/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration false -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/recursive/MultCommutative-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 14:54:39,805 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2020-09-24 14:54:39,877 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 14:54:39,878 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 14:54:39,879 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 14:54:39,880 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 14:54:39,881 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 14:54:39,882 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 14:54:39,883 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 14:54:39,885 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 14:54:39,886 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 14:54:39,887 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 14:54:39,888 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 14:54:39,889 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 14:54:39,891 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-24 14:54:39,899 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 14:54:39,900 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 14:54:39,901 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 14:54:39,902 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-24 14:54:39,928 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 14:54:39,929 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 14:54:39,930 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 14:54:39,930 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 14:54:39,930 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 14:54:39,931 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 14:54:39,931 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 14:54:39,931 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 14:54:39,931 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 14:54:39,931 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 14:54:39,932 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 14:54:39,932 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 14:54:39,932 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 14:54:39,932 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 14:54:39,932 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 14:54:39,933 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 14:54:39,933 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 14:54:39,933 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 14:54:39,933 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 14:54:39,933 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 14:54:39,934 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 14:54:39,934 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 14:54:39,934 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 14:54:39,934 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 14:54:39,935 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 14:54:39,935 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 14:54:39,935 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 14:54:39,935 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 14:54:39,935 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 14:54:39,936 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SingleStatement Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> false [2020-09-24 14:54:40,437 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 14:54:40,455 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 14:54:40,460 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 14:54:40,461 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 14:54:40,462 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 14:54:40,463 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive/MultCommutative-2.c [2020-09-24 14:54:40,558 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b6d2c6748/290cc325c19d4d11bc21351b093d14da/FLAG3cc8ee85e [2020-09-24 14:54:41,132 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 14:54:41,133 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/recursive/MultCommutative-2.c [2020-09-24 14:54:41,143 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b6d2c6748/290cc325c19d4d11bc21351b093d14da/FLAG3cc8ee85e [2020-09-24 14:54:41,489 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b6d2c6748/290cc325c19d4d11bc21351b093d14da [2020-09-24 14:54:41,505 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 14:54:41,512 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 14:54:41,513 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 14:54:41,514 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 14:54:41,518 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 14:54:41,519 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 02:54:41" (1/1) ... [2020-09-24 14:54:41,525 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@788ef5e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:54:41, skipping insertion in model container [2020-09-24 14:54:41,525 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 02:54:41" (1/1) ... [2020-09-24 14:54:41,535 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 14:54:41,561 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 14:54:41,782 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 14:54:41,791 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 14:54:41,816 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 14:54:41,836 INFO L208 MainTranslator]: Completed translation [2020-09-24 14:54:41,836 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:54:41 WrapperNode [2020-09-24 14:54:41,837 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 14:54:41,838 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 14:54:41,838 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 14:54:41,838 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 14:54:41,857 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:54:41" (1/1) ... [2020-09-24 14:54:41,857 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:54:41" (1/1) ... [2020-09-24 14:54:41,946 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:54:41" (1/1) ... [2020-09-24 14:54:41,947 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:54:41" (1/1) ... [2020-09-24 14:54:41,955 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:54:41" (1/1) ... [2020-09-24 14:54:41,957 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:54:41" (1/1) ... [2020-09-24 14:54:41,959 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:54:41" (1/1) ... [2020-09-24 14:54:41,963 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 14:54:41,969 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 14:54:41,969 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 14:54:41,970 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 14:54:41,971 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:54:41" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-24 14:54:42,049 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 14:54:42,050 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 14:54:42,050 INFO L138 BoogieDeclarations]: Found implementation of procedure mult [2020-09-24 14:54:42,050 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 14:54:42,050 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 14:54:42,050 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-24 14:54:42,051 INFO L130 BoogieDeclarations]: Found specification of procedure mult [2020-09-24 14:54:42,051 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 14:54:42,051 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 14:54:42,051 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 14:54:42,313 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 14:54:42,313 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-09-24 14:54:42,321 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 02:54:42 BoogieIcfgContainer [2020-09-24 14:54:42,321 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 14:54:42,323 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 14:54:42,323 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 14:54:42,327 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 14:54:42,327 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 02:54:41" (1/3) ... [2020-09-24 14:54:42,328 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a598c03 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 02:54:42, skipping insertion in model container [2020-09-24 14:54:42,329 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 02:54:41" (2/3) ... [2020-09-24 14:54:42,329 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a598c03 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 02:54:42, skipping insertion in model container [2020-09-24 14:54:42,329 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 02:54:42" (3/3) ... [2020-09-24 14:54:42,332 INFO L109 eAbstractionObserver]: Analyzing ICFG MultCommutative-2.c [2020-09-24 14:54:42,348 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 14:54:42,361 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 14:54:42,389 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 14:54:42,428 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 14:54:42,428 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 14:54:42,428 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 14:54:42,428 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 14:54:42,428 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 14:54:42,429 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 14:54:42,429 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 14:54:42,429 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 14:54:42,457 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states. [2020-09-24 14:54:42,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-09-24 14:54:42,474 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:54:42,475 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] [2020-09-24 14:54:42,476 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:54:42,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:54:42,489 INFO L82 PathProgramCache]: Analyzing trace with hash 2060884630, now seen corresponding path program 1 times [2020-09-24 14:54:42,502 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:54:42,502 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1601347570] [2020-09-24 14:54:42,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:54:42,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:42,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:54:42,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:42,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-24 14:54:42,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:42,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-09-24 14:54:42,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:42,838 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-09-24 14:54:42,841 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1601347570] [2020-09-24 14:54:42,845 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:54:42,845 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-24 14:54:42,846 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118287943] [2020-09-24 14:54:42,855 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 14:54:42,856 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:54:42,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 14:54:42,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-24 14:54:42,879 INFO L87 Difference]: Start difference. First operand 45 states. Second operand 5 states. [2020-09-24 14:54:43,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:54:43,035 INFO L93 Difference]: Finished difference Result 64 states and 76 transitions. [2020-09-24 14:54:43,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-24 14:54:43,038 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 36 [2020-09-24 14:54:43,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:54:43,054 INFO L225 Difference]: With dead ends: 64 [2020-09-24 14:54:43,054 INFO L226 Difference]: Without dead ends: 40 [2020-09-24 14:54:43,060 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-24 14:54:43,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-09-24 14:54:43,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-09-24 14:54:43,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-09-24 14:54:43,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2020-09-24 14:54:43,122 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 36 [2020-09-24 14:54:43,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:54:43,122 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2020-09-24 14:54:43,123 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 14:54:43,123 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2020-09-24 14:54:43,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-09-24 14:54:43,127 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:54:43,127 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2020-09-24 14:54:43,128 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 14:54:43,128 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:54:43,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:54:43,129 INFO L82 PathProgramCache]: Analyzing trace with hash 1309951713, now seen corresponding path program 1 times [2020-09-24 14:54:43,129 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:54:43,130 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1882938995] [2020-09-24 14:54:43,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:54:43,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:43,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:54:43,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:43,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-24 14:54:43,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:43,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-24 14:54:43,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:43,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-09-24 14:54:43,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:43,308 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-09-24 14:54:43,309 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1882938995] [2020-09-24 14:54:43,309 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 14:54:43,309 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-24 14:54:43,310 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936641714] [2020-09-24 14:54:43,316 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 14:54:43,317 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:54:43,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 14:54:43,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-24 14:54:43,320 INFO L87 Difference]: Start difference. First operand 40 states and 46 transitions. Second operand 5 states. [2020-09-24 14:54:43,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:54:43,428 INFO L93 Difference]: Finished difference Result 46 states and 51 transitions. [2020-09-24 14:54:43,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-24 14:54:43,428 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 46 [2020-09-24 14:54:43,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:54:43,431 INFO L225 Difference]: With dead ends: 46 [2020-09-24 14:54:43,431 INFO L226 Difference]: Without dead ends: 40 [2020-09-24 14:54:43,432 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-24 14:54:43,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-09-24 14:54:43,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2020-09-24 14:54:43,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-09-24 14:54:43,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 45 transitions. [2020-09-24 14:54:43,442 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 45 transitions. Word has length 46 [2020-09-24 14:54:43,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:54:43,443 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 45 transitions. [2020-09-24 14:54:43,443 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 14:54:43,443 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 45 transitions. [2020-09-24 14:54:43,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-09-24 14:54:43,445 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:54:43,446 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 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] [2020-09-24 14:54:43,446 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 14:54:43,446 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:54:43,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:54:43,447 INFO L82 PathProgramCache]: Analyzing trace with hash 942191350, now seen corresponding path program 2 times [2020-09-24 14:54:43,447 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:54:43,448 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [859914562] [2020-09-24 14:54:43,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:54:43,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:43,622 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:54:43,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:43,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-24 14:54:43,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:43,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-24 14:54:43,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:43,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-09-24 14:54:43,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:44,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-24 14:54:44,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:44,116 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-09-24 14:54:44,117 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [859914562] [2020-09-24 14:54:44,117 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:54:44,118 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-09-24 14:54:44,118 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43096447] [2020-09-24 14:54:44,119 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-24 14:54:44,119 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:54:44,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-24 14:54:44,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2020-09-24 14:54:44,120 INFO L87 Difference]: Start difference. First operand 40 states and 45 transitions. Second operand 18 states. [2020-09-24 14:54:44,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:54:44,676 INFO L93 Difference]: Finished difference Result 68 states and 78 transitions. [2020-09-24 14:54:44,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-24 14:54:44,679 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 56 [2020-09-24 14:54:44,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:54:44,682 INFO L225 Difference]: With dead ends: 68 [2020-09-24 14:54:44,682 INFO L226 Difference]: Without dead ends: 62 [2020-09-24 14:54:44,683 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=126, Invalid=630, Unknown=0, NotChecked=0, Total=756 [2020-09-24 14:54:44,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-09-24 14:54:44,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 51. [2020-09-24 14:54:44,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-09-24 14:54:44,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 61 transitions. [2020-09-24 14:54:44,701 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 61 transitions. Word has length 56 [2020-09-24 14:54:44,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:54:44,701 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 61 transitions. [2020-09-24 14:54:44,702 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-24 14:54:44,702 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 61 transitions. [2020-09-24 14:54:44,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-09-24 14:54:44,705 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:54:44,705 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 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] [2020-09-24 14:54:44,706 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 14:54:44,706 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:54:44,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:54:44,707 INFO L82 PathProgramCache]: Analyzing trace with hash -156864787, now seen corresponding path program 1 times [2020-09-24 14:54:44,707 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:54:44,708 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1196233554] [2020-09-24 14:54:44,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:54:44,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:44,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:54:44,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:44,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-24 14:54:44,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:44,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-24 14:54:44,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:44,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-09-24 14:54:44,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:44,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-24 14:54:44,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:44,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2020-09-24 14:54:44,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:44,847 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 29 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2020-09-24 14:54:44,847 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1196233554] [2020-09-24 14:54:44,848 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:54:44,848 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-24 14:54:44,848 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691701238] [2020-09-24 14:54:44,849 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 14:54:44,849 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:54:44,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 14:54:44,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-09-24 14:54:44,850 INFO L87 Difference]: Start difference. First operand 51 states and 61 transitions. Second operand 7 states. [2020-09-24 14:54:44,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:54:44,969 INFO L93 Difference]: Finished difference Result 85 states and 109 transitions. [2020-09-24 14:54:44,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-24 14:54:44,970 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 65 [2020-09-24 14:54:44,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:54:44,972 INFO L225 Difference]: With dead ends: 85 [2020-09-24 14:54:44,972 INFO L226 Difference]: Without dead ends: 45 [2020-09-24 14:54:44,973 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-09-24 14:54:44,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-09-24 14:54:44,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-09-24 14:54:44,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-09-24 14:54:44,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 50 transitions. [2020-09-24 14:54:44,982 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 50 transitions. Word has length 65 [2020-09-24 14:54:44,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:54:44,983 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 50 transitions. [2020-09-24 14:54:44,983 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-24 14:54:44,983 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 50 transitions. [2020-09-24 14:54:44,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-09-24 14:54:44,986 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:54:44,986 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 3, 3, 3, 3, 3, 3, 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] [2020-09-24 14:54:44,986 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 14:54:44,987 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:54:44,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:54:44,987 INFO L82 PathProgramCache]: Analyzing trace with hash 387973505, now seen corresponding path program 3 times [2020-09-24 14:54:44,987 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:54:44,988 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1370124049] [2020-09-24 14:54:44,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:54:45,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:45,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:54:45,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:45,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-24 14:54:45,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:45,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-24 14:54:45,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:45,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-09-24 14:54:45,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:45,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-24 14:54:45,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:45,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-24 14:54:45,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:45,614 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 8 proven. 45 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-09-24 14:54:45,615 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1370124049] [2020-09-24 14:54:45,615 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:54:45,616 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-09-24 14:54:45,616 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401803849] [2020-09-24 14:54:45,616 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-24 14:54:45,617 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:54:45,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-24 14:54:45,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2020-09-24 14:54:45,618 INFO L87 Difference]: Start difference. First operand 45 states and 50 transitions. Second operand 22 states. [2020-09-24 14:54:46,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:54:46,420 INFO L93 Difference]: Finished difference Result 62 states and 68 transitions. [2020-09-24 14:54:46,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-24 14:54:46,421 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 66 [2020-09-24 14:54:46,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:54:46,422 INFO L225 Difference]: With dead ends: 62 [2020-09-24 14:54:46,423 INFO L226 Difference]: Without dead ends: 56 [2020-09-24 14:54:46,424 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=162, Invalid=960, Unknown=0, NotChecked=0, Total=1122 [2020-09-24 14:54:46,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-09-24 14:54:46,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 50. [2020-09-24 14:54:46,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-24 14:54:46,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 57 transitions. [2020-09-24 14:54:46,433 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 57 transitions. Word has length 66 [2020-09-24 14:54:46,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:54:46,434 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 57 transitions. [2020-09-24 14:54:46,434 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-24 14:54:46,434 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 57 transitions. [2020-09-24 14:54:46,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-09-24 14:54:46,435 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:54:46,436 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 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] [2020-09-24 14:54:46,436 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-24 14:54:46,436 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:54:46,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:54:46,437 INFO L82 PathProgramCache]: Analyzing trace with hash 681092950, now seen corresponding path program 4 times [2020-09-24 14:54:46,437 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:54:46,437 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [192147292] [2020-09-24 14:54:46,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:54:46,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:46,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:54:46,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:46,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-24 14:54:46,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:46,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-24 14:54:46,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:46,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-09-24 14:54:46,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:46,850 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-24 14:54:46,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:46,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-24 14:54:46,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:47,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-24 14:54:47,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:47,162 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 11 proven. 69 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-09-24 14:54:47,163 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [192147292] [2020-09-24 14:54:47,164 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:54:47,165 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-09-24 14:54:47,165 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883100296] [2020-09-24 14:54:47,166 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-24 14:54:47,166 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:54:47,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-24 14:54:47,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=489, Unknown=0, NotChecked=0, Total=552 [2020-09-24 14:54:47,167 INFO L87 Difference]: Start difference. First operand 50 states and 57 transitions. Second operand 24 states. [2020-09-24 14:54:48,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:54:48,118 INFO L93 Difference]: Finished difference Result 67 states and 75 transitions. [2020-09-24 14:54:48,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-24 14:54:48,118 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 76 [2020-09-24 14:54:48,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:54:48,123 INFO L225 Difference]: With dead ends: 67 [2020-09-24 14:54:48,124 INFO L226 Difference]: Without dead ends: 61 [2020-09-24 14:54:48,127 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=197, Invalid=1285, Unknown=0, NotChecked=0, Total=1482 [2020-09-24 14:54:48,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-09-24 14:54:48,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 55. [2020-09-24 14:54:48,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-09-24 14:54:48,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 64 transitions. [2020-09-24 14:54:48,140 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 64 transitions. Word has length 76 [2020-09-24 14:54:48,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:54:48,141 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 64 transitions. [2020-09-24 14:54:48,141 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-24 14:54:48,141 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 64 transitions. [2020-09-24 14:54:48,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-09-24 14:54:48,143 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:54:48,143 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 5, 5, 5, 5, 5, 5, 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] [2020-09-24 14:54:48,144 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-24 14:54:48,144 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:54:48,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:54:48,144 INFO L82 PathProgramCache]: Analyzing trace with hash -1036512223, now seen corresponding path program 5 times [2020-09-24 14:54:48,145 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:54:48,145 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1243149089] [2020-09-24 14:54:48,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:54:48,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:48,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:54:48,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:48,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-24 14:54:48,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:48,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-24 14:54:48,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:48,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-09-24 14:54:48,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:48,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-24 14:54:48,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:48,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-24 14:54:48,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:48,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-24 14:54:48,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:48,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-24 14:54:48,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:48,872 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 14 proven. 98 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-09-24 14:54:48,873 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1243149089] [2020-09-24 14:54:48,873 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:54:48,873 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-09-24 14:54:48,873 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129338915] [2020-09-24 14:54:48,874 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-24 14:54:48,874 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:54:48,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-24 14:54:48,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=582, Unknown=0, NotChecked=0, Total=650 [2020-09-24 14:54:48,875 INFO L87 Difference]: Start difference. First operand 55 states and 64 transitions. Second operand 26 states. [2020-09-24 14:54:50,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:54:50,068 INFO L93 Difference]: Finished difference Result 72 states and 82 transitions. [2020-09-24 14:54:50,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-24 14:54:50,069 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 86 [2020-09-24 14:54:50,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:54:50,071 INFO L225 Difference]: With dead ends: 72 [2020-09-24 14:54:50,071 INFO L226 Difference]: Without dead ends: 66 [2020-09-24 14:54:50,072 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=232, Invalid=1660, Unknown=0, NotChecked=0, Total=1892 [2020-09-24 14:54:50,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-09-24 14:54:50,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 60. [2020-09-24 14:54:50,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-09-24 14:54:50,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 71 transitions. [2020-09-24 14:54:50,083 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 71 transitions. Word has length 86 [2020-09-24 14:54:50,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:54:50,084 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 71 transitions. [2020-09-24 14:54:50,084 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-24 14:54:50,084 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 71 transitions. [2020-09-24 14:54:50,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-09-24 14:54:50,085 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:54:50,086 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 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] [2020-09-24 14:54:50,086 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-24 14:54:50,086 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:54:50,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:54:50,086 INFO L82 PathProgramCache]: Analyzing trace with hash -972388074, now seen corresponding path program 6 times [2020-09-24 14:54:50,087 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:54:50,087 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1635110854] [2020-09-24 14:54:50,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:54:50,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:50,191 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:54:50,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:50,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-24 14:54:50,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:50,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-24 14:54:50,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:50,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-24 14:54:50,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:50,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-09-24 14:54:50,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:50,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-24 14:54:50,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:50,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-24 14:54:50,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:50,490 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 12 proven. 56 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2020-09-24 14:54:50,491 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1635110854] [2020-09-24 14:54:50,491 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:54:50,491 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-09-24 14:54:50,492 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263015504] [2020-09-24 14:54:50,492 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-24 14:54:50,492 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:54:50,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-24 14:54:50,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2020-09-24 14:54:50,493 INFO L87 Difference]: Start difference. First operand 60 states and 71 transitions. Second operand 17 states. [2020-09-24 14:54:51,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:54:51,017 INFO L93 Difference]: Finished difference Result 76 states and 90 transitions. [2020-09-24 14:54:51,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-24 14:54:51,018 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 76 [2020-09-24 14:54:51,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:54:51,019 INFO L225 Difference]: With dead ends: 76 [2020-09-24 14:54:51,020 INFO L226 Difference]: Without dead ends: 70 [2020-09-24 14:54:51,023 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=132, Invalid=680, Unknown=0, NotChecked=0, Total=812 [2020-09-24 14:54:51,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-09-24 14:54:51,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 64. [2020-09-24 14:54:51,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-09-24 14:54:51,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 79 transitions. [2020-09-24 14:54:51,051 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 79 transitions. Word has length 76 [2020-09-24 14:54:51,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:54:51,052 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 79 transitions. [2020-09-24 14:54:51,052 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-24 14:54:51,052 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 79 transitions. [2020-09-24 14:54:51,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-09-24 14:54:51,053 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:54:51,054 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 3, 3, 3, 3, 3, 3, 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] [2020-09-24 14:54:51,057 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-24 14:54:51,057 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:54:51,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:54:51,058 INFO L82 PathProgramCache]: Analyzing trace with hash -516505397, now seen corresponding path program 7 times [2020-09-24 14:54:51,058 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:54:51,061 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [276821773] [2020-09-24 14:54:51,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:54:51,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:51,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:54:51,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:51,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-24 14:54:51,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:51,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-24 14:54:51,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:51,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-24 14:54:51,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:51,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-09-24 14:54:51,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:51,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-24 14:54:51,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:51,593 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 2 proven. 45 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-09-24 14:54:51,593 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [276821773] [2020-09-24 14:54:51,593 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:54:51,593 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-09-24 14:54:51,598 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996564025] [2020-09-24 14:54:51,599 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-24 14:54:51,599 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:54:51,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-24 14:54:51,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2020-09-24 14:54:51,600 INFO L87 Difference]: Start difference. First operand 64 states and 79 transitions. Second operand 19 states. [2020-09-24 14:54:52,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:54:52,374 INFO L93 Difference]: Finished difference Result 76 states and 89 transitions. [2020-09-24 14:54:52,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-24 14:54:52,374 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 66 [2020-09-24 14:54:52,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:54:52,376 INFO L225 Difference]: With dead ends: 76 [2020-09-24 14:54:52,376 INFO L226 Difference]: Without dead ends: 70 [2020-09-24 14:54:52,377 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=143, Invalid=849, Unknown=0, NotChecked=0, Total=992 [2020-09-24 14:54:52,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-09-24 14:54:52,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 64. [2020-09-24 14:54:52,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-09-24 14:54:52,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 78 transitions. [2020-09-24 14:54:52,399 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 78 transitions. Word has length 66 [2020-09-24 14:54:52,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:54:52,400 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 78 transitions. [2020-09-24 14:54:52,401 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-24 14:54:52,401 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 78 transitions. [2020-09-24 14:54:52,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-09-24 14:54:52,403 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:54:52,404 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 5, 5, 5, 5, 5, 5, 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] [2020-09-24 14:54:52,404 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-24 14:54:52,404 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:54:52,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:54:52,405 INFO L82 PathProgramCache]: Analyzing trace with hash -27101013, now seen corresponding path program 8 times [2020-09-24 14:54:52,405 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:54:52,405 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1901247358] [2020-09-24 14:54:52,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:54:52,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:52,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:54:52,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:52,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-24 14:54:52,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:52,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-24 14:54:52,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:52,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-24 14:54:52,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:52,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-09-24 14:54:52,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:52,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-24 14:54:52,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:52,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-24 14:54:52,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:53,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-24 14:54:53,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:53,075 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 19 proven. 95 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2020-09-24 14:54:53,075 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1901247358] [2020-09-24 14:54:53,076 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:54:53,076 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-09-24 14:54:53,076 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59215445] [2020-09-24 14:54:53,076 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-24 14:54:53,077 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:54:53,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-24 14:54:53,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2020-09-24 14:54:53,077 INFO L87 Difference]: Start difference. First operand 64 states and 78 transitions. Second operand 24 states. [2020-09-24 14:54:54,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:54:54,148 INFO L93 Difference]: Finished difference Result 76 states and 88 transitions. [2020-09-24 14:54:54,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-24 14:54:54,149 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 86 [2020-09-24 14:54:54,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:54:54,150 INFO L225 Difference]: With dead ends: 76 [2020-09-24 14:54:54,150 INFO L226 Difference]: Without dead ends: 70 [2020-09-24 14:54:54,152 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=187, Invalid=1295, Unknown=0, NotChecked=0, Total=1482 [2020-09-24 14:54:54,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-09-24 14:54:54,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 64. [2020-09-24 14:54:54,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-09-24 14:54:54,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 77 transitions. [2020-09-24 14:54:54,161 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 77 transitions. Word has length 86 [2020-09-24 14:54:54,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:54:54,161 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 77 transitions. [2020-09-24 14:54:54,161 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-24 14:54:54,162 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 77 transitions. [2020-09-24 14:54:54,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-09-24 14:54:54,163 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:54:54,163 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 6, 6, 6, 6, 6, 6, 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] [2020-09-24 14:54:54,163 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-24 14:54:54,163 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:54:54,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:54:54,164 INFO L82 PathProgramCache]: Analyzing trace with hash -694157514, now seen corresponding path program 9 times [2020-09-24 14:54:54,164 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:54:54,164 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [747461078] [2020-09-24 14:54:54,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:54:54,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:54,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:54:54,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:54,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-24 14:54:54,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:54,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-24 14:54:54,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:54,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-24 14:54:54,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:54,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-09-24 14:54:54,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:54,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-24 14:54:54,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:54,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-24 14:54:54,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:54,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-24 14:54:54,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:54,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-24 14:54:54,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:55,003 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 24 proven. 129 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2020-09-24 14:54:55,004 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [747461078] [2020-09-24 14:54:55,004 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:54:55,004 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-09-24 14:54:55,004 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355101730] [2020-09-24 14:54:55,005 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-24 14:54:55,005 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:54:55,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-24 14:54:55,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=583, Unknown=0, NotChecked=0, Total=650 [2020-09-24 14:54:55,006 INFO L87 Difference]: Start difference. First operand 64 states and 77 transitions. Second operand 26 states. [2020-09-24 14:54:56,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:54:56,378 INFO L93 Difference]: Finished difference Result 76 states and 87 transitions. [2020-09-24 14:54:56,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-24 14:54:56,379 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 96 [2020-09-24 14:54:56,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:54:56,380 INFO L225 Difference]: With dead ends: 76 [2020-09-24 14:54:56,381 INFO L226 Difference]: Without dead ends: 70 [2020-09-24 14:54:56,381 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=219, Invalid=1673, Unknown=0, NotChecked=0, Total=1892 [2020-09-24 14:54:56,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-09-24 14:54:56,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 60. [2020-09-24 14:54:56,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-09-24 14:54:56,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 71 transitions. [2020-09-24 14:54:56,389 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 71 transitions. Word has length 96 [2020-09-24 14:54:56,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:54:56,389 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 71 transitions. [2020-09-24 14:54:56,389 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-24 14:54:56,389 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 71 transitions. [2020-09-24 14:54:56,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-09-24 14:54:56,390 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:54:56,390 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 6, 6, 6, 6, 6, 6, 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] [2020-09-24 14:54:56,391 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-24 14:54:56,391 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:54:56,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:54:56,391 INFO L82 PathProgramCache]: Analyzing trace with hash 1669317558, now seen corresponding path program 10 times [2020-09-24 14:54:56,392 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:54:56,392 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [853915880] [2020-09-24 14:54:56,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:54:56,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:56,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:54:56,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:56,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-24 14:54:56,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:56,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-24 14:54:56,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:56,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-09-24 14:54:56,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:56,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-24 14:54:56,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:56,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-24 14:54:56,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:56,921 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-24 14:54:56,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:57,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-24 14:54:57,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:57,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-24 14:54:57,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:57,228 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 17 proven. 132 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2020-09-24 14:54:57,229 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [853915880] [2020-09-24 14:54:57,229 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:54:57,229 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-09-24 14:54:57,230 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591081043] [2020-09-24 14:54:57,230 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-24 14:54:57,230 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:54:57,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-24 14:54:57,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=683, Unknown=0, NotChecked=0, Total=756 [2020-09-24 14:54:57,231 INFO L87 Difference]: Start difference. First operand 60 states and 71 transitions. Second operand 28 states. [2020-09-24 14:54:58,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:54:58,795 INFO L93 Difference]: Finished difference Result 81 states and 95 transitions. [2020-09-24 14:54:58,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-24 14:54:58,795 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 96 [2020-09-24 14:54:58,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:54:58,797 INFO L225 Difference]: With dead ends: 81 [2020-09-24 14:54:58,797 INFO L226 Difference]: Without dead ends: 75 [2020-09-24 14:54:58,799 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=267, Invalid=2085, Unknown=0, NotChecked=0, Total=2352 [2020-09-24 14:54:58,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-09-24 14:54:58,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 69. [2020-09-24 14:54:58,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-09-24 14:54:58,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 84 transitions. [2020-09-24 14:54:58,816 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 84 transitions. Word has length 96 [2020-09-24 14:54:58,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:54:58,816 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 84 transitions. [2020-09-24 14:54:58,816 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-24 14:54:58,817 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 84 transitions. [2020-09-24 14:54:58,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-09-24 14:54:58,820 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:54:58,820 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 7, 7, 7, 7, 7, 7, 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] [2020-09-24 14:54:58,820 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-24 14:54:58,820 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:54:58,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:54:58,821 INFO L82 PathProgramCache]: Analyzing trace with hash -1979672437, now seen corresponding path program 11 times [2020-09-24 14:54:58,821 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:54:58,821 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1269689446] [2020-09-24 14:54:58,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:54:58,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:58,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:54:58,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:58,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-24 14:54:58,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:58,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-24 14:54:58,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:59,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-24 14:54:59,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:59,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-09-24 14:54:59,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:59,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-24 14:54:59,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:59,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-24 14:54:59,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:59,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-24 14:54:59,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:59,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-24 14:54:59,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:59,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-24 14:54:59,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:54:59,814 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 29 proven. 168 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2020-09-24 14:54:59,815 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1269689446] [2020-09-24 14:54:59,815 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:54:59,816 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-09-24 14:54:59,816 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947817604] [2020-09-24 14:54:59,817 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-24 14:54:59,817 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:54:59,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-24 14:54:59,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=684, Unknown=0, NotChecked=0, Total=756 [2020-09-24 14:54:59,818 INFO L87 Difference]: Start difference. First operand 69 states and 84 transitions. Second operand 28 states. [2020-09-24 14:55:01,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:55:01,558 INFO L93 Difference]: Finished difference Result 81 states and 94 transitions. [2020-09-24 14:55:01,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-24 14:55:01,559 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 106 [2020-09-24 14:55:01,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:55:01,560 INFO L225 Difference]: With dead ends: 81 [2020-09-24 14:55:01,560 INFO L226 Difference]: Without dead ends: 75 [2020-09-24 14:55:01,562 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=251, Invalid=2101, Unknown=0, NotChecked=0, Total=2352 [2020-09-24 14:55:01,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-09-24 14:55:01,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 65. [2020-09-24 14:55:01,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-09-24 14:55:01,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 78 transitions. [2020-09-24 14:55:01,569 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 78 transitions. Word has length 106 [2020-09-24 14:55:01,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:55:01,569 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 78 transitions. [2020-09-24 14:55:01,570 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-24 14:55:01,570 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 78 transitions. [2020-09-24 14:55:01,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-09-24 14:55:01,571 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:55:01,571 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 4, 4, 4, 4, 4, 4, 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] [2020-09-24 14:55:01,572 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-09-24 14:55:01,572 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:55:01,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:55:01,572 INFO L82 PathProgramCache]: Analyzing trace with hash 275016086, now seen corresponding path program 12 times [2020-09-24 14:55:01,572 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:55:01,573 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1243356037] [2020-09-24 14:55:01,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:55:01,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:01,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:55:01,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:01,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-24 14:55:01,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:01,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-24 14:55:01,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:01,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-24 14:55:01,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:01,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-24 14:55:01,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:01,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-09-24 14:55:01,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:02,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-24 14:55:02,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:02,196 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 2 proven. 72 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2020-09-24 14:55:02,197 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1243356037] [2020-09-24 14:55:02,197 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:55:02,198 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-09-24 14:55:02,198 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904630293] [2020-09-24 14:55:02,201 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-24 14:55:02,202 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:55:02,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-24 14:55:02,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=412, Unknown=0, NotChecked=0, Total=462 [2020-09-24 14:55:02,203 INFO L87 Difference]: Start difference. First operand 65 states and 78 transitions. Second operand 22 states. [2020-09-24 14:55:03,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:55:03,399 INFO L93 Difference]: Finished difference Result 81 states and 98 transitions. [2020-09-24 14:55:03,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-24 14:55:03,400 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 76 [2020-09-24 14:55:03,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:55:03,403 INFO L225 Difference]: With dead ends: 81 [2020-09-24 14:55:03,403 INFO L226 Difference]: Without dead ends: 75 [2020-09-24 14:55:03,404 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=181, Invalid=1225, Unknown=0, NotChecked=0, Total=1406 [2020-09-24 14:55:03,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-09-24 14:55:03,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 69. [2020-09-24 14:55:03,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-09-24 14:55:03,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 87 transitions. [2020-09-24 14:55:03,410 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 87 transitions. Word has length 76 [2020-09-24 14:55:03,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:55:03,411 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 87 transitions. [2020-09-24 14:55:03,411 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-24 14:55:03,411 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 87 transitions. [2020-09-24 14:55:03,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-09-24 14:55:03,413 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:55:03,413 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 5, 5, 5, 5, 5, 5, 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] [2020-09-24 14:55:03,413 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-09-24 14:55:03,413 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:55:03,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:55:03,414 INFO L82 PathProgramCache]: Analyzing trace with hash -945819615, now seen corresponding path program 13 times [2020-09-24 14:55:03,414 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:55:03,414 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1219906258] [2020-09-24 14:55:03,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:55:03,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:03,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:55:03,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:03,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-24 14:55:03,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:03,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-24 14:55:03,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:03,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-24 14:55:03,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:03,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-24 14:55:03,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:03,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-09-24 14:55:03,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:03,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-24 14:55:03,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:04,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-24 14:55:04,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:04,080 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 16 proven. 98 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2020-09-24 14:55:04,081 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1219906258] [2020-09-24 14:55:04,081 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:55:04,081 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-09-24 14:55:04,081 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067084892] [2020-09-24 14:55:04,082 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-24 14:55:04,082 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:55:04,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-24 14:55:04,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=490, Unknown=0, NotChecked=0, Total=552 [2020-09-24 14:55:04,083 INFO L87 Difference]: Start difference. First operand 69 states and 87 transitions. Second operand 24 states. [2020-09-24 14:55:05,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:55:05,238 INFO L93 Difference]: Finished difference Result 81 states and 97 transitions. [2020-09-24 14:55:05,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-24 14:55:05,239 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 86 [2020-09-24 14:55:05,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:55:05,240 INFO L225 Difference]: With dead ends: 81 [2020-09-24 14:55:05,240 INFO L226 Difference]: Without dead ends: 75 [2020-09-24 14:55:05,241 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=187, Invalid=1295, Unknown=0, NotChecked=0, Total=1482 [2020-09-24 14:55:05,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-09-24 14:55:05,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 69. [2020-09-24 14:55:05,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-09-24 14:55:05,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 86 transitions. [2020-09-24 14:55:05,248 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 86 transitions. Word has length 86 [2020-09-24 14:55:05,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:55:05,249 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 86 transitions. [2020-09-24 14:55:05,249 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-24 14:55:05,249 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 86 transitions. [2020-09-24 14:55:05,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-09-24 14:55:05,250 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:55:05,251 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 6, 6, 6, 6, 6, 6, 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] [2020-09-24 14:55:05,251 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-09-24 14:55:05,251 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:55:05,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:55:05,251 INFO L82 PathProgramCache]: Analyzing trace with hash 863423990, now seen corresponding path program 14 times [2020-09-24 14:55:05,252 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:55:05,252 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [368516833] [2020-09-24 14:55:05,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:55:05,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:05,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:55:05,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:05,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-24 14:55:05,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:05,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-24 14:55:05,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:05,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-24 14:55:05,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:05,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-24 14:55:05,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:05,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-09-24 14:55:05,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:05,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-24 14:55:05,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:05,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-24 14:55:05,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:05,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-24 14:55:05,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:05,791 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 21 proven. 115 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2020-09-24 14:55:05,792 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [368516833] [2020-09-24 14:55:05,794 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:55:05,795 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-09-24 14:55:05,795 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784718723] [2020-09-24 14:55:05,796 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-24 14:55:05,796 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:55:05,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-24 14:55:05,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2020-09-24 14:55:05,797 INFO L87 Difference]: Start difference. First operand 69 states and 86 transitions. Second operand 19 states. [2020-09-24 14:55:06,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:55:06,610 INFO L93 Difference]: Finished difference Result 81 states and 96 transitions. [2020-09-24 14:55:06,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-24 14:55:06,611 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 96 [2020-09-24 14:55:06,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:55:06,612 INFO L225 Difference]: With dead ends: 81 [2020-09-24 14:55:06,612 INFO L226 Difference]: Without dead ends: 75 [2020-09-24 14:55:06,613 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=164, Invalid=958, Unknown=0, NotChecked=0, Total=1122 [2020-09-24 14:55:06,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-09-24 14:55:06,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 69. [2020-09-24 14:55:06,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-09-24 14:55:06,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 85 transitions. [2020-09-24 14:55:06,620 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 85 transitions. Word has length 96 [2020-09-24 14:55:06,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:55:06,620 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 85 transitions. [2020-09-24 14:55:06,620 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-24 14:55:06,620 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 85 transitions. [2020-09-24 14:55:06,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-09-24 14:55:06,622 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:55:06,622 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 7, 7, 7, 7, 7, 7, 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] [2020-09-24 14:55:06,622 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-09-24 14:55:06,623 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:55:06,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:55:06,623 INFO L82 PathProgramCache]: Analyzing trace with hash 1359901377, now seen corresponding path program 15 times [2020-09-24 14:55:06,623 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:55:06,624 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [482173910] [2020-09-24 14:55:06,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:55:06,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:06,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:55:06,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:06,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-24 14:55:06,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:06,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-24 14:55:06,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:06,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-24 14:55:06,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:07,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-24 14:55:07,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:07,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-09-24 14:55:07,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:07,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-24 14:55:07,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:07,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-24 14:55:07,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:07,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-24 14:55:07,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:07,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-24 14:55:07,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:07,559 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 28 proven. 169 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2020-09-24 14:55:07,560 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [482173910] [2020-09-24 14:55:07,560 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:55:07,560 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-09-24 14:55:07,560 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169852846] [2020-09-24 14:55:07,560 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-24 14:55:07,561 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:55:07,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-24 14:55:07,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=684, Unknown=0, NotChecked=0, Total=756 [2020-09-24 14:55:07,561 INFO L87 Difference]: Start difference. First operand 69 states and 85 transitions. Second operand 28 states. [2020-09-24 14:55:09,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:55:09,110 INFO L93 Difference]: Finished difference Result 81 states and 95 transitions. [2020-09-24 14:55:09,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-24 14:55:09,111 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 106 [2020-09-24 14:55:09,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:55:09,112 INFO L225 Difference]: With dead ends: 81 [2020-09-24 14:55:09,112 INFO L226 Difference]: Without dead ends: 75 [2020-09-24 14:55:09,113 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=228, Invalid=1842, Unknown=0, NotChecked=0, Total=2070 [2020-09-24 14:55:09,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-09-24 14:55:09,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 69. [2020-09-24 14:55:09,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-09-24 14:55:09,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 84 transitions. [2020-09-24 14:55:09,120 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 84 transitions. Word has length 106 [2020-09-24 14:55:09,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:55:09,120 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 84 transitions. [2020-09-24 14:55:09,120 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-24 14:55:09,120 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 84 transitions. [2020-09-24 14:55:09,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-09-24 14:55:09,122 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:55:09,122 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 8, 8, 8, 8, 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] [2020-09-24 14:55:09,122 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-09-24 14:55:09,123 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:55:09,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:55:09,123 INFO L82 PathProgramCache]: Analyzing trace with hash -412591530, now seen corresponding path program 16 times [2020-09-24 14:55:09,123 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:55:09,123 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1772973002] [2020-09-24 14:55:09,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:55:09,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:09,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:55:09,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:09,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-24 14:55:09,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:09,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-24 14:55:09,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:09,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-24 14:55:09,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:09,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-24 14:55:09,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:09,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-09-24 14:55:09,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:09,671 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-24 14:55:09,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:09,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-24 14:55:09,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:09,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-24 14:55:09,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:09,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-24 14:55:09,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:10,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-24 14:55:10,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:10,156 INFO L134 CoverageAnalysis]: Checked inductivity of 383 backedges. 33 proven. 213 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2020-09-24 14:55:10,157 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1772973002] [2020-09-24 14:55:10,157 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:55:10,157 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-09-24 14:55:10,157 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828081151] [2020-09-24 14:55:10,158 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-09-24 14:55:10,158 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:55:10,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-09-24 14:55:10,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=793, Unknown=0, NotChecked=0, Total=870 [2020-09-24 14:55:10,159 INFO L87 Difference]: Start difference. First operand 69 states and 84 transitions. Second operand 30 states. [2020-09-24 14:55:12,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:55:12,172 INFO L93 Difference]: Finished difference Result 81 states and 94 transitions. [2020-09-24 14:55:12,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-24 14:55:12,173 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 116 [2020-09-24 14:55:12,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:55:12,175 INFO L225 Difference]: With dead ends: 81 [2020-09-24 14:55:12,175 INFO L226 Difference]: Without dead ends: 75 [2020-09-24 14:55:12,178 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 408 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=260, Invalid=2290, Unknown=0, NotChecked=0, Total=2550 [2020-09-24 14:55:12,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-09-24 14:55:12,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 65. [2020-09-24 14:55:12,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-09-24 14:55:12,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 78 transitions. [2020-09-24 14:55:12,183 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 78 transitions. Word has length 116 [2020-09-24 14:55:12,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:55:12,183 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 78 transitions. [2020-09-24 14:55:12,184 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-09-24 14:55:12,184 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 78 transitions. [2020-09-24 14:55:12,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-09-24 14:55:12,185 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:55:12,185 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 7, 7, 7, 7, 7, 7, 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] [2020-09-24 14:55:12,185 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-09-24 14:55:12,186 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:55:12,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:55:12,186 INFO L82 PathProgramCache]: Analyzing trace with hash -1946255679, now seen corresponding path program 17 times [2020-09-24 14:55:12,188 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:55:12,188 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1913683007] [2020-09-24 14:55:12,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:55:12,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:12,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:55:12,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:12,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-24 14:55:12,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:12,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-24 14:55:12,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:12,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-09-24 14:55:12,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:12,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-24 14:55:12,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:12,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-24 14:55:12,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:12,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-24 14:55:12,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:12,801 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-24 14:55:12,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:12,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-24 14:55:12,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:13,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-24 14:55:13,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:13,203 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 20 proven. 171 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2020-09-24 14:55:13,203 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1913683007] [2020-09-24 14:55:13,203 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:55:13,204 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-09-24 14:55:13,204 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350949553] [2020-09-24 14:55:13,206 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-09-24 14:55:13,207 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:55:13,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-09-24 14:55:13,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=792, Unknown=0, NotChecked=0, Total=870 [2020-09-24 14:55:13,208 INFO L87 Difference]: Start difference. First operand 65 states and 78 transitions. Second operand 30 states. [2020-09-24 14:55:15,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:55:15,220 INFO L93 Difference]: Finished difference Result 86 states and 102 transitions. [2020-09-24 14:55:15,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-24 14:55:15,221 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 106 [2020-09-24 14:55:15,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:55:15,222 INFO L225 Difference]: With dead ends: 86 [2020-09-24 14:55:15,222 INFO L226 Difference]: Without dead ends: 80 [2020-09-24 14:55:15,224 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 500 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=302, Invalid=2560, Unknown=0, NotChecked=0, Total=2862 [2020-09-24 14:55:15,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-09-24 14:55:15,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 74. [2020-09-24 14:55:15,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-24 14:55:15,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 91 transitions. [2020-09-24 14:55:15,230 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 91 transitions. Word has length 106 [2020-09-24 14:55:15,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:55:15,231 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 91 transitions. [2020-09-24 14:55:15,231 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-09-24 14:55:15,231 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 91 transitions. [2020-09-24 14:55:15,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-09-24 14:55:15,233 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:55:15,233 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 8, 8, 8, 8, 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] [2020-09-24 14:55:15,233 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-09-24 14:55:15,234 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:55:15,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:55:15,234 INFO L82 PathProgramCache]: Analyzing trace with hash -657519274, now seen corresponding path program 18 times [2020-09-24 14:55:15,234 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:55:15,235 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1215312365] [2020-09-24 14:55:15,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:55:15,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:15,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:55:15,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:15,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-24 14:55:15,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:15,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-24 14:55:15,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:15,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-24 14:55:15,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:15,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-09-24 14:55:15,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:15,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-24 14:55:15,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:15,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-24 14:55:15,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:15,905 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-24 14:55:15,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:16,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-24 14:55:16,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:16,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-24 14:55:16,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:16,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-24 14:55:16,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:16,413 INFO L134 CoverageAnalysis]: Checked inductivity of 383 backedges. 34 proven. 212 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2020-09-24 14:55:16,414 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1215312365] [2020-09-24 14:55:16,414 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:55:16,414 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-09-24 14:55:16,415 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130939450] [2020-09-24 14:55:16,415 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-09-24 14:55:16,415 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:55:16,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-09-24 14:55:16,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=793, Unknown=0, NotChecked=0, Total=870 [2020-09-24 14:55:16,417 INFO L87 Difference]: Start difference. First operand 74 states and 91 transitions. Second operand 30 states. [2020-09-24 14:55:18,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:55:18,511 INFO L93 Difference]: Finished difference Result 90 states and 107 transitions. [2020-09-24 14:55:18,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-24 14:55:18,512 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 116 [2020-09-24 14:55:18,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:55:18,515 INFO L225 Difference]: With dead ends: 90 [2020-09-24 14:55:18,515 INFO L226 Difference]: Without dead ends: 84 [2020-09-24 14:55:18,516 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 484 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=283, Invalid=2579, Unknown=0, NotChecked=0, Total=2862 [2020-09-24 14:55:18,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-09-24 14:55:18,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 74. [2020-09-24 14:55:18,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-24 14:55:18,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 91 transitions. [2020-09-24 14:55:18,523 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 91 transitions. Word has length 116 [2020-09-24 14:55:18,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:55:18,523 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 91 transitions. [2020-09-24 14:55:18,523 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-09-24 14:55:18,524 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 91 transitions. [2020-09-24 14:55:18,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-09-24 14:55:18,525 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:55:18,525 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 9, 9, 9, 9, 9, 9, 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] [2020-09-24 14:55:18,525 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-09-24 14:55:18,526 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:55:18,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:55:18,526 INFO L82 PathProgramCache]: Analyzing trace with hash 1569934689, now seen corresponding path program 19 times [2020-09-24 14:55:18,526 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:55:18,526 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [673111309] [2020-09-24 14:55:18,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:55:18,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:18,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:55:18,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:18,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-24 14:55:18,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:18,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-24 14:55:18,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:18,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-24 14:55:18,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:18,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-24 14:55:18,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:18,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-09-24 14:55:18,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:19,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-24 14:55:19,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:19,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-24 14:55:19,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:19,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-24 14:55:19,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:19,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-24 14:55:19,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:19,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-24 14:55:19,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:19,683 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-24 14:55:19,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:19,843 INFO L134 CoverageAnalysis]: Checked inductivity of 475 backedges. 38 proven. 262 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2020-09-24 14:55:19,844 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [673111309] [2020-09-24 14:55:19,844 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:55:19,845 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-09-24 14:55:19,845 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305266990] [2020-09-24 14:55:19,846 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-09-24 14:55:19,846 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:55:19,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-09-24 14:55:19,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=910, Unknown=0, NotChecked=0, Total=992 [2020-09-24 14:55:19,847 INFO L87 Difference]: Start difference. First operand 74 states and 91 transitions. Second operand 32 states. [2020-09-24 14:55:22,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:55:22,217 INFO L93 Difference]: Finished difference Result 86 states and 101 transitions. [2020-09-24 14:55:22,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-24 14:55:22,218 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 126 [2020-09-24 14:55:22,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:55:22,220 INFO L225 Difference]: With dead ends: 86 [2020-09-24 14:55:22,220 INFO L226 Difference]: Without dead ends: 80 [2020-09-24 14:55:22,222 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 502 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=292, Invalid=2788, Unknown=0, NotChecked=0, Total=3080 [2020-09-24 14:55:22,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-09-24 14:55:22,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 70. [2020-09-24 14:55:22,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-09-24 14:55:22,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 85 transitions. [2020-09-24 14:55:22,228 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 85 transitions. Word has length 126 [2020-09-24 14:55:22,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:55:22,229 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 85 transitions. [2020-09-24 14:55:22,229 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-09-24 14:55:22,229 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 85 transitions. [2020-09-24 14:55:22,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-09-24 14:55:22,230 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:55:22,230 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 7, 7, 7, 7, 7, 7, 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] [2020-09-24 14:55:22,231 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-09-24 14:55:22,231 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:55:22,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:55:22,231 INFO L82 PathProgramCache]: Analyzing trace with hash 1452329227, now seen corresponding path program 20 times [2020-09-24 14:55:22,232 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:55:22,232 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1853684177] [2020-09-24 14:55:22,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:55:22,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:22,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:55:22,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:22,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-24 14:55:22,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:22,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-24 14:55:22,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:22,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-24 14:55:22,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:22,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-24 14:55:22,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:22,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-24 14:55:22,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:22,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-09-24 14:55:22,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:22,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-24 14:55:22,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:23,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-24 14:55:23,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:23,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-24 14:55:23,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:23,186 INFO L134 CoverageAnalysis]: Checked inductivity of 301 backedges. 25 proven. 172 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2020-09-24 14:55:23,186 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1853684177] [2020-09-24 14:55:23,186 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:55:23,186 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-09-24 14:55:23,187 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673792679] [2020-09-24 14:55:23,187 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-24 14:55:23,187 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:55:23,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-24 14:55:23,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=684, Unknown=0, NotChecked=0, Total=756 [2020-09-24 14:55:23,188 INFO L87 Difference]: Start difference. First operand 70 states and 85 transitions. Second operand 28 states. [2020-09-24 14:55:25,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:55:25,059 INFO L93 Difference]: Finished difference Result 86 states and 106 transitions. [2020-09-24 14:55:25,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-24 14:55:25,063 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 106 [2020-09-24 14:55:25,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:55:25,064 INFO L225 Difference]: With dead ends: 86 [2020-09-24 14:55:25,064 INFO L226 Difference]: Without dead ends: 80 [2020-09-24 14:55:25,065 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 318 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=228, Invalid=1842, Unknown=0, NotChecked=0, Total=2070 [2020-09-24 14:55:25,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-09-24 14:55:25,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 74. [2020-09-24 14:55:25,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-24 14:55:25,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 95 transitions. [2020-09-24 14:55:25,071 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 95 transitions. Word has length 106 [2020-09-24 14:55:25,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:55:25,071 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 95 transitions. [2020-09-24 14:55:25,072 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-24 14:55:25,072 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 95 transitions. [2020-09-24 14:55:25,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-09-24 14:55:25,073 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:55:25,073 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 5, 5, 5, 5, 5, 5, 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] [2020-09-24 14:55:25,073 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-09-24 14:55:25,073 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:55:25,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:55:25,074 INFO L82 PathProgramCache]: Analyzing trace with hash -274136789, now seen corresponding path program 21 times [2020-09-24 14:55:25,074 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:55:25,074 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [980342477] [2020-09-24 14:55:25,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:55:25,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:25,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:55:25,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:25,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-24 14:55:25,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:25,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-24 14:55:25,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:25,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-24 14:55:25,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:25,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-24 14:55:25,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:25,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-24 14:55:25,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:25,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-09-24 14:55:25,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:25,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-24 14:55:25,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:25,795 INFO L134 CoverageAnalysis]: Checked inductivity of 167 backedges. 2 proven. 102 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2020-09-24 14:55:25,796 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [980342477] [2020-09-24 14:55:25,796 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:55:25,796 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-09-24 14:55:25,796 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405726151] [2020-09-24 14:55:25,797 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-24 14:55:25,797 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:55:25,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-24 14:55:25,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=497, Unknown=0, NotChecked=0, Total=552 [2020-09-24 14:55:25,798 INFO L87 Difference]: Start difference. First operand 74 states and 95 transitions. Second operand 24 states. [2020-09-24 14:55:27,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:55:27,242 INFO L93 Difference]: Finished difference Result 86 states and 105 transitions. [2020-09-24 14:55:27,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-24 14:55:27,243 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 86 [2020-09-24 14:55:27,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:55:27,244 INFO L225 Difference]: With dead ends: 86 [2020-09-24 14:55:27,244 INFO L226 Difference]: Without dead ends: 80 [2020-09-24 14:55:27,246 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=213, Invalid=1593, Unknown=0, NotChecked=0, Total=1806 [2020-09-24 14:55:27,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-09-24 14:55:27,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 74. [2020-09-24 14:55:27,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-24 14:55:27,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 94 transitions. [2020-09-24 14:55:27,252 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 94 transitions. Word has length 86 [2020-09-24 14:55:27,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:55:27,253 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 94 transitions. [2020-09-24 14:55:27,253 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-24 14:55:27,253 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 94 transitions. [2020-09-24 14:55:27,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-09-24 14:55:27,254 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:55:27,254 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 8, 8, 8, 8, 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] [2020-09-24 14:55:27,254 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-09-24 14:55:27,255 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:55:27,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:55:27,255 INFO L82 PathProgramCache]: Analyzing trace with hash -1695721578, now seen corresponding path program 22 times [2020-09-24 14:55:27,255 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:55:27,255 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1268778094] [2020-09-24 14:55:27,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:55:27,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:27,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:55:27,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:27,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-24 14:55:27,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:27,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-24 14:55:27,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:27,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-24 14:55:27,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:27,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-24 14:55:27,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:27,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-24 14:55:27,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:27,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-09-24 14:55:27,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:27,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-24 14:55:27,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:27,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-24 14:55:27,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:27,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-24 14:55:27,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:27,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-24 14:55:27,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:27,987 INFO L134 CoverageAnalysis]: Checked inductivity of 383 backedges. 30 proven. 194 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2020-09-24 14:55:27,988 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1268778094] [2020-09-24 14:55:27,988 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:55:27,989 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-09-24 14:55:27,989 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738661083] [2020-09-24 14:55:27,991 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-24 14:55:27,992 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:55:27,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-24 14:55:27,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2020-09-24 14:55:27,993 INFO L87 Difference]: Start difference. First operand 74 states and 94 transitions. Second operand 21 states. [2020-09-24 14:55:29,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:55:29,137 INFO L93 Difference]: Finished difference Result 86 states and 104 transitions. [2020-09-24 14:55:29,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-24 14:55:29,138 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 116 [2020-09-24 14:55:29,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:55:29,140 INFO L225 Difference]: With dead ends: 86 [2020-09-24 14:55:29,140 INFO L226 Difference]: Without dead ends: 80 [2020-09-24 14:55:29,142 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=196, Invalid=1286, Unknown=0, NotChecked=0, Total=1482 [2020-09-24 14:55:29,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-09-24 14:55:29,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 74. [2020-09-24 14:55:29,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-24 14:55:29,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 93 transitions. [2020-09-24 14:55:29,148 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 93 transitions. Word has length 116 [2020-09-24 14:55:29,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:55:29,148 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 93 transitions. [2020-09-24 14:55:29,148 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-24 14:55:29,149 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 93 transitions. [2020-09-24 14:55:29,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-09-24 14:55:29,150 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:55:29,150 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 6, 6, 6, 6, 6, 6, 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] [2020-09-24 14:55:29,150 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-09-24 14:55:29,150 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:55:29,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:55:29,151 INFO L82 PathProgramCache]: Analyzing trace with hash -261107338, now seen corresponding path program 23 times [2020-09-24 14:55:29,151 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:55:29,151 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [444233717] [2020-09-24 14:55:29,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:55:29,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:29,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:55:29,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:29,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-24 14:55:29,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:29,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-24 14:55:29,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:29,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-24 14:55:29,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:29,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-24 14:55:29,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:29,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-24 14:55:29,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:29,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-09-24 14:55:29,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:29,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-24 14:55:29,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:29,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-24 14:55:29,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:29,966 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 20 proven. 133 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2020-09-24 14:55:29,966 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [444233717] [2020-09-24 14:55:29,966 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:55:29,966 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-09-24 14:55:29,966 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513636746] [2020-09-24 14:55:29,967 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-24 14:55:29,967 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:55:29,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-24 14:55:29,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=583, Unknown=0, NotChecked=0, Total=650 [2020-09-24 14:55:29,968 INFO L87 Difference]: Start difference. First operand 74 states and 93 transitions. Second operand 26 states. [2020-09-24 14:55:31,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:55:31,522 INFO L93 Difference]: Finished difference Result 86 states and 103 transitions. [2020-09-24 14:55:31,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-24 14:55:31,523 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 96 [2020-09-24 14:55:31,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:55:31,525 INFO L225 Difference]: With dead ends: 86 [2020-09-24 14:55:31,525 INFO L226 Difference]: Without dead ends: 80 [2020-09-24 14:55:31,526 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=219, Invalid=1673, Unknown=0, NotChecked=0, Total=1892 [2020-09-24 14:55:31,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-09-24 14:55:31,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 74. [2020-09-24 14:55:31,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-24 14:55:31,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 92 transitions. [2020-09-24 14:55:31,532 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 92 transitions. Word has length 96 [2020-09-24 14:55:31,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:55:31,533 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 92 transitions. [2020-09-24 14:55:31,533 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-24 14:55:31,533 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 92 transitions. [2020-09-24 14:55:31,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-09-24 14:55:31,534 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:55:31,535 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 9, 9, 9, 9, 9, 9, 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] [2020-09-24 14:55:31,535 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-09-24 14:55:31,535 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:55:31,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:55:31,536 INFO L82 PathProgramCache]: Analyzing trace with hash -2059208469, now seen corresponding path program 24 times [2020-09-24 14:55:31,536 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:55:31,536 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1961363629] [2020-09-24 14:55:31,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:55:31,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:31,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:55:31,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:31,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-24 14:55:31,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:31,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-24 14:55:31,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:31,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-24 14:55:31,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:31,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-24 14:55:31,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:32,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-24 14:55:32,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:32,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-09-24 14:55:32,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:32,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-24 14:55:32,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:32,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-24 14:55:32,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:32,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-24 14:55:32,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:32,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-24 14:55:32,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:32,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-24 14:55:32,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:32,807 INFO L134 CoverageAnalysis]: Checked inductivity of 475 backedges. 37 proven. 263 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2020-09-24 14:55:32,807 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1961363629] [2020-09-24 14:55:32,807 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:55:32,807 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-09-24 14:55:32,807 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583672748] [2020-09-24 14:55:32,808 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-09-24 14:55:32,808 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:55:32,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-09-24 14:55:32,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=910, Unknown=0, NotChecked=0, Total=992 [2020-09-24 14:55:32,809 INFO L87 Difference]: Start difference. First operand 74 states and 92 transitions. Second operand 32 states. [2020-09-24 14:55:35,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 14:55:35,085 INFO L93 Difference]: Finished difference Result 86 states and 102 transitions. [2020-09-24 14:55:35,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-24 14:55:35,087 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 126 [2020-09-24 14:55:35,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 14:55:35,088 INFO L225 Difference]: With dead ends: 86 [2020-09-24 14:55:35,088 INFO L226 Difference]: Without dead ends: 80 [2020-09-24 14:55:35,090 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 426 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=269, Invalid=2487, Unknown=0, NotChecked=0, Total=2756 [2020-09-24 14:55:35,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-09-24 14:55:35,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 74. [2020-09-24 14:55:35,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-24 14:55:35,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 91 transitions. [2020-09-24 14:55:35,095 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 91 transitions. Word has length 126 [2020-09-24 14:55:35,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 14:55:35,096 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 91 transitions. [2020-09-24 14:55:35,096 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-09-24 14:55:35,096 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 91 transitions. [2020-09-24 14:55:35,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-09-24 14:55:35,097 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 14:55:35,097 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 10, 10, 10, 10, 10, 10, 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] [2020-09-24 14:55:35,097 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-09-24 14:55:35,097 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 14:55:35,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 14:55:35,098 INFO L82 PathProgramCache]: Analyzing trace with hash -1034127946, now seen corresponding path program 25 times [2020-09-24 14:55:35,098 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 14:55:35,098 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [819870938] [2020-09-24 14:55:35,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 14:55:35,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:35,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 14:55:35,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:35,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-09-24 14:55:35,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:35,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-24 14:55:35,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:35,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-24 14:55:35,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:35,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-24 14:55:35,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:35,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-24 14:55:35,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:35,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-09-24 14:55:35,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:35,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-24 14:55:35,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:35,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-24 14:55:35,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:35,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-24 14:55:35,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:36,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-24 14:55:36,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:36,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-24 14:55:36,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:36,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2020-09-24 14:55:36,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 14:55:36,479 INFO L134 CoverageAnalysis]: Checked inductivity of 577 backedges. 42 proven. 317 refuted. 0 times theorem prover too weak. 218 trivial. 0 not checked. [2020-09-24 14:55:36,479 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [819870938] [2020-09-24 14:55:36,479 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 14:55:36,479 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-09-24 14:55:36,480 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026697616] [2020-09-24 14:55:36,480 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-09-24 14:55:36,480 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 14:55:36,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants.