/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/mannadiv_unwindbound100.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 05:36:51,059 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 05:36:51,062 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 05:36:51,117 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-12-22 05:36:51,221 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 05:36:51,223 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 05:36:51,224 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 05:36:51,225 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 05:36:51,283 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 05:36:51,283 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 05:36:51,288 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 05:36:51,288 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 05:36:51,289 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 05:36:51,289 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 05:36:51,289 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 05:36:51,289 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 05:36:51,290 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 05:36:51,290 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 05:36:51,291 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 05:36:51,292 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 05:36:51,292 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 05:36:51,292 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 05:36:51,293 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 05:36:51,293 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 05:36:51,293 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 05:36:51,293 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 05:36:51,294 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 05:36:51,294 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 05:36:51,294 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 05:36:51,295 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 05:36:51,295 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 05:36:51,295 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 05:36:51,295 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 05:36:51,296 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 05:36:51,731 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 05:36:51,761 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 05:36:51,765 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 05:36:51,766 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 05:36:51,767 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 05:36:51,768 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/nla-digbench-scaling/mannadiv_unwindbound100.c [2020-12-22 05:36:51,849 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/56b0f4702/760f59b524df451a94876d217b9976e2/FLAG50678d58e [2020-12-22 05:36:52,488 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 05:36:52,488 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/nla-digbench-scaling/mannadiv_unwindbound100.c [2020-12-22 05:36:52,496 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/56b0f4702/760f59b524df451a94876d217b9976e2/FLAG50678d58e [2020-12-22 05:36:52,868 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/56b0f4702/760f59b524df451a94876d217b9976e2 [2020-12-22 05:36:52,871 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 05:36:52,873 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 05:36:52,878 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 05:36:52,878 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 05:36:52,882 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 05:36:52,883 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 05:36:52" (1/1) ... [2020-12-22 05:36:52,886 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a252990 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:36:52, skipping insertion in model container [2020-12-22 05:36:52,886 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 05:36:52" (1/1) ... [2020-12-22 05:36:52,895 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 05:36:52,914 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 05:36:53,072 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/mannadiv_unwindbound100.c[573,586] [2020-12-22 05:36:53,087 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 05:36:53,098 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 05:36:53,112 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/mannadiv_unwindbound100.c[573,586] [2020-12-22 05:36:53,118 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 05:36:53,135 INFO L208 MainTranslator]: Completed translation [2020-12-22 05:36:53,135 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:36:53 WrapperNode [2020-12-22 05:36:53,135 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 05:36:53,137 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 05:36:53,137 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 05:36:53,137 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 05:36:53,146 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:36:53" (1/1) ... [2020-12-22 05:36:53,154 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:36:53" (1/1) ... [2020-12-22 05:36:53,176 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 05:36:53,177 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 05:36:53,178 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 05:36:53,178 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 05:36:53,188 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:36:53" (1/1) ... [2020-12-22 05:36:53,188 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:36:53" (1/1) ... [2020-12-22 05:36:53,190 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:36:53" (1/1) ... [2020-12-22 05:36:53,190 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:36:53" (1/1) ... [2020-12-22 05:36:53,194 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:36:53" (1/1) ... [2020-12-22 05:36:53,199 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:36:53" (1/1) ... [2020-12-22 05:36:53,201 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:36:53" (1/1) ... [2020-12-22 05:36:53,203 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 05:36:53,204 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 05:36:53,204 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 05:36:53,204 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 05:36:53,205 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:36:53" (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 05:36:53,311 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 05:36:53,311 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 05:36:53,311 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 05:36:53,311 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 05:36:53,559 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 05:36:53,560 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2020-12-22 05:36:53,561 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 05:36:53 BoogieIcfgContainer [2020-12-22 05:36:53,562 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 05:36:53,563 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 05:36:53,564 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 05:36:53,567 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 05:36:53,567 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 05:36:52" (1/3) ... [2020-12-22 05:36:53,568 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ddabba1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 05:36:53, skipping insertion in model container [2020-12-22 05:36:53,568 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 05:36:53" (2/3) ... [2020-12-22 05:36:53,569 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ddabba1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 05:36:53, skipping insertion in model container [2020-12-22 05:36:53,569 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 05:36:53" (3/3) ... [2020-12-22 05:36:53,571 INFO L111 eAbstractionObserver]: Analyzing ICFG mannadiv_unwindbound100.c [2020-12-22 05:36:53,578 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 05:36:53,584 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2020-12-22 05:36:53,608 INFO L253 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2020-12-22 05:36:53,698 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 05:36:53,699 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 05:36:53,699 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 05:36:53,699 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 05:36:53,700 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 05:36:53,700 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 05:36:53,700 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 05:36:53,700 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 05:36:53,738 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2020-12-22 05:36:53,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-22 05:36:53,745 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:36:53,746 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:36:53,747 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:36:53,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:36:53,755 INFO L82 PathProgramCache]: Analyzing trace with hash -1235340721, now seen corresponding path program 1 times [2020-12-22 05:36:53,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:36:53,769 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949077981] [2020-12-22 05:36:53,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:36:53,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:36:54,064 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 05:36:54,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949077981] [2020-12-22 05:36:54,067 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 05:36:54,067 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 05:36:54,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415545341] [2020-12-22 05:36:54,076 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 05:36:54,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:36:54,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 05:36:54,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 05:36:54,109 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 2 states. [2020-12-22 05:36:54,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:36:54,134 INFO L93 Difference]: Finished difference Result 39 states and 52 transitions. [2020-12-22 05:36:54,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 05:36:54,136 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-12-22 05:36:54,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:36:54,163 INFO L225 Difference]: With dead ends: 39 [2020-12-22 05:36:54,163 INFO L226 Difference]: Without dead ends: 17 [2020-12-22 05:36:54,174 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 05:36:54,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-12-22 05:36:54,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-12-22 05:36:54,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-12-22 05:36:54,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2020-12-22 05:36:54,217 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 10 [2020-12-22 05:36:54,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:36:54,218 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2020-12-22 05:36:54,218 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 05:36:54,218 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2020-12-22 05:36:54,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-22 05:36:54,219 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:36:54,219 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:36:54,220 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 05:36:54,221 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:36:54,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:36:54,225 INFO L82 PathProgramCache]: Analyzing trace with hash -1988288018, now seen corresponding path program 1 times [2020-12-22 05:36:54,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:36:54,226 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108321656] [2020-12-22 05:36:54,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:36:54,277 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:36:54,277 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [550053229] [2020-12-22 05:36:54,277 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 05:36:54,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:36:54,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-22 05:36:54,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:36:54,548 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 05:36:54,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108321656] [2020-12-22 05:36:54,549 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:36:54,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550053229] [2020-12-22 05:36:54,550 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 05:36:54,550 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-12-22 05:36:54,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954783340] [2020-12-22 05:36:54,552 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 05:36:54,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:36:54,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 05:36:54,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-12-22 05:36:54,554 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand 8 states. [2020-12-22 05:36:54,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:36:54,828 INFO L93 Difference]: Finished difference Result 32 states and 37 transitions. [2020-12-22 05:36:54,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 05:36:54,829 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 10 [2020-12-22 05:36:54,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:36:54,830 INFO L225 Difference]: With dead ends: 32 [2020-12-22 05:36:54,830 INFO L226 Difference]: Without dead ends: 30 [2020-12-22 05:36:54,832 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2020-12-22 05:36:54,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-12-22 05:36:54,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 20. [2020-12-22 05:36:54,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-12-22 05:36:54,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2020-12-22 05:36:54,838 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 10 [2020-12-22 05:36:54,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:36:54,839 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2020-12-22 05:36:54,839 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 05:36:54,839 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2020-12-22 05:36:54,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-22 05:36:54,840 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:36:54,840 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:36:55,054 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-22 05:36:55,055 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:36:55,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:36:55,057 INFO L82 PathProgramCache]: Analyzing trace with hash -1507424085, now seen corresponding path program 1 times [2020-12-22 05:36:55,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:36:55,058 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964450133] [2020-12-22 05:36:55,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:36:55,076 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:36:55,076 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1455643603] [2020-12-22 05:36:55,076 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 05:36:55,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:36:55,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-22 05:36:55,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:36:55,188 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 05:36:55,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964450133] [2020-12-22 05:36:55,192 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:36:55,193 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455643603] [2020-12-22 05:36:55,194 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 05:36:55,194 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 05:36:55,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38489607] [2020-12-22 05:36:55,195 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 05:36:55,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:36:55,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 05:36:55,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 05:36:55,199 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand 4 states. [2020-12-22 05:36:55,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:36:55,224 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2020-12-22 05:36:55,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 05:36:55,224 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2020-12-22 05:36:55,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:36:55,226 INFO L225 Difference]: With dead ends: 24 [2020-12-22 05:36:55,226 INFO L226 Difference]: Without dead ends: 20 [2020-12-22 05:36:55,227 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 05:36:55,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-12-22 05:36:55,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-12-22 05:36:55,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-12-22 05:36:55,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2020-12-22 05:36:55,239 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 11 [2020-12-22 05:36:55,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:36:55,240 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2020-12-22 05:36:55,240 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 05:36:55,240 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2020-12-22 05:36:55,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 05:36:55,241 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:36:55,241 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:36:55,456 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:36:55,457 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:36:55,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:36:55,458 INFO L82 PathProgramCache]: Analyzing trace with hash -1189458428, now seen corresponding path program 1 times [2020-12-22 05:36:55,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:36:55,460 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975629744] [2020-12-22 05:36:55,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:36:55,495 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:36:55,496 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [741533619] [2020-12-22 05:36:55,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:36:55,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:36:55,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-22 05:36:55,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:36:55,727 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 05:36:55,728 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975629744] [2020-12-22 05:36:55,728 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:36:55,728 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741533619] [2020-12-22 05:36:55,729 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 05:36:55,729 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-12-22 05:36:55,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257623272] [2020-12-22 05:36:55,730 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 05:36:55,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:36:55,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 05:36:55,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-12-22 05:36:55,733 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand 9 states. [2020-12-22 05:36:55,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:36:55,868 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2020-12-22 05:36:55,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 05:36:55,869 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-12-22 05:36:55,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:36:55,870 INFO L225 Difference]: With dead ends: 24 [2020-12-22 05:36:55,870 INFO L226 Difference]: Without dead ends: 18 [2020-12-22 05:36:55,870 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2020-12-22 05:36:55,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-12-22 05:36:55,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2020-12-22 05:36:55,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-12-22 05:36:55,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2020-12-22 05:36:55,874 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 13 [2020-12-22 05:36:55,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:36:55,875 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2020-12-22 05:36:55,875 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 05:36:55,875 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2020-12-22 05:36:55,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-22 05:36:55,876 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:36:55,876 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:36:56,091 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:36:56,092 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:36:56,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:36:56,094 INFO L82 PathProgramCache]: Analyzing trace with hash -132612007, now seen corresponding path program 1 times [2020-12-22 05:36:56,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:36:56,095 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332391115] [2020-12-22 05:36:56,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:36:56,109 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:36:56,109 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1449621797] [2020-12-22 05:36:56,109 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 05:36:56,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:36:56,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-22 05:36:56,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:36:56,189 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 05:36:56,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332391115] [2020-12-22 05:36:56,189 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:36:56,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449621797] [2020-12-22 05:36:56,190 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:36:56,190 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-12-22 05:36:56,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666869927] [2020-12-22 05:36:56,191 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 05:36:56,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:36:56,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 05:36:56,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 05:36:56,192 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 5 states. [2020-12-22 05:36:56,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:36:56,216 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2020-12-22 05:36:56,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 05:36:56,216 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-12-22 05:36:56,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:36:56,217 INFO L225 Difference]: With dead ends: 26 [2020-12-22 05:36:56,217 INFO L226 Difference]: Without dead ends: 22 [2020-12-22 05:36:56,218 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-22 05:36:56,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-12-22 05:36:56,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-12-22 05:36:56,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-12-22 05:36:56,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2020-12-22 05:36:56,223 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 16 [2020-12-22 05:36:56,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:36:56,223 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2020-12-22 05:36:56,224 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 05:36:56,224 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2020-12-22 05:36:56,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-22 05:36:56,224 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:36:56,225 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:36:56,438 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:36:56,439 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:36:56,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:36:56,441 INFO L82 PathProgramCache]: Analyzing trace with hash -625728149, now seen corresponding path program 2 times [2020-12-22 05:36:56,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:36:56,442 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606971546] [2020-12-22 05:36:56,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:36:56,460 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:36:56,460 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1399964585] [2020-12-22 05:36:56,460 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:36:56,508 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 05:36:56,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 05:36:56,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-22 05:36:56,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:36:56,580 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:36:56,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606971546] [2020-12-22 05:36:56,581 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:36:56,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399964585] [2020-12-22 05:36:56,583 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:36:56,584 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-12-22 05:36:56,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695731682] [2020-12-22 05:36:56,590 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 05:36:56,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:36:56,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 05:36:56,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-22 05:36:56,592 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand 6 states. [2020-12-22 05:36:56,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:36:56,645 INFO L93 Difference]: Finished difference Result 31 states and 34 transitions. [2020-12-22 05:36:56,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 05:36:56,646 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2020-12-22 05:36:56,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:36:56,650 INFO L225 Difference]: With dead ends: 31 [2020-12-22 05:36:56,650 INFO L226 Difference]: Without dead ends: 27 [2020-12-22 05:36:56,651 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-22 05:36:56,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-12-22 05:36:56,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-12-22 05:36:56,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-12-22 05:36:56,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2020-12-22 05:36:56,666 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 21 [2020-12-22 05:36:56,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:36:56,667 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2020-12-22 05:36:56,667 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 05:36:56,667 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2020-12-22 05:36:56,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-22 05:36:56,668 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:36:56,668 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:36:56,884 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-22 05:36:56,885 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:36:56,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:36:56,886 INFO L82 PathProgramCache]: Analyzing trace with hash 256826265, now seen corresponding path program 3 times [2020-12-22 05:36:56,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:36:56,887 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699759653] [2020-12-22 05:36:56,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:36:56,901 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:36:56,901 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [222399298] [2020-12-22 05:36:56,901 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:36:56,966 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-22 05:36:56,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 05:36:56,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-22 05:36:56,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:36:57,053 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:36:57,053 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699759653] [2020-12-22 05:36:57,054 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:36:57,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222399298] [2020-12-22 05:36:57,054 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:36:57,054 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-12-22 05:36:57,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899359117] [2020-12-22 05:36:57,055 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 05:36:57,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:36:57,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 05:36:57,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 05:36:57,056 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand 7 states. [2020-12-22 05:36:57,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:36:57,138 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2020-12-22 05:36:57,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 05:36:57,138 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2020-12-22 05:36:57,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:36:57,139 INFO L225 Difference]: With dead ends: 36 [2020-12-22 05:36:57,139 INFO L226 Difference]: Without dead ends: 32 [2020-12-22 05:36:57,140 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2020-12-22 05:36:57,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-12-22 05:36:57,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-12-22 05:36:57,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-12-22 05:36:57,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2020-12-22 05:36:57,146 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 26 [2020-12-22 05:36:57,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:36:57,147 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2020-12-22 05:36:57,147 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 05:36:57,147 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2020-12-22 05:36:57,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-12-22 05:36:57,148 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:36:57,148 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:36:57,361 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:36:57,362 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:36:57,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:36:57,363 INFO L82 PathProgramCache]: Analyzing trace with hash -1955278293, now seen corresponding path program 4 times [2020-12-22 05:36:57,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:36:57,364 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570942412] [2020-12-22 05:36:57,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:36:57,380 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:36:57,380 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1684653177] [2020-12-22 05:36:57,380 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 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 [2020-12-22 05:36:57,440 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 05:36:57,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 05:36:57,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-22 05:36:57,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:36:57,547 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:36:57,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570942412] [2020-12-22 05:36:57,548 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:36:57,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684653177] [2020-12-22 05:36:57,548 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:36:57,549 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-12-22 05:36:57,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149767095] [2020-12-22 05:36:57,549 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 05:36:57,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:36:57,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 05:36:57,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-12-22 05:36:57,550 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand 8 states. [2020-12-22 05:36:57,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:36:57,615 INFO L93 Difference]: Finished difference Result 41 states and 46 transitions. [2020-12-22 05:36:57,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-22 05:36:57,616 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2020-12-22 05:36:57,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:36:57,616 INFO L225 Difference]: With dead ends: 41 [2020-12-22 05:36:57,617 INFO L226 Difference]: Without dead ends: 37 [2020-12-22 05:36:57,617 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2020-12-22 05:36:57,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-12-22 05:36:57,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-12-22 05:36:57,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-12-22 05:36:57,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2020-12-22 05:36:57,624 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 31 [2020-12-22 05:36:57,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:36:57,625 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2020-12-22 05:36:57,625 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 05:36:57,625 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2020-12-22 05:36:57,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-12-22 05:36:57,626 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:36:57,626 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:36:57,839 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:36:57,840 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:36:57,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:36:57,841 INFO L82 PathProgramCache]: Analyzing trace with hash -1615059239, now seen corresponding path program 5 times [2020-12-22 05:36:57,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:36:57,842 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222911365] [2020-12-22 05:36:57,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:36:57,854 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:36:57,855 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [533560385] [2020-12-22 05:36:57,855 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 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 [2020-12-22 05:36:57,919 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-12-22 05:36:57,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 05:36:57,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 05:36:57,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:36:58,015 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:36:58,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222911365] [2020-12-22 05:36:58,015 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:36:58,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533560385] [2020-12-22 05:36:58,016 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:36:58,016 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-12-22 05:36:58,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892252917] [2020-12-22 05:36:58,017 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 05:36:58,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:36:58,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 05:36:58,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-12-22 05:36:58,018 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand 9 states. [2020-12-22 05:36:58,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:36:58,097 INFO L93 Difference]: Finished difference Result 46 states and 52 transitions. [2020-12-22 05:36:58,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-22 05:36:58,098 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 36 [2020-12-22 05:36:58,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:36:58,098 INFO L225 Difference]: With dead ends: 46 [2020-12-22 05:36:58,099 INFO L226 Difference]: Without dead ends: 42 [2020-12-22 05:36:58,099 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2020-12-22 05:36:58,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-12-22 05:36:58,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-12-22 05:36:58,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-12-22 05:36:58,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2020-12-22 05:36:58,106 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 36 [2020-12-22 05:36:58,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:36:58,107 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2020-12-22 05:36:58,107 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 05:36:58,107 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2020-12-22 05:36:58,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-12-22 05:36:58,108 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:36:58,108 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:36:58,322 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-12-22 05:36:58,323 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:36:58,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:36:58,324 INFO L82 PathProgramCache]: Analyzing trace with hash -1613459733, now seen corresponding path program 6 times [2020-12-22 05:36:58,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:36:58,325 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968626214] [2020-12-22 05:36:58,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:36:58,337 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:36:58,337 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1599972412] [2020-12-22 05:36:58,337 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 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 [2020-12-22 05:36:58,433 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-12-22 05:36:58,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 05:36:58,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-22 05:36:58,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:36:58,556 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:36:58,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968626214] [2020-12-22 05:36:58,556 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:36:58,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599972412] [2020-12-22 05:36:58,569 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:36:58,569 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-12-22 05:36:58,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748725820] [2020-12-22 05:36:58,570 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 05:36:58,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:36:58,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 05:36:58,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-12-22 05:36:58,570 INFO L87 Difference]: Start difference. First operand 42 states and 48 transitions. Second operand 10 states. [2020-12-22 05:36:58,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:36:58,671 INFO L93 Difference]: Finished difference Result 51 states and 58 transitions. [2020-12-22 05:36:58,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-22 05:36:58,672 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 41 [2020-12-22 05:36:58,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:36:58,673 INFO L225 Difference]: With dead ends: 51 [2020-12-22 05:36:58,673 INFO L226 Difference]: Without dead ends: 47 [2020-12-22 05:36:58,673 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=92, Invalid=148, Unknown=0, NotChecked=0, Total=240 [2020-12-22 05:36:58,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-12-22 05:36:58,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2020-12-22 05:36:58,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-12-22 05:36:58,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 54 transitions. [2020-12-22 05:36:58,681 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 54 transitions. Word has length 41 [2020-12-22 05:36:58,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:36:58,681 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 54 transitions. [2020-12-22 05:36:58,681 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 05:36:58,682 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 54 transitions. [2020-12-22 05:36:58,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-12-22 05:36:58,683 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:36:58,683 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:36:58,898 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:36:58,899 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:36:58,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:36:58,900 INFO L82 PathProgramCache]: Analyzing trace with hash -2055970279, now seen corresponding path program 7 times [2020-12-22 05:36:58,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:36:58,901 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120492481] [2020-12-22 05:36:58,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:36:58,913 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:36:58,913 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [757225868] [2020-12-22 05:36:58,914 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:36:58,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:36:58,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-22 05:36:59,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:36:59,139 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:36:59,139 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120492481] [2020-12-22 05:36:59,140 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:36:59,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757225868] [2020-12-22 05:36:59,140 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:36:59,140 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-12-22 05:36:59,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884882736] [2020-12-22 05:36:59,141 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-22 05:36:59,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:36:59,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-22 05:36:59,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-12-22 05:36:59,142 INFO L87 Difference]: Start difference. First operand 47 states and 54 transitions. Second operand 11 states. [2020-12-22 05:36:59,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:36:59,251 INFO L93 Difference]: Finished difference Result 56 states and 64 transitions. [2020-12-22 05:36:59,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-22 05:36:59,251 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 46 [2020-12-22 05:36:59,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:36:59,252 INFO L225 Difference]: With dead ends: 56 [2020-12-22 05:36:59,252 INFO L226 Difference]: Without dead ends: 52 [2020-12-22 05:36:59,253 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=117, Invalid=189, Unknown=0, NotChecked=0, Total=306 [2020-12-22 05:36:59,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-12-22 05:36:59,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-12-22 05:36:59,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-12-22 05:36:59,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 60 transitions. [2020-12-22 05:36:59,261 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 60 transitions. Word has length 46 [2020-12-22 05:36:59,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:36:59,261 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 60 transitions. [2020-12-22 05:36:59,261 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-22 05:36:59,261 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 60 transitions. [2020-12-22 05:36:59,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-12-22 05:36:59,262 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:36:59,262 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:36:59,475 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:36:59,476 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:36:59,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:36:59,478 INFO L82 PathProgramCache]: Analyzing trace with hash -1472242773, now seen corresponding path program 8 times [2020-12-22 05:36:59,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:36:59,478 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421399136] [2020-12-22 05:36:59,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:36:59,489 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:36:59,489 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1542717305] [2020-12-22 05:36:59,490 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:36:59,559 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 05:36:59,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 05:36:59,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-22 05:36:59,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:36:59,721 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:36:59,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421399136] [2020-12-22 05:36:59,722 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:36:59,722 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542717305] [2020-12-22 05:36:59,722 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:36:59,722 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-12-22 05:36:59,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854760603] [2020-12-22 05:36:59,723 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 05:36:59,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:36:59,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 05:36:59,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-12-22 05:36:59,724 INFO L87 Difference]: Start difference. First operand 52 states and 60 transitions. Second operand 12 states. [2020-12-22 05:36:59,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:36:59,868 INFO L93 Difference]: Finished difference Result 61 states and 70 transitions. [2020-12-22 05:36:59,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-22 05:36:59,868 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 51 [2020-12-22 05:36:59,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:36:59,869 INFO L225 Difference]: With dead ends: 61 [2020-12-22 05:36:59,869 INFO L226 Difference]: Without dead ends: 57 [2020-12-22 05:36:59,870 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=145, Invalid=235, Unknown=0, NotChecked=0, Total=380 [2020-12-22 05:36:59,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-12-22 05:36:59,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-12-22 05:36:59,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-12-22 05:36:59,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 66 transitions. [2020-12-22 05:36:59,879 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 66 transitions. Word has length 51 [2020-12-22 05:36:59,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:36:59,880 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 66 transitions. [2020-12-22 05:36:59,880 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-22 05:36:59,880 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 66 transitions. [2020-12-22 05:36:59,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-12-22 05:36:59,881 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:36:59,881 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:37:00,094 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-12-22 05:37:00,095 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:37:00,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:37:00,096 INFO L82 PathProgramCache]: Analyzing trace with hash -1819570855, now seen corresponding path program 9 times [2020-12-22 05:37:00,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:37:00,096 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533228826] [2020-12-22 05:37:00,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:37:00,108 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:37:00,108 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1125027628] [2020-12-22 05:37:00,109 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:37:00,214 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-12-22 05:37:00,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 05:37:00,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-22 05:37:00,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:37:00,404 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:37:00,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533228826] [2020-12-22 05:37:00,404 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:37:00,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125027628] [2020-12-22 05:37:00,405 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:37:00,405 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-12-22 05:37:00,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813121703] [2020-12-22 05:37:00,405 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-22 05:37:00,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:37:00,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-22 05:37:00,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-12-22 05:37:00,406 INFO L87 Difference]: Start difference. First operand 57 states and 66 transitions. Second operand 13 states. [2020-12-22 05:37:00,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:37:00,552 INFO L93 Difference]: Finished difference Result 66 states and 76 transitions. [2020-12-22 05:37:00,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-22 05:37:00,552 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 56 [2020-12-22 05:37:00,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:37:00,553 INFO L225 Difference]: With dead ends: 66 [2020-12-22 05:37:00,553 INFO L226 Difference]: Without dead ends: 62 [2020-12-22 05:37:00,554 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=176, Invalid=286, Unknown=0, NotChecked=0, Total=462 [2020-12-22 05:37:00,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-12-22 05:37:00,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2020-12-22 05:37:00,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-12-22 05:37:00,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 72 transitions. [2020-12-22 05:37:00,563 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 72 transitions. Word has length 56 [2020-12-22 05:37:00,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:37:00,563 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 72 transitions. [2020-12-22 05:37:00,563 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-22 05:37:00,563 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 72 transitions. [2020-12-22 05:37:00,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-12-22 05:37:00,564 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:37:00,564 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:37:00,778 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-22 05:37:00,779 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:37:00,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:37:00,780 INFO L82 PathProgramCache]: Analyzing trace with hash -1641990037, now seen corresponding path program 10 times [2020-12-22 05:37:00,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:37:00,780 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244214639] [2020-12-22 05:37:00,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:37:00,792 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:37:00,792 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [497242382] [2020-12-22 05:37:00,792 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:37:00,869 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 05:37:00,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 05:37:00,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-22 05:37:00,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:37:01,140 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:37:01,141 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244214639] [2020-12-22 05:37:01,141 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:37:01,141 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497242382] [2020-12-22 05:37:01,141 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:37:01,142 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-12-22 05:37:01,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130495621] [2020-12-22 05:37:01,142 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-22 05:37:01,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:37:01,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-22 05:37:01,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-12-22 05:37:01,144 INFO L87 Difference]: Start difference. First operand 62 states and 72 transitions. Second operand 14 states. [2020-12-22 05:37:01,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:37:01,319 INFO L93 Difference]: Finished difference Result 71 states and 82 transitions. [2020-12-22 05:37:01,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-22 05:37:01,319 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 61 [2020-12-22 05:37:01,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:37:01,320 INFO L225 Difference]: With dead ends: 71 [2020-12-22 05:37:01,320 INFO L226 Difference]: Without dead ends: 67 [2020-12-22 05:37:01,321 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=342, Unknown=0, NotChecked=0, Total=552 [2020-12-22 05:37:01,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-12-22 05:37:01,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2020-12-22 05:37:01,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-12-22 05:37:01,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 78 transitions. [2020-12-22 05:37:01,331 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 78 transitions. Word has length 61 [2020-12-22 05:37:01,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:37:01,331 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 78 transitions. [2020-12-22 05:37:01,331 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-22 05:37:01,331 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 78 transitions. [2020-12-22 05:37:01,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 05:37:01,332 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:37:01,332 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:37:01,546 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-22 05:37:01,547 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:37:01,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:37:01,548 INFO L82 PathProgramCache]: Analyzing trace with hash -736778087, now seen corresponding path program 11 times [2020-12-22 05:37:01,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:37:01,548 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953174233] [2020-12-22 05:37:01,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:37:01,574 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:37:01,574 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1617587269] [2020-12-22 05:37:01,574 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 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:37:01,680 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-12-22 05:37:01,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 05:37:01,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-22 05:37:01,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:37:01,897 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 0 proven. 297 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:37:01,897 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953174233] [2020-12-22 05:37:01,897 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:37:01,898 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617587269] [2020-12-22 05:37:01,898 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:37:01,898 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-12-22 05:37:01,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942085009] [2020-12-22 05:37:01,898 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-22 05:37:01,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:37:01,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-22 05:37:01,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-12-22 05:37:01,899 INFO L87 Difference]: Start difference. First operand 67 states and 78 transitions. Second operand 15 states. [2020-12-22 05:37:02,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:37:02,105 INFO L93 Difference]: Finished difference Result 76 states and 88 transitions. [2020-12-22 05:37:02,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-22 05:37:02,106 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 66 [2020-12-22 05:37:02,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:37:02,107 INFO L225 Difference]: With dead ends: 76 [2020-12-22 05:37:02,107 INFO L226 Difference]: Without dead ends: 72 [2020-12-22 05:37:02,110 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=247, Invalid=403, Unknown=0, NotChecked=0, Total=650 [2020-12-22 05:37:02,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-12-22 05:37:02,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2020-12-22 05:37:02,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-12-22 05:37:02,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 84 transitions. [2020-12-22 05:37:02,120 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 84 transitions. Word has length 66 [2020-12-22 05:37:02,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:37:02,120 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 84 transitions. [2020-12-22 05:37:02,120 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-22 05:37:02,120 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 84 transitions. [2020-12-22 05:37:02,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-12-22 05:37:02,126 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:37:02,126 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:37:02,335 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:37:02,335 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:37:02,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:37:02,337 INFO L82 PathProgramCache]: Analyzing trace with hash -1545198293, now seen corresponding path program 12 times [2020-12-22 05:37:02,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:37:02,338 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621880922] [2020-12-22 05:37:02,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:37:02,362 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:37:02,362 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [525602262] [2020-12-22 05:37:02,362 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:37:02,491 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-12-22 05:37:02,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 05:37:02,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 297 conjuncts, 27 conjunts are in the unsatisfiable core [2020-12-22 05:37:02,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:37:02,740 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:37:02,740 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621880922] [2020-12-22 05:37:02,740 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:37:02,740 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525602262] [2020-12-22 05:37:02,741 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:37:02,741 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-12-22 05:37:02,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903830425] [2020-12-22 05:37:02,741 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 05:37:02,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:37:02,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 05:37:02,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-12-22 05:37:02,743 INFO L87 Difference]: Start difference. First operand 72 states and 84 transitions. Second operand 16 states. [2020-12-22 05:37:02,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:37:02,984 INFO L93 Difference]: Finished difference Result 81 states and 94 transitions. [2020-12-22 05:37:02,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-22 05:37:02,985 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 71 [2020-12-22 05:37:02,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:37:02,986 INFO L225 Difference]: With dead ends: 81 [2020-12-22 05:37:02,987 INFO L226 Difference]: Without dead ends: 77 [2020-12-22 05:37:02,987 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=287, Invalid=469, Unknown=0, NotChecked=0, Total=756 [2020-12-22 05:37:02,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-12-22 05:37:02,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2020-12-22 05:37:02,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-12-22 05:37:02,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 90 transitions. [2020-12-22 05:37:03,000 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 90 transitions. Word has length 71 [2020-12-22 05:37:03,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:37:03,001 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 90 transitions. [2020-12-22 05:37:03,002 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 05:37:03,002 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 90 transitions. [2020-12-22 05:37:03,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-12-22 05:37:03,002 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:37:03,003 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:37:03,217 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-22 05:37:03,218 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:37:03,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:37:03,218 INFO L82 PathProgramCache]: Analyzing trace with hash -936987687, now seen corresponding path program 13 times [2020-12-22 05:37:03,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:37:03,219 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454856286] [2020-12-22 05:37:03,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:37:03,229 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:37:03,229 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1674316323] [2020-12-22 05:37:03,229 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:37:03,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:37:03,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 29 conjunts are in the unsatisfiable core [2020-12-22 05:37:03,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:37:03,585 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 416 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:37:03,585 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454856286] [2020-12-22 05:37:03,585 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:37:03,585 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674316323] [2020-12-22 05:37:03,586 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:37:03,586 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-12-22 05:37:03,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582202134] [2020-12-22 05:37:03,590 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 05:37:03,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:37:03,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 05:37:03,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-12-22 05:37:03,591 INFO L87 Difference]: Start difference. First operand 77 states and 90 transitions. Second operand 17 states. [2020-12-22 05:37:03,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:37:03,818 INFO L93 Difference]: Finished difference Result 86 states and 100 transitions. [2020-12-22 05:37:03,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-22 05:37:03,819 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 76 [2020-12-22 05:37:03,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:37:03,819 INFO L225 Difference]: With dead ends: 86 [2020-12-22 05:37:03,820 INFO L226 Difference]: Without dead ends: 82 [2020-12-22 05:37:03,821 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=330, Invalid=540, Unknown=0, NotChecked=0, Total=870 [2020-12-22 05:37:03,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-12-22 05:37:03,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2020-12-22 05:37:03,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-12-22 05:37:03,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 96 transitions. [2020-12-22 05:37:03,829 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 96 transitions. Word has length 76 [2020-12-22 05:37:03,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:37:03,830 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 96 transitions. [2020-12-22 05:37:03,830 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 05:37:03,830 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 96 transitions. [2020-12-22 05:37:03,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-12-22 05:37:03,831 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:37:03,831 INFO L422 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:37:04,045 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-22 05:37:04,046 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:37:04,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:37:04,047 INFO L82 PathProgramCache]: Analyzing trace with hash -990240277, now seen corresponding path program 14 times [2020-12-22 05:37:04,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:37:04,047 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837446309] [2020-12-22 05:37:04,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:37:04,056 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:37:04,057 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2129438000] [2020-12-22 05:37:04,057 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:37:04,153 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 05:37:04,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 05:37:04,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 31 conjunts are in the unsatisfiable core [2020-12-22 05:37:04,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:37:04,450 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 0 proven. 483 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:37:04,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837446309] [2020-12-22 05:37:04,450 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:37:04,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129438000] [2020-12-22 05:37:04,451 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:37:04,451 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-12-22 05:37:04,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075578732] [2020-12-22 05:37:04,453 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-22 05:37:04,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:37:04,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-22 05:37:04,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-12-22 05:37:04,455 INFO L87 Difference]: Start difference. First operand 82 states and 96 transitions. Second operand 18 states. [2020-12-22 05:37:04,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:37:04,706 INFO L93 Difference]: Finished difference Result 91 states and 106 transitions. [2020-12-22 05:37:04,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-22 05:37:04,707 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 81 [2020-12-22 05:37:04,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:37:04,708 INFO L225 Difference]: With dead ends: 91 [2020-12-22 05:37:04,708 INFO L226 Difference]: Without dead ends: 87 [2020-12-22 05:37:04,709 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=376, Invalid=616, Unknown=0, NotChecked=0, Total=992 [2020-12-22 05:37:04,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-12-22 05:37:04,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2020-12-22 05:37:04,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-12-22 05:37:04,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 102 transitions. [2020-12-22 05:37:04,717 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 102 transitions. Word has length 81 [2020-12-22 05:37:04,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:37:04,718 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 102 transitions. [2020-12-22 05:37:04,718 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-22 05:37:04,718 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 102 transitions. [2020-12-22 05:37:04,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-12-22 05:37:04,719 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:37:04,719 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:37:04,932 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-22 05:37:04,933 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:37:04,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:37:04,933 INFO L82 PathProgramCache]: Analyzing trace with hash -1479364839, now seen corresponding path program 15 times [2020-12-22 05:37:04,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:37:04,934 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307075839] [2020-12-22 05:37:04,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:37:04,944 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:37:04,945 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [977366614] [2020-12-22 05:37:04,945 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:37:05,078 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2020-12-22 05:37:05,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 05:37:05,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 33 conjunts are in the unsatisfiable core [2020-12-22 05:37:05,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:37:05,414 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 0 proven. 555 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:37:05,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307075839] [2020-12-22 05:37:05,414 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:37:05,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977366614] [2020-12-22 05:37:05,415 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:37:05,415 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-12-22 05:37:05,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997466974] [2020-12-22 05:37:05,419 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-22 05:37:05,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:37:05,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-22 05:37:05,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-12-22 05:37:05,420 INFO L87 Difference]: Start difference. First operand 87 states and 102 transitions. Second operand 19 states. [2020-12-22 05:37:05,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:37:05,768 INFO L93 Difference]: Finished difference Result 96 states and 112 transitions. [2020-12-22 05:37:05,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-22 05:37:05,768 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 86 [2020-12-22 05:37:05,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:37:05,769 INFO L225 Difference]: With dead ends: 96 [2020-12-22 05:37:05,769 INFO L226 Difference]: Without dead ends: 92 [2020-12-22 05:37:05,770 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=425, Invalid=697, Unknown=0, NotChecked=0, Total=1122 [2020-12-22 05:37:05,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-12-22 05:37:05,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2020-12-22 05:37:05,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-12-22 05:37:05,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 108 transitions. [2020-12-22 05:37:05,778 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 108 transitions. Word has length 86 [2020-12-22 05:37:05,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:37:05,779 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 108 transitions. [2020-12-22 05:37:05,779 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-22 05:37:05,779 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 108 transitions. [2020-12-22 05:37:05,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-12-22 05:37:05,780 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:37:05,780 INFO L422 BasicCegarLoop]: trace histogram [17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:37:05,993 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:37:05,994 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:37:05,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:37:05,995 INFO L82 PathProgramCache]: Analyzing trace with hash -1245106517, now seen corresponding path program 16 times [2020-12-22 05:37:05,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:37:05,995 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913611341] [2020-12-22 05:37:05,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:37:06,004 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:37:06,004 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1792507477] [2020-12-22 05:37:06,005 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:37:06,116 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 05:37:06,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 05:37:06,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 35 conjunts are in the unsatisfiable core [2020-12-22 05:37:06,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:37:06,428 INFO L134 CoverageAnalysis]: Checked inductivity of 632 backedges. 0 proven. 632 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:37:06,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913611341] [2020-12-22 05:37:06,429 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:37:06,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792507477] [2020-12-22 05:37:06,429 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:37:06,429 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-12-22 05:37:06,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741912237] [2020-12-22 05:37:06,430 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-22 05:37:06,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:37:06,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-22 05:37:06,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-12-22 05:37:06,431 INFO L87 Difference]: Start difference. First operand 92 states and 108 transitions. Second operand 20 states. [2020-12-22 05:37:06,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:37:06,771 INFO L93 Difference]: Finished difference Result 101 states and 118 transitions. [2020-12-22 05:37:06,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-12-22 05:37:06,772 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 91 [2020-12-22 05:37:06,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:37:06,773 INFO L225 Difference]: With dead ends: 101 [2020-12-22 05:37:06,773 INFO L226 Difference]: Without dead ends: 97 [2020-12-22 05:37:06,773 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=477, Invalid=783, Unknown=0, NotChecked=0, Total=1260 [2020-12-22 05:37:06,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-12-22 05:37:06,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2020-12-22 05:37:06,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-12-22 05:37:06,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 114 transitions. [2020-12-22 05:37:06,782 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 114 transitions. Word has length 91 [2020-12-22 05:37:06,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:37:06,782 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 114 transitions. [2020-12-22 05:37:06,782 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-22 05:37:06,782 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 114 transitions. [2020-12-22 05:37:06,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-12-22 05:37:06,783 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:37:06,784 INFO L422 BasicCegarLoop]: trace histogram [18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:37:06,997 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:37:06,998 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:37:06,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:37:06,998 INFO L82 PathProgramCache]: Analyzing trace with hash -1574069671, now seen corresponding path program 17 times [2020-12-22 05:37:06,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:37:06,999 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429754697] [2020-12-22 05:37:06,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:37:07,008 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:37:07,008 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [958033728] [2020-12-22 05:37:07,009 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:37:07,145 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2020-12-22 05:37:07,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 05:37:07,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 37 conjunts are in the unsatisfiable core [2020-12-22 05:37:07,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:37:07,477 INFO L134 CoverageAnalysis]: Checked inductivity of 714 backedges. 0 proven. 714 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:37:07,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429754697] [2020-12-22 05:37:07,478 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:37:07,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958033728] [2020-12-22 05:37:07,478 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:37:07,478 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-12-22 05:37:07,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638491911] [2020-12-22 05:37:07,479 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-22 05:37:07,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:37:07,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-22 05:37:07,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-12-22 05:37:07,484 INFO L87 Difference]: Start difference. First operand 97 states and 114 transitions. Second operand 21 states. [2020-12-22 05:37:07,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:37:07,816 INFO L93 Difference]: Finished difference Result 106 states and 124 transitions. [2020-12-22 05:37:07,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-12-22 05:37:07,817 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 96 [2020-12-22 05:37:07,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:37:07,818 INFO L225 Difference]: With dead ends: 106 [2020-12-22 05:37:07,818 INFO L226 Difference]: Without dead ends: 102 [2020-12-22 05:37:07,819 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=532, Invalid=874, Unknown=0, NotChecked=0, Total=1406 [2020-12-22 05:37:07,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-12-22 05:37:07,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2020-12-22 05:37:07,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-12-22 05:37:07,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 120 transitions. [2020-12-22 05:37:07,827 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 120 transitions. Word has length 96 [2020-12-22 05:37:07,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:37:07,827 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 120 transitions. [2020-12-22 05:37:07,827 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-22 05:37:07,827 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 120 transitions. [2020-12-22 05:37:07,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-12-22 05:37:07,828 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:37:07,828 INFO L422 BasicCegarLoop]: trace histogram [19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:37:08,042 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-12-22 05:37:08,043 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:37:08,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:37:08,044 INFO L82 PathProgramCache]: Analyzing trace with hash -1816179861, now seen corresponding path program 18 times [2020-12-22 05:37:08,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:37:08,044 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353904848] [2020-12-22 05:37:08,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:37:08,056 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:37:08,057 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2024783610] [2020-12-22 05:37:08,057 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:37:08,228 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2020-12-22 05:37:08,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 05:37:08,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 39 conjunts are in the unsatisfiable core [2020-12-22 05:37:08,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:37:08,624 INFO L134 CoverageAnalysis]: Checked inductivity of 801 backedges. 0 proven. 801 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:37:08,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353904848] [2020-12-22 05:37:08,624 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:37:08,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024783610] [2020-12-22 05:37:08,624 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:37:08,624 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-12-22 05:37:08,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560409147] [2020-12-22 05:37:08,625 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-22 05:37:08,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:37:08,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-22 05:37:08,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-12-22 05:37:08,626 INFO L87 Difference]: Start difference. First operand 102 states and 120 transitions. Second operand 22 states. [2020-12-22 05:37:09,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:37:09,012 INFO L93 Difference]: Finished difference Result 111 states and 130 transitions. [2020-12-22 05:37:09,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-12-22 05:37:09,014 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 101 [2020-12-22 05:37:09,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:37:09,015 INFO L225 Difference]: With dead ends: 111 [2020-12-22 05:37:09,015 INFO L226 Difference]: Without dead ends: 107 [2020-12-22 05:37:09,017 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=590, Invalid=970, Unknown=0, NotChecked=0, Total=1560 [2020-12-22 05:37:09,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-12-22 05:37:09,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2020-12-22 05:37:09,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-12-22 05:37:09,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 126 transitions. [2020-12-22 05:37:09,026 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 126 transitions. Word has length 101 [2020-12-22 05:37:09,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:37:09,026 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 126 transitions. [2020-12-22 05:37:09,026 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-22 05:37:09,026 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 126 transitions. [2020-12-22 05:37:09,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-12-22 05:37:09,027 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:37:09,027 INFO L422 BasicCegarLoop]: trace histogram [20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:37:09,241 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-22 05:37:09,242 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:37:09,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:37:09,243 INFO L82 PathProgramCache]: Analyzing trace with hash 491484569, now seen corresponding path program 19 times [2020-12-22 05:37:09,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:37:09,243 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735894844] [2020-12-22 05:37:09,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:37:09,259 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:37:09,259 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1324665766] [2020-12-22 05:37:09,259 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:37:09,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:37:09,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 41 conjunts are in the unsatisfiable core [2020-12-22 05:37:09,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:37:09,814 INFO L134 CoverageAnalysis]: Checked inductivity of 893 backedges. 0 proven. 893 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:37:09,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735894844] [2020-12-22 05:37:09,815 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:37:09,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324665766] [2020-12-22 05:37:09,815 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:37:09,815 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-12-22 05:37:09,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698071684] [2020-12-22 05:37:09,816 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-22 05:37:09,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:37:09,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-22 05:37:09,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-12-22 05:37:09,817 INFO L87 Difference]: Start difference. First operand 107 states and 126 transitions. Second operand 23 states. [2020-12-22 05:37:10,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:37:10,252 INFO L93 Difference]: Finished difference Result 116 states and 136 transitions. [2020-12-22 05:37:10,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-12-22 05:37:10,252 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 106 [2020-12-22 05:37:10,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:37:10,254 INFO L225 Difference]: With dead ends: 116 [2020-12-22 05:37:10,254 INFO L226 Difference]: Without dead ends: 112 [2020-12-22 05:37:10,255 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=651, Invalid=1071, Unknown=0, NotChecked=0, Total=1722 [2020-12-22 05:37:10,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-12-22 05:37:10,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2020-12-22 05:37:10,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-12-22 05:37:10,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 132 transitions. [2020-12-22 05:37:10,265 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 132 transitions. Word has length 106 [2020-12-22 05:37:10,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:37:10,265 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 132 transitions. [2020-12-22 05:37:10,265 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-22 05:37:10,266 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 132 transitions. [2020-12-22 05:37:10,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-12-22 05:37:10,267 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:37:10,267 INFO L422 BasicCegarLoop]: trace histogram [21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:37:10,480 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:37:10,481 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:37:10,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:37:10,482 INFO L82 PathProgramCache]: Analyzing trace with hash -1521977301, now seen corresponding path program 20 times [2020-12-22 05:37:10,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:37:10,482 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057337097] [2020-12-22 05:37:10,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:37:10,492 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:37:10,493 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1368142356] [2020-12-22 05:37:10,493 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:37:10,618 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 05:37:10,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 05:37:10,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 449 conjuncts, 43 conjunts are in the unsatisfiable core [2020-12-22 05:37:10,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:37:11,060 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:37:11,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057337097] [2020-12-22 05:37:11,061 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:37:11,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368142356] [2020-12-22 05:37:11,061 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:37:11,061 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-12-22 05:37:11,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455717650] [2020-12-22 05:37:11,061 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-22 05:37:11,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:37:11,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-22 05:37:11,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-12-22 05:37:11,062 INFO L87 Difference]: Start difference. First operand 112 states and 132 transitions. Second operand 24 states. [2020-12-22 05:37:11,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:37:11,540 INFO L93 Difference]: Finished difference Result 121 states and 142 transitions. [2020-12-22 05:37:11,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-12-22 05:37:11,541 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 111 [2020-12-22 05:37:11,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:37:11,542 INFO L225 Difference]: With dead ends: 121 [2020-12-22 05:37:11,542 INFO L226 Difference]: Without dead ends: 117 [2020-12-22 05:37:11,544 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=715, Invalid=1177, Unknown=0, NotChecked=0, Total=1892 [2020-12-22 05:37:11,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-12-22 05:37:11,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2020-12-22 05:37:11,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-12-22 05:37:11,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 138 transitions. [2020-12-22 05:37:11,553 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 138 transitions. Word has length 111 [2020-12-22 05:37:11,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:37:11,553 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 138 transitions. [2020-12-22 05:37:11,553 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-22 05:37:11,554 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 138 transitions. [2020-12-22 05:37:11,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-12-22 05:37:11,555 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:37:11,555 INFO L422 BasicCegarLoop]: trace histogram [22, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:37:11,769 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-12-22 05:37:11,770 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:37:11,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:37:11,770 INFO L82 PathProgramCache]: Analyzing trace with hash -163561255, now seen corresponding path program 21 times [2020-12-22 05:37:11,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:37:11,771 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426580397] [2020-12-22 05:37:11,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:37:11,787 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:37:11,787 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2119255892] [2020-12-22 05:37:11,788 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:37:11,956 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2020-12-22 05:37:11,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 05:37:11,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 468 conjuncts, 45 conjunts are in the unsatisfiable core [2020-12-22 05:37:11,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:37:12,416 INFO L134 CoverageAnalysis]: Checked inductivity of 1092 backedges. 0 proven. 1092 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:37:12,416 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426580397] [2020-12-22 05:37:12,416 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:37:12,416 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119255892] [2020-12-22 05:37:12,416 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:37:12,416 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-12-22 05:37:12,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597421737] [2020-12-22 05:37:12,417 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-12-22 05:37:12,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:37:12,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-12-22 05:37:12,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-12-22 05:37:12,419 INFO L87 Difference]: Start difference. First operand 117 states and 138 transitions. Second operand 25 states. [2020-12-22 05:37:12,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:37:12,940 INFO L93 Difference]: Finished difference Result 126 states and 148 transitions. [2020-12-22 05:37:12,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-12-22 05:37:12,940 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 116 [2020-12-22 05:37:12,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:37:12,941 INFO L225 Difference]: With dead ends: 126 [2020-12-22 05:37:12,941 INFO L226 Difference]: Without dead ends: 122 [2020-12-22 05:37:12,942 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=782, Invalid=1288, Unknown=0, NotChecked=0, Total=2070 [2020-12-22 05:37:12,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-12-22 05:37:12,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 122. [2020-12-22 05:37:12,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-12-22 05:37:12,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 144 transitions. [2020-12-22 05:37:12,950 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 144 transitions. Word has length 116 [2020-12-22 05:37:12,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:37:12,950 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 144 transitions. [2020-12-22 05:37:12,950 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-12-22 05:37:12,950 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 144 transitions. [2020-12-22 05:37:12,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-12-22 05:37:12,951 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:37:12,951 INFO L422 BasicCegarLoop]: trace histogram [23, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:37:13,166 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:37:13,166 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:37:13,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:37:13,167 INFO L82 PathProgramCache]: Analyzing trace with hash 433108203, now seen corresponding path program 22 times [2020-12-22 05:37:13,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:37:13,168 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496782498] [2020-12-22 05:37:13,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:37:13,183 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:37:13,183 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [437975637] [2020-12-22 05:37:13,183 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:37:13,313 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 05:37:13,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 05:37:13,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 487 conjuncts, 47 conjunts are in the unsatisfiable core [2020-12-22 05:37:13,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:37:13,832 INFO L134 CoverageAnalysis]: Checked inductivity of 1199 backedges. 0 proven. 1199 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:37:13,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496782498] [2020-12-22 05:37:13,833 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:37:13,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437975637] [2020-12-22 05:37:13,833 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:37:13,833 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-12-22 05:37:13,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620937959] [2020-12-22 05:37:13,834 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-22 05:37:13,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:37:13,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-22 05:37:13,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-12-22 05:37:13,835 INFO L87 Difference]: Start difference. First operand 122 states and 144 transitions. Second operand 26 states. [2020-12-22 05:37:14,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:37:14,333 INFO L93 Difference]: Finished difference Result 131 states and 154 transitions. [2020-12-22 05:37:14,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-12-22 05:37:14,333 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 121 [2020-12-22 05:37:14,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:37:14,335 INFO L225 Difference]: With dead ends: 131 [2020-12-22 05:37:14,335 INFO L226 Difference]: Without dead ends: 127 [2020-12-22 05:37:14,336 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=852, Invalid=1404, Unknown=0, NotChecked=0, Total=2256 [2020-12-22 05:37:14,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-12-22 05:37:14,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2020-12-22 05:37:14,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-12-22 05:37:14,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 150 transitions. [2020-12-22 05:37:14,345 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 150 transitions. Word has length 121 [2020-12-22 05:37:14,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:37:14,346 INFO L481 AbstractCegarLoop]: Abstraction has 127 states and 150 transitions. [2020-12-22 05:37:14,346 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-22 05:37:14,346 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 150 transitions. [2020-12-22 05:37:14,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-12-22 05:37:14,347 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:37:14,347 INFO L422 BasicCegarLoop]: trace histogram [24, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:37:14,561 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-12-22 05:37:14,561 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:37:14,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:37:14,562 INFO L82 PathProgramCache]: Analyzing trace with hash -1054868455, now seen corresponding path program 23 times [2020-12-22 05:37:14,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:37:14,563 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56750762] [2020-12-22 05:37:14,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:37:14,574 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:37:14,574 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [568609803] [2020-12-22 05:37:14,574 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:37:14,744 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2020-12-22 05:37:14,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 05:37:14,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 506 conjuncts, 49 conjunts are in the unsatisfiable core [2020-12-22 05:37:14,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:37:15,249 INFO L134 CoverageAnalysis]: Checked inductivity of 1311 backedges. 0 proven. 1311 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:37:15,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56750762] [2020-12-22 05:37:15,250 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:37:15,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568609803] [2020-12-22 05:37:15,250 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:37:15,250 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-12-22 05:37:15,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738641537] [2020-12-22 05:37:15,251 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-12-22 05:37:15,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:37:15,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-12-22 05:37:15,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-12-22 05:37:15,252 INFO L87 Difference]: Start difference. First operand 127 states and 150 transitions. Second operand 27 states. [2020-12-22 05:37:15,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:37:15,810 INFO L93 Difference]: Finished difference Result 136 states and 160 transitions. [2020-12-22 05:37:15,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-12-22 05:37:15,811 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 126 [2020-12-22 05:37:15,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:37:15,812 INFO L225 Difference]: With dead ends: 136 [2020-12-22 05:37:15,812 INFO L226 Difference]: Without dead ends: 132 [2020-12-22 05:37:15,813 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=925, Invalid=1525, Unknown=0, NotChecked=0, Total=2450 [2020-12-22 05:37:15,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-12-22 05:37:15,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2020-12-22 05:37:15,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-12-22 05:37:15,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 156 transitions. [2020-12-22 05:37:15,823 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 156 transitions. Word has length 126 [2020-12-22 05:37:15,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:37:15,823 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 156 transitions. [2020-12-22 05:37:15,823 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-12-22 05:37:15,823 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 156 transitions. [2020-12-22 05:37:15,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-12-22 05:37:15,824 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:37:15,824 INFO L422 BasicCegarLoop]: trace histogram [25, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:37:16,037 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-12-22 05:37:16,038 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:37:16,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:37:16,039 INFO L82 PathProgramCache]: Analyzing trace with hash -909901397, now seen corresponding path program 24 times [2020-12-22 05:37:16,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:37:16,039 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414371956] [2020-12-22 05:37:16,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:37:16,048 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:37:16,048 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1853628675] [2020-12-22 05:37:16,048 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:37:16,241 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2020-12-22 05:37:16,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 05:37:16,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 525 conjuncts, 51 conjunts are in the unsatisfiable core [2020-12-22 05:37:16,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:37:16,809 INFO L134 CoverageAnalysis]: Checked inductivity of 1428 backedges. 0 proven. 1428 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:37:16,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414371956] [2020-12-22 05:37:16,809 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:37:16,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853628675] [2020-12-22 05:37:16,809 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:37:16,809 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-12-22 05:37:16,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206250861] [2020-12-22 05:37:16,810 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-22 05:37:16,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:37:16,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-22 05:37:16,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-12-22 05:37:16,811 INFO L87 Difference]: Start difference. First operand 132 states and 156 transitions. Second operand 28 states. [2020-12-22 05:37:17,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:37:17,410 INFO L93 Difference]: Finished difference Result 141 states and 166 transitions. [2020-12-22 05:37:17,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-12-22 05:37:17,411 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 131 [2020-12-22 05:37:17,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:37:17,413 INFO L225 Difference]: With dead ends: 141 [2020-12-22 05:37:17,414 INFO L226 Difference]: Without dead ends: 137 [2020-12-22 05:37:17,415 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1001, Invalid=1651, Unknown=0, NotChecked=0, Total=2652 [2020-12-22 05:37:17,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-12-22 05:37:17,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2020-12-22 05:37:17,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-12-22 05:37:17,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 162 transitions. [2020-12-22 05:37:17,424 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 162 transitions. Word has length 131 [2020-12-22 05:37:17,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:37:17,425 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 162 transitions. [2020-12-22 05:37:17,425 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-12-22 05:37:17,425 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 162 transitions. [2020-12-22 05:37:17,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-12-22 05:37:17,426 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:37:17,426 INFO L422 BasicCegarLoop]: trace histogram [26, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:37:17,639 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-22 05:37:17,640 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:37:17,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:37:17,640 INFO L82 PathProgramCache]: Analyzing trace with hash 150906713, now seen corresponding path program 25 times [2020-12-22 05:37:17,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:37:17,641 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118661852] [2020-12-22 05:37:17,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:37:17,649 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:37:17,649 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1415019364] [2020-12-22 05:37:17,649 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:37:17,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:37:17,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 544 conjuncts, 53 conjunts are in the unsatisfiable core [2020-12-22 05:37:17,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:37:18,411 INFO L134 CoverageAnalysis]: Checked inductivity of 1550 backedges. 0 proven. 1550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:37:18,412 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118661852] [2020-12-22 05:37:18,412 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:37:18,412 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415019364] [2020-12-22 05:37:18,412 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:37:18,412 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-12-22 05:37:18,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999919412] [2020-12-22 05:37:18,413 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-12-22 05:37:18,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:37:18,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-12-22 05:37:18,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-12-22 05:37:18,413 INFO L87 Difference]: Start difference. First operand 137 states and 162 transitions. Second operand 29 states. [2020-12-22 05:37:19,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:37:19,089 INFO L93 Difference]: Finished difference Result 146 states and 172 transitions. [2020-12-22 05:37:19,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-12-22 05:37:19,090 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 136 [2020-12-22 05:37:19,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:37:19,092 INFO L225 Difference]: With dead ends: 146 [2020-12-22 05:37:19,092 INFO L226 Difference]: Without dead ends: 142 [2020-12-22 05:37:19,094 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1080, Invalid=1782, Unknown=0, NotChecked=0, Total=2862 [2020-12-22 05:37:19,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-12-22 05:37:19,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2020-12-22 05:37:19,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-12-22 05:37:19,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 168 transitions. [2020-12-22 05:37:19,104 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 168 transitions. Word has length 136 [2020-12-22 05:37:19,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:37:19,104 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 168 transitions. [2020-12-22 05:37:19,105 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-12-22 05:37:19,105 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 168 transitions. [2020-12-22 05:37:19,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-12-22 05:37:19,105 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:37:19,106 INFO L422 BasicCegarLoop]: trace histogram [27, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:37:19,318 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-22 05:37:19,319 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:37:19,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:37:19,320 INFO L82 PathProgramCache]: Analyzing trace with hash -158441877, now seen corresponding path program 26 times [2020-12-22 05:37:19,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:37:19,320 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024978771] [2020-12-22 05:37:19,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:37:19,328 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:37:19,329 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [388055773] [2020-12-22 05:37:19,329 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:37:19,474 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 05:37:19,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 05:37:19,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 563 conjuncts, 55 conjunts are in the unsatisfiable core [2020-12-22 05:37:19,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:37:20,086 INFO L134 CoverageAnalysis]: Checked inductivity of 1677 backedges. 0 proven. 1677 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:37:20,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024978771] [2020-12-22 05:37:20,086 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:37:20,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388055773] [2020-12-22 05:37:20,086 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:37:20,087 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-12-22 05:37:20,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123615093] [2020-12-22 05:37:20,087 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-12-22 05:37:20,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:37:20,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-12-22 05:37:20,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-12-22 05:37:20,088 INFO L87 Difference]: Start difference. First operand 142 states and 168 transitions. Second operand 30 states. [2020-12-22 05:37:20,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:37:20,802 INFO L93 Difference]: Finished difference Result 151 states and 178 transitions. [2020-12-22 05:37:20,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-12-22 05:37:20,802 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 141 [2020-12-22 05:37:20,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:37:20,804 INFO L225 Difference]: With dead ends: 151 [2020-12-22 05:37:20,804 INFO L226 Difference]: Without dead ends: 147 [2020-12-22 05:37:20,806 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1162, Invalid=1918, Unknown=0, NotChecked=0, Total=3080 [2020-12-22 05:37:20,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-12-22 05:37:20,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2020-12-22 05:37:20,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-12-22 05:37:20,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 174 transitions. [2020-12-22 05:37:20,816 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 174 transitions. Word has length 141 [2020-12-22 05:37:20,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:37:20,816 INFO L481 AbstractCegarLoop]: Abstraction has 147 states and 174 transitions. [2020-12-22 05:37:20,816 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-12-22 05:37:20,817 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 174 transitions. [2020-12-22 05:37:20,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-12-22 05:37:20,817 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:37:20,817 INFO L422 BasicCegarLoop]: trace histogram [28, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:37:21,030 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:37:21,031 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:37:21,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:37:21,032 INFO L82 PathProgramCache]: Analyzing trace with hash -1880079719, now seen corresponding path program 27 times [2020-12-22 05:37:21,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:37:21,032 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289716189] [2020-12-22 05:37:21,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:37:21,040 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:37:21,040 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [366088489] [2020-12-22 05:37:21,040 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:37:21,309 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2020-12-22 05:37:21,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 05:37:21,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 582 conjuncts, 57 conjunts are in the unsatisfiable core [2020-12-22 05:37:21,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:37:22,076 INFO L134 CoverageAnalysis]: Checked inductivity of 1809 backedges. 0 proven. 1809 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:37:22,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289716189] [2020-12-22 05:37:22,077 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:37:22,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366088489] [2020-12-22 05:37:22,077 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:37:22,077 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-12-22 05:37:22,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107029985] [2020-12-22 05:37:22,077 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-12-22 05:37:22,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:37:22,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-12-22 05:37:22,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-12-22 05:37:22,078 INFO L87 Difference]: Start difference. First operand 147 states and 174 transitions. Second operand 31 states. [2020-12-22 05:37:22,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:37:22,860 INFO L93 Difference]: Finished difference Result 156 states and 184 transitions. [2020-12-22 05:37:22,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-12-22 05:37:22,861 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 146 [2020-12-22 05:37:22,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:37:22,862 INFO L225 Difference]: With dead ends: 156 [2020-12-22 05:37:22,862 INFO L226 Difference]: Without dead ends: 152 [2020-12-22 05:37:22,864 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1247, Invalid=2059, Unknown=0, NotChecked=0, Total=3306 [2020-12-22 05:37:22,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-12-22 05:37:22,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2020-12-22 05:37:22,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-12-22 05:37:22,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 180 transitions. [2020-12-22 05:37:22,873 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 180 transitions. Word has length 146 [2020-12-22 05:37:22,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:37:22,874 INFO L481 AbstractCegarLoop]: Abstraction has 152 states and 180 transitions. [2020-12-22 05:37:22,874 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-12-22 05:37:22,874 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 180 transitions. [2020-12-22 05:37:22,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-12-22 05:37:22,875 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:37:22,875 INFO L422 BasicCegarLoop]: trace histogram [29, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:37:23,087 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:37:23,088 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:37:23,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:37:23,088 INFO L82 PathProgramCache]: Analyzing trace with hash 177982251, now seen corresponding path program 28 times [2020-12-22 05:37:23,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:37:23,089 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45317251] [2020-12-22 05:37:23,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:37:23,097 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:37:23,097 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1541820223] [2020-12-22 05:37:23,098 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:37:23,247 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 05:37:23,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 05:37:23,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 601 conjuncts, 59 conjunts are in the unsatisfiable core [2020-12-22 05:37:23,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:37:24,017 INFO L134 CoverageAnalysis]: Checked inductivity of 1946 backedges. 0 proven. 1946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:37:24,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45317251] [2020-12-22 05:37:24,017 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:37:24,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541820223] [2020-12-22 05:37:24,017 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:37:24,017 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-12-22 05:37:24,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108951035] [2020-12-22 05:37:24,018 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-12-22 05:37:24,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:37:24,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-12-22 05:37:24,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-12-22 05:37:24,019 INFO L87 Difference]: Start difference. First operand 152 states and 180 transitions. Second operand 32 states. [2020-12-22 05:37:24,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:37:24,762 INFO L93 Difference]: Finished difference Result 161 states and 190 transitions. [2020-12-22 05:37:24,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-12-22 05:37:24,763 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 151 [2020-12-22 05:37:24,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:37:24,764 INFO L225 Difference]: With dead ends: 161 [2020-12-22 05:37:24,764 INFO L226 Difference]: Without dead ends: 157 [2020-12-22 05:37:24,766 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1335, Invalid=2205, Unknown=0, NotChecked=0, Total=3540 [2020-12-22 05:37:24,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-12-22 05:37:24,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2020-12-22 05:37:24,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-12-22 05:37:24,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 186 transitions. [2020-12-22 05:37:24,778 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 186 transitions. Word has length 151 [2020-12-22 05:37:24,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:37:24,779 INFO L481 AbstractCegarLoop]: Abstraction has 157 states and 186 transitions. [2020-12-22 05:37:24,779 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-12-22 05:37:24,779 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 186 transitions. [2020-12-22 05:37:24,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2020-12-22 05:37:24,780 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:37:24,781 INFO L422 BasicCegarLoop]: trace histogram [30, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:37:24,995 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:37:24,996 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:37:24,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:37:24,997 INFO L82 PathProgramCache]: Analyzing trace with hash -1895248423, now seen corresponding path program 29 times [2020-12-22 05:37:24,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:37:24,998 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502502915] [2020-12-22 05:37:24,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:37:25,007 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:37:25,008 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [896750919] [2020-12-22 05:37:25,008 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:37:25,198 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2020-12-22 05:37:25,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 05:37:25,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 620 conjuncts, 61 conjunts are in the unsatisfiable core [2020-12-22 05:37:25,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:37:26,070 INFO L134 CoverageAnalysis]: Checked inductivity of 2088 backedges. 0 proven. 2088 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:37:26,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502502915] [2020-12-22 05:37:26,071 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:37:26,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [896750919] [2020-12-22 05:37:26,071 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:37:26,071 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-12-22 05:37:26,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918361508] [2020-12-22 05:37:26,072 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-12-22 05:37:26,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:37:26,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-12-22 05:37:26,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-12-22 05:37:26,073 INFO L87 Difference]: Start difference. First operand 157 states and 186 transitions. Second operand 33 states. [2020-12-22 05:37:26,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:37:26,956 INFO L93 Difference]: Finished difference Result 166 states and 196 transitions. [2020-12-22 05:37:26,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2020-12-22 05:37:26,956 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 156 [2020-12-22 05:37:26,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:37:26,958 INFO L225 Difference]: With dead ends: 166 [2020-12-22 05:37:26,958 INFO L226 Difference]: Without dead ends: 162 [2020-12-22 05:37:26,962 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1426, Invalid=2356, Unknown=0, NotChecked=0, Total=3782 [2020-12-22 05:37:26,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-12-22 05:37:26,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 162. [2020-12-22 05:37:26,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-12-22 05:37:26,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 192 transitions. [2020-12-22 05:37:26,973 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 192 transitions. Word has length 156 [2020-12-22 05:37:26,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:37:26,974 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 192 transitions. [2020-12-22 05:37:26,974 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-12-22 05:37:26,974 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 192 transitions. [2020-12-22 05:37:26,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2020-12-22 05:37:26,975 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:37:26,975 INFO L422 BasicCegarLoop]: trace histogram [31, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:37:27,188 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-12-22 05:37:27,188 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:37:27,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:37:27,189 INFO L82 PathProgramCache]: Analyzing trace with hash 1498957803, now seen corresponding path program 30 times [2020-12-22 05:37:27,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:37:27,190 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341462745] [2020-12-22 05:37:27,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:37:27,197 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:37:27,198 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1958177039] [2020-12-22 05:37:27,198 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:37:27,449 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2020-12-22 05:37:27,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 05:37:27,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 639 conjuncts, 63 conjunts are in the unsatisfiable core [2020-12-22 05:37:27,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:37:28,323 INFO L134 CoverageAnalysis]: Checked inductivity of 2235 backedges. 0 proven. 2235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:37:28,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341462745] [2020-12-22 05:37:28,323 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:37:28,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958177039] [2020-12-22 05:37:28,324 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:37:28,324 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-12-22 05:37:28,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716231106] [2020-12-22 05:37:28,324 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-12-22 05:37:28,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:37:28,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-12-22 05:37:28,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-12-22 05:37:28,326 INFO L87 Difference]: Start difference. First operand 162 states and 192 transitions. Second operand 34 states. [2020-12-22 05:37:29,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:37:29,286 INFO L93 Difference]: Finished difference Result 171 states and 202 transitions. [2020-12-22 05:37:29,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2020-12-22 05:37:29,287 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 161 [2020-12-22 05:37:29,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:37:29,289 INFO L225 Difference]: With dead ends: 171 [2020-12-22 05:37:29,289 INFO L226 Difference]: Without dead ends: 167 [2020-12-22 05:37:29,291 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1520, Invalid=2512, Unknown=0, NotChecked=0, Total=4032 [2020-12-22 05:37:29,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-12-22 05:37:29,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 167. [2020-12-22 05:37:29,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-12-22 05:37:29,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 198 transitions. [2020-12-22 05:37:29,302 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 198 transitions. Word has length 161 [2020-12-22 05:37:29,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:37:29,303 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 198 transitions. [2020-12-22 05:37:29,303 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-12-22 05:37:29,303 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 198 transitions. [2020-12-22 05:37:29,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2020-12-22 05:37:29,304 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:37:29,304 INFO L422 BasicCegarLoop]: trace histogram [32, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:37:29,517 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:37:29,518 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:37:29,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:37:29,518 INFO L82 PathProgramCache]: Analyzing trace with hash -161724135, now seen corresponding path program 31 times [2020-12-22 05:37:29,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:37:29,518 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894173844] [2020-12-22 05:37:29,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:37:29,528 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:37:29,528 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1345991332] [2020-12-22 05:37:29,528 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:37:29,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:37:29,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 658 conjuncts, 65 conjunts are in the unsatisfiable core [2020-12-22 05:37:29,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:37:30,610 INFO L134 CoverageAnalysis]: Checked inductivity of 2387 backedges. 0 proven. 2387 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:37:30,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894173844] [2020-12-22 05:37:30,610 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:37:30,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345991332] [2020-12-22 05:37:30,610 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:37:30,611 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-12-22 05:37:30,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953340280] [2020-12-22 05:37:30,611 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-12-22 05:37:30,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:37:30,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-12-22 05:37:30,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-12-22 05:37:30,612 INFO L87 Difference]: Start difference. First operand 167 states and 198 transitions. Second operand 35 states. [2020-12-22 05:37:31,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:37:31,638 INFO L93 Difference]: Finished difference Result 176 states and 208 transitions. [2020-12-22 05:37:31,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2020-12-22 05:37:31,638 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 166 [2020-12-22 05:37:31,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:37:31,641 INFO L225 Difference]: With dead ends: 176 [2020-12-22 05:37:31,641 INFO L226 Difference]: Without dead ends: 172 [2020-12-22 05:37:31,643 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 496 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1617, Invalid=2673, Unknown=0, NotChecked=0, Total=4290 [2020-12-22 05:37:31,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-12-22 05:37:31,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 172. [2020-12-22 05:37:31,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-12-22 05:37:31,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 204 transitions. [2020-12-22 05:37:31,654 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 204 transitions. Word has length 166 [2020-12-22 05:37:31,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:37:31,655 INFO L481 AbstractCegarLoop]: Abstraction has 172 states and 204 transitions. [2020-12-22 05:37:31,655 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-12-22 05:37:31,655 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 204 transitions. [2020-12-22 05:37:31,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2020-12-22 05:37:31,656 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:37:31,656 INFO L422 BasicCegarLoop]: trace histogram [33, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:37:31,871 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-12-22 05:37:31,871 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:37:31,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:37:31,872 INFO L82 PathProgramCache]: Analyzing trace with hash -550513493, now seen corresponding path program 32 times [2020-12-22 05:37:31,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:37:31,872 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125658403] [2020-12-22 05:37:31,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:37:31,881 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:37:31,882 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1444497492] [2020-12-22 05:37:31,882 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:37:32,034 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 05:37:32,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 05:37:32,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 677 conjuncts, 67 conjunts are in the unsatisfiable core [2020-12-22 05:37:32,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:37:32,933 INFO L134 CoverageAnalysis]: Checked inductivity of 2544 backedges. 0 proven. 2544 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:37:32,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125658403] [2020-12-22 05:37:32,933 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:37:32,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444497492] [2020-12-22 05:37:32,934 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:37:32,934 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-12-22 05:37:32,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965956958] [2020-12-22 05:37:32,934 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-12-22 05:37:32,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:37:32,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-12-22 05:37:32,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-12-22 05:37:32,937 INFO L87 Difference]: Start difference. First operand 172 states and 204 transitions. Second operand 36 states. [2020-12-22 05:37:33,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:37:33,980 INFO L93 Difference]: Finished difference Result 181 states and 214 transitions. [2020-12-22 05:37:33,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2020-12-22 05:37:33,980 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 171 [2020-12-22 05:37:33,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:37:33,982 INFO L225 Difference]: With dead ends: 181 [2020-12-22 05:37:33,982 INFO L226 Difference]: Without dead ends: 177 [2020-12-22 05:37:33,983 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1717, Invalid=2839, Unknown=0, NotChecked=0, Total=4556 [2020-12-22 05:37:33,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-12-22 05:37:33,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 177. [2020-12-22 05:37:33,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-12-22 05:37:33,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 210 transitions. [2020-12-22 05:37:33,995 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 210 transitions. Word has length 171 [2020-12-22 05:37:33,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:37:33,996 INFO L481 AbstractCegarLoop]: Abstraction has 177 states and 210 transitions. [2020-12-22 05:37:33,996 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-12-22 05:37:33,996 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 210 transitions. [2020-12-22 05:37:33,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2020-12-22 05:37:33,997 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:37:33,997 INFO L422 BasicCegarLoop]: trace histogram [34, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:37:34,211 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:37:34,212 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:37:34,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:37:34,212 INFO L82 PathProgramCache]: Analyzing trace with hash -1392593831, now seen corresponding path program 33 times [2020-12-22 05:37:34,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:37:34,213 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302722273] [2020-12-22 05:37:34,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:37:34,221 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:37:34,222 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [173006785] [2020-12-22 05:37:34,222 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:37:34,561 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2020-12-22 05:37:34,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 05:37:34,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 696 conjuncts, 69 conjunts are in the unsatisfiable core [2020-12-22 05:37:34,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:37:35,511 INFO L134 CoverageAnalysis]: Checked inductivity of 2706 backedges. 0 proven. 2706 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:37:35,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302722273] [2020-12-22 05:37:35,512 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:37:35,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173006785] [2020-12-22 05:37:35,512 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:37:35,512 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-12-22 05:37:35,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211203656] [2020-12-22 05:37:35,516 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-12-22 05:37:35,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:37:35,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-12-22 05:37:35,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-12-22 05:37:35,518 INFO L87 Difference]: Start difference. First operand 177 states and 210 transitions. Second operand 37 states. [2020-12-22 05:37:36,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:37:36,548 INFO L93 Difference]: Finished difference Result 186 states and 220 transitions. [2020-12-22 05:37:36,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2020-12-22 05:37:36,554 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 176 [2020-12-22 05:37:36,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:37:36,555 INFO L225 Difference]: With dead ends: 186 [2020-12-22 05:37:36,555 INFO L226 Difference]: Without dead ends: 182 [2020-12-22 05:37:36,556 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 561 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1820, Invalid=3010, Unknown=0, NotChecked=0, Total=4830 [2020-12-22 05:37:36,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-12-22 05:37:36,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 182. [2020-12-22 05:37:36,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2020-12-22 05:37:36,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 216 transitions. [2020-12-22 05:37:36,566 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 216 transitions. Word has length 176 [2020-12-22 05:37:36,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:37:36,567 INFO L481 AbstractCegarLoop]: Abstraction has 182 states and 216 transitions. [2020-12-22 05:37:36,567 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-12-22 05:37:36,567 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 216 transitions. [2020-12-22 05:37:36,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2020-12-22 05:37:36,568 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:37:36,569 INFO L422 BasicCegarLoop]: trace histogram [35, 34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:37:36,781 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-12-22 05:37:36,782 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:37:36,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:37:36,782 INFO L82 PathProgramCache]: Analyzing trace with hash 26112363, now seen corresponding path program 34 times [2020-12-22 05:37:36,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:37:36,783 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65471559] [2020-12-22 05:37:36,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:37:36,792 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:37:36,793 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1619109646] [2020-12-22 05:37:36,793 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 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:37:36,968 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 05:37:36,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 05:37:36,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 715 conjuncts, 71 conjunts are in the unsatisfiable core [2020-12-22 05:37:36,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:37:38,009 INFO L134 CoverageAnalysis]: Checked inductivity of 2873 backedges. 0 proven. 2873 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:37:38,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65471559] [2020-12-22 05:37:38,010 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:37:38,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619109646] [2020-12-22 05:37:38,010 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:37:38,010 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-12-22 05:37:38,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642154193] [2020-12-22 05:37:38,011 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-12-22 05:37:38,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:37:38,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-12-22 05:37:38,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-12-22 05:37:38,012 INFO L87 Difference]: Start difference. First operand 182 states and 216 transitions. Second operand 38 states. [2020-12-22 05:37:39,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:37:39,164 INFO L93 Difference]: Finished difference Result 191 states and 226 transitions. [2020-12-22 05:37:39,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2020-12-22 05:37:39,164 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 181 [2020-12-22 05:37:39,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:37:39,166 INFO L225 Difference]: With dead ends: 191 [2020-12-22 05:37:39,166 INFO L226 Difference]: Without dead ends: 187 [2020-12-22 05:37:39,168 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 595 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1926, Invalid=3186, Unknown=0, NotChecked=0, Total=5112 [2020-12-22 05:37:39,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-12-22 05:37:39,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 187. [2020-12-22 05:37:39,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2020-12-22 05:37:39,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 222 transitions. [2020-12-22 05:37:39,179 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 222 transitions. Word has length 181 [2020-12-22 05:37:39,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:37:39,180 INFO L481 AbstractCegarLoop]: Abstraction has 187 states and 222 transitions. [2020-12-22 05:37:39,180 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-12-22 05:37:39,180 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 222 transitions. [2020-12-22 05:37:39,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2020-12-22 05:37:39,181 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:37:39,181 INFO L422 BasicCegarLoop]: trace histogram [36, 35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:37:39,395 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-12-22 05:37:39,396 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:37:39,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:37:39,396 INFO L82 PathProgramCache]: Analyzing trace with hash -788263015, now seen corresponding path program 35 times [2020-12-22 05:37:39,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:37:39,397 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285627528] [2020-12-22 05:37:39,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:37:39,405 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:37:39,405 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [732587332] [2020-12-22 05:37:39,405 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:37:39,618 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2020-12-22 05:37:39,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 05:37:39,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 734 conjuncts, 73 conjunts are in the unsatisfiable core [2020-12-22 05:37:39,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:37:40,782 INFO L134 CoverageAnalysis]: Checked inductivity of 3045 backedges. 0 proven. 3045 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:37:40,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285627528] [2020-12-22 05:37:40,782 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:37:40,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732587332] [2020-12-22 05:37:40,783 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:37:40,783 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-12-22 05:37:40,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427113944] [2020-12-22 05:37:40,783 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-12-22 05:37:40,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:37:40,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-12-22 05:37:40,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-12-22 05:37:40,784 INFO L87 Difference]: Start difference. First operand 187 states and 222 transitions. Second operand 39 states. [2020-12-22 05:37:42,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:37:42,032 INFO L93 Difference]: Finished difference Result 196 states and 232 transitions. [2020-12-22 05:37:42,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2020-12-22 05:37:42,032 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 186 [2020-12-22 05:37:42,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:37:42,034 INFO L225 Difference]: With dead ends: 196 [2020-12-22 05:37:42,034 INFO L226 Difference]: Without dead ends: 192 [2020-12-22 05:37:42,035 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 630 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2035, Invalid=3367, Unknown=0, NotChecked=0, Total=5402 [2020-12-22 05:37:42,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-12-22 05:37:42,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 192. [2020-12-22 05:37:42,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2020-12-22 05:37:42,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 228 transitions. [2020-12-22 05:37:42,046 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 228 transitions. Word has length 186 [2020-12-22 05:37:42,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:37:42,046 INFO L481 AbstractCegarLoop]: Abstraction has 192 states and 228 transitions. [2020-12-22 05:37:42,046 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-12-22 05:37:42,046 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 228 transitions. [2020-12-22 05:37:42,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2020-12-22 05:37:42,047 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:37:42,047 INFO L422 BasicCegarLoop]: trace histogram [37, 36, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:37:42,261 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-12-22 05:37:42,262 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:37:42,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:37:42,263 INFO L82 PathProgramCache]: Analyzing trace with hash 1323310635, now seen corresponding path program 36 times [2020-12-22 05:37:42,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:37:42,263 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217876706] [2020-12-22 05:37:42,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:37:42,271 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:37:42,272 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [121264869] [2020-12-22 05:37:42,272 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:37:42,580 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2020-12-22 05:37:42,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 05:37:42,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 753 conjuncts, 75 conjunts are in the unsatisfiable core [2020-12-22 05:37:42,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:37:43,817 INFO L134 CoverageAnalysis]: Checked inductivity of 3222 backedges. 0 proven. 3222 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:37:43,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217876706] [2020-12-22 05:37:43,818 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:37:43,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121264869] [2020-12-22 05:37:43,818 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:37:43,818 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-12-22 05:37:43,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778344858] [2020-12-22 05:37:43,818 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-12-22 05:37:43,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:37:43,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-12-22 05:37:43,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-12-22 05:37:43,819 INFO L87 Difference]: Start difference. First operand 192 states and 228 transitions. Second operand 40 states. [2020-12-22 05:37:45,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:37:45,120 INFO L93 Difference]: Finished difference Result 201 states and 238 transitions. [2020-12-22 05:37:45,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2020-12-22 05:37:45,120 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 191 [2020-12-22 05:37:45,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:37:45,122 INFO L225 Difference]: With dead ends: 201 [2020-12-22 05:37:45,122 INFO L226 Difference]: Without dead ends: 197 [2020-12-22 05:37:45,123 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 666 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2147, Invalid=3553, Unknown=0, NotChecked=0, Total=5700 [2020-12-22 05:37:45,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2020-12-22 05:37:45,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 197. [2020-12-22 05:37:45,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2020-12-22 05:37:45,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 234 transitions. [2020-12-22 05:37:45,137 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 234 transitions. Word has length 191 [2020-12-22 05:37:45,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:37:45,137 INFO L481 AbstractCegarLoop]: Abstraction has 197 states and 234 transitions. [2020-12-22 05:37:45,137 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-12-22 05:37:45,137 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 234 transitions. [2020-12-22 05:37:45,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2020-12-22 05:37:45,138 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:37:45,139 INFO L422 BasicCegarLoop]: trace histogram [38, 37, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:37:45,353 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-12-22 05:37:45,353 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:37:45,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:37:45,354 INFO L82 PathProgramCache]: Analyzing trace with hash -142583079, now seen corresponding path program 37 times [2020-12-22 05:37:45,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:37:45,355 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411517227] [2020-12-22 05:37:45,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:37:45,363 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:37:45,364 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [400918881] [2020-12-22 05:37:45,364 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:37:45,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:37:45,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 772 conjuncts, 77 conjunts are in the unsatisfiable core [2020-12-22 05:37:45,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:37:46,738 INFO L134 CoverageAnalysis]: Checked inductivity of 3404 backedges. 0 proven. 3404 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:37:46,739 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411517227] [2020-12-22 05:37:46,739 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:37:46,739 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [400918881] [2020-12-22 05:37:46,739 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:37:46,739 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-12-22 05:37:46,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835838645] [2020-12-22 05:37:46,740 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-12-22 05:37:46,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:37:46,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-12-22 05:37:46,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-12-22 05:37:46,741 INFO L87 Difference]: Start difference. First operand 197 states and 234 transitions. Second operand 41 states. [2020-12-22 05:37:48,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:37:48,052 INFO L93 Difference]: Finished difference Result 206 states and 244 transitions. [2020-12-22 05:37:48,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2020-12-22 05:37:48,052 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 196 [2020-12-22 05:37:48,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:37:48,054 INFO L225 Difference]: With dead ends: 206 [2020-12-22 05:37:48,054 INFO L226 Difference]: Without dead ends: 202 [2020-12-22 05:37:48,056 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2262, Invalid=3744, Unknown=0, NotChecked=0, Total=6006 [2020-12-22 05:37:48,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-12-22 05:37:48,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 202. [2020-12-22 05:37:48,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2020-12-22 05:37:48,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 240 transitions. [2020-12-22 05:37:48,067 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 240 transitions. Word has length 196 [2020-12-22 05:37:48,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:37:48,068 INFO L481 AbstractCegarLoop]: Abstraction has 202 states and 240 transitions. [2020-12-22 05:37:48,068 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-12-22 05:37:48,068 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 240 transitions. [2020-12-22 05:37:48,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2020-12-22 05:37:48,069 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:37:48,069 INFO L422 BasicCegarLoop]: trace histogram [39, 38, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:37:48,284 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:37:48,285 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:37:48,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:37:48,285 INFO L82 PathProgramCache]: Analyzing trace with hash 1049680619, now seen corresponding path program 38 times [2020-12-22 05:37:48,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:37:48,285 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329047563] [2020-12-22 05:37:48,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:37:48,299 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:37:48,299 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1020099433] [2020-12-22 05:37:48,299 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:37:48,476 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 05:37:48,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 05:37:48,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 791 conjuncts, 79 conjunts are in the unsatisfiable core [2020-12-22 05:37:48,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:37:49,842 INFO L134 CoverageAnalysis]: Checked inductivity of 3591 backedges. 0 proven. 3591 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:37:49,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329047563] [2020-12-22 05:37:49,842 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:37:49,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020099433] [2020-12-22 05:37:49,842 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:37:49,842 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-12-22 05:37:49,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514426177] [2020-12-22 05:37:49,843 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-12-22 05:37:49,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:37:49,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-12-22 05:37:49,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-12-22 05:37:49,844 INFO L87 Difference]: Start difference. First operand 202 states and 240 transitions. Second operand 42 states. [2020-12-22 05:37:51,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:37:51,229 INFO L93 Difference]: Finished difference Result 211 states and 250 transitions. [2020-12-22 05:37:51,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2020-12-22 05:37:51,229 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 201 [2020-12-22 05:37:51,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:37:51,232 INFO L225 Difference]: With dead ends: 211 [2020-12-22 05:37:51,232 INFO L226 Difference]: Without dead ends: 207 [2020-12-22 05:37:51,233 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 741 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2380, Invalid=3940, Unknown=0, NotChecked=0, Total=6320 [2020-12-22 05:37:51,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-12-22 05:37:51,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 207. [2020-12-22 05:37:51,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2020-12-22 05:37:51,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 246 transitions. [2020-12-22 05:37:51,245 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 246 transitions. Word has length 201 [2020-12-22 05:37:51,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:37:51,245 INFO L481 AbstractCegarLoop]: Abstraction has 207 states and 246 transitions. [2020-12-22 05:37:51,245 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-12-22 05:37:51,246 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 246 transitions. [2020-12-22 05:37:51,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2020-12-22 05:37:51,247 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:37:51,247 INFO L422 BasicCegarLoop]: trace histogram [40, 39, 39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:37:51,460 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2020-12-22 05:37:51,461 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:37:51,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:37:51,461 INFO L82 PathProgramCache]: Analyzing trace with hash 1820825113, now seen corresponding path program 39 times [2020-12-22 05:37:51,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:37:51,462 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140066556] [2020-12-22 05:37:51,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:37:51,470 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:37:51,470 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [528310660] [2020-12-22 05:37:51,471 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:37:51,812 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2020-12-22 05:37:51,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 05:37:51,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 810 conjuncts, 81 conjunts are in the unsatisfiable core [2020-12-22 05:37:51,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:37:53,253 INFO L134 CoverageAnalysis]: Checked inductivity of 3783 backedges. 0 proven. 3783 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:37:53,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140066556] [2020-12-22 05:37:53,254 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:37:53,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528310660] [2020-12-22 05:37:53,254 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:37:53,254 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-12-22 05:37:53,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20456422] [2020-12-22 05:37:53,254 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-12-22 05:37:53,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:37:53,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-12-22 05:37:53,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-12-22 05:37:53,256 INFO L87 Difference]: Start difference. First operand 207 states and 246 transitions. Second operand 43 states. [2020-12-22 05:37:54,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:37:54,699 INFO L93 Difference]: Finished difference Result 216 states and 256 transitions. [2020-12-22 05:37:54,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2020-12-22 05:37:54,700 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 206 [2020-12-22 05:37:54,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:37:54,701 INFO L225 Difference]: With dead ends: 216 [2020-12-22 05:37:54,701 INFO L226 Difference]: Without dead ends: 212 [2020-12-22 05:37:54,702 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 780 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2501, Invalid=4141, Unknown=0, NotChecked=0, Total=6642 [2020-12-22 05:37:54,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-12-22 05:37:54,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 212. [2020-12-22 05:37:54,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2020-12-22 05:37:54,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 252 transitions. [2020-12-22 05:37:54,715 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 252 transitions. Word has length 206 [2020-12-22 05:37:54,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:37:54,715 INFO L481 AbstractCegarLoop]: Abstraction has 212 states and 252 transitions. [2020-12-22 05:37:54,715 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-12-22 05:37:54,715 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 252 transitions. [2020-12-22 05:37:54,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2020-12-22 05:37:54,716 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:37:54,717 INFO L422 BasicCegarLoop]: trace histogram [41, 40, 40, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:37:54,929 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:37:54,929 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:37:54,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:37:54,930 INFO L82 PathProgramCache]: Analyzing trace with hash -250828885, now seen corresponding path program 40 times [2020-12-22 05:37:54,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:37:54,931 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941395517] [2020-12-22 05:37:54,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:37:54,939 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:37:54,940 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1328059471] [2020-12-22 05:37:54,940 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 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:37:55,141 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 05:37:55,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 05:37:55,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 829 conjuncts, 83 conjunts are in the unsatisfiable core [2020-12-22 05:37:55,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:37:56,593 INFO L134 CoverageAnalysis]: Checked inductivity of 3980 backedges. 0 proven. 3980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:37:56,593 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941395517] [2020-12-22 05:37:56,593 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:37:56,593 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328059471] [2020-12-22 05:37:56,593 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:37:56,593 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-12-22 05:37:56,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122556935] [2020-12-22 05:37:56,594 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-12-22 05:37:56,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:37:56,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-12-22 05:37:56,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-12-22 05:37:56,595 INFO L87 Difference]: Start difference. First operand 212 states and 252 transitions. Second operand 44 states. [2020-12-22 05:37:58,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:37:58,141 INFO L93 Difference]: Finished difference Result 221 states and 262 transitions. [2020-12-22 05:37:58,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2020-12-22 05:37:58,142 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 211 [2020-12-22 05:37:58,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:37:58,143 INFO L225 Difference]: With dead ends: 221 [2020-12-22 05:37:58,143 INFO L226 Difference]: Without dead ends: 217 [2020-12-22 05:37:58,145 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 820 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2625, Invalid=4347, Unknown=0, NotChecked=0, Total=6972 [2020-12-22 05:37:58,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2020-12-22 05:37:58,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 217. [2020-12-22 05:37:58,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2020-12-22 05:37:58,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 258 transitions. [2020-12-22 05:37:58,156 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 258 transitions. Word has length 211 [2020-12-22 05:37:58,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:37:58,156 INFO L481 AbstractCegarLoop]: Abstraction has 217 states and 258 transitions. [2020-12-22 05:37:58,156 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-12-22 05:37:58,156 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 258 transitions. [2020-12-22 05:37:58,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2020-12-22 05:37:58,157 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:37:58,157 INFO L422 BasicCegarLoop]: trace histogram [42, 41, 41, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:37:58,358 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:37:58,358 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:37:58,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:37:58,359 INFO L82 PathProgramCache]: Analyzing trace with hash 1932378457, now seen corresponding path program 41 times [2020-12-22 05:37:58,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:37:58,359 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93161221] [2020-12-22 05:37:58,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:37:58,367 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:37:58,367 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1486508660] [2020-12-22 05:37:58,367 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:37:58,619 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2020-12-22 05:37:58,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 05:37:58,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 848 conjuncts, 85 conjunts are in the unsatisfiable core [2020-12-22 05:37:58,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:38:00,100 INFO L134 CoverageAnalysis]: Checked inductivity of 4182 backedges. 0 proven. 4182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:38:00,100 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93161221] [2020-12-22 05:38:00,100 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:38:00,100 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486508660] [2020-12-22 05:38:00,100 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:38:00,101 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-12-22 05:38:00,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943770865] [2020-12-22 05:38:00,101 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-12-22 05:38:00,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:38:00,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-12-22 05:38:00,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2020-12-22 05:38:00,102 INFO L87 Difference]: Start difference. First operand 217 states and 258 transitions. Second operand 45 states. [2020-12-22 05:38:01,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:38:01,738 INFO L93 Difference]: Finished difference Result 226 states and 268 transitions. [2020-12-22 05:38:01,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2020-12-22 05:38:01,739 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 216 [2020-12-22 05:38:01,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:38:01,741 INFO L225 Difference]: With dead ends: 226 [2020-12-22 05:38:01,741 INFO L226 Difference]: Without dead ends: 222 [2020-12-22 05:38:01,742 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 861 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2752, Invalid=4558, Unknown=0, NotChecked=0, Total=7310 [2020-12-22 05:38:01,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-12-22 05:38:01,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 222. [2020-12-22 05:38:01,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222 states. [2020-12-22 05:38:01,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 264 transitions. [2020-12-22 05:38:01,750 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 264 transitions. Word has length 216 [2020-12-22 05:38:01,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:38:01,750 INFO L481 AbstractCegarLoop]: Abstraction has 222 states and 264 transitions. [2020-12-22 05:38:01,751 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-12-22 05:38:01,751 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 264 transitions. [2020-12-22 05:38:01,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2020-12-22 05:38:01,752 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:38:01,752 INFO L422 BasicCegarLoop]: trace histogram [43, 42, 42, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:38:01,953 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2020-12-22 05:38:01,954 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:38:01,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:38:01,954 INFO L82 PathProgramCache]: Analyzing trace with hash -272661397, now seen corresponding path program 42 times [2020-12-22 05:38:01,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:38:01,955 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140142815] [2020-12-22 05:38:01,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:38:01,962 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:38:01,962 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [304570650] [2020-12-22 05:38:01,962 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 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:38:02,343 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2020-12-22 05:38:02,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 05:38:02,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 867 conjuncts, 87 conjunts are in the unsatisfiable core [2020-12-22 05:38:02,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:38:03,966 INFO L134 CoverageAnalysis]: Checked inductivity of 4389 backedges. 0 proven. 4389 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:38:03,967 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140142815] [2020-12-22 05:38:03,967 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:38:03,967 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304570650] [2020-12-22 05:38:03,967 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:38:03,967 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-12-22 05:38:03,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314725540] [2020-12-22 05:38:03,968 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-12-22 05:38:03,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:38:03,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-12-22 05:38:03,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2020-12-22 05:38:03,969 INFO L87 Difference]: Start difference. First operand 222 states and 264 transitions. Second operand 46 states. [2020-12-22 05:38:05,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:38:05,661 INFO L93 Difference]: Finished difference Result 231 states and 274 transitions. [2020-12-22 05:38:05,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2020-12-22 05:38:05,667 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 221 [2020-12-22 05:38:05,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:38:05,668 INFO L225 Difference]: With dead ends: 231 [2020-12-22 05:38:05,668 INFO L226 Difference]: Without dead ends: 227 [2020-12-22 05:38:05,669 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 903 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=2882, Invalid=4774, Unknown=0, NotChecked=0, Total=7656 [2020-12-22 05:38:05,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-12-22 05:38:05,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 227. [2020-12-22 05:38:05,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227 states. [2020-12-22 05:38:05,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 270 transitions. [2020-12-22 05:38:05,682 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 270 transitions. Word has length 221 [2020-12-22 05:38:05,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:38:05,682 INFO L481 AbstractCegarLoop]: Abstraction has 227 states and 270 transitions. [2020-12-22 05:38:05,682 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-12-22 05:38:05,682 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 270 transitions. [2020-12-22 05:38:05,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2020-12-22 05:38:05,683 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:38:05,684 INFO L422 BasicCegarLoop]: trace histogram [44, 43, 43, 43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:38:05,897 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-12-22 05:38:05,898 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:38:05,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:38:05,899 INFO L82 PathProgramCache]: Analyzing trace with hash -2054759271, now seen corresponding path program 43 times [2020-12-22 05:38:05,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:38:05,899 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526512436] [2020-12-22 05:38:05,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:38:05,907 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:38:05,907 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1860099772] [2020-12-22 05:38:05,907 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 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:38:06,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:38:06,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 886 conjuncts, 89 conjunts are in the unsatisfiable core [2020-12-22 05:38:06,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:38:07,799 INFO L134 CoverageAnalysis]: Checked inductivity of 4601 backedges. 0 proven. 4601 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:38:07,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526512436] [2020-12-22 05:38:07,799 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:38:07,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860099772] [2020-12-22 05:38:07,800 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:38:07,800 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-12-22 05:38:07,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53770799] [2020-12-22 05:38:07,801 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-12-22 05:38:07,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:38:07,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-12-22 05:38:07,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2020-12-22 05:38:07,802 INFO L87 Difference]: Start difference. First operand 227 states and 270 transitions. Second operand 47 states. [2020-12-22 05:38:09,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:38:09,539 INFO L93 Difference]: Finished difference Result 236 states and 280 transitions. [2020-12-22 05:38:09,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2020-12-22 05:38:09,540 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 226 [2020-12-22 05:38:09,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:38:09,541 INFO L225 Difference]: With dead ends: 236 [2020-12-22 05:38:09,541 INFO L226 Difference]: Without dead ends: 232 [2020-12-22 05:38:09,542 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 946 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=3015, Invalid=4995, Unknown=0, NotChecked=0, Total=8010 [2020-12-22 05:38:09,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-12-22 05:38:09,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 232. [2020-12-22 05:38:09,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2020-12-22 05:38:09,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 276 transitions. [2020-12-22 05:38:09,555 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 276 transitions. Word has length 226 [2020-12-22 05:38:09,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:38:09,555 INFO L481 AbstractCegarLoop]: Abstraction has 232 states and 276 transitions. [2020-12-22 05:38:09,555 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-12-22 05:38:09,556 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 276 transitions. [2020-12-22 05:38:09,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2020-12-22 05:38:09,557 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:38:09,557 INFO L422 BasicCegarLoop]: trace histogram [45, 44, 44, 44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:38:09,770 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2020-12-22 05:38:09,771 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:38:09,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:38:09,771 INFO L82 PathProgramCache]: Analyzing trace with hash -317361877, now seen corresponding path program 44 times [2020-12-22 05:38:09,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:38:09,772 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405526075] [2020-12-22 05:38:09,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:38:09,781 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:38:09,781 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [107940550] [2020-12-22 05:38:09,781 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 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:38:09,993 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 05:38:09,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 05:38:09,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 905 conjuncts, 91 conjunts are in the unsatisfiable core [2020-12-22 05:38:10,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:38:11,695 INFO L134 CoverageAnalysis]: Checked inductivity of 4818 backedges. 0 proven. 4818 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:38:11,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405526075] [2020-12-22 05:38:11,696 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:38:11,696 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107940550] [2020-12-22 05:38:11,696 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:38:11,696 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-12-22 05:38:11,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214430437] [2020-12-22 05:38:11,697 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-12-22 05:38:11,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:38:11,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-12-22 05:38:11,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2020-12-22 05:38:11,698 INFO L87 Difference]: Start difference. First operand 232 states and 276 transitions. Second operand 48 states. [2020-12-22 05:38:13,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:38:13,609 INFO L93 Difference]: Finished difference Result 241 states and 286 transitions. [2020-12-22 05:38:13,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2020-12-22 05:38:13,609 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 231 [2020-12-22 05:38:13,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:38:13,614 INFO L225 Difference]: With dead ends: 241 [2020-12-22 05:38:13,614 INFO L226 Difference]: Without dead ends: 237 [2020-12-22 05:38:13,616 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 990 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=3151, Invalid=5221, Unknown=0, NotChecked=0, Total=8372 [2020-12-22 05:38:13,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2020-12-22 05:38:13,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 237. [2020-12-22 05:38:13,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 237 states. [2020-12-22 05:38:13,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 282 transitions. [2020-12-22 05:38:13,629 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 282 transitions. Word has length 231 [2020-12-22 05:38:13,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:38:13,630 INFO L481 AbstractCegarLoop]: Abstraction has 237 states and 282 transitions. [2020-12-22 05:38:13,630 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-12-22 05:38:13,630 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 282 transitions. [2020-12-22 05:38:13,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2020-12-22 05:38:13,631 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:38:13,631 INFO L422 BasicCegarLoop]: trace histogram [46, 45, 45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:38:13,844 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:38:13,845 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:38:13,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:38:13,846 INFO L82 PathProgramCache]: Analyzing trace with hash -1801000999, now seen corresponding path program 45 times [2020-12-22 05:38:13,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:38:13,846 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585823495] [2020-12-22 05:38:13,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:38:13,855 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:38:13,855 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2098371879] [2020-12-22 05:38:13,855 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:38:14,273 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 46 check-sat command(s) [2020-12-22 05:38:14,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 05:38:14,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 924 conjuncts, 93 conjunts are in the unsatisfiable core [2020-12-22 05:38:14,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:38:16,034 INFO L134 CoverageAnalysis]: Checked inductivity of 5040 backedges. 0 proven. 5040 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:38:16,035 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585823495] [2020-12-22 05:38:16,035 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:38:16,035 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098371879] [2020-12-22 05:38:16,035 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:38:16,035 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-12-22 05:38:16,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515270831] [2020-12-22 05:38:16,036 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-12-22 05:38:16,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:38:16,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-12-22 05:38:16,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2020-12-22 05:38:16,036 INFO L87 Difference]: Start difference. First operand 237 states and 282 transitions. Second operand 49 states. [2020-12-22 05:38:18,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:38:18,032 INFO L93 Difference]: Finished difference Result 246 states and 292 transitions. [2020-12-22 05:38:18,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2020-12-22 05:38:18,033 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 236 [2020-12-22 05:38:18,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:38:18,036 INFO L225 Difference]: With dead ends: 246 [2020-12-22 05:38:18,036 INFO L226 Difference]: Without dead ends: 242 [2020-12-22 05:38:18,037 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1035 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=3290, Invalid=5452, Unknown=0, NotChecked=0, Total=8742 [2020-12-22 05:38:18,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2020-12-22 05:38:18,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 242. [2020-12-22 05:38:18,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 242 states. [2020-12-22 05:38:18,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 288 transitions. [2020-12-22 05:38:18,050 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 288 transitions. Word has length 236 [2020-12-22 05:38:18,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:38:18,051 INFO L481 AbstractCegarLoop]: Abstraction has 242 states and 288 transitions. [2020-12-22 05:38:18,051 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-12-22 05:38:18,051 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 288 transitions. [2020-12-22 05:38:18,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2020-12-22 05:38:18,052 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:38:18,052 INFO L422 BasicCegarLoop]: trace histogram [47, 46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:38:18,267 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-12-22 05:38:18,268 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:38:18,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:38:18,268 INFO L82 PathProgramCache]: Analyzing trace with hash -2072351253, now seen corresponding path program 46 times [2020-12-22 05:38:18,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:38:18,269 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994081890] [2020-12-22 05:38:18,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:38:18,276 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:38:18,276 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [693062893] [2020-12-22 05:38:18,276 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 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:38:18,493 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 05:38:18,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 05:38:18,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 943 conjuncts, 95 conjunts are in the unsatisfiable core [2020-12-22 05:38:18,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:38:20,354 INFO L134 CoverageAnalysis]: Checked inductivity of 5267 backedges. 0 proven. 5267 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:38:20,355 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994081890] [2020-12-22 05:38:20,355 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:38:20,355 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693062893] [2020-12-22 05:38:20,355 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:38:20,355 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-12-22 05:38:20,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088347676] [2020-12-22 05:38:20,356 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-12-22 05:38:20,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:38:20,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-12-22 05:38:20,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2020-12-22 05:38:20,357 INFO L87 Difference]: Start difference. First operand 242 states and 288 transitions. Second operand 50 states. [2020-12-22 05:38:22,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:38:22,469 INFO L93 Difference]: Finished difference Result 251 states and 298 transitions. [2020-12-22 05:38:22,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2020-12-22 05:38:22,470 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 241 [2020-12-22 05:38:22,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:38:22,472 INFO L225 Difference]: With dead ends: 251 [2020-12-22 05:38:22,472 INFO L226 Difference]: Without dead ends: 247 [2020-12-22 05:38:22,473 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 286 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1081 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=3432, Invalid=5688, Unknown=0, NotChecked=0, Total=9120 [2020-12-22 05:38:22,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2020-12-22 05:38:22,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 247. [2020-12-22 05:38:22,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 247 states. [2020-12-22 05:38:22,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 294 transitions. [2020-12-22 05:38:22,487 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 294 transitions. Word has length 241 [2020-12-22 05:38:22,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:38:22,487 INFO L481 AbstractCegarLoop]: Abstraction has 247 states and 294 transitions. [2020-12-22 05:38:22,487 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-12-22 05:38:22,487 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 294 transitions. [2020-12-22 05:38:22,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2020-12-22 05:38:22,488 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:38:22,489 INFO L422 BasicCegarLoop]: trace histogram [48, 47, 47, 47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:38:22,702 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-12-22 05:38:22,703 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:38:22,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:38:22,703 INFO L82 PathProgramCache]: Analyzing trace with hash 1218568985, now seen corresponding path program 47 times [2020-12-22 05:38:22,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:38:22,704 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409504370] [2020-12-22 05:38:22,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:38:22,712 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:38:22,712 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [411299383] [2020-12-22 05:38:22,713 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 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:38:23,038 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 48 check-sat command(s) [2020-12-22 05:38:23,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 05:38:23,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 962 conjuncts, 97 conjunts are in the unsatisfiable core [2020-12-22 05:38:23,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:38:25,055 INFO L134 CoverageAnalysis]: Checked inductivity of 5499 backedges. 0 proven. 5499 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:38:25,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409504370] [2020-12-22 05:38:25,056 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:38:25,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411299383] [2020-12-22 05:38:25,056 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:38:25,056 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2020-12-22 05:38:25,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582579305] [2020-12-22 05:38:25,057 INFO L461 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-12-22 05:38:25,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:38:25,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-12-22 05:38:25,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2020-12-22 05:38:25,058 INFO L87 Difference]: Start difference. First operand 247 states and 294 transitions. Second operand 51 states. [2020-12-22 05:38:27,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:38:27,204 INFO L93 Difference]: Finished difference Result 256 states and 304 transitions. [2020-12-22 05:38:27,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2020-12-22 05:38:27,204 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 246 [2020-12-22 05:38:27,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:38:27,207 INFO L225 Difference]: With dead ends: 256 [2020-12-22 05:38:27,207 INFO L226 Difference]: Without dead ends: 252 [2020-12-22 05:38:27,208 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1128 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=3577, Invalid=5929, Unknown=0, NotChecked=0, Total=9506 [2020-12-22 05:38:27,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2020-12-22 05:38:27,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 252. [2020-12-22 05:38:27,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 252 states. [2020-12-22 05:38:27,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 300 transitions. [2020-12-22 05:38:27,221 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 300 transitions. Word has length 246 [2020-12-22 05:38:27,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:38:27,221 INFO L481 AbstractCegarLoop]: Abstraction has 252 states and 300 transitions. [2020-12-22 05:38:27,221 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-12-22 05:38:27,222 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 300 transitions. [2020-12-22 05:38:27,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2020-12-22 05:38:27,223 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:38:27,223 INFO L422 BasicCegarLoop]: trace histogram [49, 48, 48, 48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:38:27,430 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:38:27,431 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:38:27,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:38:27,431 INFO L82 PathProgramCache]: Analyzing trace with hash -94733653, now seen corresponding path program 48 times [2020-12-22 05:38:27,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:38:27,432 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33388550] [2020-12-22 05:38:27,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:38:27,440 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:38:27,441 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1588358978] [2020-12-22 05:38:27,441 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 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:38:27,887 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2020-12-22 05:38:27,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 05:38:27,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 981 conjuncts, 99 conjunts are in the unsatisfiable core [2020-12-22 05:38:27,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:38:29,896 INFO L134 CoverageAnalysis]: Checked inductivity of 5736 backedges. 0 proven. 5736 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:38:29,897 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33388550] [2020-12-22 05:38:29,897 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:38:29,897 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588358978] [2020-12-22 05:38:29,897 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:38:29,897 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2020-12-22 05:38:29,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215047868] [2020-12-22 05:38:29,897 INFO L461 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-12-22 05:38:29,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:38:29,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-12-22 05:38:29,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2020-12-22 05:38:29,898 INFO L87 Difference]: Start difference. First operand 252 states and 300 transitions. Second operand 52 states. [2020-12-22 05:38:32,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:38:32,160 INFO L93 Difference]: Finished difference Result 261 states and 310 transitions. [2020-12-22 05:38:32,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2020-12-22 05:38:32,161 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 251 [2020-12-22 05:38:32,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:38:32,162 INFO L225 Difference]: With dead ends: 261 [2020-12-22 05:38:32,162 INFO L226 Difference]: Without dead ends: 257 [2020-12-22 05:38:32,163 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1176 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=3725, Invalid=6175, Unknown=0, NotChecked=0, Total=9900 [2020-12-22 05:38:32,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2020-12-22 05:38:32,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 257. [2020-12-22 05:38:32,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 257 states. [2020-12-22 05:38:32,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 306 transitions. [2020-12-22 05:38:32,177 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 306 transitions. Word has length 251 [2020-12-22 05:38:32,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:38:32,177 INFO L481 AbstractCegarLoop]: Abstraction has 257 states and 306 transitions. [2020-12-22 05:38:32,178 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-12-22 05:38:32,178 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 306 transitions. [2020-12-22 05:38:32,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2020-12-22 05:38:32,179 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:38:32,179 INFO L422 BasicCegarLoop]: trace histogram [50, 49, 49, 49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:38:32,394 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2020-12-22 05:38:32,395 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:38:32,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:38:32,395 INFO L82 PathProgramCache]: Analyzing trace with hash 1082904153, now seen corresponding path program 49 times [2020-12-22 05:38:32,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:38:32,396 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1797012053] [2020-12-22 05:38:32,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:38:32,404 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:38:32,404 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1994375067] [2020-12-22 05:38:32,405 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 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:38:32,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:38:32,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 1000 conjuncts, 101 conjunts are in the unsatisfiable core [2020-12-22 05:38:32,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:38:34,639 INFO L134 CoverageAnalysis]: Checked inductivity of 5978 backedges. 0 proven. 5978 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:38:34,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1797012053] [2020-12-22 05:38:34,640 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:38:34,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994375067] [2020-12-22 05:38:34,640 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:38:34,640 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2020-12-22 05:38:34,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423056122] [2020-12-22 05:38:34,641 INFO L461 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-12-22 05:38:34,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:38:34,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-12-22 05:38:34,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2020-12-22 05:38:34,642 INFO L87 Difference]: Start difference. First operand 257 states and 306 transitions. Second operand 53 states. [2020-12-22 05:38:36,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:38:36,932 INFO L93 Difference]: Finished difference Result 266 states and 316 transitions. [2020-12-22 05:38:36,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2020-12-22 05:38:36,932 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 256 [2020-12-22 05:38:36,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:38:36,934 INFO L225 Difference]: With dead ends: 266 [2020-12-22 05:38:36,934 INFO L226 Difference]: Without dead ends: 262 [2020-12-22 05:38:36,935 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1225 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=3876, Invalid=6426, Unknown=0, NotChecked=0, Total=10302 [2020-12-22 05:38:36,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2020-12-22 05:38:36,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 262. [2020-12-22 05:38:36,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 262 states. [2020-12-22 05:38:36,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 312 transitions. [2020-12-22 05:38:36,947 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 312 transitions. Word has length 256 [2020-12-22 05:38:36,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:38:36,947 INFO L481 AbstractCegarLoop]: Abstraction has 262 states and 312 transitions. [2020-12-22 05:38:36,947 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-12-22 05:38:36,947 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 312 transitions. [2020-12-22 05:38:36,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2020-12-22 05:38:36,948 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:38:36,948 INFO L422 BasicCegarLoop]: trace histogram [51, 50, 50, 50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:38:37,148 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:38:37,149 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:38:37,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:38:37,150 INFO L82 PathProgramCache]: Analyzing trace with hash -64907413, now seen corresponding path program 50 times [2020-12-22 05:38:37,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:38:37,150 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676541545] [2020-12-22 05:38:37,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:38:37,159 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:38:37,159 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1311513113] [2020-12-22 05:38:37,159 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 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:38:37,387 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 05:38:37,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 05:38:37,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 1019 conjuncts, 103 conjunts are in the unsatisfiable core [2020-12-22 05:38:37,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:38:39,623 INFO L134 CoverageAnalysis]: Checked inductivity of 6225 backedges. 0 proven. 6225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:38:39,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676541545] [2020-12-22 05:38:39,624 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:38:39,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311513113] [2020-12-22 05:38:39,624 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:38:39,624 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2020-12-22 05:38:39,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056744936] [2020-12-22 05:38:39,625 INFO L461 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-12-22 05:38:39,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:38:39,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-12-22 05:38:39,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2020-12-22 05:38:39,626 INFO L87 Difference]: Start difference. First operand 262 states and 312 transitions. Second operand 54 states. [2020-12-22 05:38:42,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:38:42,035 INFO L93 Difference]: Finished difference Result 271 states and 322 transitions. [2020-12-22 05:38:42,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2020-12-22 05:38:42,036 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 261 [2020-12-22 05:38:42,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:38:42,038 INFO L225 Difference]: With dead ends: 271 [2020-12-22 05:38:42,038 INFO L226 Difference]: Without dead ends: 267 [2020-12-22 05:38:42,040 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1275 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=4030, Invalid=6682, Unknown=0, NotChecked=0, Total=10712 [2020-12-22 05:38:42,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2020-12-22 05:38:42,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 267. [2020-12-22 05:38:42,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 267 states. [2020-12-22 05:38:42,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 318 transitions. [2020-12-22 05:38:42,060 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 318 transitions. Word has length 261 [2020-12-22 05:38:42,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:38:42,061 INFO L481 AbstractCegarLoop]: Abstraction has 267 states and 318 transitions. [2020-12-22 05:38:42,061 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-12-22 05:38:42,061 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 318 transitions. [2020-12-22 05:38:42,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2020-12-22 05:38:42,062 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:38:42,062 INFO L422 BasicCegarLoop]: trace histogram [52, 51, 51, 51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:38:42,275 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2020-12-22 05:38:42,276 INFO L429 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:38:42,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:38:42,276 INFO L82 PathProgramCache]: Analyzing trace with hash 1383639449, now seen corresponding path program 51 times [2020-12-22 05:38:42,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:38:42,277 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993786201] [2020-12-22 05:38:42,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:38:42,285 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:38:42,286 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1918982753] [2020-12-22 05:38:42,286 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 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:38:42,773 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 52 check-sat command(s) [2020-12-22 05:38:42,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 05:38:42,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 1038 conjuncts, 105 conjunts are in the unsatisfiable core [2020-12-22 05:38:42,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:38:45,074 INFO L134 CoverageAnalysis]: Checked inductivity of 6477 backedges. 0 proven. 6477 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:38:45,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993786201] [2020-12-22 05:38:45,075 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:38:45,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918982753] [2020-12-22 05:38:45,075 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:38:45,075 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2020-12-22 05:38:45,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598208581] [2020-12-22 05:38:45,076 INFO L461 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-12-22 05:38:45,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:38:45,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-12-22 05:38:45,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1433, Invalid=1537, Unknown=0, NotChecked=0, Total=2970 [2020-12-22 05:38:45,076 INFO L87 Difference]: Start difference. First operand 267 states and 318 transitions. Second operand 55 states. [2020-12-22 05:38:47,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:38:47,697 INFO L93 Difference]: Finished difference Result 276 states and 328 transitions. [2020-12-22 05:38:47,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2020-12-22 05:38:47,698 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 266 [2020-12-22 05:38:47,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:38:47,699 INFO L225 Difference]: With dead ends: 276 [2020-12-22 05:38:47,699 INFO L226 Difference]: Without dead ends: 272 [2020-12-22 05:38:47,700 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1326 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=4187, Invalid=6943, Unknown=0, NotChecked=0, Total=11130 [2020-12-22 05:38:47,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2020-12-22 05:38:47,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 272. [2020-12-22 05:38:47,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 272 states. [2020-12-22 05:38:47,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 324 transitions. [2020-12-22 05:38:47,714 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 324 transitions. Word has length 266 [2020-12-22 05:38:47,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:38:47,714 INFO L481 AbstractCegarLoop]: Abstraction has 272 states and 324 transitions. [2020-12-22 05:38:47,714 INFO L482 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-12-22 05:38:47,714 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 324 transitions. [2020-12-22 05:38:47,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2020-12-22 05:38:47,716 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:38:47,716 INFO L422 BasicCegarLoop]: trace histogram [53, 52, 52, 52, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:38:47,929 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2020-12-22 05:38:47,930 INFO L429 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:38:47,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:38:47,931 INFO L82 PathProgramCache]: Analyzing trace with hash 1614529579, now seen corresponding path program 52 times [2020-12-22 05:38:47,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:38:47,931 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364791503] [2020-12-22 05:38:47,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:38:47,940 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:38:47,940 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1316969838] [2020-12-22 05:38:47,940 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 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:38:48,186 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 05:38:48,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 05:38:48,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 1057 conjuncts, 107 conjunts are in the unsatisfiable core [2020-12-22 05:38:48,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:38:50,589 INFO L134 CoverageAnalysis]: Checked inductivity of 6734 backedges. 0 proven. 6734 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:38:50,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364791503] [2020-12-22 05:38:50,589 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:38:50,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316969838] [2020-12-22 05:38:50,589 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:38:50,590 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2020-12-22 05:38:50,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314680074] [2020-12-22 05:38:50,590 INFO L461 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-12-22 05:38:50,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:38:50,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-12-22 05:38:50,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2020-12-22 05:38:50,591 INFO L87 Difference]: Start difference. First operand 272 states and 324 transitions. Second operand 56 states. [2020-12-22 05:38:53,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:38:53,231 INFO L93 Difference]: Finished difference Result 281 states and 334 transitions. [2020-12-22 05:38:53,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2020-12-22 05:38:53,232 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 271 [2020-12-22 05:38:53,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:38:53,234 INFO L225 Difference]: With dead ends: 281 [2020-12-22 05:38:53,234 INFO L226 Difference]: Without dead ends: 277 [2020-12-22 05:38:53,235 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1378 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=4347, Invalid=7209, Unknown=0, NotChecked=0, Total=11556 [2020-12-22 05:38:53,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2020-12-22 05:38:53,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 277. [2020-12-22 05:38:53,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 277 states. [2020-12-22 05:38:53,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 330 transitions. [2020-12-22 05:38:53,249 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 330 transitions. Word has length 271 [2020-12-22 05:38:53,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:38:53,250 INFO L481 AbstractCegarLoop]: Abstraction has 277 states and 330 transitions. [2020-12-22 05:38:53,250 INFO L482 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-12-22 05:38:53,250 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 330 transitions. [2020-12-22 05:38:53,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2020-12-22 05:38:53,251 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:38:53,251 INFO L422 BasicCegarLoop]: trace histogram [54, 53, 53, 53, 53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:38:53,464 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:38:53,465 INFO L429 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:38:53,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:38:53,465 INFO L82 PathProgramCache]: Analyzing trace with hash -881036071, now seen corresponding path program 53 times [2020-12-22 05:38:53,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:38:53,466 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324180770] [2020-12-22 05:38:53,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:38:53,474 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:38:53,474 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [136034057] [2020-12-22 05:38:53,474 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 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:38:53,848 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 54 check-sat command(s) [2020-12-22 05:38:53,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 05:38:53,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 1076 conjuncts, 109 conjunts are in the unsatisfiable core [2020-12-22 05:38:53,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:38:56,380 INFO L134 CoverageAnalysis]: Checked inductivity of 6996 backedges. 0 proven. 6996 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:38:56,381 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324180770] [2020-12-22 05:38:56,381 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:38:56,381 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136034057] [2020-12-22 05:38:56,381 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:38:56,381 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2020-12-22 05:38:56,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428669532] [2020-12-22 05:38:56,382 INFO L461 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-12-22 05:38:56,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:38:56,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-12-22 05:38:56,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1542, Invalid=1650, Unknown=0, NotChecked=0, Total=3192 [2020-12-22 05:38:56,382 INFO L87 Difference]: Start difference. First operand 277 states and 330 transitions. Second operand 57 states. [2020-12-22 05:38:59,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:38:59,125 INFO L93 Difference]: Finished difference Result 286 states and 340 transitions. [2020-12-22 05:38:59,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2020-12-22 05:38:59,126 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 276 [2020-12-22 05:38:59,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:38:59,127 INFO L225 Difference]: With dead ends: 286 [2020-12-22 05:38:59,127 INFO L226 Difference]: Without dead ends: 282 [2020-12-22 05:38:59,128 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 220 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1431 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=4510, Invalid=7480, Unknown=0, NotChecked=0, Total=11990 [2020-12-22 05:38:59,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2020-12-22 05:38:59,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 282. [2020-12-22 05:38:59,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 282 states. [2020-12-22 05:38:59,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 336 transitions. [2020-12-22 05:38:59,137 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 336 transitions. Word has length 276 [2020-12-22 05:38:59,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:38:59,137 INFO L481 AbstractCegarLoop]: Abstraction has 282 states and 336 transitions. [2020-12-22 05:38:59,137 INFO L482 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-12-22 05:38:59,137 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 336 transitions. [2020-12-22 05:38:59,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2020-12-22 05:38:59,138 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:38:59,138 INFO L422 BasicCegarLoop]: trace histogram [55, 54, 54, 54, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:38:59,339 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2020-12-22 05:38:59,339 INFO L429 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:38:59,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:38:59,340 INFO L82 PathProgramCache]: Analyzing trace with hash -434831125, now seen corresponding path program 54 times [2020-12-22 05:38:59,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:38:59,340 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009144656] [2020-12-22 05:38:59,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:38:59,347 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:38:59,348 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1061490750] [2020-12-22 05:38:59,348 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 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:38:59,941 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2020-12-22 05:38:59,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 05:38:59,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 1095 conjuncts, 111 conjunts are in the unsatisfiable core [2020-12-22 05:38:59,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:39:02,530 INFO L134 CoverageAnalysis]: Checked inductivity of 7263 backedges. 0 proven. 7263 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:39:02,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009144656] [2020-12-22 05:39:02,530 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:39:02,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061490750] [2020-12-22 05:39:02,530 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:39:02,531 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2020-12-22 05:39:02,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240256881] [2020-12-22 05:39:02,531 INFO L461 AbstractCegarLoop]: Interpolant automaton has 58 states [2020-12-22 05:39:02,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:39:02,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2020-12-22 05:39:02,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1598, Invalid=1708, Unknown=0, NotChecked=0, Total=3306 [2020-12-22 05:39:02,532 INFO L87 Difference]: Start difference. First operand 282 states and 336 transitions. Second operand 58 states. [2020-12-22 05:39:05,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:39:05,356 INFO L93 Difference]: Finished difference Result 291 states and 346 transitions. [2020-12-22 05:39:05,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2020-12-22 05:39:05,357 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 281 [2020-12-22 05:39:05,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:39:05,359 INFO L225 Difference]: With dead ends: 291 [2020-12-22 05:39:05,359 INFO L226 Difference]: Without dead ends: 287 [2020-12-22 05:39:05,360 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 224 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1485 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=4676, Invalid=7756, Unknown=0, NotChecked=0, Total=12432 [2020-12-22 05:39:05,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2020-12-22 05:39:05,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 287. [2020-12-22 05:39:05,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 287 states. [2020-12-22 05:39:05,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 342 transitions. [2020-12-22 05:39:05,373 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 342 transitions. Word has length 281 [2020-12-22 05:39:05,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:39:05,373 INFO L481 AbstractCegarLoop]: Abstraction has 287 states and 342 transitions. [2020-12-22 05:39:05,374 INFO L482 AbstractCegarLoop]: Interpolant automaton has 58 states. [2020-12-22 05:39:05,374 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 342 transitions. [2020-12-22 05:39:05,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2020-12-22 05:39:05,376 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:39:05,376 INFO L422 BasicCegarLoop]: trace histogram [56, 55, 55, 55, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:39:05,586 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:39:05,587 INFO L429 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:39:05,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:39:05,587 INFO L82 PathProgramCache]: Analyzing trace with hash -1347735527, now seen corresponding path program 55 times [2020-12-22 05:39:05,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:39:05,588 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702468553] [2020-12-22 05:39:05,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:39:05,596 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:39:05,596 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [26409794] [2020-12-22 05:39:05,597 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 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:39:05,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:39:05,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 1114 conjuncts, 113 conjunts are in the unsatisfiable core [2020-12-22 05:39:05,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:39:08,564 INFO L134 CoverageAnalysis]: Checked inductivity of 7535 backedges. 0 proven. 7535 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:39:08,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702468553] [2020-12-22 05:39:08,564 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:39:08,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26409794] [2020-12-22 05:39:08,565 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:39:08,565 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58] total 58 [2020-12-22 05:39:08,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353232585] [2020-12-22 05:39:08,565 INFO L461 AbstractCegarLoop]: Interpolant automaton has 59 states [2020-12-22 05:39:08,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:39:08,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2020-12-22 05:39:08,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1655, Invalid=1767, Unknown=0, NotChecked=0, Total=3422 [2020-12-22 05:39:08,566 INFO L87 Difference]: Start difference. First operand 287 states and 342 transitions. Second operand 59 states. [2020-12-22 05:39:11,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:39:11,480 INFO L93 Difference]: Finished difference Result 296 states and 352 transitions. [2020-12-22 05:39:11,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2020-12-22 05:39:11,482 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 286 [2020-12-22 05:39:11,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:39:11,484 INFO L225 Difference]: With dead ends: 296 [2020-12-22 05:39:11,484 INFO L226 Difference]: Without dead ends: 292 [2020-12-22 05:39:11,485 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 340 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1540 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=4845, Invalid=8037, Unknown=0, NotChecked=0, Total=12882 [2020-12-22 05:39:11,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2020-12-22 05:39:11,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 292. [2020-12-22 05:39:11,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 292 states. [2020-12-22 05:39:11,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 348 transitions. [2020-12-22 05:39:11,498 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 348 transitions. Word has length 286 [2020-12-22 05:39:11,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:39:11,499 INFO L481 AbstractCegarLoop]: Abstraction has 292 states and 348 transitions. [2020-12-22 05:39:11,499 INFO L482 AbstractCegarLoop]: Interpolant automaton has 59 states. [2020-12-22 05:39:11,499 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 348 transitions. [2020-12-22 05:39:11,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 292 [2020-12-22 05:39:11,500 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:39:11,500 INFO L422 BasicCegarLoop]: trace histogram [57, 56, 56, 56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:39:11,713 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2020-12-22 05:39:11,714 INFO L429 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:39:11,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:39:11,714 INFO L82 PathProgramCache]: Analyzing trace with hash -166113877, now seen corresponding path program 56 times [2020-12-22 05:39:11,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:39:11,715 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647203017] [2020-12-22 05:39:11,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:39:11,722 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:39:11,723 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [101690925] [2020-12-22 05:39:11,723 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 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:39:11,954 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 05:39:11,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 05:39:11,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 1133 conjuncts, 115 conjunts are in the unsatisfiable core [2020-12-22 05:39:11,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:39:14,742 INFO L134 CoverageAnalysis]: Checked inductivity of 7812 backedges. 0 proven. 7812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:39:14,743 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647203017] [2020-12-22 05:39:14,743 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:39:14,743 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101690925] [2020-12-22 05:39:14,743 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:39:14,743 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59] total 59 [2020-12-22 05:39:14,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445717704] [2020-12-22 05:39:14,744 INFO L461 AbstractCegarLoop]: Interpolant automaton has 60 states [2020-12-22 05:39:14,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:39:14,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2020-12-22 05:39:14,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1713, Invalid=1827, Unknown=0, NotChecked=0, Total=3540 [2020-12-22 05:39:14,745 INFO L87 Difference]: Start difference. First operand 292 states and 348 transitions. Second operand 60 states. [2020-12-22 05:39:17,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:39:17,832 INFO L93 Difference]: Finished difference Result 301 states and 358 transitions. [2020-12-22 05:39:17,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2020-12-22 05:39:17,833 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 291 [2020-12-22 05:39:17,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:39:17,834 INFO L225 Difference]: With dead ends: 301 [2020-12-22 05:39:17,834 INFO L226 Difference]: Without dead ends: 297 [2020-12-22 05:39:17,835 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 346 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1596 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=5017, Invalid=8323, Unknown=0, NotChecked=0, Total=13340 [2020-12-22 05:39:17,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2020-12-22 05:39:17,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 297. [2020-12-22 05:39:17,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 297 states. [2020-12-22 05:39:17,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 354 transitions. [2020-12-22 05:39:17,845 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 354 transitions. Word has length 291 [2020-12-22 05:39:17,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:39:17,846 INFO L481 AbstractCegarLoop]: Abstraction has 297 states and 354 transitions. [2020-12-22 05:39:17,846 INFO L482 AbstractCegarLoop]: Interpolant automaton has 60 states. [2020-12-22 05:39:17,846 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 354 transitions. [2020-12-22 05:39:17,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 297 [2020-12-22 05:39:17,847 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:39:17,847 INFO L422 BasicCegarLoop]: trace histogram [58, 57, 57, 57, 57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:39:18,062 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2020-12-22 05:39:18,063 INFO L429 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:39:18,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:39:18,063 INFO L82 PathProgramCache]: Analyzing trace with hash -99034279, now seen corresponding path program 57 times [2020-12-22 05:39:18,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:39:18,064 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363341013] [2020-12-22 05:39:18,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:39:18,074 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:39:18,075 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1224554616] [2020-12-22 05:39:18,075 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 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:39:18,626 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 58 check-sat command(s) [2020-12-22 05:39:18,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 05:39:18,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 1152 conjuncts, 117 conjunts are in the unsatisfiable core [2020-12-22 05:39:18,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:39:21,569 INFO L134 CoverageAnalysis]: Checked inductivity of 8094 backedges. 0 proven. 8094 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:39:21,569 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363341013] [2020-12-22 05:39:21,569 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:39:21,569 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224554616] [2020-12-22 05:39:21,569 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:39:21,570 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60] total 60 [2020-12-22 05:39:21,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565476378] [2020-12-22 05:39:21,570 INFO L461 AbstractCegarLoop]: Interpolant automaton has 61 states [2020-12-22 05:39:21,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:39:21,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2020-12-22 05:39:21,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1772, Invalid=1888, Unknown=0, NotChecked=0, Total=3660 [2020-12-22 05:39:21,571 INFO L87 Difference]: Start difference. First operand 297 states and 354 transitions. Second operand 61 states. [2020-12-22 05:39:24,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:39:24,775 INFO L93 Difference]: Finished difference Result 306 states and 364 transitions. [2020-12-22 05:39:24,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2020-12-22 05:39:24,776 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 296 [2020-12-22 05:39:24,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:39:24,777 INFO L225 Difference]: With dead ends: 306 [2020-12-22 05:39:24,777 INFO L226 Difference]: Without dead ends: 302 [2020-12-22 05:39:24,778 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 236 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1653 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=5192, Invalid=8614, Unknown=0, NotChecked=0, Total=13806 [2020-12-22 05:39:24,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2020-12-22 05:39:24,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 302. [2020-12-22 05:39:24,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 302 states. [2020-12-22 05:39:24,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 360 transitions. [2020-12-22 05:39:24,795 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 360 transitions. Word has length 296 [2020-12-22 05:39:24,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:39:24,795 INFO L481 AbstractCegarLoop]: Abstraction has 302 states and 360 transitions. [2020-12-22 05:39:24,795 INFO L482 AbstractCegarLoop]: Interpolant automaton has 61 states. [2020-12-22 05:39:24,795 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 360 transitions. [2020-12-22 05:39:24,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 302 [2020-12-22 05:39:24,797 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:39:24,797 INFO L422 BasicCegarLoop]: trace histogram [59, 58, 58, 58, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:39:25,012 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,61 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:39:25,013 INFO L429 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:39:25,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:39:25,014 INFO L82 PathProgramCache]: Analyzing trace with hash 1639230059, now seen corresponding path program 58 times [2020-12-22 05:39:25,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:39:25,014 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116944614] [2020-12-22 05:39:25,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:39:25,022 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:39:25,022 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1597537579] [2020-12-22 05:39:25,022 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 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:39:25,307 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 05:39:25,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 05:39:25,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 1171 conjuncts, 119 conjunts are in the unsatisfiable core [2020-12-22 05:39:25,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:39:28,309 INFO L134 CoverageAnalysis]: Checked inductivity of 8381 backedges. 0 proven. 8381 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:39:28,309 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116944614] [2020-12-22 05:39:28,309 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:39:28,309 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597537579] [2020-12-22 05:39:28,309 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:39:28,310 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61] total 61 [2020-12-22 05:39:28,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059606144] [2020-12-22 05:39:28,310 INFO L461 AbstractCegarLoop]: Interpolant automaton has 62 states [2020-12-22 05:39:28,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:39:28,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2020-12-22 05:39:28,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1832, Invalid=1950, Unknown=0, NotChecked=0, Total=3782 [2020-12-22 05:39:28,311 INFO L87 Difference]: Start difference. First operand 302 states and 360 transitions. Second operand 62 states. [2020-12-22 05:39:31,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:39:31,645 INFO L93 Difference]: Finished difference Result 311 states and 370 transitions. [2020-12-22 05:39:31,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2020-12-22 05:39:31,646 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 301 [2020-12-22 05:39:31,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:39:31,647 INFO L225 Difference]: With dead ends: 311 [2020-12-22 05:39:31,647 INFO L226 Difference]: Without dead ends: 307 [2020-12-22 05:39:31,648 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 358 GetRequests, 240 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1711 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=5370, Invalid=8910, Unknown=0, NotChecked=0, Total=14280 [2020-12-22 05:39:31,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2020-12-22 05:39:31,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 307. [2020-12-22 05:39:31,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 307 states. [2020-12-22 05:39:31,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 366 transitions. [2020-12-22 05:39:31,670 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 366 transitions. Word has length 301 [2020-12-22 05:39:31,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:39:31,670 INFO L481 AbstractCegarLoop]: Abstraction has 307 states and 366 transitions. [2020-12-22 05:39:31,670 INFO L482 AbstractCegarLoop]: Interpolant automaton has 62 states. [2020-12-22 05:39:31,670 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 366 transitions. [2020-12-22 05:39:31,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 307 [2020-12-22 05:39:31,672 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:39:31,672 INFO L422 BasicCegarLoop]: trace histogram [60, 59, 59, 59, 59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:39:31,879 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:39:31,880 INFO L429 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:39:31,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:39:31,880 INFO L82 PathProgramCache]: Analyzing trace with hash -589728103, now seen corresponding path program 59 times [2020-12-22 05:39:31,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:39:31,881 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295875269] [2020-12-22 05:39:31,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:39:31,891 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:39:31,891 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1602658367] [2020-12-22 05:39:31,891 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 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:39:32,334 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 60 check-sat command(s) [2020-12-22 05:39:32,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 05:39:32,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 1190 conjuncts, 121 conjunts are in the unsatisfiable core [2020-12-22 05:39:32,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:39:35,453 INFO L134 CoverageAnalysis]: Checked inductivity of 8673 backedges. 0 proven. 8673 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:39:35,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295875269] [2020-12-22 05:39:35,454 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:39:35,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602658367] [2020-12-22 05:39:35,454 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:39:35,454 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62] total 62 [2020-12-22 05:39:35,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821671090] [2020-12-22 05:39:35,454 INFO L461 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-12-22 05:39:35,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:39:35,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-12-22 05:39:35,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1893, Invalid=2013, Unknown=0, NotChecked=0, Total=3906 [2020-12-22 05:39:35,458 INFO L87 Difference]: Start difference. First operand 307 states and 366 transitions. Second operand 63 states. [2020-12-22 05:39:38,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:39:38,964 INFO L93 Difference]: Finished difference Result 316 states and 376 transitions. [2020-12-22 05:39:38,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2020-12-22 05:39:38,965 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 306 [2020-12-22 05:39:38,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:39:38,966 INFO L225 Difference]: With dead ends: 316 [2020-12-22 05:39:38,966 INFO L226 Difference]: Without dead ends: 312 [2020-12-22 05:39:38,968 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 364 GetRequests, 244 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1770 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=5551, Invalid=9211, Unknown=0, NotChecked=0, Total=14762 [2020-12-22 05:39:38,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2020-12-22 05:39:38,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 312. [2020-12-22 05:39:38,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 312 states. [2020-12-22 05:39:38,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 372 transitions. [2020-12-22 05:39:38,987 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 372 transitions. Word has length 306 [2020-12-22 05:39:38,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:39:38,987 INFO L481 AbstractCegarLoop]: Abstraction has 312 states and 372 transitions. [2020-12-22 05:39:38,987 INFO L482 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-12-22 05:39:38,987 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 372 transitions. [2020-12-22 05:39:38,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 312 [2020-12-22 05:39:38,989 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:39:38,989 INFO L422 BasicCegarLoop]: trace histogram [61, 60, 60, 60, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:39:39,203 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:39:39,204 INFO L429 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:39:39,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:39:39,205 INFO L82 PathProgramCache]: Analyzing trace with hash 592647979, now seen corresponding path program 60 times [2020-12-22 05:39:39,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:39:39,205 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770427755] [2020-12-22 05:39:39,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:39:39,216 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:39:39,216 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1128717341] [2020-12-22 05:39:39,216 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 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:39:39,898 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 61 check-sat command(s) [2020-12-22 05:39:39,898 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 05:39:39,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 1209 conjuncts, 123 conjunts are in the unsatisfiable core [2020-12-22 05:39:39,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:39:43,181 INFO L134 CoverageAnalysis]: Checked inductivity of 8970 backedges. 0 proven. 8970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:39:43,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770427755] [2020-12-22 05:39:43,181 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:39:43,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128717341] [2020-12-22 05:39:43,181 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:39:43,182 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63] total 63 [2020-12-22 05:39:43,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532269070] [2020-12-22 05:39:43,182 INFO L461 AbstractCegarLoop]: Interpolant automaton has 64 states [2020-12-22 05:39:43,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:39:43,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2020-12-22 05:39:43,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1955, Invalid=2077, Unknown=0, NotChecked=0, Total=4032 [2020-12-22 05:39:43,184 INFO L87 Difference]: Start difference. First operand 312 states and 372 transitions. Second operand 64 states. [2020-12-22 05:39:46,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:39:46,796 INFO L93 Difference]: Finished difference Result 321 states and 382 transitions. [2020-12-22 05:39:46,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2020-12-22 05:39:46,797 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 311 [2020-12-22 05:39:46,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:39:46,799 INFO L225 Difference]: With dead ends: 321 [2020-12-22 05:39:46,799 INFO L226 Difference]: Without dead ends: 317 [2020-12-22 05:39:46,800 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 370 GetRequests, 248 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1830 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=5735, Invalid=9517, Unknown=0, NotChecked=0, Total=15252 [2020-12-22 05:39:46,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2020-12-22 05:39:46,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 317. [2020-12-22 05:39:46,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 317 states. [2020-12-22 05:39:46,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 378 transitions. [2020-12-22 05:39:46,811 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 378 transitions. Word has length 311 [2020-12-22 05:39:46,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:39:46,811 INFO L481 AbstractCegarLoop]: Abstraction has 317 states and 378 transitions. [2020-12-22 05:39:46,811 INFO L482 AbstractCegarLoop]: Interpolant automaton has 64 states. [2020-12-22 05:39:46,812 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 378 transitions. [2020-12-22 05:39:46,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 317 [2020-12-22 05:39:46,813 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:39:46,813 INFO L422 BasicCegarLoop]: trace histogram [62, 61, 61, 61, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:39:47,014 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:39:47,015 INFO L429 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:39:47,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:39:47,015 INFO L82 PathProgramCache]: Analyzing trace with hash 16843225, now seen corresponding path program 61 times [2020-12-22 05:39:47,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:39:47,016 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324739134] [2020-12-22 05:39:47,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:39:47,029 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:39:47,031 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [828717015] [2020-12-22 05:39:47,031 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 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:39:47,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:39:47,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 1228 conjuncts, 125 conjunts are in the unsatisfiable core [2020-12-22 05:39:47,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:39:50,721 INFO L134 CoverageAnalysis]: Checked inductivity of 9272 backedges. 0 proven. 9272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:39:50,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324739134] [2020-12-22 05:39:50,721 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:39:50,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828717015] [2020-12-22 05:39:50,722 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:39:50,722 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64] total 64 [2020-12-22 05:39:50,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374338360] [2020-12-22 05:39:50,722 INFO L461 AbstractCegarLoop]: Interpolant automaton has 65 states [2020-12-22 05:39:50,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:39:50,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2020-12-22 05:39:50,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2018, Invalid=2142, Unknown=0, NotChecked=0, Total=4160 [2020-12-22 05:39:50,724 INFO L87 Difference]: Start difference. First operand 317 states and 378 transitions. Second operand 65 states. [2020-12-22 05:39:54,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:39:54,498 INFO L93 Difference]: Finished difference Result 326 states and 388 transitions. [2020-12-22 05:39:54,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2020-12-22 05:39:54,501 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 316 [2020-12-22 05:39:54,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:39:54,503 INFO L225 Difference]: With dead ends: 326 [2020-12-22 05:39:54,503 INFO L226 Difference]: Without dead ends: 322 [2020-12-22 05:39:54,504 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 376 GetRequests, 252 SyntacticMatches, 0 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1891 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=5922, Invalid=9828, Unknown=0, NotChecked=0, Total=15750 [2020-12-22 05:39:54,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2020-12-22 05:39:54,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 322. [2020-12-22 05:39:54,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 322 states. [2020-12-22 05:39:54,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 384 transitions. [2020-12-22 05:39:54,514 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 384 transitions. Word has length 316 [2020-12-22 05:39:54,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:39:54,514 INFO L481 AbstractCegarLoop]: Abstraction has 322 states and 384 transitions. [2020-12-22 05:39:54,514 INFO L482 AbstractCegarLoop]: Interpolant automaton has 65 states. [2020-12-22 05:39:54,514 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 384 transitions. [2020-12-22 05:39:54,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 322 [2020-12-22 05:39:54,515 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:39:54,516 INFO L422 BasicCegarLoop]: trace histogram [63, 62, 62, 62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:39:54,719 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:39:54,719 INFO L429 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:39:54,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:39:54,722 INFO L82 PathProgramCache]: Analyzing trace with hash 509645803, now seen corresponding path program 62 times [2020-12-22 05:39:54,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:39:54,723 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800369762] [2020-12-22 05:39:54,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:39:54,732 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:39:54,732 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1740239707] [2020-12-22 05:39:54,732 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 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:39:55,014 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 05:39:55,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 05:39:55,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 1247 conjuncts, 127 conjunts are in the unsatisfiable core [2020-12-22 05:39:55,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:39:58,589 INFO L134 CoverageAnalysis]: Checked inductivity of 9579 backedges. 0 proven. 9579 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:39:58,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800369762] [2020-12-22 05:39:58,589 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:39:58,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740239707] [2020-12-22 05:39:58,589 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:39:58,589 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65] total 65 [2020-12-22 05:39:58,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450881756] [2020-12-22 05:39:58,590 INFO L461 AbstractCegarLoop]: Interpolant automaton has 66 states [2020-12-22 05:39:58,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:39:58,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2020-12-22 05:39:58,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2082, Invalid=2208, Unknown=0, NotChecked=0, Total=4290 [2020-12-22 05:39:58,591 INFO L87 Difference]: Start difference. First operand 322 states and 384 transitions. Second operand 66 states. [2020-12-22 05:40:02,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:40:02,572 INFO L93 Difference]: Finished difference Result 331 states and 394 transitions. [2020-12-22 05:40:02,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2020-12-22 05:40:02,573 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 321 [2020-12-22 05:40:02,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:40:02,575 INFO L225 Difference]: With dead ends: 331 [2020-12-22 05:40:02,575 INFO L226 Difference]: Without dead ends: 327 [2020-12-22 05:40:02,576 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 382 GetRequests, 256 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1953 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=6112, Invalid=10144, Unknown=0, NotChecked=0, Total=16256 [2020-12-22 05:40:02,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 327 states. [2020-12-22 05:40:02,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 327 to 327. [2020-12-22 05:40:02,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 327 states. [2020-12-22 05:40:02,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 390 transitions. [2020-12-22 05:40:02,592 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 390 transitions. Word has length 321 [2020-12-22 05:40:02,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:40:02,593 INFO L481 AbstractCegarLoop]: Abstraction has 327 states and 390 transitions. [2020-12-22 05:40:02,593 INFO L482 AbstractCegarLoop]: Interpolant automaton has 66 states. [2020-12-22 05:40:02,593 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 390 transitions. [2020-12-22 05:40:02,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2020-12-22 05:40:02,594 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:40:02,595 INFO L422 BasicCegarLoop]: trace histogram [64, 63, 63, 63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:40:02,807 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2020-12-22 05:40:02,807 INFO L429 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:40:02,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:40:02,808 INFO L82 PathProgramCache]: Analyzing trace with hash -962364135, now seen corresponding path program 63 times [2020-12-22 05:40:02,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:40:02,808 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391276532] [2020-12-22 05:40:02,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:40:02,817 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:40:02,817 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [396419111] [2020-12-22 05:40:02,817 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 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:40:03,467 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 64 check-sat command(s) [2020-12-22 05:40:03,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 05:40:03,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 1266 conjuncts, 129 conjunts are in the unsatisfiable core [2020-12-22 05:40:03,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:40:07,351 INFO L134 CoverageAnalysis]: Checked inductivity of 9891 backedges. 0 proven. 9891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:40:07,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391276532] [2020-12-22 05:40:07,352 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:40:07,352 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396419111] [2020-12-22 05:40:07,352 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:40:07,352 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66] total 66 [2020-12-22 05:40:07,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020184] [2020-12-22 05:40:07,352 INFO L461 AbstractCegarLoop]: Interpolant automaton has 67 states [2020-12-22 05:40:07,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:40:07,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2020-12-22 05:40:07,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2147, Invalid=2275, Unknown=0, NotChecked=0, Total=4422 [2020-12-22 05:40:07,359 INFO L87 Difference]: Start difference. First operand 327 states and 390 transitions. Second operand 67 states. [2020-12-22 05:40:11,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:40:11,655 INFO L93 Difference]: Finished difference Result 336 states and 400 transitions. [2020-12-22 05:40:11,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2020-12-22 05:40:11,656 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 326 [2020-12-22 05:40:11,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:40:11,657 INFO L225 Difference]: With dead ends: 336 [2020-12-22 05:40:11,657 INFO L226 Difference]: Without dead ends: 332 [2020-12-22 05:40:11,658 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 388 GetRequests, 260 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2016 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=6305, Invalid=10465, Unknown=0, NotChecked=0, Total=16770 [2020-12-22 05:40:11,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2020-12-22 05:40:11,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 332. [2020-12-22 05:40:11,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 332 states. [2020-12-22 05:40:11,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 396 transitions. [2020-12-22 05:40:11,668 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 396 transitions. Word has length 326 [2020-12-22 05:40:11,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:40:11,669 INFO L481 AbstractCegarLoop]: Abstraction has 332 states and 396 transitions. [2020-12-22 05:40:11,669 INFO L482 AbstractCegarLoop]: Interpolant automaton has 67 states. [2020-12-22 05:40:11,669 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 396 transitions. [2020-12-22 05:40:11,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2020-12-22 05:40:11,670 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:40:11,670 INFO L422 BasicCegarLoop]: trace histogram [65, 64, 64, 64, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:40:11,870 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2020-12-22 05:40:11,871 INFO L429 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:40:11,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:40:11,872 INFO L82 PathProgramCache]: Analyzing trace with hash -548855637, now seen corresponding path program 64 times [2020-12-22 05:40:11,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:40:11,872 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219138300] [2020-12-22 05:40:11,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:40:11,880 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:40:11,880 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1600869035] [2020-12-22 05:40:11,881 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 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:40:12,183 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 05:40:12,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 05:40:12,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 1285 conjuncts, 131 conjunts are in the unsatisfiable core [2020-12-22 05:40:12,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:40:16,219 INFO L134 CoverageAnalysis]: Checked inductivity of 10208 backedges. 0 proven. 10208 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:40:16,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219138300] [2020-12-22 05:40:16,219 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:40:16,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1600869035] [2020-12-22 05:40:16,219 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:40:16,219 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67] total 67 [2020-12-22 05:40:16,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183129766] [2020-12-22 05:40:16,220 INFO L461 AbstractCegarLoop]: Interpolant automaton has 68 states [2020-12-22 05:40:16,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:40:16,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2020-12-22 05:40:16,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2213, Invalid=2343, Unknown=0, NotChecked=0, Total=4556 [2020-12-22 05:40:16,221 INFO L87 Difference]: Start difference. First operand 332 states and 396 transitions. Second operand 68 states. [2020-12-22 05:40:20,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:40:20,680 INFO L93 Difference]: Finished difference Result 341 states and 406 transitions. [2020-12-22 05:40:20,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2020-12-22 05:40:20,681 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 331 [2020-12-22 05:40:20,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:40:20,683 INFO L225 Difference]: With dead ends: 341 [2020-12-22 05:40:20,683 INFO L226 Difference]: Without dead ends: 337 [2020-12-22 05:40:20,684 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 394 GetRequests, 264 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2080 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=6501, Invalid=10791, Unknown=0, NotChecked=0, Total=17292 [2020-12-22 05:40:20,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2020-12-22 05:40:20,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 337. [2020-12-22 05:40:20,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 337 states. [2020-12-22 05:40:20,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 402 transitions. [2020-12-22 05:40:20,694 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 402 transitions. Word has length 331 [2020-12-22 05:40:20,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:40:20,694 INFO L481 AbstractCegarLoop]: Abstraction has 337 states and 402 transitions. [2020-12-22 05:40:20,694 INFO L482 AbstractCegarLoop]: Interpolant automaton has 68 states. [2020-12-22 05:40:20,694 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 402 transitions. [2020-12-22 05:40:20,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2020-12-22 05:40:20,695 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:40:20,695 INFO L422 BasicCegarLoop]: trace histogram [66, 65, 65, 65, 65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:40:20,896 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:40:20,896 INFO L429 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:40:20,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:40:20,897 INFO L82 PathProgramCache]: Analyzing trace with hash -2066421671, now seen corresponding path program 65 times [2020-12-22 05:40:20,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:40:20,897 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541634276] [2020-12-22 05:40:20,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:40:20,905 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:40:20,906 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2077683491] [2020-12-22 05:40:20,906 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 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:40:21,384 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 66 check-sat command(s) [2020-12-22 05:40:21,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 05:40:21,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 1304 conjuncts, 133 conjunts are in the unsatisfiable core [2020-12-22 05:40:21,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:40:25,603 INFO L134 CoverageAnalysis]: Checked inductivity of 10530 backedges. 0 proven. 10530 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:40:25,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541634276] [2020-12-22 05:40:25,604 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:40:25,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077683491] [2020-12-22 05:40:25,604 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:40:25,604 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68] total 68 [2020-12-22 05:40:25,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556691897] [2020-12-22 05:40:25,605 INFO L461 AbstractCegarLoop]: Interpolant automaton has 69 states [2020-12-22 05:40:25,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:40:25,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2020-12-22 05:40:25,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2280, Invalid=2412, Unknown=0, NotChecked=0, Total=4692 [2020-12-22 05:40:25,606 INFO L87 Difference]: Start difference. First operand 337 states and 402 transitions. Second operand 69 states. [2020-12-22 05:40:30,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:40:30,155 INFO L93 Difference]: Finished difference Result 346 states and 412 transitions. [2020-12-22 05:40:30,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2020-12-22 05:40:30,156 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 336 [2020-12-22 05:40:30,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:40:30,158 INFO L225 Difference]: With dead ends: 346 [2020-12-22 05:40:30,158 INFO L226 Difference]: Without dead ends: 342 [2020-12-22 05:40:30,159 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 400 GetRequests, 268 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2145 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=6700, Invalid=11122, Unknown=0, NotChecked=0, Total=17822 [2020-12-22 05:40:30,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2020-12-22 05:40:30,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 342. [2020-12-22 05:40:30,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 342 states. [2020-12-22 05:40:30,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 408 transitions. [2020-12-22 05:40:30,174 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 408 transitions. Word has length 336 [2020-12-22 05:40:30,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:40:30,175 INFO L481 AbstractCegarLoop]: Abstraction has 342 states and 408 transitions. [2020-12-22 05:40:30,175 INFO L482 AbstractCegarLoop]: Interpolant automaton has 69 states. [2020-12-22 05:40:30,175 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 408 transitions. [2020-12-22 05:40:30,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 342 [2020-12-22 05:40:30,176 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:40:30,177 INFO L422 BasicCegarLoop]: trace histogram [67, 66, 66, 66, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:40:30,389 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2020-12-22 05:40:30,390 INFO L429 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:40:30,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:40:30,391 INFO L82 PathProgramCache]: Analyzing trace with hash 1534639467, now seen corresponding path program 66 times [2020-12-22 05:40:30,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:40:30,391 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760364523] [2020-12-22 05:40:30,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:40:30,399 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:40:30,399 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1116227849] [2020-12-22 05:40:30,400 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 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:40:31,197 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 67 check-sat command(s) [2020-12-22 05:40:31,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 05:40:31,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 1323 conjuncts, 135 conjunts are in the unsatisfiable core [2020-12-22 05:40:31,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:40:35,568 INFO L134 CoverageAnalysis]: Checked inductivity of 10857 backedges. 0 proven. 10857 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:40:35,569 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760364523] [2020-12-22 05:40:35,569 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:40:35,569 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116227849] [2020-12-22 05:40:35,569 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:40:35,569 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69] total 69 [2020-12-22 05:40:35,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474532607] [2020-12-22 05:40:35,570 INFO L461 AbstractCegarLoop]: Interpolant automaton has 70 states [2020-12-22 05:40:35,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:40:35,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2020-12-22 05:40:35,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2348, Invalid=2482, Unknown=0, NotChecked=0, Total=4830 [2020-12-22 05:40:35,571 INFO L87 Difference]: Start difference. First operand 342 states and 408 transitions. Second operand 70 states. [2020-12-22 05:40:40,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:40:40,404 INFO L93 Difference]: Finished difference Result 351 states and 418 transitions. [2020-12-22 05:40:40,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2020-12-22 05:40:40,405 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 341 [2020-12-22 05:40:40,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:40:40,408 INFO L225 Difference]: With dead ends: 351 [2020-12-22 05:40:40,408 INFO L226 Difference]: Without dead ends: 347 [2020-12-22 05:40:40,409 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 406 GetRequests, 272 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2211 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=6902, Invalid=11458, Unknown=0, NotChecked=0, Total=18360 [2020-12-22 05:40:40,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2020-12-22 05:40:40,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 347. [2020-12-22 05:40:40,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 347 states. [2020-12-22 05:40:40,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 414 transitions. [2020-12-22 05:40:40,419 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 414 transitions. Word has length 341 [2020-12-22 05:40:40,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:40:40,419 INFO L481 AbstractCegarLoop]: Abstraction has 347 states and 414 transitions. [2020-12-22 05:40:40,419 INFO L482 AbstractCegarLoop]: Interpolant automaton has 70 states. [2020-12-22 05:40:40,420 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 414 transitions. [2020-12-22 05:40:40,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 347 [2020-12-22 05:40:40,421 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:40:40,421 INFO L422 BasicCegarLoop]: trace histogram [68, 67, 67, 67, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:40:40,621 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2020-12-22 05:40:40,622 INFO L429 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:40:40,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:40:40,622 INFO L82 PathProgramCache]: Analyzing trace with hash -911653991, now seen corresponding path program 67 times [2020-12-22 05:40:40,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:40:40,622 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586135619] [2020-12-22 05:40:40,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:40:40,630 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:40:40,630 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2145599790] [2020-12-22 05:40:40,630 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 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:40:40,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 05:40:40,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 1342 conjuncts, 137 conjunts are in the unsatisfiable core [2020-12-22 05:40:40,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:40:45,342 INFO L134 CoverageAnalysis]: Checked inductivity of 11189 backedges. 0 proven. 11189 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:40:45,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586135619] [2020-12-22 05:40:45,342 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:40:45,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145599790] [2020-12-22 05:40:45,342 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:40:45,343 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70] total 70 [2020-12-22 05:40:45,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286139042] [2020-12-22 05:40:45,343 INFO L461 AbstractCegarLoop]: Interpolant automaton has 71 states [2020-12-22 05:40:45,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:40:45,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2020-12-22 05:40:45,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2417, Invalid=2553, Unknown=0, NotChecked=0, Total=4970 [2020-12-22 05:40:45,344 INFO L87 Difference]: Start difference. First operand 347 states and 414 transitions. Second operand 71 states. [2020-12-22 05:40:50,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 05:40:50,508 INFO L93 Difference]: Finished difference Result 356 states and 424 transitions. [2020-12-22 05:40:50,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2020-12-22 05:40:50,510 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 346 [2020-12-22 05:40:50,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 05:40:50,512 INFO L225 Difference]: With dead ends: 356 [2020-12-22 05:40:50,512 INFO L226 Difference]: Without dead ends: 352 [2020-12-22 05:40:50,514 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 412 GetRequests, 276 SyntacticMatches, 0 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2278 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=7107, Invalid=11799, Unknown=0, NotChecked=0, Total=18906 [2020-12-22 05:40:50,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2020-12-22 05:40:50,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 352. [2020-12-22 05:40:50,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 352 states. [2020-12-22 05:40:50,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 420 transitions. [2020-12-22 05:40:50,532 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 420 transitions. Word has length 346 [2020-12-22 05:40:50,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 05:40:50,532 INFO L481 AbstractCegarLoop]: Abstraction has 352 states and 420 transitions. [2020-12-22 05:40:50,533 INFO L482 AbstractCegarLoop]: Interpolant automaton has 71 states. [2020-12-22 05:40:50,533 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 420 transitions. [2020-12-22 05:40:50,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 352 [2020-12-22 05:40:50,534 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 05:40:50,535 INFO L422 BasicCegarLoop]: trace histogram [69, 68, 68, 68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 05:40:50,748 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable70 [2020-12-22 05:40:50,748 INFO L429 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 05:40:50,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 05:40:50,750 INFO L82 PathProgramCache]: Analyzing trace with hash -1319409109, now seen corresponding path program 68 times [2020-12-22 05:40:50,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 05:40:50,752 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262667450] [2020-12-22 05:40:50,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 05:40:50,763 ERROR L270 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2020-12-22 05:40:50,763 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1090488594] [2020-12-22 05:40:50,764 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 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 05:40:51,078 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 05:40:51,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 05:40:51,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 1361 conjuncts, 139 conjunts are in the unsatisfiable core [2020-12-22 05:40:51,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 05:40:55,553 INFO L134 CoverageAnalysis]: Checked inductivity of 11526 backedges. 0 proven. 11526 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 05:40:55,553 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262667450] [2020-12-22 05:40:55,553 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-12-22 05:40:55,553 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090488594] [2020-12-22 05:40:55,553 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-12-22 05:40:55,554 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71] total 71 [2020-12-22 05:40:55,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481317097] [2020-12-22 05:40:55,554 INFO L461 AbstractCegarLoop]: Interpolant automaton has 72 states [2020-12-22 05:40:55,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 05:40:55,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2020-12-22 05:40:55,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2487, Invalid=2625, Unknown=0, NotChecked=0, Total=5112 [2020-12-22 05:40:55,556 INFO L87 Difference]: Start difference. First operand 352 states and 420 transitions. Second operand 72 states.