/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/nla-digbench-scaling/ps5-ll_valuebound50.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 05:45:42,685 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 05:45:42,690 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 05:45:42,749 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-12-22 05:45:42,780 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 05:45:42,786 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 05:45:42,789 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 05:45:42,791 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 05:45:42,792 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 05:45:42,796 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 05:45:42,803 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 05:45:42,812 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 05:45:42,814 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 05:45:42,817 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 05:45:42,818 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 05:45:42,821 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 05:45:42,837 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 05:45:42,848 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 05:45:42,849 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 05:45:42,850 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 05:45:42,851 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 05:45:42,878 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 05:45:42,879 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 05:45:42,880 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 05:45:42,881 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 05:45:42,881 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 05:45:42,881 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 05:45:42,881 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 05:45:42,882 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 05:45:42,882 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 05:45:42,882 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 05:45:42,882 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 05:45:42,883 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 05:45:42,883 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 05:45:42,883 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 05:45:42,883 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 05:45:42,883 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 05:45:42,884 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 05:45:42,884 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 05:45:42,884 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 05:45:42,884 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 05:45:42,885 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 05:45:42,885 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 05:45:42,885 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 05:45:42,885 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 05:45:42,886 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 05:45:42,886 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 05:45:43,338 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 05:45:43,369 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 05:45:43,372 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 05:45:43,374 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 05:45:43,375 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 05:45:43,376 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/ps5-ll_valuebound50.c [2020-12-22 05:45:43,470 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/197258afa/8aa39df3fb4b4a7097875e32c3beef1f/FLAG101a85a1f [2020-12-22 05:45:44,136 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 05:45:44,136 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/ps5-ll_valuebound50.c [2020-12-22 05:45:44,145 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/197258afa/8aa39df3fb4b4a7097875e32c3beef1f/FLAG101a85a1f [2020-12-22 05:45:44,496 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/197258afa/8aa39df3fb4b4a7097875e32c3beef1f [2020-12-22 05:45:44,503 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 05:45:44,506 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 05:45:44,510 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 05:45:44,510 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 05:45:44,515 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 05:45:44,516 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 05:45:44" (1/1) ... [2020-12-22 05:45:44,518 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@10bc2b49 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:45:44, skipping insertion in model container [2020-12-22 05:45:44,518 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 05:45:44" (1/1) ... [2020-12-22 05:45:44,528 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 05:45:44,549 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 05:45:44,728 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/ps5-ll_valuebound50.c[458,471] [2020-12-22 05:45:44,749 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 05:45:44,759 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 05:45:44,772 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/ps5-ll_valuebound50.c[458,471] [2020-12-22 05:45:44,781 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 05:45:44,798 INFO L208 MainTranslator]: Completed translation [2020-12-22 05:45:44,798 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:45:44 WrapperNode [2020-12-22 05:45:44,799 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 05:45:44,800 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 05:45:44,800 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 05:45:44,800 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 05:45:44,810 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:45:44" (1/1) ... [2020-12-22 05:45:44,818 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:45:44" (1/1) ... [2020-12-22 05:45:44,845 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 05:45:44,847 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 05:45:44,847 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 05:45:44,847 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 05:45:44,857 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:45:44" (1/1) ... [2020-12-22 05:45:44,857 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:45:44" (1/1) ... [2020-12-22 05:45:44,859 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:45:44" (1/1) ... [2020-12-22 05:45:44,860 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:45:44" (1/1) ... [2020-12-22 05:45:44,864 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:45:44" (1/1) ... [2020-12-22 05:45:44,869 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:45:44" (1/1) ... [2020-12-22 05:45:44,871 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:45:44" (1/1) ... [2020-12-22 05:45:44,874 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 05:45:44,875 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 05:45:44,875 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 05:45:44,875 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 05:45:44,876 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:45:44" (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 [2020-12-22 05:45:44,981 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 05:45:44,981 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 05:45:44,982 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 05:45:44,982 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 05:45:45,297 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 05:45:45,297 INFO L299 CfgBuilder]: Removed 15 assume(true) statements. [2020-12-22 05:45:45,301 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 05:45:45 BoogieIcfgContainer [2020-12-22 05:45:45,301 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 05:45:45,305 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 05:45:45,305 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 05:45:45,313 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 05:45:45,314 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 05:45:44" (1/3) ... [2020-12-22 05:45:45,315 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65e3132 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 05:45:45, skipping insertion in model container [2020-12-22 05:45:45,315 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:45:44" (2/3) ... [2020-12-22 05:45:45,319 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65e3132 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 05:45:45, skipping insertion in model container [2020-12-22 05:45:45,319 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 05:45:45" (3/3) ... [2020-12-22 05:45:45,322 INFO L111 eAbstractionObserver]: Analyzing ICFG ps5-ll_valuebound50.c [2020-12-22 05:45:45,338 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 05:45:45,349 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2020-12-22 05:45:45,378 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-12-22 05:45:45,413 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 05:45:45,414 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 05:45:45,414 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 05:45:45,414 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 05:45:45,414 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 05:45:45,414 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 05:45:45,415 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 05:45:45,415 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 05:45:45,432 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states. [2020-12-22 05:45:45,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-22 05:45:45,438 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:45:45,439 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:45:45,442 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:45:45,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:45:45,456 INFO L82 PathProgramCache]: Analyzing trace with hash -594062832, now seen corresponding path program 1 times [2020-12-22 05:45:45,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:45:45,473 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851595961] [2020-12-22 05:45:45,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:45:45,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:45:45,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:45:45,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851595961] [2020-12-22 05:45:45,657 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 05:45:45,657 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 05:45:45,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194419179] [2020-12-22 05:45:45,664 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 05:45:45,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:45:45,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 05:45:45,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 05:45:45,685 INFO L87 Difference]: Start difference. First operand 23 states. Second operand 2 states. [2020-12-22 05:45:45,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:45:45,707 INFO L93 Difference]: Finished difference Result 43 states and 56 transitions. [2020-12-22 05:45:45,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 05:45:45,709 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 9 [2020-12-22 05:45:45,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:45:45,720 INFO L225 Difference]: With dead ends: 43 [2020-12-22 05:45:45,720 INFO L226 Difference]: Without dead ends: 19 [2020-12-22 05:45:45,724 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 05:45:45,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-12-22 05:45:45,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-12-22 05:45:45,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-12-22 05:45:45,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2020-12-22 05:45:45,765 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 9 [2020-12-22 05:45:45,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:45:45,766 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2020-12-22 05:45:45,766 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 05:45:45,767 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2020-12-22 05:45:45,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-22 05:45:45,767 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:45:45,768 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:45:45,768 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 05:45:45,768 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:45:45,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:45:45,770 INFO L82 PathProgramCache]: Analyzing trace with hash 1182791572, now seen corresponding path program 1 times [2020-12-22 05:45:45,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:45:45,770 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735981907] [2020-12-22 05:45:45,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:45:45,793 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:45:45,794 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [336220760] [2020-12-22 05:45:45,794 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 [2020-12-22 05:45:45,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:45:45,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-22 05:45:45,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:45:46,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:45:46,089 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735981907] [2020-12-22 05:45:46,090 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:45:46,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336220760] [2020-12-22 05:45:46,091 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 05:45:46,091 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 05:45:46,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536827467] [2020-12-22 05:45:46,094 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 05:45:46,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:45:46,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 05:45:46,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 05:45:46,098 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 5 states. [2020-12-22 05:45:46,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:45:46,217 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2020-12-22 05:45:46,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 05:45:46,218 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2020-12-22 05:45:46,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:45:46,219 INFO L225 Difference]: With dead ends: 33 [2020-12-22 05:45:46,219 INFO L226 Difference]: Without dead ends: 23 [2020-12-22 05:45:46,220 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-22 05:45:46,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-12-22 05:45:46,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2020-12-22 05:45:46,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-12-22 05:45:46,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2020-12-22 05:45:46,227 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 9 [2020-12-22 05:45:46,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:45:46,227 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2020-12-22 05:45:46,228 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 05:45:46,228 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2020-12-22 05:45:46,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-22 05:45:46,229 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:45:46,229 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:45:46,443 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-22 05:45:46,444 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:45:46,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:45:46,445 INFO L82 PathProgramCache]: Analyzing trace with hash 636965506, now seen corresponding path program 1 times [2020-12-22 05:45:46,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:45:46,445 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224314334] [2020-12-22 05:45:46,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:45:46,475 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:45:46,476 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [528625618] [2020-12-22 05:45:46,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:45:46,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:45:46,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-22 05:45:46,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:45:46,671 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:45:46,672 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224314334] [2020-12-22 05:45:46,672 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:45:46,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528625618] [2020-12-22 05:45:46,674 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:45:46,675 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-12-22 05:45:46,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620290483] [2020-12-22 05:45:46,677 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 05:45:46,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:45:46,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 05:45:46,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-22 05:45:46,682 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 6 states. [2020-12-22 05:45:46,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:45:46,840 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2020-12-22 05:45:46,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 05:45:46,841 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 12 [2020-12-22 05:45:46,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:45:46,842 INFO L225 Difference]: With dead ends: 36 [2020-12-22 05:45:46,842 INFO L226 Difference]: Without dead ends: 32 [2020-12-22 05:45:46,843 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-12-22 05:45:46,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-12-22 05:45:46,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 27. [2020-12-22 05:45:46,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-12-22 05:45:46,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-12-22 05:45:46,852 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 12 [2020-12-22 05:45:46,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:45:46,852 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-12-22 05:45:46,852 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 05:45:46,852 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-12-22 05:45:46,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-22 05:45:46,853 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:45:46,853 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:45:47,060 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:45:47,061 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:45:47,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:45:47,062 INFO L82 PathProgramCache]: Analyzing trace with hash 678815956, now seen corresponding path program 2 times [2020-12-22 05:45:47,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:45:47,063 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625419991] [2020-12-22 05:45:47,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:45:47,080 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:45:47,080 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1734430259] [2020-12-22 05:45:47,081 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 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 [2020-12-22 05:45:47,628 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 05:45:47,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 05:45:47,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 30 conjunts are in the unsatisfiable core [2020-12-22 05:45:47,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:45:47,783 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:45:47,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625419991] [2020-12-22 05:45:47,784 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:45:47,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734430259] [2020-12-22 05:45:47,784 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:45:47,784 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-12-22 05:45:47,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470179051] [2020-12-22 05:45:47,785 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 05:45:47,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:45:47,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 05:45:47,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-12-22 05:45:47,786 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 8 states. [2020-12-22 05:45:47,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:45:47,949 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2020-12-22 05:45:47,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 05:45:47,953 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 15 [2020-12-22 05:45:47,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:45:47,956 INFO L225 Difference]: With dead ends: 45 [2020-12-22 05:45:47,956 INFO L226 Difference]: Without dead ends: 41 [2020-12-22 05:45:47,957 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-12-22 05:45:47,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-12-22 05:45:47,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 30. [2020-12-22 05:45:47,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-12-22 05:45:47,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2020-12-22 05:45:47,965 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 15 [2020-12-22 05:45:47,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:45:47,965 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2020-12-22 05:45:47,965 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 05:45:47,965 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2020-12-22 05:45:47,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-22 05:45:47,966 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:45:47,966 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:45:48,174 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:45:48,175 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:45:48,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:45:48,176 INFO L82 PathProgramCache]: Analyzing trace with hash -531865812, now seen corresponding path program 1 times [2020-12-22 05:45:48,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:45:48,177 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857954318] [2020-12-22 05:45:48,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:45:48,204 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:45:48,205 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1332508759] [2020-12-22 05:45:48,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:45:48,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:45:48,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-22 05:45:48,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:45:48,390 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 05:45:48,407 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:45:48,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857954318] [2020-12-22 05:45:48,407 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:45:48,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332508759] [2020-12-22 05:45:48,408 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:45:48,408 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-12-22 05:45:48,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299707841] [2020-12-22 05:45:48,409 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 05:45:48,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:45:48,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 05:45:48,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-12-22 05:45:48,410 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 8 states. [2020-12-22 05:45:48,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:45:48,650 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2020-12-22 05:45:48,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 05:45:48,650 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 17 [2020-12-22 05:45:48,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:45:48,651 INFO L225 Difference]: With dead ends: 36 [2020-12-22 05:45:48,652 INFO L226 Difference]: Without dead ends: 30 [2020-12-22 05:45:48,652 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-12-22 05:45:48,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-12-22 05:45:48,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-12-22 05:45:48,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-12-22 05:45:48,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2020-12-22 05:45:48,660 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 17 [2020-12-22 05:45:48,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:45:48,660 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2020-12-22 05:45:48,661 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 05:45:48,661 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2020-12-22 05:45:48,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-22 05:45:48,662 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:45:48,662 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:45:48,876 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:45:48,877 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:45:48,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:45:48,879 INFO L82 PathProgramCache]: Analyzing trace with hash 1905056066, now seen corresponding path program 3 times [2020-12-22 05:45:48,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:45:48,880 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71197691] [2020-12-22 05:45:48,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:45:48,894 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:45:48,894 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [189175989] [2020-12-22 05:45:48,894 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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