03:55:00,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:55:00,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:55:00,762 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:55:00,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59426058] [2021-04-15 03:55:00,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651467882] [2021-04-15 03:55:00,763 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2021-04-15 03:55:00,789 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 03:55:00,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:55:00,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 4 conjunts are in the unsatisfiable core [2021-04-15 03:55:00,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:55:00,842 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:55:00,842 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:55:00,842 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-04-15 03:55:00,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850878184] [2021-04-15 03:55:00,844 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-04-15 03:55:00,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:55:00,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-04-15 03:55:00,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-04-15 03:55:00,845 INFO L87 Difference]: Start difference. First operand 326 states and 1001 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) [2021-04-15 03:55:00,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:55:00,965 INFO L93 Difference]: Finished difference Result 686 states and 2051 transitions. [2021-04-15 03:55:00,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-04-15 03:55:00,966 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 19 [2021-04-15 03:55:00,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:55:00,970 INFO L225 Difference]: With dead ends: 686 [2021-04-15 03:55:00,971 INFO L226 Difference]: Without dead ends: 686 [2021-04-15 03:55:00,971 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 42.3ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-04-15 03:55:00,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 686 states. [2021-04-15 03:55:00,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 686 to 370. [2021-04-15 03:55:00,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 369 states have (on average 3.2466124661246614) internal successors, (1198), 369 states have internal predecessors, (1198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:55:00,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 1198 transitions. [2021-04-15 03:55:00,993 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 1198 transitions. Word has length 19 [2021-04-15 03:55:00,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:55:00,993 INFO L480 AbstractCegarLoop]: Abstraction has 370 states and 1198 transitions. [2021-04-15 03:55:00,993 INFO L481 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) [2021-04-15 03:55:00,993 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 1198 transitions. [2021-04-15 03:55:00,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-04-15 03:55:00,995 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:55:00,995 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:55:01,221 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:55:01,221 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:55:01,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:55:01,222 INFO L82 PathProgramCache]: Analyzing trace with hash 1749845309, now seen corresponding path program 3 times [2021-04-15 03:55:01,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:55:01,222 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835385683] [2021-04-15 03:55:01,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:55:01,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:55:01,271 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:55:01,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835385683] [2021-04-15 03:55:01,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18639874] [2021-04-15 03:55:01,272 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-15 03:55:01,301 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-04-15 03:55:01,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:55:01,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 4 conjunts are in the unsatisfiable core [2021-04-15 03:55:01,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:55:01,360 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:55:01,361 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:55:01,361 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-04-15 03:55:01,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678911789] [2021-04-15 03:55:01,362 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-04-15 03:55:01,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:55:01,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-04-15 03:55:01,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-04-15 03:55:01,363 INFO L87 Difference]: Start difference. First operand 370 states and 1198 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) [2021-04-15 03:55:01,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:55:01,519 INFO L93 Difference]: Finished difference Result 642 states and 2005 transitions. [2021-04-15 03:55:01,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-04-15 03:55:01,520 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 19 [2021-04-15 03:55:01,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:55:01,525 INFO L225 Difference]: With dead ends: 642 [2021-04-15 03:55:01,525 INFO L226 Difference]: Without dead ends: 642 [2021-04-15 03:55:01,526 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 37.9ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-04-15 03:55:01,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 642 states. [2021-04-15 03:55:01,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 642 to 388. [2021-04-15 03:55:01,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 387 states have (on average 3.289405684754522) internal successors, (1273), 387 states have internal predecessors, (1273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:55:01,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 1273 transitions. [2021-04-15 03:55:01,548 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 1273 transitions. Word has length 19 [2021-04-15 03:55:01,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:55:01,548 INFO L480 AbstractCegarLoop]: Abstraction has 388 states and 1273 transitions. [2021-04-15 03:55:01,548 INFO L481 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) [2021-04-15 03:55:01,549 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 1273 transitions. [2021-04-15 03:55:01,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 03:55:01,552 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:55:01,552 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:55:01,753 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-04-15 03:55:01,754 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:55:01,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:55:01,754 INFO L82 PathProgramCache]: Analyzing trace with hash 768837147, now seen corresponding path program 4 times [2021-04-15 03:55:01,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:55:01,755 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500605408] [2021-04-15 03:55:01,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:55:01,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:55:01,830 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:55:01,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500605408] [2021-04-15 03:55:01,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951347668] [2021-04-15 03:55:01,831 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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 [2021-04-15 03:55:01,865 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 03:55:01,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:55:01,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 03:55:01,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:55:01,962 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:55:01,963 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:55:01,963 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-04-15 03:55:01,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078756801] [2021-04-15 03:55:01,964 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-04-15 03:55:01,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:55:01,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-04-15 03:55:01,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-04-15 03:55:01,967 INFO L87 Difference]: Start difference. First operand 388 states and 1273 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:55:02,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:55:02,022 INFO L93 Difference]: Finished difference Result 752 states and 2293 transitions. [2021-04-15 03:55:02,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-04-15 03:55:02,023 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 03:55:02,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:55:02,029 INFO L225 Difference]: With dead ends: 752 [2021-04-15 03:55:02,029 INFO L226 Difference]: Without dead ends: 731 [2021-04-15 03:55:02,029 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 5 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 40.5ms TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-04-15 03:55:02,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 731 states. [2021-04-15 03:55:02,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 731 to 468. [2021-04-15 03:55:02,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 468 states, 467 states have (on average 3.278372591006424) internal successors, (1531), 467 states have internal predecessors, (1531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:55:02,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 468 states to 468 states and 1531 transitions. [2021-04-15 03:55:02,054 INFO L78 Accepts]: Start accepts. Automaton has 468 states and 1531 transitions. Word has length 21 [2021-04-15 03:55:02,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:55:02,054 INFO L480 AbstractCegarLoop]: Abstraction has 468 states and 1531 transitions. [2021-04-15 03:55:02,054 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:55:02,055 INFO L276 IsEmpty]: Start isEmpty. Operand 468 states and 1531 transitions. [2021-04-15 03:55:02,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 03:55:02,059 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:55:02,060 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:55:02,273 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:55:02,274 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:55:02,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:55:02,275 INFO L82 PathProgramCache]: Analyzing trace with hash -1069401327, now seen corresponding path program 5 times [2021-04-15 03:55:02,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:55:02,275 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962321839] [2021-04-15 03:55:02,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:55:02,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:55:02,345 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:55:02,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962321839] [2021-04-15 03:55:02,345 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270136191] [2021-04-15 03:55:02,345 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 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 [2021-04-15 03:55:02,408 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 03:55:02,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:55:02,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 03:55:02,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:55:02,504 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:55:02,505 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:55:02,505 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-04-15 03:55:02,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619293138] [2021-04-15 03:55:02,507 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-04-15 03:55:02,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:55:02,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-04-15 03:55:02,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-04-15 03:55:02,508 INFO L87 Difference]: Start difference. First operand 468 states and 1531 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:55:02,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:55:02,570 INFO L93 Difference]: Finished difference Result 738 states and 2318 transitions. [2021-04-15 03:55:02,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-04-15 03:55:02,571 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 03:55:02,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:55:02,576 INFO L225 Difference]: With dead ends: 738 [2021-04-15 03:55:02,576 INFO L226 Difference]: Without dead ends: 717 [2021-04-15 03:55:02,576 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 37.9ms TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-04-15 03:55:02,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 717 states. [2021-04-15 03:55:02,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 717 to 485. [2021-04-15 03:55:02,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 485 states, 484 states have (on average 3.3161157024793386) internal successors, (1605), 484 states have internal predecessors, (1605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:55:02,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 485 states to 485 states and 1605 transitions. [2021-04-15 03:55:02,603 INFO L78 Accepts]: Start accepts. Automaton has 485 states and 1605 transitions. Word has length 21 [2021-04-15 03:55:02,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:55:02,605 INFO L480 AbstractCegarLoop]: Abstraction has 485 states and 1605 transitions. [2021-04-15 03:55:02,606 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:55:02,606 INFO L276 IsEmpty]: Start isEmpty. Operand 485 states and 1605 transitions. [2021-04-15 03:55:02,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 03:55:02,608 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:55:02,609 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:55:02,828 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:55:02,828 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:55:02,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:55:02,829 INFO L82 PathProgramCache]: Analyzing trace with hash -1991189035, now seen corresponding path program 6 times [2021-04-15 03:55:02,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:55:02,829 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251244366] [2021-04-15 03:55:02,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:55:02,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:55:02,932 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 03:55:02,932 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251244366] [2021-04-15 03:55:02,932 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307206094] [2021-04-15 03:55:02,932 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2021-04-15 03:55:02,967 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-04-15 03:55:02,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:55:02,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 03:55:02,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:55:03,059 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 03:55:03,060 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:55:03,060 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-04-15 03:55:03,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514836003] [2021-04-15 03:55:03,061 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-04-15 03:55:03,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:55:03,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-04-15 03:55:03,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-04-15 03:55:03,062 INFO L87 Difference]: Start difference. First operand 485 states and 1605 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:55:03,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:55:03,116 INFO L93 Difference]: Finished difference Result 608 states and 1958 transitions. [2021-04-15 03:55:03,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-04-15 03:55:03,117 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 03:55:03,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:55:03,121 INFO L225 Difference]: With dead ends: 608 [2021-04-15 03:55:03,121 INFO L226 Difference]: Without dead ends: 587 [2021-04-15 03:55:03,123 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 60.4ms TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-04-15 03:55:03,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 587 states. [2021-04-15 03:55:03,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 587 to 495. [2021-04-15 03:55:03,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 495 states, 494 states have (on average 3.3238866396761133) internal successors, (1642), 494 states have internal predecessors, (1642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:55:03,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 495 states to 495 states and 1642 transitions. [2021-04-15 03:55:03,145 INFO L78 Accepts]: Start accepts. Automaton has 495 states and 1642 transitions. Word has length 21 [2021-04-15 03:55:03,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:55:03,146 INFO L480 AbstractCegarLoop]: Abstraction has 495 states and 1642 transitions. [2021-04-15 03:55:03,146 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:55:03,146 INFO L276 IsEmpty]: Start isEmpty. Operand 495 states and 1642 transitions. [2021-04-15 03:55:03,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 03:55:03,148 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:55:03,149 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:55:03,373 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-04-15 03:55:03,373 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:55:03,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:55:03,374 INFO L82 PathProgramCache]: Analyzing trace with hash -239271515, now seen corresponding path program 4 times [2021-04-15 03:55:03,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:55:03,374 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724706785] [2021-04-15 03:55:03,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:55:03,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:55:03,403 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:55:03,403 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724706785] [2021-04-15 03:55:03,403 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524914668] [2021-04-15 03:55:03,403 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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 [2021-04-15 03:55:03,426 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 03:55:03,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:55:03,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 4 conjunts are in the unsatisfiable core [2021-04-15 03:55:03,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:55:03,479 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:55:03,480 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-04-15 03:55:03,480 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-04-15 03:55:03,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750167297] [2021-04-15 03:55:03,480 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-04-15 03:55:03,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:55:03,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-04-15 03:55:03,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-04-15 03:55:03,481 INFO L87 Difference]: Start difference. First operand 495 states and 1642 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:55:03,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:55:03,557 INFO L93 Difference]: Finished difference Result 728 states and 2245 transitions. [2021-04-15 03:55:03,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 03:55:03,557 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 03:55:03,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:55:03,562 INFO L225 Difference]: With dead ends: 728 [2021-04-15 03:55:03,562 INFO L226 Difference]: Without dead ends: 696 [2021-04-15 03:55:03,563 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 32.4ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-04-15 03:55:03,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 696 states. [2021-04-15 03:55:03,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 696 to 583. [2021-04-15 03:55:03,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 583 states, 582 states have (on average 3.261168384879725) internal successors, (1898), 582 states have internal predecessors, (1898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:55:03,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 583 states to 583 states and 1898 transitions. [2021-04-15 03:55:03,591 INFO L78 Accepts]: Start accepts. Automaton has 583 states and 1898 transitions. Word has length 21 [2021-04-15 03:55:03,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:55:03,592 INFO L480 AbstractCegarLoop]: Abstraction has 583 states and 1898 transitions. [2021-04-15 03:55:03,592 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:55:03,592 INFO L276 IsEmpty]: Start isEmpty. Operand 583 states and 1898 transitions. [2021-04-15 03:55:03,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 03:55:03,595 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:55:03,595 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:55:03,821 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-04-15 03:55:03,821 INFO L428 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:55:03,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:55:03,822 INFO L82 PathProgramCache]: Analyzing trace with hash -2124383007, now seen corresponding path program 5 times [2021-04-15 03:55:03,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:55:03,822 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001630801] [2021-04-15 03:55:03,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:55:03,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:55:03,855 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 03:55:03,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001630801] [2021-04-15 03:55:03,855 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-04-15 03:55:03,856 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-04-15 03:55:03,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786985960] [2021-04-15 03:55:03,879 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-04-15 03:55:03,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:55:03,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-04-15 03:55:03,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-04-15 03:55:03,880 INFO L87 Difference]: Start difference. First operand 583 states and 1898 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:55:03,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:55:03,904 INFO L93 Difference]: Finished difference Result 673 states and 2107 transitions. [2021-04-15 03:55:03,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-04-15 03:55:03,905 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 03:55:03,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:55:03,909 INFO L225 Difference]: With dead ends: 673 [2021-04-15 03:55:03,909 INFO L226 Difference]: Without dead ends: 625 [2021-04-15 03:55:03,910 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-04-15 03:55:03,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 625 states. [2021-04-15 03:55:03,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 625 to 529. [2021-04-15 03:55:03,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 529 states, 528 states have (on average 3.2556818181818183) internal successors, (1719), 528 states have internal predecessors, (1719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:55:03,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 529 states to 529 states and 1719 transitions. [2021-04-15 03:55:03,935 INFO L78 Accepts]: Start accepts. Automaton has 529 states and 1719 transitions. Word has length 21 [2021-04-15 03:55:03,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:55:03,935 INFO L480 AbstractCegarLoop]: Abstraction has 529 states and 1719 transitions. [2021-04-15 03:55:03,935 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:55:03,935 INFO L276 IsEmpty]: Start isEmpty. Operand 529 states and 1719 transitions. [2021-04-15 03:55:03,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 03:55:03,938 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:55:03,938 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:55:03,938 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-04-15 03:55:03,938 INFO L428 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:55:03,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:55:03,939 INFO L82 PathProgramCache]: Analyzing trace with hash 1743968741, now seen corresponding path program 6 times [2021-04-15 03:55:03,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:55:03,939 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [260660871] [2021-04-15 03:55:03,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:55:03,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:55:03,978 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:55:03,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [260660871] [2021-04-15 03:55:03,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062630103] [2021-04-15 03:55:03,979 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 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 [2021-04-15 03:55:04,020 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-04-15 03:55:04,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:55:04,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 4 conjunts are in the unsatisfiable core [2021-04-15 03:55:04,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:55:04,068 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:55:04,068 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:55:04,068 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-04-15 03:55:04,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302105598] [2021-04-15 03:55:04,069 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-04-15 03:55:04,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:55:04,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-04-15 03:55:04,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-04-15 03:55:04,070 INFO L87 Difference]: Start difference. First operand 529 states and 1719 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) [2021-04-15 03:55:04,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:55:04,171 INFO L93 Difference]: Finished difference Result 834 states and 2517 transitions. [2021-04-15 03:55:04,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-04-15 03:55:04,172 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 21 [2021-04-15 03:55:04,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:55:04,176 INFO L225 Difference]: With dead ends: 834 [2021-04-15 03:55:04,176 INFO L226 Difference]: Without dead ends: 804 [2021-04-15 03:55:04,176 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 29.2ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-04-15 03:55:04,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 804 states. [2021-04-15 03:55:04,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 804 to 598. [2021-04-15 03:55:04,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 598 states, 597 states have (on average 3.2981574539363483) internal successors, (1969), 597 states have internal predecessors, (1969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:55:04,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 598 states to 598 states and 1969 transitions. [2021-04-15 03:55:04,208 INFO L78 Accepts]: Start accepts. Automaton has 598 states and 1969 transitions. Word has length 21 [2021-04-15 03:55:04,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:55:04,208 INFO L480 AbstractCegarLoop]: Abstraction has 598 states and 1969 transitions. [2021-04-15 03:55:04,208 INFO L481 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) [2021-04-15 03:55:04,209 INFO L276 IsEmpty]: Start isEmpty. Operand 598 states and 1969 transitions. [2021-04-15 03:55:04,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 03:55:04,211 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:55:04,212 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:55:04,425 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-04-15 03:55:04,425 INFO L428 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:55:04,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:55:04,425 INFO L82 PathProgramCache]: Analyzing trace with hash 685016161, now seen corresponding path program 7 times [2021-04-15 03:55:04,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:55:04,426 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520621517] [2021-04-15 03:55:04,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:55:04,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:55:04,460 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:55:04,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520621517] [2021-04-15 03:55:04,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516151815] [2021-04-15 03:55:04,461 INFO 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 [2021-04-15 03:55:04,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:55:04,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 4 conjunts are in the unsatisfiable core [2021-04-15 03:55:04,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:55:04,572 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:55:04,573 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-04-15 03:55:04,573 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 5 [2021-04-15 03:55:04,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595994258] [2021-04-15 03:55:04,575 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-04-15 03:55:04,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:55:04,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-04-15 03:55:04,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-04-15 03:55:04,576 INFO L87 Difference]: Start difference. First operand 598 states and 1969 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:55:04,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:55:04,656 INFO L93 Difference]: Finished difference Result 790 states and 2403 transitions. [2021-04-15 03:55:04,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 03:55:04,656 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 03:55:04,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:55:04,662 INFO L225 Difference]: With dead ends: 790 [2021-04-15 03:55:04,662 INFO L226 Difference]: Without dead ends: 782 [2021-04-15 03:55:04,663 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 39.7ms TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-04-15 03:55:04,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 782 states. [2021-04-15 03:55:04,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 782 to 591. [2021-04-15 03:55:04,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 591 states, 590 states have (on average 3.2711864406779663) internal successors, (1930), 590 states have internal predecessors, (1930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:55:04,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 591 states to 591 states and 1930 transitions. [2021-04-15 03:55:04,686 INFO L78 Accepts]: Start accepts. Automaton has 591 states and 1930 transitions. Word has length 21 [2021-04-15 03:55:04,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:55:04,686 INFO L480 AbstractCegarLoop]: Abstraction has 591 states and 1930 transitions. [2021-04-15 03:55:04,687 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:55:04,687 INFO L276 IsEmpty]: Start isEmpty. Operand 591 states and 1930 transitions. [2021-04-15 03:55:04,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 03:55:04,690 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:55:04,690 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:55:04,912 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:55:04,913 INFO L428 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:55:04,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:55:04,913 INFO L82 PathProgramCache]: Analyzing trace with hash 1433719009, now seen corresponding path program 8 times [2021-04-15 03:55:04,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:55:04,914 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818235438] [2021-04-15 03:55:04,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:55:04,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:55:04,950 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:55:04,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818235438] [2021-04-15 03:55:04,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904169838] [2021-04-15 03:55:04,951 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-15 03:55:04,983 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 03:55:04,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:55:04,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 6 conjunts are in the unsatisfiable core [2021-04-15 03:55:04,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:55:05,066 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:55:05,066 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:55:05,067 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 8 [2021-04-15 03:55:05,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2654487] [2021-04-15 03:55:05,067 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-04-15 03:55:05,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:55:05,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-04-15 03:55:05,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-04-15 03:55:05,068 INFO L87 Difference]: Start difference. First operand 591 states and 1930 transitions. Second operand has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 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) [2021-04-15 03:55:05,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:55:05,219 INFO L93 Difference]: Finished difference Result 768 states and 2356 transitions. [2021-04-15 03:55:05,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-04-15 03:55:05,220 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 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 21 [2021-04-15 03:55:05,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:55:05,225 INFO L225 Difference]: With dead ends: 768 [2021-04-15 03:55:05,225 INFO L226 Difference]: Without dead ends: 732 [2021-04-15 03:55:05,225 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 86.8ms TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-04-15 03:55:05,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 732 states. [2021-04-15 03:55:05,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 732 to 589. [2021-04-15 03:55:05,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 589 states, 588 states have (on average 3.241496598639456) internal successors, (1906), 588 states have internal predecessors, (1906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:55:05,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 589 states to 589 states and 1906 transitions. [2021-04-15 03:55:05,250 INFO L78 Accepts]: Start accepts. Automaton has 589 states and 1906 transitions. Word has length 21 [2021-04-15 03:55:05,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:55:05,250 INFO L480 AbstractCegarLoop]: Abstraction has 589 states and 1906 transitions. [2021-04-15 03:55:05,250 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.2222222222222223) internal successors, (29), 8 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) [2021-04-15 03:55:05,250 INFO L276 IsEmpty]: Start isEmpty. Operand 589 states and 1906 transitions. [2021-04-15 03:55:05,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 03:55:05,253 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:55:05,253 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:55:05,472 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:55:05,473 INFO L428 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:55:05,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:55:05,473 INFO L82 PathProgramCache]: Analyzing trace with hash 1263605021, now seen corresponding path program 9 times [2021-04-15 03:55:05,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:55:05,474 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646590094] [2021-04-15 03:55:05,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:55:05,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:55:05,534 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:55:05,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646590094] [2021-04-15 03:55:05,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219098999] [2021-04-15 03:55:05,534 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2021-04-15 03:55:05,568 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-04-15 03:55:05,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:55:05,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 6 conjunts are in the unsatisfiable core [2021-04-15 03:55:05,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:55:05,663 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:55:05,664 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:55:05,664 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-04-15 03:55:05,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832376357] [2021-04-15 03:55:05,667 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-04-15 03:55:05,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:55:05,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-04-15 03:55:05,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2021-04-15 03:55:05,668 INFO L87 Difference]: Start difference. First operand 589 states and 1906 transitions. Second operand has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 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) [2021-04-15 03:55:05,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:55:05,861 INFO L93 Difference]: Finished difference Result 1001 states and 3072 transitions. [2021-04-15 03:55:05,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-04-15 03:55:05,862 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 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 21 [2021-04-15 03:55:05,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:55:05,868 INFO L225 Difference]: With dead ends: 1001 [2021-04-15 03:55:05,868 INFO L226 Difference]: Without dead ends: 987 [2021-04-15 03:55:05,869 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 88.7ms TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-04-15 03:55:05,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 987 states. [2021-04-15 03:55:05,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 987 to 737. [2021-04-15 03:55:05,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 737 states, 736 states have (on average 3.2880434782608696) internal successors, (2420), 736 states have internal predecessors, (2420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:55:05,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 737 states to 737 states and 2420 transitions. [2021-04-15 03:55:05,898 INFO L78 Accepts]: Start accepts. Automaton has 737 states and 2420 transitions. Word has length 21 [2021-04-15 03:55:05,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:55:05,898 INFO L480 AbstractCegarLoop]: Abstraction has 737 states and 2420 transitions. [2021-04-15 03:55:05,898 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 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) [2021-04-15 03:55:05,898 INFO L276 IsEmpty]: Start isEmpty. Operand 737 states and 2420 transitions. [2021-04-15 03:55:05,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 03:55:05,903 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:55:05,903 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:55:06,117 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:55:06,117 INFO L428 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:55:06,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:55:06,118 INFO L82 PathProgramCache]: Analyzing trace with hash -585994983, now seen corresponding path program 10 times [2021-04-15 03:55:06,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:55:06,118 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026433635] [2021-04-15 03:55:06,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:55:06,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:55:06,176 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:55:06,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026433635] [2021-04-15 03:55:06,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006508689] [2021-04-15 03:55:06,176 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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 [2021-04-15 03:55:06,205 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 03:55:06,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:55:06,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 6 conjunts are in the unsatisfiable core [2021-04-15 03:55:06,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:55:06,281 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:55:06,282 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:55:06,282 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-04-15 03:55:06,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508802189] [2021-04-15 03:55:06,282 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-04-15 03:55:06,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:55:06,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-04-15 03:55:06,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-04-15 03:55:06,283 INFO L87 Difference]: Start difference. First operand 737 states and 2420 transitions. Second operand has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 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) [2021-04-15 03:55:06,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:55:06,408 INFO L93 Difference]: Finished difference Result 1120 states and 3472 transitions. [2021-04-15 03:55:06,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-04-15 03:55:06,409 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 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 21 [2021-04-15 03:55:06,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:55:06,416 INFO L225 Difference]: With dead ends: 1120 [2021-04-15 03:55:06,416 INFO L226 Difference]: Without dead ends: 1120 [2021-04-15 03:55:06,418 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 77.3ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-04-15 03:55:06,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1120 states. [2021-04-15 03:55:06,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1120 to 810. [2021-04-15 03:55:06,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 810 states, 809 states have (on average 3.3325092707045734) internal successors, (2696), 809 states have internal predecessors, (2696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:55:06,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 810 states to 810 states and 2696 transitions. [2021-04-15 03:55:06,453 INFO L78 Accepts]: Start accepts. Automaton has 810 states and 2696 transitions. Word has length 21 [2021-04-15 03:55:06,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:55:06,454 INFO L480 AbstractCegarLoop]: Abstraction has 810 states and 2696 transitions. [2021-04-15 03:55:06,454 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 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) [2021-04-15 03:55:06,454 INFO L276 IsEmpty]: Start isEmpty. Operand 810 states and 2696 transitions. [2021-04-15 03:55:06,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 03:55:06,457 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:55:06,457 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:55:06,677 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-04-15 03:55:06,677 INFO L428 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:55:06,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:55:06,677 INFO L82 PathProgramCache]: Analyzing trace with hash -245591027, now seen corresponding path program 11 times [2021-04-15 03:55:06,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:55:06,678 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914473360] [2021-04-15 03:55:06,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:55:06,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:55:06,719 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:55:06,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914473360] [2021-04-15 03:55:06,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356357342] [2021-04-15 03:55:06,720 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 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 [2021-04-15 03:55:06,742 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-04-15 03:55:06,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:55:06,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 6 conjunts are in the unsatisfiable core [2021-04-15 03:55:06,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:55:06,813 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:55:06,813 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:55:06,813 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 8 [2021-04-15 03:55:06,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837720841] [2021-04-15 03:55:06,814 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-04-15 03:55:06,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:55:06,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-04-15 03:55:06,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-04-15 03:55:06,815 INFO L87 Difference]: Start difference. First operand 810 states and 2696 transitions. Second operand has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 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) [2021-04-15 03:55:06,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:55:06,924 INFO L93 Difference]: Finished difference Result 1340 states and 4210 transitions. [2021-04-15 03:55:06,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-04-15 03:55:06,924 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 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 21 [2021-04-15 03:55:06,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:55:06,932 INFO L225 Difference]: With dead ends: 1340 [2021-04-15 03:55:06,933 INFO L226 Difference]: Without dead ends: 1332 [2021-04-15 03:55:06,933 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 57.9ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-04-15 03:55:06,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1332 states. [2021-04-15 03:55:06,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1332 to 992. [2021-04-15 03:55:06,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 992 states, 991 states have (on average 3.375378405650858) internal successors, (3345), 991 states have internal predecessors, (3345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:55:06,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 992 states to 992 states and 3345 transitions. [2021-04-15 03:55:06,977 INFO L78 Accepts]: Start accepts. Automaton has 992 states and 3345 transitions. Word has length 21 [2021-04-15 03:55:06,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:55:06,977 INFO L480 AbstractCegarLoop]: Abstraction has 992 states and 3345 transitions. [2021-04-15 03:55:06,977 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 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) [2021-04-15 03:55:06,977 INFO L276 IsEmpty]: Start isEmpty. Operand 992 states and 3345 transitions. [2021-04-15 03:55:06,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 03:55:06,981 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:55:06,981 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:55:07,209 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-04-15 03:55:07,209 INFO L428 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:55:07,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:55:07,210 INFO L82 PathProgramCache]: Analyzing trace with hash -1657258739, now seen corresponding path program 12 times [2021-04-15 03:55:07,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:55:07,210 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321316566] [2021-04-15 03:55:07,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:55:07,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:55:07,258 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:55:07,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321316566] [2021-04-15 03:55:07,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459605083] [2021-04-15 03:55:07,258 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 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 [2021-04-15 03:55:07,282 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-04-15 03:55:07,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:55:07,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 6 conjunts are in the unsatisfiable core [2021-04-15 03:55:07,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:55:07,359 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:55:07,359 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:55:07,359 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2021-04-15 03:55:07,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778390182] [2021-04-15 03:55:07,360 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 03:55:07,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:55:07,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 03:55:07,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-04-15 03:55:07,361 INFO L87 Difference]: Start difference. First operand 992 states and 3345 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) [2021-04-15 03:55:07,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:55:07,557 INFO L93 Difference]: Finished difference Result 1623 states and 5234 transitions. [2021-04-15 03:55:07,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-04-15 03:55:07,557 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 21 [2021-04-15 03:55:07,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:55:07,584 INFO L225 Difference]: With dead ends: 1623 [2021-04-15 03:55:07,584 INFO L226 Difference]: Without dead ends: 1615 [2021-04-15 03:55:07,585 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 78.2ms TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-04-15 03:55:07,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1615 states. [2021-04-15 03:55:07,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1615 to 1215. [2021-04-15 03:55:07,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1215 states, 1214 states have (on average 3.383031301482702) internal successors, (4107), 1214 states have internal predecessors, (4107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:55:07,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1215 states to 1215 states and 4107 transitions. [2021-04-15 03:55:07,666 INFO L78 Accepts]: Start accepts. Automaton has 1215 states and 4107 transitions. Word has length 21 [2021-04-15 03:55:07,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:55:07,668 INFO L480 AbstractCegarLoop]: Abstraction has 1215 states and 4107 transitions. [2021-04-15 03:55:07,668 INFO L481 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) [2021-04-15 03:55:07,668 INFO L276 IsEmpty]: Start isEmpty. Operand 1215 states and 4107 transitions. [2021-04-15 03:55:07,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 03:55:07,674 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:55:07,674 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:55:07,893 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-04-15 03:55:07,893 INFO L428 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:55:07,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:55:07,894 INFO L82 PathProgramCache]: Analyzing trace with hash -372466675, now seen corresponding path program 13 times [2021-04-15 03:55:07,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:55:07,894 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713694801] [2021-04-15 03:55:07,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:55:07,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:55:07,929 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:55:07,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713694801] [2021-04-15 03:55:07,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875268754] [2021-04-15 03:55:07,929 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 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 [2021-04-15 03:55:07,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:55:07,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 6 conjunts are in the unsatisfiable core [2021-04-15 03:55:07,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:55:08,036 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:55:08,037 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:55:08,037 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 8 [2021-04-15 03:55:08,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727801091] [2021-04-15 03:55:08,037 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-04-15 03:55:08,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:55:08,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-04-15 03:55:08,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-04-15 03:55:08,038 INFO L87 Difference]: Start difference. First operand 1215 states and 4107 transitions. Second operand has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 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) [2021-04-15 03:55:08,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:55:08,200 INFO L93 Difference]: Finished difference Result 1527 states and 4890 transitions. [2021-04-15 03:55:08,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-04-15 03:55:08,201 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 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 21 [2021-04-15 03:55:08,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:55:08,208 INFO L225 Difference]: With dead ends: 1527 [2021-04-15 03:55:08,208 INFO L226 Difference]: Without dead ends: 1515 [2021-04-15 03:55:08,209 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 79.2ms TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-04-15 03:55:08,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1515 states. [2021-04-15 03:55:08,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1515 to 1211. [2021-04-15 03:55:08,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1211 states, 1210 states have (on average 3.3826446280991735) internal successors, (4093), 1210 states have internal predecessors, (4093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:55:08,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1211 states to 1211 states and 4093 transitions. [2021-04-15 03:55:08,263 INFO L78 Accepts]: Start accepts. Automaton has 1211 states and 4093 transitions. Word has length 21 [2021-04-15 03:55:08,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:55:08,263 INFO L480 AbstractCegarLoop]: Abstraction has 1211 states and 4093 transitions. [2021-04-15 03:55:08,264 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.5555555555555554) internal successors, (32), 8 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) [2021-04-15 03:55:08,264 INFO L276 IsEmpty]: Start isEmpty. Operand 1211 states and 4093 transitions. [2021-04-15 03:55:08,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 03:55:08,268 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:55:08,268 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:55:08,481 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-04-15 03:55:08,481 INFO L428 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:55:08,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:55:08,482 INFO L82 PathProgramCache]: Analyzing trace with hash 655355345, now seen corresponding path program 14 times [2021-04-15 03:55:08,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:55:08,482 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550547550] [2021-04-15 03:55:08,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:55:08,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:55:08,531 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:55:08,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550547550] [2021-04-15 03:55:08,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925267650] [2021-04-15 03:55:08,532 INFO L93 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 [2021-04-15 03:55:08,560 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 03:55:08,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:55:08,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 6 conjunts are in the unsatisfiable core [2021-04-15 03:55:08,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:55:08,628 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:55:08,628 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:55:08,628 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2021-04-15 03:55:08,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076765440] [2021-04-15 03:55:08,629 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 03:55:08,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:55:08,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 03:55:08,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-04-15 03:55:08,629 INFO L87 Difference]: Start difference. First operand 1211 states and 4093 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 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) [2021-04-15 03:55:08,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:55:08,841 INFO L93 Difference]: Finished difference Result 2197 states and 7082 transitions. [2021-04-15 03:55:08,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-04-15 03:55:08,842 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 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 21 [2021-04-15 03:55:08,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:55:08,851 INFO L225 Difference]: With dead ends: 2197 [2021-04-15 03:55:08,851 INFO L226 Difference]: Without dead ends: 2197 [2021-04-15 03:55:08,852 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 97.7ms TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2021-04-15 03:55:08,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2197 states. [2021-04-15 03:55:08,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2197 to 1448. [2021-04-15 03:55:08,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1448 states, 1447 states have (on average 3.4457498272287492) internal successors, (4986), 1447 states have internal predecessors, (4986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:55:08,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1448 states to 1448 states and 4986 transitions. [2021-04-15 03:55:08,907 INFO L78 Accepts]: Start accepts. Automaton has 1448 states and 4986 transitions. Word has length 21 [2021-04-15 03:55:08,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:55:08,907 INFO L480 AbstractCegarLoop]: Abstraction has 1448 states and 4986 transitions. [2021-04-15 03:55:08,907 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 9 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) [2021-04-15 03:55:08,907 INFO L276 IsEmpty]: Start isEmpty. Operand 1448 states and 4986 transitions. [2021-04-15 03:55:08,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 03:55:08,912 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:55:08,912 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:55:09,132 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-04-15 03:55:09,133 INFO L428 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:55:09,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:55:09,133 INFO L82 PathProgramCache]: Analyzing trace with hash 2086226193, now seen corresponding path program 15 times [2021-04-15 03:55:09,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:55:09,134 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426032961] [2021-04-15 03:55:09,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:55:09,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:55:09,162 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:55:09,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426032961] [2021-04-15 03:55:09,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789955164] [2021-04-15 03:55:09,163 INFO L93 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) [2021-04-15 03:55:09,190 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-04-15 03:55:09,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:55:09,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 6 conjunts are in the unsatisfiable core [2021-04-15 03:55:09,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:55:09,250 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:55:09,250 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:55:09,251 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 8 [2021-04-15 03:55:09,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5721144] [2021-04-15 03:55:09,251 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-04-15 03:55:09,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:55:09,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-04-15 03:55:09,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-04-15 03:55:09,252 INFO L87 Difference]: Start difference. First operand 1448 states and 4986 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) [2021-04-15 03:55:09,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:55:09,454 INFO L93 Difference]: Finished difference Result 1739 states and 5729 transitions. [2021-04-15 03:55:09,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-04-15 03:55:09,455 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 21 [2021-04-15 03:55:09,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:55:09,459 INFO L225 Difference]: With dead ends: 1739 [2021-04-15 03:55:09,459 INFO L226 Difference]: Without dead ends: 1693 [2021-04-15 03:55:09,459 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 114.6ms TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2021-04-15 03:55:09,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1693 states. [2021-04-15 03:55:09,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1693 to 1505. [2021-04-15 03:55:09,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1505 states, 1504 states have (on average 3.4095744680851063) internal successors, (5128), 1504 states have internal predecessors, (5128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:55:09,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1505 states to 1505 states and 5128 transitions. [2021-04-15 03:55:09,517 INFO L78 Accepts]: Start accepts. Automaton has 1505 states and 5128 transitions. Word has length 21 [2021-04-15 03:55:09,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:55:09,517 INFO L480 AbstractCegarLoop]: Abstraction has 1505 states and 5128 transitions. [2021-04-15 03:55:09,517 INFO L481 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) [2021-04-15 03:55:09,517 INFO L276 IsEmpty]: Start isEmpty. Operand 1505 states and 5128 transitions. [2021-04-15 03:55:09,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 03:55:09,521 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:55:09,521 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:55:09,742 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:55:09,742 INFO L428 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:55:09,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:55:09,743 INFO L82 PathProgramCache]: Analyzing trace with hash -1917770029, now seen corresponding path program 7 times [2021-04-15 03:55:09,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:55:09,743 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838106405] [2021-04-15 03:55:09,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:55:09,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:55:09,797 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 03:55:09,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838106405] [2021-04-15 03:55:09,798 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517187922] [2021-04-15 03:55:09,798 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2021-04-15 03:55:09,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:55:09,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 03:55:09,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:55:09,887 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 03:55:09,887 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:55:09,887 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-04-15 03:55:09,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245235377] [2021-04-15 03:55:09,888 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-04-15 03:55:09,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:55:09,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-04-15 03:55:09,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-04-15 03:55:09,888 INFO L87 Difference]: Start difference. First operand 1505 states and 5128 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:55:09,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:55:09,949 INFO L93 Difference]: Finished difference Result 1808 states and 5991 transitions. [2021-04-15 03:55:09,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-04-15 03:55:09,949 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 03:55:09,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:55:09,956 INFO L225 Difference]: With dead ends: 1808 [2021-04-15 03:55:09,956 INFO L226 Difference]: Without dead ends: 1787 [2021-04-15 03:55:09,957 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 37.8ms TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-04-15 03:55:09,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1787 states. [2021-04-15 03:55:09,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1787 to 1518. [2021-04-15 03:55:10,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1518 states, 1517 states have (on average 3.4225444957152273) internal successors, (5192), 1517 states have internal predecessors, (5192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:55:10,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1518 states to 1518 states and 5192 transitions. [2021-04-15 03:55:10,023 INFO L78 Accepts]: Start accepts. Automaton has 1518 states and 5192 transitions. Word has length 21 [2021-04-15 03:55:10,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:55:10,023 INFO L480 AbstractCegarLoop]: Abstraction has 1518 states and 5192 transitions. [2021-04-15 03:55:10,023 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:55:10,024 INFO L276 IsEmpty]: Start isEmpty. Operand 1518 states and 5192 transitions. [2021-04-15 03:55:10,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 03:55:10,037 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:55:10,037 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:55:10,257 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-04-15 03:55:10,257 INFO L428 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:55:10,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:55:10,257 INFO L82 PathProgramCache]: Analyzing trace with hash 1455409559, now seen corresponding path program 8 times [2021-04-15 03:55:10,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:55:10,257 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816211841] [2021-04-15 03:55:10,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:55:10,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:55:10,328 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 03:55:10,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816211841] [2021-04-15 03:55:10,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975242243] [2021-04-15 03:55:10,329 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_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) [2021-04-15 03:55:10,359 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 03:55:10,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:55:10,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 03:55:10,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:55:10,421 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 03:55:10,422 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:55:10,422 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-04-15 03:55:10,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283437010] [2021-04-15 03:55:10,422 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-04-15 03:55:10,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:55:10,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-04-15 03:55:10,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-04-15 03:55:10,425 INFO L87 Difference]: Start difference. First operand 1518 states and 5192 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:55:10,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:55:10,500 INFO L93 Difference]: Finished difference Result 1722 states and 5770 transitions. [2021-04-15 03:55:10,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-04-15 03:55:10,501 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 03:55:10,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:55:10,508 INFO L225 Difference]: With dead ends: 1722 [2021-04-15 03:55:10,508 INFO L226 Difference]: Without dead ends: 1701 [2021-04-15 03:55:10,510 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 50.5ms TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-04-15 03:55:10,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1701 states. [2021-04-15 03:55:10,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1701 to 1528. [2021-04-15 03:55:10,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1528 states, 1527 states have (on average 3.4282907662082516) internal successors, (5235), 1527 states have internal predecessors, (5235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:55:10,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1528 states to 1528 states and 5235 transitions. [2021-04-15 03:55:10,563 INFO L78 Accepts]: Start accepts. Automaton has 1528 states and 5235 transitions. Word has length 21 [2021-04-15 03:55:10,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:55:10,563 INFO L480 AbstractCegarLoop]: Abstraction has 1528 states and 5235 transitions. [2021-04-15 03:55:10,564 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:55:10,564 INFO L276 IsEmpty]: Start isEmpty. Operand 1528 states and 5235 transitions. [2021-04-15 03:55:10,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-04-15 03:55:10,568 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:55:10,569 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:55:10,784 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-04-15 03:55:10,785 INFO L428 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:55:10,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:55:10,785 INFO L82 PathProgramCache]: Analyzing trace with hash -355017005, now seen corresponding path program 9 times [2021-04-15 03:55:10,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:55:10,786 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748319542] [2021-04-15 03:55:10,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:55:10,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:55:10,855 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 03:55:10,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748319542] [2021-04-15 03:55:10,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272221821] [2021-04-15 03:55:10,855 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 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 [2021-04-15 03:55:10,881 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-04-15 03:55:10,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:55:10,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 03:55:10,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:55:10,940 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 03:55:10,940 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:55:10,940 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-04-15 03:55:10,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874148974] [2021-04-15 03:55:10,942 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-04-15 03:55:10,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:55:10,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-04-15 03:55:10,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-04-15 03:55:10,942 INFO L87 Difference]: Start difference. First operand 1528 states and 5235 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:55:11,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:55:11,003 INFO L93 Difference]: Finished difference Result 1802 states and 6001 transitions. [2021-04-15 03:55:11,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-04-15 03:55:11,003 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-04-15 03:55:11,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:55:11,010 INFO L225 Difference]: With dead ends: 1802 [2021-04-15 03:55:11,010 INFO L226 Difference]: Without dead ends: 1781 [2021-04-15 03:55:11,011 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 47.4ms TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-04-15 03:55:11,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1781 states. [2021-04-15 03:55:11,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1781 to 1544. [2021-04-15 03:55:11,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1544 states, 1543 states have (on average 3.436811406351264) internal successors, (5303), 1543 states have internal predecessors, (5303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:55:11,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1544 states to 1544 states and 5303 transitions. [2021-04-15 03:55:11,061 INFO L78 Accepts]: Start accepts. Automaton has 1544 states and 5303 transitions. Word has length 21 [2021-04-15 03:55:11,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:55:11,061 INFO L480 AbstractCegarLoop]: Abstraction has 1544 states and 5303 transitions. [2021-04-15 03:55:11,061 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 5 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:55:11,061 INFO L276 IsEmpty]: Start isEmpty. Operand 1544 states and 5303 transitions. [2021-04-15 03:55:11,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-04-15 03:55:11,067 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:55:11,067 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:55:11,292 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:55:11,293 INFO L428 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:55:11,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:55:11,294 INFO L82 PathProgramCache]: Analyzing trace with hash -343789315, now seen corresponding path program 10 times [2021-04-15 03:55:11,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:55:11,294 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626704300] [2021-04-15 03:55:11,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:55:11,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:55:11,339 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:55:11,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626704300] [2021-04-15 03:55:11,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039237983] [2021-04-15 03:55:11,339 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-15 03:55:11,363 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 03:55:11,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:55:11,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 03:55:11,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:55:11,474 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:55:11,475 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:55:11,475 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-04-15 03:55:11,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896721149] [2021-04-15 03:55:11,475 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 03:55:11,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:55:11,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 03:55:11,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-04-15 03:55:11,476 INFO L87 Difference]: Start difference. First operand 1544 states and 5303 transitions. Second operand has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 10 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) [2021-04-15 03:55:11,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:55:11,688 INFO L93 Difference]: Finished difference Result 4383 states and 14962 transitions. [2021-04-15 03:55:11,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-04-15 03:55:11,697 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 10 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 23 [2021-04-15 03:55:11,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:55:11,721 INFO L225 Difference]: With dead ends: 4383 [2021-04-15 03:55:11,721 INFO L226 Difference]: Without dead ends: 4383 [2021-04-15 03:55:11,722 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 130.8ms TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2021-04-15 03:55:11,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4383 states. [2021-04-15 03:55:11,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4383 to 2776. [2021-04-15 03:55:11,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2776 states, 2775 states have (on average 3.546666666666667) internal successors, (9842), 2775 states have internal predecessors, (9842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:55:11,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2776 states to 2776 states and 9842 transitions. [2021-04-15 03:55:11,842 INFO L78 Accepts]: Start accepts. Automaton has 2776 states and 9842 transitions. Word has length 23 [2021-04-15 03:55:11,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:55:11,843 INFO L480 AbstractCegarLoop]: Abstraction has 2776 states and 9842 transitions. [2021-04-15 03:55:11,843 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 10 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) [2021-04-15 03:55:11,843 INFO L276 IsEmpty]: Start isEmpty. Operand 2776 states and 9842 transitions. [2021-04-15 03:55:11,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-04-15 03:55:11,851 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:55:11,851 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:55:12,076 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:55:12,077 INFO L428 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:55:12,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:55:12,077 INFO L82 PathProgramCache]: Analyzing trace with hash -1351897977, now seen corresponding path program 1 times [2021-04-15 03:55:12,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:55:12,078 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677183839] [2021-04-15 03:55:12,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:55:12,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:55:12,121 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:55:12,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677183839] [2021-04-15 03:55:12,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847074159] [2021-04-15 03:55:12,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-04-15 03:55:12,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:55:12,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 03:55:12,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:55:12,243 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:55:12,243 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:55:12,243 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-04-15 03:55:12,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882570243] [2021-04-15 03:55:12,244 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 03:55:12,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:55:12,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 03:55:12,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-04-15 03:55:12,245 INFO L87 Difference]: Start difference. First operand 2776 states and 9842 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 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) [2021-04-15 03:55:12,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:55:12,477 INFO L93 Difference]: Finished difference Result 6576 states and 23416 transitions. [2021-04-15 03:55:12,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-04-15 03:55:12,478 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 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 23 [2021-04-15 03:55:12,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:55:12,514 INFO L225 Difference]: With dead ends: 6576 [2021-04-15 03:55:12,514 INFO L226 Difference]: Without dead ends: 6576 [2021-04-15 03:55:12,516 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 125.9ms TimeCoverageRelationStatistics Valid=102, Invalid=204, Unknown=0, NotChecked=0, Total=306 [2021-04-15 03:55:12,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6576 states. [2021-04-15 03:55:12,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6576 to 4642. [2021-04-15 03:55:12,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4642 states, 4641 states have (on average 3.6181857358327947) internal successors, (16792), 4641 states have internal predecessors, (16792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:55:12,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4642 states to 4642 states and 16792 transitions. [2021-04-15 03:55:12,777 INFO L78 Accepts]: Start accepts. Automaton has 4642 states and 16792 transitions. Word has length 23 [2021-04-15 03:55:12,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:55:12,778 INFO L480 AbstractCegarLoop]: Abstraction has 4642 states and 16792 transitions. [2021-04-15 03:55:12,778 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 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) [2021-04-15 03:55:12,778 INFO L276 IsEmpty]: Start isEmpty. Operand 4642 states and 16792 transitions. [2021-04-15 03:55:12,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-04-15 03:55:12,793 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:55:12,794 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:55:13,009 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-04-15 03:55:13,009 INFO L428 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:55:13,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:55:13,010 INFO L82 PathProgramCache]: Analyzing trace with hash -1067499911, now seen corresponding path program 11 times [2021-04-15 03:55:13,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:55:13,010 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633700363] [2021-04-15 03:55:13,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:55:13,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:55:13,043 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:55:13,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633700363] [2021-04-15 03:55:13,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295656928] [2021-04-15 03:55:13,044 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 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 [2021-04-15 03:55:13,067 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-04-15 03:55:13,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:55:13,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 03:55:13,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:55:13,166 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:55:13,166 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:55:13,166 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-04-15 03:55:13,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999803625] [2021-04-15 03:55:13,167 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 03:55:13,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:55:13,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 03:55:13,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-04-15 03:55:13,170 INFO L87 Difference]: Start difference. First operand 4642 states and 16792 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 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) [2021-04-15 03:55:13,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:55:13,381 INFO L93 Difference]: Finished difference Result 6297 states and 22107 transitions. [2021-04-15 03:55:13,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-04-15 03:55:13,381 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 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 [2021-04-15 03:55:13,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:55:13,413 INFO L225 Difference]: With dead ends: 6297 [2021-04-15 03:55:13,414 INFO L226 Difference]: Without dead ends: 6289 [2021-04-15 03:55:13,416 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 113.6ms TimeCoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2021-04-15 03:55:13,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6289 states. [2021-04-15 03:55:13,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6289 to 5484. [2021-04-15 03:55:13,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5484 states, 5483 states have (on average 3.6122560641984314) internal successors, (19806), 5483 states have internal predecessors, (19806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:55:13,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5484 states to 5484 states and 19806 transitions. [2021-04-15 03:55:13,634 INFO L78 Accepts]: Start accepts. Automaton has 5484 states and 19806 transitions. Word has length 23 [2021-04-15 03:55:13,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:55:13,634 INFO L480 AbstractCegarLoop]: Abstraction has 5484 states and 19806 transitions. [2021-04-15 03:55:13,634 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 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) [2021-04-15 03:55:13,634 INFO L276 IsEmpty]: Start isEmpty. Operand 5484 states and 19806 transitions. [2021-04-15 03:55:13,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-04-15 03:55:13,651 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:55:13,651 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:55:13,865 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:55:13,865 INFO L428 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:55:13,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:55:13,866 INFO L82 PathProgramCache]: Analyzing trace with hash 1815799673, now seen corresponding path program 2 times [2021-04-15 03:55:13,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:55:13,866 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002878676] [2021-04-15 03:55:13,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:55:13,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:55:13,908 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:55:13,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002878676] [2021-04-15 03:55:13,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362389739] [2021-04-15 03:55:13,909 INFO L93 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 [2021-04-15 03:55:13,939 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 03:55:13,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:55:13,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 03:55:13,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:55:14,019 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:55:14,019 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:55:14,020 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-04-15 03:55:14,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851227531] [2021-04-15 03:55:14,020 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 03:55:14,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:55:14,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 03:55:14,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-04-15 03:55:14,021 INFO L87 Difference]: Start difference. First operand 5484 states and 19806 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 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) [2021-04-15 03:55:14,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:55:14,339 INFO L93 Difference]: Finished difference Result 8906 states and 31694 transitions. [2021-04-15 03:55:14,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-04-15 03:55:14,340 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 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 [2021-04-15 03:55:14,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:55:14,385 INFO L225 Difference]: With dead ends: 8906 [2021-04-15 03:55:14,385 INFO L226 Difference]: Without dead ends: 8900 [2021-04-15 03:55:14,386 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 121.1ms TimeCoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2021-04-15 03:55:14,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8900 states. [2021-04-15 03:55:14,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8900 to 8072. [2021-04-15 03:55:14,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8072 states, 8071 states have (on average 3.62644034196506) internal successors, (29269), 8071 states have internal predecessors, (29269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:55:14,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8072 states to 8072 states and 29269 transitions. [2021-04-15 03:55:14,676 INFO L78 Accepts]: Start accepts. Automaton has 8072 states and 29269 transitions. Word has length 23 [2021-04-15 03:55:14,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:55:14,676 INFO L480 AbstractCegarLoop]: Abstraction has 8072 states and 29269 transitions. [2021-04-15 03:55:14,676 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 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) [2021-04-15 03:55:14,676 INFO L276 IsEmpty]: Start isEmpty. Operand 8072 states and 29269 transitions. [2021-04-15 03:55:14,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-04-15 03:55:14,701 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:55:14,701 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:55:14,928 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-04-15 03:55:14,928 INFO L428 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:55:14,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:55:14,929 INFO L82 PathProgramCache]: Analyzing trace with hash -1500610179, now seen corresponding path program 3 times [2021-04-15 03:55:14,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:55:14,929 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174723924] [2021-04-15 03:55:14,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:55:14,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:55:14,974 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:55:14,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174723924] [2021-04-15 03:55:14,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122072578] [2021-04-15 03:55:14,975 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 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 [2021-04-15 03:55:14,997 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-04-15 03:55:14,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:55:14,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 03:55:14,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:55:15,078 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:55:15,079 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:55:15,079 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-04-15 03:55:15,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624983422] [2021-04-15 03:55:15,079 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 03:55:15,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:55:15,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 03:55:15,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-04-15 03:55:15,080 INFO L87 Difference]: Start difference. First operand 8072 states and 29269 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 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) [2021-04-15 03:55:15,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:55:15,357 INFO L93 Difference]: Finished difference Result 12359 states and 43995 transitions. [2021-04-15 03:55:15,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-04-15 03:55:15,358 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 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 [2021-04-15 03:55:15,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:55:15,403 INFO L225 Difference]: With dead ends: 12359 [2021-04-15 03:55:15,403 INFO L226 Difference]: Without dead ends: 12359 [2021-04-15 03:55:15,404 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 113.6ms TimeCoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2021-04-15 03:55:15,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12359 states. [2021-04-15 03:55:15,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12359 to 11076. [2021-04-15 03:55:15,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11076 states, 11075 states have (on average 3.61941309255079) internal successors, (40085), 11075 states have internal predecessors, (40085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:55:16,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11076 states to 11076 states and 40085 transitions. [2021-04-15 03:55:16,005 INFO L78 Accepts]: Start accepts. Automaton has 11076 states and 40085 transitions. Word has length 23 [2021-04-15 03:55:16,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:55:16,005 INFO L480 AbstractCegarLoop]: Abstraction has 11076 states and 40085 transitions. [2021-04-15 03:55:16,005 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 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) [2021-04-15 03:55:16,006 INFO L276 IsEmpty]: Start isEmpty. Operand 11076 states and 40085 transitions. [2021-04-15 03:55:16,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-04-15 03:55:16,055 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:55:16,055 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:55:16,255 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:55:16,255 INFO L428 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:55:16,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:55:16,256 INFO L82 PathProgramCache]: Analyzing trace with hash -1194375559, now seen corresponding path program 12 times [2021-04-15 03:55:16,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:55:16,256 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780712278] [2021-04-15 03:55:16,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:55:16,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:55:16,342 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:55:16,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780712278] [2021-04-15 03:55:16,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976586068] [2021-04-15 03:55:16,343 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2021-04-15 03:55:16,371 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-04-15 03:55:16,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:55:16,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 03:55:16,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:55:16,485 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:55:16,486 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:55:16,486 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-04-15 03:55:16,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501886957] [2021-04-15 03:55:16,486 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 03:55:16,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:55:16,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 03:55:16,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-04-15 03:55:16,487 INFO L87 Difference]: Start difference. First operand 11076 states and 40085 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 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) [2021-04-15 03:55:16,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:55:16,788 INFO L93 Difference]: Finished difference Result 11482 states and 41093 transitions. [2021-04-15 03:55:16,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-04-15 03:55:16,788 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 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 [2021-04-15 03:55:16,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:55:16,840 INFO L225 Difference]: With dead ends: 11482 [2021-04-15 03:55:16,841 INFO L226 Difference]: Without dead ends: 11472 [2021-04-15 03:55:16,841 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 108.6ms TimeCoverageRelationStatistics Valid=80, Invalid=130, Unknown=0, NotChecked=0, Total=210 [2021-04-15 03:55:16,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11472 states. [2021-04-15 03:55:17,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11472 to 11074. [2021-04-15 03:55:17,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11074 states, 11073 states have (on average 3.6193443511243566) internal successors, (40077), 11073 states have internal predecessors, (40077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:55:17,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11074 states to 11074 states and 40077 transitions. [2021-04-15 03:55:17,284 INFO L78 Accepts]: Start accepts. Automaton has 11074 states and 40077 transitions. Word has length 23 [2021-04-15 03:55:17,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:55:17,284 INFO L480 AbstractCegarLoop]: Abstraction has 11074 states and 40077 transitions. [2021-04-15 03:55:17,284 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 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) [2021-04-15 03:55:17,284 INFO L276 IsEmpty]: Start isEmpty. Operand 11074 states and 40077 transitions. [2021-04-15 03:55:17,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-04-15 03:55:17,315 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:55:17,316 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:55:17,535 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-04-15 03:55:17,535 INFO L428 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:55:17,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:55:17,535 INFO L82 PathProgramCache]: Analyzing trace with hash 713885521, now seen corresponding path program 4 times [2021-04-15 03:55:17,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:55:17,536 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835755339] [2021-04-15 03:55:17,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:55:17,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:55:17,580 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:55:17,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835755339] [2021-04-15 03:55:17,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628299929] [2021-04-15 03:55:17,581 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-15 03:55:17,620 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 03:55:17,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:55:17,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 03:55:17,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:55:17,694 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:55:17,694 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:55:17,694 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-04-15 03:55:17,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867009036] [2021-04-15 03:55:17,695 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 03:55:17,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:55:17,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 03:55:17,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-04-15 03:55:17,696 INFO L87 Difference]: Start difference. First operand 11074 states and 40077 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 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) [2021-04-15 03:55:18,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:55:18,050 INFO L93 Difference]: Finished difference Result 16493 states and 59103 transitions. [2021-04-15 03:55:18,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-04-15 03:55:18,051 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 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 [2021-04-15 03:55:18,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:55:18,129 INFO L225 Difference]: With dead ends: 16493 [2021-04-15 03:55:18,129 INFO L226 Difference]: Without dead ends: 16493 [2021-04-15 03:55:18,130 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 103.3ms TimeCoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2021-04-15 03:55:18,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16493 states. [2021-04-15 03:55:18,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16493 to 7965. [2021-04-15 03:55:18,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7965 states, 7964 states have (on average 3.605474635861376) internal successors, (28714), 7964 states have internal predecessors, (28714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:55:18,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7965 states to 7965 states and 28714 transitions. [2021-04-15 03:55:18,520 INFO L78 Accepts]: Start accepts. Automaton has 7965 states and 28714 transitions. Word has length 23 [2021-04-15 03:55:18,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:55:18,520 INFO L480 AbstractCegarLoop]: Abstraction has 7965 states and 28714 transitions. [2021-04-15 03:55:18,520 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 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) [2021-04-15 03:55:18,520 INFO L276 IsEmpty]: Start isEmpty. Operand 7965 states and 28714 transitions. [2021-04-15 03:55:18,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-04-15 03:55:18,541 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:55:18,541 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:55:18,741 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-04-15 03:55:18,742 INFO L428 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:55:18,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:55:18,742 INFO L82 PathProgramCache]: Analyzing trace with hash 1264317309, now seen corresponding path program 13 times [2021-04-15 03:55:18,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:55:18,742 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163739564] [2021-04-15 03:55:18,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:55:18,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:55:18,778 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:55:18,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163739564] [2021-04-15 03:55:18,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660997275] [2021-04-15 03:55:18,779 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2021-04-15 03:55:18,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:55:18,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 03:55:18,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:55:18,879 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:55:18,879 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:55:18,879 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-04-15 03:55:18,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292843069] [2021-04-15 03:55:18,880 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 03:55:18,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:55:18,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 03:55:18,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-04-15 03:55:18,881 INFO L87 Difference]: Start difference. First operand 7965 states and 28714 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) [2021-04-15 03:55:19,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:55:19,137 INFO L93 Difference]: Finished difference Result 8444 states and 29934 transitions. [2021-04-15 03:55:19,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-04-15 03:55:19,138 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 23 [2021-04-15 03:55:19,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:55:19,166 INFO L225 Difference]: With dead ends: 8444 [2021-04-15 03:55:19,166 INFO L226 Difference]: Without dead ends: 8414 [2021-04-15 03:55:19,167 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 120.3ms TimeCoverageRelationStatistics Valid=106, Invalid=200, Unknown=0, NotChecked=0, Total=306 [2021-04-15 03:55:19,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8414 states. [2021-04-15 03:55:19,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8414 to 7984. [2021-04-15 03:55:19,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7984 states, 7983 states have (on average 3.5968933984717526) internal successors, (28714), 7983 states have internal predecessors, (28714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:55:19,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7984 states to 7984 states and 28714 transitions. [2021-04-15 03:55:19,473 INFO L78 Accepts]: Start accepts. Automaton has 7984 states and 28714 transitions. Word has length 23 [2021-04-15 03:55:19,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:55:19,473 INFO L480 AbstractCegarLoop]: Abstraction has 7984 states and 28714 transitions. [2021-04-15 03:55:19,473 INFO L481 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) [2021-04-15 03:55:19,473 INFO L276 IsEmpty]: Start isEmpty. Operand 7984 states and 28714 transitions. [2021-04-15 03:55:19,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-04-15 03:55:19,496 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:55:19,496 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:55:19,696 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-04-15 03:55:19,696 INFO L428 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:55:19,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:55:19,697 INFO L82 PathProgramCache]: Analyzing trace with hash -541652355, now seen corresponding path program 14 times [2021-04-15 03:55:19,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:55:19,697 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026675339] [2021-04-15 03:55:19,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:55:19,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:55:19,743 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:55:19,743 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026675339] [2021-04-15 03:55:19,743 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421730918] [2021-04-15 03:55:19,743 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-15 03:55:19,766 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 03:55:19,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:55:19,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 03:55:19,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:55:19,856 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:55:19,856 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:55:19,856 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2021-04-15 03:55:19,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509690371] [2021-04-15 03:55:19,857 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 03:55:19,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:55:19,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 03:55:19,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-04-15 03:55:19,858 INFO L87 Difference]: Start difference. First operand 7984 states and 28714 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) [2021-04-15 03:55:20,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:55:20,130 INFO L93 Difference]: Finished difference Result 8606 states and 30521 transitions. [2021-04-15 03:55:20,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-04-15 03:55:20,130 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 23 [2021-04-15 03:55:20,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:55:20,158 INFO L225 Difference]: With dead ends: 8606 [2021-04-15 03:55:20,158 INFO L226 Difference]: Without dead ends: 8543 [2021-04-15 03:55:20,158 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 144.3ms TimeCoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2021-04-15 03:55:20,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8543 states. [2021-04-15 03:55:20,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8543 to 8052. [2021-04-15 03:55:20,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8052 states, 8051 states have (on average 3.5914793193392125) internal successors, (28915), 8051 states have internal predecessors, (28915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:55:20,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8052 states to 8052 states and 28915 transitions. [2021-04-15 03:55:20,383 INFO L78 Accepts]: Start accepts. Automaton has 8052 states and 28915 transitions. Word has length 23 [2021-04-15 03:55:20,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:55:20,383 INFO L480 AbstractCegarLoop]: Abstraction has 8052 states and 28915 transitions. [2021-04-15 03:55:20,383 INFO L481 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) [2021-04-15 03:55:20,383 INFO L276 IsEmpty]: Start isEmpty. Operand 8052 states and 28915 transitions. [2021-04-15 03:55:20,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-04-15 03:55:20,400 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:55:20,400 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:55:20,600 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-04-15 03:55:20,601 INFO L428 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:55:20,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:55:20,601 INFO L82 PathProgramCache]: Analyzing trace with hash 732469559, now seen corresponding path program 5 times [2021-04-15 03:55:20,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:55:20,601 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730191934] [2021-04-15 03:55:20,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:55:20,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:55:20,708 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:55:20,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730191934] [2021-04-15 03:55:20,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593144671] [2021-04-15 03:55:20,708 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-15 03:55:20,736 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-04-15 03:55:20,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:55:20,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2021-04-15 03:55:20,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:55:20,912 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:55:20,913 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:55:20,913 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-04-15 03:55:20,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177628198] [2021-04-15 03:55:20,913 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 03:55:20,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:55:20,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 03:55:20,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-04-15 03:55:20,914 INFO L87 Difference]: Start difference. First operand 8052 states and 28915 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 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) [2021-04-15 03:55:21,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:55:21,126 INFO L93 Difference]: Finished difference Result 8205 states and 29288 transitions. [2021-04-15 03:55:21,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-04-15 03:55:21,127 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 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 [2021-04-15 03:55:21,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:55:21,161 INFO L225 Difference]: With dead ends: 8205 [2021-04-15 03:55:21,161 INFO L226 Difference]: Without dead ends: 8172 [2021-04-15 03:55:21,162 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 199.6ms TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-04-15 03:55:21,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8172 states. [2021-04-15 03:55:21,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8172 to 8077. [2021-04-15 03:55:21,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8077 states, 8076 states have (on average 3.5898959881129273) internal successors, (28992), 8076 states have internal predecessors, (28992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:55:21,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8077 states to 8077 states and 28992 transitions. [2021-04-15 03:55:21,407 INFO L78 Accepts]: Start accepts. Automaton has 8077 states and 28992 transitions. Word has length 23 [2021-04-15 03:55:21,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:55:21,407 INFO L480 AbstractCegarLoop]: Abstraction has 8077 states and 28992 transitions. [2021-04-15 03:55:21,407 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 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) [2021-04-15 03:55:21,407 INFO L276 IsEmpty]: Start isEmpty. Operand 8077 states and 28992 transitions. [2021-04-15 03:55:21,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-04-15 03:55:21,425 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:55:21,425 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:55:21,625 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-04-15 03:55:21,626 INFO L428 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:55:21,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:55:21,626 INFO L82 PathProgramCache]: Analyzing trace with hash -66570445, now seen corresponding path program 6 times [2021-04-15 03:55:21,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:55:21,626 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354821319] [2021-04-15 03:55:21,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:55:21,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:55:21,716 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:55:21,716 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354821319] [2021-04-15 03:55:21,716 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795101469] [2021-04-15 03:55:21,716 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2021-04-15 03:55:21,736 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-04-15 03:55:21,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:55:21,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2021-04-15 03:55:21,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:55:21,961 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:55:21,962 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:55:21,962 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-04-15 03:55:21,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47871918] [2021-04-15 03:55:21,962 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 03:55:21,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:55:21,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 03:55:21,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-04-15 03:55:21,963 INFO L87 Difference]: Start difference. First operand 8077 states and 28992 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 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) [2021-04-15 03:55:22,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:55:22,195 INFO L93 Difference]: Finished difference Result 10295 states and 36666 transitions. [2021-04-15 03:55:22,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-04-15 03:55:22,195 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 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 [2021-04-15 03:55:22,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:55:22,228 INFO L225 Difference]: With dead ends: 10295 [2021-04-15 03:55:22,228 INFO L226 Difference]: Without dead ends: 10247 [2021-04-15 03:55:22,228 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 201.2ms TimeCoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2021-04-15 03:55:22,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10247 states. [2021-04-15 03:55:22,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10247 to 8072. [2021-04-15 03:55:22,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8072 states, 8071 states have (on average 3.5903853301945237) internal successors, (28978), 8071 states have internal predecessors, (28978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:55:22,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8072 states to 8072 states and 28978 transitions. [2021-04-15 03:55:22,464 INFO L78 Accepts]: Start accepts. Automaton has 8072 states and 28978 transitions. Word has length 23 [2021-04-15 03:55:22,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:55:22,464 INFO L480 AbstractCegarLoop]: Abstraction has 8072 states and 28978 transitions. [2021-04-15 03:55:22,464 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 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) [2021-04-15 03:55:22,464 INFO L276 IsEmpty]: Start isEmpty. Operand 8072 states and 28978 transitions. [2021-04-15 03:55:22,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-04-15 03:55:22,480 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:55:22,481 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:55:22,681 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-04-15 03:55:22,681 INFO L428 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:55:22,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:55:22,682 INFO L82 PathProgramCache]: Analyzing trace with hash -147969501, now seen corresponding path program 7 times [2021-04-15 03:55:22,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:55:22,682 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095329321] [2021-04-15 03:55:22,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:55:22,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:55:22,789 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:55:22,789 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095329321] [2021-04-15 03:55:22,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225838937] [2021-04-15 03:55:22,790 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2021-04-15 03:55:22,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:55:22,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2021-04-15 03:55:22,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:55:23,013 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:55:23,013 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:55:23,014 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-04-15 03:55:23,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530709948] [2021-04-15 03:55:23,014 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 03:55:23,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:55:23,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 03:55:23,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-04-15 03:55:23,015 INFO L87 Difference]: Start difference. First operand 8072 states and 28978 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 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) [2021-04-15 03:55:23,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:55:23,320 INFO L93 Difference]: Finished difference Result 10743 states and 38081 transitions. [2021-04-15 03:55:23,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-04-15 03:55:23,321 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 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 [2021-04-15 03:55:23,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:55:23,353 INFO L225 Difference]: With dead ends: 10743 [2021-04-15 03:55:23,353 INFO L226 Difference]: Without dead ends: 10695 [2021-04-15 03:55:23,354 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 192.3ms TimeCoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2021-04-15 03:55:23,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10695 states. [2021-04-15 03:55:23,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10695 to 8069. [2021-04-15 03:55:23,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8069 states, 8068 states have (on average 3.5909766980664353) internal successors, (28972), 8068 states have internal predecessors, (28972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:55:23,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8069 states to 8069 states and 28972 transitions. [2021-04-15 03:55:23,569 INFO L78 Accepts]: Start accepts. Automaton has 8069 states and 28972 transitions. Word has length 23 [2021-04-15 03:55:23,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:55:23,569 INFO L480 AbstractCegarLoop]: Abstraction has 8069 states and 28972 transitions. [2021-04-15 03:55:23,569 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 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) [2021-04-15 03:55:23,569 INFO L276 IsEmpty]: Start isEmpty. Operand 8069 states and 28972 transitions. [2021-04-15 03:55:23,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-04-15 03:55:23,586 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:55:23,586 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:55:23,800 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-04-15 03:55:23,801 INFO L428 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:55:23,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:55:23,801 INFO L82 PathProgramCache]: Analyzing trace with hash 265646431, now seen corresponding path program 8 times [2021-04-15 03:55:23,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:55:23,801 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040139763] [2021-04-15 03:55:23,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:55:23,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:55:23,890 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:55:23,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040139763] [2021-04-15 03:55:23,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812363542] [2021-04-15 03:55:23,890 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 03:55:23,927 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 03:55:23,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:55:23,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2021-04-15 03:55:23,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:55:24,083 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:55:24,083 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:55:24,083 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-04-15 03:55:24,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578965389] [2021-04-15 03:55:24,084 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 03:55:24,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:55:24,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 03:55:24,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-04-15 03:55:24,085 INFO L87 Difference]: Start difference. First operand 8069 states and 28972 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 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) [2021-04-15 03:55:24,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:55:24,506 INFO L93 Difference]: Finished difference Result 10785 states and 38212 transitions. [2021-04-15 03:55:24,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-04-15 03:55:24,508 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 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 [2021-04-15 03:55:24,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:55:24,557 INFO L225 Difference]: With dead ends: 10785 [2021-04-15 03:55:24,557 INFO L226 Difference]: Without dead ends: 10737 [2021-04-15 03:55:24,559 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 315.8ms TimeCoverageRelationStatistics Valid=117, Invalid=303, Unknown=0, NotChecked=0, Total=420 [2021-04-15 03:55:24,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10737 states. [2021-04-15 03:55:24,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10737 to 8068. [2021-04-15 03:55:24,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8068 states, 8067 states have (on average 3.591421842072642) internal successors, (28972), 8067 states have internal predecessors, (28972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:55:24,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8068 states to 8068 states and 28972 transitions. [2021-04-15 03:55:24,846 INFO L78 Accepts]: Start accepts. Automaton has 8068 states and 28972 transitions. Word has length 23 [2021-04-15 03:55:24,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:55:24,849 INFO L480 AbstractCegarLoop]: Abstraction has 8068 states and 28972 transitions. [2021-04-15 03:55:24,849 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 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) [2021-04-15 03:55:24,849 INFO L276 IsEmpty]: Start isEmpty. Operand 8068 states and 28972 transitions. [2021-04-15 03:55:24,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-04-15 03:55:24,872 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:55:24,872 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:55:25,084 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-04-15 03:55:25,085 INFO L428 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:55:25,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:55:25,085 INFO L82 PathProgramCache]: Analyzing trace with hash -418348287, now seen corresponding path program 9 times [2021-04-15 03:55:25,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:55:25,086 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864874719] [2021-04-15 03:55:25,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:55:25,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:55:25,167 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:55:25,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864874719] [2021-04-15 03:55:25,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313359099] [2021-04-15 03:55:25,167 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 03:55:25,195 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-04-15 03:55:25,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:55:25,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2021-04-15 03:55:25,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:55:25,311 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:55:25,311 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:55:25,311 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-04-15 03:55:25,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59334233] [2021-04-15 03:55:25,314 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 03:55:25,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:55:25,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 03:55:25,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-04-15 03:55:25,315 INFO L87 Difference]: Start difference. First operand 8068 states and 28972 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 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) [2021-04-15 03:55:25,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:55:25,551 INFO L93 Difference]: Finished difference Result 8314 states and 29600 transitions. [2021-04-15 03:55:25,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-04-15 03:55:25,551 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 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 [2021-04-15 03:55:25,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:55:25,579 INFO L225 Difference]: With dead ends: 8314 [2021-04-15 03:55:25,579 INFO L226 Difference]: Without dead ends: 8255 [2021-04-15 03:55:25,580 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 127.7ms TimeCoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-04-15 03:55:25,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8255 states. [2021-04-15 03:55:25,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8255 to 8137. [2021-04-15 03:55:25,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8137 states, 8136 states have (on average 3.587266470009833) internal successors, (29186), 8136 states have internal predecessors, (29186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:55:25,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8137 states to 8137 states and 29186 transitions. [2021-04-15 03:55:25,776 INFO L78 Accepts]: Start accepts. Automaton has 8137 states and 29186 transitions. Word has length 23 [2021-04-15 03:55:25,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:55:25,777 INFO L480 AbstractCegarLoop]: Abstraction has 8137 states and 29186 transitions. [2021-04-15 03:55:25,777 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 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) [2021-04-15 03:55:25,777 INFO L276 IsEmpty]: Start isEmpty. Operand 8137 states and 29186 transitions. [2021-04-15 03:55:25,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-04-15 03:55:25,793 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:55:25,793 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:55:26,012 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-04-15 03:55:26,013 INFO L428 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:55:26,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:55:26,013 INFO L82 PathProgramCache]: Analyzing trace with hash -1217388291, now seen corresponding path program 10 times [2021-04-15 03:55:26,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:55:26,013 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016051838] [2021-04-15 03:55:26,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:55:26,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:55:26,086 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:55:26,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016051838] [2021-04-15 03:55:26,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209573661] [2021-04-15 03:55:26,087 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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 [2021-04-15 03:55:26,114 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 03:55:26,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:55:26,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2021-04-15 03:55:26,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:55:26,256 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:55:26,256 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:55:26,256 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-04-15 03:55:26,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799628173] [2021-04-15 03:55:26,257 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 03:55:26,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:55:26,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 03:55:26,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-04-15 03:55:26,257 INFO L87 Difference]: Start difference. First operand 8137 states and 29186 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 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) [2021-04-15 03:55:26,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:55:26,472 INFO L93 Difference]: Finished difference Result 10367 states and 36899 transitions. [2021-04-15 03:55:26,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-04-15 03:55:26,473 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 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 [2021-04-15 03:55:26,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:55:26,505 INFO L225 Difference]: With dead ends: 10367 [2021-04-15 03:55:26,505 INFO L226 Difference]: Without dead ends: 10321 [2021-04-15 03:55:26,505 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 147.2ms TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-04-15 03:55:26,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10321 states. [2021-04-15 03:55:26,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10321 to 8140. [2021-04-15 03:55:26,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8140 states, 8139 states have (on average 3.5897530409141174) internal successors, (29217), 8139 states have internal predecessors, (29217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:55:26,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8140 states to 8140 states and 29217 transitions. [2021-04-15 03:55:26,735 INFO L78 Accepts]: Start accepts. Automaton has 8140 states and 29217 transitions. Word has length 23 [2021-04-15 03:55:26,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:55:26,735 INFO L480 AbstractCegarLoop]: Abstraction has 8140 states and 29217 transitions. [2021-04-15 03:55:26,736 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 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) [2021-04-15 03:55:26,736 INFO L276 IsEmpty]: Start isEmpty. Operand 8140 states and 29217 transitions. [2021-04-15 03:55:26,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-04-15 03:55:26,753 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:55:26,753 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:55:26,954 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:55:26,954 INFO L428 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:55:26,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:55:26,955 INFO L82 PathProgramCache]: Analyzing trace with hash -1298787347, now seen corresponding path program 11 times [2021-04-15 03:55:26,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:55:26,955 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124789263] [2021-04-15 03:55:26,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:55:26,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:55:27,038 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:55:27,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124789263] [2021-04-15 03:55:27,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408835705] [2021-04-15 03:55:27,038 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_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 [2021-04-15 03:55:27,062 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 03:55:27,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:55:27,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2021-04-15 03:55:27,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:55:27,216 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:55:27,217 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:55:27,217 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-04-15 03:55:27,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815300417] [2021-04-15 03:55:27,217 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 03:55:27,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:55:27,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 03:55:27,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-04-15 03:55:27,218 INFO L87 Difference]: Start difference. First operand 8140 states and 29217 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 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) [2021-04-15 03:55:27,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:55:27,546 INFO L93 Difference]: Finished difference Result 10852 states and 38322 transitions. [2021-04-15 03:55:27,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 03:55:27,547 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 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 [2021-04-15 03:55:27,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:55:27,580 INFO L225 Difference]: With dead ends: 10852 [2021-04-15 03:55:27,580 INFO L226 Difference]: Without dead ends: 10785 [2021-04-15 03:55:27,581 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 224.1ms TimeCoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2021-04-15 03:55:27,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10785 states. [2021-04-15 03:55:27,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10785 to 8157. [2021-04-15 03:55:27,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8157 states, 8156 states have (on average 3.5922020598332516) internal successors, (29298), 8156 states have internal predecessors, (29298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:55:27,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8157 states to 8157 states and 29298 transitions. [2021-04-15 03:55:27,819 INFO L78 Accepts]: Start accepts. Automaton has 8157 states and 29298 transitions. Word has length 23 [2021-04-15 03:55:27,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:55:27,819 INFO L480 AbstractCegarLoop]: Abstraction has 8157 states and 29298 transitions. [2021-04-15 03:55:27,819 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 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) [2021-04-15 03:55:27,820 INFO L276 IsEmpty]: Start isEmpty. Operand 8157 states and 29298 transitions. [2021-04-15 03:55:27,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-04-15 03:55:27,835 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:55:27,835 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:55:28,036 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-04-15 03:55:28,036 INFO L428 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:55:28,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:55:28,037 INFO L82 PathProgramCache]: Analyzing trace with hash 1071003837, now seen corresponding path program 12 times [2021-04-15 03:55:28,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:55:28,037 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657356708] [2021-04-15 03:55:28,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:55:28,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:55:28,143 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:55:28,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657356708] [2021-04-15 03:55:28,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099978267] [2021-04-15 03:55:28,143 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2021-04-15 03:55:28,166 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-04-15 03:55:28,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:55:28,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2021-04-15 03:55:28,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:55:28,261 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:55:28,261 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:55:28,262 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-04-15 03:55:28,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715556925] [2021-04-15 03:55:28,262 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 03:55:28,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:55:28,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 03:55:28,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-04-15 03:55:28,263 INFO L87 Difference]: Start difference. First operand 8157 states and 29298 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) [2021-04-15 03:55:28,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:55:28,476 INFO L93 Difference]: Finished difference Result 8303 states and 29650 transitions. [2021-04-15 03:55:28,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-04-15 03:55:28,477 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 23 [2021-04-15 03:55:28,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:55:28,503 INFO L225 Difference]: With dead ends: 8303 [2021-04-15 03:55:28,504 INFO L226 Difference]: Without dead ends: 8248 [2021-04-15 03:55:28,504 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 133.5ms TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-04-15 03:55:28,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8248 states. [2021-04-15 03:55:28,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8248 to 8175. [2021-04-15 03:55:28,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8175 states, 8174 states have (on average 3.5910203082945924) internal successors, (29353), 8174 states have internal predecessors, (29353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:55:28,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8175 states to 8175 states and 29353 transitions. [2021-04-15 03:55:28,697 INFO L78 Accepts]: Start accepts. Automaton has 8175 states and 29353 transitions. Word has length 23 [2021-04-15 03:55:28,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:55:28,697 INFO L480 AbstractCegarLoop]: Abstraction has 8175 states and 29353 transitions. [2021-04-15 03:55:28,697 INFO L481 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) [2021-04-15 03:55:28,697 INFO L276 IsEmpty]: Start isEmpty. Operand 8175 states and 29353 transitions. [2021-04-15 03:55:28,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-04-15 03:55:28,714 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:55:28,714 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:55:28,914 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:55:28,915 INFO L428 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:55:28,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:55:28,915 INFO L82 PathProgramCache]: Analyzing trace with hash 271963833, now seen corresponding path program 13 times [2021-04-15 03:55:28,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:55:28,915 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369985717] [2021-04-15 03:55:28,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:55:28,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:55:29,001 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:55:29,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369985717] [2021-04-15 03:55:29,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63396347] [2021-04-15 03:55:29,002 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2021-04-15 03:55:29,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:55:29,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2021-04-15 03:55:29,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:55:29,138 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:55:29,139 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:55:29,139 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-04-15 03:55:29,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448847027] [2021-04-15 03:55:29,139 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 03:55:29,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:55:29,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 03:55:29,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-04-15 03:55:29,140 INFO L87 Difference]: Start difference. First operand 8175 states and 29353 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 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) [2021-04-15 03:55:29,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:55:29,443 INFO L93 Difference]: Finished difference Result 10332 states and 36818 transitions. [2021-04-15 03:55:29,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-04-15 03:55:29,444 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 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 [2021-04-15 03:55:29,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:55:29,481 INFO L225 Difference]: With dead ends: 10332 [2021-04-15 03:55:29,481 INFO L226 Difference]: Without dead ends: 10286 [2021-04-15 03:55:29,481 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 173.1ms TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-04-15 03:55:29,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10286 states. [2021-04-15 03:55:29,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10286 to 8171. [2021-04-15 03:55:29,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8171 states, 8170 states have (on average 3.591309669522644) internal successors, (29341), 8170 states have internal predecessors, (29341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:55:29,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8171 states to 8171 states and 29341 transitions. [2021-04-15 03:55:29,704 INFO L78 Accepts]: Start accepts. Automaton has 8171 states and 29341 transitions. Word has length 23 [2021-04-15 03:55:29,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:55:29,704 INFO L480 AbstractCegarLoop]: Abstraction has 8171 states and 29341 transitions. [2021-04-15 03:55:29,704 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 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) [2021-04-15 03:55:29,704 INFO L276 IsEmpty]: Start isEmpty. Operand 8171 states and 29341 transitions. [2021-04-15 03:55:29,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-04-15 03:55:29,721 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:55:29,721 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:55:29,925 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-04-15 03:55:29,925 INFO L428 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:55:29,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:55:29,926 INFO L82 PathProgramCache]: Analyzing trace with hash 11839967, now seen corresponding path program 14 times [2021-04-15 03:55:29,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:55:29,926 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954255411] [2021-04-15 03:55:29,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:55:29,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:55:30,039 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:55:30,040 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954255411] [2021-04-15 03:55:30,040 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308346200] [2021-04-15 03:55:30,040 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_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 [2021-04-15 03:55:30,060 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 03:55:30,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:55:30,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2021-04-15 03:55:30,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:55:30,137 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:55:30,137 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:55:30,137 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-04-15 03:55:30,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358476164] [2021-04-15 03:55:30,138 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 03:55:30,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:55:30,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 03:55:30,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-04-15 03:55:30,138 INFO L87 Difference]: Start difference. First operand 8171 states and 29341 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 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) [2021-04-15 03:55:30,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:55:30,328 INFO L93 Difference]: Finished difference Result 8275 states and 29573 transitions. [2021-04-15 03:55:30,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-04-15 03:55:30,329 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 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 23 [2021-04-15 03:55:30,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:55:30,356 INFO L225 Difference]: With dead ends: 8275 [2021-04-15 03:55:30,356 INFO L226 Difference]: Without dead ends: 8232 [2021-04-15 03:55:30,357 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 116.2ms TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-04-15 03:55:30,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8232 states. [2021-04-15 03:55:30,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8232 to 8175. [2021-04-15 03:55:30,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8175 states, 8174 states have (on average 3.5902862735502814) internal successors, (29347), 8174 states have internal predecessors, (29347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:55:30,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8175 states to 8175 states and 29347 transitions. [2021-04-15 03:55:30,543 INFO L78 Accepts]: Start accepts. Automaton has 8175 states and 29347 transitions. Word has length 23 [2021-04-15 03:55:30,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:55:30,543 INFO L480 AbstractCegarLoop]: Abstraction has 8175 states and 29347 transitions. [2021-04-15 03:55:30,544 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 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) [2021-04-15 03:55:30,544 INFO L276 IsEmpty]: Start isEmpty. Operand 8175 states and 29347 transitions. [2021-04-15 03:55:30,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-04-15 03:55:30,560 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:55:30,560 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:55:30,760 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2021-04-15 03:55:30,761 INFO L428 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:55:30,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:55:30,761 INFO L82 PathProgramCache]: Analyzing trace with hash 33595821, now seen corresponding path program 15 times [2021-04-15 03:55:30,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:55:30,761 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401230844] [2021-04-15 03:55:30,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:55:30,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:55:30,815 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:55:30,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401230844] [2021-04-15 03:55:30,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583990775] [2021-04-15 03:55:30,815 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-15 03:55:30,852 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-04-15 03:55:30,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:55:30,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 03:55:30,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:55:30,912 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:55:30,912 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:55:30,912 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-04-15 03:55:30,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130735542] [2021-04-15 03:55:30,913 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 03:55:30,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:55:30,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 03:55:30,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-04-15 03:55:30,913 INFO L87 Difference]: Start difference. First operand 8175 states and 29347 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 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) [2021-04-15 03:55:31,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:55:31,117 INFO L93 Difference]: Finished difference Result 10463 states and 37022 transitions. [2021-04-15 03:55:31,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-04-15 03:55:31,117 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 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 23 [2021-04-15 03:55:31,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:55:31,153 INFO L225 Difference]: With dead ends: 10463 [2021-04-15 03:55:31,153 INFO L226 Difference]: Without dead ends: 10463 [2021-04-15 03:55:31,153 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 82.1ms TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-04-15 03:55:31,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10463 states. [2021-04-15 03:55:31,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10463 to 8533. [2021-04-15 03:55:31,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8533 states, 8532 states have (on average 3.587318330989217) internal successors, (30607), 8532 states have internal predecessors, (30607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:55:31,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8533 states to 8533 states and 30607 transitions. [2021-04-15 03:55:31,377 INFO L78 Accepts]: Start accepts. Automaton has 8533 states and 30607 transitions. Word has length 23 [2021-04-15 03:55:31,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:55:31,378 INFO L480 AbstractCegarLoop]: Abstraction has 8533 states and 30607 transitions. [2021-04-15 03:55:31,378 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 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) [2021-04-15 03:55:31,378 INFO L276 IsEmpty]: Start isEmpty. Operand 8533 states and 30607 transitions. [2021-04-15 03:55:31,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-04-15 03:55:31,395 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:55:31,395 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:55:31,596 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:55:31,597 INFO L428 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:55:31,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:55:31,597 INFO L82 PathProgramCache]: Analyzing trace with hash -108973523, now seen corresponding path program 16 times [2021-04-15 03:55:31,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:55:31,598 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380053418] [2021-04-15 03:55:31,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:55:31,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:55:31,655 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:55:31,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380053418] [2021-04-15 03:55:31,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197470726] [2021-04-15 03:55:31,656 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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 [2021-04-15 03:55:31,679 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 03:55:31,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:55:31,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 03:55:31,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:55:31,769 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:55:31,769 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:55:31,770 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-04-15 03:55:31,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818154912] [2021-04-15 03:55:31,770 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 03:55:31,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:55:31,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 03:55:31,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2021-04-15 03:55:31,771 INFO L87 Difference]: Start difference. First operand 8533 states and 30607 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 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) [2021-04-15 03:55:32,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:55:32,094 INFO L93 Difference]: Finished difference Result 18599 states and 66456 transitions. [2021-04-15 03:55:32,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-04-15 03:55:32,094 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 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 [2021-04-15 03:55:32,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:55:32,165 INFO L225 Difference]: With dead ends: 18599 [2021-04-15 03:55:32,165 INFO L226 Difference]: Without dead ends: 18599 [2021-04-15 03:55:32,165 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 133.4ms TimeCoverageRelationStatistics Valid=100, Invalid=172, Unknown=0, NotChecked=0, Total=272 [2021-04-15 03:55:32,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18599 states. [2021-04-15 03:55:32,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18599 to 14058. [2021-04-15 03:55:32,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14058 states, 14057 states have (on average 3.598634132460696) internal successors, (50586), 14057 states have internal predecessors, (50586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:55:32,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14058 states to 14058 states and 50586 transitions. [2021-04-15 03:55:32,572 INFO L78 Accepts]: Start accepts. Automaton has 14058 states and 50586 transitions. Word has length 23 [2021-04-15 03:55:32,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:55:32,572 INFO L480 AbstractCegarLoop]: Abstraction has 14058 states and 50586 transitions. [2021-04-15 03:55:32,572 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 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) [2021-04-15 03:55:32,573 INFO L276 IsEmpty]: Start isEmpty. Operand 14058 states and 50586 transitions. [2021-04-15 03:55:32,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-04-15 03:55:32,599 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:55:32,599 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:55:32,799 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-04-15 03:55:32,800 INFO L428 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:55:32,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:55:32,800 INFO L82 PathProgramCache]: Analyzing trace with hash -1805708085, now seen corresponding path program 17 times [2021-04-15 03:55:32,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:55:32,800 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940459493] [2021-04-15 03:55:32,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:55:32,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:55:32,858 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:55:32,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940459493] [2021-04-15 03:55:32,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283207431] [2021-04-15 03:55:32,859 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 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 [2021-04-15 03:55:32,884 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-04-15 03:55:32,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:55:32,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 03:55:32,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:55:32,966 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:55:32,967 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:55:32,967 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-04-15 03:55:32,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123105119] [2021-04-15 03:55:32,967 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 03:55:32,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:55:32,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 03:55:32,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-04-15 03:55:32,968 INFO L87 Difference]: Start difference. First operand 14058 states and 50586 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 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) [2021-04-15 03:55:33,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:55:33,279 INFO L93 Difference]: Finished difference Result 14997 states and 53374 transitions. [2021-04-15 03:55:33,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-04-15 03:55:33,279 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 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 23 [2021-04-15 03:55:33,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:55:33,339 INFO L225 Difference]: With dead ends: 14997 [2021-04-15 03:55:33,339 INFO L226 Difference]: Without dead ends: 14997 [2021-04-15 03:55:33,339 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 101.2ms TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-04-15 03:55:33,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14997 states. [2021-04-15 03:55:33,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14997 to 14058. [2021-04-15 03:55:33,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14058 states, 14057 states have (on average 3.598634132460696) internal successors, (50586), 14057 states have internal predecessors, (50586), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:55:33,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14058 states to 14058 states and 50586 transitions. [2021-04-15 03:55:33,834 INFO L78 Accepts]: Start accepts. Automaton has 14058 states and 50586 transitions. Word has length 23 [2021-04-15 03:55:33,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:55:33,834 INFO L480 AbstractCegarLoop]: Abstraction has 14058 states and 50586 transitions. [2021-04-15 03:55:33,834 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 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) [2021-04-15 03:55:33,834 INFO L276 IsEmpty]: Start isEmpty. Operand 14058 states and 50586 transitions. [2021-04-15 03:55:33,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-04-15 03:55:33,860 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:55:33,861 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:55:34,061 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:55:34,061 INFO L428 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:55:34,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:55:34,062 INFO L82 PathProgramCache]: Analyzing trace with hash -1550642503, now seen corresponding path program 18 times [2021-04-15 03:55:34,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:55:34,062 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856601320] [2021-04-15 03:55:34,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:55:34,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:55:34,124 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:55:34,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856601320] [2021-04-15 03:55:34,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246030599] [2021-04-15 03:55:34,124 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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) [2021-04-15 03:55:34,163 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-04-15 03:55:34,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:55:34,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 03:55:34,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:55:34,263 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:55:34,264 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:55:34,264 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-04-15 03:55:34,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614443730] [2021-04-15 03:55:34,264 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 03:55:34,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:55:34,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 03:55:34,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-04-15 03:55:34,265 INFO L87 Difference]: Start difference. First operand 14058 states and 50586 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 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) [2021-04-15 03:55:34,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:55:34,721 INFO L93 Difference]: Finished difference Result 25256 states and 90164 transitions. [2021-04-15 03:55:34,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 03:55:34,722 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 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 [2021-04-15 03:55:34,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:55:34,828 INFO L225 Difference]: With dead ends: 25256 [2021-04-15 03:55:34,828 INFO L226 Difference]: Without dead ends: 25256 [2021-04-15 03:55:34,829 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 189.1ms TimeCoverageRelationStatistics Valid=126, Invalid=216, Unknown=0, NotChecked=0, Total=342 [2021-04-15 03:55:34,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25256 states. [2021-04-15 03:55:35,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25256 to 14108. [2021-04-15 03:55:35,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14108 states, 14107 states have (on average 3.5999149358474516) internal successors, (50784), 14107 states have internal predecessors, (50784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:55:35,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14108 states to 14108 states and 50784 transitions. [2021-04-15 03:55:35,403 INFO L78 Accepts]: Start accepts. Automaton has 14108 states and 50784 transitions. Word has length 23 [2021-04-15 03:55:35,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:55:35,403 INFO L480 AbstractCegarLoop]: Abstraction has 14108 states and 50784 transitions. [2021-04-15 03:55:35,403 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 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) [2021-04-15 03:55:35,403 INFO L276 IsEmpty]: Start isEmpty. Operand 14108 states and 50784 transitions. [2021-04-15 03:55:35,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-04-15 03:55:35,437 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:55:35,437 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:55:35,637 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-04-15 03:55:35,638 INFO L428 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:55:35,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:55:35,638 INFO L82 PathProgramCache]: Analyzing trace with hash -530911043, now seen corresponding path program 19 times [2021-04-15 03:55:35,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:55:35,638 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55495075] [2021-04-15 03:55:35,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:55:35,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:55:35,718 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:55:35,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55495075] [2021-04-15 03:55:35,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920853972] [2021-04-15 03:55:35,718 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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) [2021-04-15 03:55:35,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:55:35,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 03:55:35,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:55:35,846 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:55:35,846 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:55:35,846 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-04-15 03:55:35,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877479011] [2021-04-15 03:55:35,848 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 03:55:35,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:55:35,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 03:55:35,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-04-15 03:55:35,849 INFO L87 Difference]: Start difference. First operand 14108 states and 50784 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 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) [2021-04-15 03:55:36,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:55:36,305 INFO L93 Difference]: Finished difference Result 21867 states and 76984 transitions. [2021-04-15 03:55:36,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-04-15 03:55:36,306 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 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 [2021-04-15 03:55:36,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:55:36,425 INFO L225 Difference]: With dead ends: 21867 [2021-04-15 03:55:36,425 INFO L226 Difference]: Without dead ends: 21867 [2021-04-15 03:55:36,426 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 197.6ms TimeCoverageRelationStatistics Valid=129, Invalid=213, Unknown=0, NotChecked=0, Total=342 [2021-04-15 03:55:36,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21867 states. [2021-04-15 03:55:36,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21867 to 14162. [2021-04-15 03:55:36,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14162 states, 14161 states have (on average 3.599957630110868) internal successors, (50979), 14161 states have internal predecessors, (50979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:55:37,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14162 states to 14162 states and 50979 transitions. [2021-04-15 03:55:37,004 INFO L78 Accepts]: Start accepts. Automaton has 14162 states and 50979 transitions. Word has length 23 [2021-04-15 03:55:37,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:55:37,004 INFO L480 AbstractCegarLoop]: Abstraction has 14162 states and 50979 transitions. [2021-04-15 03:55:37,004 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 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) [2021-04-15 03:55:37,004 INFO L276 IsEmpty]: Start isEmpty. Operand 14162 states and 50979 transitions. [2021-04-15 03:55:37,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-04-15 03:55:37,036 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:55:37,036 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:55:37,237 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-04-15 03:55:37,237 INFO L428 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:55:37,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:55:37,238 INFO L82 PathProgramCache]: Analyzing trace with hash 851877945, now seen corresponding path program 20 times [2021-04-15 03:55:37,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:55:37,238 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919261231] [2021-04-15 03:55:37,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:55:37,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:55:37,301 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:55:37,301 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919261231] [2021-04-15 03:55:37,301 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86896596] [2021-04-15 03:55:37,302 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2021-04-15 03:55:37,329 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 03:55:37,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:55:37,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 03:55:37,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:55:37,482 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:55:37,483 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:55:37,483 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-04-15 03:55:37,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131315008] [2021-04-15 03:55:37,484 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 03:55:37,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:55:37,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 03:55:37,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2021-04-15 03:55:37,485 INFO L87 Difference]: Start difference. First operand 14162 states and 50979 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 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) [2021-04-15 03:55:38,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:55:38,010 INFO L93 Difference]: Finished difference Result 27150 states and 96606 transitions. [2021-04-15 03:55:38,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-04-15 03:55:38,011 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 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 [2021-04-15 03:55:38,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:55:38,129 INFO L225 Difference]: With dead ends: 27150 [2021-04-15 03:55:38,129 INFO L226 Difference]: Without dead ends: 27144 [2021-04-15 03:55:38,130 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 272.5ms TimeCoverageRelationStatistics Valid=186, Invalid=320, Unknown=0, NotChecked=0, Total=506 [2021-04-15 03:55:38,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27144 states. [2021-04-15 03:55:38,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27144 to 14874. [2021-04-15 03:55:38,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14874 states, 14873 states have (on average 3.604921670140523) internal successors, (53616), 14873 states have internal predecessors, (53616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:55:38,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14874 states to 14874 states and 53616 transitions. [2021-04-15 03:55:38,727 INFO L78 Accepts]: Start accepts. Automaton has 14874 states and 53616 transitions. Word has length 23 [2021-04-15 03:55:38,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:55:38,727 INFO L480 AbstractCegarLoop]: Abstraction has 14874 states and 53616 transitions. [2021-04-15 03:55:38,727 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 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) [2021-04-15 03:55:38,728 INFO L276 IsEmpty]: Start isEmpty. Operand 14874 states and 53616 transitions. [2021-04-15 03:55:38,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-04-15 03:55:38,762 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:55:38,762 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:55:38,962 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:55:38,963 INFO L428 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:55:38,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:55:38,963 INFO L82 PathProgramCache]: Analyzing trace with hash 1871609405, now seen corresponding path program 21 times [2021-04-15 03:55:38,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:55:38,963 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525225918] [2021-04-15 03:55:38,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:55:38,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:55:39,021 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:55:39,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525225918] [2021-04-15 03:55:39,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273878901] [2021-04-15 03:55:39,021 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2021-04-15 03:55:39,063 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-04-15 03:55:39,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:55:39,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 03:55:39,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:55:39,172 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:55:39,173 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:55:39,173 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-04-15 03:55:39,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937044370] [2021-04-15 03:55:39,173 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 03:55:39,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:55:39,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 03:55:39,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-04-15 03:55:39,174 INFO L87 Difference]: Start difference. First operand 14874 states and 53616 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 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) [2021-04-15 03:55:39,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:55:39,590 INFO L93 Difference]: Finished difference Result 22680 states and 79637 transitions. [2021-04-15 03:55:39,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 03:55:39,591 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 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 [2021-04-15 03:55:39,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:55:39,673 INFO L225 Difference]: With dead ends: 22680 [2021-04-15 03:55:39,674 INFO L226 Difference]: Without dead ends: 22680 [2021-04-15 03:55:39,674 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 255.8ms TimeCoverageRelationStatistics Valid=200, Invalid=352, Unknown=0, NotChecked=0, Total=552 [2021-04-15 03:55:39,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22680 states. [2021-04-15 03:55:40,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22680 to 14862. [2021-04-15 03:55:40,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14862 states, 14861 states have (on average 3.6048045219029676) internal successors, (53571), 14861 states have internal predecessors, (53571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:55:40,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14862 states to 14862 states and 53571 transitions. [2021-04-15 03:55:40,161 INFO L78 Accepts]: Start accepts. Automaton has 14862 states and 53571 transitions. Word has length 23 [2021-04-15 03:55:40,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:55:40,161 INFO L480 AbstractCegarLoop]: Abstraction has 14862 states and 53571 transitions. [2021-04-15 03:55:40,162 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 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) [2021-04-15 03:55:40,162 INFO L276 IsEmpty]: Start isEmpty. Operand 14862 states and 53571 transitions. [2021-04-15 03:55:40,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-04-15 03:55:40,194 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:55:40,194 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:55:40,394 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2021-04-15 03:55:40,395 INFO L428 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:55:40,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:55:40,395 INFO L82 PathProgramCache]: Analyzing trace with hash -1111272131, now seen corresponding path program 22 times [2021-04-15 03:55:40,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:55:40,395 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436803297] [2021-04-15 03:55:40,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:55:40,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:55:40,450 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:55:40,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436803297] [2021-04-15 03:55:40,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053920792] [2021-04-15 03:55:40,451 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 03:55:40,486 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 03:55:40,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:55:40,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 03:55:40,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:55:40,575 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:55:40,576 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:55:40,576 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-04-15 03:55:40,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121417379] [2021-04-15 03:55:40,576 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 03:55:40,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:55:40,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 03:55:40,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-04-15 03:55:40,577 INFO L87 Difference]: Start difference. First operand 14862 states and 53571 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 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) [2021-04-15 03:55:40,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:55:40,984 INFO L93 Difference]: Finished difference Result 19297 states and 68666 transitions. [2021-04-15 03:55:40,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 03:55:40,985 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 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 [2021-04-15 03:55:40,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:55:41,084 INFO L225 Difference]: With dead ends: 19297 [2021-04-15 03:55:41,085 INFO L226 Difference]: Without dead ends: 19297 [2021-04-15 03:55:41,085 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 172.1ms TimeCoverageRelationStatistics Valid=118, Invalid=224, Unknown=0, NotChecked=0, Total=342 [2021-04-15 03:55:41,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19297 states. [2021-04-15 03:55:41,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19297 to 14862. [2021-04-15 03:55:41,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14862 states, 14861 states have (on average 3.6048045219029676) internal successors, (53571), 14861 states have internal predecessors, (53571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:55:41,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14862 states to 14862 states and 53571 transitions. [2021-04-15 03:55:41,657 INFO L78 Accepts]: Start accepts. Automaton has 14862 states and 53571 transitions. Word has length 23 [2021-04-15 03:55:41,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:55:41,657 INFO L480 AbstractCegarLoop]: Abstraction has 14862 states and 53571 transitions. [2021-04-15 03:55:41,657 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 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) [2021-04-15 03:55:41,657 INFO L276 IsEmpty]: Start isEmpty. Operand 14862 states and 53571 transitions. [2021-04-15 03:55:41,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-04-15 03:55:41,695 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:55:41,695 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:55:41,895 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-04-15 03:55:41,896 INFO L428 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:55:41,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:55:41,896 INFO L82 PathProgramCache]: Analyzing trace with hash 1359329409, now seen corresponding path program 23 times [2021-04-15 03:55:41,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:55:41,896 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90781359] [2021-04-15 03:55:41,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:55:41,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:55:41,954 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:55:41,954 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90781359] [2021-04-15 03:55:41,954 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397014901] [2021-04-15 03:55:41,954 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-15 03:55:41,975 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-04-15 03:55:41,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:55:41,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 03:55:41,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:55:42,053 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:55:42,053 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:55:42,053 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-04-15 03:55:42,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979909457] [2021-04-15 03:55:42,053 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 03:55:42,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:55:42,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 03:55:42,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2021-04-15 03:55:42,054 INFO L87 Difference]: Start difference. First operand 14862 states and 53571 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 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) [2021-04-15 03:55:42,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:55:42,418 INFO L93 Difference]: Finished difference Result 33945 states and 122633 transitions. [2021-04-15 03:55:42,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 03:55:42,419 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 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 [2021-04-15 03:55:42,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:55:42,562 INFO L225 Difference]: With dead ends: 33945 [2021-04-15 03:55:42,563 INFO L226 Difference]: Without dead ends: 33935 [2021-04-15 03:55:42,563 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 123.6ms TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2021-04-15 03:55:42,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33935 states. [2021-04-15 03:55:43,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33935 to 26076. [2021-04-15 03:55:43,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26076 states, 26075 states have (on average 3.595091083413231) internal successors, (93742), 26075 states have internal predecessors, (93742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:55:43,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26076 states to 26076 states and 93742 transitions. [2021-04-15 03:55:43,283 INFO L78 Accepts]: Start accepts. Automaton has 26076 states and 93742 transitions. Word has length 23 [2021-04-15 03:55:43,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:55:43,284 INFO L480 AbstractCegarLoop]: Abstraction has 26076 states and 93742 transitions. [2021-04-15 03:55:43,284 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 11 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) [2021-04-15 03:55:43,284 INFO L276 IsEmpty]: Start isEmpty. Operand 26076 states and 93742 transitions. [2021-04-15 03:55:43,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-04-15 03:55:43,317 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:55:43,317 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:55:43,518 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,54 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:55:43,518 INFO L428 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:55:43,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:55:43,519 INFO L82 PathProgramCache]: Analyzing trace with hash -337405153, now seen corresponding path program 24 times [2021-04-15 03:55:43,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:55:43,519 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520412888] [2021-04-15 03:55:43,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:55:43,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:55:43,576 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:55:43,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520412888] [2021-04-15 03:55:43,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395062944] [2021-04-15 03:55:43,576 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2021-04-15 03:55:43,597 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-04-15 03:55:43,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:55:43,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 12 conjunts are in the unsatisfiable core [2021-04-15 03:55:43,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:55:43,666 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:55:43,666 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:55:43,667 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-04-15 03:55:43,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250368847] [2021-04-15 03:55:43,667 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 03:55:43,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:55:43,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 03:55:43,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-04-15 03:55:43,668 INFO L87 Difference]: Start difference. First operand 26076 states and 93742 transitions. Second operand has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 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) [2021-04-15 03:55:44,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:55:44,028 INFO L93 Difference]: Finished difference Result 26734 states and 95761 transitions. [2021-04-15 03:55:44,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-04-15 03:55:44,029 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 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 23 [2021-04-15 03:55:44,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:55:44,141 INFO L225 Difference]: With dead ends: 26734 [2021-04-15 03:55:44,141 INFO L226 Difference]: Without dead ends: 26734 [2021-04-15 03:55:44,142 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 118.9ms TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2021-04-15 03:55:44,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26734 states. [2021-04-15 03:55:44,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26734 to 26088. [2021-04-15 03:55:44,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26088 states, 26087 states have (on average 3.5951240081266533) internal successors, (93786), 26087 states have internal predecessors, (93786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:55:44,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26088 states to 26088 states and 93786 transitions. [2021-04-15 03:55:44,840 INFO L78 Accepts]: Start accepts. Automaton has 26088 states and 93786 transitions. Word has length 23 [2021-04-15 03:55:44,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:55:44,841 INFO L480 AbstractCegarLoop]: Abstraction has 26088 states and 93786 transitions. [2021-04-15 03:55:44,841 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 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) [2021-04-15 03:55:44,841 INFO L276 IsEmpty]: Start isEmpty. Operand 26088 states and 93786 transitions. [2021-04-15 03:55:44,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-04-15 03:55:44,886 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:55:44,886 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:55:45,086 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:55:45,087 INFO L428 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:55:45,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:55:45,087 INFO L82 PathProgramCache]: Analyzing trace with hash 1911852527, now seen corresponding path program 15 times [2021-04-15 03:55:45,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:55:45,087 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633771338] [2021-04-15 03:55:45,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:55:45,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:55:45,119 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:55:45,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633771338] [2021-04-15 03:55:45,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323068902] [2021-04-15 03:55:45,119 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2021-04-15 03:55:45,145 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-04-15 03:55:45,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:55:45,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 03:55:45,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:55:45,229 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:55:45,229 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:55:45,229 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-04-15 03:55:45,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234243486] [2021-04-15 03:55:45,230 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 03:55:45,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:55:45,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 03:55:45,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-04-15 03:55:45,231 INFO L87 Difference]: Start difference. First operand 26088 states and 93786 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 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) [2021-04-15 03:55:45,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:55:45,592 INFO L93 Difference]: Finished difference Result 27275 states and 97322 transitions. [2021-04-15 03:55:45,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-04-15 03:55:45,593 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 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 [2021-04-15 03:55:45,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:55:45,708 INFO L225 Difference]: With dead ends: 27275 [2021-04-15 03:55:45,708 INFO L226 Difference]: Without dead ends: 27223 [2021-04-15 03:55:45,708 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 109.4ms TimeCoverageRelationStatistics Valid=90, Invalid=150, Unknown=0, NotChecked=0, Total=240 [2021-04-15 03:55:45,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27223 states. [2021-04-15 03:55:46,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27223 to 26365. [2021-04-15 03:55:46,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26365 states, 26364 states have (on average 3.5933469883174025) internal successors, (94735), 26364 states have internal predecessors, (94735), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:55:46,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26365 states to 26365 states and 94735 transitions. [2021-04-15 03:55:46,465 INFO L78 Accepts]: Start accepts. Automaton has 26365 states and 94735 transitions. Word has length 23 [2021-04-15 03:55:46,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:55:46,465 INFO L480 AbstractCegarLoop]: Abstraction has 26365 states and 94735 transitions. [2021-04-15 03:55:46,465 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 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) [2021-04-15 03:55:46,465 INFO L276 IsEmpty]: Start isEmpty. Operand 26365 states and 94735 transitions. [2021-04-15 03:55:46,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-04-15 03:55:46,513 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:55:46,513 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:55:46,713 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:55:46,714 INFO L428 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:55:46,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:55:46,714 INFO L82 PathProgramCache]: Analyzing trace with hash 1784976879, now seen corresponding path program 16 times [2021-04-15 03:55:46,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:55:46,714 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584097318] [2021-04-15 03:55:46,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:55:46,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:55:46,743 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:55:46,743 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584097318] [2021-04-15 03:55:46,743 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684539433] [2021-04-15 03:55:46,744 INFO L93 rtionOrderModulation]: Changing 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 [2021-04-15 03:55:46,763 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 03:55:46,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:55:46,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 03:55:46,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:55:46,832 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:55:46,833 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:55:46,833 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-04-15 03:55:46,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115715802] [2021-04-15 03:55:46,833 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 03:55:46,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:55:46,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 03:55:46,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-04-15 03:55:46,834 INFO L87 Difference]: Start difference. First operand 26365 states and 94735 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 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) [2021-04-15 03:55:47,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:55:47,173 INFO L93 Difference]: Finished difference Result 26807 states and 95786 transitions. [2021-04-15 03:55:47,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-04-15 03:55:47,174 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 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 [2021-04-15 03:55:47,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:55:47,288 INFO L225 Difference]: With dead ends: 26807 [2021-04-15 03:55:47,288 INFO L226 Difference]: Without dead ends: 26797 [2021-04-15 03:55:47,288 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 100.3ms TimeCoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2021-04-15 03:55:47,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26797 states. [2021-04-15 03:55:47,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26797 to 26277. [2021-04-15 03:55:48,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26277 states, 26276 states have (on average 3.593811843507383) internal successors, (94431), 26276 states have internal predecessors, (94431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:55:48,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26277 states to 26277 states and 94431 transitions. [2021-04-15 03:55:48,174 INFO L78 Accepts]: Start accepts. Automaton has 26277 states and 94431 transitions. Word has length 23 [2021-04-15 03:55:48,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:55:48,174 INFO L480 AbstractCegarLoop]: Abstraction has 26277 states and 94431 transitions. [2021-04-15 03:55:48,174 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 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) [2021-04-15 03:55:48,174 INFO L276 IsEmpty]: Start isEmpty. Operand 26277 states and 94431 transitions. [2021-04-15 03:55:48,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-04-15 03:55:48,222 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:55:48,222 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:55:48,422 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:55:48,423 INFO L428 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:55:48,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:55:48,423 INFO L82 PathProgramCache]: Analyzing trace with hash -51297549, now seen corresponding path program 17 times [2021-04-15 03:55:48,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:55:48,423 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698328072] [2021-04-15 03:55:48,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:55:48,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:55:48,453 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:55:48,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698328072] [2021-04-15 03:55:48,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351783648] [2021-04-15 03:55:48,453 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 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 [2021-04-15 03:55:48,475 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-04-15 03:55:48,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:55:48,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 03:55:48,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:55:48,547 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:55:48,547 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:55:48,547 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-04-15 03:55:48,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354811604] [2021-04-15 03:55:48,548 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 03:55:48,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:55:48,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 03:55:48,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-04-15 03:55:48,548 INFO L87 Difference]: Start difference. First operand 26277 states and 94431 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) [2021-04-15 03:55:48,782 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 9 DAG size of output: 8 [2021-04-15 03:55:49,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:55:49,098 INFO L93 Difference]: Finished difference Result 26602 states and 95215 transitions. [2021-04-15 03:55:49,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 03:55:49,098 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 23 [2021-04-15 03:55:49,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:55:49,353 INFO L225 Difference]: With dead ends: 26602 [2021-04-15 03:55:49,353 INFO L226 Difference]: Without dead ends: 26542 [2021-04-15 03:55:49,353 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 288.5ms TimeCoverageRelationStatistics Valid=117, Invalid=263, Unknown=0, NotChecked=0, Total=380 [2021-04-15 03:55:49,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26542 states. [2021-04-15 03:55:49,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26542 to 26119. [2021-04-15 03:55:49,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26119 states, 26118 states have (on average 3.5962937437782374) internal successors, (93928), 26118 states have internal predecessors, (93928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:55:50,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26119 states to 26119 states and 93928 transitions. [2021-04-15 03:55:50,058 INFO L78 Accepts]: Start accepts. Automaton has 26119 states and 93928 transitions. Word has length 23 [2021-04-15 03:55:50,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:55:50,058 INFO L480 AbstractCegarLoop]: Abstraction has 26119 states and 93928 transitions. [2021-04-15 03:55:50,058 INFO L481 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) [2021-04-15 03:55:50,058 INFO L276 IsEmpty]: Start isEmpty. Operand 26119 states and 93928 transitions. [2021-04-15 03:55:50,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-04-15 03:55:50,101 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:55:50,101 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:55:50,301 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:55:50,301 INFO L428 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:55:50,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:55:50,302 INFO L82 PathProgramCache]: Analyzing trace with hash 837128115, now seen corresponding path program 18 times [2021-04-15 03:55:50,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:55:50,302 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325479845] [2021-04-15 03:55:50,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:55:50,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:55:50,339 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:55:50,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325479845] [2021-04-15 03:55:50,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59847743] [2021-04-15 03:55:50,340 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2021-04-15 03:55:50,362 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-04-15 03:55:50,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:55:50,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 03:55:50,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:55:50,440 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:55:50,441 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:55:50,441 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-04-15 03:55:50,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960239684] [2021-04-15 03:55:50,441 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 03:55:50,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:55:50,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 03:55:50,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-04-15 03:55:50,442 INFO L87 Difference]: Start difference. First operand 26119 states and 93928 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 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) [2021-04-15 03:55:50,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:55:50,929 INFO L93 Difference]: Finished difference Result 26987 states and 96631 transitions. [2021-04-15 03:55:50,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-04-15 03:55:50,930 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 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 [2021-04-15 03:55:50,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:55:51,036 INFO L225 Difference]: With dead ends: 26987 [2021-04-15 03:55:51,037 INFO L226 Difference]: Without dead ends: 26963 [2021-04-15 03:55:51,037 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 129.3ms TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2021-04-15 03:55:51,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26963 states. [2021-04-15 03:55:51,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26963 to 26267. [2021-04-15 03:55:51,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26267 states, 26266 states have (on average 3.5969694662301075) internal successors, (94478), 26266 states have internal predecessors, (94478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:55:51,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26267 states to 26267 states and 94478 transitions. [2021-04-15 03:55:51,994 INFO L78 Accepts]: Start accepts. Automaton has 26267 states and 94478 transitions. Word has length 23 [2021-04-15 03:55:51,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:55:51,994 INFO L480 AbstractCegarLoop]: Abstraction has 26267 states and 94478 transitions. [2021-04-15 03:55:51,994 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 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) [2021-04-15 03:55:51,994 INFO L276 IsEmpty]: Start isEmpty. Operand 26267 states and 94478 transitions. [2021-04-15 03:55:52,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-04-15 03:55:52,041 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:55:52,042 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:55:52,242 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2021-04-15 03:55:52,242 INFO L428 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:55:52,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:55:52,243 INFO L82 PathProgramCache]: Analyzing trace with hash 710252467, now seen corresponding path program 19 times [2021-04-15 03:55:52,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:55:52,243 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367845107] [2021-04-15 03:55:52,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:55:52,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:55:52,292 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:55:52,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367845107] [2021-04-15 03:55:52,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230520253] [2021-04-15 03:55:52,292 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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) [2021-04-15 03:55:52,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:55:52,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 03:55:52,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:55:52,408 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:55:52,409 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:55:52,409 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-04-15 03:55:52,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70318415] [2021-04-15 03:55:52,410 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 03:55:52,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:55:52,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 03:55:52,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-04-15 03:55:52,412 INFO L87 Difference]: Start difference. First operand 26267 states and 94478 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 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) [2021-04-15 03:55:52,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:55:52,975 INFO L93 Difference]: Finished difference Result 26543 states and 95133 transitions. [2021-04-15 03:55:52,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 03:55:52,976 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 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 [2021-04-15 03:55:52,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:55:53,096 INFO L225 Difference]: With dead ends: 26543 [2021-04-15 03:55:53,096 INFO L226 Difference]: Without dead ends: 26533 [2021-04-15 03:55:53,096 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 132.5ms TimeCoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2021-04-15 03:55:53,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26533 states. [2021-04-15 03:55:53,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26533 to 26261. [2021-04-15 03:55:53,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26261 states, 26260 states have (on average 3.596839299314547) internal successors, (94453), 26260 states have internal predecessors, (94453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:55:53,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26261 states to 26261 states and 94453 transitions. [2021-04-15 03:55:53,921 INFO L78 Accepts]: Start accepts. Automaton has 26261 states and 94453 transitions. Word has length 23 [2021-04-15 03:55:53,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:55:53,921 INFO L480 AbstractCegarLoop]: Abstraction has 26261 states and 94453 transitions. [2021-04-15 03:55:53,921 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 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) [2021-04-15 03:55:53,921 INFO L276 IsEmpty]: Start isEmpty. Operand 26261 states and 94453 transitions. [2021-04-15 03:55:53,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-04-15 03:55:53,967 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:55:53,967 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:55:54,167 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:55:54,168 INFO L428 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:55:54,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:55:54,168 INFO L82 PathProgramCache]: Analyzing trace with hash 1071393779, now seen corresponding path program 20 times [2021-04-15 03:55:54,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:55:54,168 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899220739] [2021-04-15 03:55:54,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:55:54,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:55:54,368 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:55:54,368 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899220739] [2021-04-15 03:55:54,368 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469706003] [2021-04-15 03:55:54,368 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2021-04-15 03:55:54,441 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 03:55:54,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:55:54,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 03:55:54,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:55:54,523 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:55:54,523 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:55:54,523 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-04-15 03:55:54,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150458200] [2021-04-15 03:55:54,524 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 03:55:54,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:55:54,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 03:55:54,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-04-15 03:55:54,524 INFO L87 Difference]: Start difference. First operand 26261 states and 94453 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 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) [2021-04-15 03:55:54,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:55:54,881 INFO L93 Difference]: Finished difference Result 26792 states and 96145 transitions. [2021-04-15 03:55:54,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-04-15 03:55:54,882 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 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 23 [2021-04-15 03:55:54,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:55:55,007 INFO L225 Difference]: With dead ends: 26792 [2021-04-15 03:55:55,007 INFO L226 Difference]: Without dead ends: 26792 [2021-04-15 03:55:55,007 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 277.0ms TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2021-04-15 03:55:55,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26792 states. [2021-04-15 03:55:55,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26792 to 26250. [2021-04-15 03:55:55,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26250 states, 26249 states have (on average 3.595908415558688) internal successors, (94389), 26249 states have internal predecessors, (94389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:55:56,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26250 states to 26250 states and 94389 transitions. [2021-04-15 03:55:56,018 INFO L78 Accepts]: Start accepts. Automaton has 26250 states and 94389 transitions. Word has length 23 [2021-04-15 03:55:56,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:55:56,018 INFO L480 AbstractCegarLoop]: Abstraction has 26250 states and 94389 transitions. [2021-04-15 03:55:56,018 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 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) [2021-04-15 03:55:56,019 INFO L276 IsEmpty]: Start isEmpty. Operand 26250 states and 94389 transitions. [2021-04-15 03:55:56,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-04-15 03:55:56,073 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:55:56,073 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:55:56,277 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2021-04-15 03:55:56,277 INFO L428 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:55:56,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:55:56,278 INFO L82 PathProgramCache]: Analyzing trace with hash 1604402439, now seen corresponding path program 25 times [2021-04-15 03:55:56,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:55:56,278 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872285081] [2021-04-15 03:55:56,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:55:56,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:55:56,366 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:55:56,366 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872285081] [2021-04-15 03:55:56,366 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466971624] [2021-04-15 03:55:56,366 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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) [2021-04-15 03:55:56,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:55:56,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2021-04-15 03:55:56,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:55:56,493 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:55:56,494 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:55:56,494 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-04-15 03:55:56,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897739856] [2021-04-15 03:55:56,494 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 03:55:56,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:55:56,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 03:55:56,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-04-15 03:55:56,495 INFO L87 Difference]: Start difference. First operand 26250 states and 94389 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 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) [2021-04-15 03:55:56,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:55:56,897 INFO L93 Difference]: Finished difference Result 26475 states and 94952 transitions. [2021-04-15 03:55:56,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-04-15 03:55:56,898 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 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 [2021-04-15 03:55:56,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:55:57,021 INFO L225 Difference]: With dead ends: 26475 [2021-04-15 03:55:57,022 INFO L226 Difference]: Without dead ends: 26404 [2021-04-15 03:55:57,022 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 137.8ms TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-04-15 03:55:57,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26404 states. [2021-04-15 03:55:57,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26404 to 26284. [2021-04-15 03:55:57,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26284 states, 26283 states have (on average 3.595099493969486) internal successors, (94490), 26283 states have internal predecessors, (94490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:55:58,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26284 states to 26284 states and 94490 transitions. [2021-04-15 03:55:58,144 INFO L78 Accepts]: Start accepts. Automaton has 26284 states and 94490 transitions. Word has length 23 [2021-04-15 03:55:58,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:55:58,144 INFO L480 AbstractCegarLoop]: Abstraction has 26284 states and 94490 transitions. [2021-04-15 03:55:58,144 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 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) [2021-04-15 03:55:58,144 INFO L276 IsEmpty]: Start isEmpty. Operand 26284 states and 94490 transitions. [2021-04-15 03:55:58,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-04-15 03:55:58,203 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:55:58,203 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:55:58,404 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:55:58,404 INFO L428 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:55:58,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:55:58,405 INFO L82 PathProgramCache]: Analyzing trace with hash 805362435, now seen corresponding path program 26 times [2021-04-15 03:55:58,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:55:58,405 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996337601] [2021-04-15 03:55:58,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:55:58,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:55:58,490 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:55:58,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996337601] [2021-04-15 03:55:58,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422349441] [2021-04-15 03:55:58,490 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2021-04-15 03:55:58,520 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 03:55:58,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:55:58,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2021-04-15 03:55:58,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:55:58,638 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:55:58,639 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:55:58,640 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-04-15 03:55:58,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867369443] [2021-04-15 03:55:58,641 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 03:55:58,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:55:58,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 03:55:58,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-04-15 03:55:58,642 INFO L87 Difference]: Start difference. First operand 26284 states and 94490 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 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) [2021-04-15 03:55:59,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:55:59,026 INFO L93 Difference]: Finished difference Result 33195 states and 119238 transitions. [2021-04-15 03:55:59,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-04-15 03:55:59,027 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 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 [2021-04-15 03:55:59,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:55:59,172 INFO L225 Difference]: With dead ends: 33195 [2021-04-15 03:55:59,172 INFO L226 Difference]: Without dead ends: 33149 [2021-04-15 03:55:59,172 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 143.1ms TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-04-15 03:55:59,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33149 states. [2021-04-15 03:55:59,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33149 to 26274. [2021-04-15 03:55:59,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26274 states, 26273 states have (on average 3.5954782476306475) internal successors, (94464), 26273 states have internal predecessors, (94464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:56:00,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26274 states to 26274 states and 94464 transitions. [2021-04-15 03:56:00,084 INFO L78 Accepts]: Start accepts. Automaton has 26274 states and 94464 transitions. Word has length 23 [2021-04-15 03:56:00,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:56:00,084 INFO L480 AbstractCegarLoop]: Abstraction has 26274 states and 94464 transitions. [2021-04-15 03:56:00,084 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 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) [2021-04-15 03:56:00,084 INFO L276 IsEmpty]: Start isEmpty. Operand 26274 states and 94464 transitions. [2021-04-15 03:56:00,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-04-15 03:56:00,308 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:56:00,309 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:56:00,512 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:56:00,512 INFO L428 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:56:00,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:56:00,513 INFO L82 PathProgramCache]: Analyzing trace with hash 723963379, now seen corresponding path program 27 times [2021-04-15 03:56:00,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:56:00,513 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790961078] [2021-04-15 03:56:00,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:56:00,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:56:00,602 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:56:00,602 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790961078] [2021-04-15 03:56:00,602 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097801591] [2021-04-15 03:56:00,603 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2021-04-15 03:56:00,634 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-04-15 03:56:00,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:56:00,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2021-04-15 03:56:00,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:56:00,777 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:56:00,777 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:56:00,777 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-04-15 03:56:00,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502421852] [2021-04-15 03:56:00,778 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 03:56:00,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:56:00,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 03:56:00,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-04-15 03:56:00,779 INFO L87 Difference]: Start difference. First operand 26274 states and 94464 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 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) [2021-04-15 03:56:01,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:56:01,757 INFO L93 Difference]: Finished difference Result 33827 states and 120954 transitions. [2021-04-15 03:56:01,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-04-15 03:56:01,758 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 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 [2021-04-15 03:56:01,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:56:01,885 INFO L225 Difference]: With dead ends: 33827 [2021-04-15 03:56:01,885 INFO L226 Difference]: Without dead ends: 33589 [2021-04-15 03:56:01,886 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 515.7ms TimeCoverageRelationStatistics Valid=257, Invalid=613, Unknown=0, NotChecked=0, Total=870 [2021-04-15 03:56:01,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33589 states. [2021-04-15 03:56:02,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33589 to 26278. [2021-04-15 03:56:02,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26278 states, 26277 states have (on average 3.59557788179777) internal successors, (94481), 26277 states have internal predecessors, (94481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:56:02,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26278 states to 26278 states and 94481 transitions. [2021-04-15 03:56:02,755 INFO L78 Accepts]: Start accepts. Automaton has 26278 states and 94481 transitions. Word has length 23 [2021-04-15 03:56:02,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:56:02,755 INFO L480 AbstractCegarLoop]: Abstraction has 26278 states and 94481 transitions. [2021-04-15 03:56:02,755 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 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) [2021-04-15 03:56:02,756 INFO L276 IsEmpty]: Start isEmpty. Operand 26278 states and 94481 transitions. [2021-04-15 03:56:02,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-04-15 03:56:02,799 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:56:02,800 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:56:03,000 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:56:03,000 INFO L428 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:56:03,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:56:03,001 INFO L82 PathProgramCache]: Analyzing trace with hash -1201212733, now seen corresponding path program 28 times [2021-04-15 03:56:03,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:56:03,001 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388242471] [2021-04-15 03:56:03,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:56:03,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:56:03,090 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:56:03,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388242471] [2021-04-15 03:56:03,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790904147] [2021-04-15 03:56:03,090 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 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 [2021-04-15 03:56:03,117 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 03:56:03,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:56:03,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2021-04-15 03:56:03,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:56:03,186 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:56:03,188 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:56:03,188 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-04-15 03:56:03,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916902102] [2021-04-15 03:56:03,188 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 03:56:03,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:56:03,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 03:56:03,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-04-15 03:56:03,189 INFO L87 Difference]: Start difference. First operand 26278 states and 94481 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) [2021-04-15 03:56:03,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:56:03,681 INFO L93 Difference]: Finished difference Result 26465 states and 94972 transitions. [2021-04-15 03:56:03,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-04-15 03:56:03,682 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 23 [2021-04-15 03:56:03,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:56:03,793 INFO L225 Difference]: With dead ends: 26465 [2021-04-15 03:56:03,794 INFO L226 Difference]: Without dead ends: 26406 [2021-04-15 03:56:03,794 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 101.1ms TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-04-15 03:56:03,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26406 states. [2021-04-15 03:56:04,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26406 to 26302. [2021-04-15 03:56:04,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26302 states, 26301 states have (on average 3.595262537546101) internal successors, (94559), 26301 states have internal predecessors, (94559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:56:04,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26302 states to 26302 states and 94559 transitions. [2021-04-15 03:56:04,497 INFO L78 Accepts]: Start accepts. Automaton has 26302 states and 94559 transitions. Word has length 23 [2021-04-15 03:56:04,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:56:04,497 INFO L480 AbstractCegarLoop]: Abstraction has 26302 states and 94559 transitions. [2021-04-15 03:56:04,498 INFO L481 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) [2021-04-15 03:56:04,498 INFO L276 IsEmpty]: Start isEmpty. Operand 26302 states and 94559 transitions. [2021-04-15 03:56:04,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-04-15 03:56:04,738 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:56:04,739 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:56:04,939 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:56:04,939 INFO L428 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:56:04,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:56:04,940 INFO L82 PathProgramCache]: Analyzing trace with hash -2000252737, now seen corresponding path program 29 times [2021-04-15 03:56:04,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:56:04,940 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864631902] [2021-04-15 03:56:04,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:56:04,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:56:05,028 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:56:05,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864631902] [2021-04-15 03:56:05,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428356117] [2021-04-15 03:56:05,028 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_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 [2021-04-15 03:56:05,051 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-04-15 03:56:05,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:56:05,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2021-04-15 03:56:05,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:56:05,139 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:56:05,139 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:56:05,140 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-04-15 03:56:05,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240685023] [2021-04-15 03:56:05,140 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 03:56:05,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:56:05,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 03:56:05,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-04-15 03:56:05,140 INFO L87 Difference]: Start difference. First operand 26302 states and 94559 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) [2021-04-15 03:56:05,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:56:05,548 INFO L93 Difference]: Finished difference Result 33157 states and 119124 transitions. [2021-04-15 03:56:05,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-04-15 03:56:05,549 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 23 [2021-04-15 03:56:05,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:56:05,695 INFO L225 Difference]: With dead ends: 33157 [2021-04-15 03:56:05,696 INFO L226 Difference]: Without dead ends: 33111 [2021-04-15 03:56:05,696 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 152.1ms TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-04-15 03:56:05,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33111 states. [2021-04-15 03:56:06,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33111 to 26299. [2021-04-15 03:56:06,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26299 states, 26298 states have (on average 3.595520571906609) internal successors, (94555), 26298 states have internal predecessors, (94555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:56:06,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26299 states to 26299 states and 94555 transitions. [2021-04-15 03:56:06,657 INFO L78 Accepts]: Start accepts. Automaton has 26299 states and 94555 transitions. Word has length 23 [2021-04-15 03:56:06,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:56:06,657 INFO L480 AbstractCegarLoop]: Abstraction has 26299 states and 94555 transitions. [2021-04-15 03:56:06,657 INFO L481 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) [2021-04-15 03:56:06,657 INFO L276 IsEmpty]: Start isEmpty. Operand 26299 states and 94555 transitions. [2021-04-15 03:56:06,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-04-15 03:56:06,706 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:56:06,706 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:56:06,907 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2021-04-15 03:56:06,907 INFO L428 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:56:06,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:56:06,908 INFO L82 PathProgramCache]: Analyzing trace with hash 2034590693, now seen corresponding path program 30 times [2021-04-15 03:56:06,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:56:06,908 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080756212] [2021-04-15 03:56:06,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:56:06,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:56:07,017 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:56:07,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080756212] [2021-04-15 03:56:07,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548156154] [2021-04-15 03:56:07,018 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2021-04-15 03:56:07,046 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-04-15 03:56:07,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:56:07,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2021-04-15 03:56:07,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:56:07,118 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:56:07,118 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:56:07,119 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-04-15 03:56:07,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602172336] [2021-04-15 03:56:07,119 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 03:56:07,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:56:07,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 03:56:07,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-04-15 03:56:07,120 INFO L87 Difference]: Start difference. First operand 26299 states and 94555 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 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) [2021-04-15 03:56:07,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:56:07,437 INFO L93 Difference]: Finished difference Result 26430 states and 94880 transitions. [2021-04-15 03:56:07,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-04-15 03:56:07,438 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 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 23 [2021-04-15 03:56:07,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:56:07,553 INFO L225 Difference]: With dead ends: 26430 [2021-04-15 03:56:07,553 INFO L226 Difference]: Without dead ends: 26387 [2021-04-15 03:56:07,554 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 119.9ms TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-04-15 03:56:07,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26387 states. [2021-04-15 03:56:08,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26387 to 26303. [2021-04-15 03:56:08,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26303 states, 26302 states have (on average 3.595201885788153) internal successors, (94561), 26302 states have internal predecessors, (94561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:56:08,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26303 states to 26303 states and 94561 transitions. [2021-04-15 03:56:08,482 INFO L78 Accepts]: Start accepts. Automaton has 26303 states and 94561 transitions. Word has length 23 [2021-04-15 03:56:08,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:56:08,483 INFO L480 AbstractCegarLoop]: Abstraction has 26303 states and 94561 transitions. [2021-04-15 03:56:08,483 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 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) [2021-04-15 03:56:08,483 INFO L276 IsEmpty]: Start isEmpty. Operand 26303 states and 94561 transitions. [2021-04-15 03:56:08,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-04-15 03:56:08,525 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:56:08,525 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:56:08,725 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-04-15 03:56:08,726 INFO L428 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:56:08,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:56:08,726 INFO L82 PathProgramCache]: Analyzing trace with hash 2056346547, now seen corresponding path program 31 times [2021-04-15 03:56:08,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:56:08,727 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132727915] [2021-04-15 03:56:08,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:56:08,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:56:08,794 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:56:08,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132727915] [2021-04-15 03:56:08,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051774128] [2021-04-15 03:56:08,795 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2021-04-15 03:56:08,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:56:08,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 03:56:08,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:56:08,870 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:56:08,871 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:56:08,871 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-04-15 03:56:08,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798389279] [2021-04-15 03:56:08,871 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 03:56:08,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:56:08,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 03:56:08,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-04-15 03:56:08,871 INFO L87 Difference]: Start difference. First operand 26303 states and 94561 transitions. Second operand has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 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) [2021-04-15 03:56:09,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:56:09,202 INFO L93 Difference]: Finished difference Result 27397 states and 97838 transitions. [2021-04-15 03:56:09,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 03:56:09,202 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 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 23 [2021-04-15 03:56:09,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:56:09,311 INFO L225 Difference]: With dead ends: 27397 [2021-04-15 03:56:09,311 INFO L226 Difference]: Without dead ends: 27397 [2021-04-15 03:56:09,312 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 111.1ms TimeCoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2021-04-15 03:56:09,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27397 states. [2021-04-15 03:56:10,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27397 to 26148. [2021-04-15 03:56:10,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26148 states, 26147 states have (on average 3.595861857956936) internal successors, (94021), 26147 states have internal predecessors, (94021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:56:10,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26148 states to 26148 states and 94021 transitions. [2021-04-15 03:56:10,238 INFO L78 Accepts]: Start accepts. Automaton has 26148 states and 94021 transitions. Word has length 23 [2021-04-15 03:56:10,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:56:10,238 INFO L480 AbstractCegarLoop]: Abstraction has 26148 states and 94021 transitions. [2021-04-15 03:56:10,238 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 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) [2021-04-15 03:56:10,238 INFO L276 IsEmpty]: Start isEmpty. Operand 26148 states and 94021 transitions. [2021-04-15 03:56:10,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-04-15 03:56:10,286 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:56:10,286 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:56:10,488 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:56:10,489 INFO L428 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:56:10,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:56:10,489 INFO L82 PathProgramCache]: Analyzing trace with hash 472108223, now seen corresponding path program 32 times [2021-04-15 03:56:10,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:56:10,489 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868981952] [2021-04-15 03:56:10,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:56:10,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:56:10,558 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:56:10,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868981952] [2021-04-15 03:56:10,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19232075] [2021-04-15 03:56:10,559 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-15 03:56:10,591 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 03:56:10,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:56:10,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 03:56:10,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:56:10,680 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:56:10,680 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:56:10,680 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-04-15 03:56:10,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798480032] [2021-04-15 03:56:10,680 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 03:56:10,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:56:10,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 03:56:10,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-04-15 03:56:10,681 INFO L87 Difference]: Start difference. First operand 26148 states and 94021 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 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) [2021-04-15 03:56:11,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:56:11,457 INFO L93 Difference]: Finished difference Result 42723 states and 155237 transitions. [2021-04-15 03:56:11,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-04-15 03:56:11,457 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 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 [2021-04-15 03:56:11,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:56:11,635 INFO L225 Difference]: With dead ends: 42723 [2021-04-15 03:56:11,635 INFO L226 Difference]: Without dead ends: 42723 [2021-04-15 03:56:11,636 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 184.6ms TimeCoverageRelationStatistics Valid=153, Invalid=267, Unknown=0, NotChecked=0, Total=420 [2021-04-15 03:56:11,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42723 states. [2021-04-15 03:56:12,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42723 to 21505. [2021-04-15 03:56:12,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21505 states, 21504 states have (on average 3.5904482886904763) internal successors, (77209), 21504 states have internal predecessors, (77209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:56:12,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21505 states to 21505 states and 77209 transitions. [2021-04-15 03:56:12,427 INFO L78 Accepts]: Start accepts. Automaton has 21505 states and 77209 transitions. Word has length 23 [2021-04-15 03:56:12,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:56:12,430 INFO L480 AbstractCegarLoop]: Abstraction has 21505 states and 77209 transitions. [2021-04-15 03:56:12,430 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 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) [2021-04-15 03:56:12,430 INFO L276 IsEmpty]: Start isEmpty. Operand 21505 states and 77209 transitions. [2021-04-15 03:56:12,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-04-15 03:56:12,473 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:56:12,473 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:56:12,674 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-04-15 03:56:12,674 INFO L428 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:56:12,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:56:12,674 INFO L82 PathProgramCache]: Analyzing trace with hash 1491839683, now seen corresponding path program 33 times [2021-04-15 03:56:12,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:56:12,675 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642849044] [2021-04-15 03:56:12,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:56:12,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:56:12,734 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:56:12,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642849044] [2021-04-15 03:56:12,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282962156] [2021-04-15 03:56:12,734 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2021-04-15 03:56:12,942 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-04-15 03:56:12,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:56:12,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 03:56:12,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:56:13,060 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:56:13,061 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:56:13,061 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-04-15 03:56:13,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340428550] [2021-04-15 03:56:13,061 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 03:56:13,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:56:13,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 03:56:13,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-04-15 03:56:13,062 INFO L87 Difference]: Start difference. First operand 21505 states and 77209 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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) [2021-04-15 03:56:13,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:56:13,617 INFO L93 Difference]: Finished difference Result 32944 states and 119221 transitions. [2021-04-15 03:56:13,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 03:56:13,617 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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 23 [2021-04-15 03:56:13,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:56:13,762 INFO L225 Difference]: With dead ends: 32944 [2021-04-15 03:56:13,763 INFO L226 Difference]: Without dead ends: 32944 [2021-04-15 03:56:13,763 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 211.4ms TimeCoverageRelationStatistics Valid=151, Invalid=269, Unknown=0, NotChecked=0, Total=420 [2021-04-15 03:56:13,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32944 states. [2021-04-15 03:56:14,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32944 to 25922. [2021-04-15 03:56:14,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25922 states, 25921 states have (on average 3.586397129740365) internal successors, (92963), 25921 states have internal predecessors, (92963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:56:14,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25922 states to 25922 states and 92963 transitions. [2021-04-15 03:56:14,911 INFO L78 Accepts]: Start accepts. Automaton has 25922 states and 92963 transitions. Word has length 23 [2021-04-15 03:56:14,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:56:14,911 INFO L480 AbstractCegarLoop]: Abstraction has 25922 states and 92963 transitions. [2021-04-15 03:56:14,911 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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) [2021-04-15 03:56:14,911 INFO L276 IsEmpty]: Start isEmpty. Operand 25922 states and 92963 transitions. [2021-04-15 03:56:14,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-04-15 03:56:14,964 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:56:14,964 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:56:15,164 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:56:15,165 INFO L428 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:56:15,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:56:15,165 INFO L82 PathProgramCache]: Analyzing trace with hash -1489861369, now seen corresponding path program 34 times [2021-04-15 03:56:15,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:56:15,165 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023782752] [2021-04-15 03:56:15,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:56:15,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:56:15,258 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:56:15,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023782752] [2021-04-15 03:56:15,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514738905] [2021-04-15 03:56:15,258 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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 [2021-04-15 03:56:15,283 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 03:56:15,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:56:15,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2021-04-15 03:56:15,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:56:15,356 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:56:15,357 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:56:15,357 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-04-15 03:56:15,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481124912] [2021-04-15 03:56:15,357 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 03:56:15,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:56:15,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 03:56:15,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-04-15 03:56:15,358 INFO L87 Difference]: Start difference. First operand 25922 states and 92963 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) [2021-04-15 03:56:15,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:56:15,753 INFO L93 Difference]: Finished difference Result 26059 states and 93304 transitions. [2021-04-15 03:56:15,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-04-15 03:56:15,753 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 23 [2021-04-15 03:56:15,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:56:15,909 INFO L225 Difference]: With dead ends: 26059 [2021-04-15 03:56:15,909 INFO L226 Difference]: Without dead ends: 26010 [2021-04-15 03:56:15,910 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 114.6ms TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-04-15 03:56:15,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26010 states. [2021-04-15 03:56:16,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26010 to 25935. [2021-04-15 03:56:16,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25935 states, 25934 states have (on average 3.5862188632682965) internal successors, (93005), 25934 states have internal predecessors, (93005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:56:17,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25935 states to 25935 states and 93005 transitions. [2021-04-15 03:56:17,134 INFO L78 Accepts]: Start accepts. Automaton has 25935 states and 93005 transitions. Word has length 23 [2021-04-15 03:56:17,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:56:17,135 INFO L480 AbstractCegarLoop]: Abstraction has 25935 states and 93005 transitions. [2021-04-15 03:56:17,135 INFO L481 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) [2021-04-15 03:56:17,135 INFO L276 IsEmpty]: Start isEmpty. Operand 25935 states and 93005 transitions. [2021-04-15 03:56:17,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-04-15 03:56:17,192 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:56:17,192 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:56:17,421 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-04-15 03:56:17,421 INFO L428 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:56:17,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:56:17,421 INFO L82 PathProgramCache]: Analyzing trace with hash 2006065923, now seen corresponding path program 35 times [2021-04-15 03:56:17,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:56:17,422 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797831870] [2021-04-15 03:56:17,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:56:17,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:56:17,507 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:56:17,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797831870] [2021-04-15 03:56:17,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243687454] [2021-04-15 03:56:17,507 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_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 [2021-04-15 03:56:17,528 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-04-15 03:56:17,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:56:17,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2021-04-15 03:56:17,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:56:17,606 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:56:17,607 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:56:17,607 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-04-15 03:56:17,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080957251] [2021-04-15 03:56:17,607 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 03:56:17,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:56:17,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 03:56:17,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-04-15 03:56:17,608 INFO L87 Difference]: Start difference. First operand 25935 states and 93005 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) [2021-04-15 03:56:18,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:56:18,153 INFO L93 Difference]: Finished difference Result 32792 states and 117496 transitions. [2021-04-15 03:56:18,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-04-15 03:56:18,154 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 23 [2021-04-15 03:56:18,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:56:18,288 INFO L225 Difference]: With dead ends: 32792 [2021-04-15 03:56:18,289 INFO L226 Difference]: Without dead ends: 32673 [2021-04-15 03:56:18,289 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 233.8ms TimeCoverageRelationStatistics Valid=116, Invalid=264, Unknown=0, NotChecked=0, Total=380 [2021-04-15 03:56:18,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32673 states. [2021-04-15 03:56:19,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32673 to 25932. [2021-04-15 03:56:19,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25932 states, 25931 states have (on average 3.586363811654005) internal successors, (92998), 25931 states have internal predecessors, (92998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:56:19,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25932 states to 25932 states and 92998 transitions. [2021-04-15 03:56:19,190 INFO L78 Accepts]: Start accepts. Automaton has 25932 states and 92998 transitions. Word has length 23 [2021-04-15 03:56:19,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:56:19,190 INFO L480 AbstractCegarLoop]: Abstraction has 25932 states and 92998 transitions. [2021-04-15 03:56:19,190 INFO L481 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) [2021-04-15 03:56:19,190 INFO L276 IsEmpty]: Start isEmpty. Operand 25932 states and 92998 transitions. [2021-04-15 03:56:19,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-04-15 03:56:19,242 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:56:19,242 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:56:19,443 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:56:19,444 INFO L428 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:56:19,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:56:19,444 INFO L82 PathProgramCache]: Analyzing trace with hash 1745942057, now seen corresponding path program 36 times [2021-04-15 03:56:19,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:56:19,444 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535575520] [2021-04-15 03:56:19,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:56:19,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:56:19,597 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:56:19,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535575520] [2021-04-15 03:56:19,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121671334] [2021-04-15 03:56:19,597 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 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 03:56:19,634 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-04-15 03:56:19,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:56:19,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2021-04-15 03:56:19,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:56:19,696 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:56:19,696 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:56:19,696 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-04-15 03:56:19,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029679207] [2021-04-15 03:56:19,697 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 03:56:19,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:56:19,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 03:56:19,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-04-15 03:56:19,698 INFO L87 Difference]: Start difference. First operand 25932 states and 92998 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 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) [2021-04-15 03:56:20,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:56:20,003 INFO L93 Difference]: Finished difference Result 26059 states and 93301 transitions. [2021-04-15 03:56:20,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-04-15 03:56:20,004 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 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 23 [2021-04-15 03:56:20,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:56:20,101 INFO L225 Difference]: With dead ends: 26059 [2021-04-15 03:56:20,101 INFO L226 Difference]: Without dead ends: 26016 [2021-04-15 03:56:20,102 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 131.1ms TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-04-15 03:56:20,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26016 states. [2021-04-15 03:56:20,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26016 to 25932. [2021-04-15 03:56:20,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25932 states, 25931 states have (on average 3.586363811654005) internal successors, (92998), 25931 states have internal predecessors, (92998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:56:21,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25932 states to 25932 states and 92998 transitions. [2021-04-15 03:56:21,071 INFO L78 Accepts]: Start accepts. Automaton has 25932 states and 92998 transitions. Word has length 23 [2021-04-15 03:56:21,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:56:21,071 INFO L480 AbstractCegarLoop]: Abstraction has 25932 states and 92998 transitions. [2021-04-15 03:56:21,072 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 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) [2021-04-15 03:56:21,072 INFO L276 IsEmpty]: Start isEmpty. Operand 25932 states and 92998 transitions. [2021-04-15 03:56:21,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-04-15 03:56:21,126 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:56:21,126 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:56:21,327 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:56:21,327 INFO L428 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:56:21,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:56:21,328 INFO L82 PathProgramCache]: Analyzing trace with hash 1767697911, now seen corresponding path program 37 times [2021-04-15 03:56:21,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:56:21,328 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163031394] [2021-04-15 03:56:21,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:56:21,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:56:21,386 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:56:21,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163031394] [2021-04-15 03:56:21,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811213857] [2021-04-15 03:56:21,387 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2021-04-15 03:56:21,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:56:21,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 03:56:21,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:56:21,481 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:56:21,481 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:56:21,482 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-04-15 03:56:21,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321354595] [2021-04-15 03:56:21,482 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 03:56:21,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:56:21,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 03:56:21,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-04-15 03:56:21,483 INFO L87 Difference]: Start difference. First operand 25932 states and 92998 transitions. Second operand has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 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) [2021-04-15 03:56:21,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:56:21,989 INFO L93 Difference]: Finished difference Result 27582 states and 98159 transitions. [2021-04-15 03:56:21,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-04-15 03:56:21,989 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 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 23 [2021-04-15 03:56:21,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:56:22,133 INFO L225 Difference]: With dead ends: 27582 [2021-04-15 03:56:22,133 INFO L226 Difference]: Without dead ends: 27582 [2021-04-15 03:56:22,134 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 151.5ms TimeCoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2021-04-15 03:56:22,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27582 states. [2021-04-15 03:56:22,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27582 to 26354. [2021-04-15 03:56:22,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26354 states, 26353 states have (on average 3.585436193222783) internal successors, (94487), 26353 states have internal predecessors, (94487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:56:23,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26354 states to 26354 states and 94487 transitions. [2021-04-15 03:56:23,321 INFO L78 Accepts]: Start accepts. Automaton has 26354 states and 94487 transitions. Word has length 23 [2021-04-15 03:56:23,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:56:23,322 INFO L480 AbstractCegarLoop]: Abstraction has 26354 states and 94487 transitions. [2021-04-15 03:56:23,322 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 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) [2021-04-15 03:56:23,322 INFO L276 IsEmpty]: Start isEmpty. Operand 26354 states and 94487 transitions. [2021-04-15 03:56:23,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-04-15 03:56:23,371 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:56:23,372 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:56:23,572 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:56:23,572 INFO L428 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:56:23,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:56:23,573 INFO L82 PathProgramCache]: Analyzing trace with hash 1625128567, now seen corresponding path program 38 times [2021-04-15 03:56:23,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:56:23,573 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966420817] [2021-04-15 03:56:23,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:56:23,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:56:23,630 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:56:23,631 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966420817] [2021-04-15 03:56:23,631 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278690680] [2021-04-15 03:56:23,631 INFO L93 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 [2021-04-15 03:56:23,656 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 03:56:23,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:56:23,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 03:56:23,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:56:23,739 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:56:23,739 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:56:23,739 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-04-15 03:56:23,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018549355] [2021-04-15 03:56:23,740 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 03:56:23,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:56:23,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 03:56:23,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-04-15 03:56:23,740 INFO L87 Difference]: Start difference. First operand 26354 states and 94487 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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) [2021-04-15 03:56:24,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:56:24,264 INFO L93 Difference]: Finished difference Result 35465 states and 126867 transitions. [2021-04-15 03:56:24,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-04-15 03:56:24,265 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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 23 [2021-04-15 03:56:24,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:56:24,452 INFO L225 Difference]: With dead ends: 35465 [2021-04-15 03:56:24,452 INFO L226 Difference]: Without dead ends: 35465 [2021-04-15 03:56:24,452 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 172.3ms TimeCoverageRelationStatistics Valid=125, Invalid=217, Unknown=0, NotChecked=0, Total=342 [2021-04-15 03:56:24,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35465 states. [2021-04-15 03:56:25,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35465 to 25981. [2021-04-15 03:56:25,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25981 states, 25980 states have (on average 3.5869515011547346) internal successors, (93189), 25980 states have internal predecessors, (93189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:56:25,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25981 states to 25981 states and 93189 transitions. [2021-04-15 03:56:25,664 INFO L78 Accepts]: Start accepts. Automaton has 25981 states and 93189 transitions. Word has length 23 [2021-04-15 03:56:25,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:56:25,664 INFO L480 AbstractCegarLoop]: Abstraction has 25981 states and 93189 transitions. [2021-04-15 03:56:25,664 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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) [2021-04-15 03:56:25,664 INFO L276 IsEmpty]: Start isEmpty. Operand 25981 states and 93189 transitions. [2021-04-15 03:56:25,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-04-15 03:56:25,716 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:56:25,716 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:56:25,916 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-04-15 03:56:25,917 INFO L428 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:56:25,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:56:25,917 INFO L82 PathProgramCache]: Analyzing trace with hash 685163967, now seen corresponding path program 39 times [2021-04-15 03:56:25,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:56:25,918 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320251533] [2021-04-15 03:56:25,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:56:25,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:56:26,028 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:56:26,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320251533] [2021-04-15 03:56:26,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111754804] [2021-04-15 03:56:26,029 INFO L93 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 [2021-04-15 03:56:26,050 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-04-15 03:56:26,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:56:26,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 17 conjunts are in the unsatisfiable core [2021-04-15 03:56:26,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:56:26,110 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:56:26,110 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:56:26,111 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-04-15 03:56:26,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931418463] [2021-04-15 03:56:26,111 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 03:56:26,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:56:26,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 03:56:26,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-04-15 03:56:26,111 INFO L87 Difference]: Start difference. First operand 25981 states and 93189 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 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) [2021-04-15 03:56:26,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:56:26,430 INFO L93 Difference]: Finished difference Result 26050 states and 93338 transitions. [2021-04-15 03:56:26,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-04-15 03:56:26,431 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 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 23 [2021-04-15 03:56:26,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:56:26,547 INFO L225 Difference]: With dead ends: 26050 [2021-04-15 03:56:26,548 INFO L226 Difference]: Without dead ends: 26007 [2021-04-15 03:56:26,548 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 121.9ms TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-04-15 03:56:26,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26007 states. [2021-04-15 03:56:27,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26007 to 25986. [2021-04-15 03:56:27,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25986 states, 25985 states have (on average 3.586800076967481) internal successors, (93203), 25985 states have internal predecessors, (93203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:56:27,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25986 states to 25986 states and 93203 transitions. [2021-04-15 03:56:27,660 INFO L78 Accepts]: Start accepts. Automaton has 25986 states and 93203 transitions. Word has length 23 [2021-04-15 03:56:27,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:56:27,660 INFO L480 AbstractCegarLoop]: Abstraction has 25986 states and 93203 transitions. [2021-04-15 03:56:27,660 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 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) [2021-04-15 03:56:27,660 INFO L276 IsEmpty]: Start isEmpty. Operand 25986 states and 93203 transitions. [2021-04-15 03:56:27,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-04-15 03:56:27,724 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:56:27,724 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:56:27,938 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-04-15 03:56:27,938 INFO L428 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:56:27,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:56:27,938 INFO L82 PathProgramCache]: Analyzing trace with hash 706919821, now seen corresponding path program 40 times [2021-04-15 03:56:27,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:56:27,939 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625887230] [2021-04-15 03:56:27,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:56:27,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:56:28,000 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:56:28,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625887230] [2021-04-15 03:56:28,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949401463] [2021-04-15 03:56:28,001 INFO L93 rtionOrderModulation]: Changing 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) [2021-04-15 03:56:28,030 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 03:56:28,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:56:28,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2021-04-15 03:56:28,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:56:28,088 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:56:28,089 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:56:28,089 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-04-15 03:56:28,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438554416] [2021-04-15 03:56:28,090 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 03:56:28,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:56:28,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 03:56:28,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-04-15 03:56:28,091 INFO L87 Difference]: Start difference. First operand 25986 states and 93203 transitions. Second operand has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 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) [2021-04-15 03:56:28,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:56:28,451 INFO L93 Difference]: Finished difference Result 29926 states and 106677 transitions. [2021-04-15 03:56:28,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-04-15 03:56:28,451 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 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 23 [2021-04-15 03:56:28,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:56:28,582 INFO L225 Difference]: With dead ends: 29926 [2021-04-15 03:56:28,582 INFO L226 Difference]: Without dead ends: 29926 [2021-04-15 03:56:28,583 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 117.1ms TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-04-15 03:56:28,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29926 states. [2021-04-15 03:56:29,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29926 to 28815. [2021-04-15 03:56:29,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28815 states, 28814 states have (on average 3.58617338793642) internal successors, (103332), 28814 states have internal predecessors, (103332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:56:29,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28815 states to 28815 states and 103332 transitions. [2021-04-15 03:56:29,764 INFO L78 Accepts]: Start accepts. Automaton has 28815 states and 103332 transitions. Word has length 23 [2021-04-15 03:56:29,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:56:29,764 INFO L480 AbstractCegarLoop]: Abstraction has 28815 states and 103332 transitions. [2021-04-15 03:56:29,764 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 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) [2021-04-15 03:56:29,764 INFO L276 IsEmpty]: Start isEmpty. Operand 28815 states and 103332 transitions. [2021-04-15 03:56:29,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-04-15 03:56:29,832 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:56:29,832 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:56:30,032 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:56:30,032 INFO L428 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:56:30,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:56:30,033 INFO L82 PathProgramCache]: Analyzing trace with hash -1807581121, now seen corresponding path program 41 times [2021-04-15 03:56:30,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:56:30,033 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358706757] [2021-04-15 03:56:30,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:56:30,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:56:30,079 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:56:30,079 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358706757] [2021-04-15 03:56:30,079 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451230817] [2021-04-15 03:56:30,080 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 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 [2021-04-15 03:56:30,113 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-04-15 03:56:30,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:56:30,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 03:56:30,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:56:30,170 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:56:30,171 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:56:30,171 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-04-15 03:56:30,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098890208] [2021-04-15 03:56:30,171 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-04-15 03:56:30,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:56:30,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-04-15 03:56:30,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-04-15 03:56:30,172 INFO L87 Difference]: Start difference. First operand 28815 states and 103332 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 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) [2021-04-15 03:56:30,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:56:30,605 INFO L93 Difference]: Finished difference Result 29526 states and 105293 transitions. [2021-04-15 03:56:30,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-04-15 03:56:30,605 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 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 23 [2021-04-15 03:56:30,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:56:30,729 INFO L225 Difference]: With dead ends: 29526 [2021-04-15 03:56:30,729 INFO L226 Difference]: Without dead ends: 29526 [2021-04-15 03:56:30,729 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 110.5ms TimeCoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-04-15 03:56:30,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29526 states. [2021-04-15 03:56:31,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29526 to 28856. [2021-04-15 03:56:31,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28856 states, 28855 states have (on average 3.585617743891873) internal successors, (103463), 28855 states have internal predecessors, (103463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:56:31,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28856 states to 28856 states and 103463 transitions. [2021-04-15 03:56:31,553 INFO L78 Accepts]: Start accepts. Automaton has 28856 states and 103463 transitions. Word has length 23 [2021-04-15 03:56:31,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:56:31,553 INFO L480 AbstractCegarLoop]: Abstraction has 28856 states and 103463 transitions. [2021-04-15 03:56:31,553 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 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) [2021-04-15 03:56:31,553 INFO L276 IsEmpty]: Start isEmpty. Operand 28856 states and 103463 transitions. [2021-04-15 03:56:31,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-04-15 03:56:31,610 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:56:31,610 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:56:31,811 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2021-04-15 03:56:31,811 INFO L428 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:56:31,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:56:31,812 INFO L82 PathProgramCache]: Analyzing trace with hash 817141951, now seen corresponding path program 16 times [2021-04-15 03:56:31,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:56:31,812 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494411912] [2021-04-15 03:56:31,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:56:31,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:56:31,883 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 03:56:31,883 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494411912] [2021-04-15 03:56:31,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924882778] [2021-04-15 03:56:31,884 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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 [2021-04-15 03:56:32,199 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 03:56:32,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:56:32,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 03:56:32,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:56:32,254 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 03:56:32,255 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:56:32,255 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-04-15 03:56:32,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472627187] [2021-04-15 03:56:32,255 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 03:56:32,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:56:32,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 03:56:32,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-04-15 03:56:32,256 INFO L87 Difference]: Start difference. First operand 28856 states and 103463 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) [2021-04-15 03:56:32,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:56:32,549 INFO L93 Difference]: Finished difference Result 29072 states and 104061 transitions. [2021-04-15 03:56:32,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 03:56:32,550 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 23 [2021-04-15 03:56:32,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:56:32,716 INFO L225 Difference]: With dead ends: 29072 [2021-04-15 03:56:32,716 INFO L226 Difference]: Without dead ends: 29019 [2021-04-15 03:56:32,716 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 20 SyntacticMatches, 5 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 62.1ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-04-15 03:56:32,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29019 states. [2021-04-15 03:56:33,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29019 to 28851. [2021-04-15 03:56:33,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28851 states, 28850 states have (on average 3.5844367417677643) internal successors, (103411), 28850 states have internal predecessors, (103411), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:56:33,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28851 states to 28851 states and 103411 transitions. [2021-04-15 03:56:33,607 INFO L78 Accepts]: Start accepts. Automaton has 28851 states and 103411 transitions. Word has length 23 [2021-04-15 03:56:33,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:56:33,607 INFO L480 AbstractCegarLoop]: Abstraction has 28851 states and 103411 transitions. [2021-04-15 03:56:33,608 INFO L481 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) [2021-04-15 03:56:33,608 INFO L276 IsEmpty]: Start isEmpty. Operand 28851 states and 103411 transitions. [2021-04-15 03:56:33,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-04-15 03:56:33,661 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:56:33,661 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:56:33,861 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2021-04-15 03:56:33,862 INFO L428 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:56:33,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:56:33,862 INFO L82 PathProgramCache]: Analyzing trace with hash 2049439803, now seen corresponding path program 42 times [2021-04-15 03:56:33,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:56:33,862 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135522774] [2021-04-15 03:56:33,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:56:33,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:56:33,906 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:56:33,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135522774] [2021-04-15 03:56:33,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967859287] [2021-04-15 03:56:33,907 INFO L93 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 [2021-04-15 03:56:33,937 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-04-15 03:56:33,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:56:33,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 03:56:33,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:56:34,008 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:56:34,009 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:56:34,009 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-04-15 03:56:34,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458571417] [2021-04-15 03:56:34,009 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 03:56:34,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:56:34,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 03:56:34,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-04-15 03:56:34,010 INFO L87 Difference]: Start difference. First operand 28851 states and 103411 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 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) [2021-04-15 03:56:34,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:56:34,626 INFO L93 Difference]: Finished difference Result 37800 states and 135115 transitions. [2021-04-15 03:56:34,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-04-15 03:56:34,626 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 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 23 [2021-04-15 03:56:34,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:56:34,786 INFO L225 Difference]: With dead ends: 37800 [2021-04-15 03:56:34,786 INFO L226 Difference]: Without dead ends: 37800 [2021-04-15 03:56:34,786 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 115.0ms TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2021-04-15 03:56:34,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37800 states. [2021-04-15 03:56:35,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37800 to 19949. [2021-04-15 03:56:35,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19949 states, 19948 states have (on average 3.5674754361339485) internal successors, (71164), 19948 states have internal predecessors, (71164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:56:35,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19949 states to 19949 states and 71164 transitions. [2021-04-15 03:56:35,545 INFO L78 Accepts]: Start accepts. Automaton has 19949 states and 71164 transitions. Word has length 23 [2021-04-15 03:56:35,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:56:35,545 INFO L480 AbstractCegarLoop]: Abstraction has 19949 states and 71164 transitions. [2021-04-15 03:56:35,545 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 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) [2021-04-15 03:56:35,545 INFO L276 IsEmpty]: Start isEmpty. Operand 19949 states and 71164 transitions. [2021-04-15 03:56:35,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-04-15 03:56:35,590 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:56:35,590 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:56:35,791 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:56:35,791 INFO L428 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:56:35,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:56:35,792 INFO L82 PathProgramCache]: Analyzing trace with hash -1759723389, now seen corresponding path program 43 times [2021-04-15 03:56:35,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:56:35,792 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923747609] [2021-04-15 03:56:35,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:56:35,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:56:35,830 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:56:35,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923747609] [2021-04-15 03:56:35,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601902122] [2021-04-15 03:56:35,830 INFO 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 [2021-04-15 03:56:35,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:56:35,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 03:56:35,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:56:35,912 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:56:35,913 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:56:35,913 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-04-15 03:56:35,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924848607] [2021-04-15 03:56:35,913 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 03:56:35,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:56:35,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 03:56:35,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-04-15 03:56:35,914 INFO L87 Difference]: Start difference. First operand 19949 states and 71164 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 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) [2021-04-15 03:56:36,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:56:36,691 INFO L93 Difference]: Finished difference Result 28786 states and 101970 transitions. [2021-04-15 03:56:36,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-04-15 03:56:36,692 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 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 23 [2021-04-15 03:56:36,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:56:36,823 INFO L225 Difference]: With dead ends: 28786 [2021-04-15 03:56:36,824 INFO L226 Difference]: Without dead ends: 28786 [2021-04-15 03:56:36,824 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 119.8ms TimeCoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2021-04-15 03:56:36,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28786 states. [2021-04-15 03:56:37,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28786 to 27373. [2021-04-15 03:56:37,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27373 states, 27372 states have (on average 3.5752228554727457) internal successors, (97861), 27372 states have internal predecessors, (97861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:56:37,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27373 states to 27373 states and 97861 transitions. [2021-04-15 03:56:37,587 INFO L78 Accepts]: Start accepts. Automaton has 27373 states and 97861 transitions. Word has length 23 [2021-04-15 03:56:37,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:56:37,588 INFO L480 AbstractCegarLoop]: Abstraction has 27373 states and 97861 transitions. [2021-04-15 03:56:37,588 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 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) [2021-04-15 03:56:37,588 INFO L276 IsEmpty]: Start isEmpty. Operand 27373 states and 97861 transitions. [2021-04-15 03:56:37,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-04-15 03:56:37,642 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:56:37,642 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:56:37,843 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:56:37,843 INFO L428 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:56:37,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:56:37,843 INFO L82 PathProgramCache]: Analyzing trace with hash 208892275, now seen corresponding path program 17 times [2021-04-15 03:56:37,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:56:37,844 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652185345] [2021-04-15 03:56:37,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:56:37,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:56:37,884 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-04-15 03:56:37,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652185345] [2021-04-15 03:56:37,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031789089] [2021-04-15 03:56:37,884 INFO L93 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 [2021-04-15 03:56:37,915 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-04-15 03:56:37,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:56:37,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 03:56:37,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:56:37,975 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-04-15 03:56:37,975 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:56:37,975 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-04-15 03:56:37,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373198199] [2021-04-15 03:56:37,976 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-04-15 03:56:37,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:56:37,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-04-15 03:56:37,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-04-15 03:56:37,978 INFO L87 Difference]: Start difference. First operand 27373 states and 97861 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 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) [2021-04-15 03:56:38,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:56:38,275 INFO L93 Difference]: Finished difference Result 27858 states and 99275 transitions. [2021-04-15 03:56:38,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-04-15 03:56:38,275 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 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 [2021-04-15 03:56:38,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:56:38,422 INFO L225 Difference]: With dead ends: 27858 [2021-04-15 03:56:38,423 INFO L226 Difference]: Without dead ends: 27777 [2021-04-15 03:56:38,423 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 32.9ms TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-04-15 03:56:38,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27777 states. [2021-04-15 03:56:39,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27777 to 27398. [2021-04-15 03:56:39,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27398 states, 27397 states have (on average 3.575135963791656) internal successors, (97948), 27397 states have internal predecessors, (97948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:56:39,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27398 states to 27398 states and 97948 transitions. [2021-04-15 03:56:39,384 INFO L78 Accepts]: Start accepts. Automaton has 27398 states and 97948 transitions. Word has length 23 [2021-04-15 03:56:39,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:56:39,384 INFO L480 AbstractCegarLoop]: Abstraction has 27398 states and 97948 transitions. [2021-04-15 03:56:39,384 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 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) [2021-04-15 03:56:39,384 INFO L276 IsEmpty]: Start isEmpty. Operand 27398 states and 97948 transitions. [2021-04-15 03:56:39,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-04-15 03:56:39,436 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:56:39,436 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:56:39,637 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:56:39,637 INFO L428 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:56:39,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:56:39,638 INFO L82 PathProgramCache]: Analyzing trace with hash 848779567, now seen corresponding path program 44 times [2021-04-15 03:56:39,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:56:39,638 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371831607] [2021-04-15 03:56:39,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:56:39,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:56:39,672 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:56:39,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371831607] [2021-04-15 03:56:39,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43655337] [2021-04-15 03:56:39,675 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-15 03:56:39,696 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 03:56:39,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:56:39,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 03:56:39,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:56:39,759 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:56:39,759 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:56:39,759 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-04-15 03:56:39,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999999624] [2021-04-15 03:56:39,760 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 03:56:39,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:56:39,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 03:56:39,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-04-15 03:56:39,760 INFO L87 Difference]: Start difference. First operand 27398 states and 97948 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 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) [2021-04-15 03:56:40,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:56:40,252 INFO L93 Difference]: Finished difference Result 38461 states and 138552 transitions. [2021-04-15 03:56:40,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 03:56:40,253 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 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 23 [2021-04-15 03:56:40,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:56:40,422 INFO L225 Difference]: With dead ends: 38461 [2021-04-15 03:56:40,422 INFO L226 Difference]: Without dead ends: 38461 [2021-04-15 03:56:40,422 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 123.5ms TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2021-04-15 03:56:40,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38461 states. [2021-04-15 03:56:41,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38461 to 24308. [2021-04-15 03:56:41,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24308 states, 24307 states have (on average 3.5794215658040893) internal successors, (87005), 24307 states have internal predecessors, (87005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:56:41,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24308 states to 24308 states and 87005 transitions. [2021-04-15 03:56:41,482 INFO L78 Accepts]: Start accepts. Automaton has 24308 states and 87005 transitions. Word has length 23 [2021-04-15 03:56:41,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:56:41,482 INFO L480 AbstractCegarLoop]: Abstraction has 24308 states and 87005 transitions. [2021-04-15 03:56:41,482 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 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) [2021-04-15 03:56:41,483 INFO L276 IsEmpty]: Start isEmpty. Operand 24308 states and 87005 transitions. [2021-04-15 03:56:41,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-04-15 03:56:41,537 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:56:41,537 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:56:41,737 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:56:41,738 INFO L428 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:56:41,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:56:41,738 INFO L82 PathProgramCache]: Analyzing trace with hash 1907900651, now seen corresponding path program 18 times [2021-04-15 03:56:41,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:56:41,739 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996430089] [2021-04-15 03:56:41,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:56:41,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:56:41,808 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 03:56:41,808 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996430089] [2021-04-15 03:56:41,808 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535944282] [2021-04-15 03:56:41,809 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2021-04-15 03:56:41,832 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-04-15 03:56:41,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:56:41,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 03:56:41,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:56:41,888 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 03:56:41,889 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:56:41,889 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-04-15 03:56:41,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280538820] [2021-04-15 03:56:41,889 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 03:56:41,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:56:41,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 03:56:41,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-04-15 03:56:41,897 INFO L87 Difference]: Start difference. First operand 24308 states and 87005 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) [2021-04-15 03:56:42,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:56:42,125 INFO L93 Difference]: Finished difference Result 24924 states and 88837 transitions. [2021-04-15 03:56:42,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 03:56:42,125 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 23 [2021-04-15 03:56:42,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:56:42,226 INFO L225 Difference]: With dead ends: 24924 [2021-04-15 03:56:42,226 INFO L226 Difference]: Without dead ends: 24835 [2021-04-15 03:56:42,226 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 54.8ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-04-15 03:56:42,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24835 states. [2021-04-15 03:56:43,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24835 to 24301. [2021-04-15 03:56:43,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24301 states, 24300 states have (on average 3.579835390946502) internal successors, (86990), 24300 states have internal predecessors, (86990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:56:43,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24301 states to 24301 states and 86990 transitions. [2021-04-15 03:56:43,181 INFO L78 Accepts]: Start accepts. Automaton has 24301 states and 86990 transitions. Word has length 23 [2021-04-15 03:56:43,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:56:43,182 INFO L480 AbstractCegarLoop]: Abstraction has 24301 states and 86990 transitions. [2021-04-15 03:56:43,182 INFO L481 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) [2021-04-15 03:56:43,182 INFO L276 IsEmpty]: Start isEmpty. Operand 24301 states and 86990 transitions. [2021-04-15 03:56:43,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-04-15 03:56:43,237 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:56:43,237 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:56:43,438 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-04-15 03:56:43,438 INFO L428 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:56:43,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:56:43,438 INFO L82 PathProgramCache]: Analyzing trace with hash 2012461191, now seen corresponding path program 19 times [2021-04-15 03:56:43,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:56:43,439 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613679034] [2021-04-15 03:56:43,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:56:43,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:56:43,532 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 03:56:43,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613679034] [2021-04-15 03:56:43,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680916320] [2021-04-15 03:56:43,533 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2021-04-15 03:56:43,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:56:43,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 03:56:43,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:56:43,610 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-04-15 03:56:43,610 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:56:43,611 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-04-15 03:56:43,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008655231] [2021-04-15 03:56:43,611 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 03:56:43,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:56:43,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 03:56:43,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-04-15 03:56:43,612 INFO L87 Difference]: Start difference. First operand 24301 states and 86990 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 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) [2021-04-15 03:56:43,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:56:43,855 INFO L93 Difference]: Finished difference Result 24748 states and 88285 transitions. [2021-04-15 03:56:43,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 03:56:43,855 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 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 [2021-04-15 03:56:43,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:56:43,965 INFO L225 Difference]: With dead ends: 24748 [2021-04-15 03:56:43,965 INFO L226 Difference]: Without dead ends: 24675 [2021-04-15 03:56:43,966 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 21 SyntacticMatches, 4 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 61.5ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-04-15 03:56:43,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24675 states. [2021-04-15 03:56:44,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24675 to 24351. [2021-04-15 03:56:44,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24351 states, 24350 states have (on average 3.5791786447638603) internal successors, (87153), 24350 states have internal predecessors, (87153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:56:44,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24351 states to 24351 states and 87153 transitions. [2021-04-15 03:56:44,629 INFO L78 Accepts]: Start accepts. Automaton has 24351 states and 87153 transitions. Word has length 23 [2021-04-15 03:56:44,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:56:44,629 INFO L480 AbstractCegarLoop]: Abstraction has 24351 states and 87153 transitions. [2021-04-15 03:56:44,630 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 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) [2021-04-15 03:56:44,630 INFO L276 IsEmpty]: Start isEmpty. Operand 24351 states and 87153 transitions. [2021-04-15 03:56:44,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-04-15 03:56:44,680 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:56:44,680 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:56:44,881 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-04-15 03:56:44,881 INFO L428 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:56:44,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:56:44,881 INFO L82 PathProgramCache]: Analyzing trace with hash 1545638063, now seen corresponding path program 20 times [2021-04-15 03:56:44,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:56:44,881 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418391832] [2021-04-15 03:56:44,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:56:44,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:56:44,934 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 03:56:44,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418391832] [2021-04-15 03:56:44,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537148768] [2021-04-15 03:56:44,934 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_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 [2021-04-15 03:56:44,966 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 03:56:44,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:56:44,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 03:56:44,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:56:45,020 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 03:56:45,020 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:56:45,021 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-04-15 03:56:45,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378199474] [2021-04-15 03:56:45,021 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 03:56:45,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:56:45,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 03:56:45,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-04-15 03:56:45,021 INFO L87 Difference]: Start difference. First operand 24351 states and 87153 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) [2021-04-15 03:56:45,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:56:45,514 INFO L93 Difference]: Finished difference Result 24905 states and 88675 transitions. [2021-04-15 03:56:45,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 03:56:45,515 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 23 [2021-04-15 03:56:45,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:56:45,617 INFO L225 Difference]: With dead ends: 24905 [2021-04-15 03:56:45,618 INFO L226 Difference]: Without dead ends: 24844 [2021-04-15 03:56:45,618 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 20 SyntacticMatches, 5 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 47.5ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-04-15 03:56:45,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24844 states. [2021-04-15 03:56:46,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24844 to 24401. [2021-04-15 03:56:46,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24401 states, 24400 states have (on average 3.5781147540983604) internal successors, (87306), 24400 states have internal predecessors, (87306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:56:46,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24401 states to 24401 states and 87306 transitions. [2021-04-15 03:56:46,230 INFO L78 Accepts]: Start accepts. Automaton has 24401 states and 87306 transitions. Word has length 23 [2021-04-15 03:56:46,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:56:46,231 INFO L480 AbstractCegarLoop]: Abstraction has 24401 states and 87306 transitions. [2021-04-15 03:56:46,231 INFO L481 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) [2021-04-15 03:56:46,231 INFO L276 IsEmpty]: Start isEmpty. Operand 24401 states and 87306 transitions. [2021-04-15 03:56:46,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-04-15 03:56:46,283 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:56:46,283 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:56:46,483 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-04-15 03:56:46,484 INFO L428 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:56:46,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:56:46,484 INFO L82 PathProgramCache]: Analyzing trace with hash 322190439, now seen corresponding path program 45 times [2021-04-15 03:56:46,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:56:46,484 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134851430] [2021-04-15 03:56:46,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:56:46,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:56:46,520 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:56:46,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134851430] [2021-04-15 03:56:46,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625262881] [2021-04-15 03:56:46,520 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 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 [2021-04-15 03:56:46,541 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-04-15 03:56:46,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:56:46,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2021-04-15 03:56:46,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:56:46,608 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:56:46,608 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:56:46,608 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-04-15 03:56:46,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962496741] [2021-04-15 03:56:46,609 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 03:56:46,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:56:46,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 03:56:46,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-04-15 03:56:46,609 INFO L87 Difference]: Start difference. First operand 24401 states and 87306 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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) [2021-04-15 03:56:47,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:56:47,541 INFO L93 Difference]: Finished difference Result 66091 states and 236252 transitions. [2021-04-15 03:56:47,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-04-15 03:56:47,543 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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 23 [2021-04-15 03:56:47,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:56:47,843 INFO L225 Difference]: With dead ends: 66091 [2021-04-15 03:56:47,843 INFO L226 Difference]: Without dead ends: 66077 [2021-04-15 03:56:47,843 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 85.0ms TimeCoverageRelationStatistics Valid=79, Invalid=131, Unknown=0, NotChecked=0, Total=210 [2021-04-15 03:56:47,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66077 states. [2021-04-15 03:56:49,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66077 to 64280. [2021-04-15 03:56:49,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64280 states, 64279 states have (on average 3.5925574448886883) internal successors, (230926), 64279 states have internal predecessors, (230926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:56:49,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64280 states to 64280 states and 230926 transitions. [2021-04-15 03:56:49,806 INFO L78 Accepts]: Start accepts. Automaton has 64280 states and 230926 transitions. Word has length 23 [2021-04-15 03:56:49,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:56:49,806 INFO L480 AbstractCegarLoop]: Abstraction has 64280 states and 230926 transitions. [2021-04-15 03:56:49,806 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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) [2021-04-15 03:56:49,806 INFO L276 IsEmpty]: Start isEmpty. Operand 64280 states and 230926 transitions. [2021-04-15 03:56:49,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-04-15 03:56:49,915 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:56:49,915 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:56:50,115 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-04-15 03:56:50,116 INFO L428 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:56:50,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:56:50,116 INFO L82 PathProgramCache]: Analyzing trace with hash 749275825, now seen corresponding path program 21 times [2021-04-15 03:56:50,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:56:50,116 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908363395] [2021-04-15 03:56:50,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:56:50,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:56:50,180 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:56:50,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908363395] [2021-04-15 03:56:50,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106802721] [2021-04-15 03:56:50,181 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2021-04-15 03:56:50,202 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-04-15 03:56:50,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:56:50,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 13 conjunts are in the unsatisfiable core [2021-04-15 03:56:50,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:56:50,267 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:56:50,268 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:56:50,268 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-04-15 03:56:50,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134989728] [2021-04-15 03:56:50,268 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-04-15 03:56:50,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:56:50,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-04-15 03:56:50,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-04-15 03:56:50,269 INFO L87 Difference]: Start difference. First operand 64280 states and 230926 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) [2021-04-15 03:56:50,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:56:50,762 INFO L93 Difference]: Finished difference Result 64761 states and 232372 transitions. [2021-04-15 03:56:50,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-04-15 03:56:50,763 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 23 [2021-04-15 03:56:50,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:56:51,068 INFO L225 Difference]: With dead ends: 64761 [2021-04-15 03:56:51,069 INFO L226 Difference]: Without dead ends: 64712 [2021-04-15 03:56:51,069 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 20 SyntacticMatches, 5 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 55.4ms TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-04-15 03:56:51,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64712 states. [2021-04-15 03:56:52,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64712 to 64330. [2021-04-15 03:56:52,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64330 states, 64329 states have (on average 3.592516594382005) internal successors, (231103), 64329 states have internal predecessors, (231103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:56:53,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64330 states to 64330 states and 231103 transitions. [2021-04-15 03:56:53,851 INFO L78 Accepts]: Start accepts. Automaton has 64330 states and 231103 transitions. Word has length 23 [2021-04-15 03:56:53,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:56:53,851 INFO L480 AbstractCegarLoop]: Abstraction has 64330 states and 231103 transitions. [2021-04-15 03:56:53,851 INFO L481 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) [2021-04-15 03:56:53,851 INFO L276 IsEmpty]: Start isEmpty. Operand 64330 states and 231103 transitions. [2021-04-15 03:56:53,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 03:56:53,978 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:56:53,978 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:56:54,179 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2021-04-15 03:56:54,179 INFO L428 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:56:54,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:56:54,180 INFO L82 PathProgramCache]: Analyzing trace with hash -854673189, now seen corresponding path program 21 times [2021-04-15 03:56:54,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:56:54,180 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452104525] [2021-04-15 03:56:54,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:56:54,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:56:54,221 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:56:54,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452104525] [2021-04-15 03:56:54,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281803680] [2021-04-15 03:56:54,221 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2021-04-15 03:56:54,243 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-04-15 03:56:54,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:56:54,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 8 conjunts are in the unsatisfiable core [2021-04-15 03:56:54,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:56:54,304 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:56:54,304 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:56:54,304 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-04-15 03:56:54,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964759872] [2021-04-15 03:56:54,304 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 03:56:54,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:56:54,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 03:56:54,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-04-15 03:56:54,305 INFO L87 Difference]: Start difference. First operand 64330 states and 231103 transitions. Second operand has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 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) [2021-04-15 03:56:55,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:56:55,392 INFO L93 Difference]: Finished difference Result 123260 states and 445775 transitions. [2021-04-15 03:56:55,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 03:56:55,393 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 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 25 [2021-04-15 03:56:55,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:56:56,649 INFO L225 Difference]: With dead ends: 123260 [2021-04-15 03:56:56,650 INFO L226 Difference]: Without dead ends: 123260 [2021-04-15 03:56:56,650 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 117.3ms TimeCoverageRelationStatistics Valid=122, Invalid=258, Unknown=0, NotChecked=0, Total=380 [2021-04-15 03:56:56,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123260 states. [2021-04-15 03:56:58,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123260 to 75397. [2021-04-15 03:56:58,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75397 states, 75396 states have (on average 3.5951376730861053) internal successors, (271059), 75396 states have internal predecessors, (271059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:56:59,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75397 states to 75397 states and 271059 transitions. [2021-04-15 03:56:59,342 INFO L78 Accepts]: Start accepts. Automaton has 75397 states and 271059 transitions. Word has length 25 [2021-04-15 03:56:59,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:56:59,342 INFO L480 AbstractCegarLoop]: Abstraction has 75397 states and 271059 transitions. [2021-04-15 03:56:59,342 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 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) [2021-04-15 03:56:59,342 INFO L276 IsEmpty]: Start isEmpty. Operand 75397 states and 271059 transitions. [2021-04-15 03:56:59,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 03:56:59,498 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:56:59,499 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:56:59,702 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:56:59,702 INFO L428 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:56:59,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:56:59,703 INFO L82 PathProgramCache]: Analyzing trace with hash 1488955305, now seen corresponding path program 46 times [2021-04-15 03:56:59,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:56:59,703 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607618996] [2021-04-15 03:56:59,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:56:59,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:56:59,779 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:56:59,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607618996] [2021-04-15 03:56:59,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834152949] [2021-04-15 03:56:59,780 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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 [2021-04-15 03:56:59,800 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 03:56:59,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:56:59,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 03:56:59,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:56:59,861 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:56:59,861 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:56:59,861 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-04-15 03:56:59,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228233591] [2021-04-15 03:56:59,862 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-04-15 03:56:59,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:56:59,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-04-15 03:56:59,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-04-15 03:56:59,862 INFO L87 Difference]: Start difference. First operand 75397 states and 271059 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 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) [2021-04-15 03:57:01,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:57:01,108 INFO L93 Difference]: Finished difference Result 76364 states and 274028 transitions. [2021-04-15 03:57:01,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-04-15 03:57:01,109 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 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 25 [2021-04-15 03:57:01,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:57:01,499 INFO L225 Difference]: With dead ends: 76364 [2021-04-15 03:57:01,500 INFO L226 Difference]: Without dead ends: 76324 [2021-04-15 03:57:01,500 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 68.4ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-04-15 03:57:01,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76324 states. [2021-04-15 03:57:03,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76324 to 75532. [2021-04-15 03:57:03,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75532 states, 75531 states have (on average 3.5951993221326344) internal successors, (271549), 75531 states have internal predecessors, (271549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:57:03,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75532 states to 75532 states and 271549 transitions. [2021-04-15 03:57:03,920 INFO L78 Accepts]: Start accepts. Automaton has 75532 states and 271549 transitions. Word has length 25 [2021-04-15 03:57:03,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:57:03,920 INFO L480 AbstractCegarLoop]: Abstraction has 75532 states and 271549 transitions. [2021-04-15 03:57:03,920 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 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) [2021-04-15 03:57:03,920 INFO L276 IsEmpty]: Start isEmpty. Operand 75532 states and 271549 transitions. [2021-04-15 03:57:04,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 03:57:04,089 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:57:04,089 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:57:04,296 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:57:04,296 INFO L428 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:57:04,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:57:04,297 INFO L82 PathProgramCache]: Analyzing trace with hash 608516245, now seen corresponding path program 47 times [2021-04-15 03:57:04,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:57:04,297 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744436960] [2021-04-15 03:57:04,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:57:04,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:57:04,375 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:57:04,375 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744436960] [2021-04-15 03:57:04,375 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450682632] [2021-04-15 03:57:04,375 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-15 03:57:04,400 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-04-15 03:57:04,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:57:04,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 03:57:04,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:57:04,452 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:57:04,452 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:57:04,453 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-04-15 03:57:04,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556506486] [2021-04-15 03:57:04,453 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-04-15 03:57:04,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:57:04,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-04-15 03:57:04,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-04-15 03:57:04,454 INFO L87 Difference]: Start difference. First operand 75532 states and 271549 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 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) [2021-04-15 03:57:05,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:57:05,674 INFO L93 Difference]: Finished difference Result 77328 states and 277251 transitions. [2021-04-15 03:57:05,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-04-15 03:57:05,674 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 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 25 [2021-04-15 03:57:05,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:57:06,111 INFO L225 Difference]: With dead ends: 77328 [2021-04-15 03:57:06,111 INFO L226 Difference]: Without dead ends: 77263 [2021-04-15 03:57:06,111 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 69.9ms TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-04-15 03:57:06,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77263 states. [2021-04-15 03:57:08,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77263 to 75779. [2021-04-15 03:57:08,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75779 states, 75778 states have (on average 3.595476259600412) internal successors, (272458), 75778 states have internal predecessors, (272458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:57:08,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75779 states to 75779 states and 272458 transitions. [2021-04-15 03:57:08,453 INFO L78 Accepts]: Start accepts. Automaton has 75779 states and 272458 transitions. Word has length 25 [2021-04-15 03:57:08,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:57:08,454 INFO L480 AbstractCegarLoop]: Abstraction has 75779 states and 272458 transitions. [2021-04-15 03:57:08,454 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 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) [2021-04-15 03:57:08,454 INFO L276 IsEmpty]: Start isEmpty. Operand 75779 states and 272458 transitions. [2021-04-15 03:57:08,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 03:57:08,616 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:57:08,616 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:57:08,816 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-04-15 03:57:08,817 INFO L428 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:57:08,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:57:08,817 INFO L82 PathProgramCache]: Analyzing trace with hash -924915699, now seen corresponding path program 48 times [2021-04-15 03:57:08,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:57:08,817 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431242601] [2021-04-15 03:57:08,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:57:08,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:57:08,869 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:57:08,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431242601] [2021-04-15 03:57:08,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343193189] [2021-04-15 03:57:08,869 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2021-04-15 03:57:08,890 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-04-15 03:57:08,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:57:08,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 03:57:08,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:57:08,958 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:57:08,959 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:57:08,959 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-04-15 03:57:08,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503922344] [2021-04-15 03:57:08,959 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-04-15 03:57:08,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:57:08,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-04-15 03:57:08,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-04-15 03:57:08,960 INFO L87 Difference]: Start difference. First operand 75779 states and 272458 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-04-15 03:57:09,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:57:09,479 INFO L93 Difference]: Finished difference Result 77024 states and 276140 transitions. [2021-04-15 03:57:09,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-04-15 03:57:09,479 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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 25 [2021-04-15 03:57:09,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:57:10,425 INFO L225 Difference]: With dead ends: 77024 [2021-04-15 03:57:10,426 INFO L226 Difference]: Without dead ends: 76999 [2021-04-15 03:57:10,426 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 7 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 52.7ms TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-04-15 03:57:10,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76999 states. [2021-04-15 03:57:12,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76999 to 75956. [2021-04-15 03:57:12,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75956 states, 75955 states have (on average 3.595707984991113) internal successors, (273112), 75955 states have internal predecessors, (273112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:57:12,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75956 states to 75956 states and 273112 transitions. [2021-04-15 03:57:12,702 INFO L78 Accepts]: Start accepts. Automaton has 75956 states and 273112 transitions. Word has length 25 [2021-04-15 03:57:12,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:57:12,702 INFO L480 AbstractCegarLoop]: Abstraction has 75956 states and 273112 transitions. [2021-04-15 03:57:12,702 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-04-15 03:57:12,702 INFO L276 IsEmpty]: Start isEmpty. Operand 75956 states and 273112 transitions. [2021-04-15 03:57:12,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 03:57:12,858 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:57:12,858 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:57:13,060 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,92 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:57:13,061 INFO L428 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:57:13,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:57:13,062 INFO L82 PathProgramCache]: Analyzing trace with hash -1967521705, now seen corresponding path program 49 times [2021-04-15 03:57:13,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:57:13,062 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847808746] [2021-04-15 03:57:13,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:57:13,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:57:13,132 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:57:13,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847808746] [2021-04-15 03:57:13,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145207576] [2021-04-15 03:57:13,132 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 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 [2021-04-15 03:57:13,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:57:13,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 03:57:13,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:57:13,213 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:57:13,213 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:57:13,213 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-04-15 03:57:13,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091918865] [2021-04-15 03:57:13,213 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-04-15 03:57:13,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:57:13,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-04-15 03:57:13,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-04-15 03:57:13,214 INFO L87 Difference]: Start difference. First operand 75956 states and 273112 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-04-15 03:57:13,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:57:13,816 INFO L93 Difference]: Finished difference Result 77120 states and 276543 transitions. [2021-04-15 03:57:13,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-04-15 03:57:13,817 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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 25 [2021-04-15 03:57:13,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:57:14,187 INFO L225 Difference]: With dead ends: 77120 [2021-04-15 03:57:14,188 INFO L226 Difference]: Without dead ends: 77074 [2021-04-15 03:57:14,188 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 61.2ms TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-04-15 03:57:14,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77074 states. [2021-04-15 03:57:16,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77074 to 76028. [2021-04-15 03:57:17,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76028 states, 76027 states have (on average 3.596209241453694) internal successors, (273409), 76027 states have internal predecessors, (273409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:57:17,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76028 states to 76028 states and 273409 transitions. [2021-04-15 03:57:17,465 INFO L78 Accepts]: Start accepts. Automaton has 76028 states and 273409 transitions. Word has length 25 [2021-04-15 03:57:17,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:57:17,465 INFO L480 AbstractCegarLoop]: Abstraction has 76028 states and 273409 transitions. [2021-04-15 03:57:17,465 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-04-15 03:57:17,465 INFO L276 IsEmpty]: Start isEmpty. Operand 76028 states and 273409 transitions. [2021-04-15 03:57:17,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 03:57:17,632 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:57:17,633 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:57:17,833 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:57:17,833 INFO L428 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:57:17,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:57:17,834 INFO L82 PathProgramCache]: Analyzing trace with hash 1225531439, now seen corresponding path program 50 times [2021-04-15 03:57:17,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:57:17,834 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492043767] [2021-04-15 03:57:17,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:57:17,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:57:17,910 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 03:57:17,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492043767] [2021-04-15 03:57:17,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346910657] [2021-04-15 03:57:17,911 INFO L93 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 [2021-04-15 03:57:17,932 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 03:57:17,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:57:17,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 03:57:17,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:57:17,993 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 03:57:17,994 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:57:17,994 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-04-15 03:57:17,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190048719] [2021-04-15 03:57:17,994 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-04-15 03:57:17,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:57:17,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-04-15 03:57:17,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-04-15 03:57:17,995 INFO L87 Difference]: Start difference. First operand 76028 states and 273409 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-04-15 03:57:18,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:57:18,609 INFO L93 Difference]: Finished difference Result 77628 states and 278332 transitions. [2021-04-15 03:57:18,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-04-15 03:57:18,610 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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 25 [2021-04-15 03:57:18,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:57:18,968 INFO L225 Difference]: With dead ends: 77628 [2021-04-15 03:57:18,969 INFO L226 Difference]: Without dead ends: 77580 [2021-04-15 03:57:18,969 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 69.3ms TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-04-15 03:57:19,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77580 states. [2021-04-15 03:57:21,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77580 to 76129. [2021-04-15 03:57:21,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76129 states, 76128 states have (on average 3.596876313577133) internal successors, (273823), 76128 states have internal predecessors, (273823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:57:21,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76129 states to 76129 states and 273823 transitions. [2021-04-15 03:57:21,935 INFO L78 Accepts]: Start accepts. Automaton has 76129 states and 273823 transitions. Word has length 25 [2021-04-15 03:57:21,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:57:21,935 INFO L480 AbstractCegarLoop]: Abstraction has 76129 states and 273823 transitions. [2021-04-15 03:57:21,935 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 7 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) [2021-04-15 03:57:21,935 INFO L276 IsEmpty]: Start isEmpty. Operand 76129 states and 273823 transitions. [2021-04-15 03:57:22,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 03:57:22,116 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:57:22,117 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:57:22,318 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,94 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:57:22,319 INFO L428 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:57:22,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:57:22,319 INFO L82 PathProgramCache]: Analyzing trace with hash -1862961165, now seen corresponding path program 51 times [2021-04-15 03:57:22,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:57:22,319 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752064112] [2021-04-15 03:57:22,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:57:22,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:57:22,421 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:57:22,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752064112] [2021-04-15 03:57:22,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567084271] [2021-04-15 03:57:22,422 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2021-04-15 03:57:22,445 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-04-15 03:57:22,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:57:22,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2021-04-15 03:57:22,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:57:22,500 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:57:22,501 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:57:22,501 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-04-15 03:57:22,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568619542] [2021-04-15 03:57:22,501 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-04-15 03:57:22,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:57:22,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-04-15 03:57:22,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-04-15 03:57:22,502 INFO L87 Difference]: Start difference. First operand 76129 states and 273823 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 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) [2021-04-15 03:57:23,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:57:23,126 INFO L93 Difference]: Finished difference Result 79341 states and 284167 transitions. [2021-04-15 03:57:23,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-04-15 03:57:23,126 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 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 25 [2021-04-15 03:57:23,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:57:23,503 INFO L225 Difference]: With dead ends: 79341 [2021-04-15 03:57:23,504 INFO L226 Difference]: Without dead ends: 79297 [2021-04-15 03:57:23,504 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 82.8ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-04-15 03:57:23,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79297 states. [2021-04-15 03:57:26,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79297 to 76278. [2021-04-15 03:57:26,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76278 states, 76277 states have (on average 3.598096411762392) internal successors, (274452), 76277 states have internal predecessors, (274452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:57:27,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76278 states to 76278 states and 274452 transitions. [2021-04-15 03:57:27,001 INFO L78 Accepts]: Start accepts. Automaton has 76278 states and 274452 transitions. Word has length 25 [2021-04-15 03:57:27,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:57:27,001 INFO L480 AbstractCegarLoop]: Abstraction has 76278 states and 274452 transitions. [2021-04-15 03:57:27,001 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 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) [2021-04-15 03:57:27,001 INFO L276 IsEmpty]: Start isEmpty. Operand 76278 states and 274452 transitions. [2021-04-15 03:57:27,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 03:57:27,184 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:57:27,185 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:57:27,385 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:57:27,385 INFO L428 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:57:27,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:57:27,386 INFO L82 PathProgramCache]: Analyzing trace with hash -1408824429, now seen corresponding path program 22 times [2021-04-15 03:57:27,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:57:27,386 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766781031] [2021-04-15 03:57:27,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:57:27,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:57:27,432 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:57:27,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766781031] [2021-04-15 03:57:27,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720309803] [2021-04-15 03:57:27,432 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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) [2021-04-15 03:57:27,470 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 03:57:27,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:57:27,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 8 conjunts are in the unsatisfiable core [2021-04-15 03:57:27,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:57:27,547 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:57:27,548 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:57:27,548 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-04-15 03:57:27,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670541828] [2021-04-15 03:57:27,548 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 03:57:27,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:57:27,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 03:57:27,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-04-15 03:57:27,549 INFO L87 Difference]: Start difference. First operand 76278 states and 274452 transitions. Second operand has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 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) [2021-04-15 03:57:28,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:57:28,561 INFO L93 Difference]: Finished difference Result 98993 states and 359845 transitions. [2021-04-15 03:57:28,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-04-15 03:57:28,562 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 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 25 [2021-04-15 03:57:28,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:57:29,039 INFO L225 Difference]: With dead ends: 98993 [2021-04-15 03:57:29,039 INFO L226 Difference]: Without dead ends: 98979 [2021-04-15 03:57:29,040 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 129.5ms TimeCoverageRelationStatistics Valid=109, Invalid=233, Unknown=0, NotChecked=0, Total=342 [2021-04-15 03:57:29,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98979 states. [2021-04-15 03:57:30,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98979 to 21029. [2021-04-15 03:57:30,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21029 states, 21028 states have (on average 3.6255468898611376) internal successors, (76238), 21028 states have internal predecessors, (76238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:57:30,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21029 states to 21029 states and 76238 transitions. [2021-04-15 03:57:30,823 INFO L78 Accepts]: Start accepts. Automaton has 21029 states and 76238 transitions. Word has length 25 [2021-04-15 03:57:30,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:57:30,823 INFO L480 AbstractCegarLoop]: Abstraction has 21029 states and 76238 transitions. [2021-04-15 03:57:30,823 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 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) [2021-04-15 03:57:30,824 INFO L276 IsEmpty]: Start isEmpty. Operand 21029 states and 76238 transitions. [2021-04-15 03:57:30,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 03:57:30,871 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:57:30,871 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:57:31,071 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2021-04-15 03:57:31,071 INFO L428 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:57:31,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:57:31,072 INFO L82 PathProgramCache]: Analyzing trace with hash -1278968941, now seen corresponding path program 23 times [2021-04-15 03:57:31,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:57:31,072 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72245282] [2021-04-15 03:57:31,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:57:31,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:57:31,115 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:57:31,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72245282] [2021-04-15 03:57:31,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388099052] [2021-04-15 03:57:31,115 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_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 [2021-04-15 03:57:31,162 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-04-15 03:57:31,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:57:31,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 8 conjunts are in the unsatisfiable core [2021-04-15 03:57:31,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:57:31,244 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:57:31,244 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:57:31,244 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-04-15 03:57:31,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019230046] [2021-04-15 03:57:31,244 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 03:57:31,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:57:31,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 03:57:31,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-04-15 03:57:31,245 INFO L87 Difference]: Start difference. First operand 21029 states and 76238 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 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) [2021-04-15 03:57:32,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:57:32,226 INFO L93 Difference]: Finished difference Result 52085 states and 187899 transitions. [2021-04-15 03:57:32,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-04-15 03:57:32,227 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 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 25 [2021-04-15 03:57:32,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:57:32,460 INFO L225 Difference]: With dead ends: 52085 [2021-04-15 03:57:32,460 INFO L226 Difference]: Without dead ends: 52085 [2021-04-15 03:57:32,461 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 128.6ms TimeCoverageRelationStatistics Valid=122, Invalid=220, Unknown=0, NotChecked=0, Total=342 [2021-04-15 03:57:32,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52085 states. [2021-04-15 03:57:33,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52085 to 48537. [2021-04-15 03:57:33,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48537 states, 48536 states have (on average 3.635569474204714) internal successors, (176456), 48536 states have internal predecessors, (176456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:57:34,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48537 states to 48537 states and 176456 transitions. [2021-04-15 03:57:34,236 INFO L78 Accepts]: Start accepts. Automaton has 48537 states and 176456 transitions. Word has length 25 [2021-04-15 03:57:34,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:57:34,236 INFO L480 AbstractCegarLoop]: Abstraction has 48537 states and 176456 transitions. [2021-04-15 03:57:34,236 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 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) [2021-04-15 03:57:34,236 INFO L276 IsEmpty]: Start isEmpty. Operand 48537 states and 176456 transitions. [2021-04-15 03:57:34,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 03:57:34,355 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:57:34,355 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:57:34,556 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-04-15 03:57:34,556 INFO L428 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:57:34,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:57:34,556 INFO L82 PathProgramCache]: Analyzing trace with hash -793164837, now seen corresponding path program 24 times [2021-04-15 03:57:34,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:57:34,557 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232147715] [2021-04-15 03:57:34,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:57:34,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:57:34,602 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:57:34,603 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232147715] [2021-04-15 03:57:34,603 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817358739] [2021-04-15 03:57:34,603 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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) [2021-04-15 03:57:34,642 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-04-15 03:57:34,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:57:34,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 8 conjunts are in the unsatisfiable core [2021-04-15 03:57:34,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:57:34,743 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:57:34,744 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:57:34,744 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-04-15 03:57:34,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681411461] [2021-04-15 03:57:34,744 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 03:57:34,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:57:34,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 03:57:34,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-04-15 03:57:34,745 INFO L87 Difference]: Start difference. First operand 48537 states and 176456 transitions. Second operand has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 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) [2021-04-15 03:57:35,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:57:35,416 INFO L93 Difference]: Finished difference Result 60283 states and 218124 transitions. [2021-04-15 03:57:35,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-04-15 03:57:35,417 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 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 25 [2021-04-15 03:57:35,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:57:35,703 INFO L225 Difference]: With dead ends: 60283 [2021-04-15 03:57:35,703 INFO L226 Difference]: Without dead ends: 60283 [2021-04-15 03:57:35,703 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 155.5ms TimeCoverageRelationStatistics Valid=126, Invalid=294, Unknown=0, NotChecked=0, Total=420 [2021-04-15 03:57:35,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60283 states. [2021-04-15 03:57:37,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60283 to 48697. [2021-04-15 03:57:37,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48697 states, 48696 states have (on average 3.6408739937571872) internal successors, (177296), 48696 states have internal predecessors, (177296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:57:37,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48697 states to 48697 states and 177296 transitions. [2021-04-15 03:57:37,424 INFO L78 Accepts]: Start accepts. Automaton has 48697 states and 177296 transitions. Word has length 25 [2021-04-15 03:57:37,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:57:37,424 INFO L480 AbstractCegarLoop]: Abstraction has 48697 states and 177296 transitions. [2021-04-15 03:57:37,424 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7142857142857144) internal successors, (38), 13 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) [2021-04-15 03:57:37,424 INFO L276 IsEmpty]: Start isEmpty. Operand 48697 states and 177296 transitions. [2021-04-15 03:57:37,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 03:57:37,534 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:57:37,534 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:57:37,734 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-04-15 03:57:37,734 INFO L428 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:57:37,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:57:37,735 INFO L82 PathProgramCache]: Analyzing trace with hash -1183569831, now seen corresponding path program 52 times [2021-04-15 03:57:37,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:57:37,735 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842204817] [2021-04-15 03:57:37,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:57:37,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:57:37,843 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:57:37,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842204817] [2021-04-15 03:57:37,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872298019] [2021-04-15 03:57:37,843 INFO L93 rtionOrderModulation]: Changing 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 [2021-04-15 03:57:37,867 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 03:57:37,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:57:37,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2021-04-15 03:57:37,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:57:38,005 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:57:38,005 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:57:38,005 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-04-15 03:57:38,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751024791] [2021-04-15 03:57:38,005 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 03:57:38,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:57:38,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 03:57:38,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-04-15 03:57:38,006 INFO L87 Difference]: Start difference. First operand 48697 states and 177296 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 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) [2021-04-15 03:57:38,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:57:38,574 INFO L93 Difference]: Finished difference Result 49947 states and 180898 transitions. [2021-04-15 03:57:38,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-04-15 03:57:38,575 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 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 25 [2021-04-15 03:57:38,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:57:38,797 INFO L225 Difference]: With dead ends: 49947 [2021-04-15 03:57:38,797 INFO L226 Difference]: Without dead ends: 49819 [2021-04-15 03:57:38,798 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 204.8ms TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-04-15 03:57:38,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49819 states. [2021-04-15 03:57:40,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49819 to 48821. [2021-04-15 03:57:40,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48821 states, 48820 states have (on average 3.6405981155264238) internal successors, (177734), 48820 states have internal predecessors, (177734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:57:40,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48821 states to 48821 states and 177734 transitions. [2021-04-15 03:57:40,564 INFO L78 Accepts]: Start accepts. Automaton has 48821 states and 177734 transitions. Word has length 25 [2021-04-15 03:57:40,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:57:40,564 INFO L480 AbstractCegarLoop]: Abstraction has 48821 states and 177734 transitions. [2021-04-15 03:57:40,565 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 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) [2021-04-15 03:57:40,565 INFO L276 IsEmpty]: Start isEmpty. Operand 48821 states and 177734 transitions. [2021-04-15 03:57:40,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 03:57:40,671 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:57:40,671 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:57:40,872 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:57:40,872 INFO L428 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:57:40,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:57:40,872 INFO L82 PathProgramCache]: Analyzing trace with hash -735311471, now seen corresponding path program 53 times [2021-04-15 03:57:40,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:57:40,872 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214235680] [2021-04-15 03:57:40,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:57:40,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:57:40,949 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:57:40,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214235680] [2021-04-15 03:57:40,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382723334] [2021-04-15 03:57:40,950 INFO L93 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 [2021-04-15 03:57:40,971 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-04-15 03:57:40,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:57:40,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2021-04-15 03:57:40,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:57:41,111 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:57:41,112 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:57:41,112 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-04-15 03:57:41,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762940227] [2021-04-15 03:57:41,112 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 03:57:41,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:57:41,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 03:57:41,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-04-15 03:57:41,113 INFO L87 Difference]: Start difference. First operand 48821 states and 177734 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 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) [2021-04-15 03:57:42,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:57:42,097 INFO L93 Difference]: Finished difference Result 49466 states and 179432 transitions. [2021-04-15 03:57:42,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-04-15 03:57:42,098 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 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 25 [2021-04-15 03:57:42,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:57:42,329 INFO L225 Difference]: With dead ends: 49466 [2021-04-15 03:57:42,329 INFO L226 Difference]: Without dead ends: 49403 [2021-04-15 03:57:42,329 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 176.2ms TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-04-15 03:57:42,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49403 states. [2021-04-15 03:57:43,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49403 to 48835. [2021-04-15 03:57:43,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48835 states, 48834 states have (on average 3.640312077650817) internal successors, (177771), 48834 states have internal predecessors, (177771), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:57:44,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48835 states to 48835 states and 177771 transitions. [2021-04-15 03:57:44,199 INFO L78 Accepts]: Start accepts. Automaton has 48835 states and 177771 transitions. Word has length 25 [2021-04-15 03:57:44,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:57:44,199 INFO L480 AbstractCegarLoop]: Abstraction has 48835 states and 177771 transitions. [2021-04-15 03:57:44,199 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 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) [2021-04-15 03:57:44,199 INFO L276 IsEmpty]: Start isEmpty. Operand 48835 states and 177771 transitions. [2021-04-15 03:57:44,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 03:57:44,335 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:57:44,335 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:57:44,535 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2021-04-15 03:57:44,536 INFO L428 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:57:44,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:57:44,536 INFO L82 PathProgramCache]: Analyzing trace with hash -1650392959, now seen corresponding path program 54 times [2021-04-15 03:57:44,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:57:44,536 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384417805] [2021-04-15 03:57:44,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:57:44,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:57:44,627 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:57:44,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384417805] [2021-04-15 03:57:44,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309337064] [2021-04-15 03:57:44,627 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-15 03:57:44,661 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-04-15 03:57:44,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:57:44,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2021-04-15 03:57:44,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:57:44,791 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:57:44,792 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:57:44,792 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-04-15 03:57:44,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452419113] [2021-04-15 03:57:44,792 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 03:57:44,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:57:44,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 03:57:44,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-04-15 03:57:44,793 INFO L87 Difference]: Start difference. First operand 48835 states and 177771 transitions. Second operand has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 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) [2021-04-15 03:57:45,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:57:45,448 INFO L93 Difference]: Finished difference Result 50050 states and 181095 transitions. [2021-04-15 03:57:45,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-04-15 03:57:45,448 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 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 25 [2021-04-15 03:57:45,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:57:45,693 INFO L225 Difference]: With dead ends: 50050 [2021-04-15 03:57:45,694 INFO L226 Difference]: Without dead ends: 49977 [2021-04-15 03:57:45,694 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 221.1ms TimeCoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2021-04-15 03:57:45,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49977 states. [2021-04-15 03:57:47,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49977 to 48876. [2021-04-15 03:57:47,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48876 states, 48875 states have (on average 3.6402046035805626) internal successors, (177915), 48875 states have internal predecessors, (177915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:57:47,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48876 states to 48876 states and 177915 transitions. [2021-04-15 03:57:47,397 INFO L78 Accepts]: Start accepts. Automaton has 48876 states and 177915 transitions. Word has length 25 [2021-04-15 03:57:47,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:57:47,397 INFO L480 AbstractCegarLoop]: Abstraction has 48876 states and 177915 transitions. [2021-04-15 03:57:47,397 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 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) [2021-04-15 03:57:47,397 INFO L276 IsEmpty]: Start isEmpty. Operand 48876 states and 177915 transitions. [2021-04-15 03:57:47,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 03:57:47,502 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:57:47,502 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:57:47,702 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:57:47,703 INFO L428 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:57:47,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:57:47,703 INFO L82 PathProgramCache]: Analyzing trace with hash 697526461, now seen corresponding path program 55 times [2021-04-15 03:57:47,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:57:47,703 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287032298] [2021-04-15 03:57:47,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:57:47,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:57:47,784 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:57:47,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287032298] [2021-04-15 03:57:47,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726767110] [2021-04-15 03:57:47,785 INFO 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 [2021-04-15 03:57:47,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:57:47,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2021-04-15 03:57:47,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:57:47,950 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:57:47,950 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:57:47,950 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-04-15 03:57:47,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826792051] [2021-04-15 03:57:47,951 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 03:57:47,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:57:47,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 03:57:47,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-04-15 03:57:47,951 INFO L87 Difference]: Start difference. First operand 48876 states and 177915 transitions. Second operand has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 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) [2021-04-15 03:57:48,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:57:48,583 INFO L93 Difference]: Finished difference Result 49588 states and 179721 transitions. [2021-04-15 03:57:48,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 03:57:48,583 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 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 25 [2021-04-15 03:57:48,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:57:48,824 INFO L225 Difference]: With dead ends: 49588 [2021-04-15 03:57:48,825 INFO L226 Difference]: Without dead ends: 49563 [2021-04-15 03:57:48,825 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 237.4ms TimeCoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2021-04-15 03:57:48,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49563 states. [2021-04-15 03:57:50,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49563 to 48888. [2021-04-15 03:57:50,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48888 states, 48887 states have (on average 3.6404770184302575) internal successors, (177972), 48887 states have internal predecessors, (177972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:57:50,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48888 states to 48888 states and 177972 transitions. [2021-04-15 03:57:50,538 INFO L78 Accepts]: Start accepts. Automaton has 48888 states and 177972 transitions. Word has length 25 [2021-04-15 03:57:50,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:57:50,538 INFO L480 AbstractCegarLoop]: Abstraction has 48888 states and 177972 transitions. [2021-04-15 03:57:50,538 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 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) [2021-04-15 03:57:50,538 INFO L276 IsEmpty]: Start isEmpty. Operand 48888 states and 177972 transitions. [2021-04-15 03:57:50,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 03:57:50,644 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:57:50,644 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:57:50,846 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2021-04-15 03:57:50,846 INFO L428 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:57:50,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:57:50,847 INFO L82 PathProgramCache]: Analyzing trace with hash 982042531, now seen corresponding path program 56 times [2021-04-15 03:57:50,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:57:50,847 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024644203] [2021-04-15 03:57:50,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:57:50,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:57:50,945 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:57:50,946 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024644203] [2021-04-15 03:57:50,946 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130921966] [2021-04-15 03:57:50,946 INFO L93 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 [2021-04-15 03:57:50,966 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 03:57:50,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:57:50,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2021-04-15 03:57:50,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:57:51,070 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:57:51,071 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:57:51,071 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-04-15 03:57:51,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971152755] [2021-04-15 03:57:51,071 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 03:57:51,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:57:51,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 03:57:51,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-04-15 03:57:51,072 INFO L87 Difference]: Start difference. First operand 48888 states and 177972 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 12 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) [2021-04-15 03:57:52,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:57:52,024 INFO L93 Difference]: Finished difference Result 50065 states and 181714 transitions. [2021-04-15 03:57:52,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-04-15 03:57:52,025 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 12 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 25 [2021-04-15 03:57:52,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:57:52,262 INFO L225 Difference]: With dead ends: 50065 [2021-04-15 03:57:52,263 INFO L226 Difference]: Without dead ends: 49947 [2021-04-15 03:57:52,263 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 157.6ms TimeCoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2021-04-15 03:57:52,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49947 states. [2021-04-15 03:57:53,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49947 to 49035. [2021-04-15 03:57:53,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49035 states, 49034 states have (on average 3.640331198760044) internal successors, (178500), 49034 states have internal predecessors, (178500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:57:53,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49035 states to 49035 states and 178500 transitions. [2021-04-15 03:57:53,632 INFO L78 Accepts]: Start accepts. Automaton has 49035 states and 178500 transitions. Word has length 25 [2021-04-15 03:57:53,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:57:53,632 INFO L480 AbstractCegarLoop]: Abstraction has 49035 states and 178500 transitions. [2021-04-15 03:57:53,632 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 12 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) [2021-04-15 03:57:53,632 INFO L276 IsEmpty]: Start isEmpty. Operand 49035 states and 178500 transitions. [2021-04-15 03:57:54,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 03:57:54,230 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:57:54,230 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:57:54,453 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:57:54,454 INFO L428 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:57:54,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:57:54,454 INFO L82 PathProgramCache]: Analyzing trace with hash 1430300891, now seen corresponding path program 57 times [2021-04-15 03:57:54,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:57:54,455 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381313484] [2021-04-15 03:57:54,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:57:54,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:57:54,572 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:57:54,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381313484] [2021-04-15 03:57:54,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050613219] [2021-04-15 03:57:54,572 INFO L93 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 [2021-04-15 03:57:54,601 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-04-15 03:57:54,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:57:54,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2021-04-15 03:57:54,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:57:54,826 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:57:54,826 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:57:54,827 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-04-15 03:57:54,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402144578] [2021-04-15 03:57:54,827 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 03:57:54,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:57:54,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 03:57:54,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-04-15 03:57:54,828 INFO L87 Difference]: Start difference. First operand 49035 states and 178500 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 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) [2021-04-15 03:57:55,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:57:55,689 INFO L93 Difference]: Finished difference Result 49758 states and 180665 transitions. [2021-04-15 03:57:55,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-04-15 03:57:55,690 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 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 25 [2021-04-15 03:57:55,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:57:55,926 INFO L225 Difference]: With dead ends: 49758 [2021-04-15 03:57:55,926 INFO L226 Difference]: Without dead ends: 49695 [2021-04-15 03:57:55,926 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 227.0ms TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-04-15 03:57:55,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49695 states. [2021-04-15 03:57:57,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49695 to 49053. [2021-04-15 03:57:57,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49053 states, 49052 states have (on average 3.640218543586398) internal successors, (178560), 49052 states have internal predecessors, (178560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:57:57,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49053 states to 49053 states and 178560 transitions. [2021-04-15 03:57:57,688 INFO L78 Accepts]: Start accepts. Automaton has 49053 states and 178560 transitions. Word has length 25 [2021-04-15 03:57:57,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:57:57,688 INFO L480 AbstractCegarLoop]: Abstraction has 49053 states and 178560 transitions. [2021-04-15 03:57:57,688 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 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) [2021-04-15 03:57:57,688 INFO L276 IsEmpty]: Start isEmpty. Operand 49053 states and 178560 transitions. [2021-04-15 03:57:57,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 03:57:57,798 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:57:57,798 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:57:57,998 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable149 [2021-04-15 03:57:57,999 INFO L428 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:57:57,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:57:57,999 INFO L82 PathProgramCache]: Analyzing trace with hash 515219403, now seen corresponding path program 58 times [2021-04-15 03:57:57,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:57:58,000 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499022932] [2021-04-15 03:57:58,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:57:58,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:57:58,076 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:57:58,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499022932] [2021-04-15 03:57:58,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680722699] [2021-04-15 03:57:58,077 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-15 03:57:58,097 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 03:57:58,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:57:58,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2021-04-15 03:57:58,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:57:58,247 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:57:58,248 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:57:58,248 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-04-15 03:57:58,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323802250] [2021-04-15 03:57:58,248 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 03:57:58,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:57:58,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 03:57:58,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-04-15 03:57:58,249 INFO L87 Difference]: Start difference. First operand 49053 states and 178560 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 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) [2021-04-15 03:57:58,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:57:58,995 INFO L93 Difference]: Finished difference Result 50900 states and 184438 transitions. [2021-04-15 03:57:58,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-04-15 03:57:58,996 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 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 25 [2021-04-15 03:57:58,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:57:59,238 INFO L225 Difference]: With dead ends: 50900 [2021-04-15 03:57:59,238 INFO L226 Difference]: Without dead ends: 50875 [2021-04-15 03:57:59,238 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 220.8ms TimeCoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2021-04-15 03:57:59,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50875 states. [2021-04-15 03:58:00,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50875 to 49168. [2021-04-15 03:58:00,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49168 states, 49167 states have (on average 3.642280391319381) internal successors, (179080), 49167 states have internal predecessors, (179080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:58:01,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49168 states to 49168 states and 179080 transitions. [2021-04-15 03:58:01,109 INFO L78 Accepts]: Start accepts. Automaton has 49168 states and 179080 transitions. Word has length 25 [2021-04-15 03:58:01,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:58:01,109 INFO L480 AbstractCegarLoop]: Abstraction has 49168 states and 179080 transitions. [2021-04-15 03:58:01,109 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 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) [2021-04-15 03:58:01,109 INFO L276 IsEmpty]: Start isEmpty. Operand 49168 states and 179080 transitions. [2021-04-15 03:58:01,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 03:58:01,217 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:58:01,217 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:58:01,418 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,105 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:58:01,418 INFO L428 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:58:01,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:58:01,419 INFO L82 PathProgramCache]: Analyzing trace with hash -434468137, now seen corresponding path program 59 times [2021-04-15 03:58:01,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:58:01,419 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874956971] [2021-04-15 03:58:01,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:58:01,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:58:01,454 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:58:01,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874956971] [2021-04-15 03:58:01,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287070999] [2021-04-15 03:58:01,454 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 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 [2021-04-15 03:58:01,475 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-04-15 03:58:01,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:58:01,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 8 conjunts are in the unsatisfiable core [2021-04-15 03:58:01,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:58:01,560 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:58:01,560 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:58:01,560 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 11 [2021-04-15 03:58:01,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150249815] [2021-04-15 03:58:01,561 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 03:58:01,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:58:01,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 03:58:01,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-04-15 03:58:01,561 INFO L87 Difference]: Start difference. First operand 49168 states and 179080 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) [2021-04-15 03:58:02,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:58:02,939 INFO L93 Difference]: Finished difference Result 92519 states and 337531 transitions. [2021-04-15 03:58:02,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-04-15 03:58:02,940 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 25 [2021-04-15 03:58:02,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:58:03,407 INFO L225 Difference]: With dead ends: 92519 [2021-04-15 03:58:03,407 INFO L226 Difference]: Without dead ends: 92495 [2021-04-15 03:58:03,407 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 103.3ms TimeCoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-04-15 03:58:03,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92495 states. [2021-04-15 03:58:05,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92495 to 90624. [2021-04-15 03:58:05,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90624 states, 90623 states have (on average 3.6490736347284907) internal successors, (330690), 90623 states have internal predecessors, (330690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:58:06,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90624 states to 90624 states and 330690 transitions. [2021-04-15 03:58:06,423 INFO L78 Accepts]: Start accepts. Automaton has 90624 states and 330690 transitions. Word has length 25 [2021-04-15 03:58:06,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:58:06,423 INFO L480 AbstractCegarLoop]: Abstraction has 90624 states and 330690 transitions. [2021-04-15 03:58:06,423 INFO L481 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) [2021-04-15 03:58:06,423 INFO L276 IsEmpty]: Start isEmpty. Operand 90624 states and 330690 transitions. [2021-04-15 03:58:06,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 03:58:06,628 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:58:06,629 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:58:06,829 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2021-04-15 03:58:06,829 INFO L428 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:58:06,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:58:06,830 INFO L82 PathProgramCache]: Analyzing trace with hash 1866838691, now seen corresponding path program 60 times [2021-04-15 03:58:06,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:58:06,830 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914002261] [2021-04-15 03:58:06,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:58:06,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:58:06,888 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:58:06,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914002261] [2021-04-15 03:58:06,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508679637] [2021-04-15 03:58:06,889 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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) [2021-04-15 03:58:06,926 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-04-15 03:58:06,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:58:06,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 8 conjunts are in the unsatisfiable core [2021-04-15 03:58:06,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:58:07,027 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:58:07,027 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:58:07,027 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 12 [2021-04-15 03:58:07,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263534193] [2021-04-15 03:58:07,028 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 03:58:07,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:58:07,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 03:58:07,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-04-15 03:58:07,029 INFO L87 Difference]: Start difference. First operand 90624 states and 330690 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) [2021-04-15 03:58:08,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:58:08,992 INFO L93 Difference]: Finished difference Result 137171 states and 502327 transitions. [2021-04-15 03:58:08,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-04-15 03:58:08,993 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 25 [2021-04-15 03:58:08,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:58:09,738 INFO L225 Difference]: With dead ends: 137171 [2021-04-15 03:58:09,739 INFO L226 Difference]: Without dead ends: 137155 [2021-04-15 03:58:09,739 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 177.7ms TimeCoverageRelationStatistics Valid=119, Invalid=261, Unknown=0, NotChecked=0, Total=380 [2021-04-15 03:58:09,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137155 states. [2021-04-15 03:58:13,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137155 to 75753. [2021-04-15 03:58:13,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75753 states, 75752 states have (on average 3.641699229063259) internal successors, (275866), 75752 states have internal predecessors, (275866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:58:13,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75753 states to 75753 states and 275866 transitions. [2021-04-15 03:58:13,676 INFO L78 Accepts]: Start accepts. Automaton has 75753 states and 275866 transitions. Word has length 25 [2021-04-15 03:58:13,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:58:13,676 INFO L480 AbstractCegarLoop]: Abstraction has 75753 states and 275866 transitions. [2021-04-15 03:58:13,676 INFO L481 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) [2021-04-15 03:58:13,676 INFO L276 IsEmpty]: Start isEmpty. Operand 75753 states and 275866 transitions. [2021-04-15 03:58:13,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 03:58:13,839 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:58:13,839 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:58:14,039 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:58:14,040 INFO L428 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:58:14,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:58:14,040 INFO L82 PathProgramCache]: Analyzing trace with hash 2025324127, now seen corresponding path program 61 times [2021-04-15 03:58:14,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:58:14,040 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119164631] [2021-04-15 03:58:14,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:58:14,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:58:14,149 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:58:14,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119164631] [2021-04-15 03:58:14,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788440297] [2021-04-15 03:58:14,150 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 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 [2021-04-15 03:58:14,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:58:14,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2021-04-15 03:58:14,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:58:14,282 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:58:14,282 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:58:14,282 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-04-15 03:58:14,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755726767] [2021-04-15 03:58:14,283 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 03:58:14,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:58:14,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 03:58:14,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-04-15 03:58:14,283 INFO L87 Difference]: Start difference. First operand 75753 states and 275866 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 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) [2021-04-15 03:58:15,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:58:15,081 INFO L93 Difference]: Finished difference Result 76022 states and 276650 transitions. [2021-04-15 03:58:15,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-04-15 03:58:15,082 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 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 25 [2021-04-15 03:58:15,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:58:15,435 INFO L225 Difference]: With dead ends: 76022 [2021-04-15 03:58:15,435 INFO L226 Difference]: Without dead ends: 75973 [2021-04-15 03:58:15,435 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 178.3ms TimeCoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-04-15 03:58:15,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75973 states. [2021-04-15 03:58:18,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75973 to 75785. [2021-04-15 03:58:18,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75785 states, 75784 states have (on average 3.6417317639607303) internal successors, (275985), 75784 states have internal predecessors, (275985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:58:18,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75785 states to 75785 states and 275985 transitions. [2021-04-15 03:58:18,580 INFO L78 Accepts]: Start accepts. Automaton has 75785 states and 275985 transitions. Word has length 25 [2021-04-15 03:58:18,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:58:18,580 INFO L480 AbstractCegarLoop]: Abstraction has 75785 states and 275985 transitions. [2021-04-15 03:58:18,580 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 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) [2021-04-15 03:58:18,580 INFO L276 IsEmpty]: Start isEmpty. Operand 75785 states and 275985 transitions. [2021-04-15 03:58:18,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 03:58:18,740 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:58:18,740 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:58:18,940 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable161 [2021-04-15 03:58:18,940 INFO L428 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:58:18,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:58:18,941 INFO L82 PathProgramCache]: Analyzing trace with hash 1144885067, now seen corresponding path program 62 times [2021-04-15 03:58:18,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:58:18,941 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453275702] [2021-04-15 03:58:18,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:58:18,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:58:19,012 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:58:19,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453275702] [2021-04-15 03:58:19,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867944311] [2021-04-15 03:58:19,012 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-15 03:58:19,031 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 03:58:19,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:58:19,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2021-04-15 03:58:19,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:58:19,125 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:58:19,125 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:58:19,125 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-04-15 03:58:19,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644683772] [2021-04-15 03:58:19,126 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 03:58:19,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:58:19,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 03:58:19,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-04-15 03:58:19,126 INFO L87 Difference]: Start difference. First operand 75785 states and 275985 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 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) [2021-04-15 03:58:19,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:58:19,808 INFO L93 Difference]: Finished difference Result 76818 states and 279184 transitions. [2021-04-15 03:58:19,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-04-15 03:58:19,809 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 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 25 [2021-04-15 03:58:19,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:58:20,151 INFO L225 Difference]: With dead ends: 76818 [2021-04-15 03:58:20,151 INFO L226 Difference]: Without dead ends: 76793 [2021-04-15 03:58:20,151 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 146.2ms TimeCoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-04-15 03:58:20,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76793 states. [2021-04-15 03:58:22,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76793 to 75828. [2021-04-15 03:58:22,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75828 states, 75827 states have (on average 3.6418821791710076) internal successors, (276153), 75827 states have internal predecessors, (276153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:58:23,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75828 states to 75828 states and 276153 transitions. [2021-04-15 03:58:23,228 INFO L78 Accepts]: Start accepts. Automaton has 75828 states and 276153 transitions. Word has length 25 [2021-04-15 03:58:23,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:58:23,228 INFO L480 AbstractCegarLoop]: Abstraction has 75828 states and 276153 transitions. [2021-04-15 03:58:23,228 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 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) [2021-04-15 03:58:23,228 INFO L276 IsEmpty]: Start isEmpty. Operand 75828 states and 276153 transitions. [2021-04-15 03:58:23,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 03:58:23,389 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:58:23,390 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:58:23,590 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:58:23,590 INFO L428 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:58:23,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:58:23,591 INFO L82 PathProgramCache]: Analyzing trace with hash -1821384809, now seen corresponding path program 63 times [2021-04-15 03:58:23,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:58:23,591 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050984918] [2021-04-15 03:58:23,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:58:23,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:58:23,673 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:58:23,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050984918] [2021-04-15 03:58:23,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762683360] [2021-04-15 03:58:23,673 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 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 [2021-04-15 03:58:23,698 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-04-15 03:58:23,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:58:23,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2021-04-15 03:58:23,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:58:23,820 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:58:23,820 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:58:23,821 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-04-15 03:58:23,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538720320] [2021-04-15 03:58:23,821 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 03:58:23,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:58:23,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 03:58:23,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-04-15 03:58:23,821 INFO L87 Difference]: Start difference. First operand 75828 states and 276153 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 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) [2021-04-15 03:58:24,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:58:24,530 INFO L93 Difference]: Finished difference Result 76411 states and 277746 transitions. [2021-04-15 03:58:24,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-04-15 03:58:24,531 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 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 25 [2021-04-15 03:58:24,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:58:24,831 INFO L225 Difference]: With dead ends: 76411 [2021-04-15 03:58:24,831 INFO L226 Difference]: Without dead ends: 76386 [2021-04-15 03:58:24,832 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 184.0ms TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-04-15 03:58:24,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76386 states. [2021-04-15 03:58:26,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76386 to 75829. [2021-04-15 03:58:26,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75829 states, 75828 states have (on average 3.641966028380018) internal successors, (276163), 75828 states have internal predecessors, (276163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:58:27,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75829 states to 75829 states and 276163 transitions. [2021-04-15 03:58:27,672 INFO L78 Accepts]: Start accepts. Automaton has 75829 states and 276163 transitions. Word has length 25 [2021-04-15 03:58:27,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:58:27,673 INFO L480 AbstractCegarLoop]: Abstraction has 75829 states and 276163 transitions. [2021-04-15 03:58:27,673 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 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) [2021-04-15 03:58:27,673 INFO L276 IsEmpty]: Start isEmpty. Operand 75829 states and 276163 transitions. [2021-04-15 03:58:27,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 03:58:27,821 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:58:27,821 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:58:28,023 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,110 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:58:28,023 INFO L428 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:58:28,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:58:28,023 INFO L82 PathProgramCache]: Analyzing trace with hash -484157037, now seen corresponding path program 64 times [2021-04-15 03:58:28,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:58:28,023 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639737885] [2021-04-15 03:58:28,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:58:28,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:58:28,066 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:58:28,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639737885] [2021-04-15 03:58:28,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2016911686] [2021-04-15 03:58:28,067 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 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 [2021-04-15 03:58:28,086 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 03:58:28,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:58:28,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 8 conjunts are in the unsatisfiable core [2021-04-15 03:58:28,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:58:28,162 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:58:28,163 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:58:28,163 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 10 [2021-04-15 03:58:28,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117013574] [2021-04-15 03:58:28,163 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 03:58:28,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:58:28,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 03:58:28,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-04-15 03:58:28,164 INFO L87 Difference]: Start difference. First operand 75829 states and 276163 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 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) [2021-04-15 03:58:28,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:58:28,779 INFO L93 Difference]: Finished difference Result 81206 states and 294898 transitions. [2021-04-15 03:58:28,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-04-15 03:58:28,783 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 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 25 [2021-04-15 03:58:28,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:58:29,113 INFO L225 Difference]: With dead ends: 81206 [2021-04-15 03:58:29,113 INFO L226 Difference]: Without dead ends: 81196 [2021-04-15 03:58:29,113 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 94.9ms TimeCoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-04-15 03:58:29,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81196 states. [2021-04-15 03:58:31,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81196 to 77254. [2021-04-15 03:58:31,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77254 states, 77253 states have (on average 3.640311703105381) internal successors, (281225), 77253 states have internal predecessors, (281225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:58:32,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77254 states to 77254 states and 281225 transitions. [2021-04-15 03:58:32,112 INFO L78 Accepts]: Start accepts. Automaton has 77254 states and 281225 transitions. Word has length 25 [2021-04-15 03:58:32,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:58:32,112 INFO L480 AbstractCegarLoop]: Abstraction has 77254 states and 281225 transitions. [2021-04-15 03:58:32,112 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 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) [2021-04-15 03:58:32,112 INFO L276 IsEmpty]: Start isEmpty. Operand 77254 states and 281225 transitions. [2021-04-15 03:58:32,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 03:58:32,265 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:58:32,265 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:58:32,466 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2021-04-15 03:58:32,466 INFO L428 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:58:32,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:58:32,466 INFO L82 PathProgramCache]: Analyzing trace with hash 697625119, now seen corresponding path program 65 times [2021-04-15 03:58:32,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:58:32,466 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259060606] [2021-04-15 03:58:32,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:58:32,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:58:32,571 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:58:32,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259060606] [2021-04-15 03:58:32,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542441749] [2021-04-15 03:58:32,571 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 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 [2021-04-15 03:58:32,601 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-04-15 03:58:32,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:58:32,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2021-04-15 03:58:32,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:58:32,700 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:58:32,701 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:58:32,701 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-04-15 03:58:32,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290495547] [2021-04-15 03:58:32,701 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 03:58:32,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:58:32,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 03:58:32,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-04-15 03:58:32,702 INFO L87 Difference]: Start difference. First operand 77254 states and 281225 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 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) [2021-04-15 03:58:33,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:58:33,492 INFO L93 Difference]: Finished difference Result 77680 states and 282481 transitions. [2021-04-15 03:58:33,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-04-15 03:58:33,497 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 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 25 [2021-04-15 03:58:33,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:58:33,816 INFO L225 Difference]: With dead ends: 77680 [2021-04-15 03:58:33,817 INFO L226 Difference]: Without dead ends: 77600 [2021-04-15 03:58:33,817 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 186.0ms TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-04-15 03:58:33,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77600 states. [2021-04-15 03:58:35,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77600 to 77302. [2021-04-15 03:58:35,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77302 states, 77301 states have (on average 3.6403280682009287) internal successors, (281401), 77301 states have internal predecessors, (281401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:58:36,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77302 states to 77302 states and 281401 transitions. [2021-04-15 03:58:36,765 INFO L78 Accepts]: Start accepts. Automaton has 77302 states and 281401 transitions. Word has length 25 [2021-04-15 03:58:36,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:58:36,765 INFO L480 AbstractCegarLoop]: Abstraction has 77302 states and 281401 transitions. [2021-04-15 03:58:36,765 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 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) [2021-04-15 03:58:36,765 INFO L276 IsEmpty]: Start isEmpty. Operand 77302 states and 281401 transitions. [2021-04-15 03:58:36,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 03:58:36,928 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:58:36,928 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:58:37,129 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2021-04-15 03:58:37,129 INFO L428 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:58:37,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:58:37,130 INFO L82 PathProgramCache]: Analyzing trace with hash -182813941, now seen corresponding path program 66 times [2021-04-15 03:58:37,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:58:37,130 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284532619] [2021-04-15 03:58:37,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:58:37,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:58:37,205 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:58:37,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284532619] [2021-04-15 03:58:37,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204768314] [2021-04-15 03:58:37,205 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 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 [2021-04-15 03:58:37,225 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-04-15 03:58:37,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:58:37,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2021-04-15 03:58:37,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:58:37,307 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:58:37,307 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:58:37,307 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-04-15 03:58:37,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858020978] [2021-04-15 03:58:37,307 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 03:58:37,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:58:37,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 03:58:37,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-04-15 03:58:37,308 INFO L87 Difference]: Start difference. First operand 77302 states and 281401 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 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) [2021-04-15 03:58:37,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:58:37,973 INFO L93 Difference]: Finished difference Result 78459 states and 284976 transitions. [2021-04-15 03:58:37,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-04-15 03:58:37,974 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 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 25 [2021-04-15 03:58:37,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:58:38,276 INFO L225 Difference]: With dead ends: 78459 [2021-04-15 03:58:38,276 INFO L226 Difference]: Without dead ends: 78434 [2021-04-15 03:58:38,276 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 137.8ms TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-04-15 03:58:38,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78434 states. [2021-04-15 03:58:40,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78434 to 77307. [2021-04-15 03:58:40,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77307 states, 77306 states have (on average 3.640351331073914) internal successors, (281421), 77306 states have internal predecessors, (281421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:58:41,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77307 states to 77307 states and 281421 transitions. [2021-04-15 03:58:41,191 INFO L78 Accepts]: Start accepts. Automaton has 77307 states and 281421 transitions. Word has length 25 [2021-04-15 03:58:41,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:58:41,191 INFO L480 AbstractCegarLoop]: Abstraction has 77307 states and 281421 transitions. [2021-04-15 03:58:41,191 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 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) [2021-04-15 03:58:41,191 INFO L276 IsEmpty]: Start isEmpty. Operand 77307 states and 281421 transitions. [2021-04-15 03:58:41,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 03:58:41,348 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:58:41,348 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:58:41,549 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:58:41,549 INFO L428 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:58:41,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:58:41,549 INFO L82 PathProgramCache]: Analyzing trace with hash -780291045, now seen corresponding path program 67 times [2021-04-15 03:58:41,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:58:41,549 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122375874] [2021-04-15 03:58:41,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:58:41,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:58:41,645 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:58:41,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122375874] [2021-04-15 03:58:41,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865035979] [2021-04-15 03:58:41,645 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2021-04-15 03:58:41,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:58:41,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2021-04-15 03:58:41,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:58:41,758 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:58:41,758 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:58:41,759 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-04-15 03:58:41,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480660090] [2021-04-15 03:58:41,759 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 03:58:41,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:58:41,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 03:58:41,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-04-15 03:58:41,759 INFO L87 Difference]: Start difference. First operand 77307 states and 281421 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 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) [2021-04-15 03:58:42,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:58:42,391 INFO L93 Difference]: Finished difference Result 77563 states and 282160 transitions. [2021-04-15 03:58:42,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-04-15 03:58:42,392 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 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 25 [2021-04-15 03:58:42,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:58:42,710 INFO L225 Difference]: With dead ends: 77563 [2021-04-15 03:58:42,710 INFO L226 Difference]: Without dead ends: 77530 [2021-04-15 03:58:42,710 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 133.8ms TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-04-15 03:58:42,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77530 states. [2021-04-15 03:58:44,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77530 to 77315. [2021-04-15 03:58:44,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77315 states, 77314 states have (on average 3.640336808340016) internal successors, (281449), 77314 states have internal predecessors, (281449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:58:45,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77315 states to 77315 states and 281449 transitions. [2021-04-15 03:58:45,794 INFO L78 Accepts]: Start accepts. Automaton has 77315 states and 281449 transitions. Word has length 25 [2021-04-15 03:58:45,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:58:45,794 INFO L480 AbstractCegarLoop]: Abstraction has 77315 states and 281449 transitions. [2021-04-15 03:58:45,794 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 11 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) [2021-04-15 03:58:45,794 INFO L276 IsEmpty]: Start isEmpty. Operand 77315 states and 281449 transitions. [2021-04-15 03:58:45,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 03:58:45,961 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:58:45,961 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:58:46,161 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:58:46,162 INFO L428 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:58:46,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:58:46,162 INFO L82 PathProgramCache]: Analyzing trace with hash -1817699061, now seen corresponding path program 68 times [2021-04-15 03:58:46,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:58:46,162 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923440295] [2021-04-15 03:58:46,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:58:46,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:58:46,250 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:58:46,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923440295] [2021-04-15 03:58:46,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776824786] [2021-04-15 03:58:46,251 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2021-04-15 03:58:46,270 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 03:58:46,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:58:46,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2021-04-15 03:58:46,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:58:46,391 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:58:46,392 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:58:46,392 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-04-15 03:58:46,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131397147] [2021-04-15 03:58:46,392 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 03:58:46,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:58:46,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 03:58:46,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-04-15 03:58:46,392 INFO L87 Difference]: Start difference. First operand 77315 states and 281449 transitions. Second operand has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 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) [2021-04-15 03:58:47,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:58:47,114 INFO L93 Difference]: Finished difference Result 77659 states and 282390 transitions. [2021-04-15 03:58:47,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-04-15 03:58:47,115 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 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 25 [2021-04-15 03:58:47,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:58:47,447 INFO L225 Difference]: With dead ends: 77659 [2021-04-15 03:58:47,448 INFO L226 Difference]: Without dead ends: 77589 [2021-04-15 03:58:47,448 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 173.7ms TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-04-15 03:58:47,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77589 states. [2021-04-15 03:58:49,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77589 to 77279. [2021-04-15 03:58:49,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77279 states, 77278 states have (on average 3.63971634876679) internal successors, (281270), 77278 states have internal predecessors, (281270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:58:50,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77279 states to 77279 states and 281270 transitions. [2021-04-15 03:58:50,370 INFO L78 Accepts]: Start accepts. Automaton has 77279 states and 281270 transitions. Word has length 25 [2021-04-15 03:58:50,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:58:50,370 INFO L480 AbstractCegarLoop]: Abstraction has 77279 states and 281270 transitions. [2021-04-15 03:58:50,370 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 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) [2021-04-15 03:58:50,370 INFO L276 IsEmpty]: Start isEmpty. Operand 77279 states and 281270 transitions. [2021-04-15 03:58:50,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 03:58:50,539 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:58:50,539 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:58:50,739 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:58:50,739 INFO L428 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:58:50,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:58:50,740 INFO L82 PathProgramCache]: Analyzing trace with hash -376478069, now seen corresponding path program 69 times [2021-04-15 03:58:50,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:58:50,740 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902350154] [2021-04-15 03:58:50,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:58:50,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:58:50,891 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:58:50,891 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902350154] [2021-04-15 03:58:50,891 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871887225] [2021-04-15 03:58:50,892 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-04-15 03:58:50,920 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-04-15 03:58:50,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:58:50,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 20 conjunts are in the unsatisfiable core [2021-04-15 03:58:50,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:58:51,048 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:58:51,049 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:58:51,049 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-04-15 03:58:51,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583396563] [2021-04-15 03:58:51,049 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 03:58:51,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:58:51,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 03:58:51,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-04-15 03:58:51,049 INFO L87 Difference]: Start difference. First operand 77279 states and 281270 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 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) [2021-04-15 03:58:51,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:58:51,919 INFO L93 Difference]: Finished difference Result 78113 states and 283706 transitions. [2021-04-15 03:58:51,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-04-15 03:58:51,920 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 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 25 [2021-04-15 03:58:51,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:58:52,259 INFO L225 Difference]: With dead ends: 78113 [2021-04-15 03:58:52,259 INFO L226 Difference]: Without dead ends: 78039 [2021-04-15 03:58:52,259 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 259.2ms TimeCoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2021-04-15 03:58:52,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78039 states. [2021-04-15 03:58:54,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78039 to 77471. [2021-04-15 03:58:54,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77471 states, 77470 states have (on average 3.638763392280883) internal successors, (281895), 77470 states have internal predecessors, (281895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:58:55,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77471 states to 77471 states and 281895 transitions. [2021-04-15 03:58:55,243 INFO L78 Accepts]: Start accepts. Automaton has 77471 states and 281895 transitions. Word has length 25 [2021-04-15 03:58:55,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:58:55,243 INFO L480 AbstractCegarLoop]: Abstraction has 77471 states and 281895 transitions. [2021-04-15 03:58:55,243 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 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) [2021-04-15 03:58:55,243 INFO L276 IsEmpty]: Start isEmpty. Operand 77471 states and 281895 transitions. [2021-04-15 03:58:55,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 03:58:55,398 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:58:55,398 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:58:55,600 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:58:55,601 INFO L428 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:58:55,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:58:55,601 INFO L82 PathProgramCache]: Analyzing trace with hash -181794737, now seen corresponding path program 70 times [2021-04-15 03:58:55,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:58:55,602 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555971862] [2021-04-15 03:58:55,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:58:55,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:58:55,706 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:58:55,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555971862] [2021-04-15 03:58:55,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134978931] [2021-04-15 03:58:55,707 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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 [2021-04-15 03:58:55,725 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 03:58:55,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:58:55,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-04-15 03:58:55,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:58:55,855 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:58:55,856 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:58:55,856 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-04-15 03:58:55,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949757442] [2021-04-15 03:58:55,856 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 03:58:55,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:58:55,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 03:58:55,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-04-15 03:58:55,856 INFO L87 Difference]: Start difference. First operand 77471 states and 281895 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 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) [2021-04-15 03:58:56,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:58:56,704 INFO L93 Difference]: Finished difference Result 77694 states and 282349 transitions. [2021-04-15 03:58:56,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-04-15 03:58:56,705 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 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 25 [2021-04-15 03:58:56,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:58:57,015 INFO L225 Difference]: With dead ends: 77694 [2021-04-15 03:58:57,015 INFO L226 Difference]: Without dead ends: 77515 [2021-04-15 03:58:57,016 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 235.1ms TimeCoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2021-04-15 03:58:57,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77515 states. [2021-04-15 03:58:58,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77515 to 77439. [2021-04-15 03:58:59,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77439 states, 77438 states have (on average 3.6384075001937033) internal successors, (281751), 77438 states have internal predecessors, (281751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:58:59,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77439 states to 77439 states and 281751 transitions. [2021-04-15 03:58:59,894 INFO L78 Accepts]: Start accepts. Automaton has 77439 states and 281751 transitions. Word has length 25 [2021-04-15 03:58:59,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:58:59,894 INFO L480 AbstractCegarLoop]: Abstraction has 77439 states and 281751 transitions. [2021-04-15 03:58:59,894 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 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) [2021-04-15 03:58:59,894 INFO L276 IsEmpty]: Start isEmpty. Operand 77439 states and 281751 transitions. [2021-04-15 03:59:00,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 03:59:00,044 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:59:00,044 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:59:00,244 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:59:00,244 INFO L428 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:59:00,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:59:00,245 INFO L82 PathProgramCache]: Analyzing trace with hash 1465003531, now seen corresponding path program 71 times [2021-04-15 03:59:00,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:59:00,245 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560010295] [2021-04-15 03:59:00,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:59:00,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:59:00,341 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:59:00,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560010295] [2021-04-15 03:59:00,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011990314] [2021-04-15 03:59:00,342 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 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 [2021-04-15 03:59:00,372 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-04-15 03:59:00,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:59:00,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2021-04-15 03:59:00,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:59:00,525 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:59:00,526 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:59:00,526 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-04-15 03:59:00,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674535593] [2021-04-15 03:59:00,526 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 03:59:00,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:59:00,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 03:59:00,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-04-15 03:59:00,527 INFO L87 Difference]: Start difference. First operand 77439 states and 281751 transitions. Second operand has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 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) [2021-04-15 03:59:01,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:59:01,692 INFO L93 Difference]: Finished difference Result 79339 states and 287695 transitions. [2021-04-15 03:59:01,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-04-15 03:59:01,692 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 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 25 [2021-04-15 03:59:01,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:59:02,029 INFO L225 Difference]: With dead ends: 79339 [2021-04-15 03:59:02,029 INFO L226 Difference]: Without dead ends: 79274 [2021-04-15 03:59:02,029 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 385.3ms TimeCoverageRelationStatistics Valid=115, Invalid=535, Unknown=0, NotChecked=0, Total=650 [2021-04-15 03:59:02,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79274 states. [2021-04-15 03:59:04,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79274 to 77568. [2021-04-15 03:59:04,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77568 states, 77567 states have (on average 3.638802583572911) internal successors, (282251), 77567 states have internal predecessors, (282251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:59:05,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77568 states to 77568 states and 282251 transitions. [2021-04-15 03:59:05,135 INFO L78 Accepts]: Start accepts. Automaton has 77568 states and 282251 transitions. Word has length 25 [2021-04-15 03:59:05,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:59:05,135 INFO L480 AbstractCegarLoop]: Abstraction has 77568 states and 282251 transitions. [2021-04-15 03:59:05,136 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 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) [2021-04-15 03:59:05,136 INFO L276 IsEmpty]: Start isEmpty. Operand 77568 states and 282251 transitions. [2021-04-15 03:59:05,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 03:59:05,292 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:59:05,292 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:59:05,492 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:59:05,493 INFO L428 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:59:05,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:59:05,493 INFO L82 PathProgramCache]: Analyzing trace with hash 53335819, now seen corresponding path program 72 times [2021-04-15 03:59:05,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:59:05,493 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352719758] [2021-04-15 03:59:05,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:59:05,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:59:05,613 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:59:05,614 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352719758] [2021-04-15 03:59:05,614 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107568326] [2021-04-15 03:59:05,614 INFO L93 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 [2021-04-15 03:59:05,635 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-04-15 03:59:05,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:59:05,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 20 conjunts are in the unsatisfiable core [2021-04-15 03:59:05,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:59:05,783 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:59:05,783 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:59:05,783 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-04-15 03:59:05,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387489694] [2021-04-15 03:59:05,784 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 03:59:05,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:59:05,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 03:59:05,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2021-04-15 03:59:05,784 INFO L87 Difference]: Start difference. First operand 77568 states and 282251 transitions. Second operand has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 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) [2021-04-15 03:59:06,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:59:06,700 INFO L93 Difference]: Finished difference Result 94772 states and 343263 transitions. [2021-04-15 03:59:06,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-04-15 03:59:06,701 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 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 25 [2021-04-15 03:59:06,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:59:07,117 INFO L225 Difference]: With dead ends: 94772 [2021-04-15 03:59:07,117 INFO L226 Difference]: Without dead ends: 94731 [2021-04-15 03:59:07,117 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 293.0ms TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2021-04-15 03:59:07,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94731 states. [2021-04-15 03:59:09,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94731 to 77763. [2021-04-15 03:59:09,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77763 states, 77762 states have (on average 3.638486664437643) internal successors, (282936), 77762 states have internal predecessors, (282936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:59:09,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77763 states to 77763 states and 282936 transitions. [2021-04-15 03:59:09,998 INFO L78 Accepts]: Start accepts. Automaton has 77763 states and 282936 transitions. Word has length 25 [2021-04-15 03:59:09,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:59:09,998 INFO L480 AbstractCegarLoop]: Abstraction has 77763 states and 282936 transitions. [2021-04-15 03:59:09,998 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 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) [2021-04-15 03:59:09,998 INFO L276 IsEmpty]: Start isEmpty. Operand 77763 states and 282936 transitions. [2021-04-15 03:59:10,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 03:59:10,106 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:59:10,106 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:59:10,308 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable177 [2021-04-15 03:59:10,309 INFO L428 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:59:10,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:59:10,309 INFO L82 PathProgramCache]: Analyzing trace with hash 1031893263, now seen corresponding path program 73 times [2021-04-15 03:59:10,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:59:10,309 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887009825] [2021-04-15 03:59:10,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:59:10,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:59:10,471 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:59:10,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887009825] [2021-04-15 03:59:10,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948460744] [2021-04-15 03:59:10,472 INFO 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 [2021-04-15 03:59:10,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:59:10,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 20 conjunts are in the unsatisfiable core [2021-04-15 03:59:10,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:59:10,648 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:59:10,648 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:59:10,648 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-04-15 03:59:10,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220108181] [2021-04-15 03:59:10,648 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 03:59:10,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:59:10,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 03:59:10,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2021-04-15 03:59:10,649 INFO L87 Difference]: Start difference. First operand 77763 states and 282936 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 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) [2021-04-15 03:59:12,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:59:12,238 INFO L93 Difference]: Finished difference Result 110889 states and 395238 transitions. [2021-04-15 03:59:12,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-04-15 03:59:12,239 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 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 25 [2021-04-15 03:59:12,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:59:12,723 INFO L225 Difference]: With dead ends: 110889 [2021-04-15 03:59:12,723 INFO L226 Difference]: Without dead ends: 110856 [2021-04-15 03:59:12,723 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 330.9ms TimeCoverageRelationStatistics Valid=111, Invalid=395, Unknown=0, NotChecked=0, Total=506 [2021-04-15 03:59:12,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110856 states. [2021-04-15 03:59:15,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110856 to 77776. [2021-04-15 03:59:15,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77776 states, 77775 states have (on average 3.6385342333654775) internal successors, (282987), 77775 states have internal predecessors, (282987), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:59:15,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77776 states to 77776 states and 282987 transitions. [2021-04-15 03:59:15,500 INFO L78 Accepts]: Start accepts. Automaton has 77776 states and 282987 transitions. Word has length 25 [2021-04-15 03:59:15,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:59:15,500 INFO L480 AbstractCegarLoop]: Abstraction has 77776 states and 282987 transitions. [2021-04-15 03:59:15,500 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 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) [2021-04-15 03:59:15,500 INFO L276 IsEmpty]: Start isEmpty. Operand 77776 states and 282987 transitions. [2021-04-15 03:59:15,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 03:59:15,660 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:59:15,660 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:59:15,861 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2021-04-15 03:59:15,861 INFO L428 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:59:15,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:59:15,861 INFO L82 PathProgramCache]: Analyzing trace with hash 232853259, now seen corresponding path program 74 times [2021-04-15 03:59:15,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:59:15,861 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506568888] [2021-04-15 03:59:15,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:59:15,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:59:16,004 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:59:16,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506568888] [2021-04-15 03:59:16,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934405447] [2021-04-15 03:59:16,004 INFO L93 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) [2021-04-15 03:59:16,030 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 03:59:16,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:59:16,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 20 conjunts are in the unsatisfiable core [2021-04-15 03:59:16,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:59:16,203 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:59:16,203 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:59:16,203 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-04-15 03:59:16,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701149488] [2021-04-15 03:59:16,203 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 03:59:16,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:59:16,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 03:59:16,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2021-04-15 03:59:16,204 INFO L87 Difference]: Start difference. First operand 77776 states and 282987 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 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) [2021-04-15 03:59:18,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:59:18,291 INFO L93 Difference]: Finished difference Result 97556 states and 346430 transitions. [2021-04-15 03:59:18,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-04-15 03:59:18,291 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 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 25 [2021-04-15 03:59:18,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:59:18,671 INFO L225 Difference]: With dead ends: 97556 [2021-04-15 03:59:18,671 INFO L226 Difference]: Without dead ends: 97363 [2021-04-15 03:59:18,672 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 385 ImplicationChecksByTransitivity, 1156.3ms TimeCoverageRelationStatistics Valid=321, Invalid=1161, Unknown=0, NotChecked=0, Total=1482 [2021-04-15 03:59:18,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97363 states. [2021-04-15 03:59:21,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97363 to 77797. [2021-04-15 03:59:21,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77797 states, 77796 states have (on average 3.6389274512828425) internal successors, (283094), 77796 states have internal predecessors, (283094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:59:21,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77797 states to 77797 states and 283094 transitions. [2021-04-15 03:59:21,649 INFO L78 Accepts]: Start accepts. Automaton has 77797 states and 283094 transitions. Word has length 25 [2021-04-15 03:59:21,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:59:21,649 INFO L480 AbstractCegarLoop]: Abstraction has 77797 states and 283094 transitions. [2021-04-15 03:59:21,649 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 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) [2021-04-15 03:59:21,649 INFO L276 IsEmpty]: Start isEmpty. Operand 77797 states and 283094 transitions. [2021-04-15 03:59:21,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 03:59:21,804 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:59:21,804 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:59:22,004 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:59:22,005 INFO L428 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:59:22,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:59:22,005 INFO L82 PathProgramCache]: Analyzing trace with hash -475048353, now seen corresponding path program 75 times [2021-04-15 03:59:22,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:59:22,005 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123775163] [2021-04-15 03:59:22,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:59:22,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:59:22,124 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:59:22,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123775163] [2021-04-15 03:59:22,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584072809] [2021-04-15 03:59:22,124 INFO L93 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 [2021-04-15 03:59:22,162 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-04-15 03:59:22,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:59:22,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-04-15 03:59:22,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:59:22,345 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:59:22,345 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:59:22,345 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-04-15 03:59:22,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313154192] [2021-04-15 03:59:22,345 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 03:59:22,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:59:22,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 03:59:22,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-04-15 03:59:22,346 INFO L87 Difference]: Start difference. First operand 77797 states and 283094 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 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) [2021-04-15 03:59:23,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:59:23,268 INFO L93 Difference]: Finished difference Result 94662 states and 342987 transitions. [2021-04-15 03:59:23,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 03:59:23,268 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 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 25 [2021-04-15 03:59:23,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:59:23,652 INFO L225 Difference]: With dead ends: 94662 [2021-04-15 03:59:23,652 INFO L226 Difference]: Without dead ends: 94602 [2021-04-15 03:59:23,652 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 346.8ms TimeCoverageRelationStatistics Valid=95, Invalid=367, Unknown=0, NotChecked=0, Total=462 [2021-04-15 03:59:24,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94602 states. [2021-04-15 03:59:26,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94602 to 77813. [2021-04-15 03:59:26,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77813 states, 77812 states have (on average 3.6390659538374543) internal successors, (283163), 77812 states have internal predecessors, (283163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:59:26,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77813 states to 77813 states and 283163 transitions. [2021-04-15 03:59:26,609 INFO L78 Accepts]: Start accepts. Automaton has 77813 states and 283163 transitions. Word has length 25 [2021-04-15 03:59:26,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:59:26,610 INFO L480 AbstractCegarLoop]: Abstraction has 77813 states and 283163 transitions. [2021-04-15 03:59:26,610 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 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) [2021-04-15 03:59:26,610 INFO L276 IsEmpty]: Start isEmpty. Operand 77813 states and 283163 transitions. [2021-04-15 03:59:26,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 03:59:26,773 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:59:26,773 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:59:26,973 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable183 [2021-04-15 03:59:26,974 INFO L428 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:59:26,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:59:26,974 INFO L82 PathProgramCache]: Analyzing trace with hash -1274088357, now seen corresponding path program 76 times [2021-04-15 03:59:26,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:59:26,974 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582520192] [2021-04-15 03:59:26,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:59:26,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:59:27,077 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:59:27,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582520192] [2021-04-15 03:59:27,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206946826] [2021-04-15 03:59:27,077 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-15 03:59:27,097 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 03:59:27,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:59:27,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-04-15 03:59:27,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:59:27,300 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:59:27,300 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:59:27,300 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-04-15 03:59:27,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436630022] [2021-04-15 03:59:27,301 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 03:59:27,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:59:27,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 03:59:27,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-04-15 03:59:27,301 INFO L87 Difference]: Start difference. First operand 77813 states and 283163 transitions. Second operand has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 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) [2021-04-15 03:59:29,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:59:29,432 INFO L93 Difference]: Finished difference Result 105811 states and 385139 transitions. [2021-04-15 03:59:29,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-04-15 03:59:29,433 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 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 25 [2021-04-15 03:59:29,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:59:30,210 INFO L225 Difference]: With dead ends: 105811 [2021-04-15 03:59:30,210 INFO L226 Difference]: Without dead ends: 105719 [2021-04-15 03:59:30,210 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 601.1ms TimeCoverageRelationStatistics Valid=194, Invalid=676, Unknown=0, NotChecked=0, Total=870 [2021-04-15 03:59:30,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105719 states. [2021-04-15 03:59:32,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105719 to 77799. [2021-04-15 03:59:32,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77799 states, 77798 states have (on average 3.638962441193861) internal successors, (283104), 77798 states have internal predecessors, (283104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:59:32,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77799 states to 77799 states and 283104 transitions. [2021-04-15 03:59:32,636 INFO L78 Accepts]: Start accepts. Automaton has 77799 states and 283104 transitions. Word has length 25 [2021-04-15 03:59:32,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:59:32,637 INFO L480 AbstractCegarLoop]: Abstraction has 77799 states and 283104 transitions. [2021-04-15 03:59:32,637 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 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) [2021-04-15 03:59:32,637 INFO L276 IsEmpty]: Start isEmpty. Operand 77799 states and 283104 transitions. [2021-04-15 03:59:32,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 03:59:32,790 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:59:32,790 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:59:33,012 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:59:33,013 INFO L428 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:59:33,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:59:33,014 INFO L82 PathProgramCache]: Analyzing trace with hash 1883882647, now seen corresponding path program 77 times [2021-04-15 03:59:33,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:59:33,014 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486854453] [2021-04-15 03:59:33,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:59:33,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:59:33,112 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:59:33,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486854453] [2021-04-15 03:59:33,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19244582] [2021-04-15 03:59:33,113 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 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 [2021-04-15 03:59:33,134 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-04-15 03:59:33,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:59:33,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 20 conjunts are in the unsatisfiable core [2021-04-15 03:59:33,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:59:33,292 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:59:33,292 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:59:33,292 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-04-15 03:59:33,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388134410] [2021-04-15 03:59:33,292 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 03:59:33,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:59:33,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 03:59:33,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2021-04-15 03:59:33,293 INFO L87 Difference]: Start difference. First operand 77799 states and 283104 transitions. Second operand has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 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) [2021-04-15 03:59:34,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:59:34,927 INFO L93 Difference]: Finished difference Result 94982 states and 344217 transitions. [2021-04-15 03:59:34,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-04-15 03:59:34,927 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 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 25 [2021-04-15 03:59:34,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:59:35,356 INFO L225 Difference]: With dead ends: 94982 [2021-04-15 03:59:35,357 INFO L226 Difference]: Without dead ends: 94949 [2021-04-15 03:59:35,357 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 355.1ms TimeCoverageRelationStatistics Valid=152, Invalid=448, Unknown=0, NotChecked=0, Total=600 [2021-04-15 03:59:35,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94949 states. [2021-04-15 03:59:37,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94949 to 77835. [2021-04-15 03:59:37,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77835 states, 77834 states have (on average 3.639579104247501) internal successors, (283283), 77834 states have internal predecessors, (283283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:59:38,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77835 states to 77835 states and 283283 transitions. [2021-04-15 03:59:38,078 INFO L78 Accepts]: Start accepts. Automaton has 77835 states and 283283 transitions. Word has length 25 [2021-04-15 03:59:38,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:59:38,078 INFO L480 AbstractCegarLoop]: Abstraction has 77835 states and 283283 transitions. [2021-04-15 03:59:38,078 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 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) [2021-04-15 03:59:38,078 INFO L276 IsEmpty]: Start isEmpty. Operand 77835 states and 283283 transitions. [2021-04-15 03:59:38,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 03:59:38,234 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:59:38,234 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:59:38,436 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,124 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:59:38,437 INFO L428 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:59:38,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:59:38,437 INFO L82 PathProgramCache]: Analyzing trace with hash -1432527205, now seen corresponding path program 78 times [2021-04-15 03:59:38,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:59:38,437 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807086867] [2021-04-15 03:59:38,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:59:38,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:59:38,552 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:59:38,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807086867] [2021-04-15 03:59:38,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786542095] [2021-04-15 03:59:38,552 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2021-04-15 03:59:38,571 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-04-15 03:59:38,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:59:38,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 20 conjunts are in the unsatisfiable core [2021-04-15 03:59:38,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:59:39,293 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:59:39,294 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:59:39,294 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-04-15 03:59:39,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129934119] [2021-04-15 03:59:39,294 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 03:59:39,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:59:39,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 03:59:39,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-04-15 03:59:39,295 INFO L87 Difference]: Start difference. First operand 77835 states and 283283 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 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) [2021-04-15 03:59:40,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:59:40,341 INFO L93 Difference]: Finished difference Result 95030 states and 344348 transitions. [2021-04-15 03:59:40,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-04-15 03:59:40,341 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 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 25 [2021-04-15 03:59:40,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:59:40,719 INFO L225 Difference]: With dead ends: 95030 [2021-04-15 03:59:40,720 INFO L226 Difference]: Without dead ends: 95001 [2021-04-15 03:59:40,720 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 944.3ms TimeCoverageRelationStatistics Valid=168, Invalid=482, Unknown=0, NotChecked=0, Total=650 [2021-04-15 03:59:40,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95001 states. [2021-04-15 03:59:42,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95001 to 77848. [2021-04-15 03:59:43,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77848 states, 77847 states have (on average 3.6396136010379334) internal successors, (283333), 77847 states have internal predecessors, (283333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:59:43,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77848 states to 77848 states and 283333 transitions. [2021-04-15 03:59:43,893 INFO L78 Accepts]: Start accepts. Automaton has 77848 states and 283333 transitions. Word has length 25 [2021-04-15 03:59:43,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:59:43,893 INFO L480 AbstractCegarLoop]: Abstraction has 77848 states and 283333 transitions. [2021-04-15 03:59:43,893 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 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) [2021-04-15 03:59:43,893 INFO L276 IsEmpty]: Start isEmpty. Operand 77848 states and 283333 transitions. [2021-04-15 03:59:44,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 03:59:44,056 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:59:44,056 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:59:44,256 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:59:44,257 INFO L428 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:59:44,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:59:44,257 INFO L82 PathProgramCache]: Analyzing trace with hash 2063400087, now seen corresponding path program 79 times [2021-04-15 03:59:44,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:59:44,257 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [909469205] [2021-04-15 03:59:44,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:59:44,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:59:44,376 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:59:44,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [909469205] [2021-04-15 03:59:44,377 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748517531] [2021-04-15 03:59:44,378 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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) [2021-04-15 03:59:44,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:59:44,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 20 conjunts are in the unsatisfiable core [2021-04-15 03:59:44,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:59:44,607 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:59:44,607 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:59:44,607 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-04-15 03:59:44,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431699367] [2021-04-15 03:59:44,608 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 03:59:44,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:59:44,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 03:59:44,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2021-04-15 03:59:44,608 INFO L87 Difference]: Start difference. First operand 77848 states and 283333 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 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) [2021-04-15 03:59:46,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:59:46,026 INFO L93 Difference]: Finished difference Result 88722 states and 324271 transitions. [2021-04-15 03:59:46,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-04-15 03:59:46,027 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 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 25 [2021-04-15 03:59:46,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:59:46,392 INFO L225 Difference]: With dead ends: 88722 [2021-04-15 03:59:46,393 INFO L226 Difference]: Without dead ends: 88697 [2021-04-15 03:59:46,393 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 723.4ms TimeCoverageRelationStatistics Valid=353, Invalid=1053, Unknown=0, NotChecked=0, Total=1406 [2021-04-15 03:59:46,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88697 states. [2021-04-15 03:59:48,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88697 to 77835. [2021-04-15 03:59:48,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77835 states, 77834 states have (on average 3.639591952103194) internal successors, (283284), 77834 states have internal predecessors, (283284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:59:49,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77835 states to 77835 states and 283284 transitions. [2021-04-15 03:59:49,204 INFO L78 Accepts]: Start accepts. Automaton has 77835 states and 283284 transitions. Word has length 25 [2021-04-15 03:59:49,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:59:49,204 INFO L480 AbstractCegarLoop]: Abstraction has 77835 states and 283284 transitions. [2021-04-15 03:59:49,205 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 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) [2021-04-15 03:59:49,205 INFO L276 IsEmpty]: Start isEmpty. Operand 77835 states and 283284 transitions. [2021-04-15 03:59:49,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 03:59:49,384 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:59:49,384 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:59:49,585 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2021-04-15 03:59:49,585 INFO L428 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:59:49,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:59:49,585 INFO L82 PathProgramCache]: Analyzing trace with hash 781968495, now seen corresponding path program 80 times [2021-04-15 03:59:49,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:59:49,586 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753055594] [2021-04-15 03:59:49,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:59:49,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:59:49,735 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:59:49,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753055594] [2021-04-15 03:59:49,743 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255885601] [2021-04-15 03:59:49,743 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-15 03:59:49,769 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 03:59:49,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:59:49,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 20 conjunts are in the unsatisfiable core [2021-04-15 03:59:49,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 03:59:49,962 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:59:49,962 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:59:49,962 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-04-15 03:59:49,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653116073] [2021-04-15 03:59:49,963 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 03:59:49,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:59:49,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 03:59:49,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-04-15 03:59:49,963 INFO L87 Difference]: Start difference. First operand 77835 states and 283284 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 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) [2021-04-15 03:59:51,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:59:51,610 INFO L93 Difference]: Finished difference Result 94397 states and 342391 transitions. [2021-04-15 03:59:51,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-04-15 03:59:51,610 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 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 25 [2021-04-15 03:59:51,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:59:52,038 INFO L225 Difference]: With dead ends: 94397 [2021-04-15 03:59:52,038 INFO L226 Difference]: Without dead ends: 94360 [2021-04-15 03:59:52,039 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 574.0ms TimeCoverageRelationStatistics Valid=195, Invalid=617, Unknown=0, NotChecked=0, Total=812 [2021-04-15 03:59:52,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94360 states. [2021-04-15 03:59:54,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94360 to 77898. [2021-04-15 03:59:54,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77898 states, 77897 states have (on average 3.6398449234245223) internal successors, (283533), 77897 states have internal predecessors, (283533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 03:59:54,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77898 states to 77898 states and 283533 transitions. [2021-04-15 03:59:54,508 INFO L78 Accepts]: Start accepts. Automaton has 77898 states and 283533 transitions. Word has length 25 [2021-04-15 03:59:54,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 03:59:54,508 INFO L480 AbstractCegarLoop]: Abstraction has 77898 states and 283533 transitions. [2021-04-15 03:59:54,508 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 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) [2021-04-15 03:59:54,509 INFO L276 IsEmpty]: Start isEmpty. Operand 77898 states and 283533 transitions. [2021-04-15 03:59:54,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 03:59:54,669 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 03:59:54,669 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 03:59:54,871 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable204,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:59:54,871 INFO L428 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 03:59:54,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 03:59:54,871 INFO L82 PathProgramCache]: Analyzing trace with hash -17071509, now seen corresponding path program 81 times [2021-04-15 03:59:54,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 03:59:54,872 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252225137] [2021-04-15 03:59:54,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 03:59:54,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 03:59:54,989 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:59:54,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252225137] [2021-04-15 03:59:54,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175102349] [2021-04-15 03:59:54,989 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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) [2021-04-15 03:59:55,019 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-04-15 03:59:55,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 03:59:55,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 20 conjunts are in the unsatisfiable core [2021-04-15 03:59:55,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 03:59:55,254 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 03:59:55,254 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 03:59:55,254 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-04-15 03:59:55,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138826041] [2021-04-15 03:59:55,255 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 03:59:55,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 03:59:55,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 03:59:55,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2021-04-15 03:59:55,255 INFO L87 Difference]: Start difference. First operand 77898 states and 283533 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 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) [2021-04-15 03:59:56,598 WARN L205 SmtUtils]: Spent 461.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2021-04-15 03:59:57,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 03:59:57,427 INFO L93 Difference]: Finished difference Result 106020 states and 385942 transitions. [2021-04-15 03:59:57,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-04-15 03:59:57,428 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 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 25 [2021-04-15 03:59:57,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 03:59:57,894 INFO L225 Difference]: With dead ends: 106020 [2021-04-15 03:59:57,895 INFO L226 Difference]: Without dead ends: 105968 [2021-04-15 03:59:57,895 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 431 ImplicationChecksByTransitivity, 1363.8ms TimeCoverageRelationStatistics Valid=363, Invalid=1119, Unknown=0, NotChecked=0, Total=1482 [2021-04-15 03:59:58,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105968 states. [2021-04-15 04:00:00,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105968 to 77888. [2021-04-15 04:00:00,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77888 states, 77887 states have (on average 3.639901395611591) internal successors, (283501), 77887 states have internal predecessors, (283501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:00:01,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77888 states to 77888 states and 283501 transitions. [2021-04-15 04:00:01,331 INFO L78 Accepts]: Start accepts. Automaton has 77888 states and 283501 transitions. Word has length 25 [2021-04-15 04:00:01,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:00:01,331 INFO L480 AbstractCegarLoop]: Abstraction has 77888 states and 283501 transitions. [2021-04-15 04:00:01,331 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 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) [2021-04-15 04:00:01,331 INFO L276 IsEmpty]: Start isEmpty. Operand 77888 states and 283501 transitions. [2021-04-15 04:00:01,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 04:00:01,513 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:00:01,513 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:00:01,714 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable208 [2021-04-15 04:00:01,714 INFO L428 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:00:01,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:00:01,714 INFO L82 PathProgramCache]: Analyzing trace with hash -98470565, now seen corresponding path program 82 times [2021-04-15 04:00:01,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:00:01,715 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786446142] [2021-04-15 04:00:01,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:00:01,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:00:01,811 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:00:01,811 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786446142] [2021-04-15 04:00:01,811 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146456335] [2021-04-15 04:00:01,811 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 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 [2021-04-15 04:00:01,839 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 04:00:01,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:00:01,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 20 conjunts are in the unsatisfiable core [2021-04-15 04:00:01,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:00:02,056 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:00:02,057 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:00:02,057 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-04-15 04:00:02,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318719427] [2021-04-15 04:00:02,057 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 04:00:02,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:00:02,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 04:00:02,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2021-04-15 04:00:02,058 INFO L87 Difference]: Start difference. First operand 77888 states and 283501 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 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) [2021-04-15 04:00:03,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:00:03,661 INFO L93 Difference]: Finished difference Result 96396 states and 348721 transitions. [2021-04-15 04:00:03,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-04-15 04:00:03,662 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 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 25 [2021-04-15 04:00:03,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:00:04,088 INFO L225 Difference]: With dead ends: 96396 [2021-04-15 04:00:04,088 INFO L226 Difference]: Without dead ends: 96342 [2021-04-15 04:00:04,089 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 723.9ms TimeCoverageRelationStatistics Valid=302, Invalid=1030, Unknown=0, NotChecked=0, Total=1332 [2021-04-15 04:00:04,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96342 states. [2021-04-15 04:00:06,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96342 to 77888. [2021-04-15 04:00:06,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77888 states, 77887 states have (on average 3.6401581778730727) internal successors, (283521), 77887 states have internal predecessors, (283521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:00:07,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77888 states to 77888 states and 283521 transitions. [2021-04-15 04:00:07,213 INFO L78 Accepts]: Start accepts. Automaton has 77888 states and 283521 transitions. Word has length 25 [2021-04-15 04:00:07,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:00:07,213 INFO L480 AbstractCegarLoop]: Abstraction has 77888 states and 283521 transitions. [2021-04-15 04:00:07,213 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 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) [2021-04-15 04:00:07,213 INFO L276 IsEmpty]: Start isEmpty. Operand 77888 states and 283521 transitions. [2021-04-15 04:00:07,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 04:00:07,386 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:00:07,386 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:00:07,600 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2021-04-15 04:00:07,601 INFO L428 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:00:07,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:00:07,601 INFO L82 PathProgramCache]: Analyzing trace with hash 1506823447, now seen corresponding path program 83 times [2021-04-15 04:00:07,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:00:07,601 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081618624] [2021-04-15 04:00:07,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:00:07,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:00:07,687 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:00:07,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081618624] [2021-04-15 04:00:07,687 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497464124] [2021-04-15 04:00:07,687 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 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 [2021-04-15 04:00:07,709 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-04-15 04:00:07,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:00:07,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-04-15 04:00:07,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:00:07,868 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:00:07,868 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:00:07,868 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-04-15 04:00:07,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119738390] [2021-04-15 04:00:07,869 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 04:00:07,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:00:07,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 04:00:07,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-04-15 04:00:07,869 INFO L87 Difference]: Start difference. First operand 77888 states and 283521 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 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) [2021-04-15 04:00:08,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:00:08,764 INFO L93 Difference]: Finished difference Result 85565 states and 309594 transitions. [2021-04-15 04:00:08,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-04-15 04:00:08,765 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 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 25 [2021-04-15 04:00:08,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:00:09,772 INFO L225 Difference]: With dead ends: 85565 [2021-04-15 04:00:09,772 INFO L226 Difference]: Without dead ends: 85370 [2021-04-15 04:00:09,792 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 238.9ms TimeCoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2021-04-15 04:00:09,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85370 states. [2021-04-15 04:00:11,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85370 to 78997. [2021-04-15 04:00:11,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78997 states, 78996 states have (on average 3.6391083092814824) internal successors, (287475), 78996 states have internal predecessors, (287475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:00:12,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78997 states to 78997 states and 287475 transitions. [2021-04-15 04:00:12,225 INFO L78 Accepts]: Start accepts. Automaton has 78997 states and 287475 transitions. Word has length 25 [2021-04-15 04:00:12,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:00:12,225 INFO L480 AbstractCegarLoop]: Abstraction has 78997 states and 287475 transitions. [2021-04-15 04:00:12,225 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 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) [2021-04-15 04:00:12,225 INFO L276 IsEmpty]: Start isEmpty. Operand 78997 states and 287475 transitions. [2021-04-15 04:00:12,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 04:00:12,403 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:00:12,403 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:00:12,603 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable216 [2021-04-15 04:00:12,603 INFO L428 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:00:12,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:00:12,604 INFO L82 PathProgramCache]: Analyzing trace with hash -1345964487, now seen corresponding path program 84 times [2021-04-15 04:00:12,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:00:12,604 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062218548] [2021-04-15 04:00:12,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:00:12,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:00:12,707 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:00:12,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062218548] [2021-04-15 04:00:12,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269371044] [2021-04-15 04:00:12,707 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2021-04-15 04:00:12,739 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-04-15 04:00:12,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:00:12,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-04-15 04:00:12,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:00:12,845 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:00:12,846 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:00:12,846 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 12 [2021-04-15 04:00:12,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594635144] [2021-04-15 04:00:12,846 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 04:00:12,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:00:12,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 04:00:12,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-04-15 04:00:12,846 INFO L87 Difference]: Start difference. First operand 78997 states and 287475 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 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) [2021-04-15 04:00:13,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:00:13,582 INFO L93 Difference]: Finished difference Result 79701 states and 289399 transitions. [2021-04-15 04:00:13,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-04-15 04:00:13,582 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 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 25 [2021-04-15 04:00:13,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:00:14,603 INFO L225 Difference]: With dead ends: 79701 [2021-04-15 04:00:14,603 INFO L226 Difference]: Without dead ends: 79594 [2021-04-15 04:00:14,603 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 170.5ms TimeCoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-04-15 04:00:14,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79594 states. [2021-04-15 04:00:16,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79594 to 79080. [2021-04-15 04:00:16,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79080 states, 79079 states have (on average 3.634719710669078) internal successors, (287430), 79079 states have internal predecessors, (287430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:00:17,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79080 states to 79080 states and 287430 transitions. [2021-04-15 04:00:17,158 INFO L78 Accepts]: Start accepts. Automaton has 79080 states and 287430 transitions. Word has length 25 [2021-04-15 04:00:17,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:00:17,159 INFO L480 AbstractCegarLoop]: Abstraction has 79080 states and 287430 transitions. [2021-04-15 04:00:17,159 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 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) [2021-04-15 04:00:17,159 INFO L276 IsEmpty]: Start isEmpty. Operand 79080 states and 287430 transitions. [2021-04-15 04:00:17,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 04:00:17,334 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:00:17,334 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:00:17,534 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:00:17,535 INFO L428 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:00:17,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:00:17,535 INFO L82 PathProgramCache]: Analyzing trace with hash 1425295639, now seen corresponding path program 85 times [2021-04-15 04:00:17,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:00:17,535 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838384678] [2021-04-15 04:00:17,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:00:17,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:00:17,601 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:00:17,602 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838384678] [2021-04-15 04:00:17,602 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755469794] [2021-04-15 04:00:17,602 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-15 04:00:17,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:00:17,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2021-04-15 04:00:17,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:00:17,774 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:00:17,774 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:00:17,774 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-04-15 04:00:17,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573210270] [2021-04-15 04:00:17,775 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 04:00:17,775 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:00:17,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 04:00:17,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-04-15 04:00:17,775 INFO L87 Difference]: Start difference. First operand 79080 states and 287430 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 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) [2021-04-15 04:00:19,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:00:19,882 INFO L93 Difference]: Finished difference Result 93002 states and 336576 transitions. [2021-04-15 04:00:19,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-04-15 04:00:19,883 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 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 25 [2021-04-15 04:00:19,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:00:20,277 INFO L225 Difference]: With dead ends: 93002 [2021-04-15 04:00:20,277 INFO L226 Difference]: Without dead ends: 92906 [2021-04-15 04:00:20,277 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 655.7ms TimeCoverageRelationStatistics Valid=286, Invalid=1046, Unknown=0, NotChecked=0, Total=1332 [2021-04-15 04:00:20,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92906 states. [2021-04-15 04:00:22,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92906 to 82584. [2021-04-15 04:00:22,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82584 states, 82583 states have (on average 3.6524829565406924) internal successors, (301633), 82583 states have internal predecessors, (301633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:00:23,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82584 states to 82584 states and 301633 transitions. [2021-04-15 04:00:23,030 INFO L78 Accepts]: Start accepts. Automaton has 82584 states and 301633 transitions. Word has length 25 [2021-04-15 04:00:23,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:00:23,030 INFO L480 AbstractCegarLoop]: Abstraction has 82584 states and 301633 transitions. [2021-04-15 04:00:23,030 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 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) [2021-04-15 04:00:23,030 INFO L276 IsEmpty]: Start isEmpty. Operand 82584 states and 301633 transitions. [2021-04-15 04:00:23,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 04:00:23,212 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:00:23,212 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:00:23,412 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable221 [2021-04-15 04:00:23,412 INFO L428 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:00:23,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:00:23,413 INFO L82 PathProgramCache]: Analyzing trace with hash 13627927, now seen corresponding path program 86 times [2021-04-15 04:00:23,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:00:23,413 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262307255] [2021-04-15 04:00:23,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:00:23,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:00:23,526 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:00:23,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262307255] [2021-04-15 04:00:23,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030938127] [2021-04-15 04:00:23,526 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2021-04-15 04:00:23,546 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 04:00:23,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:00:23,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 20 conjunts are in the unsatisfiable core [2021-04-15 04:00:23,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:00:23,705 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:00:23,706 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:00:23,706 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-04-15 04:00:23,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413301680] [2021-04-15 04:00:23,706 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 04:00:23,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:00:23,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 04:00:23,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-04-15 04:00:23,707 INFO L87 Difference]: Start difference. First operand 82584 states and 301633 transitions. Second operand has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 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) [2021-04-15 04:00:25,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:00:25,395 INFO L93 Difference]: Finished difference Result 101778 states and 369627 transitions. [2021-04-15 04:00:25,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-04-15 04:00:25,395 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 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 25 [2021-04-15 04:00:25,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:00:25,852 INFO L225 Difference]: With dead ends: 101778 [2021-04-15 04:00:25,853 INFO L226 Difference]: Without dead ends: 101745 [2021-04-15 04:00:25,853 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 420.6ms TimeCoverageRelationStatistics Valid=152, Invalid=550, Unknown=0, NotChecked=0, Total=702 [2021-04-15 04:00:25,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101745 states. [2021-04-15 04:00:28,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101745 to 82622. [2021-04-15 04:00:28,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82622 states, 82621 states have (on average 3.6528485494002734) internal successors, (301802), 82621 states have internal predecessors, (301802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:00:29,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82622 states to 82622 states and 301802 transitions. [2021-04-15 04:00:29,139 INFO L78 Accepts]: Start accepts. Automaton has 82622 states and 301802 transitions. Word has length 25 [2021-04-15 04:00:29,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:00:29,139 INFO L480 AbstractCegarLoop]: Abstraction has 82622 states and 301802 transitions. [2021-04-15 04:00:29,139 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 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) [2021-04-15 04:00:29,139 INFO L276 IsEmpty]: Start isEmpty. Operand 82622 states and 301802 transitions. [2021-04-15 04:00:29,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 04:00:29,306 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:00:29,306 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:00:29,528 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable225 [2021-04-15 04:00:29,529 INFO L428 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:00:29,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:00:29,529 INFO L82 PathProgramCache]: Analyzing trace with hash 992185371, now seen corresponding path program 87 times [2021-04-15 04:00:29,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:00:29,529 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195464469] [2021-04-15 04:00:29,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:00:29,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:00:29,683 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:00:29,683 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195464469] [2021-04-15 04:00:29,683 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672867959] [2021-04-15 04:00:29,683 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2021-04-15 04:00:29,708 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-04-15 04:00:29,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:00:29,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 20 conjunts are in the unsatisfiable core [2021-04-15 04:00:29,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:00:29,925 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:00:29,925 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:00:29,925 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-04-15 04:00:29,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418512073] [2021-04-15 04:00:29,925 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 04:00:29,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:00:29,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 04:00:29,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-04-15 04:00:29,926 INFO L87 Difference]: Start difference. First operand 82622 states and 301802 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 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) [2021-04-15 04:00:31,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:00:31,132 INFO L93 Difference]: Finished difference Result 103177 states and 374373 transitions. [2021-04-15 04:00:31,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-04-15 04:00:31,132 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 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 25 [2021-04-15 04:00:31,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:00:31,461 INFO L225 Difference]: With dead ends: 103177 [2021-04-15 04:00:31,461 INFO L226 Difference]: Without dead ends: 103066 [2021-04-15 04:00:31,461 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 554.0ms TimeCoverageRelationStatistics Valid=195, Invalid=675, Unknown=0, NotChecked=0, Total=870 [2021-04-15 04:00:32,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103066 states. [2021-04-15 04:00:34,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103066 to 82700. [2021-04-15 04:00:34,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82700 states, 82699 states have (on average 3.653224343704277) internal successors, (302118), 82699 states have internal predecessors, (302118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:00:34,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82700 states to 82700 states and 302118 transitions. [2021-04-15 04:00:34,521 INFO L78 Accepts]: Start accepts. Automaton has 82700 states and 302118 transitions. Word has length 25 [2021-04-15 04:00:34,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:00:34,521 INFO L480 AbstractCegarLoop]: Abstraction has 82700 states and 302118 transitions. [2021-04-15 04:00:34,521 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 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) [2021-04-15 04:00:34,521 INFO L276 IsEmpty]: Start isEmpty. Operand 82700 states and 302118 transitions. [2021-04-15 04:00:34,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 04:00:34,685 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:00:34,685 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:00:34,885 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable229,134 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:00:34,886 INFO L428 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:00:34,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:00:34,886 INFO L82 PathProgramCache]: Analyzing trace with hash 193145367, now seen corresponding path program 88 times [2021-04-15 04:00:34,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:00:34,886 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908903696] [2021-04-15 04:00:34,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:00:34,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:00:35,000 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:00:35,000 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908903696] [2021-04-15 04:00:35,000 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693981229] [2021-04-15 04:00:35,000 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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 [2021-04-15 04:00:35,019 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 04:00:35,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:00:35,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 20 conjunts are in the unsatisfiable core [2021-04-15 04:00:35,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:00:35,194 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:00:35,194 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:00:35,194 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-04-15 04:00:35,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344451288] [2021-04-15 04:00:35,194 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 04:00:35,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:00:35,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 04:00:35,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2021-04-15 04:00:35,195 INFO L87 Difference]: Start difference. First operand 82700 states and 302118 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 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) [2021-04-15 04:00:37,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:00:37,024 INFO L93 Difference]: Finished difference Result 96794 states and 354161 transitions. [2021-04-15 04:00:37,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-04-15 04:00:37,024 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 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 25 [2021-04-15 04:00:37,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:00:37,446 INFO L225 Difference]: With dead ends: 96794 [2021-04-15 04:00:37,447 INFO L226 Difference]: Without dead ends: 96755 [2021-04-15 04:00:37,447 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 561.9ms TimeCoverageRelationStatistics Valid=269, Invalid=853, Unknown=0, NotChecked=0, Total=1122 [2021-04-15 04:00:37,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96755 states. [2021-04-15 04:00:39,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96755 to 82707. [2021-04-15 04:00:39,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82707 states, 82706 states have (on average 3.6533987860614707) internal successors, (302158), 82706 states have internal predecessors, (302158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:00:40,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82707 states to 82707 states and 302158 transitions. [2021-04-15 04:00:40,082 INFO L78 Accepts]: Start accepts. Automaton has 82707 states and 302158 transitions. Word has length 25 [2021-04-15 04:00:40,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:00:40,083 INFO L480 AbstractCegarLoop]: Abstraction has 82707 states and 302158 transitions. [2021-04-15 04:00:40,083 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 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) [2021-04-15 04:00:40,083 INFO L276 IsEmpty]: Start isEmpty. Operand 82707 states and 302158 transitions. [2021-04-15 04:00:40,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 04:00:40,260 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:00:40,260 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:00:40,460 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable233 [2021-04-15 04:00:40,460 INFO L428 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:00:40,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:00:40,460 INFO L82 PathProgramCache]: Analyzing trace with hash -1088286225, now seen corresponding path program 89 times [2021-04-15 04:00:40,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:00:40,461 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165404236] [2021-04-15 04:00:40,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:00:40,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:00:40,588 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:00:40,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165404236] [2021-04-15 04:00:40,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987155003] [2021-04-15 04:00:40,589 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-15 04:00:40,608 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 04:00:40,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:00:40,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 20 conjunts are in the unsatisfiable core [2021-04-15 04:00:40,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:00:41,125 WARN L205 SmtUtils]: Spent 467.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2021-04-15 04:00:41,307 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:00:41,308 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:00:41,308 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-04-15 04:00:41,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749270483] [2021-04-15 04:00:41,308 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 04:00:41,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:00:41,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 04:00:41,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-04-15 04:00:41,308 INFO L87 Difference]: Start difference. First operand 82707 states and 302158 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 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) [2021-04-15 04:00:42,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:00:42,547 INFO L93 Difference]: Finished difference Result 86057 states and 312714 transitions. [2021-04-15 04:00:42,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-04-15 04:00:42,547 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 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 25 [2021-04-15 04:00:42,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:00:42,887 INFO L225 Difference]: With dead ends: 86057 [2021-04-15 04:00:42,887 INFO L226 Difference]: Without dead ends: 86028 [2021-04-15 04:00:42,887 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 622.5ms TimeCoverageRelationStatistics Valid=201, Invalid=791, Unknown=0, NotChecked=0, Total=992 [2021-04-15 04:00:42,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86028 states. [2021-04-15 04:00:44,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86028 to 82747. [2021-04-15 04:00:45,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82747 states, 82746 states have (on average 3.6533488023590266) internal successors, (302300), 82746 states have internal predecessors, (302300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:00:45,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82747 states to 82747 states and 302300 transitions. [2021-04-15 04:00:45,915 INFO L78 Accepts]: Start accepts. Automaton has 82747 states and 302300 transitions. Word has length 25 [2021-04-15 04:00:45,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:00:45,916 INFO L480 AbstractCegarLoop]: Abstraction has 82747 states and 302300 transitions. [2021-04-15 04:00:45,916 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 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) [2021-04-15 04:00:45,916 INFO L276 IsEmpty]: Start isEmpty. Operand 82747 states and 302300 transitions. [2021-04-15 04:00:46,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 04:00:46,091 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:00:46,091 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:00:46,302 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable237 [2021-04-15 04:00:46,302 INFO L428 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:00:46,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:00:46,302 INFO L82 PathProgramCache]: Analyzing trace with hash -1887326229, now seen corresponding path program 90 times [2021-04-15 04:00:46,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:00:46,302 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479914808] [2021-04-15 04:00:46,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:00:46,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:00:46,441 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:00:46,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479914808] [2021-04-15 04:00:46,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670931242] [2021-04-15 04:00:46,442 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2021-04-15 04:00:46,466 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-04-15 04:00:46,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:00:46,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 20 conjunts are in the unsatisfiable core [2021-04-15 04:00:46,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:00:46,699 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:00:46,699 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:00:46,700 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-04-15 04:00:46,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41282597] [2021-04-15 04:00:46,700 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 04:00:46,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:00:46,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 04:00:46,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2021-04-15 04:00:46,701 INFO L87 Difference]: Start difference. First operand 82747 states and 302300 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 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) [2021-04-15 04:00:48,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:00:48,074 INFO L93 Difference]: Finished difference Result 103229 states and 374639 transitions. [2021-04-15 04:00:48,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-04-15 04:00:48,075 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 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 25 [2021-04-15 04:00:48,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:00:48,416 INFO L225 Difference]: With dead ends: 103229 [2021-04-15 04:00:48,416 INFO L226 Difference]: Without dead ends: 103204 [2021-04-15 04:00:48,416 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 739.7ms TimeCoverageRelationStatistics Valid=264, Invalid=926, Unknown=0, NotChecked=0, Total=1190 [2021-04-15 04:00:49,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103204 states. [2021-04-15 04:00:50,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103204 to 82753. [2021-04-15 04:00:51,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82753 states, 82752 states have (on average 3.653688128383604) internal successors, (302350), 82752 states have internal predecessors, (302350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:00:51,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82753 states to 82753 states and 302350 transitions. [2021-04-15 04:00:51,371 INFO L78 Accepts]: Start accepts. Automaton has 82753 states and 302350 transitions. Word has length 25 [2021-04-15 04:00:51,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:00:51,371 INFO L480 AbstractCegarLoop]: Abstraction has 82753 states and 302350 transitions. [2021-04-15 04:00:51,371 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 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) [2021-04-15 04:00:51,371 INFO L276 IsEmpty]: Start isEmpty. Operand 82753 states and 302350 transitions. [2021-04-15 04:00:51,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 04:00:51,536 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:00:51,536 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:00:51,737 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable241,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:00:51,737 INFO L428 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:00:51,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:00:51,737 INFO L82 PathProgramCache]: Analyzing trace with hash -1968725285, now seen corresponding path program 91 times [2021-04-15 04:00:51,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:00:51,738 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499358992] [2021-04-15 04:00:51,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:00:51,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:00:51,841 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:00:51,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499358992] [2021-04-15 04:00:51,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598767214] [2021-04-15 04:00:51,841 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2021-04-15 04:00:51,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:00:51,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 20 conjunts are in the unsatisfiable core [2021-04-15 04:00:51,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:00:52,053 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:00:52,053 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:00:52,053 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-04-15 04:00:52,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110637937] [2021-04-15 04:00:52,054 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 04:00:52,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:00:52,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 04:00:52,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2021-04-15 04:00:52,054 INFO L87 Difference]: Start difference. First operand 82753 states and 302350 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 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) [2021-04-15 04:00:54,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:00:54,019 INFO L93 Difference]: Finished difference Result 101891 states and 369911 transitions. [2021-04-15 04:00:54,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-04-15 04:00:54,020 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 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 25 [2021-04-15 04:00:54,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:00:54,502 INFO L225 Difference]: With dead ends: 101891 [2021-04-15 04:00:54,502 INFO L226 Difference]: Without dead ends: 101837 [2021-04-15 04:00:54,503 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 447 ImplicationChecksByTransitivity, 637.9ms TimeCoverageRelationStatistics Valid=335, Invalid=1147, Unknown=0, NotChecked=0, Total=1482 [2021-04-15 04:00:54,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101837 states. [2021-04-15 04:00:56,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101837 to 82801. [2021-04-15 04:00:57,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82801 states, 82800 states have (on average 3.654021739130435) internal successors, (302553), 82800 states have internal predecessors, (302553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:00:57,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82801 states to 82801 states and 302553 transitions. [2021-04-15 04:00:57,445 INFO L78 Accepts]: Start accepts. Automaton has 82801 states and 302553 transitions. Word has length 25 [2021-04-15 04:00:57,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:00:57,446 INFO L480 AbstractCegarLoop]: Abstraction has 82801 states and 302553 transitions. [2021-04-15 04:00:57,446 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 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) [2021-04-15 04:00:57,446 INFO L276 IsEmpty]: Start isEmpty. Operand 82801 states and 302553 transitions. [2021-04-15 04:00:58,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 04:00:58,187 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:00:58,188 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:00:58,400 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable245 [2021-04-15 04:00:58,401 INFO L428 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:00:58,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:00:58,401 INFO L82 PathProgramCache]: Analyzing trace with hash -762250593, now seen corresponding path program 92 times [2021-04-15 04:00:58,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:00:58,401 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665895388] [2021-04-15 04:00:58,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:00:58,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:00:58,518 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:00:58,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665895388] [2021-04-15 04:00:58,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681117739] [2021-04-15 04:00:58,519 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2021-04-15 04:00:58,545 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 04:00:58,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:00:58,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 20 conjunts are in the unsatisfiable core [2021-04-15 04:00:58,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:00:58,776 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:00:58,777 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:00:58,777 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-04-15 04:00:58,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083270534] [2021-04-15 04:00:58,777 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 04:00:58,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:00:58,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 04:00:58,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2021-04-15 04:00:58,778 INFO L87 Difference]: Start difference. First operand 82801 states and 302553 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 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) [2021-04-15 04:01:00,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:01:00,098 INFO L93 Difference]: Finished difference Result 104308 states and 378421 transitions. [2021-04-15 04:01:00,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-04-15 04:01:00,099 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 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 25 [2021-04-15 04:01:00,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:01:00,558 INFO L225 Difference]: With dead ends: 104308 [2021-04-15 04:01:00,559 INFO L226 Difference]: Without dead ends: 104254 [2021-04-15 04:01:00,559 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 616.5ms TimeCoverageRelationStatistics Valid=221, Invalid=771, Unknown=0, NotChecked=0, Total=992 [2021-04-15 04:01:00,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104254 states. [2021-04-15 04:01:03,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104254 to 82930. [2021-04-15 04:01:03,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82930 states, 82929 states have (on average 3.655174908656803) internal successors, (303120), 82929 states have internal predecessors, (303120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:01:03,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82930 states to 82930 states and 303120 transitions. [2021-04-15 04:01:03,881 INFO L78 Accepts]: Start accepts. Automaton has 82930 states and 303120 transitions. Word has length 25 [2021-04-15 04:01:03,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:01:03,881 INFO L480 AbstractCegarLoop]: Abstraction has 82930 states and 303120 transitions. [2021-04-15 04:01:03,881 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 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) [2021-04-15 04:01:03,881 INFO L276 IsEmpty]: Start isEmpty. Operand 82930 states and 303120 transitions. [2021-04-15 04:01:04,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 04:01:04,062 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:01:04,062 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:01:04,262 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable249 [2021-04-15 04:01:04,263 INFO L428 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:01:04,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:01:04,263 INFO L82 PathProgramCache]: Analyzing trace with hash -348634661, now seen corresponding path program 93 times [2021-04-15 04:01:04,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:01:04,263 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373531767] [2021-04-15 04:01:04,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:01:04,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:01:04,358 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:01:04,358 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373531767] [2021-04-15 04:01:04,358 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012508200] [2021-04-15 04:01:04,358 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2021-04-15 04:01:04,381 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-04-15 04:01:04,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:01:04,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 20 conjunts are in the unsatisfiable core [2021-04-15 04:01:04,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:01:04,596 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:01:04,596 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:01:04,596 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-04-15 04:01:04,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260515462] [2021-04-15 04:01:04,597 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-04-15 04:01:04,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:01:04,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-04-15 04:01:04,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2021-04-15 04:01:04,597 INFO L87 Difference]: Start difference. First operand 82930 states and 303120 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 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) [2021-04-15 04:01:07,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:01:07,012 INFO L93 Difference]: Finished difference Result 104844 states and 380453 transitions. [2021-04-15 04:01:07,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-04-15 04:01:07,013 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 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 25 [2021-04-15 04:01:07,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:01:07,834 INFO L225 Difference]: With dead ends: 104844 [2021-04-15 04:01:07,835 INFO L226 Difference]: Without dead ends: 104794 [2021-04-15 04:01:07,835 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 409 ImplicationChecksByTransitivity, 760.2ms TimeCoverageRelationStatistics Valid=310, Invalid=1172, Unknown=0, NotChecked=0, Total=1482 [2021-04-15 04:01:08,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104794 states. [2021-04-15 04:01:09,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104794 to 82950. [2021-04-15 04:01:10,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82950 states, 82949 states have (on average 3.655824663347358) internal successors, (303247), 82949 states have internal predecessors, (303247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:01:10,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82950 states to 82950 states and 303247 transitions. [2021-04-15 04:01:10,462 INFO L78 Accepts]: Start accepts. Automaton has 82950 states and 303247 transitions. Word has length 25 [2021-04-15 04:01:10,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:01:10,462 INFO L480 AbstractCegarLoop]: Abstraction has 82950 states and 303247 transitions. [2021-04-15 04:01:10,462 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 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) [2021-04-15 04:01:10,462 INFO L276 IsEmpty]: Start isEmpty. Operand 82950 states and 303247 transitions. [2021-04-15 04:01:10,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 04:01:10,647 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:01:10,647 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:01:10,859 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable253,140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:01:10,860 INFO L428 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:01:10,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:01:10,860 INFO L82 PathProgramCache]: Analyzing trace with hash -540119201, now seen corresponding path program 94 times [2021-04-15 04:01:10,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:01:10,860 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049826263] [2021-04-15 04:01:10,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:01:10,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:01:10,955 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:01:10,956 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049826263] [2021-04-15 04:01:10,956 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810148206] [2021-04-15 04:01:10,956 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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 [2021-04-15 04:01:10,980 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 04:01:10,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:01:10,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2021-04-15 04:01:10,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:01:11,146 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:01:11,146 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:01:11,146 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-04-15 04:01:11,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573438263] [2021-04-15 04:01:11,146 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 04:01:11,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:01:11,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 04:01:11,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2021-04-15 04:01:11,147 INFO L87 Difference]: Start difference. First operand 82950 states and 303247 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 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) [2021-04-15 04:01:12,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:01:12,810 INFO L93 Difference]: Finished difference Result 83650 states and 305194 transitions. [2021-04-15 04:01:12,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 04:01:12,811 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 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 25 [2021-04-15 04:01:12,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:01:13,204 INFO L225 Difference]: With dead ends: 83650 [2021-04-15 04:01:13,204 INFO L226 Difference]: Without dead ends: 83593 [2021-04-15 04:01:13,205 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 276.0ms TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-04-15 04:01:13,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83593 states. [2021-04-15 04:01:15,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83593 to 83014. [2021-04-15 04:01:15,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83014 states, 83013 states have (on average 3.655499741004421) internal successors, (303454), 83013 states have internal predecessors, (303454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:01:15,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83014 states to 83014 states and 303454 transitions. [2021-04-15 04:01:15,876 INFO L78 Accepts]: Start accepts. Automaton has 83014 states and 303454 transitions. Word has length 25 [2021-04-15 04:01:15,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:01:15,876 INFO L480 AbstractCegarLoop]: Abstraction has 83014 states and 303454 transitions. [2021-04-15 04:01:15,876 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 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) [2021-04-15 04:01:15,876 INFO L276 IsEmpty]: Start isEmpty. Operand 83014 states and 303454 transitions. [2021-04-15 04:01:16,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 04:01:16,066 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:01:16,066 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:01:16,266 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable257 [2021-04-15 04:01:16,267 INFO L428 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:01:16,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:01:16,267 INFO L82 PathProgramCache]: Analyzing trace with hash -1951786913, now seen corresponding path program 95 times [2021-04-15 04:01:16,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:01:16,267 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194647768] [2021-04-15 04:01:16,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:01:16,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:01:16,416 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:01:16,417 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194647768] [2021-04-15 04:01:16,417 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760711024] [2021-04-15 04:01:16,417 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 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 [2021-04-15 04:01:16,445 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-04-15 04:01:16,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:01:16,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 20 conjunts are in the unsatisfiable core [2021-04-15 04:01:16,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:01:16,599 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:01:16,599 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:01:16,599 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-04-15 04:01:16,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663787571] [2021-04-15 04:01:16,599 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 04:01:16,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:01:16,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 04:01:16,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-04-15 04:01:16,600 INFO L87 Difference]: Start difference. First operand 83014 states and 303454 transitions. Second operand has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 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) [2021-04-15 04:01:18,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:01:18,095 INFO L93 Difference]: Finished difference Result 101895 states and 370336 transitions. [2021-04-15 04:01:18,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-04-15 04:01:18,096 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 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 25 [2021-04-15 04:01:18,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:01:18,560 INFO L225 Difference]: With dead ends: 101895 [2021-04-15 04:01:18,560 INFO L226 Difference]: Without dead ends: 101844 [2021-04-15 04:01:18,561 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 812.3ms TimeCoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2021-04-15 04:01:18,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101844 states. [2021-04-15 04:01:20,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101844 to 83387. [2021-04-15 04:01:21,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83387 states, 83386 states have (on average 3.6548461372412637) internal successors, (304763), 83386 states have internal predecessors, (304763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:01:22,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83387 states to 83387 states and 304763 transitions. [2021-04-15 04:01:22,023 INFO L78 Accepts]: Start accepts. Automaton has 83387 states and 304763 transitions. Word has length 25 [2021-04-15 04:01:22,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:01:22,023 INFO L480 AbstractCegarLoop]: Abstraction has 83387 states and 304763 transitions. [2021-04-15 04:01:22,023 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5) internal successors, (40), 15 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) [2021-04-15 04:01:22,023 INFO L276 IsEmpty]: Start isEmpty. Operand 83387 states and 304763 transitions. [2021-04-15 04:01:22,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 04:01:22,220 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:01:22,221 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:01:22,436 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable260 [2021-04-15 04:01:22,437 INFO L428 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:01:22,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:01:22,437 INFO L82 PathProgramCache]: Analyzing trace with hash -973229469, now seen corresponding path program 96 times [2021-04-15 04:01:22,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:01:22,437 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747700869] [2021-04-15 04:01:22,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:01:22,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:01:22,587 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:01:22,587 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747700869] [2021-04-15 04:01:22,587 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892069388] [2021-04-15 04:01:22,587 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2021-04-15 04:01:22,627 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-04-15 04:01:22,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:01:22,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 20 conjunts are in the unsatisfiable core [2021-04-15 04:01:22,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:01:22,854 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:01:22,854 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:01:22,854 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-04-15 04:01:22,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274376942] [2021-04-15 04:01:22,854 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 04:01:22,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:01:22,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 04:01:22,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-04-15 04:01:22,855 INFO L87 Difference]: Start difference. First operand 83387 states and 304763 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 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) [2021-04-15 04:01:23,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:01:23,933 INFO L93 Difference]: Finished difference Result 118503 states and 424280 transitions. [2021-04-15 04:01:23,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 04:01:23,934 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 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 25 [2021-04-15 04:01:23,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:01:24,442 INFO L225 Difference]: With dead ends: 118503 [2021-04-15 04:01:24,443 INFO L226 Difference]: Without dead ends: 118331 [2021-04-15 04:01:24,443 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 414.8ms TimeCoverageRelationStatistics Valid=114, Invalid=392, Unknown=0, NotChecked=0, Total=506 [2021-04-15 04:01:24,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118331 states. [2021-04-15 04:01:27,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118331 to 83387. [2021-04-15 04:01:27,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83387 states, 83386 states have (on average 3.653311107380136) internal successors, (304635), 83386 states have internal predecessors, (304635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:01:27,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83387 states to 83387 states and 304635 transitions. [2021-04-15 04:01:27,943 INFO L78 Accepts]: Start accepts. Automaton has 83387 states and 304635 transitions. Word has length 25 [2021-04-15 04:01:27,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:01:27,944 INFO L480 AbstractCegarLoop]: Abstraction has 83387 states and 304635 transitions. [2021-04-15 04:01:27,944 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 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) [2021-04-15 04:01:27,944 INFO L276 IsEmpty]: Start isEmpty. Operand 83387 states and 304635 transitions. [2021-04-15 04:01:28,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 04:01:28,121 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:01:28,122 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:01:28,322 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable263,143 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:01:28,322 INFO L428 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:01:28,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:01:28,323 INFO L82 PathProgramCache]: Analyzing trace with hash -1772269473, now seen corresponding path program 97 times [2021-04-15 04:01:28,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:01:28,323 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689797838] [2021-04-15 04:01:28,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:01:28,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:01:28,472 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:01:28,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689797838] [2021-04-15 04:01:28,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336982454] [2021-04-15 04:01:28,472 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2021-04-15 04:01:28,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:01:28,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 20 conjunts are in the unsatisfiable core [2021-04-15 04:01:28,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:01:28,731 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:01:28,731 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:01:28,732 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-04-15 04:01:28,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357179989] [2021-04-15 04:01:28,732 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 04:01:28,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:01:28,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 04:01:28,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2021-04-15 04:01:28,732 INFO L87 Difference]: Start difference. First operand 83387 states and 304635 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 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) [2021-04-15 04:01:31,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:01:31,115 INFO L93 Difference]: Finished difference Result 107775 states and 385439 transitions. [2021-04-15 04:01:31,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-04-15 04:01:31,116 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 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 25 [2021-04-15 04:01:31,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:01:31,624 INFO L225 Difference]: With dead ends: 107775 [2021-04-15 04:01:31,624 INFO L226 Difference]: Without dead ends: 107433 [2021-04-15 04:01:31,625 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 1453.0ms TimeCoverageRelationStatistics Valid=428, Invalid=1294, Unknown=0, NotChecked=0, Total=1722 [2021-04-15 04:01:31,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107433 states. [2021-04-15 04:01:34,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107433 to 83451. [2021-04-15 04:01:34,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83451 states, 83450 states have (on average 3.6541282204913124) internal successors, (304937), 83450 states have internal predecessors, (304937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:01:35,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83451 states to 83451 states and 304937 transitions. [2021-04-15 04:01:35,443 INFO L78 Accepts]: Start accepts. Automaton has 83451 states and 304937 transitions. Word has length 25 [2021-04-15 04:01:35,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:01:35,443 INFO L480 AbstractCegarLoop]: Abstraction has 83451 states and 304937 transitions. [2021-04-15 04:01:35,443 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 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) [2021-04-15 04:01:35,443 INFO L276 IsEmpty]: Start isEmpty. Operand 83451 states and 304937 transitions. [2021-04-15 04:01:35,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 04:01:35,639 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:01:35,639 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:01:35,852 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable266 [2021-04-15 04:01:35,853 INFO L428 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:01:35,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:01:35,853 INFO L82 PathProgramCache]: Analyzing trace with hash -305853537, now seen corresponding path program 98 times [2021-04-15 04:01:35,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:01:35,853 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564330494] [2021-04-15 04:01:35,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:01:35,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:01:35,954 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:01:35,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564330494] [2021-04-15 04:01:35,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538796191] [2021-04-15 04:01:35,955 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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) [2021-04-15 04:01:35,982 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 04:01:35,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:01:35,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2021-04-15 04:01:35,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:01:36,120 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:01:36,120 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:01:36,121 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-04-15 04:01:36,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190093784] [2021-04-15 04:01:36,121 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 04:01:36,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:01:36,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 04:01:36,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-04-15 04:01:36,121 INFO L87 Difference]: Start difference. First operand 83451 states and 304937 transitions. Second operand has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 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) [2021-04-15 04:01:36,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:01:36,783 INFO L93 Difference]: Finished difference Result 85169 states and 310460 transitions. [2021-04-15 04:01:36,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-04-15 04:01:36,784 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 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 25 [2021-04-15 04:01:36,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:01:37,184 INFO L225 Difference]: With dead ends: 85169 [2021-04-15 04:01:37,185 INFO L226 Difference]: Without dead ends: 85104 [2021-04-15 04:01:37,185 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 201.7ms TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-04-15 04:01:37,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85104 states. [2021-04-15 04:01:40,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85104 to 84746. [2021-04-15 04:01:40,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84746 states, 84745 states have (on average 3.650185851672665) internal successors, (309335), 84745 states have internal predecessors, (309335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:01:40,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84746 states to 84746 states and 309335 transitions. [2021-04-15 04:01:40,619 INFO L78 Accepts]: Start accepts. Automaton has 84746 states and 309335 transitions. Word has length 25 [2021-04-15 04:01:40,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:01:40,619 INFO L480 AbstractCegarLoop]: Abstraction has 84746 states and 309335 transitions. [2021-04-15 04:01:40,619 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 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) [2021-04-15 04:01:40,619 INFO L276 IsEmpty]: Start isEmpty. Operand 84746 states and 309335 transitions. [2021-04-15 04:01:40,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 04:01:40,826 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:01:40,826 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:01:41,032 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable269 [2021-04-15 04:01:41,033 INFO L428 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:01:41,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:01:41,033 INFO L82 PathProgramCache]: Analyzing trace with hash -1461906909, now seen corresponding path program 99 times [2021-04-15 04:01:41,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:01:41,033 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565450808] [2021-04-15 04:01:41,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:01:41,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:01:41,127 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:01:41,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565450808] [2021-04-15 04:01:41,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649422046] [2021-04-15 04:01:41,127 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2021-04-15 04:01:41,148 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-04-15 04:01:41,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:01:41,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 18 conjunts are in the unsatisfiable core [2021-04-15 04:01:41,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:01:41,276 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:01:41,277 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:01:41,277 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 15 [2021-04-15 04:01:41,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748875908] [2021-04-15 04:01:41,277 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 04:01:41,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:01:41,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 04:01:41,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-04-15 04:01:41,277 INFO L87 Difference]: Start difference. First operand 84746 states and 309335 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 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) [2021-04-15 04:01:42,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:01:42,375 INFO L93 Difference]: Finished difference Result 87126 states and 316831 transitions. [2021-04-15 04:01:42,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-04-15 04:01:42,376 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 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 25 [2021-04-15 04:01:42,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:01:43,402 INFO L225 Difference]: With dead ends: 87126 [2021-04-15 04:01:43,402 INFO L226 Difference]: Without dead ends: 86947 [2021-04-15 04:01:43,403 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 316.5ms TimeCoverageRelationStatistics Valid=106, Invalid=446, Unknown=0, NotChecked=0, Total=552 [2021-04-15 04:01:43,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86947 states. [2021-04-15 04:01:45,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86947 to 84117. [2021-04-15 04:01:45,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84117 states, 84116 states have (on average 3.6500665747301344) internal successors, (307029), 84116 states have internal predecessors, (307029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:01:46,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84117 states to 84117 states and 307029 transitions. [2021-04-15 04:01:46,163 INFO L78 Accepts]: Start accepts. Automaton has 84117 states and 307029 transitions. Word has length 25 [2021-04-15 04:01:46,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:01:46,163 INFO L480 AbstractCegarLoop]: Abstraction has 84117 states and 307029 transitions. [2021-04-15 04:01:46,163 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 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) [2021-04-15 04:01:46,163 INFO L276 IsEmpty]: Start isEmpty. Operand 84117 states and 307029 transitions. [2021-04-15 04:01:46,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 04:01:46,369 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:01:46,369 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:01:46,569 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable270,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:01:46,570 INFO L428 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:01:46,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:01:46,570 INFO L82 PathProgramCache]: Analyzing trace with hash -426128515, now seen corresponding path program 100 times [2021-04-15 04:01:46,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:01:46,570 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169974886] [2021-04-15 04:01:46,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:01:46,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:01:46,703 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:01:46,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169974886] [2021-04-15 04:01:46,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335422606] [2021-04-15 04:01:46,704 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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 [2021-04-15 04:01:46,723 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 04:01:46,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:01:46,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 20 conjunts are in the unsatisfiable core [2021-04-15 04:01:46,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:01:46,851 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:01:46,851 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:01:46,851 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-04-15 04:01:46,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868433359] [2021-04-15 04:01:46,852 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 04:01:46,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:01:46,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 04:01:46,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-04-15 04:01:46,852 INFO L87 Difference]: Start difference. First operand 84117 states and 307029 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 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) [2021-04-15 04:01:48,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:01:48,316 INFO L93 Difference]: Finished difference Result 84717 states and 308618 transitions. [2021-04-15 04:01:48,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-04-15 04:01:48,329 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 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 25 [2021-04-15 04:01:48,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:01:48,812 INFO L225 Difference]: With dead ends: 84717 [2021-04-15 04:01:48,812 INFO L226 Difference]: Without dead ends: 84676 [2021-04-15 04:01:48,812 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 260.8ms TimeCoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-04-15 04:01:48,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84676 states. [2021-04-15 04:01:51,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84676 to 84333. [2021-04-15 04:01:51,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84333 states, 84332 states have (on average 3.648247403120998) internal successors, (307664), 84332 states have internal predecessors, (307664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:01:51,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84333 states to 84333 states and 307664 transitions. [2021-04-15 04:01:51,684 INFO L78 Accepts]: Start accepts. Automaton has 84333 states and 307664 transitions. Word has length 25 [2021-04-15 04:01:51,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:01:51,684 INFO L480 AbstractCegarLoop]: Abstraction has 84333 states and 307664 transitions. [2021-04-15 04:01:51,684 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 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) [2021-04-15 04:01:51,684 INFO L276 IsEmpty]: Start isEmpty. Operand 84333 states and 307664 transitions. [2021-04-15 04:01:51,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 04:01:51,888 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:01:51,888 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:01:52,088 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable272,147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:01:52,089 INFO L428 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:01:52,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:01:52,089 INFO L82 PathProgramCache]: Analyzing trace with hash -1484388057, now seen corresponding path program 101 times [2021-04-15 04:01:52,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:01:52,089 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335450203] [2021-04-15 04:01:52,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:01:52,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:01:52,219 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:01:52,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335450203] [2021-04-15 04:01:52,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031681270] [2021-04-15 04:01:52,219 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 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 [2021-04-15 04:01:52,241 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-04-15 04:01:52,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:01:52,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-04-15 04:01:52,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:01:52,373 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:01:52,374 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:01:52,374 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-04-15 04:01:52,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612241458] [2021-04-15 04:01:52,374 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 04:01:52,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:01:52,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 04:01:52,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-04-15 04:01:52,375 INFO L87 Difference]: Start difference. First operand 84333 states and 307664 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 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) [2021-04-15 04:01:53,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:01:53,801 INFO L93 Difference]: Finished difference Result 84484 states and 308032 transitions. [2021-04-15 04:01:53,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-04-15 04:01:53,802 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 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 25 [2021-04-15 04:01:53,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:01:54,216 INFO L225 Difference]: With dead ends: 84484 [2021-04-15 04:01:54,216 INFO L226 Difference]: Without dead ends: 84421 [2021-04-15 04:01:54,216 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 264.3ms TimeCoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-04-15 04:01:54,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84421 states. [2021-04-15 04:01:56,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84421 to 84332. [2021-04-15 04:01:56,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84332 states, 84331 states have (on average 3.6482432320261826) internal successors, (307660), 84331 states have internal predecessors, (307660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:01:57,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84332 states to 84332 states and 307660 transitions. [2021-04-15 04:01:57,195 INFO L78 Accepts]: Start accepts. Automaton has 84332 states and 307660 transitions. Word has length 25 [2021-04-15 04:01:57,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:01:57,195 INFO L480 AbstractCegarLoop]: Abstraction has 84332 states and 307660 transitions. [2021-04-15 04:01:57,195 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 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) [2021-04-15 04:01:57,195 INFO L276 IsEmpty]: Start isEmpty. Operand 84332 states and 307660 transitions. [2021-04-15 04:01:57,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 04:01:57,394 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:01:57,394 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:01:57,594 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable273,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:01:57,595 INFO L428 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:01:57,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:01:57,595 INFO L82 PathProgramCache]: Analyzing trace with hash 1814796211, now seen corresponding path program 102 times [2021-04-15 04:01:57,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:01:57,595 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801272313] [2021-04-15 04:01:57,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:01:57,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:01:57,707 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:01:57,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801272313] [2021-04-15 04:01:57,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791253158] [2021-04-15 04:01:57,708 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 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 [2021-04-15 04:01:57,728 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-04-15 04:01:57,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:01:57,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-04-15 04:01:57,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:01:57,920 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:01:57,920 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:01:57,920 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-04-15 04:01:57,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043429905] [2021-04-15 04:01:57,921 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 04:01:57,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:01:57,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 04:01:57,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-04-15 04:01:57,925 INFO L87 Difference]: Start difference. First operand 84332 states and 307660 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 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) [2021-04-15 04:01:59,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:01:59,572 INFO L93 Difference]: Finished difference Result 102491 states and 372284 transitions. [2021-04-15 04:01:59,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-04-15 04:01:59,573 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 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 25 [2021-04-15 04:01:59,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:02:00,006 INFO L225 Difference]: With dead ends: 102491 [2021-04-15 04:02:00,006 INFO L226 Difference]: Without dead ends: 102417 [2021-04-15 04:02:00,006 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 334.2ms TimeCoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2021-04-15 04:02:00,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102417 states. [2021-04-15 04:02:02,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102417 to 84341. [2021-04-15 04:02:02,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84341 states, 84340 states have (on average 3.6482689115484943) internal successors, (307695), 84340 states have internal predecessors, (307695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:02:04,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84341 states to 84341 states and 307695 transitions. [2021-04-15 04:02:04,015 INFO L78 Accepts]: Start accepts. Automaton has 84341 states and 307695 transitions. Word has length 25 [2021-04-15 04:02:04,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:02:04,015 INFO L480 AbstractCegarLoop]: Abstraction has 84341 states and 307695 transitions. [2021-04-15 04:02:04,015 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 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) [2021-04-15 04:02:04,015 INFO L276 IsEmpty]: Start isEmpty. Operand 84341 states and 307695 transitions. [2021-04-15 04:02:04,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 04:02:04,237 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:02:04,237 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:02:04,438 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable274,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:02:04,438 INFO L428 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:02:04,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:02:04,438 INFO L82 PathProgramCache]: Analyzing trace with hash 1015756207, now seen corresponding path program 103 times [2021-04-15 04:02:04,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:02:04,439 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128590824] [2021-04-15 04:02:04,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:02:04,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:02:04,550 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:02:04,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128590824] [2021-04-15 04:02:04,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984674145] [2021-04-15 04:02:04,551 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2021-04-15 04:02:04,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:02:04,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-04-15 04:02:04,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:02:04,796 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:02:04,796 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:02:04,796 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-04-15 04:02:04,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311959319] [2021-04-15 04:02:04,796 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 04:02:04,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:02:04,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 04:02:04,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2021-04-15 04:02:04,797 INFO L87 Difference]: Start difference. First operand 84341 states and 307695 transitions. Second operand has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 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) [2021-04-15 04:02:06,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:02:06,163 INFO L93 Difference]: Finished difference Result 114953 states and 419327 transitions. [2021-04-15 04:02:06,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-04-15 04:02:06,164 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 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 25 [2021-04-15 04:02:06,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:02:06,746 INFO L225 Difference]: With dead ends: 114953 [2021-04-15 04:02:06,747 INFO L226 Difference]: Without dead ends: 114907 [2021-04-15 04:02:06,747 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 490.3ms TimeCoverageRelationStatistics Valid=155, Invalid=495, Unknown=0, NotChecked=0, Total=650 [2021-04-15 04:02:07,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114907 states. [2021-04-15 04:02:09,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114907 to 84334. [2021-04-15 04:02:09,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84334 states, 84333 states have (on average 3.648263431871272) internal successors, (307669), 84333 states have internal predecessors, (307669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:02:10,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84334 states to 84334 states and 307669 transitions. [2021-04-15 04:02:10,170 INFO L78 Accepts]: Start accepts. Automaton has 84334 states and 307669 transitions. Word has length 25 [2021-04-15 04:02:10,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:02:10,170 INFO L480 AbstractCegarLoop]: Abstraction has 84334 states and 307669 transitions. [2021-04-15 04:02:10,170 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 16 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) [2021-04-15 04:02:10,170 INFO L276 IsEmpty]: Start isEmpty. Operand 84334 states and 307669 transitions. [2021-04-15 04:02:10,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 04:02:10,318 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:02:10,318 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:02:10,518 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable277 [2021-04-15 04:02:10,518 INFO L428 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:02:10,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:02:10,519 INFO L82 PathProgramCache]: Analyzing trace with hash 777388195, now seen corresponding path program 104 times [2021-04-15 04:02:10,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:02:10,519 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145406454] [2021-04-15 04:02:10,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:02:10,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:02:10,621 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:02:10,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145406454] [2021-04-15 04:02:10,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087607488] [2021-04-15 04:02:10,621 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 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 [2021-04-15 04:02:10,639 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 04:02:10,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:02:10,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-04-15 04:02:10,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:02:10,756 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:02:10,756 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:02:10,756 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-04-15 04:02:10,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557915221] [2021-04-15 04:02:10,756 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 04:02:10,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:02:10,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 04:02:10,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-04-15 04:02:10,756 INFO L87 Difference]: Start difference. First operand 84334 states and 307669 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 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) [2021-04-15 04:02:12,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:02:12,064 INFO L93 Difference]: Finished difference Result 84664 states and 308472 transitions. [2021-04-15 04:02:12,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-04-15 04:02:12,064 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 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 25 [2021-04-15 04:02:12,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:02:12,415 INFO L225 Difference]: With dead ends: 84664 [2021-04-15 04:02:12,415 INFO L226 Difference]: Without dead ends: 84573 [2021-04-15 04:02:12,415 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 197.9ms TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-04-15 04:02:12,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84573 states. [2021-04-15 04:02:14,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84573 to 84318. [2021-04-15 04:02:14,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84318 states, 84317 states have (on average 3.6468565058054723) internal successors, (307492), 84317 states have internal predecessors, (307492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:02:14,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84318 states to 84318 states and 307492 transitions. [2021-04-15 04:02:14,754 INFO L78 Accepts]: Start accepts. Automaton has 84318 states and 307492 transitions. Word has length 25 [2021-04-15 04:02:14,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:02:14,754 INFO L480 AbstractCegarLoop]: Abstraction has 84318 states and 307492 transitions. [2021-04-15 04:02:14,754 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 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) [2021-04-15 04:02:14,754 INFO L276 IsEmpty]: Start isEmpty. Operand 84318 states and 307492 transitions. [2021-04-15 04:02:14,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 04:02:14,888 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:02:14,888 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:02:15,088 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable283,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:02:15,088 INFO L428 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:02:15,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:02:15,089 INFO L82 PathProgramCache]: Analyzing trace with hash 341477219, now seen corresponding path program 105 times [2021-04-15 04:02:15,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:02:15,089 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582565682] [2021-04-15 04:02:15,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:02:15,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:02:15,213 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:02:15,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582565682] [2021-04-15 04:02:15,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053889023] [2021-04-15 04:02:15,214 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2021-04-15 04:02:15,236 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-04-15 04:02:15,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:02:15,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-04-15 04:02:15,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:02:15,406 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:02:15,406 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:02:15,406 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-04-15 04:02:15,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432384312] [2021-04-15 04:02:15,406 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 04:02:15,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:02:15,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 04:02:15,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-04-15 04:02:15,407 INFO L87 Difference]: Start difference. First operand 84318 states and 307492 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 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) [2021-04-15 04:02:16,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:02:16,897 INFO L93 Difference]: Finished difference Result 102032 states and 370656 transitions. [2021-04-15 04:02:16,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-04-15 04:02:16,897 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 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 25 [2021-04-15 04:02:16,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:02:17,275 INFO L225 Difference]: With dead ends: 102032 [2021-04-15 04:02:17,276 INFO L226 Difference]: Without dead ends: 102003 [2021-04-15 04:02:17,276 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 5 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 450.8ms TimeCoverageRelationStatistics Valid=126, Invalid=426, Unknown=0, NotChecked=0, Total=552 [2021-04-15 04:02:17,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102003 states. [2021-04-15 04:02:19,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102003 to 84337. [2021-04-15 04:02:19,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84337 states, 84336 states have (on average 3.646876778599886) internal successors, (307563), 84336 states have internal predecessors, (307563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:02:20,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84337 states to 84337 states and 307563 transitions. [2021-04-15 04:02:20,208 INFO L78 Accepts]: Start accepts. Automaton has 84337 states and 307563 transitions. Word has length 25 [2021-04-15 04:02:20,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:02:20,208 INFO L480 AbstractCegarLoop]: Abstraction has 84337 states and 307563 transitions. [2021-04-15 04:02:20,209 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 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) [2021-04-15 04:02:20,209 INFO L276 IsEmpty]: Start isEmpty. Operand 84337 states and 307563 transitions. [2021-04-15 04:02:20,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 04:02:20,391 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:02:20,391 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:02:20,591 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable284,152 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:02:20,591 INFO L428 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:02:20,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:02:20,592 INFO L82 PathProgramCache]: Analyzing trace with hash -457562785, now seen corresponding path program 106 times [2021-04-15 04:02:20,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:02:20,592 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082139719] [2021-04-15 04:02:20,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:02:20,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:02:20,688 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:02:20,688 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082139719] [2021-04-15 04:02:20,688 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101028071] [2021-04-15 04:02:20,688 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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 [2021-04-15 04:02:20,707 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 04:02:20,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:02:20,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-04-15 04:02:20,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:02:20,866 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:02:20,866 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:02:20,866 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-04-15 04:02:20,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510785112] [2021-04-15 04:02:20,867 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-04-15 04:02:20,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:02:20,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-04-15 04:02:20,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-04-15 04:02:20,867 INFO L87 Difference]: Start difference. First operand 84337 states and 307563 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 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) [2021-04-15 04:02:21,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:02:21,941 INFO L93 Difference]: Finished difference Result 113885 states and 415278 transitions. [2021-04-15 04:02:21,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-04-15 04:02:21,942 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 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 25 [2021-04-15 04:02:21,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:02:22,353 INFO L225 Difference]: With dead ends: 113885 [2021-04-15 04:02:22,354 INFO L226 Difference]: Without dead ends: 113839 [2021-04-15 04:02:22,354 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 402.2ms TimeCoverageRelationStatistics Valid=164, Invalid=436, Unknown=0, NotChecked=0, Total=600 [2021-04-15 04:02:23,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113839 states. [2021-04-15 04:02:24,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113839 to 84337. [2021-04-15 04:02:24,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84337 states, 84336 states have (on average 3.6470902105862266) internal successors, (307581), 84336 states have internal predecessors, (307581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:02:25,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84337 states to 84337 states and 307581 transitions. [2021-04-15 04:02:25,207 INFO L78 Accepts]: Start accepts. Automaton has 84337 states and 307581 transitions. Word has length 25 [2021-04-15 04:02:25,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:02:25,207 INFO L480 AbstractCegarLoop]: Abstraction has 84337 states and 307581 transitions. [2021-04-15 04:02:25,207 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 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) [2021-04-15 04:02:25,208 INFO L276 IsEmpty]: Start isEmpty. Operand 84337 states and 307581 transitions. [2021-04-15 04:02:25,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 04:02:25,368 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:02:25,368 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:02:25,568 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable288 [2021-04-15 04:02:25,569 INFO L428 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:02:25,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:02:25,569 INFO L82 PathProgramCache]: Analyzing trace with hash 2113651299, now seen corresponding path program 107 times [2021-04-15 04:02:25,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:02:25,569 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148768278] [2021-04-15 04:02:25,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:02:25,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:02:25,670 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:02:25,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148768278] [2021-04-15 04:02:25,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138508312] [2021-04-15 04:02:25,671 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_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 [2021-04-15 04:02:25,690 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-04-15 04:02:25,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:02:25,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-04-15 04:02:25,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:02:25,863 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:02:25,863 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:02:25,864 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-04-15 04:02:25,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707042796] [2021-04-15 04:02:25,864 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-04-15 04:02:25,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:02:25,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-04-15 04:02:25,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-04-15 04:02:25,864 INFO L87 Difference]: Start difference. First operand 84337 states and 307581 transitions. Second operand has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 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) [2021-04-15 04:02:27,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:02:27,512 INFO L93 Difference]: Finished difference Result 103512 states and 375618 transitions. [2021-04-15 04:02:27,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 04:02:27,513 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 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 25 [2021-04-15 04:02:27,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:02:27,904 INFO L225 Difference]: With dead ends: 103512 [2021-04-15 04:02:27,904 INFO L226 Difference]: Without dead ends: 103483 [2021-04-15 04:02:27,904 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 370.9ms TimeCoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2021-04-15 04:02:28,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103483 states. [2021-04-15 04:02:29,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103483 to 84341. [2021-04-15 04:02:29,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84341 states, 84340 states have (on average 3.6470358074460516) internal successors, (307591), 84340 states have internal predecessors, (307591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:02:30,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84341 states to 84341 states and 307591 transitions. [2021-04-15 04:02:30,309 INFO L78 Accepts]: Start accepts. Automaton has 84341 states and 307591 transitions. Word has length 25 [2021-04-15 04:02:30,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:02:30,309 INFO L480 AbstractCegarLoop]: Abstraction has 84341 states and 307591 transitions. [2021-04-15 04:02:30,309 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.411764705882353) internal successors, (41), 16 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) [2021-04-15 04:02:30,309 INFO L276 IsEmpty]: Start isEmpty. Operand 84341 states and 307591 transitions. [2021-04-15 04:02:31,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 04:02:31,006 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:02:31,006 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:02:31,206 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable295,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:02:31,207 INFO L428 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:02:31,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:02:31,207 INFO L82 PathProgramCache]: Analyzing trace with hash 1314611295, now seen corresponding path program 108 times [2021-04-15 04:02:31,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:02:31,207 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031654421] [2021-04-15 04:02:31,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:02:31,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:02:31,331 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:02:31,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031654421] [2021-04-15 04:02:31,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206779719] [2021-04-15 04:02:31,332 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 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 [2021-04-15 04:02:31,356 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-04-15 04:02:31,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:02:31,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-04-15 04:02:31,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:02:31,568 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:02:31,568 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:02:31,568 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-04-15 04:02:31,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782321838] [2021-04-15 04:02:31,568 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 04:02:31,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:02:31,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 04:02:31,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2021-04-15 04:02:31,569 INFO L87 Difference]: Start difference. First operand 84341 states and 307591 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 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) [2021-04-15 04:02:32,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:02:32,678 INFO L93 Difference]: Finished difference Result 115784 states and 421753 transitions. [2021-04-15 04:02:32,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 04:02:32,679 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 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 25 [2021-04-15 04:02:32,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:02:33,100 INFO L225 Difference]: With dead ends: 115784 [2021-04-15 04:02:33,100 INFO L226 Difference]: Without dead ends: 115728 [2021-04-15 04:02:33,100 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 444.9ms TimeCoverageRelationStatistics Valid=177, Invalid=525, Unknown=0, NotChecked=0, Total=702 [2021-04-15 04:02:33,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115728 states. [2021-04-15 04:02:35,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115728 to 84347. [2021-04-15 04:02:35,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84347 states, 84346 states have (on average 3.6472980342873402) internal successors, (307635), 84346 states have internal predecessors, (307635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:02:36,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84347 states to 84347 states and 307635 transitions. [2021-04-15 04:02:36,035 INFO L78 Accepts]: Start accepts. Automaton has 84347 states and 307635 transitions. Word has length 25 [2021-04-15 04:02:36,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:02:36,035 INFO L480 AbstractCegarLoop]: Abstraction has 84347 states and 307635 transitions. [2021-04-15 04:02:36,035 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 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) [2021-04-15 04:02:36,035 INFO L276 IsEmpty]: Start isEmpty. Operand 84347 states and 307635 transitions. [2021-04-15 04:02:36,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 04:02:36,198 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:02:36,198 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:02:36,399 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable300 [2021-04-15 04:02:36,399 INFO L428 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:02:36,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:02:36,399 INFO L82 PathProgramCache]: Analyzing trace with hash 664777499, now seen corresponding path program 109 times [2021-04-15 04:02:36,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:02:36,400 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390928437] [2021-04-15 04:02:36,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:02:36,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:02:36,504 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:02:36,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390928437] [2021-04-15 04:02:36,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [959749787] [2021-04-15 04:02:36,504 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2021-04-15 04:02:36,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:02:36,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-04-15 04:02:36,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:02:36,658 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 04:02:36,659 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:02:36,659 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-04-15 04:02:36,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955193626] [2021-04-15 04:02:36,659 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 04:02:36,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:02:36,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 04:02:36,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-04-15 04:02:36,660 INFO L87 Difference]: Start difference. First operand 84347 states and 307635 transitions. Second operand has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 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) [2021-04-15 04:02:38,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:02:38,282 INFO L93 Difference]: Finished difference Result 103478 states and 375677 transitions. [2021-04-15 04:02:38,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 04:02:38,283 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 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 25 [2021-04-15 04:02:38,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:02:39,009 INFO L225 Difference]: With dead ends: 103478 [2021-04-15 04:02:39,009 INFO L226 Difference]: Without dead ends: 103346 [2021-04-15 04:02:39,009 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 237.0ms TimeCoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2021-04-15 04:02:39,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103346 states. [2021-04-15 04:02:40,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103346 to 85058. [2021-04-15 04:02:40,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85058 states, 85057 states have (on average 3.644791140059019) internal successors, (310015), 85057 states have internal predecessors, (310015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:02:41,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85058 states to 85058 states and 310015 transitions. [2021-04-15 04:02:41,220 INFO L78 Accepts]: Start accepts. Automaton has 85058 states and 310015 transitions. Word has length 25 [2021-04-15 04:02:41,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:02:41,220 INFO L480 AbstractCegarLoop]: Abstraction has 85058 states and 310015 transitions. [2021-04-15 04:02:41,220 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 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) [2021-04-15 04:02:41,220 INFO L276 IsEmpty]: Start isEmpty. Operand 85058 states and 310015 transitions. [2021-04-15 04:02:41,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 04:02:41,367 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:02:41,367 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:02:41,567 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable308,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:02:41,568 INFO L428 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:02:41,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:02:41,568 INFO L82 PathProgramCache]: Analyzing trace with hash -134262505, now seen corresponding path program 110 times [2021-04-15 04:02:41,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:02:41,568 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237967226] [2021-04-15 04:02:41,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:02:41,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:02:41,679 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:02:41,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237967226] [2021-04-15 04:02:41,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572020872] [2021-04-15 04:02:41,679 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-04-15 04:02:41,722 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 04:02:41,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:02:41,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-04-15 04:02:41,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:02:41,849 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 04:02:41,849 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:02:41,849 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-04-15 04:02:41,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668996186] [2021-04-15 04:02:41,849 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-04-15 04:02:41,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:02:41,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-04-15 04:02:41,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-04-15 04:02:41,850 INFO L87 Difference]: Start difference. First operand 85058 states and 310015 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 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) [2021-04-15 04:02:43,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:02:43,559 INFO L93 Difference]: Finished difference Result 116260 states and 423908 transitions. [2021-04-15 04:02:43,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-04-15 04:02:43,559 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 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 25 [2021-04-15 04:02:43,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:02:43,976 INFO L225 Difference]: With dead ends: 116260 [2021-04-15 04:02:43,976 INFO L226 Difference]: Without dead ends: 116214 [2021-04-15 04:02:43,976 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 380.2ms TimeCoverageRelationStatistics Valid=148, Invalid=404, Unknown=0, NotChecked=0, Total=552 [2021-04-15 04:02:44,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116214 states. [2021-04-15 04:02:46,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116214 to 85045. [2021-04-15 04:02:46,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85045 states, 85044 states have (on average 3.644689807628992) internal successors, (309959), 85044 states have internal predecessors, (309959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:02:47,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85045 states to 85045 states and 309959 transitions. [2021-04-15 04:02:47,306 INFO L78 Accepts]: Start accepts. Automaton has 85045 states and 309959 transitions. Word has length 25 [2021-04-15 04:02:47,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:02:47,306 INFO L480 AbstractCegarLoop]: Abstraction has 85045 states and 309959 transitions. [2021-04-15 04:02:47,306 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 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) [2021-04-15 04:02:47,306 INFO L276 IsEmpty]: Start isEmpty. Operand 85045 states and 309959 transitions. [2021-04-15 04:02:47,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 04:02:47,454 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:02:47,454 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:02:47,654 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable311 [2021-04-15 04:02:47,655 INFO L428 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:02:47,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:02:47,655 INFO L82 PathProgramCache]: Analyzing trace with hash -394386371, now seen corresponding path program 111 times [2021-04-15 04:02:47,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:02:47,655 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84400517] [2021-04-15 04:02:47,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:02:47,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:02:47,751 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:02:47,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84400517] [2021-04-15 04:02:47,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851615511] [2021-04-15 04:02:47,751 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2021-04-15 04:02:47,770 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-04-15 04:02:47,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:02:47,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-04-15 04:02:47,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:02:47,863 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 04:02:47,863 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:02:47,863 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 12 [2021-04-15 04:02:47,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307703683] [2021-04-15 04:02:47,863 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 04:02:47,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:02:47,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 04:02:47,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-04-15 04:02:47,864 INFO L87 Difference]: Start difference. First operand 85045 states and 309959 transitions. Second operand has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 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) [2021-04-15 04:02:48,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:02:48,498 INFO L93 Difference]: Finished difference Result 85264 states and 310461 transitions. [2021-04-15 04:02:48,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-04-15 04:02:48,499 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 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 25 [2021-04-15 04:02:48,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:02:48,771 INFO L225 Difference]: With dead ends: 85264 [2021-04-15 04:02:48,771 INFO L226 Difference]: Without dead ends: 85227 [2021-04-15 04:02:48,771 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 153.3ms TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-04-15 04:02:48,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85227 states. [2021-04-15 04:02:51,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85227 to 84878. [2021-04-15 04:02:51,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84878 states, 84877 states have (on average 3.6458051062125194) internal successors, (309445), 84877 states have internal predecessors, (309445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:02:51,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84878 states to 84878 states and 309445 transitions. [2021-04-15 04:02:51,558 INFO L78 Accepts]: Start accepts. Automaton has 84878 states and 309445 transitions. Word has length 25 [2021-04-15 04:02:51,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:02:51,558 INFO L480 AbstractCegarLoop]: Abstraction has 84878 states and 309445 transitions. [2021-04-15 04:02:51,558 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 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) [2021-04-15 04:02:51,559 INFO L276 IsEmpty]: Start isEmpty. Operand 84878 states and 309445 transitions. [2021-04-15 04:02:51,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 04:02:51,715 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:02:51,715 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:02:51,915 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable317,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:02:51,916 INFO L428 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:02:51,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:02:51,916 INFO L82 PathProgramCache]: Analyzing trace with hash -372630517, now seen corresponding path program 112 times [2021-04-15 04:02:51,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:02:51,916 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175791999] [2021-04-15 04:02:51,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:02:51,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:02:52,019 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:02:52,019 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175791999] [2021-04-15 04:02:52,019 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528413735] [2021-04-15 04:02:52,019 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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 [2021-04-15 04:02:52,046 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 04:02:52,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:02:52,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-04-15 04:02:52,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:02:52,140 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-04-15 04:02:52,140 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:02:52,140 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 12 [2021-04-15 04:02:52,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158649823] [2021-04-15 04:02:52,141 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 04:02:52,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:02:52,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 04:02:52,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-04-15 04:02:52,141 INFO L87 Difference]: Start difference. First operand 84878 states and 309445 transitions. Second operand has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 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) [2021-04-15 04:02:52,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:02:52,766 INFO L93 Difference]: Finished difference Result 84981 states and 309645 transitions. [2021-04-15 04:02:52,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-04-15 04:02:52,767 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 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 25 [2021-04-15 04:02:52,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:02:53,046 INFO L225 Difference]: With dead ends: 84981 [2021-04-15 04:02:53,047 INFO L226 Difference]: Without dead ends: 84886 [2021-04-15 04:02:53,047 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 166.2ms TimeCoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-04-15 04:02:53,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84886 states. [2021-04-15 04:02:55,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84886 to 84819. [2021-04-15 04:02:55,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84819 states, 84818 states have (on average 3.6438609729066944) internal successors, (309065), 84818 states have internal predecessors, (309065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:02:55,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84819 states to 84819 states and 309065 transitions. [2021-04-15 04:02:55,901 INFO L78 Accepts]: Start accepts. Automaton has 84819 states and 309065 transitions. Word has length 25 [2021-04-15 04:02:55,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:02:55,901 INFO L480 AbstractCegarLoop]: Abstraction has 84819 states and 309065 transitions. [2021-04-15 04:02:55,901 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 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) [2021-04-15 04:02:55,902 INFO L276 IsEmpty]: Start isEmpty. Operand 84819 states and 309065 transitions. [2021-04-15 04:02:56,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 04:02:56,052 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:02:56,052 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:02:56,252 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable318 [2021-04-15 04:02:56,252 INFO L428 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:02:56,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:02:56,253 INFO L82 PathProgramCache]: Analyzing trace with hash 445651607, now seen corresponding path program 113 times [2021-04-15 04:02:56,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:02:56,253 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443746294] [2021-04-15 04:02:56,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:02:56,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:02:56,350 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:02:56,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443746294] [2021-04-15 04:02:56,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410574666] [2021-04-15 04:02:56,351 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 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) [2021-04-15 04:02:56,381 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-04-15 04:02:56,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:02:56,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-04-15 04:02:56,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:02:56,557 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:02:56,557 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:02:56,557 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-04-15 04:02:56,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828590268] [2021-04-15 04:02:56,557 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-04-15 04:02:56,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:02:56,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-04-15 04:02:56,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2021-04-15 04:02:56,558 INFO L87 Difference]: Start difference. First operand 84819 states and 309065 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 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) [2021-04-15 04:02:58,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:02:58,158 INFO L93 Difference]: Finished difference Result 98781 states and 357791 transitions. [2021-04-15 04:02:58,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-04-15 04:02:58,159 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 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 25 [2021-04-15 04:02:58,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:02:58,507 INFO L225 Difference]: With dead ends: 98781 [2021-04-15 04:02:58,507 INFO L226 Difference]: Without dead ends: 98709 [2021-04-15 04:02:58,507 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 334.1ms TimeCoverageRelationStatistics Valid=145, Invalid=557, Unknown=0, NotChecked=0, Total=702 [2021-04-15 04:02:58,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98709 states. [2021-04-15 04:03:00,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98709 to 86023. [2021-04-15 04:03:00,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86023 states, 86022 states have (on average 3.6436492990165306) internal successors, (313434), 86022 states have internal predecessors, (313434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:03:00,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86023 states to 86023 states and 313434 transitions. [2021-04-15 04:03:00,973 INFO L78 Accepts]: Start accepts. Automaton has 86023 states and 313434 transitions. Word has length 25 [2021-04-15 04:03:00,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:03:00,973 INFO L480 AbstractCegarLoop]: Abstraction has 86023 states and 313434 transitions. [2021-04-15 04:03:00,973 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 17 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) [2021-04-15 04:03:00,973 INFO L276 IsEmpty]: Start isEmpty. Operand 86023 states and 313434 transitions. [2021-04-15 04:03:01,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 04:03:01,127 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:03:01,127 INFO L551 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:03:01,327 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable319,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:03:01,328 INFO L428 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:03:01,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:03:01,328 INFO L82 PathProgramCache]: Analyzing trace with hash -743631491, now seen corresponding path program 114 times [2021-04-15 04:03:01,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:03:01,328 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83548672] [2021-04-15 04:03:01,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:03:01,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:03:01,401 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:03:01,401 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83548672] [2021-04-15 04:03:01,401 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047159270] [2021-04-15 04:03:01,401 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 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 [2021-04-15 04:03:01,419 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-04-15 04:03:01,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:03:01,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 21 conjunts are in the unsatisfiable core [2021-04-15 04:03:01,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:03:01,522 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:03:01,522 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:03:01,522 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-04-15 04:03:01,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880497051] [2021-04-15 04:03:01,522 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-04-15 04:03:01,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:03:01,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-04-15 04:03:01,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-04-15 04:03:01,523 INFO L87 Difference]: Start difference. First operand 86023 states and 313434 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 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) [2021-04-15 04:03:02,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:03:02,761 INFO L93 Difference]: Finished difference Result 86643 states and 315124 transitions. [2021-04-15 04:03:02,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-04-15 04:03:02,762 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 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 25 [2021-04-15 04:03:02,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:03:03,065 INFO L225 Difference]: With dead ends: 86643 [2021-04-15 04:03:03,065 INFO L226 Difference]: Without dead ends: 86582 [2021-04-15 04:03:03,065 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 138.5ms TimeCoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2021-04-15 04:03:03,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86582 states. [2021-04-15 04:03:04,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86582 to 86027. [2021-04-15 04:03:05,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86027 states, 86026 states have (on average 3.642561551158952) internal successors, (313355), 86026 states have internal predecessors, (313355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:03:05,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86027 states to 86027 states and 313355 transitions. [2021-04-15 04:03:05,513 INFO L78 Accepts]: Start accepts. Automaton has 86027 states and 313355 transitions. Word has length 25 [2021-04-15 04:03:05,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:03:05,513 INFO L480 AbstractCegarLoop]: Abstraction has 86027 states and 313355 transitions. [2021-04-15 04:03:05,513 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 13 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) [2021-04-15 04:03:05,513 INFO L276 IsEmpty]: Start isEmpty. Operand 86027 states and 313355 transitions. [2021-04-15 04:03:06,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 04:03:06,272 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:03:06,272 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:03:06,472 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable324 [2021-04-15 04:03:06,473 INFO L428 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:03:06,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:03:06,473 INFO L82 PathProgramCache]: Analyzing trace with hash -1565279795, now seen corresponding path program 25 times [2021-04-15 04:03:06,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:03:06,473 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031772918] [2021-04-15 04:03:06,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:03:06,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:03:06,509 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:03:06,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031772918] [2021-04-15 04:03:06,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152478820] [2021-04-15 04:03:06,509 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2021-04-15 04:03:06,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:03:06,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 8 conjunts are in the unsatisfiable core [2021-04-15 04:03:06,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:03:06,600 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:03:06,600 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:03:06,600 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-04-15 04:03:06,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959395226] [2021-04-15 04:03:06,606 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 04:03:06,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:03:06,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 04:03:06,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-04-15 04:03:06,607 INFO L87 Difference]: Start difference. First operand 86027 states and 313355 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 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) [2021-04-15 04:03:07,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:03:07,810 INFO L93 Difference]: Finished difference Result 182542 states and 664116 transitions. [2021-04-15 04:03:07,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-04-15 04:03:07,810 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 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 25 [2021-04-15 04:03:07,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:03:08,501 INFO L225 Difference]: With dead ends: 182542 [2021-04-15 04:03:08,501 INFO L226 Difference]: Without dead ends: 182528 [2021-04-15 04:03:08,501 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 104.9ms TimeCoverageRelationStatistics Valid=99, Invalid=173, Unknown=0, NotChecked=0, Total=272 [2021-04-15 04:03:09,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182528 states. [2021-04-15 04:03:12,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182528 to 178619. [2021-04-15 04:03:13,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178619 states, 178618 states have (on average 3.650012876641772) internal successors, (651958), 178618 states have internal predecessors, (651958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:03:14,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178619 states to 178619 states and 651958 transitions. [2021-04-15 04:03:14,893 INFO L78 Accepts]: Start accepts. Automaton has 178619 states and 651958 transitions. Word has length 25 [2021-04-15 04:03:14,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:03:14,893 INFO L480 AbstractCegarLoop]: Abstraction has 178619 states and 651958 transitions. [2021-04-15 04:03:14,893 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 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) [2021-04-15 04:03:14,893 INFO L276 IsEmpty]: Start isEmpty. Operand 178619 states and 651958 transitions. [2021-04-15 04:03:15,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 04:03:15,282 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:03:15,282 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:03:15,482 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable325,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:03:15,483 INFO L428 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:03:15,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:03:15,483 INFO L82 PathProgramCache]: Analyzing trace with hash -1079475691, now seen corresponding path program 26 times [2021-04-15 04:03:15,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:03:15,483 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212860014] [2021-04-15 04:03:15,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:03:15,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:03:15,544 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:03:15,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212860014] [2021-04-15 04:03:15,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706010507] [2021-04-15 04:03:15,545 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_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 [2021-04-15 04:03:15,581 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-04-15 04:03:15,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:03:15,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 8 conjunts are in the unsatisfiable core [2021-04-15 04:03:15,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:03:15,660 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:03:15,660 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:03:15,661 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-04-15 04:03:15,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830012706] [2021-04-15 04:03:15,661 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-04-15 04:03:15,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:03:15,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-04-15 04:03:15,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-04-15 04:03:15,662 INFO L87 Difference]: Start difference. First operand 178619 states and 651958 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 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) [2021-04-15 04:03:18,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:03:18,830 INFO L93 Difference]: Finished difference Result 310278 states and 1130757 transitions. [2021-04-15 04:03:18,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-04-15 04:03:18,831 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 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 25 [2021-04-15 04:03:18,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:03:20,295 INFO L225 Difference]: With dead ends: 310278 [2021-04-15 04:03:20,296 INFO L226 Difference]: Without dead ends: 310278 [2021-04-15 04:03:20,296 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 127.4ms TimeCoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2021-04-15 04:03:20,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310278 states. [2021-04-15 04:03:28,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310278 to 307687. [2021-04-15 04:03:28,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307687 states, 307686 states have (on average 3.6506373380654304) internal successors, (1123250), 307686 states have internal predecessors, (1123250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:03:31,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307687 states to 307687 states and 1123250 transitions. [2021-04-15 04:03:31,447 INFO L78 Accepts]: Start accepts. Automaton has 307687 states and 1123250 transitions. Word has length 25 [2021-04-15 04:03:31,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:03:31,447 INFO L480 AbstractCegarLoop]: Abstraction has 307687 states and 1123250 transitions. [2021-04-15 04:03:31,447 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 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) [2021-04-15 04:03:31,447 INFO L276 IsEmpty]: Start isEmpty. Operand 307687 states and 1123250 transitions. [2021-04-15 04:03:31,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 04:03:31,913 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:03:31,913 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:03:32,113 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable326 [2021-04-15 04:03:32,114 INFO L428 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:03:32,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:03:32,114 INFO L82 PathProgramCache]: Analyzing trace with hash -373421423, now seen corresponding path program 27 times [2021-04-15 04:03:32,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:03:32,114 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224750908] [2021-04-15 04:03:32,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:03:32,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:03:32,153 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:03:32,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224750908] [2021-04-15 04:03:32,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565116222] [2021-04-15 04:03:32,154 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2021-04-15 04:03:32,172 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-04-15 04:03:32,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:03:32,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 8 conjunts are in the unsatisfiable core [2021-04-15 04:03:32,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:03:32,230 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:03:32,230 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:03:32,230 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-04-15 04:03:32,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029233856] [2021-04-15 04:03:32,231 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 04:03:32,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:03:32,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 04:03:32,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-04-15 04:03:32,231 INFO L87 Difference]: Start difference. First operand 307687 states and 1123250 transitions. Second operand has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 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) [2021-04-15 04:03:35,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:03:35,341 INFO L93 Difference]: Finished difference Result 315780 states and 1151615 transitions. [2021-04-15 04:03:35,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-04-15 04:03:35,342 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 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 25 [2021-04-15 04:03:35,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:03:36,806 INFO L225 Difference]: With dead ends: 315780 [2021-04-15 04:03:36,807 INFO L226 Difference]: Without dead ends: 315780 [2021-04-15 04:03:36,807 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 88.7ms TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-04-15 04:03:38,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315780 states. [2021-04-15 04:03:45,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315780 to 307787. [2021-04-15 04:03:45,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307787 states, 307786 states have (on average 3.6506046408868498) internal successors, (1123605), 307786 states have internal predecessors, (1123605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:03:48,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307787 states to 307787 states and 1123605 transitions. [2021-04-15 04:03:48,300 INFO L78 Accepts]: Start accepts. Automaton has 307787 states and 1123605 transitions. Word has length 25 [2021-04-15 04:03:48,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:03:48,301 INFO L480 AbstractCegarLoop]: Abstraction has 307787 states and 1123605 transitions. [2021-04-15 04:03:48,301 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.090909090909091) internal successors, (34), 10 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) [2021-04-15 04:03:48,301 INFO L276 IsEmpty]: Start isEmpty. Operand 307787 states and 1123605 transitions. [2021-04-15 04:03:48,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 04:03:48,703 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:03:48,703 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:03:48,904 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable327 [2021-04-15 04:03:48,904 INFO L428 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:03:48,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:03:48,905 INFO L82 PathProgramCache]: Analyzing trace with hash 1675135705, now seen corresponding path program 28 times [2021-04-15 04:03:48,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:03:48,905 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14026179] [2021-04-15 04:03:48,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:03:48,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:03:48,960 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:03:48,960 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14026179] [2021-04-15 04:03:48,960 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103115636] [2021-04-15 04:03:48,960 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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 [2021-04-15 04:03:48,978 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-04-15 04:03:48,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:03:48,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 8 conjunts are in the unsatisfiable core [2021-04-15 04:03:48,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:03:49,039 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:03:49,039 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:03:49,039 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-04-15 04:03:49,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158011402] [2021-04-15 04:03:49,040 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 04:03:49,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:03:49,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 04:03:49,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-04-15 04:03:49,040 INFO L87 Difference]: Start difference. First operand 307787 states and 1123605 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 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) [2021-04-15 04:03:55,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:03:55,028 INFO L93 Difference]: Finished difference Result 404695 states and 1471539 transitions. [2021-04-15 04:03:55,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-04-15 04:03:55,029 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 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 25 [2021-04-15 04:03:55,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:03:57,312 INFO L225 Difference]: With dead ends: 404695 [2021-04-15 04:03:57,312 INFO L226 Difference]: Without dead ends: 404695 [2021-04-15 04:03:57,313 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 78.4ms TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-04-15 04:03:57,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404695 states. [2021-04-15 04:04:06,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404695 to 328064. [2021-04-15 04:04:06,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328064 states, 328063 states have (on average 3.650512249171653) internal successors, (1197598), 328063 states have internal predecessors, (1197598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:04:09,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328064 states to 328064 states and 1197598 transitions. [2021-04-15 04:04:09,994 INFO L78 Accepts]: Start accepts. Automaton has 328064 states and 1197598 transitions. Word has length 25 [2021-04-15 04:04:09,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:04:09,994 INFO L480 AbstractCegarLoop]: Abstraction has 328064 states and 1197598 transitions. [2021-04-15 04:04:09,995 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 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) [2021-04-15 04:04:09,995 INFO L276 IsEmpty]: Start isEmpty. Operand 328064 states and 1197598 transitions. [2021-04-15 04:04:10,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 04:04:10,475 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:04:10,475 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:04:10,675 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable328,165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:04:10,675 INFO L428 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:04:10,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:04:10,676 INFO L82 PathProgramCache]: Analyzing trace with hash 910634069, now seen corresponding path program 29 times [2021-04-15 04:04:10,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:04:10,676 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173044073] [2021-04-15 04:04:10,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:04:10,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:04:10,732 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:04:10,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173044073] [2021-04-15 04:04:10,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068067808] [2021-04-15 04:04:10,732 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 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 [2021-04-15 04:04:10,751 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-04-15 04:04:10,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:04:10,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 8 conjunts are in the unsatisfiable core [2021-04-15 04:04:10,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:04:10,827 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:04:10,827 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:04:10,827 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-04-15 04:04:10,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309609661] [2021-04-15 04:04:10,827 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 04:04:10,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:04:10,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 04:04:10,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-04-15 04:04:10,828 INFO L87 Difference]: Start difference. First operand 328064 states and 1197598 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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) [2021-04-15 04:04:18,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:04:18,340 INFO L93 Difference]: Finished difference Result 638168 states and 2324223 transitions. [2021-04-15 04:04:18,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 04:04:18,341 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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 25 [2021-04-15 04:04:18,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:04:21,761 INFO L225 Difference]: With dead ends: 638168 [2021-04-15 04:04:21,762 INFO L226 Difference]: Without dead ends: 638168 [2021-04-15 04:04:21,762 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 131.3ms TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2021-04-15 04:04:23,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638168 states. [2021-04-15 04:04:40,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638168 to 633065. [2021-04-15 04:04:41,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 633065 states, 633064 states have (on average 3.641525975256846) internal successors, (2305319), 633064 states have internal predecessors, (2305319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:04:47,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 633065 states to 633065 states and 2305319 transitions. [2021-04-15 04:04:47,995 INFO L78 Accepts]: Start accepts. Automaton has 633065 states and 2305319 transitions. Word has length 25 [2021-04-15 04:04:47,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:04:47,996 INFO L480 AbstractCegarLoop]: Abstraction has 633065 states and 2305319 transitions. [2021-04-15 04:04:47,996 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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) [2021-04-15 04:04:47,996 INFO L276 IsEmpty]: Start isEmpty. Operand 633065 states and 2305319 transitions. [2021-04-15 04:04:48,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 04:04:48,786 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:04:48,786 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:04:48,986 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable329,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:04:48,987 INFO L428 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:04:48,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:04:48,987 INFO L82 PathProgramCache]: Analyzing trace with hash 1396438173, now seen corresponding path program 30 times [2021-04-15 04:04:48,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:04:48,987 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882270997] [2021-04-15 04:04:48,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:04:48,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:04:49,038 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:04:49,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882270997] [2021-04-15 04:04:49,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608943251] [2021-04-15 04:04:49,039 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 [2021-04-15 04:04:49,062 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-04-15 04:04:49,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-04-15 04:04:49,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 8 conjunts are in the unsatisfiable core [2021-04-15 04:04:49,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:04:49,137 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:04:49,137 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:04:49,138 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-04-15 04:04:49,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413600506] [2021-04-15 04:04:49,138 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-04-15 04:04:49,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:04:49,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-04-15 04:04:49,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-04-15 04:04:49,142 INFO L87 Difference]: Start difference. First operand 633065 states and 2305319 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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) [2021-04-15 04:04:58,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:04:58,266 INFO L93 Difference]: Finished difference Result 745537 states and 2707389 transitions. [2021-04-15 04:04:58,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-04-15 04:04:58,267 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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 25 [2021-04-15 04:04:58,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:05:05,995 INFO L225 Difference]: With dead ends: 745537 [2021-04-15 04:05:05,995 INFO L226 Difference]: Without dead ends: 745537 [2021-04-15 04:05:05,995 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 136.8ms TimeCoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-04-15 04:05:08,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 745537 states. [2021-04-15 04:05:29,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 745537 to 684275. [2021-04-15 04:05:31,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 684275 states, 684274 states have (on average 3.63622320883155) internal successors, (2488173), 684274 states have internal predecessors, (2488173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-04-15 04:05:38,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 684275 states to 684275 states and 2488173 transitions. [2021-04-15 04:05:38,840 INFO L78 Accepts]: Start accepts. Automaton has 684275 states and 2488173 transitions. Word has length 25 [2021-04-15 04:05:38,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-04-15 04:05:38,840 INFO L480 AbstractCegarLoop]: Abstraction has 684275 states and 2488173 transitions. [2021-04-15 04:05:38,840 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 11 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) [2021-04-15 04:05:38,841 INFO L276 IsEmpty]: Start isEmpty. Operand 684275 states and 2488173 transitions. [2021-04-15 04:05:39,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-04-15 04:05:39,723 INFO L543 BasicCegarLoop]: Found error trace [2021-04-15 04:05:39,723 INFO L551 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-04-15 04:05:39,923 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable330,167 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:05:39,924 INFO L428 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-04-15 04:05:39,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-04-15 04:05:39,924 INFO L82 PathProgramCache]: Analyzing trace with hash 759971319, now seen corresponding path program 31 times [2021-04-15 04:05:39,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-04-15 04:05:39,924 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130856460] [2021-04-15 04:05:39,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-04-15 04:05:39,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:05:39,975 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:05:39,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130856460] [2021-04-15 04:05:39,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356173244] [2021-04-15 04:05:39,975 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 [2021-04-15 04:05:39,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-04-15 04:05:39,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 8 conjunts are in the unsatisfiable core [2021-04-15 04:05:39,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-04-15 04:05:40,050 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-04-15 04:05:40,051 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-04-15 04:05:40,051 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-04-15 04:05:40,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634963667] [2021-04-15 04:05:40,051 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-04-15 04:05:40,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-04-15 04:05:40,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-04-15 04:05:40,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-04-15 04:05:40,053 INFO L87 Difference]: Start difference. First operand 684275 states and 2488173 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 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) [2021-04-15 04:05:48,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-04-15 04:05:48,700 INFO L93 Difference]: Finished difference Result 688130 states and 2501311 transitions. [2021-04-15 04:05:48,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-04-15 04:05:48,701 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 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 25 [2021-04-15 04:05:48,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-04-15 04:05:53,075 INFO L225 Difference]: With dead ends: 688130 [2021-04-15 04:05:53,076 INFO L226 Difference]: Without dead ends: 688130 [2021-04-15 04:05:53,076 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 83.2ms TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 Received shutdown request... [2021-04-15 04:05:55,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 688130 states. [2021-04-15 04:05:55,312 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable331,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-04-15 04:05:55,313 WARN L545 AbstractCegarLoop]: Verification canceled [2021-04-15 04:05:55,317 WARN L224 ceAbstractionStarter]: Timeout [2021-04-15 04:05:55,317 INFO L202 PluginConnector]: Adding new model mult-equiv.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.04 04:05:55 BasicIcfg [2021-04-15 04:05:55,317 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-04-15 04:05:55,318 INFO L168 Benchmark]: Toolchain (without parser) took 659689.54 ms. Allocated memory was 255.9 MB in the beginning and 16.0 GB in the end (delta: 15.7 GB). Free memory was 236.6 MB in the beginning and 8.6 GB in the end (delta: -8.4 GB). Peak memory consumption was 7.9 GB. Max. memory is 16.0 GB. [2021-04-15 04:05:55,318 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.25 ms. Allocated memory is still 255.9 MB. Free memory was 237.7 MB in the beginning and 237.7 MB in the end (delta: 83.9 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-04-15 04:05:55,319 INFO L168 Benchmark]: Boogie Procedure Inliner took 43.25 ms. Allocated memory is still 255.9 MB. Free memory was 236.5 MB in the beginning and 235.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-04-15 04:05:55,319 INFO L168 Benchmark]: Boogie Preprocessor took 23.59 ms. Allocated memory is still 255.9 MB. Free memory was 235.0 MB in the beginning and 234.2 MB in the end (delta: 877.2 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-04-15 04:05:55,319 INFO L168 Benchmark]: RCFGBuilder took 417.73 ms. Allocated memory is still 255.9 MB. Free memory was 234.1 MB in the beginning and 236.4 MB in the end (delta: -2.3 MB). Peak memory consumption was 19.6 MB. Max. memory is 16.0 GB. [2021-04-15 04:05:55,319 INFO L168 Benchmark]: TraceAbstraction took 659198.42 ms. Allocated memory was 255.9 MB in the beginning and 16.0 GB in the end (delta: 15.7 GB). Free memory was 236.2 MB in the beginning and 8.6 GB in the end (delta: -8.4 GB). Peak memory consumption was 7.9 GB. Max. memory is 16.0 GB. [2021-04-15 04:05:55,319 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 0.25 ms. Allocated memory is still 255.9 MB. Free memory was 237.7 MB in the beginning and 237.7 MB in the end (delta: 83.9 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 43.25 ms. Allocated memory is still 255.9 MB. Free memory was 236.5 MB in the beginning and 235.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 23.59 ms. Allocated memory is still 255.9 MB. Free memory was 235.0 MB in the beginning and 234.2 MB in the end (delta: 877.2 kB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 417.73 ms. Allocated memory is still 255.9 MB. Free memory was 234.1 MB in the beginning and 236.4 MB in the end (delta: -2.3 MB). Peak memory consumption was 19.6 MB. Max. memory is 16.0 GB. * TraceAbstraction took 659198.42 ms. Allocated memory was 255.9 MB in the beginning and 16.0 GB in the end (delta: 15.7 GB). Free memory was 236.2 MB in the beginning and 8.6 GB in the end (delta: -8.4 GB). Peak memory consumption was 7.9 GB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 59]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 59). Cancelled while executing MinimizeSevpa. - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 24 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 658988.6ms, OverallIterations: 172, TraceHistogramMax: 3, EmptinessCheckTime: 20278.6ms, AutomataDifference: 214933.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 40.2ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 6633 SDtfs, 18299 SDslu, 31949 SDs, 0 SdLazy, 40717 SolverSat, 6143 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 23396.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 6026 GetRequests, 3082 SyntacticMatches, 325 SemanticMatches, 2619 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14613 ImplicationChecksByTransitivity, 37667.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=684275occurred in iteration=171, InterpolantAutomatonStates: 2556, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 350274.7ms AutomataMinimizationTime, 172 MinimizatonAttempts, 1265092 StatesRemovedByMinimization, 171 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 576.8ms SsaConstructionTime, 2364.6ms SatisfiabilityAnalysisTime, 32361.0ms InterpolantComputationTime, 7949 NumberOfCodeBlocks, 7942 NumberOfCodeBlocksAsserted, 564 NumberOfCheckSat, 7610 ConstructedInterpolants, 0 QuantifiedInterpolants, 57332 SizeOfPredicates, 271 NumberOfNonLiveVariables, 10227 ConjunctsInSsa, 2283 ConjunctsInUnsatCore, 339 InterpolantComputations, 7 PerfectInterpolantSequences, 296/2686 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