/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/array-industry-pattern/array_of_struct_ptr_mul_init.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-21 21:48:23,591 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-21 21:48:23,596 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-21 21:48:23,656 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-12-21 21:48:23,764 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-21 21:48:23,765 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-21 21:48:23,766 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-21 21:48:23,772 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-21 21:48:23,828 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-21 21:48:23,829 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-21 21:48:23,835 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-21 21:48:23,836 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-21 21:48:23,836 INFO L138 SettingsManager]: * Use SBE=true [2020-12-21 21:48:23,836 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-21 21:48:23,837 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-21 21:48:23,837 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-21 21:48:23,837 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-21 21:48:23,837 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-21 21:48:23,839 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-21 21:48:23,839 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-21 21:48:23,839 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-21 21:48:23,840 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-21 21:48:23,840 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-21 21:48:23,840 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-21 21:48:23,840 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-21 21:48:23,840 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-21 21:48:23,841 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-21 21:48:23,841 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-21 21:48:23,841 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-21 21:48:23,841 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-21 21:48:23,842 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-21 21:48:23,842 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-21 21:48:23,842 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-21 21:48:23,842 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-21 21:48:24,312 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-21 21:48:24,345 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-21 21:48:24,348 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-21 21:48:24,350 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-21 21:48:24,351 INFO L275 PluginConnector]: CDTParser initialized [2020-12-21 21:48:24,352 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/array-industry-pattern/array_of_struct_ptr_mul_init.i [2020-12-21 21:48:24,458 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/607b1c7c8/5062182cfd35463da608290c03861cb1/FLAGd58407782 [2020-12-21 21:48:25,111 INFO L306 CDTParser]: Found 1 translation units. [2020-12-21 21:48:25,112 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/array-industry-pattern/array_of_struct_ptr_mul_init.i [2020-12-21 21:48:25,122 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/607b1c7c8/5062182cfd35463da608290c03861cb1/FLAGd58407782 [2020-12-21 21:48:25,442 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/607b1c7c8/5062182cfd35463da608290c03861cb1 [2020-12-21 21:48:25,446 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-21 21:48:25,449 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-21 21:48:25,453 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-21 21:48:25,453 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-21 21:48:25,457 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-21 21:48:25,458 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 09:48:25" (1/1) ... [2020-12-21 21:48:25,460 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@560568f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:48:25, skipping insertion in model container [2020-12-21 21:48:25,461 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.12 09:48:25" (1/1) ... [2020-12-21 21:48:25,473 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-21 21:48:25,494 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-21 21:48:25,659 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/array-industry-pattern/array_of_struct_ptr_mul_init.i[821,834] [2020-12-21 21:48:25,678 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 21:48:27,712 INFO L203 MainTranslator]: Completed pre-run [2020-12-21 21:48:27,750 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/array-industry-pattern/array_of_struct_ptr_mul_init.i[821,834] [2020-12-21 21:48:27,778 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-21 21:48:27,821 INFO L208 MainTranslator]: Completed translation [2020-12-21 21:48:27,821 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:48:27 WrapperNode [2020-12-21 21:48:27,821 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-21 21:48:27,824 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-21 21:48:27,825 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-21 21:48:27,825 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-21 21:48:27,834 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:48:27" (1/1) ... [2020-12-21 21:48:27,856 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:48:27" (1/1) ... [2020-12-21 21:48:27,889 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-21 21:48:27,895 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-21 21:48:27,895 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-21 21:48:27,896 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-21 21:48:27,906 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:48:27" (1/1) ... [2020-12-21 21:48:27,906 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:48:27" (1/1) ... [2020-12-21 21:48:27,913 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:48:27" (1/1) ... [2020-12-21 21:48:27,913 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:48:27" (1/1) ... [2020-12-21 21:48:27,933 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:48:27" (1/1) ... [2020-12-21 21:48:27,939 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:48:27" (1/1) ... [2020-12-21 21:48:27,946 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:48:27" (1/1) ... [2020-12-21 21:48:27,949 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-21 21:48:27,950 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-21 21:48:27,950 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-21 21:48:27,951 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-21 21:48:27,952 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:48:27" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-21 21:48:28,135 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-21 21:48:28,135 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-21 21:48:28,135 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-21 21:48:28,136 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-21 21:48:28,136 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-21 21:48:28,136 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-21 21:48:28,501 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-21 21:48:28,501 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2020-12-21 21:48:28,506 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 09:48:28 BoogieIcfgContainer [2020-12-21 21:48:28,506 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-21 21:48:28,509 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-21 21:48:28,509 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-21 21:48:28,519 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-21 21:48:28,519 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.12 09:48:25" (1/3) ... [2020-12-21 21:48:28,520 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68bd9a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 09:48:28, skipping insertion in model container [2020-12-21 21:48:28,520 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.12 09:48:27" (2/3) ... [2020-12-21 21:48:28,521 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@68bd9a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.12 09:48:28, skipping insertion in model container [2020-12-21 21:48:28,521 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.12 09:48:28" (3/3) ... [2020-12-21 21:48:28,527 INFO L111 eAbstractionObserver]: Analyzing ICFG array_of_struct_ptr_mul_init.i [2020-12-21 21:48:28,545 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-21 21:48:28,562 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-21 21:48:28,604 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-21 21:48:28,663 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-21 21:48:28,663 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-21 21:48:28,663 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-21 21:48:28,663 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-21 21:48:28,664 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-21 21:48:28,664 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-21 21:48:28,667 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-21 21:48:28,667 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-21 21:48:28,696 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2020-12-21 21:48:28,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-21 21:48:28,708 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:48:28,712 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:48:28,713 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:48:28,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:48:28,723 INFO L82 PathProgramCache]: Analyzing trace with hash 542545282, now seen corresponding path program 1 times [2020-12-21 21:48:28,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:48:28,748 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562114909] [2020-12-21 21:48:28,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:48:28,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:48:29,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:48:29,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562114909] [2020-12-21 21:48:29,005 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 21:48:29,005 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-21 21:48:29,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786136226] [2020-12-21 21:48:29,012 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-21 21:48:29,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:48:29,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-21 21:48:29,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-21 21:48:29,036 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 2 states. [2020-12-21 21:48:29,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:48:29,067 INFO L93 Difference]: Finished difference Result 38 states and 52 transitions. [2020-12-21 21:48:29,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-21 21:48:29,069 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2020-12-21 21:48:29,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:48:29,089 INFO L225 Difference]: With dead ends: 38 [2020-12-21 21:48:29,090 INFO L226 Difference]: Without dead ends: 17 [2020-12-21 21:48:29,094 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 [2020-12-21 21:48:29,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-12-21 21:48:29,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-12-21 21:48:29,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-12-21 21:48:29,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 21 transitions. [2020-12-21 21:48:29,141 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 21 transitions. Word has length 11 [2020-12-21 21:48:29,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:48:29,142 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 21 transitions. [2020-12-21 21:48:29,142 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-21 21:48:29,142 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 21 transitions. [2020-12-21 21:48:29,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-21 21:48:29,144 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:48:29,144 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:48:29,145 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-21 21:48:29,145 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:48:29,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:48:29,150 INFO L82 PathProgramCache]: Analyzing trace with hash -630060617, now seen corresponding path program 1 times [2020-12-21 21:48:29,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:48:29,151 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045149576] [2020-12-21 21:48:29,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:48:29,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:48:29,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-21 21:48:29,279 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045149576] [2020-12-21 21:48:29,280 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-21 21:48:29,280 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-21 21:48:29,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030401025] [2020-12-21 21:48:29,282 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-21 21:48:29,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:48:29,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-21 21:48:29,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 21:48:29,284 INFO L87 Difference]: Start difference. First operand 17 states and 21 transitions. Second operand 3 states. [2020-12-21 21:48:29,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:48:29,374 INFO L93 Difference]: Finished difference Result 43 states and 54 transitions. [2020-12-21 21:48:29,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-21 21:48:29,375 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2020-12-21 21:48:29,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:48:29,376 INFO L225 Difference]: With dead ends: 43 [2020-12-21 21:48:29,377 INFO L226 Difference]: Without dead ends: 30 [2020-12-21 21:48:29,381 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-21 21:48:29,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-12-21 21:48:29,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 19. [2020-12-21 21:48:29,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-12-21 21:48:29,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 23 transitions. [2020-12-21 21:48:29,390 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 23 transitions. Word has length 11 [2020-12-21 21:48:29,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:48:29,391 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 23 transitions. [2020-12-21 21:48:29,391 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-21 21:48:29,391 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 23 transitions. [2020-12-21 21:48:29,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-21 21:48:29,393 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:48:29,393 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:48:29,393 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-21 21:48:29,394 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:48:29,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:48:29,396 INFO L82 PathProgramCache]: Analyzing trace with hash 2036151027, now seen corresponding path program 1 times [2020-12-21 21:48:29,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:48:29,397 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141954230] [2020-12-21 21:48:29,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:48:29,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:48:29,487 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-21 21:48:29,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141954230] [2020-12-21 21:48:29,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963177413] [2020-12-21 21:48:29,491 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 [2020-12-21 21:48:29,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:48:29,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-21 21:48:29,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:48:29,676 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-21 21:48:29,677 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-21 21:48:29,677 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2020-12-21 21:48:29,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251400707] [2020-12-21 21:48:29,679 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-21 21:48:29,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:48:29,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-21 21:48:29,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:48:29,686 INFO L87 Difference]: Start difference. First operand 19 states and 23 transitions. Second operand 5 states. [2020-12-21 21:48:29,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:48:29,844 INFO L93 Difference]: Finished difference Result 57 states and 70 transitions. [2020-12-21 21:48:29,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-21 21:48:29,845 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-12-21 21:48:29,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:48:29,847 INFO L225 Difference]: With dead ends: 57 [2020-12-21 21:48:29,848 INFO L226 Difference]: Without dead ends: 43 [2020-12-21 21:48:29,849 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:48:29,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-12-21 21:48:29,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 24. [2020-12-21 21:48:29,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-12-21 21:48:29,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2020-12-21 21:48:29,859 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 16 [2020-12-21 21:48:29,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:48:29,860 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2020-12-21 21:48:29,860 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-21 21:48:29,860 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2020-12-21 21:48:29,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-21 21:48:29,861 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:48:29,861 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:48:30,075 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-12-21 21:48:30,076 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:48:30,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:48:30,078 INFO L82 PathProgramCache]: Analyzing trace with hash 1468366451, now seen corresponding path program 2 times [2020-12-21 21:48:30,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:48:30,079 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304782327] [2020-12-21 21:48:30,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:48:30,098 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 21:48:30,099 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [322178440] [2020-12-21 21:48:30,099 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 [2020-12-21 21:48:30,155 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:48:30,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:48:30,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-21 21:48:30,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:48:30,239 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-21 21:48:30,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304782327] [2020-12-21 21:48:30,240 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 21:48:30,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322178440] [2020-12-21 21:48:30,240 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 21:48:30,241 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-12-21 21:48:30,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286299931] [2020-12-21 21:48:30,242 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-21 21:48:30,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:48:30,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-21 21:48:30,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:48:30,244 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand 5 states. [2020-12-21 21:48:30,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:48:30,369 INFO L93 Difference]: Finished difference Result 73 states and 89 transitions. [2020-12-21 21:48:30,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-21 21:48:30,370 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 21 [2020-12-21 21:48:30,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:48:30,371 INFO L225 Difference]: With dead ends: 73 [2020-12-21 21:48:30,371 INFO L226 Difference]: Without dead ends: 56 [2020-12-21 21:48:30,372 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-21 21:48:30,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-12-21 21:48:30,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 29. [2020-12-21 21:48:30,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-12-21 21:48:30,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2020-12-21 21:48:30,378 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 21 [2020-12-21 21:48:30,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:48:30,379 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2020-12-21 21:48:30,379 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-21 21:48:30,379 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2020-12-21 21:48:30,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-21 21:48:30,380 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:48:30,380 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:48:30,594 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:48:30,595 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:48:30,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:48:30,596 INFO L82 PathProgramCache]: Analyzing trace with hash 1638808119, now seen corresponding path program 3 times [2020-12-21 21:48:30,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:48:30,597 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766242002] [2020-12-21 21:48:30,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:48:30,621 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 21:48:30,622 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1840455519] [2020-12-21 21:48:30,622 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 [2020-12-21 21:48:30,695 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-21 21:48:30,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:48:30,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-21 21:48:30,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:48:30,753 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-12-21 21:48:30,754 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766242002] [2020-12-21 21:48:30,754 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 21:48:30,754 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840455519] [2020-12-21 21:48:30,754 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 21:48:30,754 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-12-21 21:48:30,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21949484] [2020-12-21 21:48:30,755 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-21 21:48:30,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:48:30,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-21 21:48:30,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-21 21:48:30,756 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand 6 states. [2020-12-21 21:48:30,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:48:30,866 INFO L93 Difference]: Finished difference Result 89 states and 108 transitions. [2020-12-21 21:48:30,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-21 21:48:30,866 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 26 [2020-12-21 21:48:30,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:48:30,868 INFO L225 Difference]: With dead ends: 89 [2020-12-21 21:48:30,868 INFO L226 Difference]: Without dead ends: 69 [2020-12-21 21:48:30,869 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-12-21 21:48:30,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-12-21 21:48:30,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 34. [2020-12-21 21:48:30,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-12-21 21:48:30,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2020-12-21 21:48:30,876 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 26 [2020-12-21 21:48:30,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:48:30,877 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2020-12-21 21:48:30,877 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-21 21:48:30,877 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2020-12-21 21:48:30,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-12-21 21:48:30,878 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:48:30,878 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:48:31,091 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:48:31,092 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:48:31,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:48:31,094 INFO L82 PathProgramCache]: Analyzing trace with hash -1366955217, now seen corresponding path program 4 times [2020-12-21 21:48:31,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:48:31,094 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099427113] [2020-12-21 21:48:31,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:48:31,110 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 21:48:31,111 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [653656309] [2020-12-21 21:48:31,111 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 [2020-12-21 21:48:31,172 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-21 21:48:31,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:48:31,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-21 21:48:31,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:48:31,252 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-12-21 21:48:31,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099427113] [2020-12-21 21:48:31,252 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 21:48:31,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653656309] [2020-12-21 21:48:31,253 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 21:48:31,253 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-12-21 21:48:31,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052798964] [2020-12-21 21:48:31,254 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-21 21:48:31,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:48:31,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-21 21:48:31,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-21 21:48:31,255 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand 7 states. [2020-12-21 21:48:31,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:48:31,361 INFO L93 Difference]: Finished difference Result 105 states and 127 transitions. [2020-12-21 21:48:31,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-21 21:48:31,362 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 31 [2020-12-21 21:48:31,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:48:31,363 INFO L225 Difference]: With dead ends: 105 [2020-12-21 21:48:31,363 INFO L226 Difference]: Without dead ends: 82 [2020-12-21 21:48:31,364 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-12-21 21:48:31,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-12-21 21:48:31,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 39. [2020-12-21 21:48:31,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-12-21 21:48:31,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 47 transitions. [2020-12-21 21:48:31,372 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 47 transitions. Word has length 31 [2020-12-21 21:48:31,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:48:31,372 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 47 transitions. [2020-12-21 21:48:31,373 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-21 21:48:31,373 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 47 transitions. [2020-12-21 21:48:31,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-12-21 21:48:31,374 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:48:31,374 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:48:31,588 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:48:31,589 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:48:31,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:48:31,590 INFO L82 PathProgramCache]: Analyzing trace with hash 684091771, now seen corresponding path program 5 times [2020-12-21 21:48:31,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:48:31,591 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917703660] [2020-12-21 21:48:31,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:48:31,608 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 21:48:31,609 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1549854447] [2020-12-21 21:48:31,609 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 [2020-12-21 21:48:33,383 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-12-21 21:48:33,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:48:33,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-21 21:48:33,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:48:33,469 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-12-21 21:48:33,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917703660] [2020-12-21 21:48:33,470 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 21:48:33,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549854447] [2020-12-21 21:48:33,471 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 21:48:33,471 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-12-21 21:48:33,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764096905] [2020-12-21 21:48:33,472 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-21 21:48:33,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:48:33,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-21 21:48:33,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-21 21:48:33,473 INFO L87 Difference]: Start difference. First operand 39 states and 47 transitions. Second operand 8 states. [2020-12-21 21:48:33,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:48:33,602 INFO L93 Difference]: Finished difference Result 121 states and 146 transitions. [2020-12-21 21:48:33,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-21 21:48:33,603 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 36 [2020-12-21 21:48:33,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:48:33,604 INFO L225 Difference]: With dead ends: 121 [2020-12-21 21:48:33,604 INFO L226 Difference]: Without dead ends: 95 [2020-12-21 21:48:33,605 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-12-21 21:48:33,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-12-21 21:48:33,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 44. [2020-12-21 21:48:33,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-12-21 21:48:33,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 53 transitions. [2020-12-21 21:48:33,612 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 53 transitions. Word has length 36 [2020-12-21 21:48:33,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:48:33,612 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 53 transitions. [2020-12-21 21:48:33,612 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-21 21:48:33,612 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 53 transitions. [2020-12-21 21:48:33,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-21 21:48:33,614 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:48:33,614 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:48:33,827 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-12-21 21:48:33,828 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:48:33,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:48:33,829 INFO L82 PathProgramCache]: Analyzing trace with hash -41218069, now seen corresponding path program 6 times [2020-12-21 21:48:33,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:48:33,829 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27987141] [2020-12-21 21:48:33,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:48:33,852 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 21:48:33,853 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1118389900] [2020-12-21 21:48:33,853 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) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:48:34,482 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-12-21 21:48:34,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:48:34,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-21 21:48:34,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:48:34,578 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-12-21 21:48:34,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27987141] [2020-12-21 21:48:34,579 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 21:48:34,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118389900] [2020-12-21 21:48:34,580 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 21:48:34,580 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-12-21 21:48:34,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8007221] [2020-12-21 21:48:34,581 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-21 21:48:34,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:48:34,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-21 21:48:34,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-21 21:48:34,582 INFO L87 Difference]: Start difference. First operand 44 states and 53 transitions. Second operand 9 states. [2020-12-21 21:48:34,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:48:34,737 INFO L93 Difference]: Finished difference Result 137 states and 165 transitions. [2020-12-21 21:48:34,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-21 21:48:34,738 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 41 [2020-12-21 21:48:34,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:48:34,739 INFO L225 Difference]: With dead ends: 137 [2020-12-21 21:48:34,739 INFO L226 Difference]: Without dead ends: 108 [2020-12-21 21:48:34,740 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-12-21 21:48:34,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-12-21 21:48:34,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 49. [2020-12-21 21:48:34,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-12-21 21:48:34,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 59 transitions. [2020-12-21 21:48:34,747 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 59 transitions. Word has length 41 [2020-12-21 21:48:34,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:48:34,747 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 59 transitions. [2020-12-21 21:48:34,747 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-21 21:48:34,747 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 59 transitions. [2020-12-21 21:48:34,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-21 21:48:34,749 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:48:34,749 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:48:34,964 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:48:34,965 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:48:34,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:48:34,966 INFO L82 PathProgramCache]: Analyzing trace with hash -1441922881, now seen corresponding path program 7 times [2020-12-21 21:48:34,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:48:34,967 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125634178] [2020-12-21 21:48:34,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:48:34,984 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 21:48:34,984 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [341542703] [2020-12-21 21:48:34,984 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-21 21:48:35,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-21 21:48:35,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-21 21:48:35,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:48:35,172 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-12-21 21:48:35,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125634178] [2020-12-21 21:48:35,172 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 21:48:35,173 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341542703] [2020-12-21 21:48:35,173 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 21:48:35,173 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-12-21 21:48:35,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878602986] [2020-12-21 21:48:35,174 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-21 21:48:35,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:48:35,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-21 21:48:35,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-21 21:48:35,175 INFO L87 Difference]: Start difference. First operand 49 states and 59 transitions. Second operand 10 states. [2020-12-21 21:48:35,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:48:35,339 INFO L93 Difference]: Finished difference Result 153 states and 184 transitions. [2020-12-21 21:48:35,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-21 21:48:35,339 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 46 [2020-12-21 21:48:35,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:48:35,340 INFO L225 Difference]: With dead ends: 153 [2020-12-21 21:48:35,341 INFO L226 Difference]: Without dead ends: 121 [2020-12-21 21:48:35,341 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-12-21 21:48:35,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-12-21 21:48:35,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 54. [2020-12-21 21:48:35,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-12-21 21:48:35,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 65 transitions. [2020-12-21 21:48:35,348 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 65 transitions. Word has length 46 [2020-12-21 21:48:35,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:48:35,348 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 65 transitions. [2020-12-21 21:48:35,348 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-21 21:48:35,348 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 65 transitions. [2020-12-21 21:48:35,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-12-21 21:48:35,350 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:48:35,350 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:48:35,564 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-21 21:48:35,564 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:48:35,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:48:35,565 INFO L82 PathProgramCache]: Analyzing trace with hash -1095979865, now seen corresponding path program 8 times [2020-12-21 21:48:35,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:48:35,566 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168421993] [2020-12-21 21:48:35,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:48:35,582 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 21:48:35,582 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1255449151] [2020-12-21 21:48:35,583 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 [2020-12-21 21:48:35,654 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-21 21:48:35,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-21 21:48:35,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-21 21:48:35,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-21 21:48:35,788 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2020-12-21 21:48:35,789 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168421993] [2020-12-21 21:48:35,789 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-21 21:48:35,789 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255449151] [2020-12-21 21:48:35,790 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-21 21:48:35,790 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-12-21 21:48:35,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923038909] [2020-12-21 21:48:35,791 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-21 21:48:35,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-21 21:48:35,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-21 21:48:35,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-21 21:48:35,792 INFO L87 Difference]: Start difference. First operand 54 states and 65 transitions. Second operand 11 states. [2020-12-21 21:48:36,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-21 21:48:36,060 INFO L93 Difference]: Finished difference Result 169 states and 203 transitions. [2020-12-21 21:48:36,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-21 21:48:36,061 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 51 [2020-12-21 21:48:36,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-21 21:48:36,062 INFO L225 Difference]: With dead ends: 169 [2020-12-21 21:48:36,063 INFO L226 Difference]: Without dead ends: 134 [2020-12-21 21:48:36,065 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-12-21 21:48:36,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-12-21 21:48:36,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 59. [2020-12-21 21:48:36,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-12-21 21:48:36,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 71 transitions. [2020-12-21 21:48:36,083 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 71 transitions. Word has length 51 [2020-12-21 21:48:36,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-21 21:48:36,085 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 71 transitions. [2020-12-21 21:48:36,085 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-21 21:48:36,085 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 71 transitions. [2020-12-21 21:48:36,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-12-21 21:48:36,087 INFO L414 BasicCegarLoop]: Found error trace [2020-12-21 21:48:36,088 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-21 21:48:36,294 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-12-21 21:48:36,295 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-21 21:48:36,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-21 21:48:36,296 INFO L82 PathProgramCache]: Analyzing trace with hash -957530109, now seen corresponding path program 9 times [2020-12-21 21:48:36,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-21 21:48:36,297 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033994801] [2020-12-21 21:48:36,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-21 21:48:36,314 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-21 21:48:36,314 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2012179721] [2020-12-21 21:48:36,315 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