/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 --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options interpolation-heuristic=FIRST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/ldv-regression/test24-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-eb0fd7c [2020-09-21 11:23:49,984 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-21 11:23:49,989 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-21 11:23:50,038 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-21 11:23:50,039 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-21 11:23:50,051 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-21 11:23:50,054 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-21 11:23:50,057 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-21 11:23:50,060 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-21 11:23:50,064 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-21 11:23:50,065 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-21 11:23:50,067 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-21 11:23:50,068 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-21 11:23:50,071 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-21 11:23:50,074 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-21 11:23:50,076 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-21 11:23:50,079 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-21 11:23:50,080 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-21 11:23:50,082 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-21 11:23:50,092 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-21 11:23:50,094 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-21 11:23:50,095 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-21 11:23:50,097 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-21 11:23:50,098 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-21 11:23:50,101 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-21 11:23:50,101 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-21 11:23:50,101 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-21 11:23:50,104 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-21 11:23:50,105 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-21 11:23:50,107 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-21 11:23:50,107 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-21 11:23:50,108 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-21 11:23:50,109 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-21 11:23:50,110 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-21 11:23:50,112 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-21 11:23:50,112 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-21 11:23:50,113 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-21 11:23:50,113 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-21 11:23:50,113 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-21 11:23:50,114 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-21 11:23:50,116 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-21 11:23:50,117 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 [2020-09-21 11:23:50,167 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-21 11:23:50,168 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-21 11:23:50,169 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-21 11:23:50,170 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-21 11:23:50,170 INFO L138 SettingsManager]: * Use SBE=true [2020-09-21 11:23:50,170 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-21 11:23:50,170 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-21 11:23:50,171 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-21 11:23:50,171 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-21 11:23:50,171 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-21 11:23:50,172 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-21 11:23:50,172 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-21 11:23:50,173 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-21 11:23:50,173 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-21 11:23:50,173 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-21 11:23:50,173 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-21 11:23:50,174 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-21 11:23:50,174 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-21 11:23:50,174 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-21 11:23:50,174 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-21 11:23:50,174 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-21 11:23:50,175 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-21 11:23:50,175 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-21 11:23:50,175 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-21 11:23:50,175 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-21 11:23:50,175 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-21 11:23:50,176 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-21 11:23:50,176 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-21 11:23:50,176 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-21 11:23:50,176 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.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;interpolation-heuristic=FIRST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;interpolation-heuristic=FIRST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;interpolation-heuristic=FIRST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;interpolation-heuristic=FIRST;log-additional-information=true; [2020-09-21 11:23:50,605 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-21 11:23:50,624 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-21 11:23:50,628 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-21 11:23:50,630 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-21 11:23:50,630 INFO L275 PluginConnector]: CDTParser initialized [2020-09-21 11:23:50,632 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-regression/test24-2.c [2020-09-21 11:23:50,714 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/eac900b92/3c7b429d956a49cfbcc2ad64cf0449fd/FLAGef9446863 [2020-09-21 11:23:51,274 INFO L306 CDTParser]: Found 1 translation units. [2020-09-21 11:23:51,275 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/ldv-regression/test24-2.c [2020-09-21 11:23:51,283 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/eac900b92/3c7b429d956a49cfbcc2ad64cf0449fd/FLAGef9446863 [2020-09-21 11:23:51,613 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/eac900b92/3c7b429d956a49cfbcc2ad64cf0449fd [2020-09-21 11:23:51,630 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-21 11:23:51,635 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-21 11:23:51,637 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-21 11:23:51,637 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-21 11:23:51,643 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-21 11:23:51,644 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 11:23:51" (1/1) ... [2020-09-21 11:23:51,650 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@963cacb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:23:51, skipping insertion in model container [2020-09-21 11:23:51,650 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 11:23:51" (1/1) ... [2020-09-21 11:23:51,660 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-21 11:23:51,685 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-21 11:23:51,909 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 11:23:51,926 INFO L203 MainTranslator]: Completed pre-run [2020-09-21 11:23:51,950 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-21 11:23:51,969 INFO L208 MainTranslator]: Completed translation [2020-09-21 11:23:51,970 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:23:51 WrapperNode [2020-09-21 11:23:51,970 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-21 11:23:51,971 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-21 11:23:51,971 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-21 11:23:51,971 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-21 11:23:52,068 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:23:51" (1/1) ... [2020-09-21 11:23:52,069 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:23:51" (1/1) ... [2020-09-21 11:23:52,078 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:23:51" (1/1) ... [2020-09-21 11:23:52,079 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:23:51" (1/1) ... [2020-09-21 11:23:52,087 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:23:51" (1/1) ... [2020-09-21 11:23:52,093 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:23:51" (1/1) ... [2020-09-21 11:23:52,095 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:23:51" (1/1) ... [2020-09-21 11:23:52,097 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-21 11:23:52,098 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-21 11:23:52,098 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-21 11:23:52,098 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-21 11:23:52,100 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:23:51" (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 [2020-09-21 11:23:52,176 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-21 11:23:52,176 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-21 11:23:52,176 INFO L138 BoogieDeclarations]: Found implementation of procedure check [2020-09-21 11:23:52,176 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-21 11:23:52,177 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-21 11:23:52,177 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-21 11:23:52,177 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-09-21 11:23:52,177 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-09-21 11:23:52,178 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-21 11:23:52,178 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-21 11:23:52,178 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-21 11:23:52,178 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-21 11:23:52,178 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-21 11:23:52,179 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-21 11:23:52,494 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-21 11:23:52,494 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-09-21 11:23:52,499 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 11:23:52 BoogieIcfgContainer [2020-09-21 11:23:52,499 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-21 11:23:52,501 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-21 11:23:52,501 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-21 11:23:52,504 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-21 11:23:52,505 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 11:23:51" (1/3) ... [2020-09-21 11:23:52,506 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@318a4dbc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 11:23:52, skipping insertion in model container [2020-09-21 11:23:52,506 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 11:23:51" (2/3) ... [2020-09-21 11:23:52,506 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@318a4dbc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 11:23:52, skipping insertion in model container [2020-09-21 11:23:52,507 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 11:23:52" (3/3) ... [2020-09-21 11:23:52,509 INFO L109 eAbstractionObserver]: Analyzing ICFG test24-2.c [2020-09-21 11:23:52,518 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-21 11:23:52,527 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-21 11:23:52,545 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-21 11:23:52,571 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-21 11:23:52,571 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-21 11:23:52,571 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-21 11:23:52,572 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-21 11:23:52,572 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-21 11:23:52,572 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-21 11:23:52,572 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-21 11:23:52,572 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-21 11:23:52,592 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2020-09-21 11:23:52,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-21 11:23:52,599 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:23:52,600 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:23:52,600 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:23:52,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:23:52,607 INFO L82 PathProgramCache]: Analyzing trace with hash 855240046, now seen corresponding path program 1 times [2020-09-21 11:23:52,616 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:23:52,617 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1642143313] [2020-09-21 11:23:52,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:23:52,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:52,754 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:52,754 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:52,754 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:52,755 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:52,755 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-09-21 11:23:52,755 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:52,756 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-09-21 11:23:52,756 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:52,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:23:52,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-21 11:23:52,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:23:52,757 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:23:52,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:23:52,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:52,831 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:52,832 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:52,832 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:52,832 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:52,832 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:23:52,833 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:52,833 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 11:23:52,833 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:52,833 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:23:52,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:23:52,834 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:23:52,834 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:23:52,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2020-09-21 11:23:52,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:52,853 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:52,853 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:52,853 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:52,854 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:52,854 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:23:52,854 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:52,855 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 11:23:52,855 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:52,855 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:23:52,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-09-21 11:23:52,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:23:52,856 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:23:52,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:23:52,868 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1642143313] [2020-09-21 11:23:52,871 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 11:23:52,871 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-21 11:23:52,872 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645294020] [2020-09-21 11:23:52,878 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-21 11:23:52,878 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:23:52,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-21 11:23:52,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 11:23:52,896 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 3 states. [2020-09-21 11:23:53,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:23:53,013 INFO L93 Difference]: Finished difference Result 42 states and 50 transitions. [2020-09-21 11:23:53,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-21 11:23:53,016 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-09-21 11:23:53,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:23:53,029 INFO L225 Difference]: With dead ends: 42 [2020-09-21 11:23:53,029 INFO L226 Difference]: Without dead ends: 20 [2020-09-21 11:23:53,034 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-21 11:23:53,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-09-21 11:23:53,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-09-21 11:23:53,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-09-21 11:23:53,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-09-21 11:23:53,075 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 17 [2020-09-21 11:23:53,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:23:53,076 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-09-21 11:23:53,076 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-21 11:23:53,076 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-09-21 11:23:53,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-21 11:23:53,077 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:23:53,077 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:23:53,078 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-21 11:23:53,079 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:23:53,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:23:53,079 INFO L82 PathProgramCache]: Analyzing trace with hash -1631497781, now seen corresponding path program 1 times [2020-09-21 11:23:53,080 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:23:53,080 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [118147376] [2020-09-21 11:23:53,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:23:53,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:53,126 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:53,126 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:53,126 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:53,127 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:53,127 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-21 11:23:53,127 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:53,127 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-09-21 11:23:53,128 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:53,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-21 11:23:53,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 11:23:53,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-09-21 11:23:53,129 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:23:53,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:23:53,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:53,174 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:53,174 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:53,174 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:53,175 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:53,175 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:23:53,175 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:53,176 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:23:53,176 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:53,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:23:53,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:23:53,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:23:53,177 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:23:53,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-21 11:23:53,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:53,189 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:53,189 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:53,190 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:53,190 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:53,190 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:23:53,191 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:53,191 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:23:53,191 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:53,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:23:53,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-09-21 11:23:53,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:23:53,192 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:23:53,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:23:53,200 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [118147376] [2020-09-21 11:23:53,201 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-21 11:23:53,201 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-21 11:23:53,201 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174218613] [2020-09-21 11:23:53,203 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-21 11:23:53,204 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:23:53,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-21 11:23:53,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-21 11:23:53,205 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 4 states. [2020-09-21 11:23:53,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:23:53,262 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2020-09-21 11:23:53,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-21 11:23:53,263 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2020-09-21 11:23:53,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:23:53,264 INFO L225 Difference]: With dead ends: 34 [2020-09-21 11:23:53,264 INFO L226 Difference]: Without dead ends: 22 [2020-09-21 11:23:53,265 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-21 11:23:53,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-09-21 11:23:53,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2020-09-21 11:23:53,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-09-21 11:23:53,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-09-21 11:23:53,272 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 18 [2020-09-21 11:23:53,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:23:53,273 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-09-21 11:23:53,273 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-21 11:23:53,273 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-09-21 11:23:53,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-21 11:23:53,274 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:23:53,274 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:23:53,274 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-21 11:23:53,274 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:23:53,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:23:53,275 INFO L82 PathProgramCache]: Analyzing trace with hash 1934775405, now seen corresponding path program 1 times [2020-09-21 11:23:53,275 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:23:53,276 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1146835886] [2020-09-21 11:23:53,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:23:53,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:53,306 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:53,307 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:53,307 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:53,307 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:53,307 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-09-21 11:23:53,307 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:53,308 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-09-21 11:23:53,308 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:53,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-21 11:23:53,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 11:23:53,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-09-21 11:23:53,309 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:23:53,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:23:53,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:53,373 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:53,373 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:53,374 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:53,374 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:53,374 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:23:53,374 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:53,376 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-21 11:23:53,376 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:53,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:23:53,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:23:53,377 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:23:53,377 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:23:53,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2020-09-21 11:23:53,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:53,400 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:53,401 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:53,401 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:53,401 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:53,402 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:23:53,404 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:53,404 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:23:53,404 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:53,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:23:53,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-09-21 11:23:53,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:23:53,406 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:23:53,420 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:23:53,421 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1146835886] [2020-09-21 11:23:53,421 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:23:53,422 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-21 11:23:53,422 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904583764] [2020-09-21 11:23:53,423 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-21 11:23:53,425 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:23:53,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-21 11:23:53,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-21 11:23:53,426 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 5 states. [2020-09-21 11:23:53,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:23:53,513 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2020-09-21 11:23:53,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-21 11:23:53,514 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-09-21 11:23:53,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:23:53,515 INFO L225 Difference]: With dead ends: 36 [2020-09-21 11:23:53,515 INFO L226 Difference]: Without dead ends: 24 [2020-09-21 11:23:53,516 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-21 11:23:53,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-09-21 11:23:53,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2020-09-21 11:23:53,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-09-21 11:23:53,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2020-09-21 11:23:53,523 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 20 [2020-09-21 11:23:53,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:23:53,523 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2020-09-21 11:23:53,523 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-21 11:23:53,524 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2020-09-21 11:23:53,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-21 11:23:53,524 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:23:53,525 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:23:53,525 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-21 11:23:53,525 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:23:53,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:23:53,526 INFO L82 PathProgramCache]: Analyzing trace with hash 1739404943, now seen corresponding path program 2 times [2020-09-21 11:23:53,526 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:23:53,526 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [797024287] [2020-09-21 11:23:53,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:23:53,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:53,573 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:53,589 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:53,589 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:53,589 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:53,590 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-09-21 11:23:53,590 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:53,590 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-09-21 11:23:53,590 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:53,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-21 11:23:53,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 11:23:53,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-21 11:23:53,591 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:23:53,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:23:53,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:53,644 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:53,645 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:53,645 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:53,645 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:53,645 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:23:53,646 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:53,646 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:23:53,646 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:53,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:23:53,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:23:53,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:23:53,647 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:23:53,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-09-21 11:23:53,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:53,654 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:53,654 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:53,655 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:53,655 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:53,655 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:23:53,655 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:53,655 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:23:53,656 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:53,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:23:53,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-09-21 11:23:53,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:23:53,656 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:23:53,661 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:23:53,662 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [797024287] [2020-09-21 11:23:53,662 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:23:53,662 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-21 11:23:53,662 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86195023] [2020-09-21 11:23:53,663 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-21 11:23:53,663 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:23:53,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-21 11:23:53,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-09-21 11:23:53,664 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 6 states. [2020-09-21 11:23:53,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:23:53,726 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2020-09-21 11:23:53,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-21 11:23:53,727 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2020-09-21 11:23:53,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:23:53,728 INFO L225 Difference]: With dead ends: 38 [2020-09-21 11:23:53,728 INFO L226 Difference]: Without dead ends: 26 [2020-09-21 11:23:53,729 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-09-21 11:23:53,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-09-21 11:23:53,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2020-09-21 11:23:53,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-09-21 11:23:53,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2020-09-21 11:23:53,735 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 22 [2020-09-21 11:23:53,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:23:53,735 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2020-09-21 11:23:53,735 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-21 11:23:53,736 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2020-09-21 11:23:53,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-21 11:23:53,736 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:23:53,737 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:23:53,737 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-21 11:23:53,737 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:23:53,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:23:53,738 INFO L82 PathProgramCache]: Analyzing trace with hash -1328015311, now seen corresponding path program 3 times [2020-09-21 11:23:53,738 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:23:53,738 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1708651881] [2020-09-21 11:23:53,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:23:53,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:53,781 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:53,781 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:53,781 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:53,781 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:53,782 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-09-21 11:23:53,782 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:53,782 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-09-21 11:23:53,782 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:53,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-21 11:23:53,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 11:23:53,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-21 11:23:53,783 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:23:53,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:23:53,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:53,856 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:53,857 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:53,857 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:53,857 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:53,857 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:23:53,858 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:53,858 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:23:53,858 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:53,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:23:53,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:23:53,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:23:53,859 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:23:53,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2020-09-21 11:23:53,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:53,867 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:53,867 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:53,867 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:53,868 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:53,868 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:23:53,868 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:53,868 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:23:53,869 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:53,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:23:53,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-09-21 11:23:53,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:23:53,869 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:23:53,874 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:23:53,875 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1708651881] [2020-09-21 11:23:53,875 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:23:53,875 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-21 11:23:53,876 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983367314] [2020-09-21 11:23:53,876 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-21 11:23:53,876 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:23:53,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-21 11:23:53,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-09-21 11:23:53,877 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 7 states. [2020-09-21 11:23:53,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:23:53,940 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2020-09-21 11:23:53,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-21 11:23:53,941 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 24 [2020-09-21 11:23:53,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:23:53,942 INFO L225 Difference]: With dead ends: 40 [2020-09-21 11:23:53,942 INFO L226 Difference]: Without dead ends: 28 [2020-09-21 11:23:53,943 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-09-21 11:23:53,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-09-21 11:23:53,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2020-09-21 11:23:53,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-09-21 11:23:53,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-09-21 11:23:53,949 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 24 [2020-09-21 11:23:53,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:23:53,950 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-09-21 11:23:53,950 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-21 11:23:53,950 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-09-21 11:23:53,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-21 11:23:53,951 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:23:53,951 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:23:53,951 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-21 11:23:53,952 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:23:53,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:23:53,952 INFO L82 PathProgramCache]: Analyzing trace with hash 1523652947, now seen corresponding path program 4 times [2020-09-21 11:23:53,952 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:23:53,953 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1714283200] [2020-09-21 11:23:53,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:23:53,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:54,022 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:54,022 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:54,023 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:54,023 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:54,023 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-09-21 11:23:54,023 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:54,023 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-09-21 11:23:54,023 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:54,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-21 11:23:54,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 11:23:54,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-09-21 11:23:54,024 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:23:54,126 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:23:54,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:54,130 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:54,130 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:54,130 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:54,131 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:54,131 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:23:54,131 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:54,131 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:23:54,132 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:54,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:23:54,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:23:54,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:23:54,133 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:23:54,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-09-21 11:23:54,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:54,138 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:54,138 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:54,139 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:54,139 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:54,139 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:23:54,139 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:54,139 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:23:54,140 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:54,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:23:54,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-09-21 11:23:54,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:23:54,141 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:23:54,145 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:23:54,145 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1714283200] [2020-09-21 11:23:54,145 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:23:54,145 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-21 11:23:54,146 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303472268] [2020-09-21 11:23:54,146 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-21 11:23:54,146 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:23:54,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-21 11:23:54,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-09-21 11:23:54,147 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 8 states. [2020-09-21 11:23:54,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:23:54,210 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2020-09-21 11:23:54,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-21 11:23:54,211 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 26 [2020-09-21 11:23:54,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:23:54,211 INFO L225 Difference]: With dead ends: 42 [2020-09-21 11:23:54,212 INFO L226 Difference]: Without dead ends: 30 [2020-09-21 11:23:54,212 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-09-21 11:23:54,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-09-21 11:23:54,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2020-09-21 11:23:54,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-09-21 11:23:54,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2020-09-21 11:23:54,218 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 26 [2020-09-21 11:23:54,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:23:54,218 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2020-09-21 11:23:54,218 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-21 11:23:54,218 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2020-09-21 11:23:54,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-21 11:23:54,219 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:23:54,219 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:23:54,220 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-21 11:23:54,220 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:23:54,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:23:54,220 INFO L82 PathProgramCache]: Analyzing trace with hash 1787714037, now seen corresponding path program 5 times [2020-09-21 11:23:54,221 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:23:54,221 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1231019190] [2020-09-21 11:23:54,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:23:54,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:54,258 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:54,258 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:54,259 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:54,259 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:54,259 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-09-21 11:23:54,259 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:54,259 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-09-21 11:23:54,260 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:54,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-21 11:23:54,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 11:23:54,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-21 11:23:54,261 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:23:54,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:23:54,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:54,337 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:54,337 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:54,337 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:54,338 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:54,338 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:23:54,338 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:54,338 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:23:54,338 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:54,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:23:54,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:23:54,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:23:54,339 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:23:54,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-09-21 11:23:54,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:54,344 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:54,344 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:54,345 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:54,345 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:54,345 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:23:54,345 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:54,345 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:23:54,346 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:54,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:23:54,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-09-21 11:23:54,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:23:54,346 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:23:54,351 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:23:54,351 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1231019190] [2020-09-21 11:23:54,351 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:23:54,351 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-21 11:23:54,352 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484134008] [2020-09-21 11:23:54,352 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-21 11:23:54,352 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:23:54,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-21 11:23:54,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-09-21 11:23:54,353 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 9 states. [2020-09-21 11:23:54,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:23:54,437 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2020-09-21 11:23:54,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-21 11:23:54,438 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 28 [2020-09-21 11:23:54,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:23:54,439 INFO L225 Difference]: With dead ends: 44 [2020-09-21 11:23:54,439 INFO L226 Difference]: Without dead ends: 32 [2020-09-21 11:23:54,440 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-09-21 11:23:54,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-09-21 11:23:54,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2020-09-21 11:23:54,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-09-21 11:23:54,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2020-09-21 11:23:54,446 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 28 [2020-09-21 11:23:54,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:23:54,447 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2020-09-21 11:23:54,447 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-21 11:23:54,447 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2020-09-21 11:23:54,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-21 11:23:54,448 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:23:54,448 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:23:54,449 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-21 11:23:54,449 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:23:54,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:23:54,449 INFO L82 PathProgramCache]: Analyzing trace with hash 2147351063, now seen corresponding path program 6 times [2020-09-21 11:23:54,450 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:23:54,450 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [129224522] [2020-09-21 11:23:54,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:23:54,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:54,494 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:54,494 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:54,495 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:54,495 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:54,495 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-09-21 11:23:54,495 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:54,496 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-09-21 11:23:54,496 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:54,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-21 11:23:54,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 11:23:54,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-09-21 11:23:54,497 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:23:54,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:23:54,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:54,595 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:54,595 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:54,595 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:54,596 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:54,596 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:23:54,596 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:54,596 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:23:54,597 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:54,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:23:54,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:23:54,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:23:54,598 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:23:54,600 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-09-21 11:23:54,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:54,603 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:54,603 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:54,604 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:54,604 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:54,604 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:23:54,604 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:54,605 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:23:54,605 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:54,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:23:54,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-09-21 11:23:54,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:23:54,606 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:23:54,611 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:23:54,612 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [129224522] [2020-09-21 11:23:54,612 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:23:54,612 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-21 11:23:54,612 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746087645] [2020-09-21 11:23:54,613 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-21 11:23:54,613 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:23:54,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-21 11:23:54,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-09-21 11:23:54,614 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand 10 states. [2020-09-21 11:23:54,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:23:54,704 INFO L93 Difference]: Finished difference Result 46 states and 48 transitions. [2020-09-21 11:23:54,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-21 11:23:54,705 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 30 [2020-09-21 11:23:54,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:23:54,706 INFO L225 Difference]: With dead ends: 46 [2020-09-21 11:23:54,706 INFO L226 Difference]: Without dead ends: 34 [2020-09-21 11:23:54,707 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-09-21 11:23:54,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-09-21 11:23:54,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2020-09-21 11:23:54,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-09-21 11:23:54,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-09-21 11:23:54,712 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 30 [2020-09-21 11:23:54,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:23:54,712 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-09-21 11:23:54,712 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-21 11:23:54,712 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-09-21 11:23:54,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-21 11:23:54,713 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:23:54,713 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:23:54,713 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-21 11:23:54,714 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:23:54,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:23:54,714 INFO L82 PathProgramCache]: Analyzing trace with hash -133817927, now seen corresponding path program 7 times [2020-09-21 11:23:54,714 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:23:54,715 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2133581174] [2020-09-21 11:23:54,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:23:54,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:54,756 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:54,756 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:54,757 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:54,757 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:54,757 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-09-21 11:23:54,757 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:54,757 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-09-21 11:23:54,758 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:54,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-21 11:23:54,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 11:23:54,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-21 11:23:54,758 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:23:54,850 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:23:54,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:54,852 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:54,852 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:54,852 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:54,852 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:54,852 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:23:54,853 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:54,853 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:23:54,853 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:54,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:23:54,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:23:54,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:23:54,854 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:23:54,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-09-21 11:23:54,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:54,858 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:54,859 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:54,859 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:54,859 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:54,859 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:23:54,859 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:54,860 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:23:54,860 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:54,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:23:54,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-09-21 11:23:54,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:23:54,861 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:23:54,864 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:23:54,865 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2133581174] [2020-09-21 11:23:54,865 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:23:54,865 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-21 11:23:54,865 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509690747] [2020-09-21 11:23:54,866 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-21 11:23:54,866 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:23:54,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-21 11:23:54,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-09-21 11:23:54,867 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 11 states. [2020-09-21 11:23:54,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:23:54,948 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2020-09-21 11:23:54,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-21 11:23:54,948 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 32 [2020-09-21 11:23:54,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:23:54,949 INFO L225 Difference]: With dead ends: 48 [2020-09-21 11:23:54,949 INFO L226 Difference]: Without dead ends: 36 [2020-09-21 11:23:54,950 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-09-21 11:23:54,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-09-21 11:23:54,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2020-09-21 11:23:54,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-09-21 11:23:54,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2020-09-21 11:23:54,955 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 32 [2020-09-21 11:23:54,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:23:54,956 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2020-09-21 11:23:54,956 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-21 11:23:54,956 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2020-09-21 11:23:54,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-09-21 11:23:54,957 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:23:54,957 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:23:54,957 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-21 11:23:54,957 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:23:54,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:23:54,958 INFO L82 PathProgramCache]: Analyzing trace with hash -1903896357, now seen corresponding path program 8 times [2020-09-21 11:23:54,958 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:23:54,958 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1475125321] [2020-09-21 11:23:54,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:23:54,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:55,028 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:55,028 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:55,028 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:55,028 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:55,028 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-09-21 11:23:55,029 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:55,029 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 39 [2020-09-21 11:23:55,029 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:55,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-21 11:23:55,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 11:23:55,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-21 11:23:55,030 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:23:55,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:23:55,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:55,144 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:55,144 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:55,144 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:55,145 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:55,145 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:23:55,145 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:55,145 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:23:55,145 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:55,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:23:55,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:23:55,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:23:55,146 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:23:55,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-09-21 11:23:55,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:55,151 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:55,151 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:55,152 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:55,152 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:55,152 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:23:55,152 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:55,153 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:23:55,153 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:55,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:23:55,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-09-21 11:23:55,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:23:55,153 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:23:55,158 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:23:55,158 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1475125321] [2020-09-21 11:23:55,158 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:23:55,159 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-21 11:23:55,159 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106304395] [2020-09-21 11:23:55,159 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-21 11:23:55,159 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:23:55,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-21 11:23:55,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-09-21 11:23:55,160 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand 12 states. [2020-09-21 11:23:55,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:23:55,228 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2020-09-21 11:23:55,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-21 11:23:55,228 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 34 [2020-09-21 11:23:55,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:23:55,229 INFO L225 Difference]: With dead ends: 50 [2020-09-21 11:23:55,230 INFO L226 Difference]: Without dead ends: 38 [2020-09-21 11:23:55,230 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-09-21 11:23:55,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-09-21 11:23:55,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2020-09-21 11:23:55,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-09-21 11:23:55,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2020-09-21 11:23:55,235 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 34 [2020-09-21 11:23:55,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:23:55,235 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2020-09-21 11:23:55,235 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-21 11:23:55,235 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2020-09-21 11:23:55,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-09-21 11:23:55,236 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:23:55,236 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:23:55,237 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-21 11:23:55,237 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:23:55,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:23:55,237 INFO L82 PathProgramCache]: Analyzing trace with hash -2142218371, now seen corresponding path program 9 times [2020-09-21 11:23:55,237 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:23:55,238 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [394027479] [2020-09-21 11:23:55,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:23:55,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:55,281 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:55,282 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:55,282 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:55,282 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:55,283 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-09-21 11:23:55,283 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:55,283 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-09-21 11:23:55,284 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:55,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-09-21 11:23:55,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 11:23:55,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-09-21 11:23:55,285 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:23:55,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:23:55,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:55,400 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:55,400 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:55,400 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:55,401 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:55,401 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:23:55,401 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:55,401 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:23:55,401 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:55,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:23:55,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:23:55,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:23:55,402 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:23:55,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-09-21 11:23:55,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:55,406 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:55,406 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:55,407 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:55,407 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:55,407 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:23:55,407 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:55,408 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:23:55,408 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:55,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:23:55,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-09-21 11:23:55,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:23:55,408 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:23:55,412 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:23:55,412 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [394027479] [2020-09-21 11:23:55,413 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:23:55,413 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-21 11:23:55,413 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590361796] [2020-09-21 11:23:55,414 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-21 11:23:55,414 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:23:55,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-21 11:23:55,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-09-21 11:23:55,415 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand 13 states. [2020-09-21 11:23:55,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:23:55,507 INFO L93 Difference]: Finished difference Result 52 states and 54 transitions. [2020-09-21 11:23:55,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-21 11:23:55,508 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 36 [2020-09-21 11:23:55,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:23:55,509 INFO L225 Difference]: With dead ends: 52 [2020-09-21 11:23:55,509 INFO L226 Difference]: Without dead ends: 40 [2020-09-21 11:23:55,509 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-09-21 11:23:55,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-09-21 11:23:55,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2020-09-21 11:23:55,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-09-21 11:23:55,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2020-09-21 11:23:55,514 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 36 [2020-09-21 11:23:55,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:23:55,515 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2020-09-21 11:23:55,515 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-21 11:23:55,515 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2020-09-21 11:23:55,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-09-21 11:23:55,516 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:23:55,516 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:23:55,516 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-21 11:23:55,517 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:23:55,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:23:55,517 INFO L82 PathProgramCache]: Analyzing trace with hash 758560159, now seen corresponding path program 10 times [2020-09-21 11:23:55,517 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:23:55,518 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1152040479] [2020-09-21 11:23:55,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:23:55,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:55,571 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:55,571 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:55,572 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:55,572 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:55,572 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-09-21 11:23:55,572 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:55,572 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-09-21 11:23:55,573 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:55,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-21 11:23:55,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 11:23:55,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-09-21 11:23:55,573 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:23:55,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:23:55,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:55,705 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:55,706 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:55,706 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:55,706 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:55,706 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:23:55,706 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:55,707 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:23:55,707 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:55,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:23:55,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:23:55,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:23:55,707 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:23:55,710 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-09-21 11:23:55,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:55,712 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:55,712 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:55,712 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:55,713 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:55,713 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:23:55,713 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:55,713 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:23:55,713 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:55,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:23:55,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-09-21 11:23:55,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:23:55,714 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:23:55,718 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:23:55,718 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1152040479] [2020-09-21 11:23:55,719 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:23:55,719 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-09-21 11:23:55,719 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054526021] [2020-09-21 11:23:55,720 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-21 11:23:55,720 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:23:55,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-21 11:23:55,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-09-21 11:23:55,720 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand 14 states. [2020-09-21 11:23:55,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:23:55,816 INFO L93 Difference]: Finished difference Result 54 states and 56 transitions. [2020-09-21 11:23:55,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-21 11:23:55,817 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 38 [2020-09-21 11:23:55,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:23:55,818 INFO L225 Difference]: With dead ends: 54 [2020-09-21 11:23:55,818 INFO L226 Difference]: Without dead ends: 42 [2020-09-21 11:23:55,819 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-09-21 11:23:55,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-09-21 11:23:55,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2020-09-21 11:23:55,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-09-21 11:23:55,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2020-09-21 11:23:55,823 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 38 [2020-09-21 11:23:55,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:23:55,824 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2020-09-21 11:23:55,824 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-21 11:23:55,824 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2020-09-21 11:23:55,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-09-21 11:23:55,825 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:23:55,825 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:23:55,825 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-21 11:23:55,825 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:23:55,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:23:55,826 INFO L82 PathProgramCache]: Analyzing trace with hash 972952385, now seen corresponding path program 11 times [2020-09-21 11:23:55,826 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:23:55,826 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1266641881] [2020-09-21 11:23:55,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:23:55,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:55,887 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:55,888 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:55,888 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:55,888 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:55,888 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-09-21 11:23:55,888 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:55,889 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 36 [2020-09-21 11:23:55,889 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:55,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-09-21 11:23:55,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 11:23:55,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-09-21 11:23:55,889 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:23:56,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:23:56,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:56,041 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:56,042 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:56,042 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:56,042 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:56,042 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:23:56,042 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:56,042 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:23:56,043 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:56,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:23:56,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:23:56,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:23:56,043 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:23:56,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-09-21 11:23:56,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:56,051 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:56,051 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:56,051 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:56,051 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:56,051 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:23:56,052 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:56,052 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:23:56,052 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:56,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:23:56,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-09-21 11:23:56,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:23:56,053 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:23:56,058 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:23:56,059 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1266641881] [2020-09-21 11:23:56,059 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:23:56,059 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-09-21 11:23:56,059 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594364996] [2020-09-21 11:23:56,061 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-21 11:23:56,061 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:23:56,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-21 11:23:56,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-09-21 11:23:56,062 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand 15 states. [2020-09-21 11:23:56,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:23:56,175 INFO L93 Difference]: Finished difference Result 56 states and 58 transitions. [2020-09-21 11:23:56,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-21 11:23:56,176 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 40 [2020-09-21 11:23:56,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:23:56,177 INFO L225 Difference]: With dead ends: 56 [2020-09-21 11:23:56,177 INFO L226 Difference]: Without dead ends: 44 [2020-09-21 11:23:56,178 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-09-21 11:23:56,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-09-21 11:23:56,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2020-09-21 11:23:56,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-09-21 11:23:56,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2020-09-21 11:23:56,191 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 40 [2020-09-21 11:23:56,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:23:56,191 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2020-09-21 11:23:56,191 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-21 11:23:56,191 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2020-09-21 11:23:56,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-09-21 11:23:56,192 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:23:56,193 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:23:56,193 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-09-21 11:23:56,193 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:23:56,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:23:56,198 INFO L82 PathProgramCache]: Analyzing trace with hash 845451363, now seen corresponding path program 12 times [2020-09-21 11:23:56,198 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:23:56,198 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2126927423] [2020-09-21 11:23:56,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:23:56,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:56,339 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:56,340 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:56,340 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:56,340 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:56,340 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-09-21 11:23:56,341 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:56,341 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 99 [2020-09-21 11:23:56,341 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:56,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-09-21 11:23:56,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 11:23:56,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-09-21 11:23:56,342 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:23:56,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:23:56,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:56,520 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:56,520 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:56,520 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:56,520 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:56,521 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:23:56,521 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:56,521 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:23:56,521 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:56,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:23:56,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:23:56,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:23:56,522 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:23:56,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-09-21 11:23:56,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:56,527 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:56,527 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:56,527 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:56,528 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:56,528 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:23:56,528 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:56,528 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:23:56,529 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:56,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:23:56,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-09-21 11:23:56,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:23:56,530 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:23:56,535 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:23:56,535 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2126927423] [2020-09-21 11:23:56,536 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:23:56,536 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-09-21 11:23:56,536 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192204462] [2020-09-21 11:23:56,536 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-21 11:23:56,537 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:23:56,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-21 11:23:56,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-09-21 11:23:56,537 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand 16 states. [2020-09-21 11:23:56,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:23:56,631 INFO L93 Difference]: Finished difference Result 58 states and 60 transitions. [2020-09-21 11:23:56,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-21 11:23:56,631 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 42 [2020-09-21 11:23:56,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:23:56,632 INFO L225 Difference]: With dead ends: 58 [2020-09-21 11:23:56,632 INFO L226 Difference]: Without dead ends: 46 [2020-09-21 11:23:56,633 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-09-21 11:23:56,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-09-21 11:23:56,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2020-09-21 11:23:56,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-09-21 11:23:56,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-09-21 11:23:56,643 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 42 [2020-09-21 11:23:56,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:23:56,643 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-09-21 11:23:56,643 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-21 11:23:56,643 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-09-21 11:23:56,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-09-21 11:23:56,644 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:23:56,644 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:23:56,644 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-09-21 11:23:56,645 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:23:56,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:23:56,647 INFO L82 PathProgramCache]: Analyzing trace with hash -1423946491, now seen corresponding path program 13 times [2020-09-21 11:23:56,648 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:23:56,648 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1149614377] [2020-09-21 11:23:56,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:23:56,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:56,750 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:56,751 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:56,751 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:56,751 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:56,751 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-09-21 11:23:56,752 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:56,752 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 49 [2020-09-21 11:23:56,752 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:56,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-09-21 11:23:56,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 11:23:56,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-09-21 11:23:56,753 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:23:56,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:23:56,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:56,946 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:56,946 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:56,946 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:56,946 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:56,946 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:23:56,947 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:56,947 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:23:56,947 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:56,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:23:56,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:23:56,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:23:56,948 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:23:56,951 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-09-21 11:23:56,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:56,954 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:56,954 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:56,954 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:56,954 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:56,954 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:23:56,955 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:56,955 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:23:56,955 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:56,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:23:56,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-09-21 11:23:56,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:23:56,956 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:23:56,961 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:23:56,962 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1149614377] [2020-09-21 11:23:56,962 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:23:56,962 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-09-21 11:23:56,963 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22612811] [2020-09-21 11:23:56,964 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-21 11:23:56,964 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:23:56,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-21 11:23:56,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-09-21 11:23:56,965 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 17 states. [2020-09-21 11:23:57,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:23:57,075 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2020-09-21 11:23:57,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-21 11:23:57,076 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 44 [2020-09-21 11:23:57,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:23:57,077 INFO L225 Difference]: With dead ends: 60 [2020-09-21 11:23:57,077 INFO L226 Difference]: Without dead ends: 48 [2020-09-21 11:23:57,077 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-09-21 11:23:57,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-09-21 11:23:57,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2020-09-21 11:23:57,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-09-21 11:23:57,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2020-09-21 11:23:57,085 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 44 [2020-09-21 11:23:57,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:23:57,086 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2020-09-21 11:23:57,086 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-21 11:23:57,086 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2020-09-21 11:23:57,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-09-21 11:23:57,087 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:23:57,087 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:23:57,087 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-09-21 11:23:57,087 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:23:57,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:23:57,088 INFO L82 PathProgramCache]: Analyzing trace with hash -471897817, now seen corresponding path program 14 times [2020-09-21 11:23:57,088 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:23:57,088 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1027969376] [2020-09-21 11:23:57,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:23:57,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:57,162 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:57,162 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:57,162 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:57,163 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:57,163 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-09-21 11:23:57,163 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:57,163 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 46 [2020-09-21 11:23:57,164 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:57,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-09-21 11:23:57,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 11:23:57,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-09-21 11:23:57,164 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:23:57,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:23:57,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:57,388 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:57,388 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:57,388 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:57,389 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:57,389 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:23:57,389 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:57,389 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:23:57,389 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:57,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:23:57,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:23:57,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:23:57,390 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:23:57,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-09-21 11:23:57,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:57,395 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:57,395 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:57,396 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:57,396 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:57,396 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:23:57,396 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:57,396 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:23:57,397 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:57,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:23:57,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-09-21 11:23:57,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:23:57,397 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:23:57,402 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:23:57,402 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1027969376] [2020-09-21 11:23:57,403 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:23:57,403 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-09-21 11:23:57,403 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151800568] [2020-09-21 11:23:57,403 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-21 11:23:57,404 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:23:57,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-21 11:23:57,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-09-21 11:23:57,404 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand 18 states. [2020-09-21 11:23:57,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:23:57,532 INFO L93 Difference]: Finished difference Result 62 states and 64 transitions. [2020-09-21 11:23:57,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-21 11:23:57,533 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 46 [2020-09-21 11:23:57,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:23:57,534 INFO L225 Difference]: With dead ends: 62 [2020-09-21 11:23:57,534 INFO L226 Difference]: Without dead ends: 50 [2020-09-21 11:23:57,535 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-09-21 11:23:57,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-09-21 11:23:57,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2020-09-21 11:23:57,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-09-21 11:23:57,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2020-09-21 11:23:57,544 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 46 [2020-09-21 11:23:57,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:23:57,545 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2020-09-21 11:23:57,546 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-21 11:23:57,546 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2020-09-21 11:23:57,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-09-21 11:23:57,547 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:23:57,547 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:23:57,547 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-09-21 11:23:57,547 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:23:57,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:23:57,548 INFO L82 PathProgramCache]: Analyzing trace with hash -381156151, now seen corresponding path program 15 times [2020-09-21 11:23:57,548 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:23:57,548 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1155862770] [2020-09-21 11:23:57,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:23:57,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:57,636 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:57,636 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:57,637 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:57,637 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:57,637 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-09-21 11:23:57,637 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:57,637 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 56 [2020-09-21 11:23:57,638 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:57,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-09-21 11:23:57,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 11:23:57,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-09-21 11:23:57,638 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:23:57,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:23:57,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:57,889 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:57,889 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:57,889 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:57,890 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:57,890 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:23:57,890 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:57,890 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:23:57,890 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:57,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:23:57,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:23:57,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:23:57,891 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:23:57,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-09-21 11:23:57,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:57,895 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:57,895 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:57,895 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:57,896 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:57,896 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:23:57,896 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:57,896 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:23:57,896 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:57,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:23:57,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-09-21 11:23:57,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:23:57,897 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:23:57,904 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:23:57,904 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1155862770] [2020-09-21 11:23:57,904 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:23:57,904 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-09-21 11:23:57,905 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531585933] [2020-09-21 11:23:57,905 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-21 11:23:57,906 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:23:57,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-21 11:23:57,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-09-21 11:23:57,906 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand 19 states. [2020-09-21 11:23:58,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:23:58,003 INFO L93 Difference]: Finished difference Result 64 states and 66 transitions. [2020-09-21 11:23:58,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-21 11:23:58,003 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 48 [2020-09-21 11:23:58,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:23:58,004 INFO L225 Difference]: With dead ends: 64 [2020-09-21 11:23:58,004 INFO L226 Difference]: Without dead ends: 52 [2020-09-21 11:23:58,005 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-09-21 11:23:58,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-09-21 11:23:58,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2020-09-21 11:23:58,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-09-21 11:23:58,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2020-09-21 11:23:58,011 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 48 [2020-09-21 11:23:58,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:23:58,012 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2020-09-21 11:23:58,012 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-21 11:23:58,012 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2020-09-21 11:23:58,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-09-21 11:23:58,012 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:23:58,013 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:23:58,013 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-09-21 11:23:58,013 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:23:58,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:23:58,014 INFO L82 PathProgramCache]: Analyzing trace with hash 922238955, now seen corresponding path program 16 times [2020-09-21 11:23:58,014 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:23:58,014 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1738417162] [2020-09-21 11:23:58,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:23:58,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:58,138 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:58,138 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:58,139 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:58,139 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:58,139 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-09-21 11:23:58,139 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:58,139 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 83 [2020-09-21 11:23:58,140 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:58,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-09-21 11:23:58,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 11:23:58,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-09-21 11:23:58,140 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:23:58,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:23:58,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:58,402 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:58,402 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:58,403 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:58,403 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:58,403 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:23:58,403 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:58,404 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:23:58,404 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:58,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:23:58,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:23:58,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:23:58,404 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:23:58,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-09-21 11:23:58,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:58,409 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:58,409 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:58,410 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:58,410 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:58,410 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:23:58,410 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:58,410 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:23:58,411 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:58,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:23:58,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-09-21 11:23:58,411 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:23:58,411 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:23:58,416 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:23:58,417 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1738417162] [2020-09-21 11:23:58,431 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:23:58,432 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-09-21 11:23:58,432 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381088870] [2020-09-21 11:23:58,434 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-21 11:23:58,434 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:23:58,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-21 11:23:58,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-09-21 11:23:58,440 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 20 states. [2020-09-21 11:23:58,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:23:58,542 INFO L93 Difference]: Finished difference Result 66 states and 68 transitions. [2020-09-21 11:23:58,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-21 11:23:58,543 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 50 [2020-09-21 11:23:58,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:23:58,544 INFO L225 Difference]: With dead ends: 66 [2020-09-21 11:23:58,544 INFO L226 Difference]: Without dead ends: 54 [2020-09-21 11:23:58,545 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-09-21 11:23:58,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-09-21 11:23:58,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2020-09-21 11:23:58,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-09-21 11:23:58,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2020-09-21 11:23:58,553 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 50 [2020-09-21 11:23:58,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:23:58,556 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2020-09-21 11:23:58,556 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-21 11:23:58,557 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2020-09-21 11:23:58,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-09-21 11:23:58,557 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:23:58,557 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:23:58,558 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-09-21 11:23:58,558 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:23:58,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:23:58,558 INFO L82 PathProgramCache]: Analyzing trace with hash -645514611, now seen corresponding path program 17 times [2020-09-21 11:23:58,558 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:23:58,562 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [949765203] [2020-09-21 11:23:58,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:23:58,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:58,675 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:58,675 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:58,675 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:58,675 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:58,675 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-09-21 11:23:58,676 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:58,676 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 81 [2020-09-21 11:23:58,676 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:58,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-09-21 11:23:58,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 11:23:58,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-09-21 11:23:58,677 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:23:58,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:23:58,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:58,958 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:58,958 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:58,958 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:58,959 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:58,959 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:23:58,959 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:58,959 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:23:58,959 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:58,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:23:58,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:23:58,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:23:58,960 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:23:58,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-09-21 11:23:58,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:58,963 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:58,963 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:58,964 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:58,964 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:58,964 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:23:58,964 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:58,964 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-09-21 11:23:58,964 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:58,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:23:58,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-09-21 11:23:58,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:23:58,965 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:23:58,970 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:23:58,970 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [949765203] [2020-09-21 11:23:58,970 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:23:58,971 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-09-21 11:23:58,971 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440065259] [2020-09-21 11:23:58,971 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-21 11:23:58,971 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:23:58,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-21 11:23:58,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-09-21 11:23:58,972 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand 21 states. [2020-09-21 11:23:59,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:23:59,125 INFO L93 Difference]: Finished difference Result 68 states and 70 transitions. [2020-09-21 11:23:59,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-21 11:23:59,126 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 52 [2020-09-21 11:23:59,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:23:59,127 INFO L225 Difference]: With dead ends: 68 [2020-09-21 11:23:59,127 INFO L226 Difference]: Without dead ends: 56 [2020-09-21 11:23:59,128 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-09-21 11:23:59,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-09-21 11:23:59,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2020-09-21 11:23:59,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-09-21 11:23:59,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2020-09-21 11:23:59,136 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 52 [2020-09-21 11:23:59,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:23:59,136 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2020-09-21 11:23:59,136 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-21 11:23:59,136 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2020-09-21 11:23:59,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-09-21 11:23:59,137 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:23:59,137 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:23:59,137 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-09-21 11:23:59,137 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:23:59,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:23:59,138 INFO L82 PathProgramCache]: Analyzing trace with hash 276829359, now seen corresponding path program 18 times [2020-09-21 11:23:59,138 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:23:59,138 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [674823045] [2020-09-21 11:23:59,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:23:59,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:59,252 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:59,253 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:59,253 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:59,253 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:59,254 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-09-21 11:23:59,254 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:59,255 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 76 [2020-09-21 11:23:59,256 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:59,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-09-21 11:23:59,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 11:23:59,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-09-21 11:23:59,257 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:23:59,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:23:59,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:59,576 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:59,576 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:59,576 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:59,577 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:59,577 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:23:59,577 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:59,577 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-21 11:23:59,578 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:59,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:23:59,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:23:59,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:23:59,579 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:23:59,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-09-21 11:23:59,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:59,584 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:59,584 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:59,584 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:59,585 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:59,585 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:23:59,585 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:59,586 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:23:59,586 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:59,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:23:59,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-09-21 11:23:59,587 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:23:59,587 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-21 11:23:59,595 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:23:59,595 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [674823045] [2020-09-21 11:23:59,595 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:23:59,596 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-09-21 11:23:59,596 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078486354] [2020-09-21 11:23:59,596 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-21 11:23:59,596 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:23:59,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-21 11:23:59,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-09-21 11:23:59,597 INFO L87 Difference]: Start difference. First operand 55 states and 56 transitions. Second operand 22 states. [2020-09-21 11:23:59,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:23:59,714 INFO L93 Difference]: Finished difference Result 70 states and 72 transitions. [2020-09-21 11:23:59,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-21 11:23:59,715 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 54 [2020-09-21 11:23:59,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:23:59,716 INFO L225 Difference]: With dead ends: 70 [2020-09-21 11:23:59,716 INFO L226 Difference]: Without dead ends: 58 [2020-09-21 11:23:59,716 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-09-21 11:23:59,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-09-21 11:23:59,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2020-09-21 11:23:59,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-21 11:23:59,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2020-09-21 11:23:59,720 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 54 [2020-09-21 11:23:59,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:23:59,721 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2020-09-21 11:23:59,722 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-21 11:23:59,722 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2020-09-21 11:23:59,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-09-21 11:23:59,722 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:23:59,722 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:23:59,723 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-09-21 11:23:59,723 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:23:59,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:23:59,723 INFO L82 PathProgramCache]: Analyzing trace with hash 1886121553, now seen corresponding path program 19 times [2020-09-21 11:23:59,724 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:23:59,724 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [251778110] [2020-09-21 11:23:59,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:23:59,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:23:59,829 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:23:59,829 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:23:59,830 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:23:59,830 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:23:59,830 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-09-21 11:23:59,830 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:23:59,830 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 76 [2020-09-21 11:23:59,831 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:23:59,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-09-21 11:23:59,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-21 11:23:59,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-09-21 11:23:59,831 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:24:00,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-21 11:24:00,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:24:00,148 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:24:00,148 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:24:00,148 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:24:00,148 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:24:00,148 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:24:00,150 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:24:00,150 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:24:00,151 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:24:00,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:24:00,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-21 11:24:00,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:24:00,151 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:24:00,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-09-21 11:24:00,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-21 11:24:00,157 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-21 11:24:00,157 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-21 11:24:00,157 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-21 11:24:00,157 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-21 11:24:00,158 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-09-21 11:24:00,158 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-21 11:24:00,158 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-21 11:24:00,158 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-21 11:24:00,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-21 11:24:00,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-09-21 11:24:00,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-21 11:24:00,159 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-21 11:24:00,164 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-21 11:24:00,165 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [251778110] [2020-09-21 11:24:00,165 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-21 11:24:00,165 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-09-21 11:24:00,165 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996088195] [2020-09-21 11:24:00,167 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-21 11:24:00,168 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-21 11:24:00,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-21 11:24:00,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-09-21 11:24:00,168 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand 23 states. [2020-09-21 11:24:00,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-21 11:24:00,347 INFO L93 Difference]: Finished difference Result 71 states and 73 transitions. [2020-09-21 11:24:00,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-21 11:24:00,348 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 56 [2020-09-21 11:24:00,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-21 11:24:00,349 INFO L225 Difference]: With dead ends: 71 [2020-09-21 11:24:00,349 INFO L226 Difference]: Without dead ends: 59 [2020-09-21 11:24:00,350 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-09-21 11:24:00,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-09-21 11:24:00,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2020-09-21 11:24:00,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-09-21 11:24:00,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2020-09-21 11:24:00,357 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 56 [2020-09-21 11:24:00,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-21 11:24:00,357 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2020-09-21 11:24:00,358 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-21 11:24:00,358 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2020-09-21 11:24:00,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-09-21 11:24:00,358 INFO L414 BasicCegarLoop]: Found error trace [2020-09-21 11:24:00,358 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-21 11:24:00,359 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-09-21 11:24:00,359 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-21 11:24:00,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-21 11:24:00,359 INFO L82 PathProgramCache]: Analyzing trace with hash -2067273869, now seen corresponding path program 20 times [2020-09-21 11:24:00,359 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-21 11:24:00,363 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1252516374] [2020-09-21 11:24:00,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-21 11:24:00,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-09-21 11:24:00,486 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-09-21 11:24:00,486 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-09-21 11:24:00,493 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-09-21 11:24:00,532 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.09 11:24:00 BoogieIcfgContainer [2020-09-21 11:24:00,532 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-21 11:24:00,541 INFO L168 Benchmark]: Toolchain (without parser) took 8903.06 ms. Allocated memory was 140.5 MB in the beginning and 307.2 MB in the end (delta: 166.7 MB). Free memory was 103.7 MB in the beginning and 156.1 MB in the end (delta: -52.3 MB). Peak memory consumption was 114.4 MB. Max. memory is 7.1 GB. [2020-09-21 11:24:00,548 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 140.5 MB. Free memory was 122.1 MB in the beginning and 121.6 MB in the end (delta: 419.7 kB). Peak memory consumption was 419.7 kB. Max. memory is 7.1 GB. [2020-09-21 11:24:00,549 INFO L168 Benchmark]: CACSL2BoogieTranslator took 333.83 ms. Allocated memory is still 140.5 MB. Free memory was 103.2 MB in the beginning and 92.9 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. [2020-09-21 11:24:00,549 INFO L168 Benchmark]: Boogie Preprocessor took 126.99 ms. Allocated memory was 140.5 MB in the beginning and 203.4 MB in the end (delta: 62.9 MB). Free memory was 92.9 MB in the beginning and 181.3 MB in the end (delta: -88.4 MB). Peak memory consumption was 12.1 MB. Max. memory is 7.1 GB. [2020-09-21 11:24:00,550 INFO L168 Benchmark]: RCFGBuilder took 401.25 ms. Allocated memory is still 203.4 MB. Free memory was 180.9 MB in the beginning and 165.5 MB in the end (delta: 15.4 MB). Peak memory consumption was 15.4 MB. Max. memory is 7.1 GB. [2020-09-21 11:24:00,550 INFO L168 Benchmark]: TraceAbstraction took 8031.86 ms. Allocated memory was 203.4 MB in the beginning and 307.2 MB in the end (delta: 103.8 MB). Free memory was 164.5 MB in the beginning and 156.1 MB in the end (delta: 8.5 MB). Peak memory consumption was 112.3 MB. Max. memory is 7.1 GB. [2020-09-21 11:24:00,555 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 140.5 MB. Free memory was 122.1 MB in the beginning and 121.6 MB in the end (delta: 419.7 kB). Peak memory consumption was 419.7 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 333.83 ms. Allocated memory is still 140.5 MB. Free memory was 103.2 MB in the beginning and 92.9 MB in the end (delta: 10.3 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 126.99 ms. Allocated memory was 140.5 MB in the beginning and 203.4 MB in the end (delta: 62.9 MB). Free memory was 92.9 MB in the beginning and 181.3 MB in the end (delta: -88.4 MB). Peak memory consumption was 12.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 401.25 ms. Allocated memory is still 203.4 MB. Free memory was 180.9 MB in the beginning and 165.5 MB in the end (delta: 15.4 MB). Peak memory consumption was 15.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 8031.86 ms. Allocated memory was 203.4 MB in the beginning and 307.2 MB in the end (delta: 103.8 MB). Free memory was 164.5 MB in the beginning and 156.1 MB in the end (delta: 8.5 MB). Peak memory consumption was 112.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 37]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L15] struct dummy ad1[20], *ad2; [L16] int i, j, *pa; [L17] j=0 [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND TRUE j<20 [L18] ad1[j].a = __VERIFIER_nondet_int() [L19] ad1[j].b = __VERIFIER_nondet_int() [L17] j++ [L17] COND FALSE !(j<20) [L21] i = __VERIFIER_nondet_int() [L22] COND TRUE i >= 0 && i < 10 [L23] ad2 = ad1 [L24] ad1[i].a = i [L25] pa = &ad1[i].a [L26] EXPR ad2[i].a [L26] i = ad2[i].a + 10 [L27] EXPR \read(*pa) [L27] COND FALSE !(i < *pa) [L30] CALL, EXPR check(ad1, i) [L10] EXPR ad1[b].a [L10] return ad1[b].a == b; [L30] RET, EXPR check(ad1, i) [L30] COND TRUE !check(ad1, i) [L37] __VERIFIER_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 25 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 7.9s, OverallIterations: 22, TraceHistogramMax: 20, AutomataDifference: 2.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 365 SDtfs, 252 SDslu, 1934 SDs, 0 SdLazy, 1339 SolverSat, 72 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 336 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 231 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 2.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=59occurred in iteration=21, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 21 MinimizatonAttempts, 19 StatesRemovedByMinimization, 19 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 4.4s InterpolantComputationTime, 815 NumberOfCodeBlocks, 815 NumberOfCodeBlocksAsserted, 22 NumberOfCheckSat, 736 ConstructedInterpolants, 0 QuantifiedInterpolants, 69580 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 21 InterpolantComputations, 2 PerfectInterpolantSequences, 0/2470 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...