/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Separate.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/difference-det.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-29289db [2021-06-05 15:19:14,820 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 15:19:14,823 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 15:19:14,862 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 15:19:14,924 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Separate.epf [2021-06-05 15:19:14,960 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 15:19:14,960 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 15:19:14,961 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 15:19:14,961 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 15:19:14,963 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 15:19:14,963 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 15:19:14,963 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 15:19:14,963 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 15:19:14,964 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 15:19:14,964 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 15:19:14,964 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 15:19:14,965 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 15:19:14,965 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 15:19:14,965 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 15:19:14,965 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 15:19:14,965 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 15:19:14,965 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 15:19:14,965 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 15:19:14,965 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 15:19:14,966 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 15:19:14,966 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 15:19:14,966 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 15:19:14,966 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 15:19:14,966 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 15:19:14,966 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 15:19:14,966 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 15:19:14,966 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 15:19:14,966 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 15:19:14,967 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 15:19:14,967 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 15:19:14,967 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 15:19:14,967 INFO L138 SettingsManager]: * Check the insufficient thread errors last=true [2021-06-05 15:19:14,967 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 15:19:15,254 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 15:19:15,271 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 15:19:15,273 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 15:19:15,274 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 15:19:15,275 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 15:19:15,275 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/difference-det.wvr.bpl [2021-06-05 15:19:15,276 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/difference-det.wvr.bpl' [2021-06-05 15:19:15,310 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 15:19:15,312 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 15:19:15,313 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 15:19:15,313 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 15:19:15,313 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 15:19:15,325 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "difference-det.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:19:15" (1/1) ... [2021-06-05 15:19:15,332 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "difference-det.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:19:15" (1/1) ... [2021-06-05 15:19:15,339 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 15:19:15,341 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 15:19:15,341 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 15:19:15,342 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 15:19:15,348 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "difference-det.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:19:15" (1/1) ... [2021-06-05 15:19:15,349 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "difference-det.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:19:15" (1/1) ... [2021-06-05 15:19:15,349 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "difference-det.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:19:15" (1/1) ... [2021-06-05 15:19:15,350 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "difference-det.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:19:15" (1/1) ... [2021-06-05 15:19:15,354 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "difference-det.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:19:15" (1/1) ... [2021-06-05 15:19:15,356 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "difference-det.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:19:15" (1/1) ... [2021-06-05 15:19:15,357 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "difference-det.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:19:15" (1/1) ... [2021-06-05 15:19:15,358 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 15:19:15,358 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 15:19:15,358 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 15:19:15,359 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 15:19:15,360 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "difference-det.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:19:15" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 15:19:15,426 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 15:19:15,426 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 15:19:15,426 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 15:19:15,426 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 15:19:15,426 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 15:19:15,427 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 15:19:15,427 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 15:19:15,427 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 15:19:15,427 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 15:19:15,427 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-06-05 15:19:15,427 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-06-05 15:19:15,428 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-06-05 15:19:15,428 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-06-05 15:19:15,428 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-06-05 15:19:15,429 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-06-05 15:19:15,429 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-05 15:19:15,632 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 15:19:15,633 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-05 15:19:15,634 INFO L202 PluginConnector]: Adding new model difference-det.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 03:19:15 BoogieIcfgContainer [2021-06-05 15:19:15,635 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 15:19:15,636 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 15:19:15,636 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 15:19:15,638 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 15:19:15,639 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "difference-det.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:19:15" (1/2) ... [2021-06-05 15:19:15,639 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6645f554 and model type difference-det.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 03:19:15, skipping insertion in model container [2021-06-05 15:19:15,640 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "difference-det.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 03:19:15" (2/2) ... [2021-06-05 15:19:15,641 INFO L111 eAbstractionObserver]: Analyzing ICFG difference-det.wvr.bpl [2021-06-05 15:19:15,645 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 15:19:15,646 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 15:19:15,646 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 15:19:15,647 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 15:19:15,693 INFO L149 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-06-05 15:19:15,712 INFO L255 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-06-05 15:19:15,727 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 15:19:15,727 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 15:19:15,727 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 15:19:15,727 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 15:19:15,727 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 15:19:15,727 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 15:19:15,727 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 15:19:15,727 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 15:19:15,736 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 49 places, 40 transitions, 112 flow [2021-06-05 15:19:15,813 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 438 states, 436 states have (on average 3.811926605504587) internal successors, (1662), 437 states have internal predecessors, (1662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:15,819 INFO L276 IsEmpty]: Start isEmpty. Operand has 438 states, 436 states have (on average 3.811926605504587) internal successors, (1662), 437 states have internal predecessors, (1662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:15,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 15:19:15,869 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:19:15,870 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:19:15,870 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:19:15,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:19:15,875 INFO L82 PathProgramCache]: Analyzing trace with hash 1838723412, now seen corresponding path program 1 times [2021-06-05 15:19:15,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:19:15,882 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440963863] [2021-06-05 15:19:15,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:19:15,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:19:16,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:19:16,159 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:19:16,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440963863] [2021-06-05 15:19:16,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440963863] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 15:19:16,160 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 15:19:16,160 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 15:19:16,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019370974] [2021-06-05 15:19:16,165 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 15:19:16,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:19:16,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 15:19:16,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 15:19:16,185 INFO L87 Difference]: Start difference. First operand has 438 states, 436 states have (on average 3.811926605504587) internal successors, (1662), 437 states have internal predecessors, (1662), 0 states have call successors, (0), 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 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:16,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:19:16,292 INFO L93 Difference]: Finished difference Result 1268 states and 4623 transitions. [2021-06-05 15:19:16,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 15:19:16,294 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-06-05 15:19:16,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:19:16,323 INFO L225 Difference]: With dead ends: 1268 [2021-06-05 15:19:16,324 INFO L226 Difference]: Without dead ends: 1057 [2021-06-05 15:19:16,327 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 63.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 15:19:16,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1057 states. [2021-06-05 15:19:16,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1057 to 776. [2021-06-05 15:19:16,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 776 states, 775 states have (on average 3.7716129032258063) internal successors, (2923), 775 states have internal predecessors, (2923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:16,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 776 states to 776 states and 2923 transitions. [2021-06-05 15:19:16,444 INFO L78 Accepts]: Start accepts. Automaton has 776 states and 2923 transitions. Word has length 26 [2021-06-05 15:19:16,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:19:16,445 INFO L482 AbstractCegarLoop]: Abstraction has 776 states and 2923 transitions. [2021-06-05 15:19:16,445 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.5) internal successors, (26), 4 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:16,446 INFO L276 IsEmpty]: Start isEmpty. Operand 776 states and 2923 transitions. [2021-06-05 15:19:16,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 15:19:16,456 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:19:16,456 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:19:16,457 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 15:19:16,457 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:19:16,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:19:16,463 INFO L82 PathProgramCache]: Analyzing trace with hash -1812651438, now seen corresponding path program 1 times [2021-06-05 15:19:16,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:19:16,464 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137379770] [2021-06-05 15:19:16,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:19:16,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:19:16,547 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:19:16,547 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:19:16,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137379770] [2021-06-05 15:19:16,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137379770] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:19:16,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336380185] [2021-06-05 15:19:16,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:19:16,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:19:16,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 15:19:16,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:19:16,778 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:19:16,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1336380185] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:19:16,779 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:19:16,779 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2021-06-05 15:19:16,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987770281] [2021-06-05 15:19:16,780 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 15:19:16,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:19:16,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 15:19:16,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-06-05 15:19:16,781 INFO L87 Difference]: Start difference. First operand 776 states and 2923 transitions. Second operand has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:16,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:19:16,921 INFO L93 Difference]: Finished difference Result 1233 states and 4561 transitions. [2021-06-05 15:19:16,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 15:19:16,921 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-06-05 15:19:16,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:19:16,930 INFO L225 Difference]: With dead ends: 1233 [2021-06-05 15:19:16,930 INFO L226 Difference]: Without dead ends: 1233 [2021-06-05 15:19:16,931 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 125.3ms TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-06-05 15:19:16,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1233 states. [2021-06-05 15:19:16,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1233 to 868. [2021-06-05 15:19:16,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 868 states, 867 states have (on average 3.795847750865052) internal successors, (3291), 867 states have internal predecessors, (3291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:16,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 868 states to 868 states and 3291 transitions. [2021-06-05 15:19:16,967 INFO L78 Accepts]: Start accepts. Automaton has 868 states and 3291 transitions. Word has length 28 [2021-06-05 15:19:16,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:19:16,968 INFO L482 AbstractCegarLoop]: Abstraction has 868 states and 3291 transitions. [2021-06-05 15:19:16,968 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:16,968 INFO L276 IsEmpty]: Start isEmpty. Operand 868 states and 3291 transitions. [2021-06-05 15:19:16,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 15:19:16,971 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:19:16,971 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:19:17,185 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-06-05 15:19:17,185 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:19:17,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:19:17,186 INFO L82 PathProgramCache]: Analyzing trace with hash 56282868, now seen corresponding path program 1 times [2021-06-05 15:19:17,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:19:17,186 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113228374] [2021-06-05 15:19:17,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:19:17,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:19:17,243 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:19:17,244 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:19:17,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113228374] [2021-06-05 15:19:17,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113228374] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 15:19:17,244 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 15:19:17,245 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 15:19:17,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79716366] [2021-06-05 15:19:17,245 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 15:19:17,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:19:17,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 15:19:17,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-05 15:19:17,246 INFO L87 Difference]: Start difference. First operand 868 states and 3291 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:17,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:19:17,313 INFO L93 Difference]: Finished difference Result 1101 states and 3979 transitions. [2021-06-05 15:19:17,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 15:19:17,313 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 28 [2021-06-05 15:19:17,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:19:17,320 INFO L225 Difference]: With dead ends: 1101 [2021-06-05 15:19:17,321 INFO L226 Difference]: Without dead ends: 1047 [2021-06-05 15:19:17,321 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 39.3ms TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-06-05 15:19:17,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1047 states. [2021-06-05 15:19:17,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1047 to 912. [2021-06-05 15:19:17,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 912 states, 911 states have (on average 3.773874862788145) internal successors, (3438), 911 states have internal predecessors, (3438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:17,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 912 states to 912 states and 3438 transitions. [2021-06-05 15:19:17,358 INFO L78 Accepts]: Start accepts. Automaton has 912 states and 3438 transitions. Word has length 28 [2021-06-05 15:19:17,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:19:17,358 INFO L482 AbstractCegarLoop]: Abstraction has 912 states and 3438 transitions. [2021-06-05 15:19:17,358 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:17,358 INFO L276 IsEmpty]: Start isEmpty. Operand 912 states and 3438 transitions. [2021-06-05 15:19:17,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 15:19:17,362 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:19:17,362 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:19:17,362 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-05 15:19:17,362 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:19:17,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:19:17,364 INFO L82 PathProgramCache]: Analyzing trace with hash 1752946356, now seen corresponding path program 2 times [2021-06-05 15:19:17,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:19:17,365 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855533882] [2021-06-05 15:19:17,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:19:17,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:19:17,460 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:19:17,460 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:19:17,460 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855533882] [2021-06-05 15:19:17,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [855533882] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 15:19:17,464 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 15:19:17,464 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 15:19:17,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415270681] [2021-06-05 15:19:17,465 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 15:19:17,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:19:17,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 15:19:17,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-05 15:19:17,467 INFO L87 Difference]: Start difference. First operand 912 states and 3438 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:17,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:19:17,530 INFO L93 Difference]: Finished difference Result 834 states and 3134 transitions. [2021-06-05 15:19:17,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 15:19:17,530 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 28 [2021-06-05 15:19:17,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:19:17,536 INFO L225 Difference]: With dead ends: 834 [2021-06-05 15:19:17,537 INFO L226 Difference]: Without dead ends: 834 [2021-06-05 15:19:17,537 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 55.8ms TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-06-05 15:19:17,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 834 states. [2021-06-05 15:19:17,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 834 to 774. [2021-06-05 15:19:17,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 774 states, 773 states have (on average 3.8007761966364813) internal successors, (2938), 773 states have internal predecessors, (2938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:17,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 774 states to 774 states and 2938 transitions. [2021-06-05 15:19:17,562 INFO L78 Accepts]: Start accepts. Automaton has 774 states and 2938 transitions. Word has length 28 [2021-06-05 15:19:17,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:19:17,562 INFO L482 AbstractCegarLoop]: Abstraction has 774 states and 2938 transitions. [2021-06-05 15:19:17,563 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:17,563 INFO L276 IsEmpty]: Start isEmpty. Operand 774 states and 2938 transitions. [2021-06-05 15:19:17,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 15:19:17,566 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:19:17,566 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:19:17,566 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-05 15:19:17,566 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:19:17,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:19:17,567 INFO L82 PathProgramCache]: Analyzing trace with hash -1894118288, now seen corresponding path program 2 times [2021-06-05 15:19:17,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:19:17,567 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300939343] [2021-06-05 15:19:17,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:19:17,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:19:17,604 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:19:17,604 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:19:17,604 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300939343] [2021-06-05 15:19:17,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300939343] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 15:19:17,605 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 15:19:17,605 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 15:19:17,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934949068] [2021-06-05 15:19:17,605 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 15:19:17,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:19:17,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 15:19:17,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-05 15:19:17,606 INFO L87 Difference]: Start difference. First operand 774 states and 2938 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:17,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:19:17,669 INFO L93 Difference]: Finished difference Result 878 states and 3300 transitions. [2021-06-05 15:19:17,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 15:19:17,669 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 28 [2021-06-05 15:19:17,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:19:17,675 INFO L225 Difference]: With dead ends: 878 [2021-06-05 15:19:17,675 INFO L226 Difference]: Without dead ends: 838 [2021-06-05 15:19:17,675 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 37.7ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-05 15:19:17,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 838 states. [2021-06-05 15:19:17,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 838 to 726. [2021-06-05 15:19:17,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 726 states, 725 states have (on average 3.8096551724137933) internal successors, (2762), 725 states have internal predecessors, (2762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:17,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 726 states to 726 states and 2762 transitions. [2021-06-05 15:19:17,701 INFO L78 Accepts]: Start accepts. Automaton has 726 states and 2762 transitions. Word has length 28 [2021-06-05 15:19:17,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:19:17,702 INFO L482 AbstractCegarLoop]: Abstraction has 726 states and 2762 transitions. [2021-06-05 15:19:17,702 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:17,702 INFO L276 IsEmpty]: Start isEmpty. Operand 726 states and 2762 transitions. [2021-06-05 15:19:17,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:19:17,708 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:19:17,708 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:19:17,708 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-05 15:19:17,709 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:19:17,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:19:17,709 INFO L82 PathProgramCache]: Analyzing trace with hash 73332850, now seen corresponding path program 1 times [2021-06-05 15:19:17,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:19:17,709 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459727428] [2021-06-05 15:19:17,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:19:17,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:19:17,805 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:19:17,805 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:19:17,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459727428] [2021-06-05 15:19:17,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459727428] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:19:17,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372765916] [2021-06-05 15:19:17,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:19:17,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:19:17,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 15:19:17,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:19:18,021 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:19:18,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1372765916] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:19:18,021 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:19:18,021 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 8 [2021-06-05 15:19:18,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338928220] [2021-06-05 15:19:18,022 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 15:19:18,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:19:18,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 15:19:18,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-05 15:19:18,023 INFO L87 Difference]: Start difference. First operand 726 states and 2762 transitions. Second operand has 8 states, 8 states have (on average 6.75) internal successors, (54), 8 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:18,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:19:18,114 INFO L93 Difference]: Finished difference Result 3314 states and 12458 transitions. [2021-06-05 15:19:18,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 15:19:18,115 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.75) internal successors, (54), 8 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 15:19:18,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:19:18,135 INFO L225 Difference]: With dead ends: 3314 [2021-06-05 15:19:18,135 INFO L226 Difference]: Without dead ends: 3000 [2021-06-05 15:19:18,136 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 58.7ms TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-06-05 15:19:18,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3000 states. [2021-06-05 15:19:18,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3000 to 2163. [2021-06-05 15:19:18,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2163 states, 2162 states have (on average 4.01063829787234) internal successors, (8671), 2162 states have internal predecessors, (8671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:18,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2163 states to 2163 states and 8671 transitions. [2021-06-05 15:19:18,233 INFO L78 Accepts]: Start accepts. Automaton has 2163 states and 8671 transitions. Word has length 30 [2021-06-05 15:19:18,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:19:18,233 INFO L482 AbstractCegarLoop]: Abstraction has 2163 states and 8671 transitions. [2021-06-05 15:19:18,234 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.75) internal successors, (54), 8 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:18,234 INFO L276 IsEmpty]: Start isEmpty. Operand 2163 states and 8671 transitions. [2021-06-05 15:19:18,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 15:19:18,240 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:19:18,240 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:19:18,464 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:19:18,465 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:19:18,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:19:18,465 INFO L82 PathProgramCache]: Analyzing trace with hash 2051184466, now seen corresponding path program 2 times [2021-06-05 15:19:18,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:19:18,466 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223439206] [2021-06-05 15:19:18,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:19:18,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:19:18,566 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 15:19:18,567 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:19:18,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223439206] [2021-06-05 15:19:18,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223439206] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 15:19:18,567 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 15:19:18,567 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 15:19:18,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40005021] [2021-06-05 15:19:18,568 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 15:19:18,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:19:18,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 15:19:18,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 15:19:18,569 INFO L87 Difference]: Start difference. First operand 2163 states and 8671 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:18,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:19:18,690 INFO L93 Difference]: Finished difference Result 3426 states and 13470 transitions. [2021-06-05 15:19:18,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 15:19:18,691 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 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 30 [2021-06-05 15:19:18,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:19:18,713 INFO L225 Difference]: With dead ends: 3426 [2021-06-05 15:19:18,714 INFO L226 Difference]: Without dead ends: 3395 [2021-06-05 15:19:18,714 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 44.0ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-05 15:19:18,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3395 states. [2021-06-05 15:19:18,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3395 to 2948. [2021-06-05 15:19:18,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2948 states, 2947 states have (on average 4.058025110281642) internal successors, (11959), 2947 states have internal predecessors, (11959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:18,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2948 states to 2948 states and 11959 transitions. [2021-06-05 15:19:18,818 INFO L78 Accepts]: Start accepts. Automaton has 2948 states and 11959 transitions. Word has length 30 [2021-06-05 15:19:18,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:19:18,819 INFO L482 AbstractCegarLoop]: Abstraction has 2948 states and 11959 transitions. [2021-06-05 15:19:18,819 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:18,820 INFO L276 IsEmpty]: Start isEmpty. Operand 2948 states and 11959 transitions. [2021-06-05 15:19:18,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 15:19:18,828 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:19:18,828 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:19:18,828 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-06-05 15:19:18,829 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:19:18,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:19:18,830 INFO L82 PathProgramCache]: Analyzing trace with hash -721503632, now seen corresponding path program 3 times [2021-06-05 15:19:18,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:19:18,831 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730256668] [2021-06-05 15:19:18,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:19:18,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:19:18,927 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:19:18,927 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:19:18,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730256668] [2021-06-05 15:19:18,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730256668] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:19:18,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537825092] [2021-06-05 15:19:18,930 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:19:18,985 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:19:18,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:19:18,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 15:19:18,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:19:19,142 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:19:19,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1537825092] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:19:19,143 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:19:19,143 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2021-06-05 15:19:19,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808867957] [2021-06-05 15:19:19,143 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 15:19:19,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:19:19,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 15:19:19,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-06-05 15:19:19,144 INFO L87 Difference]: Start difference. First operand 2948 states and 11959 transitions. Second operand has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 13 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:19,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:19:19,563 INFO L93 Difference]: Finished difference Result 10235 states and 40121 transitions. [2021-06-05 15:19:19,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 15:19:19,565 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 13 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 15:19:19,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:19:19,632 INFO L225 Difference]: With dead ends: 10235 [2021-06-05 15:19:19,632 INFO L226 Difference]: Without dead ends: 10235 [2021-06-05 15:19:19,633 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 271.5ms TimeCoverageRelationStatistics Valid=185, Invalid=465, Unknown=0, NotChecked=0, Total=650 [2021-06-05 15:19:19,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10235 states. [2021-06-05 15:19:19,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10235 to 4372. [2021-06-05 15:19:19,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4372 states, 4371 states have (on average 4.153511782200869) internal successors, (18155), 4371 states have internal predecessors, (18155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:19,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4372 states to 4372 states and 18155 transitions. [2021-06-05 15:19:19,867 INFO L78 Accepts]: Start accepts. Automaton has 4372 states and 18155 transitions. Word has length 32 [2021-06-05 15:19:19,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:19:19,867 INFO L482 AbstractCegarLoop]: Abstraction has 4372 states and 18155 transitions. [2021-06-05 15:19:19,867 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 13 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:19,867 INFO L276 IsEmpty]: Start isEmpty. Operand 4372 states and 18155 transitions. [2021-06-05 15:19:19,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 15:19:19,880 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:19:19,880 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:19:20,100 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:19:20,101 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:19:20,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:19:20,101 INFO L82 PathProgramCache]: Analyzing trace with hash 1838023666, now seen corresponding path program 1 times [2021-06-05 15:19:20,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:19:20,101 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096549259] [2021-06-05 15:19:20,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:19:20,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:19:20,165 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 15:19:20,165 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:19:20,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096549259] [2021-06-05 15:19:20,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096549259] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:19:20,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750558501] [2021-06-05 15:19:20,166 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) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:19:20,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:19:20,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 15:19:20,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:19:20,338 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 15:19:20,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [750558501] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:19:20,338 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:19:20,338 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-06-05 15:19:20,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882106131] [2021-06-05 15:19:20,339 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 15:19:20,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:19:20,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 15:19:20,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-06-05 15:19:20,340 INFO L87 Difference]: Start difference. First operand 4372 states and 18155 transitions. Second operand has 10 states, 10 states have (on average 5.6) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:20,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:19:20,491 INFO L93 Difference]: Finished difference Result 8631 states and 35204 transitions. [2021-06-05 15:19:20,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 15:19:20,492 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 15:19:20,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:19:20,520 INFO L225 Difference]: With dead ends: 8631 [2021-06-05 15:19:20,521 INFO L226 Difference]: Without dead ends: 8631 [2021-06-05 15:19:20,521 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 101.3ms TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-06-05 15:19:20,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8631 states. [2021-06-05 15:19:20,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8631 to 5549. [2021-06-05 15:19:20,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5549 states, 5548 states have (on average 4.195385724585436) internal successors, (23276), 5548 states have internal predecessors, (23276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:20,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5549 states to 5549 states and 23276 transitions. [2021-06-05 15:19:20,781 INFO L78 Accepts]: Start accepts. Automaton has 5549 states and 23276 transitions. Word has length 32 [2021-06-05 15:19:20,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:19:20,781 INFO L482 AbstractCegarLoop]: Abstraction has 5549 states and 23276 transitions. [2021-06-05 15:19:20,782 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.6) internal successors, (56), 10 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:20,782 INFO L276 IsEmpty]: Start isEmpty. Operand 5549 states and 23276 transitions. [2021-06-05 15:19:20,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 15:19:20,798 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:19:20,798 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:19:21,021 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:19:21,021 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:19:21,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:19:21,022 INFO L82 PathProgramCache]: Analyzing trace with hash -1572403148, now seen corresponding path program 4 times [2021-06-05 15:19:21,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:19:21,022 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313650472] [2021-06-05 15:19:21,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:19:21,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:19:21,073 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:19:21,074 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:19:21,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313650472] [2021-06-05 15:19:21,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [313650472] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:19:21,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498510014] [2021-06-05 15:19:21,074 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:19:21,108 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:19:21,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:19:21,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 15:19:21,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:19:21,237 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:19:21,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498510014] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:19:21,238 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:19:21,238 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-05 15:19:21,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135628257] [2021-06-05 15:19:21,239 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 15:19:21,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:19:21,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 15:19:21,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-06-05 15:19:21,239 INFO L87 Difference]: Start difference. First operand 5549 states and 23276 transitions. Second operand has 13 states, 13 states have (on average 4.0) internal successors, (52), 12 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:21,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:19:21,663 INFO L93 Difference]: Finished difference Result 15361 states and 62588 transitions. [2021-06-05 15:19:21,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 15:19:21,664 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 12 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 15:19:21,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:19:21,741 INFO L225 Difference]: With dead ends: 15361 [2021-06-05 15:19:21,741 INFO L226 Difference]: Without dead ends: 15091 [2021-06-05 15:19:21,741 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 274.3ms TimeCoverageRelationStatistics Valid=177, Invalid=473, Unknown=0, NotChecked=0, Total=650 [2021-06-05 15:19:21,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15091 states. [2021-06-05 15:19:21,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15091 to 8451. [2021-06-05 15:19:22,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8451 states, 8450 states have (on average 4.295739644970414) internal successors, (36299), 8450 states have internal predecessors, (36299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:22,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8451 states to 8451 states and 36299 transitions. [2021-06-05 15:19:22,046 INFO L78 Accepts]: Start accepts. Automaton has 8451 states and 36299 transitions. Word has length 32 [2021-06-05 15:19:22,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:19:22,046 INFO L482 AbstractCegarLoop]: Abstraction has 8451 states and 36299 transitions. [2021-06-05 15:19:22,046 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 12 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:22,046 INFO L276 IsEmpty]: Start isEmpty. Operand 8451 states and 36299 transitions. [2021-06-05 15:19:22,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 15:19:22,080 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:19:22,080 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:19:22,306 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-06-05 15:19:22,307 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:19:22,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:19:22,307 INFO L82 PathProgramCache]: Analyzing trace with hash 825554672, now seen corresponding path program 1 times [2021-06-05 15:19:22,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:19:22,307 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330790211] [2021-06-05 15:19:22,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:19:22,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:19:22,357 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 15:19:22,358 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:19:22,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330790211] [2021-06-05 15:19:22,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330790211] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 15:19:22,358 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 15:19:22,358 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 15:19:22,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129472219] [2021-06-05 15:19:22,360 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 15:19:22,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:19:22,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 15:19:22,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-05 15:19:22,361 INFO L87 Difference]: Start difference. First operand 8451 states and 36299 transitions. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:22,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:19:22,517 INFO L93 Difference]: Finished difference Result 11634 states and 49174 transitions. [2021-06-05 15:19:22,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 15:19:22,518 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 15:19:22,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:19:22,553 INFO L225 Difference]: With dead ends: 11634 [2021-06-05 15:19:22,553 INFO L226 Difference]: Without dead ends: 11496 [2021-06-05 15:19:22,553 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 38.9ms TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-06-05 15:19:22,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11496 states. [2021-06-05 15:19:22,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11496 to 9206. [2021-06-05 15:19:22,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9206 states, 9205 states have (on average 4.329277566539924) internal successors, (39851), 9205 states have internal predecessors, (39851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:22,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9206 states to 9206 states and 39851 transitions. [2021-06-05 15:19:22,848 INFO L78 Accepts]: Start accepts. Automaton has 9206 states and 39851 transitions. Word has length 32 [2021-06-05 15:19:22,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:19:22,849 INFO L482 AbstractCegarLoop]: Abstraction has 9206 states and 39851 transitions. [2021-06-05 15:19:22,849 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:22,849 INFO L276 IsEmpty]: Start isEmpty. Operand 9206 states and 39851 transitions. [2021-06-05 15:19:22,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 15:19:22,872 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:19:22,872 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:19:22,872 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-06-05 15:19:22,872 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:19:22,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:19:22,873 INFO L82 PathProgramCache]: Analyzing trace with hash 1089339216, now seen corresponding path program 2 times [2021-06-05 15:19:22,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:19:22,873 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649350964] [2021-06-05 15:19:22,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:19:22,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:19:22,934 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 15:19:22,934 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:19:22,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649350964] [2021-06-05 15:19:22,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649350964] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 15:19:22,934 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 15:19:22,934 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 15:19:22,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464327500] [2021-06-05 15:19:22,935 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 15:19:22,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:19:22,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 15:19:22,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-05 15:19:22,935 INFO L87 Difference]: Start difference. First operand 9206 states and 39851 transitions. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:23,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:19:23,074 INFO L93 Difference]: Finished difference Result 10977 states and 46247 transitions. [2021-06-05 15:19:23,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 15:19:23,074 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 15:19:23,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:19:23,102 INFO L225 Difference]: With dead ends: 10977 [2021-06-05 15:19:23,102 INFO L226 Difference]: Without dead ends: 10950 [2021-06-05 15:19:23,102 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 36.2ms TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-06-05 15:19:23,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10950 states. [2021-06-05 15:19:23,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10950 to 9177. [2021-06-05 15:19:23,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9177 states, 9176 states have (on average 4.283129904097646) internal successors, (39302), 9176 states have internal predecessors, (39302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:23,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9177 states to 9177 states and 39302 transitions. [2021-06-05 15:19:23,473 INFO L78 Accepts]: Start accepts. Automaton has 9177 states and 39302 transitions. Word has length 32 [2021-06-05 15:19:23,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:19:23,474 INFO L482 AbstractCegarLoop]: Abstraction has 9177 states and 39302 transitions. [2021-06-05 15:19:23,474 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:23,474 INFO L276 IsEmpty]: Start isEmpty. Operand 9177 states and 39302 transitions. [2021-06-05 15:19:23,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 15:19:23,498 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:19:23,498 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:19:23,499 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-06-05 15:19:23,499 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:19:23,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:19:23,499 INFO L82 PathProgramCache]: Analyzing trace with hash 1444113172, now seen corresponding path program 2 times [2021-06-05 15:19:23,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:19:23,499 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187517153] [2021-06-05 15:19:23,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:19:23,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:19:23,543 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 15:19:23,543 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:19:23,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187517153] [2021-06-05 15:19:23,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187517153] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 15:19:23,543 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 15:19:23,543 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 15:19:23,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783037166] [2021-06-05 15:19:23,544 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 15:19:23,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:19:23,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 15:19:23,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-05 15:19:23,549 INFO L87 Difference]: Start difference. First operand 9177 states and 39302 transitions. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:23,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:19:23,720 INFO L93 Difference]: Finished difference Result 11062 states and 46211 transitions. [2021-06-05 15:19:23,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 15:19:23,721 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 15:19:23,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:19:23,747 INFO L225 Difference]: With dead ends: 11062 [2021-06-05 15:19:23,747 INFO L226 Difference]: Without dead ends: 11002 [2021-06-05 15:19:23,747 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 41.3ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-05 15:19:23,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11002 states. [2021-06-05 15:19:23,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11002 to 9261. [2021-06-05 15:19:23,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9261 states, 9260 states have (on average 4.27645788336933) internal successors, (39600), 9260 states have internal predecessors, (39600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:24,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9261 states to 9261 states and 39600 transitions. [2021-06-05 15:19:24,026 INFO L78 Accepts]: Start accepts. Automaton has 9261 states and 39600 transitions. Word has length 32 [2021-06-05 15:19:24,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:19:24,026 INFO L482 AbstractCegarLoop]: Abstraction has 9261 states and 39600 transitions. [2021-06-05 15:19:24,026 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 6 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:24,027 INFO L276 IsEmpty]: Start isEmpty. Operand 9261 states and 39600 transitions. [2021-06-05 15:19:24,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 15:19:24,051 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:19:24,051 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:19:24,051 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-06-05 15:19:24,051 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:19:24,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:19:24,052 INFO L82 PathProgramCache]: Analyzing trace with hash 464079412, now seen corresponding path program 5 times [2021-06-05 15:19:24,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:19:24,052 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098008188] [2021-06-05 15:19:24,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:19:24,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:19:24,093 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:19:24,093 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:19:24,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098008188] [2021-06-05 15:19:24,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098008188] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:19:24,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514692588] [2021-06-05 15:19:24,094 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:19:24,135 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:19:24,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:19:24,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 15:19:24,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:19:24,249 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:19:24,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [514692588] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:19:24,250 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:19:24,250 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-06-05 15:19:24,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774774240] [2021-06-05 15:19:24,250 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 15:19:24,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:19:24,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 15:19:24,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-05 15:19:24,251 INFO L87 Difference]: Start difference. First operand 9261 states and 39600 transitions. Second operand has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:24,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:19:24,750 INFO L93 Difference]: Finished difference Result 17289 states and 70842 transitions. [2021-06-05 15:19:24,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 15:19:24,750 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 15:19:24,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:19:24,803 INFO L225 Difference]: With dead ends: 17289 [2021-06-05 15:19:24,803 INFO L226 Difference]: Without dead ends: 17289 [2021-06-05 15:19:24,803 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 270.6ms TimeCoverageRelationStatistics Valid=155, Invalid=351, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:19:24,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17289 states. [2021-06-05 15:19:25,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17289 to 10772. [2021-06-05 15:19:25,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10772 states, 10771 states have (on average 4.3019218271284005) internal successors, (46336), 10771 states have internal predecessors, (46336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:25,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10772 states to 10772 states and 46336 transitions. [2021-06-05 15:19:25,145 INFO L78 Accepts]: Start accepts. Automaton has 10772 states and 46336 transitions. Word has length 32 [2021-06-05 15:19:25,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:19:25,146 INFO L482 AbstractCegarLoop]: Abstraction has 10772 states and 46336 transitions. [2021-06-05 15:19:25,146 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:25,146 INFO L276 IsEmpty]: Start isEmpty. Operand 10772 states and 46336 transitions. [2021-06-05 15:19:25,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 15:19:25,172 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:19:25,172 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:19:25,372 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:19:25,372 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:19:25,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:19:25,373 INFO L82 PathProgramCache]: Analyzing trace with hash 1111982064, now seen corresponding path program 6 times [2021-06-05 15:19:25,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:19:25,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175770615] [2021-06-05 15:19:25,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:19:25,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:19:25,518 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:19:25,518 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:19:25,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175770615] [2021-06-05 15:19:25,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175770615] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:19:25,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795758658] [2021-06-05 15:19:25,519 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:19:25,557 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 15:19:25,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:19:25,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 15:19:25,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:19:25,686 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:19:25,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1795758658] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:19:25,687 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:19:25,687 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-06-05 15:19:25,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826122999] [2021-06-05 15:19:25,687 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 15:19:25,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:19:25,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 15:19:25,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-06-05 15:19:25,688 INFO L87 Difference]: Start difference. First operand 10772 states and 46336 transitions. Second operand has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:26,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:19:26,117 INFO L93 Difference]: Finished difference Result 17283 states and 70897 transitions. [2021-06-05 15:19:26,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 15:19:26,118 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 15:19:26,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:19:26,162 INFO L225 Difference]: With dead ends: 17283 [2021-06-05 15:19:26,162 INFO L226 Difference]: Without dead ends: 17145 [2021-06-05 15:19:26,162 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 291.7ms TimeCoverageRelationStatistics Valid=176, Invalid=424, Unknown=0, NotChecked=0, Total=600 [2021-06-05 15:19:26,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17145 states. [2021-06-05 15:19:26,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17145 to 10795. [2021-06-05 15:19:26,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10795 states, 10794 states have (on average 4.285158421345192) internal successors, (46254), 10794 states have internal predecessors, (46254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:26,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10795 states to 10795 states and 46254 transitions. [2021-06-05 15:19:26,507 INFO L78 Accepts]: Start accepts. Automaton has 10795 states and 46254 transitions. Word has length 32 [2021-06-05 15:19:26,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:19:26,507 INFO L482 AbstractCegarLoop]: Abstraction has 10795 states and 46254 transitions. [2021-06-05 15:19:26,507 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:26,507 INFO L276 IsEmpty]: Start isEmpty. Operand 10795 states and 46254 transitions. [2021-06-05 15:19:26,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 15:19:26,527 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:19:26,527 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:19:26,727 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-06-05 15:19:26,728 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:19:26,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:19:26,728 INFO L82 PathProgramCache]: Analyzing trace with hash 416936404, now seen corresponding path program 7 times [2021-06-05 15:19:26,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:19:26,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160590329] [2021-06-05 15:19:26,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:19:26,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:19:26,781 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:19:26,782 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:19:26,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160590329] [2021-06-05 15:19:26,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160590329] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:19:26,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023674226] [2021-06-05 15:19:26,782 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:19:26,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:19:26,820 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 15:19:26,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:19:26,940 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:19:26,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1023674226] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:19:26,941 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:19:26,941 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-05 15:19:26,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125436222] [2021-06-05 15:19:26,942 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 15:19:26,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:19:26,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 15:19:26,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 15:19:26,943 INFO L87 Difference]: Start difference. First operand 10795 states and 46254 transitions. Second operand has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 12 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:27,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:19:27,461 INFO L93 Difference]: Finished difference Result 26096 states and 108482 transitions. [2021-06-05 15:19:27,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 15:19:27,461 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 12 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 15:19:27,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:19:27,534 INFO L225 Difference]: With dead ends: 26096 [2021-06-05 15:19:27,535 INFO L226 Difference]: Without dead ends: 26096 [2021-06-05 15:19:27,535 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 271.6ms TimeCoverageRelationStatistics Valid=218, Invalid=484, Unknown=0, NotChecked=0, Total=702 [2021-06-05 15:19:27,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26096 states. [2021-06-05 15:19:27,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26096 to 14993. [2021-06-05 15:19:27,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14993 states, 14992 states have (on average 4.368729989327641) internal successors, (65496), 14992 states have internal predecessors, (65496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:28,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14993 states to 14993 states and 65496 transitions. [2021-06-05 15:19:28,142 INFO L78 Accepts]: Start accepts. Automaton has 14993 states and 65496 transitions. Word has length 32 [2021-06-05 15:19:28,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:19:28,144 INFO L482 AbstractCegarLoop]: Abstraction has 14993 states and 65496 transitions. [2021-06-05 15:19:28,144 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 12 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:28,144 INFO L276 IsEmpty]: Start isEmpty. Operand 14993 states and 65496 transitions. [2021-06-05 15:19:28,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 15:19:28,175 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:19:28,175 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:19:28,376 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-06-05 15:19:28,376 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:19:28,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:19:28,377 INFO L82 PathProgramCache]: Analyzing trace with hash -1927074446, now seen corresponding path program 8 times [2021-06-05 15:19:28,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:19:28,377 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944111067] [2021-06-05 15:19:28,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:19:28,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:19:28,429 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:19:28,430 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:19:28,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944111067] [2021-06-05 15:19:28,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944111067] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:19:28,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069294217] [2021-06-05 15:19:28,430 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:19:28,464 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:19:28,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:19:28,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 15:19:28,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:19:28,610 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:19:28,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2069294217] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:19:28,610 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:19:28,611 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-06-05 15:19:28,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776937142] [2021-06-05 15:19:28,612 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 15:19:28,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:19:28,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 15:19:28,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-06-05 15:19:28,613 INFO L87 Difference]: Start difference. First operand 14993 states and 65496 transitions. Second operand has 12 states, 12 states have (on average 4.25) internal successors, (51), 11 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:29,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:19:29,087 INFO L93 Difference]: Finished difference Result 19071 states and 81167 transitions. [2021-06-05 15:19:29,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 15:19:29,087 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 11 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 15:19:29,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:19:29,140 INFO L225 Difference]: With dead ends: 19071 [2021-06-05 15:19:29,141 INFO L226 Difference]: Without dead ends: 19009 [2021-06-05 15:19:29,141 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 215.2ms TimeCoverageRelationStatistics Valid=129, Invalid=333, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:19:29,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19009 states. [2021-06-05 15:19:29,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19009 to 15495. [2021-06-05 15:19:29,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15495 states, 15494 states have (on average 4.3805344004130635) internal successors, (67872), 15494 states have internal predecessors, (67872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:29,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15495 states to 15495 states and 67872 transitions. [2021-06-05 15:19:29,609 INFO L78 Accepts]: Start accepts. Automaton has 15495 states and 67872 transitions. Word has length 32 [2021-06-05 15:19:29,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:19:29,609 INFO L482 AbstractCegarLoop]: Abstraction has 15495 states and 67872 transitions. [2021-06-05 15:19:29,609 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 11 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:29,609 INFO L276 IsEmpty]: Start isEmpty. Operand 15495 states and 67872 transitions. [2021-06-05 15:19:29,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 15:19:29,639 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:19:29,639 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:19:29,847 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-06-05 15:19:29,847 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:19:29,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:19:29,848 INFO L82 PathProgramCache]: Analyzing trace with hash -1333496630, now seen corresponding path program 9 times [2021-06-05 15:19:29,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:19:29,848 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560324313] [2021-06-05 15:19:29,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:19:29,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:19:29,897 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:19:29,897 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:19:29,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560324313] [2021-06-05 15:19:29,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560324313] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:19:29,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336949968] [2021-06-05 15:19:29,898 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:19:29,949 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:19:29,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:19:29,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 15:19:29,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:19:30,053 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:19:30,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [336949968] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:19:30,053 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:19:30,053 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-06-05 15:19:30,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691146198] [2021-06-05 15:19:30,053 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 15:19:30,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:19:30,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 15:19:30,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-06-05 15:19:30,054 INFO L87 Difference]: Start difference. First operand 15495 states and 67872 transitions. Second operand has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:30,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:19:30,568 INFO L93 Difference]: Finished difference Result 25596 states and 106759 transitions. [2021-06-05 15:19:30,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 15:19:30,569 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 15:19:30,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:19:30,642 INFO L225 Difference]: With dead ends: 25596 [2021-06-05 15:19:30,642 INFO L226 Difference]: Without dead ends: 25518 [2021-06-05 15:19:30,642 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 206.3ms TimeCoverageRelationStatistics Valid=168, Invalid=384, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:19:30,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25518 states. [2021-06-05 15:19:31,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25518 to 15518. [2021-06-05 15:19:31,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15518 states, 15517 states have (on average 4.374299155764645) internal successors, (67876), 15517 states have internal predecessors, (67876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:31,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15518 states to 15518 states and 67876 transitions. [2021-06-05 15:19:31,119 INFO L78 Accepts]: Start accepts. Automaton has 15518 states and 67876 transitions. Word has length 32 [2021-06-05 15:19:31,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:19:31,119 INFO L482 AbstractCegarLoop]: Abstraction has 15518 states and 67876 transitions. [2021-06-05 15:19:31,119 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:31,119 INFO L276 IsEmpty]: Start isEmpty. Operand 15518 states and 67876 transitions. [2021-06-05 15:19:31,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-06-05 15:19:31,155 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:19:31,155 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:19:31,367 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-06-05 15:19:31,367 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:19:31,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:19:31,368 INFO L82 PathProgramCache]: Analyzing trace with hash -126625480, now seen corresponding path program 10 times [2021-06-05 15:19:31,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:19:31,368 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098370464] [2021-06-05 15:19:31,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:19:31,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:19:31,419 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:19:31,419 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:19:31,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098370464] [2021-06-05 15:19:31,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098370464] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:19:31,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479715368] [2021-06-05 15:19:31,419 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:19:31,464 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:19:31,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:19:31,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 15:19:31,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:19:31,587 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:19:31,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1479715368] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:19:31,588 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:19:31,588 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-05 15:19:31,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819122583] [2021-06-05 15:19:31,589 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 15:19:31,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:19:31,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 15:19:31,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-06-05 15:19:31,590 INFO L87 Difference]: Start difference. First operand 15518 states and 67876 transitions. Second operand has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:32,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:19:32,184 INFO L93 Difference]: Finished difference Result 25214 states and 104840 transitions. [2021-06-05 15:19:32,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 15:19:32,184 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-06-05 15:19:32,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:19:32,261 INFO L225 Difference]: With dead ends: 25214 [2021-06-05 15:19:32,261 INFO L226 Difference]: Without dead ends: 25094 [2021-06-05 15:19:32,262 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 317.5ms TimeCoverageRelationStatistics Valid=236, Invalid=576, Unknown=0, NotChecked=0, Total=812 [2021-06-05 15:19:32,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25094 states. [2021-06-05 15:19:32,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25094 to 16132. [2021-06-05 15:19:32,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16132 states, 16131 states have (on average 4.372140598846941) internal successors, (70527), 16131 states have internal predecessors, (70527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:32,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16132 states to 16132 states and 70527 transitions. [2021-06-05 15:19:32,902 INFO L78 Accepts]: Start accepts. Automaton has 16132 states and 70527 transitions. Word has length 32 [2021-06-05 15:19:32,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:19:32,902 INFO L482 AbstractCegarLoop]: Abstraction has 16132 states and 70527 transitions. [2021-06-05 15:19:32,903 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.769230769230769) internal successors, (49), 12 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:32,903 INFO L276 IsEmpty]: Start isEmpty. Operand 16132 states and 70527 transitions. [2021-06-05 15:19:32,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 15:19:32,932 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:19:32,932 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:19:33,132 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:19:33,133 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:19:33,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:19:33,133 INFO L82 PathProgramCache]: Analyzing trace with hash -906083662, now seen corresponding path program 11 times [2021-06-05 15:19:33,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:19:33,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222983349] [2021-06-05 15:19:33,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:19:33,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:19:33,193 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:19:33,193 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:19:33,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222983349] [2021-06-05 15:19:33,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222983349] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:19:33,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152176804] [2021-06-05 15:19:33,193 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:19:33,236 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:19:33,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:19:33,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 15:19:33,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:19:33,373 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:19:33,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [152176804] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:19:33,374 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:19:33,374 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 11 [2021-06-05 15:19:33,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946500794] [2021-06-05 15:19:33,374 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 15:19:33,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:19:33,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 15:19:33,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-05 15:19:33,375 INFO L87 Difference]: Start difference. First operand 16132 states and 70527 transitions. Second operand has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 11 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:33,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:19:33,649 INFO L93 Difference]: Finished difference Result 30028 states and 127196 transitions. [2021-06-05 15:19:33,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 15:19:33,649 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 11 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-05 15:19:33,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:19:33,747 INFO L225 Difference]: With dead ends: 30028 [2021-06-05 15:19:33,747 INFO L226 Difference]: Without dead ends: 29440 [2021-06-05 15:19:33,747 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 85.8ms TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-05 15:19:33,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29440 states. [2021-06-05 15:19:34,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29440 to 21834. [2021-06-05 15:19:34,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21834 states, 21833 states have (on average 4.3858379517244535) internal successors, (95756), 21833 states have internal predecessors, (95756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:34,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21834 states to 21834 states and 95756 transitions. [2021-06-05 15:19:34,437 INFO L78 Accepts]: Start accepts. Automaton has 21834 states and 95756 transitions. Word has length 34 [2021-06-05 15:19:34,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:19:34,437 INFO L482 AbstractCegarLoop]: Abstraction has 21834 states and 95756 transitions. [2021-06-05 15:19:34,437 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 11 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:34,437 INFO L276 IsEmpty]: Start isEmpty. Operand 21834 states and 95756 transitions. [2021-06-05 15:19:34,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 15:19:34,632 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:19:34,633 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:19:34,848 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:19:34,849 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:19:34,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:19:34,849 INFO L82 PathProgramCache]: Analyzing trace with hash 778013198, now seen corresponding path program 12 times [2021-06-05 15:19:34,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:19:34,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081465908] [2021-06-05 15:19:34,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:19:34,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:19:34,891 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 15:19:34,891 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:19:34,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081465908] [2021-06-05 15:19:34,892 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081465908] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:19:34,892 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509487347] [2021-06-05 15:19:34,892 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:19:34,941 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 15:19:34,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:19:34,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 15:19:34,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:19:35,066 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:19:35,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [509487347] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:19:35,066 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:19:35,066 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 11 [2021-06-05 15:19:35,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247047960] [2021-06-05 15:19:35,067 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 15:19:35,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:19:35,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 15:19:35,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-05 15:19:35,067 INFO L87 Difference]: Start difference. First operand 21834 states and 95756 transitions. Second operand has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 11 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:35,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:19:35,471 INFO L93 Difference]: Finished difference Result 60940 states and 262767 transitions. [2021-06-05 15:19:35,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 15:19:35,471 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 11 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-05 15:19:35,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:19:35,922 INFO L225 Difference]: With dead ends: 60940 [2021-06-05 15:19:35,922 INFO L226 Difference]: Without dead ends: 58958 [2021-06-05 15:19:35,922 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 90.7ms TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-05 15:19:35,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58958 states. [2021-06-05 15:19:36,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58958 to 39850. [2021-06-05 15:19:37,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39850 states, 39849 states have (on average 4.48199452934829) internal successors, (178603), 39849 states have internal predecessors, (178603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:37,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39850 states to 39850 states and 178603 transitions. [2021-06-05 15:19:37,168 INFO L78 Accepts]: Start accepts. Automaton has 39850 states and 178603 transitions. Word has length 34 [2021-06-05 15:19:37,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:19:37,168 INFO L482 AbstractCegarLoop]: Abstraction has 39850 states and 178603 transitions. [2021-06-05 15:19:37,168 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 11 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:37,168 INFO L276 IsEmpty]: Start isEmpty. Operand 39850 states and 178603 transitions. [2021-06-05 15:19:37,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 15:19:37,261 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:19:37,261 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:19:37,463 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-06-05 15:19:37,463 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:19:37,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:19:37,463 INFO L82 PathProgramCache]: Analyzing trace with hash 582128274, now seen corresponding path program 13 times [2021-06-05 15:19:37,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:19:37,463 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195688258] [2021-06-05 15:19:37,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:19:37,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:19:37,516 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 15:19:37,516 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:19:37,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195688258] [2021-06-05 15:19:37,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195688258] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:19:37,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191417707] [2021-06-05 15:19:37,517 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:19:37,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:19:37,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 15:19:37,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:19:37,677 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:19:37,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [191417707] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:19:37,677 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:19:37,677 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 11 [2021-06-05 15:19:37,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059030023] [2021-06-05 15:19:37,677 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 15:19:37,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:19:37,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 15:19:37,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-06-05 15:19:37,678 INFO L87 Difference]: Start difference. First operand 39850 states and 178603 transitions. Second operand has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 11 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:38,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:19:38,421 INFO L93 Difference]: Finished difference Result 60941 states and 268418 transitions. [2021-06-05 15:19:38,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 15:19:38,422 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 11 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-05 15:19:38,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:19:38,621 INFO L225 Difference]: With dead ends: 60941 [2021-06-05 15:19:38,621 INFO L226 Difference]: Without dead ends: 60279 [2021-06-05 15:19:38,621 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 76.6ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-06-05 15:19:38,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60279 states. [2021-06-05 15:19:40,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60279 to 54948. [2021-06-05 15:19:40,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54948 states, 54947 states have (on average 4.507143247129052) internal successors, (247654), 54947 states have internal predecessors, (247654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:40,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54948 states to 54948 states and 247654 transitions. [2021-06-05 15:19:40,544 INFO L78 Accepts]: Start accepts. Automaton has 54948 states and 247654 transitions. Word has length 34 [2021-06-05 15:19:40,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:19:40,545 INFO L482 AbstractCegarLoop]: Abstraction has 54948 states and 247654 transitions. [2021-06-05 15:19:40,545 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.636363636363637) internal successors, (62), 11 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:40,545 INFO L276 IsEmpty]: Start isEmpty. Operand 54948 states and 247654 transitions. [2021-06-05 15:19:40,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:19:40,682 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:19:40,683 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:19:40,883 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:19:40,883 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:19:40,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:19:40,884 INFO L82 PathProgramCache]: Analyzing trace with hash -523184720, now seen corresponding path program 14 times [2021-06-05 15:19:40,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:19:40,884 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293636954] [2021-06-05 15:19:40,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:19:40,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:19:40,963 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:19:40,963 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:19:40,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293636954] [2021-06-05 15:19:40,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293636954] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:19:40,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164994977] [2021-06-05 15:19:40,964 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:19:40,999 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:19:41,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:19:41,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 15:19:41,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:19:41,453 WARN L205 SmtUtils]: Spent 329.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2021-06-05 15:19:41,553 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:19:41,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [164994977] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:19:41,553 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:19:41,553 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-06-05 15:19:41,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269217620] [2021-06-05 15:19:41,554 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 15:19:41,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:19:41,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 15:19:41,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-06-05 15:19:41,554 INFO L87 Difference]: Start difference. First operand 54948 states and 247654 transitions. Second operand has 18 states, 18 states have (on average 3.4444444444444446) internal successors, (62), 17 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:43,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:19:43,062 INFO L93 Difference]: Finished difference Result 115835 states and 498368 transitions. [2021-06-05 15:19:43,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 15:19:43,077 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.4444444444444446) internal successors, (62), 17 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 15:19:43,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:19:43,532 INFO L225 Difference]: With dead ends: 115835 [2021-06-05 15:19:43,532 INFO L226 Difference]: Without dead ends: 115835 [2021-06-05 15:19:43,532 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 463.6ms TimeCoverageRelationStatistics Valid=402, Invalid=1080, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 15:19:43,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115835 states. [2021-06-05 15:19:45,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115835 to 56994. [2021-06-05 15:19:45,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56994 states, 56993 states have (on average 4.487621286824698) internal successors, (255763), 56993 states have internal predecessors, (255763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:45,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56994 states to 56994 states and 255763 transitions. [2021-06-05 15:19:45,906 INFO L78 Accepts]: Start accepts. Automaton has 56994 states and 255763 transitions. Word has length 36 [2021-06-05 15:19:45,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:19:45,906 INFO L482 AbstractCegarLoop]: Abstraction has 56994 states and 255763 transitions. [2021-06-05 15:19:45,906 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.4444444444444446) internal successors, (62), 17 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:45,906 INFO L276 IsEmpty]: Start isEmpty. Operand 56994 states and 255763 transitions. [2021-06-05 15:19:46,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:19:46,051 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:19:46,051 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:19:46,252 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-06-05 15:19:46,252 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:19:46,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:19:46,253 INFO L82 PathProgramCache]: Analyzing trace with hash 2101133940, now seen corresponding path program 15 times [2021-06-05 15:19:46,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:19:46,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1423313550] [2021-06-05 15:19:46,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:19:46,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:19:46,325 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:19:46,325 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:19:46,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1423313550] [2021-06-05 15:19:46,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1423313550] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:19:46,325 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416127385] [2021-06-05 15:19:46,325 INFO L93 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 [2021-06-05 15:19:46,364 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 15:19:46,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:19:46,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 15:19:46,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:19:46,530 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:19:46,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1416127385] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:19:46,530 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:19:46,530 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 15:19:46,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269289232] [2021-06-05 15:19:46,531 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 15:19:46,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:19:46,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 15:19:46,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-06-05 15:19:46,531 INFO L87 Difference]: Start difference. First operand 56994 states and 255763 transitions. Second operand has 17 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 16 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:48,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:19:48,253 INFO L93 Difference]: Finished difference Result 148781 states and 646238 transitions. [2021-06-05 15:19:48,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 15:19:48,253 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 16 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 15:19:48,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:19:49,363 INFO L225 Difference]: With dead ends: 148781 [2021-06-05 15:19:49,363 INFO L226 Difference]: Without dead ends: 147463 [2021-06-05 15:19:49,364 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 564.9ms TimeCoverageRelationStatistics Valid=449, Invalid=1357, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 15:19:49,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147463 states. [2021-06-05 15:19:52,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147463 to 80557. [2021-06-05 15:19:52,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80557 states, 80556 states have (on average 4.52723571180297) internal successors, (364696), 80556 states have internal predecessors, (364696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:53,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80557 states to 80557 states and 364696 transitions. [2021-06-05 15:19:53,497 INFO L78 Accepts]: Start accepts. Automaton has 80557 states and 364696 transitions. Word has length 36 [2021-06-05 15:19:53,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:19:53,497 INFO L482 AbstractCegarLoop]: Abstraction has 80557 states and 364696 transitions. [2021-06-05 15:19:53,497 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 16 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:53,497 INFO L276 IsEmpty]: Start isEmpty. Operand 80557 states and 364696 transitions. [2021-06-05 15:19:53,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:19:53,679 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:19:53,679 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:19:53,879 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:19:53,879 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:19:53,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:19:53,880 INFO L82 PathProgramCache]: Analyzing trace with hash -8737100, now seen corresponding path program 16 times [2021-06-05 15:19:53,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:19:53,880 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625437809] [2021-06-05 15:19:53,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:19:53,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:19:53,930 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:19:53,930 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:19:53,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625437809] [2021-06-05 15:19:53,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625437809] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:19:53,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1721226326] [2021-06-05 15:19:53,931 INFO L93 rtionOrderModulation]: Changing 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 [2021-06-05 15:19:53,976 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:19:53,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:19:53,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 15:19:53,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:19:54,112 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:19:54,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1721226326] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:19:54,112 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:19:54,112 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 14 [2021-06-05 15:19:54,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182802468] [2021-06-05 15:19:54,113 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 15:19:54,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:19:54,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 15:19:54,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-06-05 15:19:54,113 INFO L87 Difference]: Start difference. First operand 80557 states and 364696 transitions. Second operand has 15 states, 15 states have (on average 3.8) internal successors, (57), 14 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:19:55,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:19:55,999 INFO L93 Difference]: Finished difference Result 170107 states and 749961 transitions. [2021-06-05 15:19:56,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 15:19:56,000 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.8) internal successors, (57), 14 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 15:19:56,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:19:56,640 INFO L225 Difference]: With dead ends: 170107 [2021-06-05 15:19:56,640 INFO L226 Difference]: Without dead ends: 170087 [2021-06-05 15:19:56,641 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 399.7ms TimeCoverageRelationStatistics Valid=387, Invalid=945, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:19:57,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170087 states. [2021-06-05 15:20:00,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170087 to 102149. [2021-06-05 15:20:01,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102149 states, 102148 states have (on average 4.5491933273289735) internal successors, (464691), 102148 states have internal predecessors, (464691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:20:01,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102149 states to 102149 states and 464691 transitions. [2021-06-05 15:20:01,960 INFO L78 Accepts]: Start accepts. Automaton has 102149 states and 464691 transitions. Word has length 36 [2021-06-05 15:20:01,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:20:01,960 INFO L482 AbstractCegarLoop]: Abstraction has 102149 states and 464691 transitions. [2021-06-05 15:20:01,960 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.8) internal successors, (57), 14 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:20:01,961 INFO L276 IsEmpty]: Start isEmpty. Operand 102149 states and 464691 transitions. [2021-06-05 15:20:02,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:20:02,140 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:20:02,140 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:20:02,352 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-06-05 15:20:02,352 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:20:02,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:20:02,353 INFO L82 PathProgramCache]: Analyzing trace with hash 639165552, now seen corresponding path program 17 times [2021-06-05 15:20:02,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:20:02,353 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701750791] [2021-06-05 15:20:02,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:20:02,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:20:02,400 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:20:02,400 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:20:02,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701750791] [2021-06-05 15:20:02,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701750791] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:20:02,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108698794] [2021-06-05 15:20:02,401 INFO L93 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 [2021-06-05 15:20:02,450 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 15:20:02,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:20:02,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 15:20:02,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:20:02,594 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:20:02,594 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1108698794] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:20:02,594 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:20:02,594 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 14 [2021-06-05 15:20:02,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565845242] [2021-06-05 15:20:02,595 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 15:20:02,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:20:02,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 15:20:02,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-06-05 15:20:02,595 INFO L87 Difference]: Start difference. First operand 102149 states and 464691 transitions. Second operand has 15 states, 15 states have (on average 3.8) internal successors, (57), 14 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:20:04,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:20:04,413 INFO L93 Difference]: Finished difference Result 140554 states and 618093 transitions. [2021-06-05 15:20:04,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 15:20:04,413 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.8) internal successors, (57), 14 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 15:20:04,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:20:04,952 INFO L225 Difference]: With dead ends: 140554 [2021-06-05 15:20:04,953 INFO L226 Difference]: Without dead ends: 140250 [2021-06-05 15:20:04,953 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 425.7ms TimeCoverageRelationStatistics Valid=356, Invalid=976, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:20:05,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140250 states. [2021-06-05 15:20:08,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140250 to 98725. [2021-06-05 15:20:08,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98725 states, 98724 states have (on average 4.555366476236781) internal successors, (449724), 98724 states have internal predecessors, (449724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:20:09,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98725 states to 98725 states and 449724 transitions. [2021-06-05 15:20:09,374 INFO L78 Accepts]: Start accepts. Automaton has 98725 states and 449724 transitions. Word has length 36 [2021-06-05 15:20:09,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:20:09,375 INFO L482 AbstractCegarLoop]: Abstraction has 98725 states and 449724 transitions. [2021-06-05 15:20:09,375 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.8) internal successors, (57), 14 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:20:09,375 INFO L276 IsEmpty]: Start isEmpty. Operand 98725 states and 449724 transitions. [2021-06-05 15:20:09,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:20:09,559 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:20:09,559 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:20:09,759 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-06-05 15:20:09,759 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:20:09,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:20:09,760 INFO L82 PathProgramCache]: Analyzing trace with hash -1378983634, now seen corresponding path program 18 times [2021-06-05 15:20:09,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:20:09,760 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45603611] [2021-06-05 15:20:09,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:20:09,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:20:09,805 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:20:09,805 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:20:09,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45603611] [2021-06-05 15:20:09,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45603611] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:20:09,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096160848] [2021-06-05 15:20:09,805 INFO L93 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 [2021-06-05 15:20:09,847 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 15:20:09,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:20:09,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 15:20:09,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:20:09,988 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:20:09,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1096160848] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:20:09,989 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:20:09,989 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 14 [2021-06-05 15:20:09,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360409209] [2021-06-05 15:20:09,989 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 15:20:09,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:20:09,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 15:20:09,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-06-05 15:20:09,990 INFO L87 Difference]: Start difference. First operand 98725 states and 449724 transitions. Second operand has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:20:11,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:20:11,760 INFO L93 Difference]: Finished difference Result 157433 states and 697584 transitions. [2021-06-05 15:20:11,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 15:20:11,760 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 15:20:11,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:20:12,985 INFO L225 Difference]: With dead ends: 157433 [2021-06-05 15:20:12,986 INFO L226 Difference]: Without dead ends: 156538 [2021-06-05 15:20:12,986 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 297.1ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-06-05 15:20:13,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156538 states. [2021-06-05 15:20:16,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156538 to 110101. [2021-06-05 15:20:16,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110101 states, 110100 states have (on average 4.5832970027247955) internal successors, (504621), 110100 states have internal predecessors, (504621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:20:17,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110101 states to 110101 states and 504621 transitions. [2021-06-05 15:20:17,729 INFO L78 Accepts]: Start accepts. Automaton has 110101 states and 504621 transitions. Word has length 36 [2021-06-05 15:20:17,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:20:17,729 INFO L482 AbstractCegarLoop]: Abstraction has 110101 states and 504621 transitions. [2021-06-05 15:20:17,730 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:20:17,730 INFO L276 IsEmpty]: Start isEmpty. Operand 110101 states and 504621 transitions. [2021-06-05 15:20:17,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:20:17,935 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:20:17,935 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:20:18,136 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-06-05 15:20:18,136 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:20:18,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:20:18,136 INFO L82 PathProgramCache]: Analyzing trace with hash 421465332, now seen corresponding path program 19 times [2021-06-05 15:20:18,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:20:18,137 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823859544] [2021-06-05 15:20:18,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:20:18,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:20:18,221 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:20:18,221 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:20:18,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823859544] [2021-06-05 15:20:18,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823859544] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:20:18,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340479127] [2021-06-05 15:20:18,222 INFO 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 [2021-06-05 15:20:18,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:20:18,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 15:20:18,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:20:18,428 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:20:18,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1340479127] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:20:18,428 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:20:18,428 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-06-05 15:20:18,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800553065] [2021-06-05 15:20:18,429 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 15:20:18,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:20:18,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 15:20:18,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-06-05 15:20:18,429 INFO L87 Difference]: Start difference. First operand 110101 states and 504621 transitions. Second operand has 16 states, 16 states have (on average 3.5625) internal successors, (57), 15 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:20:20,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:20:20,524 INFO L93 Difference]: Finished difference Result 192417 states and 850027 transitions. [2021-06-05 15:20:20,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 15:20:20,524 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 15 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 15:20:20,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:20:21,888 INFO L225 Difference]: With dead ends: 192417 [2021-06-05 15:20:21,888 INFO L226 Difference]: Without dead ends: 191725 [2021-06-05 15:20:21,889 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 427 ImplicationChecksByTransitivity, 493.5ms TimeCoverageRelationStatistics Valid=421, Invalid=1219, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 15:20:22,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191725 states. [2021-06-05 15:20:26,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191725 to 118442. [2021-06-05 15:20:26,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118442 states, 118441 states have (on average 4.604208002296502) internal successors, (545327), 118441 states have internal predecessors, (545327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:20:27,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118442 states to 118442 states and 545327 transitions. [2021-06-05 15:20:27,157 INFO L78 Accepts]: Start accepts. Automaton has 118442 states and 545327 transitions. Word has length 36 [2021-06-05 15:20:27,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:20:27,157 INFO L482 AbstractCegarLoop]: Abstraction has 118442 states and 545327 transitions. [2021-06-05 15:20:27,157 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 15 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:20:27,157 INFO L276 IsEmpty]: Start isEmpty. Operand 118442 states and 545327 transitions. [2021-06-05 15:20:27,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:20:27,366 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:20:27,366 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:20:27,589 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-06-05 15:20:27,590 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:20:27,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:20:27,590 INFO L82 PathProgramCache]: Analyzing trace with hash 1506818294, now seen corresponding path program 20 times [2021-06-05 15:20:27,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:20:27,590 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857869382] [2021-06-05 15:20:27,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:20:27,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:20:27,674 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:20:27,674 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:20:27,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857869382] [2021-06-05 15:20:27,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857869382] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:20:27,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285775313] [2021-06-05 15:20:27,675 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:20:27,704 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:20:27,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:20:27,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 15:20:27,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:20:27,862 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:20:27,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1285775313] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:20:27,863 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:20:27,863 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 15:20:27,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383183392] [2021-06-05 15:20:27,863 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 15:20:27,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:20:27,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 15:20:27,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-06-05 15:20:27,864 INFO L87 Difference]: Start difference. First operand 118442 states and 545327 transitions. Second operand has 17 states, 17 states have (on average 3.588235294117647) internal successors, (61), 16 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:20:28,690 WARN L205 SmtUtils]: Spent 576.00 ms on a formula simplification that was a NOOP. DAG size: 9 [2021-06-05 15:20:30,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:20:30,787 INFO L93 Difference]: Finished difference Result 221192 states and 968042 transitions. [2021-06-05 15:20:30,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 15:20:30,788 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.588235294117647) internal successors, (61), 16 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 15:20:30,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:20:31,688 INFO L225 Difference]: With dead ends: 221192 [2021-06-05 15:20:31,688 INFO L226 Difference]: Without dead ends: 221192 [2021-06-05 15:20:31,688 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 1036.3ms TimeCoverageRelationStatistics Valid=414, Invalid=1068, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 15:20:31,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221192 states. [2021-06-05 15:20:36,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221192 to 115584. [2021-06-05 15:20:36,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115584 states, 115583 states have (on average 4.562331830805569) internal successors, (527328), 115583 states have internal predecessors, (527328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:20:37,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115584 states to 115584 states and 527328 transitions. [2021-06-05 15:20:37,822 INFO L78 Accepts]: Start accepts. Automaton has 115584 states and 527328 transitions. Word has length 36 [2021-06-05 15:20:37,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:20:37,823 INFO L482 AbstractCegarLoop]: Abstraction has 115584 states and 527328 transitions. [2021-06-05 15:20:37,823 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.588235294117647) internal successors, (61), 16 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:20:37,823 INFO L276 IsEmpty]: Start isEmpty. Operand 115584 states and 527328 transitions. [2021-06-05 15:20:38,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:20:38,082 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:20:38,082 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:20:38,283 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-06-05 15:20:38,283 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:20:38,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:20:38,283 INFO L82 PathProgramCache]: Analyzing trace with hash -2125183306, now seen corresponding path program 21 times [2021-06-05 15:20:38,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:20:38,285 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232118863] [2021-06-05 15:20:38,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:20:38,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:20:38,395 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:20:38,396 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:20:38,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232118863] [2021-06-05 15:20:38,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232118863] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:20:38,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094740516] [2021-06-05 15:20:38,396 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:20:38,440 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:20:38,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:20:38,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 15:20:38,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:20:38,582 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:20:38,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1094740516] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:20:38,583 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:20:38,583 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-06-05 15:20:38,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868428108] [2021-06-05 15:20:38,583 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 15:20:38,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:20:38,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 15:20:38,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-06-05 15:20:38,584 INFO L87 Difference]: Start difference. First operand 115584 states and 527328 transitions. Second operand has 16 states, 16 states have (on average 3.6875) internal successors, (59), 15 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:20:40,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:20:40,874 INFO L93 Difference]: Finished difference Result 149434 states and 659887 transitions. [2021-06-05 15:20:40,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 15:20:40,874 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.6875) internal successors, (59), 15 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 15:20:40,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:20:41,914 INFO L225 Difference]: With dead ends: 149434 [2021-06-05 15:20:41,915 INFO L226 Difference]: Without dead ends: 149030 [2021-06-05 15:20:41,916 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 440.8ms TimeCoverageRelationStatistics Valid=318, Invalid=1014, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:20:42,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149030 states. [2021-06-05 15:20:45,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149030 to 114434. [2021-06-05 15:20:45,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114434 states, 114433 states have (on average 4.564548687878497) internal successors, (522335), 114433 states have internal predecessors, (522335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:20:46,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114434 states to 114434 states and 522335 transitions. [2021-06-05 15:20:46,714 INFO L78 Accepts]: Start accepts. Automaton has 114434 states and 522335 transitions. Word has length 36 [2021-06-05 15:20:46,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:20:46,714 INFO L482 AbstractCegarLoop]: Abstraction has 114434 states and 522335 transitions. [2021-06-05 15:20:46,714 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.6875) internal successors, (59), 15 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:20:46,714 INFO L276 IsEmpty]: Start isEmpty. Operand 114434 states and 522335 transitions. [2021-06-05 15:20:46,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:20:46,921 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:20:46,921 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:20:47,124 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:20:47,125 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:20:47,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:20:47,125 INFO L82 PathProgramCache]: Analyzing trace with hash 1698176276, now seen corresponding path program 22 times [2021-06-05 15:20:47,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:20:47,126 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836501656] [2021-06-05 15:20:47,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:20:47,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:20:47,180 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:20:47,180 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:20:47,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836501656] [2021-06-05 15:20:47,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836501656] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:20:47,180 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263518582] [2021-06-05 15:20:47,180 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:20:47,221 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:20:47,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:20:47,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 15:20:47,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:20:47,361 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:20:47,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1263518582] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:20:47,362 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:20:47,362 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-06-05 15:20:47,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992138541] [2021-06-05 15:20:47,362 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 15:20:47,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:20:47,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 15:20:47,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-06-05 15:20:47,362 INFO L87 Difference]: Start difference. First operand 114434 states and 522335 transitions. Second operand has 16 states, 16 states have (on average 3.8125) internal successors, (61), 15 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:20:50,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:20:50,448 INFO L93 Difference]: Finished difference Result 262218 states and 1170693 transitions. [2021-06-05 15:20:50,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 15:20:50,448 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.8125) internal successors, (61), 15 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 15:20:50,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:20:51,746 INFO L225 Difference]: With dead ends: 262218 [2021-06-05 15:20:51,746 INFO L226 Difference]: Without dead ends: 262218 [2021-06-05 15:20:51,747 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 453.1ms TimeCoverageRelationStatistics Valid=520, Invalid=1202, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 15:20:52,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262218 states. [2021-06-05 15:20:58,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262218 to 187390. [2021-06-05 15:20:59,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187390 states, 187389 states have (on average 4.617053295550966) internal successors, (865185), 187389 states have internal predecessors, (865185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:21:00,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187390 states to 187390 states and 865185 transitions. [2021-06-05 15:21:00,255 INFO L78 Accepts]: Start accepts. Automaton has 187390 states and 865185 transitions. Word has length 36 [2021-06-05 15:21:00,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:21:00,255 INFO L482 AbstractCegarLoop]: Abstraction has 187390 states and 865185 transitions. [2021-06-05 15:21:00,255 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.8125) internal successors, (61), 15 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:21:00,255 INFO L276 IsEmpty]: Start isEmpty. Operand 187390 states and 865185 transitions. [2021-06-05 15:21:00,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:21:00,544 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:21:00,544 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:21:00,745 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-06-05 15:21:00,746 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:21:00,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:21:00,746 INFO L82 PathProgramCache]: Analyzing trace with hash -52256758, now seen corresponding path program 23 times [2021-06-05 15:21:00,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:21:00,746 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654419236] [2021-06-05 15:21:00,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:21:00,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:21:00,786 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:21:00,786 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:21:00,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654419236] [2021-06-05 15:21:00,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654419236] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:21:00,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264212319] [2021-06-05 15:21:00,787 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:21:00,815 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 15:21:00,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:21:00,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 15:21:00,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:21:01,742 WARN L205 SmtUtils]: Spent 837.00 ms on a formula simplification that was a NOOP. DAG size: 15 [2021-06-05 15:21:01,781 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:21:01,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1264212319] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:21:01,781 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:21:01,782 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 14 [2021-06-05 15:21:01,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575980917] [2021-06-05 15:21:01,782 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 15:21:01,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:21:01,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 15:21:01,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-06-05 15:21:01,783 INFO L87 Difference]: Start difference. First operand 187390 states and 865185 transitions. Second operand has 15 states, 15 states have (on average 3.8) internal successors, (57), 14 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:21:04,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:21:04,174 INFO L93 Difference]: Finished difference Result 254683 states and 1137807 transitions. [2021-06-05 15:21:04,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 15:21:04,175 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.8) internal successors, (57), 14 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 15:21:04,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:21:05,240 INFO L225 Difference]: With dead ends: 254683 [2021-06-05 15:21:05,240 INFO L226 Difference]: Without dead ends: 254373 [2021-06-05 15:21:05,241 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 331.3ms TimeCoverageRelationStatistics Valid=342, Invalid=848, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 15:21:06,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254373 states. [2021-06-05 15:21:12,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254373 to 187000. [2021-06-05 15:21:12,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187000 states, 186999 states have (on average 4.611853539323739) internal successors, (862412), 186999 states have internal predecessors, (862412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:21:14,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187000 states to 187000 states and 862412 transitions. [2021-06-05 15:21:14,115 INFO L78 Accepts]: Start accepts. Automaton has 187000 states and 862412 transitions. Word has length 36 [2021-06-05 15:21:14,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:21:14,115 INFO L482 AbstractCegarLoop]: Abstraction has 187000 states and 862412 transitions. [2021-06-05 15:21:14,115 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.8) internal successors, (57), 14 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:21:14,115 INFO L276 IsEmpty]: Start isEmpty. Operand 187000 states and 862412 transitions. [2021-06-05 15:21:14,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:21:14,484 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:21:14,484 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:21:14,684 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:21:14,684 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:21:14,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:21:14,685 INFO L82 PathProgramCache]: Analyzing trace with hash 1154614392, now seen corresponding path program 24 times [2021-06-05 15:21:14,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:21:14,685 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79314519] [2021-06-05 15:21:14,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:21:14,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:21:14,735 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:21:14,735 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:21:14,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79314519] [2021-06-05 15:21:14,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79314519] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:21:14,735 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318642452] [2021-06-05 15:21:14,735 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:21:14,765 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 15:21:14,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:21:14,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 15:21:14,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:21:14,894 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:21:14,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [318642452] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:21:14,895 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:21:14,895 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-06-05 15:21:14,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307550287] [2021-06-05 15:21:14,895 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 15:21:14,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:21:14,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 15:21:14,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-06-05 15:21:14,896 INFO L87 Difference]: Start difference. First operand 187000 states and 862412 transitions. Second operand has 16 states, 16 states have (on average 3.5625) internal successors, (57), 15 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:21:17,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:21:17,547 INFO L93 Difference]: Finished difference Result 283294 states and 1263502 transitions. [2021-06-05 15:21:17,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 15:21:17,548 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 15 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 15:21:17,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:21:19,591 INFO L225 Difference]: With dead ends: 283294 [2021-06-05 15:21:19,592 INFO L226 Difference]: Without dead ends: 282784 [2021-06-05 15:21:19,592 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 389.4ms TimeCoverageRelationStatistics Valid=404, Invalid=1078, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 15:21:19,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282784 states. [2021-06-05 15:21:27,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282784 to 207055. [2021-06-05 15:21:27,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207055 states, 207054 states have (on average 4.6254455359471445) internal successors, (957717), 207054 states have internal predecessors, (957717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:21:29,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207055 states to 207055 states and 957717 transitions. [2021-06-05 15:21:29,210 INFO L78 Accepts]: Start accepts. Automaton has 207055 states and 957717 transitions. Word has length 36 [2021-06-05 15:21:29,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:21:29,210 INFO L482 AbstractCegarLoop]: Abstraction has 207055 states and 957717 transitions. [2021-06-05 15:21:29,210 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 15 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:21:29,211 INFO L276 IsEmpty]: Start isEmpty. Operand 207055 states and 957717 transitions. [2021-06-05 15:21:29,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-06-05 15:21:29,584 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:21:29,584 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:21:29,784 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-06-05 15:21:29,785 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:21:29,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:21:29,785 INFO L82 PathProgramCache]: Analyzing trace with hash 333714932, now seen corresponding path program 25 times [2021-06-05 15:21:29,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:21:29,785 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083012210] [2021-06-05 15:21:29,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:21:29,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:21:29,844 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:21:29,844 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:21:29,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083012210] [2021-06-05 15:21:29,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083012210] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:21:29,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923402891] [2021-06-05 15:21:29,844 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:21:29,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:21:29,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 15:21:29,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:21:30,014 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:21:30,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1923402891] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:21:30,014 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:21:30,014 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 15:21:30,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751917520] [2021-06-05 15:21:30,015 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 15:21:30,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:21:30,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 15:21:30,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-06-05 15:21:30,015 INFO L87 Difference]: Start difference. First operand 207055 states and 957717 transitions. Second operand has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 16 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:21:33,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:21:33,457 INFO L93 Difference]: Finished difference Result 290122 states and 1295399 transitions. [2021-06-05 15:21:33,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 15:21:33,457 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 16 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-06-05 15:21:33,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:21:34,848 INFO L225 Difference]: With dead ends: 290122 [2021-06-05 15:21:34,848 INFO L226 Difference]: Without dead ends: 289652 [2021-06-05 15:21:34,849 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 632 ImplicationChecksByTransitivity, 547.8ms TimeCoverageRelationStatistics Valid=575, Invalid=1587, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 15:21:35,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289652 states. [2021-06-05 15:21:42,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289652 to 218816. [2021-06-05 15:21:43,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218816 states, 218815 states have (on average 4.624737792198889) internal successors, (1011962), 218815 states have internal predecessors, (1011962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:21:45,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218816 states to 218816 states and 1011962 transitions. [2021-06-05 15:21:45,505 INFO L78 Accepts]: Start accepts. Automaton has 218816 states and 1011962 transitions. Word has length 36 [2021-06-05 15:21:45,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:21:45,505 INFO L482 AbstractCegarLoop]: Abstraction has 218816 states and 1011962 transitions. [2021-06-05 15:21:45,506 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 16 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:21:45,506 INFO L276 IsEmpty]: Start isEmpty. Operand 218816 states and 1011962 transitions. [2021-06-05 15:21:46,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 15:21:46,296 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:21:46,296 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:21:46,508 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-06-05 15:21:46,509 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:21:46,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:21:46,509 INFO L82 PathProgramCache]: Analyzing trace with hash 699829746, now seen corresponding path program 26 times [2021-06-05 15:21:46,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:21:46,509 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952592463] [2021-06-05 15:21:46,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:21:46,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:21:46,609 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:21:46,610 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:21:46,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952592463] [2021-06-05 15:21:46,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1952592463] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:21:46,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515390299] [2021-06-05 15:21:46,610 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:21:46,740 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:21:46,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:21:46,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 15:21:46,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:21:46,928 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:21:46,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [515390299] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:21:46,929 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:21:46,929 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10] total 14 [2021-06-05 15:21:46,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390666566] [2021-06-05 15:21:46,929 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 15:21:46,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:21:46,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 15:21:46,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-06-05 15:21:46,930 INFO L87 Difference]: Start difference. First operand 218816 states and 1011962 transitions. Second operand has 14 states, 14 states have (on average 5.0) internal successors, (70), 14 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:21:50,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:21:50,635 INFO L93 Difference]: Finished difference Result 275767 states and 1260077 transitions. [2021-06-05 15:21:50,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 15:21:50,635 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.0) internal successors, (70), 14 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-05 15:21:50,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:21:53,364 INFO L225 Difference]: With dead ends: 275767 [2021-06-05 15:21:53,365 INFO L226 Difference]: Without dead ends: 274998 [2021-06-05 15:21:53,365 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 147.1ms TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-06-05 15:21:53,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274998 states. [2021-06-05 15:22:01,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274998 to 238003. [2021-06-05 15:22:01,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238003 states, 238002 states have (on average 4.6232090486634565) internal successors, (1100333), 238002 states have internal predecessors, (1100333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:22:04,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238003 states to 238003 states and 1100333 transitions. [2021-06-05 15:22:04,045 INFO L78 Accepts]: Start accepts. Automaton has 238003 states and 1100333 transitions. Word has length 38 [2021-06-05 15:22:04,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:22:04,045 INFO L482 AbstractCegarLoop]: Abstraction has 238003 states and 1100333 transitions. [2021-06-05 15:22:04,045 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.0) internal successors, (70), 14 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:22:04,045 INFO L276 IsEmpty]: Start isEmpty. Operand 238003 states and 1100333 transitions. [2021-06-05 15:22:04,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 15:22:04,513 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:22:04,513 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:22:04,713 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-06-05 15:22:04,713 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:22:04,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:22:04,714 INFO L82 PathProgramCache]: Analyzing trace with hash -741519670, now seen corresponding path program 27 times [2021-06-05 15:22:04,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:22:04,714 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481330692] [2021-06-05 15:22:04,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:22:04,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:22:04,764 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 15:22:04,764 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:22:04,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481330692] [2021-06-05 15:22:04,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481330692] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:22:04,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972904179] [2021-06-05 15:22:04,764 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:22:04,794 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 15:22:04,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:22:04,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 15:22:04,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:22:04,919 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:22:04,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1972904179] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:22:04,920 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:22:04,920 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10] total 14 [2021-06-05 15:22:04,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578008298] [2021-06-05 15:22:04,920 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 15:22:04,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:22:04,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 15:22:04,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-06-05 15:22:04,921 INFO L87 Difference]: Start difference. First operand 238003 states and 1100333 transitions. Second operand has 14 states, 14 states have (on average 5.0) internal successors, (70), 14 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:22:08,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:22:08,799 INFO L93 Difference]: Finished difference Result 394201 states and 1792824 transitions. [2021-06-05 15:22:08,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 15:22:08,800 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.0) internal successors, (70), 14 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-05 15:22:08,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:22:11,528 INFO L225 Difference]: With dead ends: 394201 [2021-06-05 15:22:11,529 INFO L226 Difference]: Without dead ends: 392734 [2021-06-05 15:22:11,529 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 108.8ms TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-06-05 15:22:12,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392734 states. [2021-06-05 15:22:22,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392734 to 306278. [2021-06-05 15:22:23,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306278 states, 306277 states have (on average 4.624082121739471) internal successors, (1416250), 306277 states have internal predecessors, (1416250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:22:25,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306278 states to 306278 states and 1416250 transitions. [2021-06-05 15:22:25,777 INFO L78 Accepts]: Start accepts. Automaton has 306278 states and 1416250 transitions. Word has length 38 [2021-06-05 15:22:25,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:22:25,777 INFO L482 AbstractCegarLoop]: Abstraction has 306278 states and 1416250 transitions. [2021-06-05 15:22:25,777 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.0) internal successors, (70), 14 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:22:25,777 INFO L276 IsEmpty]: Start isEmpty. Operand 306278 states and 1416250 transitions. [2021-06-05 15:22:27,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 15:22:27,325 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:22:27,325 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:22:27,540 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-06-05 15:22:27,541 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:22:27,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:22:27,541 INFO L82 PathProgramCache]: Analyzing trace with hash 1495021836, now seen corresponding path program 1 times [2021-06-05 15:22:27,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:22:27,541 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251271954] [2021-06-05 15:22:27,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:22:27,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:22:27,599 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:22:27,600 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:22:27,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251271954] [2021-06-05 15:22:27,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251271954] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:22:27,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976268340] [2021-06-05 15:22:27,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:22:27,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:22:27,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 15:22:27,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:22:27,762 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:22:27,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [976268340] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:22:27,763 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:22:27,763 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10] total 15 [2021-06-05 15:22:27,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45638523] [2021-06-05 15:22:27,763 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 15:22:27,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:22:27,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 15:22:27,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-06-05 15:22:27,763 INFO L87 Difference]: Start difference. First operand 306278 states and 1416250 transitions. Second operand has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:22:35,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:22:35,529 INFO L93 Difference]: Finished difference Result 586179 states and 2672233 transitions. [2021-06-05 15:22:35,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 15:22:35,529 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-05 15:22:35,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:22:40,206 INFO L225 Difference]: With dead ends: 586179 [2021-06-05 15:22:40,206 INFO L226 Difference]: Without dead ends: 583951 [2021-06-05 15:22:40,207 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 117.2ms TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-06-05 15:22:41,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583951 states. [2021-06-05 15:22:57,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583951 to 425975. [2021-06-05 15:22:58,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 425975 states, 425974 states have (on average 4.631465770211327) internal successors, (1972884), 425974 states have internal predecessors, (1972884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:23:01,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425975 states to 425975 states and 1972884 transitions. [2021-06-05 15:23:01,474 INFO L78 Accepts]: Start accepts. Automaton has 425975 states and 1972884 transitions. Word has length 38 [2021-06-05 15:23:01,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:23:01,474 INFO L482 AbstractCegarLoop]: Abstraction has 425975 states and 1972884 transitions. [2021-06-05 15:23:01,474 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.866666666666666) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:23:01,474 INFO L276 IsEmpty]: Start isEmpty. Operand 425975 states and 1972884 transitions. [2021-06-05 15:23:03,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 15:23:03,132 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:23:03,132 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:23:03,344 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-06-05 15:23:03,345 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:23:03,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:23:03,345 INFO L82 PathProgramCache]: Analyzing trace with hash -1674170670, now seen corresponding path program 28 times [2021-06-05 15:23:03,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:23:03,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144094456] [2021-06-05 15:23:03,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:23:03,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:23:03,395 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 15:23:03,395 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:23:03,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144094456] [2021-06-05 15:23:03,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144094456] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:23:03,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441696954] [2021-06-05 15:23:03,396 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:23:03,432 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:23:03,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:23:03,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 17 conjunts are in the unsatisfiable core [2021-06-05 15:23:03,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:23:03,577 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:23:03,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1441696954] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:23:03,577 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:23:03,577 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10] total 14 [2021-06-05 15:23:03,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006273644] [2021-06-05 15:23:03,578 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 15:23:03,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:23:03,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 15:23:03,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 15:23:03,579 INFO L87 Difference]: Start difference. First operand 425975 states and 1972884 transitions. Second operand has 14 states, 14 states have (on average 5.0) internal successors, (70), 14 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:23:09,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:23:09,734 INFO L93 Difference]: Finished difference Result 560533 states and 2590081 transitions. [2021-06-05 15:23:09,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 15:23:09,734 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.0) internal successors, (70), 14 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-06-05 15:23:09,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:23:13,457 INFO L225 Difference]: With dead ends: 560533 [2021-06-05 15:23:13,457 INFO L226 Difference]: Without dead ends: 559708 [2021-06-05 15:23:13,457 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 112.1ms TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-06-05 15:23:14,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559708 states. [2021-06-05 15:23:33,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559708 to 545995. [2021-06-05 15:23:33,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 545995 states, 545994 states have (on average 4.646322120755905) internal successors, (2536864), 545994 states have internal predecessors, (2536864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:23:40,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 545995 states to 545995 states and 2536864 transitions. [2021-06-05 15:23:40,920 INFO L78 Accepts]: Start accepts. Automaton has 545995 states and 2536864 transitions. Word has length 38 [2021-06-05 15:23:40,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:23:40,920 INFO L482 AbstractCegarLoop]: Abstraction has 545995 states and 2536864 transitions. [2021-06-05 15:23:40,921 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.0) internal successors, (70), 14 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:23:40,921 INFO L276 IsEmpty]: Start isEmpty. Operand 545995 states and 2536864 transitions. [2021-06-05 15:23:44,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 15:23:44,010 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:23:44,010 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:23:44,211 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:23:44,211 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:23:44,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:23:44,211 INFO L82 PathProgramCache]: Analyzing trace with hash -1628737040, now seen corresponding path program 29 times [2021-06-05 15:23:44,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:23:44,212 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470806207] [2021-06-05 15:23:44,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:23:44,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:23:44,351 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:23:44,351 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:23:44,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470806207] [2021-06-05 15:23:44,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470806207] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:23:44,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532019798] [2021-06-05 15:23:44,351 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:23:44,389 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 15:23:44,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:23:44,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 15:23:44,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:23:44,605 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:23:44,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1532019798] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:23:44,606 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:23:44,606 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-06-05 15:23:44,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459167217] [2021-06-05 15:23:44,606 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-06-05 15:23:44,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:23:44,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-06-05 15:23:44,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2021-06-05 15:23:44,607 INFO L87 Difference]: Start difference. First operand 545995 states and 2536864 transitions. Second operand has 22 states, 22 states have (on average 3.1818181818181817) internal successors, (70), 21 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:23:56,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:23:56,219 INFO L93 Difference]: Finished difference Result 810316 states and 3662784 transitions. [2021-06-05 15:23:56,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 15:23:56,219 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.1818181818181817) internal successors, (70), 21 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 15:23:56,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:24:04,870 INFO L225 Difference]: With dead ends: 810316 [2021-06-05 15:24:04,870 INFO L226 Difference]: Without dead ends: 810316 [2021-06-05 15:24:04,871 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 666 ImplicationChecksByTransitivity, 805.9ms TimeCoverageRelationStatistics Valid=757, Invalid=2105, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 15:24:07,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 810316 states. [2021-06-05 15:24:32,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 810316 to 534782. [2021-06-05 15:24:33,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 534782 states, 534781 states have (on average 4.638676392766385) internal successors, (2480676), 534781 states have internal predecessors, (2480676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:24:38,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 534782 states to 534782 states and 2480676 transitions. [2021-06-05 15:24:38,501 INFO L78 Accepts]: Start accepts. Automaton has 534782 states and 2480676 transitions. Word has length 40 [2021-06-05 15:24:38,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:24:38,501 INFO L482 AbstractCegarLoop]: Abstraction has 534782 states and 2480676 transitions. [2021-06-05 15:24:38,501 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 3.1818181818181817) internal successors, (70), 21 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:24:38,501 INFO L276 IsEmpty]: Start isEmpty. Operand 534782 states and 2480676 transitions. [2021-06-05 15:24:40,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 15:24:40,515 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:24:40,515 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:24:40,716 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-06-05 15:24:40,716 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:24:40,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:24:40,720 INFO L82 PathProgramCache]: Analyzing trace with hash -804307532, now seen corresponding path program 30 times [2021-06-05 15:24:40,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:24:40,720 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416186423] [2021-06-05 15:24:40,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:24:40,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:24:40,795 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:24:40,795 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:24:40,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416186423] [2021-06-05 15:24:40,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416186423] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:24:40,795 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171556910] [2021-06-05 15:24:40,795 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:24:40,833 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 15:24:40,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:24:40,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 15:24:40,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:24:41,027 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:24:41,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1171556910] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:24:41,027 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:24:41,027 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-06-05 15:24:41,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929333684] [2021-06-05 15:24:41,028 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 15:24:41,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:24:41,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 15:24:41,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:24:41,028 INFO L87 Difference]: Start difference. First operand 534782 states and 2480676 transitions. Second operand has 21 states, 21 states have (on average 3.238095238095238) internal successors, (68), 20 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:24:58,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:24:58,408 INFO L93 Difference]: Finished difference Result 1136355 states and 5157666 transitions. [2021-06-05 15:24:58,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-05 15:24:58,409 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.238095238095238) internal successors, (68), 20 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-06-05 15:24:58,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:25:06,695 INFO L225 Difference]: With dead ends: 1136355 [2021-06-05 15:25:06,695 INFO L226 Difference]: Without dead ends: 1133906 [2021-06-05 15:25:06,696 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1662 ImplicationChecksByTransitivity, 1245.2ms TimeCoverageRelationStatistics Valid=1280, Invalid=3976, Unknown=0, NotChecked=0, Total=5256 [2021-06-05 15:25:08,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1133906 states. [2021-06-05 15:25:51,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1133906 to 706666. [2021-06-05 15:25:52,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 706666 states, 706665 states have (on average 4.660015707584216) internal successors, (3293070), 706665 states have internal predecessors, (3293070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:26:02,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 706666 states to 706666 states and 3293070 transitions. [2021-06-05 15:26:02,220 INFO L78 Accepts]: Start accepts. Automaton has 706666 states and 3293070 transitions. Word has length 40 [2021-06-05 15:26:02,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:26:02,220 INFO L482 AbstractCegarLoop]: Abstraction has 706666 states and 3293070 transitions. [2021-06-05 15:26:02,220 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.238095238095238) internal successors, (68), 20 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:26:02,220 INFO L276 IsEmpty]: Start isEmpty. Operand 706666 states and 3293070 transitions. [2021-06-05 15:26:05,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-06-05 15:26:05,019 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:26:05,019 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:26:05,232 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-06-05 15:26:05,233 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:26:05,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:26:05,233 INFO L82 PathProgramCache]: Analyzing trace with hash -1830337484, now seen corresponding path program 31 times [2021-06-05 15:26:05,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:26:05,233 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28108100] [2021-06-05 15:26:05,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:26:05,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:26:05,303 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:26:05,304 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:26:05,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28108100] [2021-06-05 15:26:05,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28108100] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:26:05,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146833070] [2021-06-05 15:26:05,304 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:26:05,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:26:05,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 15:26:05,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:26:05,540 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:26:05,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146833070] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:26:05,540 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:26:05,540 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 17 [2021-06-05 15:26:05,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451739593] [2021-06-05 15:26:05,540 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 15:26:05,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:26:05,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 15:26:05,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-06-05 15:26:05,541 INFO L87 Difference]: Start difference. First operand 706666 states and 3293070 transitions. Second operand has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 17 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)