/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/pals_lcr.3.1.ufo.BOUNDED-6.pals.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 07:31:19,975 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 07:31:19,978 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 07:31:20,014 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-12-22 07:31:20,027 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 07:31:20,029 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 07:31:20,030 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 07:31:20,031 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 07:31:20,032 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 07:31:20,034 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 07:31:20,036 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 07:31:20,038 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 07:31:20,040 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 07:31:20,042 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 07:31:20,043 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 07:31:20,044 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 07:31:20,048 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-12-22 07:31:20,075 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 07:31:20,107 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 07:31:20,107 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 07:31:20,111 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 07:31:20,112 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 07:31:20,113 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 07:31:20,113 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 07:31:20,113 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 07:31:20,113 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 07:31:20,114 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 07:31:20,114 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 07:31:20,114 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 07:31:20,114 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 07:31:20,115 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 07:31:20,115 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 07:31:20,115 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 07:31:20,115 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 07:31:20,116 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 07:31:20,117 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 07:31:20,117 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 07:31:20,117 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 07:31:20,118 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 07:31:20,118 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 07:31:20,118 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 07:31:20,119 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 07:31:20,119 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 07:31:20,119 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 07:31:20,523 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 07:31:20,562 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 07:31:20,566 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 07:31:20,568 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 07:31:20,568 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 07:31:20,569 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/seq-mthreaded/pals_lcr.3.1.ufo.BOUNDED-6.pals.c [2020-12-22 07:31:20,661 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8508d3749/e59c661b4e17414a88277d69caadcc88/FLAG0d94e4e08 [2020-12-22 07:31:21,239 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 07:31:21,240 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/seq-mthreaded/pals_lcr.3.1.ufo.BOUNDED-6.pals.c [2020-12-22 07:31:21,252 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8508d3749/e59c661b4e17414a88277d69caadcc88/FLAG0d94e4e08 [2020-12-22 07:31:21,588 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8508d3749/e59c661b4e17414a88277d69caadcc88 [2020-12-22 07:31:21,591 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 07:31:21,594 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 07:31:21,601 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 07:31:21,601 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 07:31:21,605 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 07:31:21,606 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:31:21" (1/1) ... [2020-12-22 07:31:21,607 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@76d2ae8d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:31:21, skipping insertion in model container [2020-12-22 07:31:21,608 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 07:31:21" (1/1) ... [2020-12-22 07:31:21,618 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 07:31:21,673 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 07:31:21,864 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/pals_lcr.3.1.ufo.BOUNDED-6.pals.c[5984,5997] [2020-12-22 07:31:21,868 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:31:21,880 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 07:31:21,927 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/pals_lcr.3.1.ufo.BOUNDED-6.pals.c[5984,5997] [2020-12-22 07:31:21,927 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 07:31:21,950 INFO L208 MainTranslator]: Completed translation [2020-12-22 07:31:21,951 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:31:21 WrapperNode [2020-12-22 07:31:21,951 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 07:31:21,953 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 07:31:21,953 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 07:31:21,953 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 07:31:21,962 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:31:21" (1/1) ... [2020-12-22 07:31:21,973 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:31:21" (1/1) ... [2020-12-22 07:31:22,003 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 07:31:22,004 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 07:31:22,004 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 07:31:22,004 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 07:31:22,014 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:31:21" (1/1) ... [2020-12-22 07:31:22,015 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:31:21" (1/1) ... [2020-12-22 07:31:22,018 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:31:21" (1/1) ... [2020-12-22 07:31:22,018 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:31:21" (1/1) ... [2020-12-22 07:31:22,024 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:31:21" (1/1) ... [2020-12-22 07:31:22,030 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:31:21" (1/1) ... [2020-12-22 07:31:22,033 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:31:21" (1/1) ... [2020-12-22 07:31:22,037 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 07:31:22,038 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 07:31:22,038 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 07:31:22,038 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 07:31:22,039 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:31:21" (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 07:31:22,159 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 07:31:22,160 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 07:31:22,160 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 07:31:22,161 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 07:31:23,011 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 07:31:23,011 INFO L299 CfgBuilder]: Removed 17 assume(true) statements. [2020-12-22 07:31:23,013 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:31:23 BoogieIcfgContainer [2020-12-22 07:31:23,013 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 07:31:23,015 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 07:31:23,015 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 07:31:23,019 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 07:31:23,020 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 07:31:21" (1/3) ... [2020-12-22 07:31:23,021 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40338ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:31:23, skipping insertion in model container [2020-12-22 07:31:23,021 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 07:31:21" (2/3) ... [2020-12-22 07:31:23,021 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40338ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 07:31:23, skipping insertion in model container [2020-12-22 07:31:23,022 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 07:31:23" (3/3) ... [2020-12-22 07:31:23,023 INFO L111 eAbstractionObserver]: Analyzing ICFG pals_lcr.3.1.ufo.BOUNDED-6.pals.c [2020-12-22 07:31:23,030 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 07:31:23,035 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 07:31:23,055 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-22 07:31:23,082 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 07:31:23,083 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 07:31:23,083 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 07:31:23,083 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 07:31:23,083 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 07:31:23,083 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 07:31:23,083 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 07:31:23,084 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 07:31:23,101 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states. [2020-12-22 07:31:23,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-22 07:31:23,108 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:31:23,109 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] [2020-12-22 07:31:23,110 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:31:23,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:31:23,117 INFO L82 PathProgramCache]: Analyzing trace with hash 1133243219, now seen corresponding path program 1 times [2020-12-22 07:31:23,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:31:23,128 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613420368] [2020-12-22 07:31:23,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:31:23,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:31:23,333 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 07:31:23,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613420368] [2020-12-22 07:31:23,335 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:31:23,335 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 07:31:23,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021814559] [2020-12-22 07:31:23,342 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-22 07:31:23,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:31:23,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-22 07:31:23,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 07:31:23,361 INFO L87 Difference]: Start difference. First operand 62 states. Second operand 2 states. [2020-12-22 07:31:23,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:31:23,389 INFO L93 Difference]: Finished difference Result 103 states and 164 transitions. [2020-12-22 07:31:23,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-22 07:31:23,390 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 25 [2020-12-22 07:31:23,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:31:23,402 INFO L225 Difference]: With dead ends: 103 [2020-12-22 07:31:23,403 INFO L226 Difference]: Without dead ends: 58 [2020-12-22 07:31:23,406 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-22 07:31:23,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-12-22 07:31:23,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2020-12-22 07:31:23,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-12-22 07:31:23,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 94 transitions. [2020-12-22 07:31:23,461 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 94 transitions. Word has length 25 [2020-12-22 07:31:23,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:31:23,462 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 94 transitions. [2020-12-22 07:31:23,462 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-22 07:31:23,462 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 94 transitions. [2020-12-22 07:31:23,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-22 07:31:23,464 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:31:23,464 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] [2020-12-22 07:31:23,464 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 07:31:23,464 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:31:23,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:31:23,466 INFO L82 PathProgramCache]: Analyzing trace with hash 315594769, now seen corresponding path program 1 times [2020-12-22 07:31:23,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:31:23,466 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166281370] [2020-12-22 07:31:23,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:31:23,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:31:23,585 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 07:31:23,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166281370] [2020-12-22 07:31:23,586 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:31:23,586 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:31:23,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231513583] [2020-12-22 07:31:23,588 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:31:23,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:31:23,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:31:23,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:31:23,590 INFO L87 Difference]: Start difference. First operand 58 states and 94 transitions. Second operand 5 states. [2020-12-22 07:31:23,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:31:23,765 INFO L93 Difference]: Finished difference Result 134 states and 210 transitions. [2020-12-22 07:31:23,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:31:23,766 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 25 [2020-12-22 07:31:23,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:31:23,768 INFO L225 Difference]: With dead ends: 134 [2020-12-22 07:31:23,768 INFO L226 Difference]: Without dead ends: 94 [2020-12-22 07:31:23,770 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:31:23,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-12-22 07:31:23,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 58. [2020-12-22 07:31:23,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-12-22 07:31:23,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 78 transitions. [2020-12-22 07:31:23,780 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 78 transitions. Word has length 25 [2020-12-22 07:31:23,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:31:23,780 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 78 transitions. [2020-12-22 07:31:23,780 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:31:23,780 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 78 transitions. [2020-12-22 07:31:23,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-12-22 07:31:23,782 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:31:23,782 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] [2020-12-22 07:31:23,783 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 07:31:23,783 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:31:23,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:31:23,784 INFO L82 PathProgramCache]: Analyzing trace with hash -278543826, now seen corresponding path program 1 times [2020-12-22 07:31:23,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:31:23,785 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166043258] [2020-12-22 07:31:23,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:31:23,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:31:23,900 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 07:31:23,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166043258] [2020-12-22 07:31:23,901 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:31:23,902 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:31:23,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371170263] [2020-12-22 07:31:23,903 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:31:23,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:31:23,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:31:23,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:31:23,904 INFO L87 Difference]: Start difference. First operand 58 states and 78 transitions. Second operand 3 states. [2020-12-22 07:31:23,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:31:23,947 INFO L93 Difference]: Finished difference Result 124 states and 180 transitions. [2020-12-22 07:31:23,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:31:23,948 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 40 [2020-12-22 07:31:23,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:31:23,950 INFO L225 Difference]: With dead ends: 124 [2020-12-22 07:31:23,950 INFO L226 Difference]: Without dead ends: 88 [2020-12-22 07:31:23,951 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 07:31:23,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-12-22 07:31:23,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 86. [2020-12-22 07:31:23,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-12-22 07:31:23,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 122 transitions. [2020-12-22 07:31:23,963 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 122 transitions. Word has length 40 [2020-12-22 07:31:23,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:31:23,964 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 122 transitions. [2020-12-22 07:31:23,964 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:31:23,964 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 122 transitions. [2020-12-22 07:31:23,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-12-22 07:31:23,966 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:31:23,966 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] [2020-12-22 07:31:23,966 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 07:31:23,966 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:31:23,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:31:23,967 INFO L82 PathProgramCache]: Analyzing trace with hash 1401070434, now seen corresponding path program 1 times [2020-12-22 07:31:23,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:31:23,968 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322780848] [2020-12-22 07:31:23,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:31:23,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:31:24,054 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 07:31:24,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322780848] [2020-12-22 07:31:24,055 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:31:24,055 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:31:24,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431890938] [2020-12-22 07:31:24,056 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:31:24,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:31:24,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:31:24,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:31:24,057 INFO L87 Difference]: Start difference. First operand 86 states and 122 transitions. Second operand 3 states. [2020-12-22 07:31:24,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:31:24,097 INFO L93 Difference]: Finished difference Result 202 states and 302 transitions. [2020-12-22 07:31:24,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:31:24,098 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 40 [2020-12-22 07:31:24,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:31:24,103 INFO L225 Difference]: With dead ends: 202 [2020-12-22 07:31:24,104 INFO L226 Difference]: Without dead ends: 138 [2020-12-22 07:31:24,107 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 07:31:24,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-12-22 07:31:24,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 136. [2020-12-22 07:31:24,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-12-22 07:31:24,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 199 transitions. [2020-12-22 07:31:24,142 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 199 transitions. Word has length 40 [2020-12-22 07:31:24,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:31:24,143 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 199 transitions. [2020-12-22 07:31:24,146 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:31:24,146 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 199 transitions. [2020-12-22 07:31:24,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-12-22 07:31:24,148 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:31:24,148 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] [2020-12-22 07:31:24,149 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 07:31:24,149 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:31:24,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:31:24,150 INFO L82 PathProgramCache]: Analyzing trace with hash 1738863576, now seen corresponding path program 1 times [2020-12-22 07:31:24,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:31:24,151 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340726873] [2020-12-22 07:31:24,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:31:24,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:31:24,295 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 07:31:24,295 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340726873] [2020-12-22 07:31:24,296 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:31:24,296 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:31:24,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097600929] [2020-12-22 07:31:24,297 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:31:24,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:31:24,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:31:24,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:31:24,299 INFO L87 Difference]: Start difference. First operand 136 states and 199 transitions. Second operand 3 states. [2020-12-22 07:31:24,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:31:24,383 INFO L93 Difference]: Finished difference Result 340 states and 513 transitions. [2020-12-22 07:31:24,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:31:24,384 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 40 [2020-12-22 07:31:24,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:31:24,389 INFO L225 Difference]: With dead ends: 340 [2020-12-22 07:31:24,390 INFO L226 Difference]: Without dead ends: 226 [2020-12-22 07:31:24,392 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 07:31:24,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2020-12-22 07:31:24,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 224. [2020-12-22 07:31:24,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 224 states. [2020-12-22 07:31:24,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 331 transitions. [2020-12-22 07:31:24,418 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 331 transitions. Word has length 40 [2020-12-22 07:31:24,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:31:24,419 INFO L481 AbstractCegarLoop]: Abstraction has 224 states and 331 transitions. [2020-12-22 07:31:24,419 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:31:24,419 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 331 transitions. [2020-12-22 07:31:24,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-12-22 07:31:24,420 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:31:24,420 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] [2020-12-22 07:31:24,421 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 07:31:24,421 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:31:24,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:31:24,422 INFO L82 PathProgramCache]: Analyzing trace with hash -1338118322, now seen corresponding path program 1 times [2020-12-22 07:31:24,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:31:24,422 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033558749] [2020-12-22 07:31:24,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:31:24,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:31:24,552 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 07:31:24,553 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033558749] [2020-12-22 07:31:24,555 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:31:24,555 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:31:24,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308196873] [2020-12-22 07:31:24,556 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 07:31:24,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:31:24,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 07:31:24,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 07:31:24,558 INFO L87 Difference]: Start difference. First operand 224 states and 331 transitions. Second operand 6 states. [2020-12-22 07:31:24,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:31:24,815 INFO L93 Difference]: Finished difference Result 676 states and 1017 transitions. [2020-12-22 07:31:24,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:31:24,816 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 40 [2020-12-22 07:31:24,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:31:24,819 INFO L225 Difference]: With dead ends: 676 [2020-12-22 07:31:24,819 INFO L226 Difference]: Without dead ends: 474 [2020-12-22 07:31:24,821 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 07:31:24,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2020-12-22 07:31:24,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 424. [2020-12-22 07:31:24,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 424 states. [2020-12-22 07:31:24,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 635 transitions. [2020-12-22 07:31:24,861 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 635 transitions. Word has length 40 [2020-12-22 07:31:24,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:31:24,862 INFO L481 AbstractCegarLoop]: Abstraction has 424 states and 635 transitions. [2020-12-22 07:31:24,862 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 07:31:24,862 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 635 transitions. [2020-12-22 07:31:24,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-12-22 07:31:24,863 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:31:24,863 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] [2020-12-22 07:31:24,863 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 07:31:24,864 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:31:24,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:31:24,864 INFO L82 PathProgramCache]: Analyzing trace with hash -317049968, now seen corresponding path program 1 times [2020-12-22 07:31:24,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:31:24,865 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921304239] [2020-12-22 07:31:24,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:31:24,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:31:24,962 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 07:31:24,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921304239] [2020-12-22 07:31:24,963 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:31:24,964 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:31:24,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669406489] [2020-12-22 07:31:24,965 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:31:24,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:31:24,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:31:24,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:31:24,967 INFO L87 Difference]: Start difference. First operand 424 states and 635 transitions. Second operand 5 states. [2020-12-22 07:31:25,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:31:25,347 INFO L93 Difference]: Finished difference Result 2434 states and 3700 transitions. [2020-12-22 07:31:25,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:31:25,348 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 40 [2020-12-22 07:31:25,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:31:25,359 INFO L225 Difference]: With dead ends: 2434 [2020-12-22 07:31:25,360 INFO L226 Difference]: Without dead ends: 2032 [2020-12-22 07:31:25,392 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 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 07:31:25,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2032 states. [2020-12-22 07:31:25,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2032 to 824. [2020-12-22 07:31:25,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 824 states. [2020-12-22 07:31:25,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 824 states to 824 states and 1215 transitions. [2020-12-22 07:31:25,469 INFO L78 Accepts]: Start accepts. Automaton has 824 states and 1215 transitions. Word has length 40 [2020-12-22 07:31:25,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:31:25,471 INFO L481 AbstractCegarLoop]: Abstraction has 824 states and 1215 transitions. [2020-12-22 07:31:25,471 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:31:25,471 INFO L276 IsEmpty]: Start isEmpty. Operand 824 states and 1215 transitions. [2020-12-22 07:31:25,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-12-22 07:31:25,477 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:31:25,478 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] [2020-12-22 07:31:25,478 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 07:31:25,479 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:31:25,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:31:25,479 INFO L82 PathProgramCache]: Analyzing trace with hash -1091548472, now seen corresponding path program 1 times [2020-12-22 07:31:25,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:31:25,480 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759045177] [2020-12-22 07:31:25,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:31:25,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:31:25,719 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 07:31:25,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759045177] [2020-12-22 07:31:25,720 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:31:25,721 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:31:25,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451874380] [2020-12-22 07:31:25,722 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:31:25,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:31:25,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:31:25,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:31:25,724 INFO L87 Difference]: Start difference. First operand 824 states and 1215 transitions. Second operand 5 states. [2020-12-22 07:31:25,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:31:25,900 INFO L93 Difference]: Finished difference Result 2030 states and 3022 transitions. [2020-12-22 07:31:25,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 07:31:25,901 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 42 [2020-12-22 07:31:25,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:31:25,908 INFO L225 Difference]: With dead ends: 2030 [2020-12-22 07:31:25,909 INFO L226 Difference]: Without dead ends: 1228 [2020-12-22 07:31:25,911 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:31:25,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1228 states. [2020-12-22 07:31:25,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1228 to 824. [2020-12-22 07:31:25,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 824 states. [2020-12-22 07:31:25,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 824 states to 824 states and 1199 transitions. [2020-12-22 07:31:25,997 INFO L78 Accepts]: Start accepts. Automaton has 824 states and 1199 transitions. Word has length 42 [2020-12-22 07:31:25,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:31:25,997 INFO L481 AbstractCegarLoop]: Abstraction has 824 states and 1199 transitions. [2020-12-22 07:31:25,998 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:31:25,999 INFO L276 IsEmpty]: Start isEmpty. Operand 824 states and 1199 transitions. [2020-12-22 07:31:26,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-12-22 07:31:26,001 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:31:26,001 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] [2020-12-22 07:31:26,001 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 07:31:26,001 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:31:26,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:31:26,002 INFO L82 PathProgramCache]: Analyzing trace with hash -1158041984, now seen corresponding path program 1 times [2020-12-22 07:31:26,002 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:31:26,003 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352116878] [2020-12-22 07:31:26,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:31:26,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:31:26,074 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 07:31:26,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352116878] [2020-12-22 07:31:26,076 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:31:26,076 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:31:26,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38398939] [2020-12-22 07:31:26,076 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:31:26,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:31:26,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:31:26,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:31:26,078 INFO L87 Difference]: Start difference. First operand 824 states and 1199 transitions. Second operand 3 states. [2020-12-22 07:31:26,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:31:26,189 INFO L93 Difference]: Finished difference Result 1810 states and 2635 transitions. [2020-12-22 07:31:26,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:31:26,190 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 42 [2020-12-22 07:31:26,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:31:26,196 INFO L225 Difference]: With dead ends: 1810 [2020-12-22 07:31:26,196 INFO L226 Difference]: Without dead ends: 1008 [2020-12-22 07:31:26,197 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 07:31:26,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1008 states. [2020-12-22 07:31:26,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1008 to 1006. [2020-12-22 07:31:26,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1006 states. [2020-12-22 07:31:26,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1006 states to 1006 states and 1445 transitions. [2020-12-22 07:31:26,281 INFO L78 Accepts]: Start accepts. Automaton has 1006 states and 1445 transitions. Word has length 42 [2020-12-22 07:31:26,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:31:26,281 INFO L481 AbstractCegarLoop]: Abstraction has 1006 states and 1445 transitions. [2020-12-22 07:31:26,281 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:31:26,282 INFO L276 IsEmpty]: Start isEmpty. Operand 1006 states and 1445 transitions. [2020-12-22 07:31:26,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-12-22 07:31:26,282 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:31:26,282 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] [2020-12-22 07:31:26,283 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 07:31:26,283 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:31:26,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:31:26,283 INFO L82 PathProgramCache]: Analyzing trace with hash 107012533, now seen corresponding path program 1 times [2020-12-22 07:31:26,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:31:26,284 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343760344] [2020-12-22 07:31:26,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:31:26,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:31:26,358 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 07:31:26,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343760344] [2020-12-22 07:31:26,359 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:31:26,359 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:31:26,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693974827] [2020-12-22 07:31:26,360 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:31:26,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:31:26,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:31:26,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:31:26,361 INFO L87 Difference]: Start difference. First operand 1006 states and 1445 transitions. Second operand 5 states. [2020-12-22 07:31:26,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:31:26,567 INFO L93 Difference]: Finished difference Result 1993 states and 2820 transitions. [2020-12-22 07:31:26,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 07:31:26,568 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 43 [2020-12-22 07:31:26,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:31:26,578 INFO L225 Difference]: With dead ends: 1993 [2020-12-22 07:31:26,578 INFO L226 Difference]: Without dead ends: 1991 [2020-12-22 07:31:26,579 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-22 07:31:26,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1991 states. [2020-12-22 07:31:26,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1991 to 1102. [2020-12-22 07:31:26,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1102 states. [2020-12-22 07:31:26,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1102 states to 1102 states and 1537 transitions. [2020-12-22 07:31:26,708 INFO L78 Accepts]: Start accepts. Automaton has 1102 states and 1537 transitions. Word has length 43 [2020-12-22 07:31:26,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:31:26,709 INFO L481 AbstractCegarLoop]: Abstraction has 1102 states and 1537 transitions. [2020-12-22 07:31:26,709 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:31:26,709 INFO L276 IsEmpty]: Start isEmpty. Operand 1102 states and 1537 transitions. [2020-12-22 07:31:26,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-22 07:31:26,710 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:31:26,710 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:31:26,711 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 07:31:26,711 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:31:26,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:31:26,712 INFO L82 PathProgramCache]: Analyzing trace with hash -1027002802, now seen corresponding path program 1 times [2020-12-22 07:31:26,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:31:26,712 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057897819] [2020-12-22 07:31:26,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:31:26,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:31:26,792 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-22 07:31:26,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057897819] [2020-12-22 07:31:26,793 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:31:26,793 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:31:26,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121132314] [2020-12-22 07:31:26,794 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:31:26,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:31:26,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:31:26,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:31:26,795 INFO L87 Difference]: Start difference. First operand 1102 states and 1537 transitions. Second operand 5 states. [2020-12-22 07:31:27,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:31:27,177 INFO L93 Difference]: Finished difference Result 4698 states and 6565 transitions. [2020-12-22 07:31:27,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 07:31:27,178 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 63 [2020-12-22 07:31:27,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:31:27,195 INFO L225 Difference]: With dead ends: 4698 [2020-12-22 07:31:27,196 INFO L226 Difference]: Without dead ends: 3620 [2020-12-22 07:31:27,198 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:31:27,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3620 states. [2020-12-22 07:31:27,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3620 to 2178. [2020-12-22 07:31:27,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2178 states. [2020-12-22 07:31:27,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2178 states to 2178 states and 3029 transitions. [2020-12-22 07:31:27,420 INFO L78 Accepts]: Start accepts. Automaton has 2178 states and 3029 transitions. Word has length 63 [2020-12-22 07:31:27,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:31:27,420 INFO L481 AbstractCegarLoop]: Abstraction has 2178 states and 3029 transitions. [2020-12-22 07:31:27,420 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:31:27,420 INFO L276 IsEmpty]: Start isEmpty. Operand 2178 states and 3029 transitions. [2020-12-22 07:31:27,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-22 07:31:27,422 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:31:27,422 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:31:27,423 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 07:31:27,423 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:31:27,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:31:27,424 INFO L82 PathProgramCache]: Analyzing trace with hash 1499181678, now seen corresponding path program 1 times [2020-12-22 07:31:27,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:31:27,424 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226475927] [2020-12-22 07:31:27,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:31:27,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:31:27,520 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-12-22 07:31:27,521 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226475927] [2020-12-22 07:31:27,521 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:31:27,521 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:31:27,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63982248] [2020-12-22 07:31:27,522 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:31:27,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:31:27,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:31:27,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:31:27,523 INFO L87 Difference]: Start difference. First operand 2178 states and 3029 transitions. Second operand 5 states. [2020-12-22 07:31:27,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:31:27,922 INFO L93 Difference]: Finished difference Result 5774 states and 8057 transitions. [2020-12-22 07:31:27,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 07:31:27,924 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 63 [2020-12-22 07:31:27,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:31:27,948 INFO L225 Difference]: With dead ends: 5774 [2020-12-22 07:31:27,948 INFO L226 Difference]: Without dead ends: 4696 [2020-12-22 07:31:27,951 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:31:27,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4696 states. [2020-12-22 07:31:28,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4696 to 3794. [2020-12-22 07:31:28,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3794 states. [2020-12-22 07:31:28,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3794 states to 3794 states and 5249 transitions. [2020-12-22 07:31:28,293 INFO L78 Accepts]: Start accepts. Automaton has 3794 states and 5249 transitions. Word has length 63 [2020-12-22 07:31:28,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:31:28,294 INFO L481 AbstractCegarLoop]: Abstraction has 3794 states and 5249 transitions. [2020-12-22 07:31:28,294 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:31:28,294 INFO L276 IsEmpty]: Start isEmpty. Operand 3794 states and 5249 transitions. [2020-12-22 07:31:28,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-22 07:31:28,295 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:31:28,296 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:31:28,296 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-12-22 07:31:28,296 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:31:28,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:31:28,297 INFO L82 PathProgramCache]: Analyzing trace with hash -1664145778, now seen corresponding path program 1 times [2020-12-22 07:31:28,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:31:28,297 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024483680] [2020-12-22 07:31:28,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:31:28,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:31:28,372 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 07:31:28,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024483680] [2020-12-22 07:31:28,373 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:31:28,373 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:31:28,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652445908] [2020-12-22 07:31:28,373 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:31:28,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:31:28,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:31:28,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:31:28,375 INFO L87 Difference]: Start difference. First operand 3794 states and 5249 transitions. Second operand 5 states. [2020-12-22 07:31:28,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:31:28,865 INFO L93 Difference]: Finished difference Result 6670 states and 9309 transitions. [2020-12-22 07:31:28,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 07:31:28,866 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 63 [2020-12-22 07:31:28,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:31:28,894 INFO L225 Difference]: With dead ends: 6670 [2020-12-22 07:31:28,894 INFO L226 Difference]: Without dead ends: 5772 [2020-12-22 07:31:28,904 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:31:28,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5772 states. [2020-12-22 07:31:29,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5772 to 4690. [2020-12-22 07:31:29,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4690 states. [2020-12-22 07:31:29,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4690 states to 4690 states and 6505 transitions. [2020-12-22 07:31:29,347 INFO L78 Accepts]: Start accepts. Automaton has 4690 states and 6505 transitions. Word has length 63 [2020-12-22 07:31:29,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:31:29,347 INFO L481 AbstractCegarLoop]: Abstraction has 4690 states and 6505 transitions. [2020-12-22 07:31:29,348 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:31:29,348 INFO L276 IsEmpty]: Start isEmpty. Operand 4690 states and 6505 transitions. [2020-12-22 07:31:29,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-12-22 07:31:29,350 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:31:29,350 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:31:29,350 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-12-22 07:31:29,351 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:31:29,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:31:29,351 INFO L82 PathProgramCache]: Analyzing trace with hash -229876224, now seen corresponding path program 1 times [2020-12-22 07:31:29,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:31:29,352 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887085435] [2020-12-22 07:31:29,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:31:29,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:31:29,448 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 07:31:29,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887085435] [2020-12-22 07:31:29,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563978204] [2020-12-22 07:31:29,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 07:31:29,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:31:29,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 313 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-22 07:31:29,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 07:31:29,787 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-22 07:31:29,787 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 07:31:29,788 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6] total 7 [2020-12-22 07:31:29,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744599423] [2020-12-22 07:31:29,789 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 07:31:29,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:31:29,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 07:31:29,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:31:29,791 INFO L87 Difference]: Start difference. First operand 4690 states and 6505 transitions. Second operand 7 states. [2020-12-22 07:31:30,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:31:30,552 INFO L93 Difference]: Finished difference Result 11621 states and 16185 transitions. [2020-12-22 07:31:30,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:31:30,553 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 64 [2020-12-22 07:31:30,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:31:30,587 INFO L225 Difference]: With dead ends: 11621 [2020-12-22 07:31:30,587 INFO L226 Difference]: Without dead ends: 7587 [2020-12-22 07:31:30,594 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2020-12-22 07:31:30,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7587 states. [2020-12-22 07:31:31,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7587 to 7538. [2020-12-22 07:31:31,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7538 states. [2020-12-22 07:31:31,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7538 states to 7538 states and 10277 transitions. [2020-12-22 07:31:31,202 INFO L78 Accepts]: Start accepts. Automaton has 7538 states and 10277 transitions. Word has length 64 [2020-12-22 07:31:31,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:31:31,202 INFO L481 AbstractCegarLoop]: Abstraction has 7538 states and 10277 transitions. [2020-12-22 07:31:31,202 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 07:31:31,202 INFO L276 IsEmpty]: Start isEmpty. Operand 7538 states and 10277 transitions. [2020-12-22 07:31:31,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-22 07:31:31,204 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:31:31,204 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:31:31,418 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-22 07:31:31,419 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:31:31,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:31:31,420 INFO L82 PathProgramCache]: Analyzing trace with hash -456421882, now seen corresponding path program 1 times [2020-12-22 07:31:31,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:31:31,421 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994409510] [2020-12-22 07:31:31,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:31:31,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:31:31,714 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:31:31,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994409510] [2020-12-22 07:31:31,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418980455] [2020-12-22 07:31:31,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 07:31:31,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:31:31,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 07:31:31,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 07:31:32,014 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 07:31:32,372 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:31:32,373 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 07:31:32,373 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-12-22 07:31:32,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127540912] [2020-12-22 07:31:32,374 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 07:31:32,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:31:32,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 07:31:32,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2020-12-22 07:31:32,375 INFO L87 Difference]: Start difference. First operand 7538 states and 10277 transitions. Second operand 17 states. [2020-12-22 07:31:35,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:31:35,385 INFO L93 Difference]: Finished difference Result 24813 states and 33558 transitions. [2020-12-22 07:31:35,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-22 07:31:35,386 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 65 [2020-12-22 07:31:35,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:31:35,432 INFO L225 Difference]: With dead ends: 24813 [2020-12-22 07:31:35,432 INFO L226 Difference]: Without dead ends: 17299 [2020-12-22 07:31:35,447 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=434, Invalid=1206, Unknown=0, NotChecked=0, Total=1640 [2020-12-22 07:31:35,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17299 states. [2020-12-22 07:31:36,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17299 to 11114. [2020-12-22 07:31:36,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11114 states. [2020-12-22 07:31:36,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11114 states to 11114 states and 15005 transitions. [2020-12-22 07:31:36,590 INFO L78 Accepts]: Start accepts. Automaton has 11114 states and 15005 transitions. Word has length 65 [2020-12-22 07:31:36,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:31:36,590 INFO L481 AbstractCegarLoop]: Abstraction has 11114 states and 15005 transitions. [2020-12-22 07:31:36,591 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 07:31:36,591 INFO L276 IsEmpty]: Start isEmpty. Operand 11114 states and 15005 transitions. [2020-12-22 07:31:36,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-22 07:31:36,592 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:31:36,593 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:31:36,807 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-22 07:31:36,807 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:31:36,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:31:36,808 INFO L82 PathProgramCache]: Analyzing trace with hash 550341158, now seen corresponding path program 1 times [2020-12-22 07:31:36,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:31:36,808 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256467474] [2020-12-22 07:31:36,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:31:36,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:31:37,064 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:31:37,065 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256467474] [2020-12-22 07:31:37,065 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496480048] [2020-12-22 07:31:37,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 07:31:37,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:31:37,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-22 07:31:37,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 07:31:37,355 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 07:31:37,713 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:31:37,713 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 07:31:37,714 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2020-12-22 07:31:37,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56382659] [2020-12-22 07:31:37,714 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 07:31:37,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:31:37,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 07:31:37,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2020-12-22 07:31:37,716 INFO L87 Difference]: Start difference. First operand 11114 states and 15005 transitions. Second operand 17 states. [2020-12-22 07:31:38,494 WARN L197 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 44 [2020-12-22 07:31:40,855 WARN L197 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 59 [2020-12-22 07:31:41,294 WARN L197 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 56 [2020-12-22 07:31:42,105 WARN L197 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 59 [2020-12-22 07:31:46,127 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2020-12-22 07:31:56,815 WARN L197 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 54 [2020-12-22 07:31:58,279 WARN L197 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 57 [2020-12-22 07:31:58,731 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 45 [2020-12-22 07:32:00,182 WARN L197 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2020-12-22 07:32:04,592 WARN L197 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 45 [2020-12-22 07:32:05,050 WARN L197 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 57 [2020-12-22 07:32:09,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:32:09,971 INFO L93 Difference]: Finished difference Result 208295 states and 278042 transitions. [2020-12-22 07:32:09,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 205 states. [2020-12-22 07:32:09,972 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 65 [2020-12-22 07:32:09,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:32:10,608 INFO L225 Difference]: With dead ends: 208295 [2020-12-22 07:32:10,609 INFO L226 Difference]: Without dead ends: 197205 [2020-12-22 07:32:10,929 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 217 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20542 ImplicationChecksByTransitivity, 14.7s TimeCoverageRelationStatistics Valid=5056, Invalid=42686, Unknown=0, NotChecked=0, Total=47742 [2020-12-22 07:32:11,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197205 states. [2020-12-22 07:32:18,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197205 to 58813. [2020-12-22 07:32:18,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58813 states. [2020-12-22 07:32:18,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58813 states to 58813 states and 79207 transitions. [2020-12-22 07:32:18,439 INFO L78 Accepts]: Start accepts. Automaton has 58813 states and 79207 transitions. Word has length 65 [2020-12-22 07:32:18,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:32:18,439 INFO L481 AbstractCegarLoop]: Abstraction has 58813 states and 79207 transitions. [2020-12-22 07:32:18,439 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 07:32:18,440 INFO L276 IsEmpty]: Start isEmpty. Operand 58813 states and 79207 transitions. [2020-12-22 07:32:18,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-22 07:32:18,444 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:32:18,444 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:32:18,654 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-22 07:32:18,655 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:32:18,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:32:18,656 INFO L82 PathProgramCache]: Analyzing trace with hash 625513838, now seen corresponding path program 1 times [2020-12-22 07:32:18,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:32:18,657 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007428801] [2020-12-22 07:32:18,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:32:18,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:32:18,714 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:32:18,716 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007428801] [2020-12-22 07:32:18,717 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:32:18,717 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:32:18,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833208460] [2020-12-22 07:32:18,718 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:32:18,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:32:18,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:32:18,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:32:18,719 INFO L87 Difference]: Start difference. First operand 58813 states and 79207 transitions. Second operand 3 states. [2020-12-22 07:32:23,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:32:23,582 INFO L93 Difference]: Finished difference Result 117604 states and 158391 transitions. [2020-12-22 07:32:23,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:32:23,582 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 65 [2020-12-22 07:32:23,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:32:23,689 INFO L225 Difference]: With dead ends: 117604 [2020-12-22 07:32:23,689 INFO L226 Difference]: Without dead ends: 58815 [2020-12-22 07:32:23,790 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 07:32:23,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58815 states. [2020-12-22 07:32:29,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58815 to 57541. [2020-12-22 07:32:29,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57541 states. [2020-12-22 07:32:29,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57541 states to 57541 states and 76027 transitions. [2020-12-22 07:32:29,246 INFO L78 Accepts]: Start accepts. Automaton has 57541 states and 76027 transitions. Word has length 65 [2020-12-22 07:32:29,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:32:29,247 INFO L481 AbstractCegarLoop]: Abstraction has 57541 states and 76027 transitions. [2020-12-22 07:32:29,247 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:32:29,247 INFO L276 IsEmpty]: Start isEmpty. Operand 57541 states and 76027 transitions. [2020-12-22 07:32:29,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-22 07:32:29,250 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:32:29,250 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:32:29,250 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-12-22 07:32:29,250 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:32:29,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:32:29,251 INFO L82 PathProgramCache]: Analyzing trace with hash -621993778, now seen corresponding path program 1 times [2020-12-22 07:32:29,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:32:29,251 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275074418] [2020-12-22 07:32:29,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:32:29,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:32:29,299 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:32:29,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275074418] [2020-12-22 07:32:29,300 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:32:29,300 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:32:29,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686002374] [2020-12-22 07:32:29,300 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:32:29,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:32:29,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:32:29,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:32:29,301 INFO L87 Difference]: Start difference. First operand 57541 states and 76027 transitions. Second operand 3 states. [2020-12-22 07:32:32,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:32:32,013 INFO L93 Difference]: Finished difference Result 89986 states and 118783 transitions. [2020-12-22 07:32:32,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:32:32,019 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 65 [2020-12-22 07:32:32,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:32:32,070 INFO L225 Difference]: With dead ends: 89986 [2020-12-22 07:32:32,070 INFO L226 Difference]: Without dead ends: 32469 [2020-12-22 07:32:32,105 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 07:32:32,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32469 states. [2020-12-22 07:32:35,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32469 to 32467. [2020-12-22 07:32:35,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32467 states. [2020-12-22 07:32:35,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32467 states to 32467 states and 41927 transitions. [2020-12-22 07:32:35,158 INFO L78 Accepts]: Start accepts. Automaton has 32467 states and 41927 transitions. Word has length 65 [2020-12-22 07:32:35,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:32:35,158 INFO L481 AbstractCegarLoop]: Abstraction has 32467 states and 41927 transitions. [2020-12-22 07:32:35,158 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:32:35,158 INFO L276 IsEmpty]: Start isEmpty. Operand 32467 states and 41927 transitions. [2020-12-22 07:32:35,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-22 07:32:35,160 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:32:35,161 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:32:35,161 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-12-22 07:32:35,161 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:32:35,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:32:35,162 INFO L82 PathProgramCache]: Analyzing trace with hash -1642879954, now seen corresponding path program 1 times [2020-12-22 07:32:35,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:32:35,162 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108807720] [2020-12-22 07:32:35,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:32:35,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:32:35,200 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:32:35,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108807720] [2020-12-22 07:32:35,201 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:32:35,201 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 07:32:35,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509830851] [2020-12-22 07:32:35,201 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-22 07:32:35,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:32:35,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-22 07:32:35,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-22 07:32:35,202 INFO L87 Difference]: Start difference. First operand 32467 states and 41927 transitions. Second operand 3 states. [2020-12-22 07:32:36,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:32:36,434 INFO L93 Difference]: Finished difference Result 45562 states and 58892 transitions. [2020-12-22 07:32:36,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-22 07:32:36,439 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 65 [2020-12-22 07:32:36,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:32:36,454 INFO L225 Difference]: With dead ends: 45562 [2020-12-22 07:32:36,454 INFO L226 Difference]: Without dead ends: 13119 [2020-12-22 07:32:36,471 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 07:32:36,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13119 states. [2020-12-22 07:32:37,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13119 to 12223. [2020-12-22 07:32:37,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12223 states. [2020-12-22 07:32:37,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12223 states to 12223 states and 15637 transitions. [2020-12-22 07:32:37,699 INFO L78 Accepts]: Start accepts. Automaton has 12223 states and 15637 transitions. Word has length 65 [2020-12-22 07:32:37,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:32:37,699 INFO L481 AbstractCegarLoop]: Abstraction has 12223 states and 15637 transitions. [2020-12-22 07:32:37,699 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-22 07:32:37,700 INFO L276 IsEmpty]: Start isEmpty. Operand 12223 states and 15637 transitions. [2020-12-22 07:32:37,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-22 07:32:37,701 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:32:37,701 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:32:37,701 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-12-22 07:32:37,701 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:32:37,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:32:37,702 INFO L82 PathProgramCache]: Analyzing trace with hash 224764346, now seen corresponding path program 1 times [2020-12-22 07:32:37,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:32:37,702 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603171849] [2020-12-22 07:32:37,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:32:37,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:32:37,796 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-12-22 07:32:37,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603171849] [2020-12-22 07:32:37,797 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:32:37,797 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:32:37,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107123778] [2020-12-22 07:32:37,798 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 07:32:37,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:32:37,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 07:32:37,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 07:32:37,799 INFO L87 Difference]: Start difference. First operand 12223 states and 15637 transitions. Second operand 6 states. [2020-12-22 07:32:38,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:32:38,951 INFO L93 Difference]: Finished difference Result 20403 states and 26243 transitions. [2020-12-22 07:32:38,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:32:38,952 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 65 [2020-12-22 07:32:38,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:32:38,962 INFO L225 Difference]: With dead ends: 20403 [2020-12-22 07:32:38,962 INFO L226 Difference]: Without dead ends: 8243 [2020-12-22 07:32:38,968 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-12-22 07:32:38,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8243 states. [2020-12-22 07:32:39,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8243 to 8243. [2020-12-22 07:32:39,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8243 states. [2020-12-22 07:32:39,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8243 states to 8243 states and 10468 transitions. [2020-12-22 07:32:39,607 INFO L78 Accepts]: Start accepts. Automaton has 8243 states and 10468 transitions. Word has length 65 [2020-12-22 07:32:39,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:32:39,607 INFO L481 AbstractCegarLoop]: Abstraction has 8243 states and 10468 transitions. [2020-12-22 07:32:39,607 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 07:32:39,607 INFO L276 IsEmpty]: Start isEmpty. Operand 8243 states and 10468 transitions. [2020-12-22 07:32:39,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-12-22 07:32:39,608 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:32:39,609 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:32:39,609 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-12-22 07:32:39,609 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:32:39,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:32:39,609 INFO L82 PathProgramCache]: Analyzing trace with hash 67059962, now seen corresponding path program 1 times [2020-12-22 07:32:39,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:32:39,610 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925764967] [2020-12-22 07:32:39,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:32:39,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:32:39,687 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-22 07:32:39,688 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925764967] [2020-12-22 07:32:39,688 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:32:39,688 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-22 07:32:39,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69418103] [2020-12-22 07:32:39,689 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 07:32:39,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:32:39,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 07:32:39,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-22 07:32:39,690 INFO L87 Difference]: Start difference. First operand 8243 states and 10468 transitions. Second operand 7 states. [2020-12-22 07:32:40,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:32:40,777 INFO L93 Difference]: Finished difference Result 15342 states and 19574 transitions. [2020-12-22 07:32:40,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 07:32:40,777 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 65 [2020-12-22 07:32:40,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:32:40,785 INFO L225 Difference]: With dead ends: 15342 [2020-12-22 07:32:40,785 INFO L226 Difference]: Without dead ends: 7210 [2020-12-22 07:32:40,789 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2020-12-22 07:32:40,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7210 states. [2020-12-22 07:32:41,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7210 to 7208. [2020-12-22 07:32:41,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7208 states. [2020-12-22 07:32:41,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7208 states to 7208 states and 9149 transitions. [2020-12-22 07:32:41,356 INFO L78 Accepts]: Start accepts. Automaton has 7208 states and 9149 transitions. Word has length 65 [2020-12-22 07:32:41,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:32:41,356 INFO L481 AbstractCegarLoop]: Abstraction has 7208 states and 9149 transitions. [2020-12-22 07:32:41,356 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 07:32:41,356 INFO L276 IsEmpty]: Start isEmpty. Operand 7208 states and 9149 transitions. [2020-12-22 07:32:41,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 07:32:41,357 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:32:41,357 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:32:41,357 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-12-22 07:32:41,358 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:32:41,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:32:41,358 INFO L82 PathProgramCache]: Analyzing trace with hash -1467200301, now seen corresponding path program 1 times [2020-12-22 07:32:41,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:32:41,358 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037824751] [2020-12-22 07:32:41,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:32:41,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:32:42,531 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:32:42,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037824751] [2020-12-22 07:32:42,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028447549] [2020-12-22 07:32:42,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 07:32:42,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:32:42,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-22 07:32:42,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 07:32:43,088 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 07:32:43,853 WARN L197 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 46 [2020-12-22 07:32:44,531 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 41 [2020-12-22 07:32:44,588 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:32:44,589 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 07:32:44,589 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 12] total 33 [2020-12-22 07:32:44,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148340594] [2020-12-22 07:32:44,590 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-12-22 07:32:44,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:32:44,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-12-22 07:32:44,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=979, Unknown=0, NotChecked=0, Total=1056 [2020-12-22 07:32:44,591 INFO L87 Difference]: Start difference. First operand 7208 states and 9149 transitions. Second operand 33 states. [2020-12-22 07:32:45,041 WARN L197 SmtUtils]: Spent 379.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 81 [2020-12-22 07:32:46,445 WARN L197 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 33 [2020-12-22 07:32:46,658 WARN L197 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 46 [2020-12-22 07:32:46,938 WARN L197 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 61 [2020-12-22 07:32:47,226 WARN L197 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 58 [2020-12-22 07:32:47,612 WARN L197 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 72 [2020-12-22 07:32:48,184 WARN L197 SmtUtils]: Spent 466.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 97 [2020-12-22 07:32:48,621 WARN L197 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 80 [2020-12-22 07:32:49,053 WARN L197 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 80 [2020-12-22 07:32:49,489 WARN L197 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 63 [2020-12-22 07:32:49,946 WARN L197 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 87 [2020-12-22 07:32:50,248 WARN L197 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 59 [2020-12-22 07:32:50,585 WARN L197 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 77 [2020-12-22 07:32:50,972 WARN L197 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 74 [2020-12-22 07:32:51,410 WARN L197 SmtUtils]: Spent 330.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 85 [2020-12-22 07:32:51,805 WARN L197 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 67 [2020-12-22 07:32:52,126 WARN L197 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 73 [2020-12-22 07:32:52,604 WARN L197 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 72 [2020-12-22 07:32:52,915 WARN L197 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 66 [2020-12-22 07:32:53,180 WARN L197 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 64 [2020-12-22 07:32:53,538 WARN L197 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 61 [2020-12-22 07:32:53,884 WARN L197 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 74 [2020-12-22 07:32:54,176 WARN L197 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 56 [2020-12-22 07:32:54,556 WARN L197 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 69 [2020-12-22 07:32:54,812 WARN L197 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2020-12-22 07:32:55,151 WARN L197 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 47 [2020-12-22 07:32:55,475 WARN L197 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 61 [2020-12-22 07:32:56,121 WARN L197 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 35 [2020-12-22 07:32:56,885 WARN L197 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 33 [2020-12-22 07:32:57,311 WARN L197 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 64 [2020-12-22 07:32:57,516 WARN L197 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 39 [2020-12-22 07:32:57,795 WARN L197 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 64 [2020-12-22 07:32:58,155 WARN L197 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 72 [2020-12-22 07:32:58,486 WARN L197 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 72 [2020-12-22 07:33:00,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:33:00,998 INFO L93 Difference]: Finished difference Result 23420 states and 29745 transitions. [2020-12-22 07:33:01,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-12-22 07:33:01,001 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 66 [2020-12-22 07:33:01,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:33:01,022 INFO L225 Difference]: With dead ends: 23420 [2020-12-22 07:33:01,022 INFO L226 Difference]: Without dead ends: 18513 [2020-12-22 07:33:01,030 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1391 ImplicationChecksByTransitivity, 14.1s TimeCoverageRelationStatistics Valid=1049, Invalid=5593, Unknown=0, NotChecked=0, Total=6642 [2020-12-22 07:33:01,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18513 states. [2020-12-22 07:33:01,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18513 to 7635. [2020-12-22 07:33:01,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7635 states. [2020-12-22 07:33:01,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7635 states to 7635 states and 9806 transitions. [2020-12-22 07:33:01,923 INFO L78 Accepts]: Start accepts. Automaton has 7635 states and 9806 transitions. Word has length 66 [2020-12-22 07:33:01,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:33:01,923 INFO L481 AbstractCegarLoop]: Abstraction has 7635 states and 9806 transitions. [2020-12-22 07:33:01,923 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-12-22 07:33:01,923 INFO L276 IsEmpty]: Start isEmpty. Operand 7635 states and 9806 transitions. [2020-12-22 07:33:01,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-12-22 07:33:01,924 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:33:01,924 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:33:02,130 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 07:33:02,131 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:33:02,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:33:02,139 INFO L82 PathProgramCache]: Analyzing trace with hash 395112077, now seen corresponding path program 1 times [2020-12-22 07:33:02,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:33:02,139 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448408951] [2020-12-22 07:33:02,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:33:02,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:33:03,191 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:33:03,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448408951] [2020-12-22 07:33:03,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876118764] [2020-12-22 07:33:03,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 07:33:03,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:33:03,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-22 07:33:03,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 07:33:03,730 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 07:33:04,086 WARN L197 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 34 [2020-12-22 07:33:04,677 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 7 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:33:04,678 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 07:33:04,678 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 12] total 33 [2020-12-22 07:33:04,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900834932] [2020-12-22 07:33:04,679 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-12-22 07:33:04,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:33:04,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-12-22 07:33:04,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=969, Unknown=0, NotChecked=0, Total=1056 [2020-12-22 07:33:04,680 INFO L87 Difference]: Start difference. First operand 7635 states and 9806 transitions. Second operand 33 states. [2020-12-22 07:33:04,903 WARN L197 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-12-22 07:33:05,842 WARN L197 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 36 [2020-12-22 07:33:06,171 WARN L197 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 45 [2020-12-22 07:33:06,634 WARN L197 SmtUtils]: Spent 338.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 73 [2020-12-22 07:33:07,186 WARN L197 SmtUtils]: Spent 411.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 81 [2020-12-22 07:33:07,811 WARN L197 SmtUtils]: Spent 467.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 83 [2020-12-22 07:33:08,681 WARN L197 SmtUtils]: Spent 726.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 98 [2020-12-22 07:33:09,471 WARN L197 SmtUtils]: Spent 601.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 93 [2020-12-22 07:33:09,941 WARN L197 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 76 [2020-12-22 07:33:10,412 WARN L197 SmtUtils]: Spent 333.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 76 [2020-12-22 07:33:10,850 WARN L197 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 59 [2020-12-22 07:33:11,181 WARN L197 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 58 [2020-12-22 07:33:11,533 WARN L197 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 54 [2020-12-22 07:33:11,732 WARN L197 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2020-12-22 07:33:12,339 WARN L197 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 62 [2020-12-22 07:33:12,567 WARN L197 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 51 [2020-12-22 07:33:15,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:33:15,223 INFO L93 Difference]: Finished difference Result 15691 states and 20335 transitions. [2020-12-22 07:33:15,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-12-22 07:33:15,224 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 66 [2020-12-22 07:33:15,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:33:15,237 INFO L225 Difference]: With dead ends: 15691 [2020-12-22 07:33:15,238 INFO L226 Difference]: Without dead ends: 12156 [2020-12-22 07:33:15,243 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 587 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=527, Invalid=2895, Unknown=0, NotChecked=0, Total=3422 [2020-12-22 07:33:15,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12156 states. [2020-12-22 07:33:16,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12156 to 7442. [2020-12-22 07:33:16,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7442 states. [2020-12-22 07:33:16,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7442 states to 7442 states and 9586 transitions. [2020-12-22 07:33:16,029 INFO L78 Accepts]: Start accepts. Automaton has 7442 states and 9586 transitions. Word has length 66 [2020-12-22 07:33:16,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:33:16,029 INFO L481 AbstractCegarLoop]: Abstraction has 7442 states and 9586 transitions. [2020-12-22 07:33:16,029 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-12-22 07:33:16,030 INFO L276 IsEmpty]: Start isEmpty. Operand 7442 states and 9586 transitions. [2020-12-22 07:33:16,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-12-22 07:33:16,030 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:33:16,030 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:33:16,235 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-12-22 07:33:16,236 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:33:16,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:33:16,236 INFO L82 PathProgramCache]: Analyzing trace with hash 855365469, now seen corresponding path program 1 times [2020-12-22 07:33:16,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:33:16,237 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373616880] [2020-12-22 07:33:16,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:33:16,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:33:17,367 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:33:17,367 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373616880] [2020-12-22 07:33:17,367 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122564638] [2020-12-22 07:33:17,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 07:33:17,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:33:17,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-22 07:33:17,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 07:33:17,996 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 07:33:18,519 WARN L197 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 44 [2020-12-22 07:33:19,284 WARN L197 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 35 [2020-12-22 07:33:19,342 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:33:19,342 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 07:33:19,342 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 12] total 32 [2020-12-22 07:33:19,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446083577] [2020-12-22 07:33:19,343 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-12-22 07:33:19,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:33:19,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-12-22 07:33:19,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=915, Unknown=0, NotChecked=0, Total=992 [2020-12-22 07:33:19,344 INFO L87 Difference]: Start difference. First operand 7442 states and 9586 transitions. Second operand 32 states. [2020-12-22 07:33:19,725 WARN L197 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 73 [2020-12-22 07:33:20,904 WARN L197 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 26 [2020-12-22 07:33:21,170 WARN L197 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 30 [2020-12-22 07:33:21,435 WARN L197 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 40 [2020-12-22 07:33:21,786 WARN L197 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 53 [2020-12-22 07:33:22,340 WARN L197 SmtUtils]: Spent 445.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 83 [2020-12-22 07:33:22,978 WARN L197 SmtUtils]: Spent 510.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 94 [2020-12-22 07:33:23,708 WARN L197 SmtUtils]: Spent 590.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 91 [2020-12-22 07:33:24,176 WARN L197 SmtUtils]: Spent 340.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 76 [2020-12-22 07:33:24,637 WARN L197 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 76 [2020-12-22 07:33:25,120 WARN L197 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 76 [2020-12-22 07:33:25,512 WARN L197 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 72 [2020-12-22 07:33:25,873 WARN L197 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 68 [2020-12-22 07:33:26,176 WARN L197 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 59 [2020-12-22 07:33:26,664 WARN L197 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 45 [2020-12-22 07:33:26,950 WARN L197 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 62 [2020-12-22 07:33:27,298 WARN L197 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 45 [2020-12-22 07:33:27,618 WARN L197 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 62 [2020-12-22 07:33:27,930 WARN L197 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 59 [2020-12-22 07:33:28,408 WARN L197 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2020-12-22 07:33:28,726 WARN L197 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 50 [2020-12-22 07:33:29,939 WARN L197 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 65 [2020-12-22 07:33:30,575 WARN L197 SmtUtils]: Spent 379.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 90 [2020-12-22 07:33:30,911 WARN L197 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 56 [2020-12-22 07:33:31,238 WARN L197 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 59 [2020-12-22 07:33:31,684 WARN L197 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 82 [2020-12-22 07:33:34,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:33:34,577 INFO L93 Difference]: Finished difference Result 24176 states and 31344 transitions. [2020-12-22 07:33:34,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-12-22 07:33:34,579 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 67 [2020-12-22 07:33:34,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:33:34,597 INFO L225 Difference]: With dead ends: 24176 [2020-12-22 07:33:34,597 INFO L226 Difference]: Without dead ends: 18404 [2020-12-22 07:33:34,604 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 701 ImplicationChecksByTransitivity, 12.1s TimeCoverageRelationStatistics Valid=626, Invalid=3534, Unknown=0, NotChecked=0, Total=4160 [2020-12-22 07:33:34,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18404 states. [2020-12-22 07:33:35,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18404 to 6648. [2020-12-22 07:33:35,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6648 states. [2020-12-22 07:33:35,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6648 states to 6648 states and 8576 transitions. [2020-12-22 07:33:35,428 INFO L78 Accepts]: Start accepts. Automaton has 6648 states and 8576 transitions. Word has length 67 [2020-12-22 07:33:35,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:33:35,428 INFO L481 AbstractCegarLoop]: Abstraction has 6648 states and 8576 transitions. [2020-12-22 07:33:35,428 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-12-22 07:33:35,428 INFO L276 IsEmpty]: Start isEmpty. Operand 6648 states and 8576 transitions. [2020-12-22 07:33:35,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-12-22 07:33:35,432 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:33:35,432 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:33:35,646 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 07:33:35,647 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:33:35,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:33:35,648 INFO L82 PathProgramCache]: Analyzing trace with hash -1441412763, now seen corresponding path program 1 times [2020-12-22 07:33:35,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:33:35,648 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399349636] [2020-12-22 07:33:35,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:33:35,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:33:35,725 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 85 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-12-22 07:33:35,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399349636] [2020-12-22 07:33:35,726 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 07:33:35,726 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-22 07:33:35,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744837551] [2020-12-22 07:33:35,727 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 07:33:35,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 07:33:35,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 07:33:35,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 07:33:35,730 INFO L87 Difference]: Start difference. First operand 6648 states and 8576 transitions. Second operand 5 states. [2020-12-22 07:33:36,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 07:33:36,769 INFO L93 Difference]: Finished difference Result 14081 states and 18286 transitions. [2020-12-22 07:33:36,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 07:33:36,770 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 111 [2020-12-22 07:33:36,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 07:33:36,780 INFO L225 Difference]: With dead ends: 14081 [2020-12-22 07:33:36,780 INFO L226 Difference]: Without dead ends: 7622 [2020-12-22 07:33:36,786 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-22 07:33:36,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7622 states. [2020-12-22 07:33:37,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7622 to 3626. [2020-12-22 07:33:37,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3626 states. [2020-12-22 07:33:37,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3626 states to 3626 states and 4606 transitions. [2020-12-22 07:33:37,359 INFO L78 Accepts]: Start accepts. Automaton has 3626 states and 4606 transitions. Word has length 111 [2020-12-22 07:33:37,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 07:33:37,359 INFO L481 AbstractCegarLoop]: Abstraction has 3626 states and 4606 transitions. [2020-12-22 07:33:37,359 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 07:33:37,359 INFO L276 IsEmpty]: Start isEmpty. Operand 3626 states and 4606 transitions. [2020-12-22 07:33:37,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-12-22 07:33:37,362 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 07:33:37,362 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:33:37,362 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-12-22 07:33:37,362 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 07:33:37,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 07:33:37,363 INFO L82 PathProgramCache]: Analyzing trace with hash -1865059485, now seen corresponding path program 1 times [2020-12-22 07:33:37,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 07:33:37,363 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300823062] [2020-12-22 07:33:37,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 07:33:37,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:33:38,086 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 22 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 07:33:38,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300823062] [2020-12-22 07:33:38,087 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838719860] [2020-12-22 07:33:38,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 07:33:38,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 07:33:38,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-22 07:33:38,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 07:33:38,525 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 34 [2020-12-22 07:33:39,160 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 7 disjuncts [2020-12-22 07:33:39,335 INFO L757 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 07:33:39,746 INFO L757 QuantifierPusher]: Run 20 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 07:33:40,685 INFO L757 QuantifierPusher]: Run 30 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 07:33:41,991 INFO L757 QuantifierPusher]: Run 40 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 07:33:43,816 INFO L757 QuantifierPusher]: Run 50 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 07:33:48,112 INFO L757 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 07:33:48,139 INFO L757 QuantifierPusher]: Run 20 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2020-12-22 07:33:50,190 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 07:34:16,080 WARN L197 SmtUtils]: Spent 3.20 s on a formula simplification. DAG size of input: 458 DAG size of output: 398 [2020-12-22 07:34:43,430 WARN L197 SmtUtils]: Spent 1.05 s on a formula simplification that was a NOOP. DAG size: 398