/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/test/context1.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-29289db [2021-06-05 17:06:17,789 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 17:06:17,790 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 17:06:17,820 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 17:06:17,861 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 17:06:17,888 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 17:06:17,889 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 17:06:17,889 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 17:06:17,889 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 17:06:17,891 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 17:06:17,891 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 17:06:17,891 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 17:06:17,891 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 17:06:17,891 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 17:06:17,891 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 17:06:17,892 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 17:06:17,892 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 17:06:17,892 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 17:06:17,892 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 17:06:17,892 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 17:06:17,892 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 17:06:17,892 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 17:06:17,893 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 17:06:17,893 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 17:06:17,893 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 17:06:17,893 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 17:06:17,893 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 17:06:17,893 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 17:06:17,893 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 17:06:17,893 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 17:06:17,893 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 17:06:17,893 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 17:06:17,893 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 17:06:17,894 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 17:06:17,894 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 17:06:17,894 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 17:06:17,894 INFO L138 SettingsManager]: * Check the insufficient thread errors last=true [2021-06-05 17:06:17,894 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 17:06:18,149 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 17:06:18,168 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 17:06:18,170 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 17:06:18,170 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 17:06:18,171 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 17:06:18,172 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/test/context1.wvr.bpl [2021-06-05 17:06:18,189 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/test/context1.wvr.bpl' [2021-06-05 17:06:18,212 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 17:06:18,213 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 17:06:18,216 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 17:06:18,217 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 17:06:18,217 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 17:06:18,224 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "context1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:06:18" (1/1) ... [2021-06-05 17:06:18,230 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "context1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:06:18" (1/1) ... [2021-06-05 17:06:18,235 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 17:06:18,236 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 17:06:18,237 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 17:06:18,237 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 17:06:18,242 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "context1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:06:18" (1/1) ... [2021-06-05 17:06:18,242 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "context1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:06:18" (1/1) ... [2021-06-05 17:06:18,243 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "context1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:06:18" (1/1) ... [2021-06-05 17:06:18,243 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "context1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:06:18" (1/1) ... [2021-06-05 17:06:18,245 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "context1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:06:18" (1/1) ... [2021-06-05 17:06:18,246 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "context1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:06:18" (1/1) ... [2021-06-05 17:06:18,246 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "context1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:06:18" (1/1) ... [2021-06-05 17:06:18,247 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 17:06:18,248 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 17:06:18,248 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 17:06:18,248 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 17:06:18,249 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "context1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:06:18" (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 17:06:18,294 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 17:06:18,294 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 17:06:18,294 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 17:06:18,294 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 17:06:18,294 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 17:06:18,294 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 17:06:18,295 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 17:06:18,295 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 17:06:18,295 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 17:06:18,297 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 17:06:18,456 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 17:06:18,456 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-06-05 17:06:18,456 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread1EXIT is neither atomic block end nor error location. [2021-06-05 17:06:18,457 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread2EXIT is neither atomic block end nor error location. [2021-06-05 17:06:18,458 INFO L202 PluginConnector]: Adding new model context1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 05:06:18 BoogieIcfgContainer [2021-06-05 17:06:18,458 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 17:06:18,463 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 17:06:18,463 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 17:06:18,465 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 17:06:18,465 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "context1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:06:18" (1/2) ... [2021-06-05 17:06:18,466 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50897956 and model type context1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 05:06:18, skipping insertion in model container [2021-06-05 17:06:18,467 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "context1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 05:06:18" (2/2) ... [2021-06-05 17:06:18,470 INFO L111 eAbstractionObserver]: Analyzing ICFG context1.wvr.bpl [2021-06-05 17:06:18,474 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 17:06:18,476 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 17:06:18,476 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 17:06:18,476 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 17:06:18,527 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-06-05 17:06:18,551 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-06-05 17:06:18,578 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 17:06:18,578 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 17:06:18,578 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 17:06:18,578 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 17:06:18,578 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 17:06:18,578 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 17:06:18,578 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 17:06:18,579 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 17:06:18,584 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 15 transitions, 46 flow [2021-06-05 17:06:18,591 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 15 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:18,592 INFO L276 IsEmpty]: Start isEmpty. Operand has 15 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:18,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-06-05 17:06:18,606 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:06:18,606 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:06:18,607 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:06:18,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:06:18,610 INFO L82 PathProgramCache]: Analyzing trace with hash -1225879624, now seen corresponding path program 1 times [2021-06-05 17:06:18,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:06:18,615 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888929624] [2021-06-05 17:06:18,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:06:18,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:06:18,705 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 17:06:18,706 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:06:18,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888929624] [2021-06-05 17:06:18,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888929624] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 17:06:18,707 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 17:06:18,707 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-05 17:06:18,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403244088] [2021-06-05 17:06:18,710 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 17:06:18,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:06:18,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 17:06:18,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 17:06:18,722 INFO L87 Difference]: Start difference. First operand has 15 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:18,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:06:18,741 INFO L93 Difference]: Finished difference Result 20 states and 34 transitions. [2021-06-05 17:06:18,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 17:06:18,743 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-06-05 17:06:18,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:06:18,751 INFO L225 Difference]: With dead ends: 20 [2021-06-05 17:06:18,751 INFO L226 Difference]: Without dead ends: 16 [2021-06-05 17:06:18,752 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 17:06:18,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-06-05 17:06:18,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-06-05 17:06:18,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.8) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:18,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 27 transitions. [2021-06-05 17:06:18,771 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 27 transitions. Word has length 9 [2021-06-05 17:06:18,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:06:18,771 INFO L482 AbstractCegarLoop]: Abstraction has 16 states and 27 transitions. [2021-06-05 17:06:18,771 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:18,772 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 27 transitions. [2021-06-05 17:06:18,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-06-05 17:06:18,772 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:06:18,772 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:06:18,773 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 17:06:18,773 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:06:18,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:06:18,777 INFO L82 PathProgramCache]: Analyzing trace with hash 653163243, now seen corresponding path program 1 times [2021-06-05 17:06:18,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:06:18,778 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166333530] [2021-06-05 17:06:18,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:06:18,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:06:18,812 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 17:06:18,813 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:06:18,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166333530] [2021-06-05 17:06:18,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166333530] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 17:06:18,813 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 17:06:18,813 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-05 17:06:18,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841475438] [2021-06-05 17:06:18,814 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 17:06:18,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:06:18,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 17:06:18,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 17:06:18,815 INFO L87 Difference]: Start difference. First operand 16 states and 27 transitions. Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:18,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:06:18,824 INFO L93 Difference]: Finished difference Result 21 states and 34 transitions. [2021-06-05 17:06:18,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 17:06:18,825 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-06-05 17:06:18,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:06:18,825 INFO L225 Difference]: With dead ends: 21 [2021-06-05 17:06:18,825 INFO L226 Difference]: Without dead ends: 18 [2021-06-05 17:06:18,826 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 17:06:18,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-06-05 17:06:18,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-06-05 17:06:18,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 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 17:06:18,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 30 transitions. [2021-06-05 17:06:18,828 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 30 transitions. Word has length 10 [2021-06-05 17:06:18,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:06:18,828 INFO L482 AbstractCegarLoop]: Abstraction has 18 states and 30 transitions. [2021-06-05 17:06:18,829 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:18,829 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 30 transitions. [2021-06-05 17:06:18,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-06-05 17:06:18,829 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:06:18,829 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:06:18,829 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-05 17:06:18,829 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:06:18,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:06:18,830 INFO L82 PathProgramCache]: Analyzing trace with hash -1382019562, now seen corresponding path program 1 times [2021-06-05 17:06:18,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:06:18,830 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591813442] [2021-06-05 17:06:18,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:06:18,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:06:18,859 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 17:06:18,859 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:06:18,859 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591813442] [2021-06-05 17:06:18,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591813442] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:18,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980157973] [2021-06-05 17:06:18,860 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 17:06:18,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:06:18,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 17:06:18,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:06:18,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 17:06:18,961 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:06:18,963 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:06:18,963 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:06:18,964 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-05 17:06:18,974 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 17:06:18,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980157973] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:18,977 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:06:18,977 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-06-05 17:06:18,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249463457] [2021-06-05 17:06:18,978 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 17:06:18,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:06:18,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 17:06:18,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 17:06:18,985 INFO L87 Difference]: Start difference. First operand 18 states and 30 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:19,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:06:19,021 INFO L93 Difference]: Finished difference Result 25 states and 43 transitions. [2021-06-05 17:06:19,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 17:06:19,022 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-06-05 17:06:19,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:06:19,032 INFO L225 Difference]: With dead ends: 25 [2021-06-05 17:06:19,032 INFO L226 Difference]: Without dead ends: 21 [2021-06-05 17:06:19,032 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 25.5ms TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-06-05 17:06:19,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-06-05 17:06:19,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-06-05 17:06:19,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.8) internal successors, (36), 20 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:19,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 36 transitions. [2021-06-05 17:06:19,037 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 36 transitions. Word has length 11 [2021-06-05 17:06:19,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:06:19,037 INFO L482 AbstractCegarLoop]: Abstraction has 21 states and 36 transitions. [2021-06-05 17:06:19,037 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:19,037 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 36 transitions. [2021-06-05 17:06:19,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-06-05 17:06:19,037 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:06:19,037 INFO L521 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:06:19,238 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-06-05 17:06:19,238 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:06:19,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:06:19,239 INFO L82 PathProgramCache]: Analyzing trace with hash 107792461, now seen corresponding path program 2 times [2021-06-05 17:06:19,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:06:19,239 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538055408] [2021-06-05 17:06:19,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:06:19,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:06:19,266 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:06:19,266 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:06:19,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538055408] [2021-06-05 17:06:19,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538055408] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:19,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867411571] [2021-06-05 17:06:19,266 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 17:06:19,300 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:06:19,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:06:19,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 17:06:19,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:06:19,337 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:06:19,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [867411571] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:19,337 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:06:19,338 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-06-05 17:06:19,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379164008] [2021-06-05 17:06:19,338 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 17:06:19,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:06:19,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 17:06:19,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 17:06:19,339 INFO L87 Difference]: Start difference. First operand 21 states and 36 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:19,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:06:19,350 INFO L93 Difference]: Finished difference Result 50 states and 82 transitions. [2021-06-05 17:06:19,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 17:06:19,351 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-06-05 17:06:19,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:06:19,352 INFO L225 Difference]: With dead ends: 50 [2021-06-05 17:06:19,352 INFO L226 Difference]: Without dead ends: 45 [2021-06-05 17:06:19,353 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.4ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-05 17:06:19,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-06-05 17:06:19,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 33. [2021-06-05 17:06:19,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.9375) internal successors, (62), 32 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 17:06:19,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 62 transitions. [2021-06-05 17:06:19,357 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 62 transitions. Word has length 12 [2021-06-05 17:06:19,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:06:19,357 INFO L482 AbstractCegarLoop]: Abstraction has 33 states and 62 transitions. [2021-06-05 17:06:19,357 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:19,357 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 62 transitions. [2021-06-05 17:06:19,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-06-05 17:06:19,358 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:06:19,358 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:06:19,558 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:06:19,559 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:06:19,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:06:19,559 INFO L82 PathProgramCache]: Analyzing trace with hash -1492763464, now seen corresponding path program 3 times [2021-06-05 17:06:19,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:06:19,559 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359804412] [2021-06-05 17:06:19,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:06:19,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:06:19,610 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:06:19,610 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:06:19,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359804412] [2021-06-05 17:06:19,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359804412] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:19,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505129827] [2021-06-05 17:06:19,610 INFO L93 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 17:06:19,659 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 17:06:19,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:06:19,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 11 conjunts are in the unsatisfiable core [2021-06-05 17:06:19,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:06:19,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 17:06:19,721 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:06:19,722 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:06:19,723 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:06:19,723 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-05 17:06:19,729 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:06:19,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1505129827] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:19,729 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:06:19,729 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-05 17:06:19,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806124748] [2021-06-05 17:06:19,729 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 17:06:19,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:06:19,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 17:06:19,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-05 17:06:19,730 INFO L87 Difference]: Start difference. First operand 33 states and 62 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:19,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:06:19,795 INFO L93 Difference]: Finished difference Result 65 states and 115 transitions. [2021-06-05 17:06:19,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 17:06:19,796 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-06-05 17:06:19,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:06:19,798 INFO L225 Difference]: With dead ends: 65 [2021-06-05 17:06:19,798 INFO L226 Difference]: Without dead ends: 39 [2021-06-05 17:06:19,798 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 56.2ms TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-06-05 17:06:19,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-06-05 17:06:19,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 26. [2021-06-05 17:06:19,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.84) internal successors, (46), 25 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:19,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 46 transitions. [2021-06-05 17:06:19,803 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 46 transitions. Word has length 13 [2021-06-05 17:06:19,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:06:19,803 INFO L482 AbstractCegarLoop]: Abstraction has 26 states and 46 transitions. [2021-06-05 17:06:19,803 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:19,803 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 46 transitions. [2021-06-05 17:06:19,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-06-05 17:06:19,804 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:06:19,804 INFO L521 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:06:20,004 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:06:20,005 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:06:20,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:06:20,005 INFO L82 PathProgramCache]: Analyzing trace with hash 969698795, now seen corresponding path program 4 times [2021-06-05 17:06:20,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:06:20,005 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166194736] [2021-06-05 17:06:20,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:06:20,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:06:20,036 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:06:20,036 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:06:20,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166194736] [2021-06-05 17:06:20,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166194736] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:20,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128192874] [2021-06-05 17:06:20,036 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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 17:06:20,067 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:06:20,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:06:20,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 17:06:20,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:06:20,107 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:06:20,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [128192874] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:20,107 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:06:20,107 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-06-05 17:06:20,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281816141] [2021-06-05 17:06:20,108 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 17:06:20,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:06:20,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 17:06:20,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-05 17:06:20,108 INFO L87 Difference]: Start difference. First operand 26 states and 46 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:20,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:06:20,117 INFO L93 Difference]: Finished difference Result 73 states and 125 transitions. [2021-06-05 17:06:20,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 17:06:20,117 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-06-05 17:06:20,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:06:20,118 INFO L225 Difference]: With dead ends: 73 [2021-06-05 17:06:20,118 INFO L226 Difference]: Without dead ends: 66 [2021-06-05 17:06:20,118 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.6ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-05 17:06:20,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-06-05 17:06:20,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 48. [2021-06-05 17:06:20,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 2.021276595744681) internal successors, (95), 47 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:20,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 95 transitions. [2021-06-05 17:06:20,122 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 95 transitions. Word has length 14 [2021-06-05 17:06:20,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:06:20,122 INFO L482 AbstractCegarLoop]: Abstraction has 48 states and 95 transitions. [2021-06-05 17:06:20,122 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:20,122 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 95 transitions. [2021-06-05 17:06:20,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 17:06:20,123 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:06:20,123 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:06:20,324 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:06:20,325 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:06:20,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:06:20,325 INFO L82 PathProgramCache]: Analyzing trace with hash 433746838, now seen corresponding path program 5 times [2021-06-05 17:06:20,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:06:20,325 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705280761] [2021-06-05 17:06:20,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:06:20,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:06:20,401 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:06:20,401 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:06:20,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705280761] [2021-06-05 17:06:20,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705280761] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:20,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200164541] [2021-06-05 17:06:20,401 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 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 17:06:20,435 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 17:06:20,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:06:20,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 17:06:20,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:06:24,720 INFO L354 Elim1Store]: treesize reduction 8, result has 27.3 percent of original size [2021-06-05 17:06:24,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 10 [2021-06-05 17:06:24,721 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:06:24,726 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:06:24,727 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:06:24,728 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:20, output treesize:3 [2021-06-05 17:06:24,732 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 9 refuted. 2 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:06:24,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [200164541] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:24,732 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:06:24,733 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-05 17:06:24,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458522390] [2021-06-05 17:06:24,733 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 17:06:24,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:06:24,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 17:06:24,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=168, Unknown=2, NotChecked=0, Total=210 [2021-06-05 17:06:24,733 INFO L87 Difference]: Start difference. First operand 48 states and 95 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 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 17:06:27,096 WARN L205 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 26 [2021-06-05 17:06:31,004 WARN L205 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 25 [2021-06-05 17:06:35,089 WARN L205 SmtUtils]: Spent 2.02 s on a formula simplification that was a NOOP. DAG size: 24 [2021-06-05 17:06:45,155 WARN L205 SmtUtils]: Spent 2.01 s on a formula simplification that was a NOOP. DAG size: 23 [2021-06-05 17:06:45,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:06:45,190 INFO L93 Difference]: Finished difference Result 229 states and 428 transitions. [2021-06-05 17:06:45,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 17:06:45,190 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 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 15 [2021-06-05 17:06:45,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:06:45,191 INFO L225 Difference]: With dead ends: 229 [2021-06-05 17:06:45,191 INFO L226 Difference]: Without dead ends: 116 [2021-06-05 17:06:45,191 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 24473.0ms TimeCoverageRelationStatistics Valid=229, Invalid=821, Unknown=6, NotChecked=0, Total=1056 [2021-06-05 17:06:45,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-06-05 17:06:45,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 56. [2021-06-05 17:06:45,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 2.0545454545454547) internal successors, (113), 55 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:45,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 113 transitions. [2021-06-05 17:06:45,197 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 113 transitions. Word has length 15 [2021-06-05 17:06:45,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:06:45,197 INFO L482 AbstractCegarLoop]: Abstraction has 56 states and 113 transitions. [2021-06-05 17:06:45,197 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 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 17:06:45,198 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 113 transitions. [2021-06-05 17:06:45,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 17:06:45,198 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:06:45,198 INFO L521 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:06:45,414 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-06-05 17:06:45,414 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:06:45,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:06:45,415 INFO L82 PathProgramCache]: Analyzing trace with hash 908220856, now seen corresponding path program 6 times [2021-06-05 17:06:45,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:06:45,415 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940634681] [2021-06-05 17:06:45,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:06:45,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:06:45,503 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:06:45,504 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:06:45,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940634681] [2021-06-05 17:06:45,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940634681] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:45,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110114784] [2021-06-05 17:06:45,504 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 17:06:45,534 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 17:06:45,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:06:45,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 17:06:45,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:06:45,586 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 17:06:45,588 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:06:45,589 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:06:45,590 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:06:45,590 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-05 17:06:45,595 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:06:45,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [110114784] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:45,595 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:06:45,595 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 17:06:45,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726815529] [2021-06-05 17:06:45,595 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 17:06:45,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:06:45,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 17:06:45,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-06-05 17:06:45,596 INFO L87 Difference]: Start difference. First operand 56 states and 113 transitions. Second operand has 11 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 10 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:45,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:06:45,751 INFO L93 Difference]: Finished difference Result 121 states and 226 transitions. [2021-06-05 17:06:45,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 17:06:45,752 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 10 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 17:06:45,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:06:45,753 INFO L225 Difference]: With dead ends: 121 [2021-06-05 17:06:45,753 INFO L226 Difference]: Without dead ends: 77 [2021-06-05 17:06:45,753 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 154.9ms TimeCoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-06-05 17:06:45,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-06-05 17:06:45,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 36. [2021-06-05 17:06:45,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 35 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:45,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 66 transitions. [2021-06-05 17:06:45,760 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 66 transitions. Word has length 17 [2021-06-05 17:06:45,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:06:45,760 INFO L482 AbstractCegarLoop]: Abstraction has 36 states and 66 transitions. [2021-06-05 17:06:45,760 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 10 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:45,760 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 66 transitions. [2021-06-05 17:06:45,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-06-05 17:06:45,761 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:06:45,761 INFO L521 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:06:45,961 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:06:45,962 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:06:45,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:06:45,962 INFO L82 PathProgramCache]: Analyzing trace with hash -1909198613, now seen corresponding path program 7 times [2021-06-05 17:06:45,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:06:45,962 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071254824] [2021-06-05 17:06:45,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:06:45,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:06:46,001 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:06:46,001 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:06:46,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071254824] [2021-06-05 17:06:46,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071254824] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:46,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634291455] [2021-06-05 17:06:46,001 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY 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 17:06:46,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:06:46,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 17:06:46,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:06:46,101 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:06:46,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634291455] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:46,101 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:06:46,101 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-06-05 17:06:46,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49325886] [2021-06-05 17:06:46,102 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 17:06:46,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:06:46,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 17:06:46,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-06-05 17:06:46,102 INFO L87 Difference]: Start difference. First operand 36 states and 66 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:46,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:06:46,117 INFO L93 Difference]: Finished difference Result 128 states and 229 transitions. [2021-06-05 17:06:46,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 17:06:46,117 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-06-05 17:06:46,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:06:46,118 INFO L225 Difference]: With dead ends: 128 [2021-06-05 17:06:46,118 INFO L226 Difference]: Without dead ends: 117 [2021-06-05 17:06:46,118 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.7ms TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-06-05 17:06:46,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-06-05 17:06:46,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 87. [2021-06-05 17:06:46,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 2.0813953488372094) internal successors, (179), 86 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:46,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 179 transitions. [2021-06-05 17:06:46,122 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 179 transitions. Word has length 18 [2021-06-05 17:06:46,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:06:46,122 INFO L482 AbstractCegarLoop]: Abstraction has 87 states and 179 transitions. [2021-06-05 17:06:46,122 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:46,122 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 179 transitions. [2021-06-05 17:06:46,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 17:06:46,123 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:06:46,123 INFO L521 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:06:46,340 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:06:46,341 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:06:46,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:06:46,341 INFO L82 PathProgramCache]: Analyzing trace with hash 119613718, now seen corresponding path program 8 times [2021-06-05 17:06:46,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:06:46,341 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117960012] [2021-06-05 17:06:46,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:06:46,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:06:46,472 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:06:46,473 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:06:46,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117960012] [2021-06-05 17:06:46,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117960012] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:46,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716176837] [2021-06-05 17:06:46,473 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 17:06:46,514 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:06:46,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:06:46,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 17:06:46,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:06:46,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 17:06:46,588 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:06:46,589 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:06:46,590 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:06:46,590 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-05 17:06:46,597 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:06:46,597 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [716176837] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:46,597 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:06:46,597 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-06-05 17:06:46,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785547991] [2021-06-05 17:06:46,598 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 17:06:46,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:06:46,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 17:06:46,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2021-06-05 17:06:46,599 INFO L87 Difference]: Start difference. First operand 87 states and 179 transitions. Second operand has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:46,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:06:46,778 INFO L93 Difference]: Finished difference Result 179 states and 337 transitions. [2021-06-05 17:06:46,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 17:06:46,778 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 17:06:46,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:06:46,779 INFO L225 Difference]: With dead ends: 179 [2021-06-05 17:06:46,779 INFO L226 Difference]: Without dead ends: 105 [2021-06-05 17:06:46,779 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 219.8ms TimeCoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2021-06-05 17:06:46,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-06-05 17:06:46,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 41. [2021-06-05 17:06:46,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.9) internal successors, (76), 40 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:46,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 76 transitions. [2021-06-05 17:06:46,781 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 76 transitions. Word has length 19 [2021-06-05 17:06:46,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:06:46,781 INFO L482 AbstractCegarLoop]: Abstraction has 41 states and 76 transitions. [2021-06-05 17:06:46,781 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 12 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:46,781 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 76 transitions. [2021-06-05 17:06:46,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-06-05 17:06:46,782 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:06:46,782 INFO L521 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:06:46,988 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-06-05 17:06:46,989 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:06:46,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:06:46,989 INFO L82 PathProgramCache]: Analyzing trace with hash -586216115, now seen corresponding path program 9 times [2021-06-05 17:06:46,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:06:46,989 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610433814] [2021-06-05 17:06:46,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:06:46,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:06:47,038 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:06:47,039 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:06:47,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610433814] [2021-06-05 17:06:47,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610433814] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:47,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985624247] [2021-06-05 17:06:47,039 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 17:06:47,064 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 17:06:47,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:06:47,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 17:06:47,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:06:47,105 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:06:47,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1985624247] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:47,106 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:06:47,106 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-06-05 17:06:47,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852814529] [2021-06-05 17:06:47,106 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 17:06:47,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:06:47,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 17:06:47,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-06-05 17:06:47,107 INFO L87 Difference]: Start difference. First operand 41 states and 76 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:47,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:06:47,125 INFO L93 Difference]: Finished difference Result 160 states and 290 transitions. [2021-06-05 17:06:47,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 17:06:47,127 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-06-05 17:06:47,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:06:47,129 INFO L225 Difference]: With dead ends: 160 [2021-06-05 17:06:47,129 INFO L226 Difference]: Without dead ends: 147 [2021-06-05 17:06:47,129 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.9ms TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-06-05 17:06:47,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2021-06-05 17:06:47,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 111. [2021-06-05 17:06:47,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.090909090909091) internal successors, (230), 110 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:47,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 230 transitions. [2021-06-05 17:06:47,141 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 230 transitions. Word has length 20 [2021-06-05 17:06:47,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:06:47,141 INFO L482 AbstractCegarLoop]: Abstraction has 111 states and 230 transitions. [2021-06-05 17:06:47,141 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 7 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:47,142 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 230 transitions. [2021-06-05 17:06:47,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 17:06:47,144 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:06:47,144 INFO L521 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:06:47,363 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:06:47,364 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:06:47,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:06:47,364 INFO L82 PathProgramCache]: Analyzing trace with hash -812718408, now seen corresponding path program 10 times [2021-06-05 17:06:47,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:06:47,364 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470073683] [2021-06-05 17:06:47,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:06:47,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:06:47,500 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:06:47,501 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:06:47,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470073683] [2021-06-05 17:06:47,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470073683] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:47,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891202166] [2021-06-05 17:06:47,501 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST 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 17:06:47,525 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:06:47,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:06:47,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 27 conjunts are in the unsatisfiable core [2021-06-05 17:06:47,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:06:47,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 17:06:47,580 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:06:47,582 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:06:47,582 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:06:47,582 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-05 17:06:47,586 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:06:47,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1891202166] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:47,586 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:06:47,586 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-06-05 17:06:47,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803650604] [2021-06-05 17:06:47,587 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 17:06:47,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:06:47,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 17:06:47,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2021-06-05 17:06:47,587 INFO L87 Difference]: Start difference. First operand 111 states and 230 transitions. Second operand has 15 states, 15 states have (on average 1.4) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:47,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:06:47,893 INFO L93 Difference]: Finished difference Result 229 states and 435 transitions. [2021-06-05 17:06:47,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 17:06:47,893 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.4) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 17:06:47,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:06:47,894 INFO L225 Difference]: With dead ends: 229 [2021-06-05 17:06:47,894 INFO L226 Difference]: Without dead ends: 135 [2021-06-05 17:06:47,894 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 326.0ms TimeCoverageRelationStatistics Valid=135, Invalid=567, Unknown=0, NotChecked=0, Total=702 [2021-06-05 17:06:47,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2021-06-05 17:06:47,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 46. [2021-06-05 17:06:47,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.9111111111111112) internal successors, (86), 45 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:47,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 86 transitions. [2021-06-05 17:06:47,896 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 86 transitions. Word has length 21 [2021-06-05 17:06:47,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:06:47,896 INFO L482 AbstractCegarLoop]: Abstraction has 46 states and 86 transitions. [2021-06-05 17:06:47,896 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.4) internal successors, (21), 14 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:47,896 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 86 transitions. [2021-06-05 17:06:47,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-06-05 17:06:47,897 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:06:47,897 INFO L521 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:06:48,113 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:06:48,113 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:06:48,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:06:48,113 INFO L82 PathProgramCache]: Analyzing trace with hash 576259051, now seen corresponding path program 11 times [2021-06-05 17:06:48,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:06:48,113 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89442163] [2021-06-05 17:06:48,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:06:48,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:06:48,175 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:06:48,176 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:06:48,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89442163] [2021-06-05 17:06:48,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89442163] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:48,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750860905] [2021-06-05 17:06:48,176 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 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 17:06:48,204 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 17:06:48,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:06:48,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 17:06:48,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:06:48,265 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:06:48,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1750860905] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:48,265 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:06:48,265 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-06-05 17:06:48,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432713855] [2021-06-05 17:06:48,266 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 17:06:48,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:06:48,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 17:06:48,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-06-05 17:06:48,266 INFO L87 Difference]: Start difference. First operand 46 states and 86 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:48,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:06:48,281 INFO L93 Difference]: Finished difference Result 195 states and 357 transitions. [2021-06-05 17:06:48,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 17:06:48,282 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-06-05 17:06:48,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:06:48,283 INFO L225 Difference]: With dead ends: 195 [2021-06-05 17:06:48,283 INFO L226 Difference]: Without dead ends: 180 [2021-06-05 17:06:48,284 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.7ms TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-06-05 17:06:48,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-06-05 17:06:48,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 138. [2021-06-05 17:06:48,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 2.0948905109489053) internal successors, (287), 137 states have internal predecessors, (287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:48,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 287 transitions. [2021-06-05 17:06:48,292 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 287 transitions. Word has length 22 [2021-06-05 17:06:48,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:06:48,292 INFO L482 AbstractCegarLoop]: Abstraction has 138 states and 287 transitions. [2021-06-05 17:06:48,292 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:48,293 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 287 transitions. [2021-06-05 17:06:48,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 17:06:48,293 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:06:48,293 INFO L521 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:06:48,499 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-06-05 17:06:48,500 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:06:48,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:06:48,500 INFO L82 PathProgramCache]: Analyzing trace with hash 1950887574, now seen corresponding path program 12 times [2021-06-05 17:06:48,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:06:48,500 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776112898] [2021-06-05 17:06:48,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:06:48,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:06:48,643 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:06:48,643 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:06:48,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776112898] [2021-06-05 17:06:48,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776112898] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:48,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456675567] [2021-06-05 17:06:48,643 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 17:06:48,670 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 17:06:48,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:06:48,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 17:06:48,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:06:48,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 17:06:48,720 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:06:48,721 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:06:48,721 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:06:48,721 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-05 17:06:48,725 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:06:48,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1456675567] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:48,725 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:06:48,725 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2021-06-05 17:06:48,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796768529] [2021-06-05 17:06:48,725 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 17:06:48,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:06:48,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 17:06:48,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2021-06-05 17:06:48,726 INFO L87 Difference]: Start difference. First operand 138 states and 287 transitions. Second operand has 17 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:49,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:06:49,043 INFO L93 Difference]: Finished difference Result 285 states and 545 transitions. [2021-06-05 17:06:49,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 17:06:49,043 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 17:06:49,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:06:49,044 INFO L225 Difference]: With dead ends: 285 [2021-06-05 17:06:49,044 INFO L226 Difference]: Without dead ends: 169 [2021-06-05 17:06:49,044 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 328.5ms TimeCoverageRelationStatistics Valid=171, Invalid=759, Unknown=0, NotChecked=0, Total=930 [2021-06-05 17:06:49,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-06-05 17:06:49,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 51. [2021-06-05 17:06:49,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.92) internal successors, (96), 50 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:49,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 96 transitions. [2021-06-05 17:06:49,046 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 96 transitions. Word has length 23 [2021-06-05 17:06:49,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:06:49,046 INFO L482 AbstractCegarLoop]: Abstraction has 51 states and 96 transitions. [2021-06-05 17:06:49,046 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 16 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:49,046 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 96 transitions. [2021-06-05 17:06:49,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-06-05 17:06:49,047 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:06:49,047 INFO L521 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:06:49,263 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-06-05 17:06:49,263 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:06:49,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:06:49,263 INFO L82 PathProgramCache]: Analyzing trace with hash 348698573, now seen corresponding path program 13 times [2021-06-05 17:06:49,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:06:49,263 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230142800] [2021-06-05 17:06:49,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:06:49,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:06:49,328 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:06:49,328 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:06:49,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230142800] [2021-06-05 17:06:49,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230142800] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:49,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765544521] [2021-06-05 17:06:49,329 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 17:06:49,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:06:49,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 17:06:49,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:06:49,440 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:06:49,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765544521] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:49,441 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:06:49,441 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-06-05 17:06:49,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504025307] [2021-06-05 17:06:49,441 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 17:06:49,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:06:49,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 17:06:49,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-06-05 17:06:49,443 INFO L87 Difference]: Start difference. First operand 51 states and 96 transitions. Second operand has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:49,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:06:49,474 INFO L93 Difference]: Finished difference Result 233 states and 430 transitions. [2021-06-05 17:06:49,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 17:06:49,474 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-06-05 17:06:49,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:06:49,475 INFO L225 Difference]: With dead ends: 233 [2021-06-05 17:06:49,475 INFO L226 Difference]: Without dead ends: 216 [2021-06-05 17:06:49,476 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 29.7ms TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-06-05 17:06:49,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-06-05 17:06:49,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 168. [2021-06-05 17:06:49,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 2.095808383233533) internal successors, (350), 167 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:49,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 350 transitions. [2021-06-05 17:06:49,480 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 350 transitions. Word has length 24 [2021-06-05 17:06:49,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:06:49,480 INFO L482 AbstractCegarLoop]: Abstraction has 168 states and 350 transitions. [2021-06-05 17:06:49,480 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:49,480 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 350 transitions. [2021-06-05 17:06:49,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 17:06:49,481 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:06:49,481 INFO L521 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:06:49,692 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-06-05 17:06:49,692 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:06:49,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:06:49,693 INFO L82 PathProgramCache]: Analyzing trace with hash -1483217992, now seen corresponding path program 14 times [2021-06-05 17:06:49,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:06:49,693 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991993000] [2021-06-05 17:06:49,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:06:49,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:06:49,872 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:06:49,872 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:06:49,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991993000] [2021-06-05 17:06:49,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991993000] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:49,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404994127] [2021-06-05 17:06:49,873 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 17:06:49,899 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 17:06:49,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:06:49,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 17:06:49,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:06:49,946 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 17:06:49,947 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:06:49,948 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:06:49,949 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:06:49,949 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-05 17:06:49,953 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:06:49,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1404994127] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:49,953 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:06:49,953 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2021-06-05 17:06:49,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097965851] [2021-06-05 17:06:49,953 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 17:06:49,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:06:49,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 17:06:49,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2021-06-05 17:06:49,954 INFO L87 Difference]: Start difference. First operand 168 states and 350 transitions. Second operand has 19 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:50,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:06:50,347 INFO L93 Difference]: Finished difference Result 347 states and 667 transitions. [2021-06-05 17:06:50,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 17:06:50,347 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 17:06:50,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:06:50,348 INFO L225 Difference]: With dead ends: 347 [2021-06-05 17:06:50,348 INFO L226 Difference]: Without dead ends: 207 [2021-06-05 17:06:50,349 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 413.9ms TimeCoverageRelationStatistics Valid=211, Invalid=979, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 17:06:50,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-06-05 17:06:50,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 56. [2021-06-05 17:06:50,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.9272727272727272) internal successors, (106), 55 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:50,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 106 transitions. [2021-06-05 17:06:50,352 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 106 transitions. Word has length 25 [2021-06-05 17:06:50,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:06:50,352 INFO L482 AbstractCegarLoop]: Abstraction has 56 states and 106 transitions. [2021-06-05 17:06:50,352 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 18 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:50,352 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 106 transitions. [2021-06-05 17:06:50,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-06-05 17:06:50,352 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:06:50,352 INFO L521 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:06:50,568 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:06:50,568 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:06:50,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:06:50,568 INFO L82 PathProgramCache]: Analyzing trace with hash 1265608427, now seen corresponding path program 15 times [2021-06-05 17:06:50,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:06:50,568 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097338733] [2021-06-05 17:06:50,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:06:50,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:06:50,625 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:06:50,625 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:06:50,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097338733] [2021-06-05 17:06:50,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097338733] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:50,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549114546] [2021-06-05 17:06:50,626 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 17:06:50,670 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-06-05 17:06:50,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:06:50,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 17:06:50,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:06:50,729 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:06:50,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [549114546] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:50,729 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:06:50,729 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-06-05 17:06:50,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835531825] [2021-06-05 17:06:50,730 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 17:06:50,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:06:50,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 17:06:50,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-06-05 17:06:50,730 INFO L87 Difference]: Start difference. First operand 56 states and 106 transitions. Second operand has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 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 17:06:50,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:06:50,750 INFO L93 Difference]: Finished difference Result 274 states and 509 transitions. [2021-06-05 17:06:50,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 17:06:50,751 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 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 17:06:50,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:06:50,752 INFO L225 Difference]: With dead ends: 274 [2021-06-05 17:06:50,752 INFO L226 Difference]: Without dead ends: 255 [2021-06-05 17:06:50,752 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 34.8ms TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-06-05 17:06:50,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2021-06-05 17:06:50,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 201. [2021-06-05 17:06:50,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 2.095) internal successors, (419), 200 states have internal predecessors, (419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:50,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 419 transitions. [2021-06-05 17:06:50,756 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 419 transitions. Word has length 26 [2021-06-05 17:06:50,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:06:50,756 INFO L482 AbstractCegarLoop]: Abstraction has 201 states and 419 transitions. [2021-06-05 17:06:50,756 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 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 17:06:50,756 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 419 transitions. [2021-06-05 17:06:50,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 17:06:50,756 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:06:50,756 INFO L521 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:06:50,974 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-06-05 17:06:50,974 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:06:50,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:06:50,975 INFO L82 PathProgramCache]: Analyzing trace with hash 1730380822, now seen corresponding path program 16 times [2021-06-05 17:06:50,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:06:50,975 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292845717] [2021-06-05 17:06:50,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:06:50,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:06:51,214 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:06:51,214 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:06:51,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292845717] [2021-06-05 17:06:51,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292845717] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:51,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452759442] [2021-06-05 17:06:51,214 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 17:06:51,242 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 17:06:51,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:06:51,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 39 conjunts are in the unsatisfiable core [2021-06-05 17:06:51,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:06:51,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 17:06:51,307 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:06:51,308 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:06:51,308 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:06:51,308 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-05 17:06:51,312 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:06:51,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1452759442] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:51,312 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:06:51,312 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2021-06-05 17:06:51,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358510779] [2021-06-05 17:06:51,312 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 17:06:51,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:06:51,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 17:06:51,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2021-06-05 17:06:51,313 INFO L87 Difference]: Start difference. First operand 201 states and 419 transitions. Second operand has 21 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:51,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:06:51,793 INFO L93 Difference]: Finished difference Result 415 states and 801 transitions. [2021-06-05 17:06:51,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 17:06:51,794 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 17:06:51,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:06:51,794 INFO L225 Difference]: With dead ends: 415 [2021-06-05 17:06:51,794 INFO L226 Difference]: Without dead ends: 249 [2021-06-05 17:06:51,795 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 525.4ms TimeCoverageRelationStatistics Valid=255, Invalid=1227, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 17:06:51,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-06-05 17:06:51,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 61. [2021-06-05 17:06:51,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.9333333333333333) internal successors, (116), 60 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:51,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 116 transitions. [2021-06-05 17:06:51,797 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 116 transitions. Word has length 27 [2021-06-05 17:06:51,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:06:51,797 INFO L482 AbstractCegarLoop]: Abstraction has 61 states and 116 transitions. [2021-06-05 17:06:51,797 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 20 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:51,797 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 116 transitions. [2021-06-05 17:06:51,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-06-05 17:06:51,797 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:06:51,797 INFO L521 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:06:52,008 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-06-05 17:06:52,009 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:06:52,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:06:52,009 INFO L82 PathProgramCache]: Analyzing trace with hash 2102923853, now seen corresponding path program 17 times [2021-06-05 17:06:52,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:06:52,009 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053785756] [2021-06-05 17:06:52,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:06:52,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:06:52,077 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 55 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:06:52,077 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:06:52,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053785756] [2021-06-05 17:06:52,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053785756] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:52,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140798117] [2021-06-05 17:06:52,078 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 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 17:06:52,122 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-06-05 17:06:52,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:06:52,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 17:06:52,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:06:52,216 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 55 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:06:52,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [140798117] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:52,216 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:06:52,216 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-06-05 17:06:52,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874834592] [2021-06-05 17:06:52,217 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 17:06:52,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:06:52,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 17:06:52,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-06-05 17:06:52,217 INFO L87 Difference]: Start difference. First operand 61 states and 116 transitions. Second operand has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 11 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 17:06:52,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 17:06:52,240 INFO L93 Difference]: Finished difference Result 318 states and 594 transitions. [2021-06-05 17:06:52,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 17:06:52,240 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 11 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 17:06:52,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 17:06:52,241 INFO L225 Difference]: With dead ends: 318 [2021-06-05 17:06:52,241 INFO L226 Difference]: Without dead ends: 297 [2021-06-05 17:06:52,241 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 44.2ms TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-06-05 17:06:52,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2021-06-05 17:06:52,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 237. [2021-06-05 17:06:52,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 236 states have (on average 2.093220338983051) internal successors, (494), 236 states have internal predecessors, (494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 17:06:52,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 494 transitions. [2021-06-05 17:06:52,246 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 494 transitions. Word has length 28 [2021-06-05 17:06:52,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 17:06:52,246 INFO L482 AbstractCegarLoop]: Abstraction has 237 states and 494 transitions. [2021-06-05 17:06:52,246 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.3333333333333335) internal successors, (28), 11 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 17:06:52,246 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 494 transitions. [2021-06-05 17:06:52,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 17:06:52,247 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 17:06:52,247 INFO L521 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 17:06:52,460 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:06:52,461 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 17:06:52,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 17:06:52,461 INFO L82 PathProgramCache]: Analyzing trace with hash 2072596664, now seen corresponding path program 18 times [2021-06-05 17:06:52,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 17:06:52,461 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559496104] [2021-06-05 17:06:52,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 17:06:52,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 17:06:52,731 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:06:52,732 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 17:06:52,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559496104] [2021-06-05 17:06:52,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559496104] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:06:52,732 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999940344] [2021-06-05 17:06:52,732 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE 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 17:06:52,760 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-06-05 17:06:52,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 17:06:52,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 44 conjunts are in the unsatisfiable core [2021-06-05 17:06:52,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 17:07:23,483 INFO L354 Elim1Store]: treesize reduction 8, result has 27.3 percent of original size [2021-06-05 17:07:23,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 10 [2021-06-05 17:07:23,484 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 17:07:23,487 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 17:07:23,489 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 17:07:23,489 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:20, output treesize:3 [2021-06-05 17:07:23,493 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 9 proven. 65 refuted. 36 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 17:07:23,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999940344] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 17:07:23,493 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 17:07:23,493 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-06-05 17:07:23,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685898339] [2021-06-05 17:07:23,493 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-06-05 17:07:23,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 17:07:23,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-06-05 17:07:23,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=1532, Unknown=37, NotChecked=0, Total=1806 [2021-06-05 17:07:23,494 INFO L87 Difference]: Start difference. First operand 237 states and 494 transitions. Second operand has 43 states, 43 states have (on average 1.255813953488372) internal successors, (54), 42 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 17:07:26,920 WARN L205 SmtUtils]: Spent 3.17 s on a formula simplification. DAG size of input: 66 DAG size of output: 48 [2021-06-05 17:07:28,275 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 39 [2021-06-05 17:07:34,136 WARN L205 SmtUtils]: Spent 1.02 s on a formula simplification. DAG size of input: 71 DAG size of output: 40 [2021-06-05 17:07:36,610 WARN L205 SmtUtils]: Spent 332.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-06-05 17:07:40,069 WARN L205 SmtUtils]: Spent 1.33 s on a formula simplification. DAG size of input: 58 DAG size of output: 51 [2021-06-05 17:07:41,181 WARN L205 SmtUtils]: Spent 1.05 s on a formula simplification. DAG size of input: 63 DAG size of output: 41 [2021-06-05 17:07:43,025 WARN L205 SmtUtils]: Spent 1.79 s on a formula simplification. DAG size of input: 63 DAG size of output: 46 [2021-06-05 17:07:44,998 WARN L205 SmtUtils]: Spent 677.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 43 [2021-06-05 17:07:46,666 WARN L205 SmtUtils]: Spent 1.45 s on a formula simplification. DAG size of input: 62 DAG size of output: 47 [2021-06-05 17:07:51,157 WARN L205 SmtUtils]: Spent 437.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 28 [2021-06-05 17:07:52,936 WARN L205 SmtUtils]: Spent 1.74 s on a formula simplification. DAG size of input: 68 DAG size of output: 34 [2021-06-05 17:07:58,996 WARN L205 SmtUtils]: Spent 336.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-06-05 17:08:04,809 WARN L205 SmtUtils]: Spent 3.67 s on a formula simplification. DAG size of input: 54 DAG size of output: 47 [2021-06-05 17:08:07,929 WARN L205 SmtUtils]: Spent 1.03 s on a formula simplification. DAG size of input: 60 DAG size of output: 37 [2021-06-05 17:08:11,959 WARN L205 SmtUtils]: Spent 3.52 s on a formula simplification. DAG size of input: 59 DAG size of output: 42 [2021-06-05 17:08:21,594 WARN L205 SmtUtils]: Spent 9.59 s on a formula simplification. DAG size of input: 65 DAG size of output: 38 [2021-06-05 17:09:01,063 WARN L205 SmtUtils]: Spent 7.78 s on a formula simplification. DAG size of input: 59 DAG size of output: 52 [2021-06-05 17:09:09,630 WARN L205 SmtUtils]: Spent 2.43 s on a formula simplification. DAG size of input: 64 DAG size of output: 49 [2021-06-05 17:09:18,108 WARN L205 SmtUtils]: Spent 4.51 s on a formula simplification. DAG size of input: 65 DAG size of output: 38 [2021-06-05 17:09:31,209 WARN L205 SmtUtils]: Spent 376.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2021-06-05 17:09:40,432 WARN L205 SmtUtils]: Spent 383.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-06-05 17:09:49,128 WARN L205 SmtUtils]: Spent 645.00 ms on a formula simplification that was a NOOP. DAG size: 43 [2021-06-05 17:09:54,515 WARN L205 SmtUtils]: Spent 513.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-06-05 17:10:06,795 WARN L205 SmtUtils]: Spent 2.32 s on a formula simplification that was a NOOP. DAG size: 50 [2021-06-05 17:10:12,971 WARN L205 SmtUtils]: Spent 3.80 s on a formula simplification that was a NOOP. DAG size: 56 [2021-06-05 17:10:24,551 WARN L205 SmtUtils]: Spent 6.55 s on a formula simplification. DAG size of input: 56 DAG size of output: 38 [2021-06-05 17:10:33,319 WARN L205 SmtUtils]: Spent 8.68 s on a formula simplification that was a NOOP. DAG size: 63 [2021-06-05 17:11:05,197 WARN L205 SmtUtils]: Spent 3.35 s on a formula simplification that was a NOOP. DAG size: 49 [2021-06-05 17:11:31,165 WARN L205 SmtUtils]: Spent 3.36 s on a formula simplification that was a NOOP. DAG size: 56 [2021-06-05 17:11:40,424 WARN L205 SmtUtils]: Spent 2.19 s on a formula simplification. DAG size of input: 61 DAG size of output: 45 [2021-06-05 17:11:54,532 WARN L205 SmtUtils]: Spent 9.26 s on a formula simplification that was a NOOP. DAG size: 63 [2021-06-05 17:12:16,676 WARN L205 SmtUtils]: Spent 570.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-06-05 17:12:36,296 WARN L205 SmtUtils]: Spent 750.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-06-05 17:12:55,269 WARN L205 SmtUtils]: Spent 3.17 s on a formula simplification that was a NOOP. DAG size: 47 [2021-06-05 17:13:06,727 WARN L205 SmtUtils]: Spent 1.17 s on a formula simplification that was a NOOP. DAG size: 46 [2021-06-05 17:13:23,891 WARN L205 SmtUtils]: Spent 6.69 s on a formula simplification. DAG size of input: 53 DAG size of output: 46 [2021-06-05 17:13:33,138 WARN L205 SmtUtils]: Spent 5.00 s on a formula simplification. DAG size of input: 54 DAG size of output: 36 [2021-06-05 17:13:47,711 WARN L205 SmtUtils]: Spent 12.01 s on a formula simplification. DAG size of input: 61 DAG size of output: 26 [2021-06-05 17:14:49,636 WARN L205 SmtUtils]: Spent 653.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 30 [2021-06-05 17:15:08,378 WARN L205 SmtUtils]: Spent 1.25 s on a formula simplification that was a NOOP. DAG size: 46 [2021-06-05 17:15:32,709 WARN L205 SmtUtils]: Spent 4.23 s on a formula simplification that was a NOOP. DAG size: 53 [2021-06-05 17:15:52,334 WARN L205 SmtUtils]: Spent 5.39 s on a formula simplification. DAG size of input: 52 DAG size of output: 27 [2021-06-05 17:16:16,439 WARN L205 SmtUtils]: Spent 8.65 s on a formula simplification that was a NOOP. DAG size: 59 [2021-06-05 17:16:41,944 WARN L205 SmtUtils]: Spent 14.89 s on a formula simplification. DAG size of input: 61 DAG size of output: 43 [2021-06-05 17:17:14,273 WARN L205 SmtUtils]: Spent 660.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2021-06-05 17:17:41,723 WARN L205 SmtUtils]: Spent 888.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-06-05 17:17:59,375 WARN L205 SmtUtils]: Spent 1.33 s on a formula simplification that was a NOOP. DAG size: 44 [2021-06-05 17:18:26,756 WARN L205 SmtUtils]: Spent 1.58 s on a formula simplification. DAG size of input: 35 DAG size of output: 28 [2021-06-05 17:18:48,332 WARN L205 SmtUtils]: Spent 4.99 s on a formula simplification that was a NOOP. DAG size: 51 [2021-06-05 17:19:12,267 WARN L205 SmtUtils]: Spent 3.96 s on a formula simplification that was a NOOP. DAG size: 43 [2021-06-05 17:19:36,676 WARN L205 SmtUtils]: Spent 3.96 s on a formula simplification. DAG size of input: 52 DAG size of output: 35 [2021-06-05 17:19:48,905 WARN L205 SmtUtils]: Spent 742.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2021-06-05 17:21:01,406 WARN L205 SmtUtils]: Spent 726.00 ms on a formula simplification that was a NOOP. DAG size: 37 Received shutdown request... [2021-06-05 17:21:09,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2021-06-05 17:21:10,181 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 17:21:10,181 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-05 17:21:10,183 INFO L246 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 17:21:10,184 WARN L196 ceAbstractionStarter]: Timeout [2021-06-05 17:21:10,184 INFO L202 PluginConnector]: Adding new model context1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 05:21:10 BasicIcfg [2021-06-05 17:21:10,184 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 17:21:10,185 INFO L168 Benchmark]: Toolchain (without parser) took 891971.45 ms. Allocated memory was 348.1 MB in the beginning and 434.1 MB in the end (delta: 86.0 MB). Free memory was 327.5 MB in the beginning and 258.5 MB in the end (delta: 69.0 MB). Peak memory consumption was 158.4 MB. Max. memory is 16.0 GB. [2021-06-05 17:21:10,185 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.10 ms. Allocated memory is still 348.1 MB. Free memory is still 328.7 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 17:21:10,185 INFO L168 Benchmark]: Boogie Procedure Inliner took 18.95 ms. Allocated memory is still 348.1 MB. Free memory was 327.5 MB in the beginning and 326.0 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 17:21:10,185 INFO L168 Benchmark]: Boogie Preprocessor took 10.84 ms. Allocated memory is still 348.1 MB. Free memory was 326.0 MB in the beginning and 325.1 MB in the end (delta: 922.5 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 17:21:10,185 INFO L168 Benchmark]: RCFGBuilder took 210.08 ms. Allocated memory is still 348.1 MB. Free memory was 325.0 MB in the beginning and 313.6 MB in the end (delta: 11.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.0 GB. [2021-06-05 17:21:10,185 INFO L168 Benchmark]: TraceAbstraction took 891721.57 ms. Allocated memory was 348.1 MB in the beginning and 434.1 MB in the end (delta: 86.0 MB). Free memory was 313.2 MB in the beginning and 258.5 MB in the end (delta: 54.6 MB). Peak memory consumption was 143.7 MB. Max. memory is 16.0 GB. [2021-06-05 17:21:10,185 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.10 ms. Allocated memory is still 348.1 MB. Free memory is still 328.7 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 18.95 ms. Allocated memory is still 348.1 MB. Free memory was 327.5 MB in the beginning and 326.0 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 10.84 ms. Allocated memory is still 348.1 MB. Free memory was 326.0 MB in the beginning and 325.1 MB in the end (delta: 922.5 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 210.08 ms. Allocated memory is still 348.1 MB. Free memory was 325.0 MB in the beginning and 313.6 MB in the end (delta: 11.4 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.0 GB. * TraceAbstraction took 891721.57 ms. Allocated memory was 348.1 MB in the beginning and 434.1 MB in the end (delta: 86.0 MB). Free memory was 313.2 MB in the beginning and 258.5 MB in the end (delta: 54.6 MB). Peak memory consumption was 143.7 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 42]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (237states) and FLOYD_HOARE automaton (currently 104 states, 43 states before enhancement),while PredicateComparison was comparing new predicate (quantified with 0quantifier alternations) to 144 known predicates. - TimeoutResultAtElement [Line: 42]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (237states) and FLOYD_HOARE automaton (currently 104 states, 43 states before enhancement),while PredicateComparison was comparing new predicate (quantified with 0quantifier alternations) to 144 known predicates. - TimeoutResultAtElement [Line: 47]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (237states) and FLOYD_HOARE automaton (currently 104 states, 43 states before enhancement),while PredicateComparison was comparing new predicate (quantified with 0quantifier alternations) to 144 known predicates. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 20 locations, 3 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 891605.6ms, OverallIterations: 20, TraceHistogramMax: 10, EmptinessCheckTime: 25.0ms, AutomataDifference: 849123.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 12.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 657 SDtfs, 2772 SDslu, 5553 SDs, 0 SdLazy, 1670 SolverSat, 819 SolverUnsat, 50 SolverUnknown, 0 SolverNotchecked, 27062.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 792 GetRequests, 368 SyntacticMatches, 22 SemanticMatches, 401 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7388 ImplicationChecksByTransitivity, 849491.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=237occurred in iteration=19, InterpolantAutomatonStates: 202, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 88.9ms AutomataMinimizationTime, 19 MinimizatonAttempts, 1024 StatesRemovedByMinimization, 16 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 68.7ms SsaConstructionTime, 304.6ms SatisfiabilityAnalysisTime, 37674.1ms InterpolantComputationTime, 747 NumberOfCodeBlocks, 747 NumberOfCodeBlocksAsserted, 72 NumberOfCheckSat, 709 ConstructedInterpolants, 19 QuantifiedInterpolants, 3222 SizeOfPredicates, 10 NumberOfNonLiveVariables, 1519 ConjunctsInSsa, 352 ConjunctsInUnsatCore, 38 InterpolantComputations, 2 PerfectInterpolantSequences, 429/1617 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown