/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/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 08:02:08,506 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 08:02:08,509 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 08:02:08,550 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-12-22 08:02:08,564 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 08:02:08,565 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 08:02:08,566 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 08:02:08,568 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 08:02:08,569 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 08:02:08,570 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 08:02:08,581 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 08:02:08,586 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 08:02:08,591 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 08:02:08,595 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 08:02:08,598 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 08:02:08,599 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 08:02:08,605 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 08:02:08,622 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 08:02:08,623 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 08:02:08,625 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 08:02:08,626 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 08:02:08,675 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 08:02:08,675 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 08:02:08,677 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 08:02:08,677 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 08:02:08,677 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 08:02:08,678 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 08:02:08,678 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 08:02:08,678 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 08:02:08,678 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 08:02:08,679 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 08:02:08,679 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 08:02:08,679 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 08:02:08,679 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 08:02:08,679 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 08:02:08,680 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 08:02:08,680 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 08:02:08,680 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 08:02:08,680 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 08:02:08,680 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 08:02:08,681 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 08:02:08,681 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 08:02:08,681 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 08:02:08,681 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 08:02:08,681 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 08:02:08,682 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 08:02:08,682 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 08:02:09,070 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 08:02:09,103 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 08:02:09,108 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 08:02:09,111 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 08:02:09,112 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 08:02:09,113 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-12-22 08:02:09,214 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f0f567bc8/148ad4a12dfa46469b890833fbc2f53c/FLAG4b2d8bbf8 [2020-12-22 08:02:10,016 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 08:02:10,017 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-12-22 08:02:10,029 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f0f567bc8/148ad4a12dfa46469b890833fbc2f53c/FLAG4b2d8bbf8 [2020-12-22 08:02:10,280 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f0f567bc8/148ad4a12dfa46469b890833fbc2f53c [2020-12-22 08:02:10,286 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 08:02:10,290 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 08:02:10,294 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 08:02:10,294 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 08:02:10,299 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 08:02:10,300 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 08:02:10" (1/1) ... [2020-12-22 08:02:10,302 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@14ca08f7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:02:10, skipping insertion in model container [2020-12-22 08:02:10,303 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 08:02:10" (1/1) ... [2020-12-22 08:02:10,311 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 08:02:10,382 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 08:02:10,610 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/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[6777,6790] [2020-12-22 08:02:10,648 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 08:02:10,669 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 08:02:10,744 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/seq-mthreaded-reduced/pals_floodmax.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c[6777,6790] [2020-12-22 08:02:10,769 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 08:02:10,804 INFO L208 MainTranslator]: Completed translation [2020-12-22 08:02:10,805 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:02:10 WrapperNode [2020-12-22 08:02:10,805 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 08:02:10,808 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 08:02:10,808 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 08:02:10,809 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 08:02:10,820 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:02:10" (1/1) ... [2020-12-22 08:02:10,856 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:02:10" (1/1) ... [2020-12-22 08:02:10,945 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 08:02:10,948 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 08:02:10,948 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 08:02:10,948 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 08:02:10,963 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:02:10" (1/1) ... [2020-12-22 08:02:10,964 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:02:10" (1/1) ... [2020-12-22 08:02:10,981 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:02:10" (1/1) ... [2020-12-22 08:02:10,982 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:02:10" (1/1) ... [2020-12-22 08:02:11,007 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:02:10" (1/1) ... [2020-12-22 08:02:11,024 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:02:10" (1/1) ... [2020-12-22 08:02:11,033 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:02:10" (1/1) ... [2020-12-22 08:02:11,044 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 08:02:11,046 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 08:02:11,049 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 08:02:11,049 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 08:02:11,051 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:02:10" (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 08:02:11,164 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 08:02:11,164 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 08:02:11,164 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 08:02:11,165 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 08:02:12,387 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 08:02:12,387 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2020-12-22 08:02:12,390 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 08:02:12 BoogieIcfgContainer [2020-12-22 08:02:12,390 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 08:02:12,392 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 08:02:12,392 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 08:02:12,396 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 08:02:12,397 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 08:02:10" (1/3) ... [2020-12-22 08:02:12,398 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d36cb4c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 08:02:12, skipping insertion in model container [2020-12-22 08:02:12,398 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 08:02:10" (2/3) ... [2020-12-22 08:02:12,399 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d36cb4c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 08:02:12, skipping insertion in model container [2020-12-22 08:02:12,399 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 08:02:12" (3/3) ... [2020-12-22 08:02:12,401 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_floodmax.3.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-12-22 08:02:12,409 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 08:02:12,415 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 08:02:12,436 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 08:02:12,467 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 08:02:12,468 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 08:02:12,468 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 08:02:12,468 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 08:02:12,468 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 08:02:12,468 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 08:02:12,469 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 08:02:12,469 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 08:02:12,489 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states. [2020-12-22 08:02:12,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-12-22 08:02:12,500 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:02:12,501 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:02:12,502 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:02:12,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:02:12,512 INFO L82 PathProgramCache]: Analyzing trace with hash -278043806, now seen corresponding path program 1 times [2020-12-22 08:02:12,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:02:12,524 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217315000] [2020-12-22 08:02:12,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:02:12,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:02:13,018 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 08:02:13,019 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217315000] [2020-12-22 08:02:13,020 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:02:13,020 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:02:13,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785410234] [2020-12-22 08:02:13,027 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:02:13,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:02:13,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:02:13,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:02:13,045 INFO L87 Difference]: Start difference. First operand 134 states. Second operand 3 states. [2020-12-22 08:02:13,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:02:13,208 INFO L93 Difference]: Finished difference Result 297 states and 500 transitions. [2020-12-22 08:02:13,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:02:13,210 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 50 [2020-12-22 08:02:13,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:02:13,226 INFO L225 Difference]: With dead ends: 297 [2020-12-22 08:02:13,227 INFO L226 Difference]: Without dead ends: 205 [2020-12-22 08:02:13,231 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:02:13,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2020-12-22 08:02:13,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 202. [2020-12-22 08:02:13,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2020-12-22 08:02:13,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 321 transitions. [2020-12-22 08:02:13,390 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 321 transitions. Word has length 50 [2020-12-22 08:02:13,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:02:13,390 INFO L481 AbstractCegarLoop]: Abstraction has 202 states and 321 transitions. [2020-12-22 08:02:13,391 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:02:13,391 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 321 transitions. [2020-12-22 08:02:13,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-12-22 08:02:13,394 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:02:13,395 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:02:13,395 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 08:02:13,395 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:02:13,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:02:13,397 INFO L82 PathProgramCache]: Analyzing trace with hash 1333847823, now seen corresponding path program 1 times [2020-12-22 08:02:13,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:02:13,397 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482005227] [2020-12-22 08:02:13,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:02:13,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:02:13,590 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 08:02:13,591 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482005227] [2020-12-22 08:02:13,591 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:02:13,591 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:02:13,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634924822] [2020-12-22 08:02:13,595 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:02:13,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:02:13,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:02:13,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:02:13,598 INFO L87 Difference]: Start difference. First operand 202 states and 321 transitions. Second operand 3 states. [2020-12-22 08:02:13,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:02:13,744 INFO L93 Difference]: Finished difference Result 496 states and 805 transitions. [2020-12-22 08:02:13,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:02:13,745 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 52 [2020-12-22 08:02:13,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:02:13,749 INFO L225 Difference]: With dead ends: 496 [2020-12-22 08:02:13,749 INFO L226 Difference]: Without dead ends: 342 [2020-12-22 08:02:13,752 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:02:13,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2020-12-22 08:02:13,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 338. [2020-12-22 08:02:13,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 338 states. [2020-12-22 08:02:13,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 543 transitions. [2020-12-22 08:02:13,792 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 543 transitions. Word has length 52 [2020-12-22 08:02:13,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:02:13,793 INFO L481 AbstractCegarLoop]: Abstraction has 338 states and 543 transitions. [2020-12-22 08:02:13,793 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:02:13,793 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 543 transitions. [2020-12-22 08:02:13,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-12-22 08:02:13,797 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:02:13,797 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:02:13,797 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 08:02:13,798 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:02:13,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:02:13,799 INFO L82 PathProgramCache]: Analyzing trace with hash 329846722, now seen corresponding path program 1 times [2020-12-22 08:02:13,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:02:13,799 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601767483] [2020-12-22 08:02:13,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:02:13,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:02:13,940 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 08:02:13,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601767483] [2020-12-22 08:02:13,941 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:02:13,941 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:02:13,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189737850] [2020-12-22 08:02:13,942 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:02:13,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:02:13,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:02:13,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:02:13,944 INFO L87 Difference]: Start difference. First operand 338 states and 543 transitions. Second operand 3 states. [2020-12-22 08:02:14,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:02:14,021 INFO L93 Difference]: Finished difference Result 890 states and 1445 transitions. [2020-12-22 08:02:14,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:02:14,022 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 54 [2020-12-22 08:02:14,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:02:14,026 INFO L225 Difference]: With dead ends: 890 [2020-12-22 08:02:14,026 INFO L226 Difference]: Without dead ends: 600 [2020-12-22 08:02:14,029 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:02:14,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 600 states. [2020-12-22 08:02:14,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 600 to 594. [2020-12-22 08:02:14,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 594 states. [2020-12-22 08:02:14,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 594 states to 594 states and 955 transitions. [2020-12-22 08:02:14,079 INFO L78 Accepts]: Start accepts. Automaton has 594 states and 955 transitions. Word has length 54 [2020-12-22 08:02:14,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:02:14,079 INFO L481 AbstractCegarLoop]: Abstraction has 594 states and 955 transitions. [2020-12-22 08:02:14,079 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:02:14,080 INFO L276 IsEmpty]: Start isEmpty. Operand 594 states and 955 transitions. [2020-12-22 08:02:14,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-12-22 08:02:14,083 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:02:14,083 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:02:14,084 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 08:02:14,084 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:02:14,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:02:14,085 INFO L82 PathProgramCache]: Analyzing trace with hash 1296814383, now seen corresponding path program 1 times [2020-12-22 08:02:14,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:02:14,086 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424792156] [2020-12-22 08:02:14,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:02:14,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:02:14,336 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 08:02:14,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424792156] [2020-12-22 08:02:14,338 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:02:14,338 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:02:14,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457611160] [2020-12-22 08:02:14,339 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:02:14,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:02:14,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:02:14,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:02:14,345 INFO L87 Difference]: Start difference. First operand 594 states and 955 transitions. Second operand 5 states. [2020-12-22 08:02:14,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:02:14,785 INFO L93 Difference]: Finished difference Result 2292 states and 3764 transitions. [2020-12-22 08:02:14,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 08:02:14,787 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 56 [2020-12-22 08:02:14,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:02:14,799 INFO L225 Difference]: With dead ends: 2292 [2020-12-22 08:02:14,799 INFO L226 Difference]: Without dead ends: 1746 [2020-12-22 08:02:14,801 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-22 08:02:14,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1746 states. [2020-12-22 08:02:14,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1746 to 1071. [2020-12-22 08:02:14,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1071 states. [2020-12-22 08:02:14,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1071 states to 1071 states and 1733 transitions. [2020-12-22 08:02:14,903 INFO L78 Accepts]: Start accepts. Automaton has 1071 states and 1733 transitions. Word has length 56 [2020-12-22 08:02:14,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:02:14,905 INFO L481 AbstractCegarLoop]: Abstraction has 1071 states and 1733 transitions. [2020-12-22 08:02:14,905 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:02:14,905 INFO L276 IsEmpty]: Start isEmpty. Operand 1071 states and 1733 transitions. [2020-12-22 08:02:14,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-12-22 08:02:14,914 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:02:14,914 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:02:14,914 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 08:02:14,915 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:02:14,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:02:14,915 INFO L82 PathProgramCache]: Analyzing trace with hash 1484036003, now seen corresponding path program 1 times [2020-12-22 08:02:14,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:02:14,916 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434709438] [2020-12-22 08:02:14,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:02:14,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:02:15,004 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 08:02:15,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434709438] [2020-12-22 08:02:15,005 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:02:15,005 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:02:15,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459695782] [2020-12-22 08:02:15,006 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 08:02:15,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:02:15,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 08:02:15,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 08:02:15,007 INFO L87 Difference]: Start difference. First operand 1071 states and 1733 transitions. Second operand 4 states. [2020-12-22 08:02:15,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:02:15,290 INFO L93 Difference]: Finished difference Result 3136 states and 5140 transitions. [2020-12-22 08:02:15,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 08:02:15,292 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 57 [2020-12-22 08:02:15,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:02:15,306 INFO L225 Difference]: With dead ends: 3136 [2020-12-22 08:02:15,306 INFO L226 Difference]: Without dead ends: 2113 [2020-12-22 08:02:15,308 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:02:15,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2113 states. [2020-12-22 08:02:15,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2113 to 1583. [2020-12-22 08:02:15,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1583 states. [2020-12-22 08:02:15,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1583 states to 1583 states and 2574 transitions. [2020-12-22 08:02:15,459 INFO L78 Accepts]: Start accepts. Automaton has 1583 states and 2574 transitions. Word has length 57 [2020-12-22 08:02:15,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:02:15,460 INFO L481 AbstractCegarLoop]: Abstraction has 1583 states and 2574 transitions. [2020-12-22 08:02:15,460 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 08:02:15,460 INFO L276 IsEmpty]: Start isEmpty. Operand 1583 states and 2574 transitions. [2020-12-22 08:02:15,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-12-22 08:02:15,462 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:02:15,462 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:02:15,462 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 08:02:15,463 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:02:15,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:02:15,463 INFO L82 PathProgramCache]: Analyzing trace with hash -1297470346, now seen corresponding path program 1 times [2020-12-22 08:02:15,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:02:15,464 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298200971] [2020-12-22 08:02:15,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:02:15,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:02:15,580 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 08:02:15,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298200971] [2020-12-22 08:02:15,580 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:02:15,581 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:02:15,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334627917] [2020-12-22 08:02:15,582 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 08:02:15,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:02:15,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 08:02:15,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 08:02:15,584 INFO L87 Difference]: Start difference. First operand 1583 states and 2574 transitions. Second operand 4 states. [2020-12-22 08:02:15,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:02:15,960 INFO L93 Difference]: Finished difference Result 4604 states and 7538 transitions. [2020-12-22 08:02:15,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 08:02:15,961 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 58 [2020-12-22 08:02:15,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:02:15,982 INFO L225 Difference]: With dead ends: 4604 [2020-12-22 08:02:15,982 INFO L226 Difference]: Without dead ends: 3069 [2020-12-22 08:02:15,986 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:02:15,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3069 states. [2020-12-22 08:02:16,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3069 to 2314. [2020-12-22 08:02:16,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2314 states. [2020-12-22 08:02:16,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2314 states to 2314 states and 3761 transitions. [2020-12-22 08:02:16,219 INFO L78 Accepts]: Start accepts. Automaton has 2314 states and 3761 transitions. Word has length 58 [2020-12-22 08:02:16,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:02:16,220 INFO L481 AbstractCegarLoop]: Abstraction has 2314 states and 3761 transitions. [2020-12-22 08:02:16,220 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 08:02:16,220 INFO L276 IsEmpty]: Start isEmpty. Operand 2314 states and 3761 transitions. [2020-12-22 08:02:16,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-12-22 08:02:16,223 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:02:16,223 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:02:16,223 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 08:02:16,224 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:02:16,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:02:16,224 INFO L82 PathProgramCache]: Analyzing trace with hash -370820470, now seen corresponding path program 1 times [2020-12-22 08:02:16,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:02:16,225 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852347849] [2020-12-22 08:02:16,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:02:16,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:02:16,282 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 08:02:16,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852347849] [2020-12-22 08:02:16,283 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:02:16,283 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:02:16,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663813762] [2020-12-22 08:02:16,284 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:02:16,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:02:16,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:02:16,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:02:16,285 INFO L87 Difference]: Start difference. First operand 2314 states and 3761 transitions. Second operand 3 states. [2020-12-22 08:02:16,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:02:16,551 INFO L93 Difference]: Finished difference Result 5104 states and 8336 transitions. [2020-12-22 08:02:16,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:02:16,552 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 59 [2020-12-22 08:02:16,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:02:16,571 INFO L225 Difference]: With dead ends: 5104 [2020-12-22 08:02:16,572 INFO L226 Difference]: Without dead ends: 3495 [2020-12-22 08:02:16,579 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:02:16,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3495 states. [2020-12-22 08:02:16,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3495 to 3493. [2020-12-22 08:02:16,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3493 states. [2020-12-22 08:02:16,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3493 states to 3493 states and 5667 transitions. [2020-12-22 08:02:16,900 INFO L78 Accepts]: Start accepts. Automaton has 3493 states and 5667 transitions. Word has length 59 [2020-12-22 08:02:16,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:02:16,900 INFO L481 AbstractCegarLoop]: Abstraction has 3493 states and 5667 transitions. [2020-12-22 08:02:16,900 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:02:16,901 INFO L276 IsEmpty]: Start isEmpty. Operand 3493 states and 5667 transitions. [2020-12-22 08:02:16,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-12-22 08:02:16,903 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:02:16,903 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:02:16,903 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 08:02:16,904 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:02:16,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:02:16,904 INFO L82 PathProgramCache]: Analyzing trace with hash 1594203451, now seen corresponding path program 1 times [2020-12-22 08:02:16,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:02:16,905 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785482865] [2020-12-22 08:02:16,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:02:16,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:02:16,961 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 08:02:16,962 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785482865] [2020-12-22 08:02:16,962 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:02:16,962 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:02:16,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405705990] [2020-12-22 08:02:16,963 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:02:16,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:02:16,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:02:16,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:02:16,964 INFO L87 Difference]: Start difference. First operand 3493 states and 5667 transitions. Second operand 3 states. [2020-12-22 08:02:17,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:02:17,327 INFO L93 Difference]: Finished difference Result 6911 states and 11267 transitions. [2020-12-22 08:02:17,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:02:17,328 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 59 [2020-12-22 08:02:17,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:02:17,357 INFO L225 Difference]: With dead ends: 6911 [2020-12-22 08:02:17,357 INFO L226 Difference]: Without dead ends: 4911 [2020-12-22 08:02:17,364 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:02:17,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4911 states. [2020-12-22 08:02:17,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4911 to 4909. [2020-12-22 08:02:17,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4909 states. [2020-12-22 08:02:17,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4909 states to 4909 states and 7945 transitions. [2020-12-22 08:02:17,771 INFO L78 Accepts]: Start accepts. Automaton has 4909 states and 7945 transitions. Word has length 59 [2020-12-22 08:02:17,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:02:17,771 INFO L481 AbstractCegarLoop]: Abstraction has 4909 states and 7945 transitions. [2020-12-22 08:02:17,771 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:02:17,773 INFO L276 IsEmpty]: Start isEmpty. Operand 4909 states and 7945 transitions. [2020-12-22 08:02:17,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-12-22 08:02:17,774 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:02:17,774 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:02:17,775 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 08:02:17,775 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:02:17,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:02:17,776 INFO L82 PathProgramCache]: Analyzing trace with hash -1620263222, now seen corresponding path program 1 times [2020-12-22 08:02:17,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:02:17,778 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717481426] [2020-12-22 08:02:17,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:02:17,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:02:17,961 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 08:02:17,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717481426] [2020-12-22 08:02:17,967 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:02:17,967 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:02:17,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148061851] [2020-12-22 08:02:17,968 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 08:02:17,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:02:17,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 08:02:17,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 08:02:17,972 INFO L87 Difference]: Start difference. First operand 4909 states and 7945 transitions. Second operand 4 states. [2020-12-22 08:02:18,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:02:18,894 INFO L93 Difference]: Finished difference Result 15774 states and 25651 transitions. [2020-12-22 08:02:18,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 08:02:18,896 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 59 [2020-12-22 08:02:18,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:02:18,952 INFO L225 Difference]: With dead ends: 15774 [2020-12-22 08:02:18,952 INFO L226 Difference]: Without dead ends: 10993 [2020-12-22 08:02:18,963 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-12-22 08:02:18,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10993 states. [2020-12-22 08:02:19,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10993 to 7607. [2020-12-22 08:02:19,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7607 states. [2020-12-22 08:02:19,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7607 states to 7607 states and 12283 transitions. [2020-12-22 08:02:19,726 INFO L78 Accepts]: Start accepts. Automaton has 7607 states and 12283 transitions. Word has length 59 [2020-12-22 08:02:19,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:02:19,727 INFO L481 AbstractCegarLoop]: Abstraction has 7607 states and 12283 transitions. [2020-12-22 08:02:19,727 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 08:02:19,727 INFO L276 IsEmpty]: Start isEmpty. Operand 7607 states and 12283 transitions. [2020-12-22 08:02:19,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-12-22 08:02:19,728 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:02:19,728 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:02:19,728 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 08:02:19,728 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:02:19,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:02:19,729 INFO L82 PathProgramCache]: Analyzing trace with hash -515214271, now seen corresponding path program 1 times [2020-12-22 08:02:19,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:02:19,730 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92073810] [2020-12-22 08:02:19,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:02:19,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:02:19,776 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 08:02:19,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92073810] [2020-12-22 08:02:19,777 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:02:19,777 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:02:19,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037349434] [2020-12-22 08:02:19,778 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:02:19,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:02:19,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:02:19,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:02:19,779 INFO L87 Difference]: Start difference. First operand 7607 states and 12283 transitions. Second operand 3 states. [2020-12-22 08:02:20,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:02:20,700 INFO L93 Difference]: Finished difference Result 16681 states and 27278 transitions. [2020-12-22 08:02:20,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:02:20,702 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 59 [2020-12-22 08:02:20,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:02:20,737 INFO L225 Difference]: With dead ends: 16681 [2020-12-22 08:02:20,737 INFO L226 Difference]: Without dead ends: 11156 [2020-12-22 08:02:20,750 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:02:20,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11156 states. [2020-12-22 08:02:21,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11156 to 11154. [2020-12-22 08:02:21,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11154 states. [2020-12-22 08:02:21,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11154 states to 11154 states and 18059 transitions. [2020-12-22 08:02:21,652 INFO L78 Accepts]: Start accepts. Automaton has 11154 states and 18059 transitions. Word has length 59 [2020-12-22 08:02:21,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:02:21,652 INFO L481 AbstractCegarLoop]: Abstraction has 11154 states and 18059 transitions. [2020-12-22 08:02:21,652 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:02:21,652 INFO L276 IsEmpty]: Start isEmpty. Operand 11154 states and 18059 transitions. [2020-12-22 08:02:21,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-12-22 08:02:21,653 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:02:21,653 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:02:21,654 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 08:02:21,654 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:02:21,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:02:21,655 INFO L82 PathProgramCache]: Analyzing trace with hash 482860251, now seen corresponding path program 1 times [2020-12-22 08:02:21,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:02:21,655 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739719620] [2020-12-22 08:02:21,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:02:21,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:02:21,786 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 08:02:21,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739719620] [2020-12-22 08:02:21,787 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:02:21,787 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:02:21,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083419666] [2020-12-22 08:02:21,788 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 08:02:21,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:02:21,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 08:02:21,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 08:02:21,789 INFO L87 Difference]: Start difference. First operand 11154 states and 18059 transitions. Second operand 4 states. [2020-12-22 08:02:23,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:02:23,656 INFO L93 Difference]: Finished difference Result 32824 states and 53172 transitions. [2020-12-22 08:02:23,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 08:02:23,657 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 61 [2020-12-22 08:02:23,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:02:23,723 INFO L225 Difference]: With dead ends: 32824 [2020-12-22 08:02:23,723 INFO L226 Difference]: Without dead ends: 21679 [2020-12-22 08:02:23,746 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:02:23,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21679 states. [2020-12-22 08:02:25,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21679 to 21677. [2020-12-22 08:02:25,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21677 states. [2020-12-22 08:02:25,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21677 states to 21677 states and 34901 transitions. [2020-12-22 08:02:25,680 INFO L78 Accepts]: Start accepts. Automaton has 21677 states and 34901 transitions. Word has length 61 [2020-12-22 08:02:25,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:02:25,681 INFO L481 AbstractCegarLoop]: Abstraction has 21677 states and 34901 transitions. [2020-12-22 08:02:25,681 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 08:02:25,681 INFO L276 IsEmpty]: Start isEmpty. Operand 21677 states and 34901 transitions. [2020-12-22 08:02:25,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-12-22 08:02:25,682 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:02:25,682 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:02:25,682 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 08:02:25,682 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:02:25,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:02:25,683 INFO L82 PathProgramCache]: Analyzing trace with hash 749690503, now seen corresponding path program 1 times [2020-12-22 08:02:25,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:02:25,683 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180401005] [2020-12-22 08:02:25,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:02:25,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:02:25,718 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 08:02:25,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180401005] [2020-12-22 08:02:25,719 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:02:25,719 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:02:25,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93951076] [2020-12-22 08:02:25,720 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:02:25,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:02:25,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:02:25,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:02:25,721 INFO L87 Difference]: Start difference. First operand 21677 states and 34901 transitions. Second operand 3 states. [2020-12-22 08:02:28,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:02:28,214 INFO L93 Difference]: Finished difference Result 64993 states and 104641 transitions. [2020-12-22 08:02:28,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:02:28,215 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 62 [2020-12-22 08:02:28,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:02:28,336 INFO L225 Difference]: With dead ends: 64993 [2020-12-22 08:02:28,337 INFO L226 Difference]: Without dead ends: 43344 [2020-12-22 08:02:28,383 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:02:28,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43344 states. [2020-12-22 08:02:30,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43344 to 21679. [2020-12-22 08:02:30,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21679 states. [2020-12-22 08:02:30,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21679 states to 21679 states and 34903 transitions. [2020-12-22 08:02:30,050 INFO L78 Accepts]: Start accepts. Automaton has 21679 states and 34903 transitions. Word has length 62 [2020-12-22 08:02:30,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:02:30,050 INFO L481 AbstractCegarLoop]: Abstraction has 21679 states and 34903 transitions. [2020-12-22 08:02:30,050 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:02:30,051 INFO L276 IsEmpty]: Start isEmpty. Operand 21679 states and 34903 transitions. [2020-12-22 08:02:30,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-22 08:02:30,051 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:02:30,051 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:02:30,051 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 08:02:30,051 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:02:30,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:02:30,052 INFO L82 PathProgramCache]: Analyzing trace with hash 2144025067, now seen corresponding path program 1 times [2020-12-22 08:02:30,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:02:30,052 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232242673] [2020-12-22 08:02:30,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:02:30,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:02:30,113 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 08:02:30,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232242673] [2020-12-22 08:02:30,114 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:02:30,114 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:02:30,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426044972] [2020-12-22 08:02:30,115 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:02:30,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:02:30,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:02:30,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:02:30,116 INFO L87 Difference]: Start difference. First operand 21679 states and 34903 transitions. Second operand 3 states. [2020-12-22 08:02:33,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:02:33,068 INFO L93 Difference]: Finished difference Result 63647 states and 102554 transitions. [2020-12-22 08:02:33,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:02:33,069 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 63 [2020-12-22 08:02:33,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:02:33,160 INFO L225 Difference]: With dead ends: 63647 [2020-12-22 08:02:33,160 INFO L226 Difference]: Without dead ends: 42110 [2020-12-22 08:02:33,198 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:02:33,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42110 states. [2020-12-22 08:02:36,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42110 to 42108. [2020-12-22 08:02:36,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42108 states. [2020-12-22 08:02:36,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42108 states to 42108 states and 67397 transitions. [2020-12-22 08:02:36,361 INFO L78 Accepts]: Start accepts. Automaton has 42108 states and 67397 transitions. Word has length 63 [2020-12-22 08:02:36,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:02:36,361 INFO L481 AbstractCegarLoop]: Abstraction has 42108 states and 67397 transitions. [2020-12-22 08:02:36,361 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:02:36,361 INFO L276 IsEmpty]: Start isEmpty. Operand 42108 states and 67397 transitions. [2020-12-22 08:02:36,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-22 08:02:36,364 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:02:36,364 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:02:36,365 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 08:02:36,365 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:02:36,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:02:36,372 INFO L82 PathProgramCache]: Analyzing trace with hash -1309892562, now seen corresponding path program 1 times [2020-12-22 08:02:36,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:02:36,372 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179656397] [2020-12-22 08:02:36,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:02:36,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:02:36,568 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 08:02:36,568 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179656397] [2020-12-22 08:02:36,568 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:02:36,569 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:02:36,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307306445] [2020-12-22 08:02:36,569 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:02:36,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:02:36,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:02:36,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:02:36,571 INFO L87 Difference]: Start difference. First operand 42108 states and 67397 transitions. Second operand 5 states. [2020-12-22 08:02:42,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:02:42,454 INFO L93 Difference]: Finished difference Result 123662 states and 198032 transitions. [2020-12-22 08:02:42,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 08:02:42,455 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 63 [2020-12-22 08:02:42,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:02:42,605 INFO L225 Difference]: With dead ends: 123662 [2020-12-22 08:02:42,605 INFO L226 Difference]: Without dead ends: 81568 [2020-12-22 08:02:42,647 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:02:42,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81568 states. [2020-12-22 08:02:48,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81568 to 81566. [2020-12-22 08:02:48,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81566 states. [2020-12-22 08:02:48,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81566 states to 81566 states and 129753 transitions. [2020-12-22 08:02:48,490 INFO L78 Accepts]: Start accepts. Automaton has 81566 states and 129753 transitions. Word has length 63 [2020-12-22 08:02:48,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:02:48,491 INFO L481 AbstractCegarLoop]: Abstraction has 81566 states and 129753 transitions. [2020-12-22 08:02:48,491 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 08:02:48,491 INFO L276 IsEmpty]: Start isEmpty. Operand 81566 states and 129753 transitions. [2020-12-22 08:02:48,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-22 08:02:48,492 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:02:48,493 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:02:48,493 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-12-22 08:02:48,493 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:02:48,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:02:48,494 INFO L82 PathProgramCache]: Analyzing trace with hash 730213818, now seen corresponding path program 1 times [2020-12-22 08:02:48,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:02:48,494 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707010790] [2020-12-22 08:02:48,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:02:48,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:02:48,626 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 08:02:48,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707010790] [2020-12-22 08:02:48,627 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:02:48,627 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 08:02:48,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866978419] [2020-12-22 08:02:48,628 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 08:02:48,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:02:48,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 08:02:48,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 08:02:48,629 INFO L87 Difference]: Start difference. First operand 81566 states and 129753 transitions. Second operand 4 states. [2020-12-22 08:03:00,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:03:00,031 INFO L93 Difference]: Finished difference Result 239625 states and 381278 transitions. [2020-12-22 08:03:00,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 08:03:00,032 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 63 [2020-12-22 08:03:00,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:03:00,374 INFO L225 Difference]: With dead ends: 239625 [2020-12-22 08:03:00,374 INFO L226 Difference]: Without dead ends: 158115 [2020-12-22 08:03:00,465 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:03:00,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158115 states. [2020-12-22 08:03:12,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158115 to 158113. [2020-12-22 08:03:12,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158113 states. [2020-12-22 08:03:12,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158113 states to 158113 states and 249813 transitions. [2020-12-22 08:03:12,858 INFO L78 Accepts]: Start accepts. Automaton has 158113 states and 249813 transitions. Word has length 63 [2020-12-22 08:03:12,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:03:12,858 INFO L481 AbstractCegarLoop]: Abstraction has 158113 states and 249813 transitions. [2020-12-22 08:03:12,858 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 08:03:12,858 INFO L276 IsEmpty]: Start isEmpty. Operand 158113 states and 249813 transitions. [2020-12-22 08:03:12,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 08:03:12,861 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:03:12,861 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:03:12,861 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-12-22 08:03:12,861 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:03:12,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:03:12,862 INFO L82 PathProgramCache]: Analyzing trace with hash 1038687238, now seen corresponding path program 1 times [2020-12-22 08:03:12,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:03:12,862 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2071150836] [2020-12-22 08:03:12,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:03:12,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:03:12,898 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 08:03:12,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2071150836] [2020-12-22 08:03:12,899 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:03:12,899 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 08:03:12,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243307290] [2020-12-22 08:03:12,900 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 08:03:12,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:03:12,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 08:03:12,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:03:12,901 INFO L87 Difference]: Start difference. First operand 158113 states and 249813 transitions. Second operand 3 states. [2020-12-22 08:03:36,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 08:03:36,336 INFO L93 Difference]: Finished difference Result 474187 states and 749206 transitions. [2020-12-22 08:03:36,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 08:03:36,337 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 64 [2020-12-22 08:03:36,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 08:03:37,241 INFO L225 Difference]: With dead ends: 474187 [2020-12-22 08:03:37,241 INFO L226 Difference]: Without dead ends: 316165 [2020-12-22 08:03:37,440 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 08:03:37,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316165 states. [2020-12-22 08:03:51,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316165 to 158123. [2020-12-22 08:03:51,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158123 states. [2020-12-22 08:03:52,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158123 states to 158123 states and 249823 transitions. [2020-12-22 08:03:52,099 INFO L78 Accepts]: Start accepts. Automaton has 158123 states and 249823 transitions. Word has length 64 [2020-12-22 08:03:52,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 08:03:52,099 INFO L481 AbstractCegarLoop]: Abstraction has 158123 states and 249823 transitions. [2020-12-22 08:03:52,099 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 08:03:52,099 INFO L276 IsEmpty]: Start isEmpty. Operand 158123 states and 249823 transitions. [2020-12-22 08:03:52,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-22 08:03:52,101 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 08:03:52,101 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 08:03:52,101 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-12-22 08:03:52,102 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 08:03:52,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 08:03:52,102 INFO L82 PathProgramCache]: Analyzing trace with hash -1712489959, now seen corresponding path program 1 times [2020-12-22 08:03:52,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 08:03:52,103 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091402869] [2020-12-22 08:03:52,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 08:03:52,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 08:03:52,318 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 08:03:52,318 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091402869] [2020-12-22 08:03:52,319 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 08:03:52,319 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 08:03:52,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722243978] [2020-12-22 08:03:52,320 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 08:03:52,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 08:03:52,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 08:03:52,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 08:03:52,321 INFO L87 Difference]: Start difference. First operand 158123 states and 249823 transitions. Second operand 5 states.