/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration 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/loop-acceleration/simple_4-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 16:10:39,934 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 16:10:39,938 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 16:10:39,967 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 16:10:39,968 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 16:10:39,977 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 16:10:39,980 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 16:10:39,984 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 16:10:39,986 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 16:10:39,990 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 16:10:39,991 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 16:10:39,993 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 16:10:39,993 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 16:10:39,996 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 16:10:39,999 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 16:10:40,001 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 16:10:40,003 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 16:10:40,005 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 16:10:40,007 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 16:10:40,015 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 16:10:40,018 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 16:10:40,019 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 16:10:40,020 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 16:10:40,021 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 16:10:40,038 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 16:10:40,038 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 16:10:40,039 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 16:10:40,043 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 16:10:40,044 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 16:10:40,045 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 16:10:40,045 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 16:10:40,048 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 16:10:40,049 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 16:10:40,050 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 16:10:40,054 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 16:10:40,055 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 16:10:40,056 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 16:10:40,056 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 16:10:40,056 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 16:10:40,058 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 16:10:40,059 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 16:10:40,060 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-24 16:10:40,091 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 16:10:40,091 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 16:10:40,092 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 16:10:40,093 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 16:10:40,093 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 16:10:40,093 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 16:10:40,093 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 16:10:40,094 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 16:10:40,094 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 16:10:40,094 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 16:10:40,094 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 16:10:40,094 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 16:10:40,095 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 16:10:40,095 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 16:10:40,095 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 16:10:40,095 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 16:10:40,096 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 16:10:40,096 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 16:10:40,096 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 16:10:40,096 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 16:10:40,096 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 16:10:40,097 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 16:10:40,097 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 16:10:40,097 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 16:10:40,097 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 16:10:40,098 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 16:10:40,098 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 16:10:40,098 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 16:10:40,098 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 16:10:40,098 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SingleStatement Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> 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; [2020-09-24 16:10:40,542 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 16:10:40,560 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 16:10:40,565 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 16:10:40,567 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 16:10:40,567 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 16:10:40,568 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/simple_4-2.c [2020-09-24 16:10:40,657 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5597d7bc0/54f079221c5d41cd86e940fcb74688c4/FLAG4d652d91f [2020-09-24 16:10:41,234 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 16:10:41,236 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-acceleration/simple_4-2.c [2020-09-24 16:10:41,256 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5597d7bc0/54f079221c5d41cd86e940fcb74688c4/FLAG4d652d91f [2020-09-24 16:10:41,577 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5597d7bc0/54f079221c5d41cd86e940fcb74688c4 [2020-09-24 16:10:41,594 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 16:10:41,600 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 16:10:41,604 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 16:10:41,604 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 16:10:41,608 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 16:10:41,609 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 04:10:41" (1/1) ... [2020-09-24 16:10:41,614 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@336c4a18 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:10:41, skipping insertion in model container [2020-09-24 16:10:41,615 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 04:10:41" (1/1) ... [2020-09-24 16:10:41,626 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 16:10:41,649 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 16:10:41,857 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 16:10:41,864 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 16:10:41,880 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 16:10:41,895 INFO L208 MainTranslator]: Completed translation [2020-09-24 16:10:41,895 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:10:41 WrapperNode [2020-09-24 16:10:41,895 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 16:10:41,896 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 16:10:41,896 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 16:10:41,896 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 16:10:41,910 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:10:41" (1/1) ... [2020-09-24 16:10:41,910 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:10:41" (1/1) ... [2020-09-24 16:10:41,991 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:10:41" (1/1) ... [2020-09-24 16:10:41,991 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:10:41" (1/1) ... [2020-09-24 16:10:42,001 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:10:41" (1/1) ... [2020-09-24 16:10:42,008 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:10:41" (1/1) ... [2020-09-24 16:10:42,009 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:10:41" (1/1) ... [2020-09-24 16:10:42,010 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 16:10:42,011 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 16:10:42,011 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 16:10:42,011 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 16:10:42,012 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:10:41" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 16:10:42,101 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 16:10:42,102 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 16:10:42,103 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-24 16:10:42,103 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 16:10:42,104 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 16:10:42,104 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-24 16:10:42,105 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 16:10:42,105 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 16:10:42,106 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 16:10:42,293 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 16:10:42,293 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-24 16:10:42,299 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 04:10:42 BoogieIcfgContainer [2020-09-24 16:10:42,299 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 16:10:42,300 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 16:10:42,300 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 16:10:42,304 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 16:10:42,304 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 04:10:41" (1/3) ... [2020-09-24 16:10:42,306 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f6e8322 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 04:10:42, skipping insertion in model container [2020-09-24 16:10:42,306 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 04:10:41" (2/3) ... [2020-09-24 16:10:42,306 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f6e8322 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 04:10:42, skipping insertion in model container [2020-09-24 16:10:42,307 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 04:10:42" (3/3) ... [2020-09-24 16:10:42,309 INFO L109 eAbstractionObserver]: Analyzing ICFG simple_4-2.c [2020-09-24 16:10:42,321 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 16:10:42,335 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 16:10:42,357 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 16:10:42,388 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 16:10:42,389 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 16:10:42,389 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 16:10:42,389 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 16:10:42,389 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 16:10:42,389 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 16:10:42,390 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 16:10:42,390 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 16:10:42,409 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states. [2020-09-24 16:10:42,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-24 16:10:42,415 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:10:42,416 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:10:42,417 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:10:42,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:10:42,425 INFO L82 PathProgramCache]: Analyzing trace with hash -10373566, now seen corresponding path program 1 times [2020-09-24 16:10:42,434 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:10:42,434 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1964257347] [2020-09-24 16:10:42,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:10:42,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:42,538 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:42,539 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:42,539 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:42,539 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:42,539 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-09-24 16:10:42,539 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:42,540 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-09-24 16:10:42,540 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:42,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:10:42,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 16:10:42,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:10:42,541 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:10:42,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:10:42,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:42,569 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:42,570 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:42,570 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:42,570 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:42,571 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 16:10:42,571 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:42,571 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 16:10:42,571 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:42,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:10:42,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:10:42,572 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:10:42,572 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:10:42,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:10:42,580 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1964257347] [2020-09-24 16:10:42,582 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 16:10:42,582 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-09-24 16:10:42,583 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525373800] [2020-09-24 16:10:42,590 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-09-24 16:10:42,590 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:10:42,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-09-24 16:10:42,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-24 16:10:42,612 INFO L87 Difference]: Start difference. First operand 18 states. Second operand 2 states. [2020-09-24 16:10:42,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:10:42,641 INFO L93 Difference]: Finished difference Result 29 states and 32 transitions. [2020-09-24 16:10:42,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-09-24 16:10:42,643 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2020-09-24 16:10:42,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:10:42,653 INFO L225 Difference]: With dead ends: 29 [2020-09-24 16:10:42,654 INFO L226 Difference]: Without dead ends: 12 [2020-09-24 16:10:42,658 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-24 16:10:42,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2020-09-24 16:10:42,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2020-09-24 16:10:42,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2020-09-24 16:10:42,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2020-09-24 16:10:42,705 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2020-09-24 16:10:42,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:10:42,706 INFO L479 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2020-09-24 16:10:42,706 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-09-24 16:10:42,706 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2020-09-24 16:10:42,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-24 16:10:42,707 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:10:42,707 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:10:42,708 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 16:10:42,708 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:10:42,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:10:42,708 INFO L82 PathProgramCache]: Analyzing trace with hash -14991171, now seen corresponding path program 1 times [2020-09-24 16:10:42,709 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:10:42,709 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1617613617] [2020-09-24 16:10:42,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:10:42,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:42,756 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:42,756 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:42,757 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:42,757 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:42,757 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-09-24 16:10:42,757 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:42,758 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-09-24 16:10:42,758 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:42,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 16:10:42,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 16:10:42,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-09-24 16:10:42,759 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 16:10:42,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:10:42,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:42,845 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:42,845 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:42,845 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:42,846 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:42,846 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 16:10:42,846 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:42,846 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:10:42,847 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:42,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:10:42,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:10:42,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:10:42,848 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 16:10:42,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:10:42,852 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1617613617] [2020-09-24 16:10:42,852 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 16:10:42,852 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-24 16:10:42,853 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567608597] [2020-09-24 16:10:42,855 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-24 16:10:42,855 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:10:42,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-24 16:10:42,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-24 16:10:42,856 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 3 states. [2020-09-24 16:10:42,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:10:42,878 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2020-09-24 16:10:42,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-24 16:10:42,879 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-09-24 16:10:42,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:10:42,880 INFO L225 Difference]: With dead ends: 19 [2020-09-24 16:10:42,880 INFO L226 Difference]: Without dead ends: 14 [2020-09-24 16:10:42,881 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-24 16:10:42,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-09-24 16:10:42,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 13. [2020-09-24 16:10:42,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2020-09-24 16:10:42,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2020-09-24 16:10:42,887 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 10 [2020-09-24 16:10:42,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:10:42,888 INFO L479 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2020-09-24 16:10:42,888 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-24 16:10:42,888 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2020-09-24 16:10:42,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-24 16:10:42,889 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:10:42,890 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:10:42,890 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 16:10:42,890 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:10:42,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:10:42,891 INFO L82 PathProgramCache]: Analyzing trace with hash -355776516, now seen corresponding path program 1 times [2020-09-24 16:10:42,891 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:10:42,891 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1659252961] [2020-09-24 16:10:42,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:10:42,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:42,929 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:42,930 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:42,930 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:42,930 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:42,931 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-09-24 16:10:42,931 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:42,931 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-09-24 16:10:42,932 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:42,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-24 16:10:42,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 16:10:42,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-09-24 16:10:42,933 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 16:10:43,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:10:43,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:43,012 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:43,013 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:43,013 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:43,014 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:43,014 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 16:10:43,014 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:43,015 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 16:10:43,015 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:43,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:10:43,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:10:43,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:10:43,016 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 16:10:43,020 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:10:43,021 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1659252961] [2020-09-24 16:10:43,021 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:10:43,021 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-09-24 16:10:43,022 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133829134] [2020-09-24 16:10:43,022 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-24 16:10:43,022 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:10:43,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-24 16:10:43,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-09-24 16:10:43,023 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand 4 states. [2020-09-24 16:10:43,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:10:43,115 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2020-09-24 16:10:43,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-24 16:10:43,116 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 12 [2020-09-24 16:10:43,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:10:43,117 INFO L225 Difference]: With dead ends: 21 [2020-09-24 16:10:43,117 INFO L226 Difference]: Without dead ends: 16 [2020-09-24 16:10:43,118 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-09-24 16:10:43,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-09-24 16:10:43,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2020-09-24 16:10:43,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2020-09-24 16:10:43,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2020-09-24 16:10:43,124 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 12 [2020-09-24 16:10:43,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:10:43,124 INFO L479 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2020-09-24 16:10:43,124 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-24 16:10:43,124 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2020-09-24 16:10:43,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-24 16:10:43,125 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:10:43,125 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:10:43,126 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 16:10:43,126 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:10:43,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:10:43,127 INFO L82 PathProgramCache]: Analyzing trace with hash -1432978565, now seen corresponding path program 2 times [2020-09-24 16:10:43,127 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:10:43,127 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1098715793] [2020-09-24 16:10:43,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:10:43,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:43,163 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:43,163 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:43,164 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:43,164 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:43,164 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-09-24 16:10:43,165 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:43,170 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-09-24 16:10:43,170 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:43,170 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 16:10:43,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 16:10:43,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-24 16:10:43,171 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 16:10:43,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:10:43,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:43,268 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:43,268 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:43,268 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:43,268 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:43,269 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 16:10:43,269 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:43,269 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:10:43,269 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:43,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:10:43,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:10:43,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:10:43,270 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:10:43,274 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:10:43,274 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1098715793] [2020-09-24 16:10:43,275 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:10:43,275 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-24 16:10:43,275 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752268348] [2020-09-24 16:10:43,276 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 16:10:43,276 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:10:43,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 16:10:43,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-24 16:10:43,277 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand 5 states. [2020-09-24 16:10:43,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:10:43,310 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2020-09-24 16:10:43,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-24 16:10:43,311 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-09-24 16:10:43,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:10:43,312 INFO L225 Difference]: With dead ends: 23 [2020-09-24 16:10:43,312 INFO L226 Difference]: Without dead ends: 18 [2020-09-24 16:10:43,312 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-24 16:10:43,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-09-24 16:10:43,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2020-09-24 16:10:43,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-09-24 16:10:43,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2020-09-24 16:10:43,318 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 14 [2020-09-24 16:10:43,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:10:43,318 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2020-09-24 16:10:43,319 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 16:10:43,319 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2020-09-24 16:10:43,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-24 16:10:43,319 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:10:43,320 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:10:43,320 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 16:10:43,320 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:10:43,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:10:43,321 INFO L82 PathProgramCache]: Analyzing trace with hash -1537029318, now seen corresponding path program 3 times [2020-09-24 16:10:43,321 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:10:43,321 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1002583736] [2020-09-24 16:10:43,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:10:43,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:43,361 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:43,361 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:43,362 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:43,362 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:43,362 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 16:10:43,363 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:43,363 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-09-24 16:10:43,363 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:43,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-24 16:10:43,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 16:10:43,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-24 16:10:43,364 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 16:10:43,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:10:43,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:43,494 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:43,495 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:43,495 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:43,495 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:43,495 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 16:10:43,496 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:43,496 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:10:43,496 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:43,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:10:43,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:10:43,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:10:43,497 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 16:10:43,501 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:10:43,501 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1002583736] [2020-09-24 16:10:43,502 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:10:43,502 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-24 16:10:43,502 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499342294] [2020-09-24 16:10:43,503 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-24 16:10:43,503 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:10:43,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-24 16:10:43,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-09-24 16:10:43,504 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 6 states. [2020-09-24 16:10:43,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:10:43,567 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2020-09-24 16:10:43,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-24 16:10:43,568 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-09-24 16:10:43,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:10:43,569 INFO L225 Difference]: With dead ends: 25 [2020-09-24 16:10:43,570 INFO L226 Difference]: Without dead ends: 20 [2020-09-24 16:10:43,570 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-09-24 16:10:43,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-09-24 16:10:43,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2020-09-24 16:10:43,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-09-24 16:10:43,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2020-09-24 16:10:43,577 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 16 [2020-09-24 16:10:43,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:10:43,577 INFO L479 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2020-09-24 16:10:43,578 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-24 16:10:43,578 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2020-09-24 16:10:43,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-24 16:10:43,579 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:10:43,579 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:10:43,579 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-24 16:10:43,579 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:10:43,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:10:43,580 INFO L82 PathProgramCache]: Analyzing trace with hash 1549412153, now seen corresponding path program 4 times [2020-09-24 16:10:43,580 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:10:43,581 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1209560418] [2020-09-24 16:10:43,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:10:43,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:43,633 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:43,634 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:43,634 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:43,634 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:43,634 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-09-24 16:10:43,635 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:43,635 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-09-24 16:10:43,635 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:43,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 16:10:43,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 16:10:43,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-09-24 16:10:43,636 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:10:43,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:10:43,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:43,778 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:43,779 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:43,779 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:43,779 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:43,779 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 16:10:43,779 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:43,780 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:10:43,780 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:43,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:10:43,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:10:43,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:10:43,781 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:10:43,783 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:10:43,784 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1209560418] [2020-09-24 16:10:43,784 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:10:43,784 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-24 16:10:43,785 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407431620] [2020-09-24 16:10:43,785 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 16:10:43,785 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:10:43,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 16:10:43,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-09-24 16:10:43,786 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 7 states. [2020-09-24 16:10:43,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:10:43,840 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2020-09-24 16:10:43,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-24 16:10:43,841 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 18 [2020-09-24 16:10:43,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:10:43,842 INFO L225 Difference]: With dead ends: 27 [2020-09-24 16:10:43,842 INFO L226 Difference]: Without dead ends: 22 [2020-09-24 16:10:43,843 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-09-24 16:10:43,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-09-24 16:10:43,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2020-09-24 16:10:43,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-09-24 16:10:43,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2020-09-24 16:10:43,849 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 18 [2020-09-24 16:10:43,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:10:43,849 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2020-09-24 16:10:43,850 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-24 16:10:43,850 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2020-09-24 16:10:43,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-24 16:10:43,851 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:10:43,851 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:10:43,851 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-24 16:10:43,851 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:10:43,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:10:43,852 INFO L82 PathProgramCache]: Analyzing trace with hash -202735752, now seen corresponding path program 5 times [2020-09-24 16:10:43,852 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:10:43,852 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1878261099] [2020-09-24 16:10:43,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:10:43,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:43,890 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:43,890 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:43,890 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:43,891 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:43,891 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-09-24 16:10:43,891 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:43,891 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-09-24 16:10:43,892 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:43,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-24 16:10:43,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 16:10:43,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-24 16:10:43,892 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:10:44,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:10:44,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:44,041 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:44,041 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:44,041 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:44,042 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:44,042 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 16:10:44,042 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:44,042 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:10:44,043 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:44,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:10:44,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:10:44,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:10:44,044 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:10:44,047 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:10:44,047 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1878261099] [2020-09-24 16:10:44,047 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:10:44,048 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-24 16:10:44,048 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500523174] [2020-09-24 16:10:44,048 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-24 16:10:44,049 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:10:44,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-24 16:10:44,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-09-24 16:10:44,050 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 8 states. [2020-09-24 16:10:44,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:10:44,123 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2020-09-24 16:10:44,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-24 16:10:44,124 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 20 [2020-09-24 16:10:44,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:10:44,125 INFO L225 Difference]: With dead ends: 29 [2020-09-24 16:10:44,125 INFO L226 Difference]: Without dead ends: 24 [2020-09-24 16:10:44,125 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-09-24 16:10:44,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-09-24 16:10:44,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2020-09-24 16:10:44,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-09-24 16:10:44,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2020-09-24 16:10:44,131 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 20 [2020-09-24 16:10:44,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:10:44,132 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2020-09-24 16:10:44,132 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-24 16:10:44,132 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2020-09-24 16:10:44,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-24 16:10:44,133 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:10:44,133 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:10:44,133 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-24 16:10:44,133 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:10:44,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:10:44,134 INFO L82 PathProgramCache]: Analyzing trace with hash -389692425, now seen corresponding path program 6 times [2020-09-24 16:10:44,134 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:10:44,134 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1919649027] [2020-09-24 16:10:44,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:10:44,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:44,170 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:44,171 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:44,171 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:44,171 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:44,171 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-09-24 16:10:44,171 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:44,172 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-09-24 16:10:44,172 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:44,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-24 16:10:44,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 16:10:44,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-09-24 16:10:44,173 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:10:44,296 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:10:44,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:44,298 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:44,298 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:44,298 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:44,299 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:44,299 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 16:10:44,299 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:44,299 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:10:44,299 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:44,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:10:44,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:10:44,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:10:44,300 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:10:44,303 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:10:44,304 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1919649027] [2020-09-24 16:10:44,304 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:10:44,304 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-24 16:10:44,304 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985860588] [2020-09-24 16:10:44,305 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-24 16:10:44,305 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:10:44,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-24 16:10:44,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-09-24 16:10:44,306 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 9 states. [2020-09-24 16:10:44,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:10:44,395 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2020-09-24 16:10:44,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-24 16:10:44,398 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 22 [2020-09-24 16:10:44,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:10:44,400 INFO L225 Difference]: With dead ends: 31 [2020-09-24 16:10:44,400 INFO L226 Difference]: Without dead ends: 26 [2020-09-24 16:10:44,401 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-09-24 16:10:44,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-09-24 16:10:44,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2020-09-24 16:10:44,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-09-24 16:10:44,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2020-09-24 16:10:44,414 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 22 [2020-09-24 16:10:44,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:10:44,415 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2020-09-24 16:10:44,415 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-24 16:10:44,415 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2020-09-24 16:10:44,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-24 16:10:44,416 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:10:44,416 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:10:44,416 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-24 16:10:44,417 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:10:44,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:10:44,417 INFO L82 PathProgramCache]: Analyzing trace with hash 333571254, now seen corresponding path program 7 times [2020-09-24 16:10:44,418 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:10:44,418 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1496316683] [2020-09-24 16:10:44,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:10:44,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:44,482 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:44,482 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:44,482 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:44,483 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:44,483 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-09-24 16:10:44,483 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:44,483 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-09-24 16:10:44,483 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:44,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-24 16:10:44,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 16:10:44,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-24 16:10:44,484 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:10:44,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:10:44,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:44,631 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:44,632 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:44,632 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:44,632 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:44,632 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 16:10:44,633 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:44,633 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:10:44,633 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:44,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:10:44,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:10:44,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:10:44,634 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:10:44,637 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:10:44,638 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1496316683] [2020-09-24 16:10:44,638 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:10:44,638 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-24 16:10:44,639 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008169185] [2020-09-24 16:10:44,639 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-24 16:10:44,640 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:10:44,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-24 16:10:44,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-09-24 16:10:44,640 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 10 states. [2020-09-24 16:10:44,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:10:44,760 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2020-09-24 16:10:44,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-24 16:10:44,761 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 24 [2020-09-24 16:10:44,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:10:44,762 INFO L225 Difference]: With dead ends: 33 [2020-09-24 16:10:44,763 INFO L226 Difference]: Without dead ends: 28 [2020-09-24 16:10:44,763 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-09-24 16:10:44,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-09-24 16:10:44,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2020-09-24 16:10:44,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-09-24 16:10:44,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2020-09-24 16:10:44,770 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 24 [2020-09-24 16:10:44,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:10:44,770 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2020-09-24 16:10:44,770 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-24 16:10:44,770 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2020-09-24 16:10:44,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-24 16:10:44,771 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:10:44,771 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:10:44,772 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-24 16:10:44,772 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:10:44,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:10:44,773 INFO L82 PathProgramCache]: Analyzing trace with hash -394735179, now seen corresponding path program 8 times [2020-09-24 16:10:44,773 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:10:44,773 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [131844121] [2020-09-24 16:10:44,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:10:44,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:44,825 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:44,826 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:44,826 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:44,826 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:44,826 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-09-24 16:10:44,827 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:44,827 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 35 [2020-09-24 16:10:44,827 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:44,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-24 16:10:44,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 16:10:44,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-24 16:10:44,828 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:10:45,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:10:45,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:45,033 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:45,034 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:45,034 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:45,035 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:45,035 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 16:10:45,035 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:45,035 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:10:45,035 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:45,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:10:45,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:10:45,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:10:45,036 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:10:45,040 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:10:45,040 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [131844121] [2020-09-24 16:10:45,041 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:10:45,041 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-24 16:10:45,041 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63777148] [2020-09-24 16:10:45,042 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-24 16:10:45,043 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:10:45,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-24 16:10:45,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-09-24 16:10:45,045 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 11 states. [2020-09-24 16:10:45,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:10:45,193 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2020-09-24 16:10:45,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-24 16:10:45,194 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 26 [2020-09-24 16:10:45,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:10:45,195 INFO L225 Difference]: With dead ends: 35 [2020-09-24 16:10:45,195 INFO L226 Difference]: Without dead ends: 30 [2020-09-24 16:10:45,197 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-09-24 16:10:45,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-09-24 16:10:45,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2020-09-24 16:10:45,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-09-24 16:10:45,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2020-09-24 16:10:45,207 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 26 [2020-09-24 16:10:45,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:10:45,208 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2020-09-24 16:10:45,208 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-24 16:10:45,208 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2020-09-24 16:10:45,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-24 16:10:45,210 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:10:45,210 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:10:45,211 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-24 16:10:45,211 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:10:45,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:10:45,211 INFO L82 PathProgramCache]: Analyzing trace with hash -217548044, now seen corresponding path program 9 times [2020-09-24 16:10:45,212 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:10:45,212 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [888944138] [2020-09-24 16:10:45,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:10:45,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:45,272 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:45,273 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:45,273 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:45,274 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:45,274 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-09-24 16:10:45,274 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:45,274 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-09-24 16:10:45,275 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:45,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-09-24 16:10:45,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 16:10:45,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-09-24 16:10:45,276 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 16:10:45,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:10:45,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:45,474 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:45,477 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:45,477 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:45,477 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:45,478 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 16:10:45,478 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:45,478 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-24 16:10:45,478 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:45,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:10:45,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:10:45,479 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:10:45,479 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:10:45,484 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:10:45,484 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [888944138] [2020-09-24 16:10:45,485 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:10:45,485 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-24 16:10:45,485 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354135160] [2020-09-24 16:10:45,486 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-24 16:10:45,487 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:10:45,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-24 16:10:45,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-09-24 16:10:45,487 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 12 states. [2020-09-24 16:10:45,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:10:45,653 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2020-09-24 16:10:45,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-24 16:10:45,655 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 28 [2020-09-24 16:10:45,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:10:45,656 INFO L225 Difference]: With dead ends: 37 [2020-09-24 16:10:45,656 INFO L226 Difference]: Without dead ends: 32 [2020-09-24 16:10:45,656 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-09-24 16:10:45,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-09-24 16:10:45,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2020-09-24 16:10:45,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-09-24 16:10:45,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2020-09-24 16:10:45,665 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 28 [2020-09-24 16:10:45,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:10:45,666 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2020-09-24 16:10:45,666 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-24 16:10:45,666 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2020-09-24 16:10:45,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-24 16:10:45,669 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:10:45,669 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:10:45,670 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-24 16:10:45,670 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:10:45,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:10:45,670 INFO L82 PathProgramCache]: Analyzing trace with hash -1739403149, now seen corresponding path program 10 times [2020-09-24 16:10:45,671 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:10:45,671 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1597157528] [2020-09-24 16:10:45,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:10:45,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:45,712 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:45,712 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:45,713 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:45,713 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:45,713 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-09-24 16:10:45,713 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:45,713 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 28 [2020-09-24 16:10:45,713 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:45,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-24 16:10:45,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 16:10:45,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-09-24 16:10:45,714 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:10:45,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:10:45,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:45,926 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:45,926 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:45,927 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:45,927 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:45,927 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 16:10:45,927 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:45,927 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:10:45,927 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:45,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:10:45,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:10:45,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:10:45,928 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:10:45,933 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:10:45,934 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1597157528] [2020-09-24 16:10:45,934 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:10:45,934 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-24 16:10:45,935 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449800669] [2020-09-24 16:10:45,936 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-24 16:10:45,936 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:10:45,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-24 16:10:45,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-09-24 16:10:45,937 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 13 states. [2020-09-24 16:10:46,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:10:46,124 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2020-09-24 16:10:46,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-24 16:10:46,125 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 30 [2020-09-24 16:10:46,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:10:46,126 INFO L225 Difference]: With dead ends: 39 [2020-09-24 16:10:46,126 INFO L226 Difference]: Without dead ends: 34 [2020-09-24 16:10:46,126 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-09-24 16:10:46,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-09-24 16:10:46,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2020-09-24 16:10:46,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-09-24 16:10:46,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2020-09-24 16:10:46,132 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 30 [2020-09-24 16:10:46,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:10:46,132 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2020-09-24 16:10:46,133 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-24 16:10:46,133 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2020-09-24 16:10:46,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-24 16:10:46,133 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:10:46,134 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:10:46,134 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-24 16:10:46,134 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:10:46,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:10:46,134 INFO L82 PathProgramCache]: Analyzing trace with hash 341688882, now seen corresponding path program 11 times [2020-09-24 16:10:46,135 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:10:46,135 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [73054730] [2020-09-24 16:10:46,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:10:46,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:46,184 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:46,184 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:46,184 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:46,184 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:46,184 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-09-24 16:10:46,185 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:46,185 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 34 [2020-09-24 16:10:46,185 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:46,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-09-24 16:10:46,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 16:10:46,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-09-24 16:10:46,186 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:10:46,399 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:10:46,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:46,403 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:46,404 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:46,404 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:46,404 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:46,404 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 16:10:46,405 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:46,405 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-24 16:10:46,405 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:46,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:10:46,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:10:46,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:10:46,406 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:10:46,411 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:10:46,411 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [73054730] [2020-09-24 16:10:46,411 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:10:46,411 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-09-24 16:10:46,412 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841228876] [2020-09-24 16:10:46,413 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-24 16:10:46,413 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:10:46,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-24 16:10:46,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-09-24 16:10:46,414 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 14 states. [2020-09-24 16:10:46,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:10:46,637 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2020-09-24 16:10:46,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-24 16:10:46,637 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 32 [2020-09-24 16:10:46,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:10:46,638 INFO L225 Difference]: With dead ends: 41 [2020-09-24 16:10:46,638 INFO L226 Difference]: Without dead ends: 36 [2020-09-24 16:10:46,639 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-09-24 16:10:46,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-09-24 16:10:46,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2020-09-24 16:10:46,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-09-24 16:10:46,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2020-09-24 16:10:46,644 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 32 [2020-09-24 16:10:46,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:10:46,644 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2020-09-24 16:10:46,645 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-24 16:10:46,645 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2020-09-24 16:10:46,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-09-24 16:10:46,646 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:10:46,646 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:10:46,646 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-09-24 16:10:46,646 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:10:46,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:10:46,646 INFO L82 PathProgramCache]: Analyzing trace with hash -1183629263, now seen corresponding path program 12 times [2020-09-24 16:10:46,647 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:10:46,647 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1832454744] [2020-09-24 16:10:46,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:10:46,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:46,693 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:46,693 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:46,693 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:46,693 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:46,694 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-09-24 16:10:46,694 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:46,694 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-09-24 16:10:46,694 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:46,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-09-24 16:10:46,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 16:10:46,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-09-24 16:10:46,695 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:10:46,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:10:46,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:46,911 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:46,911 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:46,911 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:46,912 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:46,912 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 16:10:46,912 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:46,912 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:10:46,912 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:46,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:10:46,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:10:46,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:10:46,913 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:10:46,916 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:10:46,917 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1832454744] [2020-09-24 16:10:46,917 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:10:46,917 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-09-24 16:10:46,918 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999216766] [2020-09-24 16:10:46,918 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-24 16:10:46,918 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:10:46,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-24 16:10:46,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2020-09-24 16:10:46,919 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 15 states. [2020-09-24 16:10:47,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:10:47,154 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2020-09-24 16:10:47,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-24 16:10:47,155 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 34 [2020-09-24 16:10:47,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:10:47,156 INFO L225 Difference]: With dead ends: 43 [2020-09-24 16:10:47,156 INFO L226 Difference]: Without dead ends: 38 [2020-09-24 16:10:47,157 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2020-09-24 16:10:47,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-09-24 16:10:47,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2020-09-24 16:10:47,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-09-24 16:10:47,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2020-09-24 16:10:47,163 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 34 [2020-09-24 16:10:47,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:10:47,163 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2020-09-24 16:10:47,163 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-24 16:10:47,163 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2020-09-24 16:10:47,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-09-24 16:10:47,164 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:10:47,164 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:10:47,165 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-09-24 16:10:47,165 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:10:47,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:10:47,165 INFO L82 PathProgramCache]: Analyzing trace with hash 1864448624, now seen corresponding path program 13 times [2020-09-24 16:10:47,165 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:10:47,166 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [94843439] [2020-09-24 16:10:47,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:10:47,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:47,223 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:47,223 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:47,223 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:47,224 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:47,224 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-09-24 16:10:47,224 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:47,224 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 42 [2020-09-24 16:10:47,224 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:47,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-09-24 16:10:47,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 16:10:47,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-09-24 16:10:47,225 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:10:47,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:10:47,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:47,481 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:47,481 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:47,481 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:47,481 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:47,481 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 16:10:47,482 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:47,482 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:10:47,482 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:47,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:10:47,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:10:47,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:10:47,483 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:10:47,486 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:10:47,487 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [94843439] [2020-09-24 16:10:47,487 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:10:47,487 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-09-24 16:10:47,487 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048654360] [2020-09-24 16:10:47,488 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-24 16:10:47,488 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:10:47,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-24 16:10:47,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2020-09-24 16:10:47,489 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 16 states. [2020-09-24 16:10:47,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:10:47,767 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2020-09-24 16:10:47,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-24 16:10:47,767 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 36 [2020-09-24 16:10:47,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:10:47,768 INFO L225 Difference]: With dead ends: 45 [2020-09-24 16:10:47,769 INFO L226 Difference]: Without dead ends: 40 [2020-09-24 16:10:47,769 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2020-09-24 16:10:47,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-09-24 16:10:47,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2020-09-24 16:10:47,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-09-24 16:10:47,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2020-09-24 16:10:47,775 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 36 [2020-09-24 16:10:47,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:10:47,775 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2020-09-24 16:10:47,775 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-24 16:10:47,775 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2020-09-24 16:10:47,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-09-24 16:10:47,776 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:10:47,776 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:10:47,776 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-09-24 16:10:47,777 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:10:47,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:10:47,777 INFO L82 PathProgramCache]: Analyzing trace with hash 1899602159, now seen corresponding path program 14 times [2020-09-24 16:10:47,777 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:10:47,778 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1830071749] [2020-09-24 16:10:47,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:10:47,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:47,836 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:47,837 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:47,837 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:47,837 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:47,838 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-09-24 16:10:47,838 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:47,838 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 43 [2020-09-24 16:10:47,838 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:47,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-09-24 16:10:47,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 16:10:47,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-09-24 16:10:47,839 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:10:48,114 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:10:48,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:48,116 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:48,116 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:48,135 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:48,135 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:48,135 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 16:10:48,135 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:48,136 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-09-24 16:10:48,138 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:48,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:10:48,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:10:48,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:10:48,139 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:10:48,144 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:10:48,144 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1830071749] [2020-09-24 16:10:48,146 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:10:48,146 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-09-24 16:10:48,147 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084994329] [2020-09-24 16:10:48,147 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-24 16:10:48,148 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:10:48,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-24 16:10:48,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2020-09-24 16:10:48,148 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 17 states. [2020-09-24 16:10:48,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:10:48,440 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2020-09-24 16:10:48,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-24 16:10:48,441 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 38 [2020-09-24 16:10:48,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:10:48,441 INFO L225 Difference]: With dead ends: 47 [2020-09-24 16:10:48,442 INFO L226 Difference]: Without dead ends: 42 [2020-09-24 16:10:48,442 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2020-09-24 16:10:48,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-09-24 16:10:48,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2020-09-24 16:10:48,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-09-24 16:10:48,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2020-09-24 16:10:48,452 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 38 [2020-09-24 16:10:48,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:10:48,452 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2020-09-24 16:10:48,452 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-24 16:10:48,452 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2020-09-24 16:10:48,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-09-24 16:10:48,453 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:10:48,453 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:10:48,453 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-09-24 16:10:48,456 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:10:48,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:10:48,456 INFO L82 PathProgramCache]: Analyzing trace with hash 1322410926, now seen corresponding path program 15 times [2020-09-24 16:10:48,457 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:10:48,457 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1870733591] [2020-09-24 16:10:48,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:10:48,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:48,559 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:48,560 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:48,560 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:48,560 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:48,560 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-09-24 16:10:48,561 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:48,561 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 65 [2020-09-24 16:10:48,561 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:48,561 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-09-24 16:10:48,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 16:10:48,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-09-24 16:10:48,562 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:10:48,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:10:48,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:48,950 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:48,951 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:48,951 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:48,951 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:48,952 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 16:10:48,952 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:48,952 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-24 16:10:48,953 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:48,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:10:48,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:10:48,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:10:48,954 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 16:10:48,961 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:10:48,962 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1870733591] [2020-09-24 16:10:48,962 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:10:48,962 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-09-24 16:10:48,963 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969349956] [2020-09-24 16:10:48,964 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-24 16:10:48,965 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:10:48,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-24 16:10:48,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2020-09-24 16:10:48,966 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 18 states. [2020-09-24 16:10:49,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:10:49,315 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2020-09-24 16:10:49,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-24 16:10:49,316 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 40 [2020-09-24 16:10:49,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:10:49,316 INFO L225 Difference]: With dead ends: 49 [2020-09-24 16:10:49,316 INFO L226 Difference]: Without dead ends: 44 [2020-09-24 16:10:49,317 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2020-09-24 16:10:49,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-09-24 16:10:49,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2020-09-24 16:10:49,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-09-24 16:10:49,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2020-09-24 16:10:49,326 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 40 [2020-09-24 16:10:49,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:10:49,327 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2020-09-24 16:10:49,327 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-24 16:10:49,327 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2020-09-24 16:10:49,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-09-24 16:10:49,328 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:10:49,328 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:10:49,329 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-09-24 16:10:49,329 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:10:49,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:10:49,329 INFO L82 PathProgramCache]: Analyzing trace with hash 692417197, now seen corresponding path program 16 times [2020-09-24 16:10:49,329 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:10:49,330 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1053564827] [2020-09-24 16:10:49,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:10:49,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:49,432 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:49,432 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:49,432 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:49,433 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:49,433 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-09-24 16:10:49,433 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:49,433 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 78 [2020-09-24 16:10:49,433 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:49,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-09-24 16:10:49,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 16:10:49,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-09-24 16:10:49,435 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:10:49,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:10:49,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:49,773 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:49,774 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:49,774 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:49,774 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:49,774 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 16:10:49,774 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:49,775 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:10:49,775 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:49,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:10:49,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:10:49,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:10:49,776 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:10:49,780 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:10:49,780 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1053564827] [2020-09-24 16:10:49,781 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:10:49,781 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-09-24 16:10:49,781 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159544124] [2020-09-24 16:10:49,781 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-24 16:10:49,782 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:10:49,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-24 16:10:49,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2020-09-24 16:10:49,783 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 19 states. [2020-09-24 16:10:50,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:10:50,234 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2020-09-24 16:10:50,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-24 16:10:50,235 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 42 [2020-09-24 16:10:50,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:10:50,236 INFO L225 Difference]: With dead ends: 51 [2020-09-24 16:10:50,236 INFO L226 Difference]: Without dead ends: 46 [2020-09-24 16:10:50,237 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2020-09-24 16:10:50,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-09-24 16:10:50,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2020-09-24 16:10:50,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-09-24 16:10:50,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2020-09-24 16:10:50,250 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 42 [2020-09-24 16:10:50,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:10:50,250 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2020-09-24 16:10:50,250 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-24 16:10:50,251 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2020-09-24 16:10:50,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-09-24 16:10:50,251 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:10:50,251 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:10:50,252 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-09-24 16:10:50,252 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:10:50,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:10:50,252 INFO L82 PathProgramCache]: Analyzing trace with hash 858832364, now seen corresponding path program 17 times [2020-09-24 16:10:50,252 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:10:50,253 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1902694423] [2020-09-24 16:10:50,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:10:50,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:50,324 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:50,325 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:50,325 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:50,325 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:50,325 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-09-24 16:10:50,325 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:50,326 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 54 [2020-09-24 16:10:50,326 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:50,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-09-24 16:10:50,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 16:10:50,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-09-24 16:10:50,326 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:10:50,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:10:50,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:50,745 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:50,745 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:50,745 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:50,745 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:50,746 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 16:10:50,746 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:50,746 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:10:50,746 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:50,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:10:50,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:10:50,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:10:50,747 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:10:50,752 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:10:50,752 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1902694423] [2020-09-24 16:10:50,753 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:10:50,753 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-09-24 16:10:50,753 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588335797] [2020-09-24 16:10:50,754 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-24 16:10:50,754 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:10:50,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-24 16:10:50,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2020-09-24 16:10:50,755 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 20 states. [2020-09-24 16:10:51,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:10:51,266 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2020-09-24 16:10:51,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-24 16:10:51,267 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 44 [2020-09-24 16:10:51,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:10:51,267 INFO L225 Difference]: With dead ends: 53 [2020-09-24 16:10:51,268 INFO L226 Difference]: Without dead ends: 48 [2020-09-24 16:10:51,268 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2020-09-24 16:10:51,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-09-24 16:10:51,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2020-09-24 16:10:51,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-09-24 16:10:51,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2020-09-24 16:10:51,273 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 44 [2020-09-24 16:10:51,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:10:51,274 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2020-09-24 16:10:51,274 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-24 16:10:51,274 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2020-09-24 16:10:51,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-09-24 16:10:51,275 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:10:51,275 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:10:51,275 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-09-24 16:10:51,275 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:10:51,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:10:51,276 INFO L82 PathProgramCache]: Analyzing trace with hash 1870017899, now seen corresponding path program 18 times [2020-09-24 16:10:51,276 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:10:51,276 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [362353881] [2020-09-24 16:10:51,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:10:51,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:51,365 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:51,365 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:51,365 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:51,366 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:51,366 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-09-24 16:10:51,366 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:51,367 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 72 [2020-09-24 16:10:51,367 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:51,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-09-24 16:10:51,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 16:10:51,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-09-24 16:10:51,368 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 16:10:51,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:10:51,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:51,780 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:51,780 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:51,780 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:51,780 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:51,780 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 16:10:51,781 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:51,781 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:10:51,781 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:51,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:10:51,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:10:51,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:10:51,782 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:10:51,790 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:10:51,790 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [362353881] [2020-09-24 16:10:51,790 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:10:51,790 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-09-24 16:10:51,791 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276118610] [2020-09-24 16:10:51,791 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-24 16:10:51,791 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:10:51,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-24 16:10:51,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2020-09-24 16:10:51,792 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 21 states. [2020-09-24 16:10:52,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:10:52,252 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2020-09-24 16:10:52,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-24 16:10:52,253 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 46 [2020-09-24 16:10:52,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:10:52,254 INFO L225 Difference]: With dead ends: 55 [2020-09-24 16:10:52,254 INFO L226 Difference]: Without dead ends: 50 [2020-09-24 16:10:52,255 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2020-09-24 16:10:52,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-09-24 16:10:52,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2020-09-24 16:10:52,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-09-24 16:10:52,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2020-09-24 16:10:52,265 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 46 [2020-09-24 16:10:52,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:10:52,266 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2020-09-24 16:10:52,267 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-24 16:10:52,267 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2020-09-24 16:10:52,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-09-24 16:10:52,268 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:10:52,268 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:10:52,268 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-09-24 16:10:52,268 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:10:52,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:10:52,269 INFO L82 PathProgramCache]: Analyzing trace with hash -1338259158, now seen corresponding path program 19 times [2020-09-24 16:10:52,269 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:10:52,269 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [604044156] [2020-09-24 16:10:52,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:10:52,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:52,398 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:52,398 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:52,398 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:52,399 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:52,399 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-09-24 16:10:52,399 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:52,399 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 105 [2020-09-24 16:10:52,400 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:52,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-09-24 16:10:52,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 16:10:52,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-09-24 16:10:52,401 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 16:10:52,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:10:52,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:52,838 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:52,839 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:52,839 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:52,839 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:52,839 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 16:10:52,839 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:52,839 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:10:52,839 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:52,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:10:52,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:10:52,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:10:52,840 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:10:52,844 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:10:52,844 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [604044156] [2020-09-24 16:10:52,845 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:10:52,845 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-09-24 16:10:52,845 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526093725] [2020-09-24 16:10:52,845 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-24 16:10:52,845 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:10:52,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-24 16:10:52,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2020-09-24 16:10:52,846 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 22 states. [2020-09-24 16:10:53,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:10:53,438 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2020-09-24 16:10:53,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-24 16:10:53,439 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 48 [2020-09-24 16:10:53,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:10:53,440 INFO L225 Difference]: With dead ends: 57 [2020-09-24 16:10:53,440 INFO L226 Difference]: Without dead ends: 52 [2020-09-24 16:10:53,440 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=60, Invalid=402, Unknown=0, NotChecked=0, Total=462 [2020-09-24 16:10:53,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-09-24 16:10:53,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2020-09-24 16:10:53,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-09-24 16:10:53,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2020-09-24 16:10:53,454 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 48 [2020-09-24 16:10:53,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:10:53,454 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2020-09-24 16:10:53,455 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-24 16:10:53,455 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2020-09-24 16:10:53,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-09-24 16:10:53,455 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:10:53,455 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:10:53,456 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-09-24 16:10:53,456 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:10:53,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:10:53,456 INFO L82 PathProgramCache]: Analyzing trace with hash -705992407, now seen corresponding path program 20 times [2020-09-24 16:10:53,456 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:10:53,457 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1830952604] [2020-09-24 16:10:53,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:10:53,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:53,556 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:53,556 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:53,556 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:53,557 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:53,557 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-09-24 16:10:53,557 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:53,557 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 70 [2020-09-24 16:10:53,557 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:53,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-09-24 16:10:53,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 16:10:53,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-09-24 16:10:53,558 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:10:54,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:10:54,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:54,018 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:54,018 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:54,018 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:54,019 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:54,019 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 16:10:54,019 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:54,019 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:10:54,020 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:54,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:10:54,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:10:54,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:10:54,021 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 16:10:54,042 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:10:54,044 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1830952604] [2020-09-24 16:10:54,044 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:10:54,044 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-09-24 16:10:54,045 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521048131] [2020-09-24 16:10:54,046 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-24 16:10:54,046 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:10:54,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-24 16:10:54,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2020-09-24 16:10:54,047 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 23 states. [2020-09-24 16:10:54,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:10:54,580 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2020-09-24 16:10:54,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-24 16:10:54,581 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 50 [2020-09-24 16:10:54,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:10:54,582 INFO L225 Difference]: With dead ends: 59 [2020-09-24 16:10:54,582 INFO L226 Difference]: Without dead ends: 54 [2020-09-24 16:10:54,583 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2020-09-24 16:10:54,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-09-24 16:10:54,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2020-09-24 16:10:54,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-09-24 16:10:54,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2020-09-24 16:10:54,588 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 50 [2020-09-24 16:10:54,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:10:54,588 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2020-09-24 16:10:54,588 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-24 16:10:54,588 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2020-09-24 16:10:54,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-09-24 16:10:54,589 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:10:54,589 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:10:54,589 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-09-24 16:10:54,590 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:10:54,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:10:54,590 INFO L82 PathProgramCache]: Analyzing trace with hash 1311966568, now seen corresponding path program 21 times [2020-09-24 16:10:54,590 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:10:54,590 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [793245222] [2020-09-24 16:10:54,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:10:54,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:54,680 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:54,680 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:54,680 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:54,681 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:54,681 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-09-24 16:10:54,681 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:54,681 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 71 [2020-09-24 16:10:54,681 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:54,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-09-24 16:10:54,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 16:10:54,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-09-24 16:10:54,682 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:10:55,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:10:55,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:55,210 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:55,210 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:55,211 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:55,211 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:55,211 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 16:10:55,211 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:55,211 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:10:55,211 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:55,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:10:55,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:10:55,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:10:55,212 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:10:55,216 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:10:55,217 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [793245222] [2020-09-24 16:10:55,217 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:10:55,217 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-09-24 16:10:55,217 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658023487] [2020-09-24 16:10:55,218 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-24 16:10:55,218 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:10:55,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-24 16:10:55,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2020-09-24 16:10:55,219 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 24 states. [2020-09-24 16:10:55,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:10:55,933 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2020-09-24 16:10:55,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-24 16:10:55,934 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 52 [2020-09-24 16:10:55,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:10:55,935 INFO L225 Difference]: With dead ends: 61 [2020-09-24 16:10:55,935 INFO L226 Difference]: Without dead ends: 56 [2020-09-24 16:10:55,936 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2020-09-24 16:10:55,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-09-24 16:10:55,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2020-09-24 16:10:55,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-09-24 16:10:55,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2020-09-24 16:10:55,940 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 52 [2020-09-24 16:10:55,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:10:55,940 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2020-09-24 16:10:55,940 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-24 16:10:55,941 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2020-09-24 16:10:55,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-09-24 16:10:55,941 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:10:55,941 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:10:55,941 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-09-24 16:10:55,942 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:10:55,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:10:55,942 INFO L82 PathProgramCache]: Analyzing trace with hash -754676249, now seen corresponding path program 22 times [2020-09-24 16:10:55,942 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:10:55,942 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1117364260] [2020-09-24 16:10:55,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:10:55,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:56,045 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:56,046 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:56,046 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:56,046 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:56,046 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-09-24 16:10:56,046 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:56,046 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 84 [2020-09-24 16:10:56,047 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:56,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-09-24 16:10:56,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 16:10:56,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-09-24 16:10:56,047 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:10:56,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:10:56,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:56,664 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:56,664 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:56,664 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:56,665 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:56,665 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 16:10:56,665 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:56,665 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:10:56,665 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:56,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:10:56,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:10:56,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:10:56,666 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:10:56,673 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:10:56,674 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1117364260] [2020-09-24 16:10:56,674 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:10:56,674 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-09-24 16:10:56,674 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927110071] [2020-09-24 16:10:56,675 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-24 16:10:56,675 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:10:56,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-24 16:10:56,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2020-09-24 16:10:56,676 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 25 states. [2020-09-24 16:10:57,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:10:57,362 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2020-09-24 16:10:57,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-24 16:10:57,363 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 54 [2020-09-24 16:10:57,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:10:57,364 INFO L225 Difference]: With dead ends: 63 [2020-09-24 16:10:57,364 INFO L226 Difference]: Without dead ends: 58 [2020-09-24 16:10:57,365 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2020-09-24 16:10:57,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-09-24 16:10:57,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2020-09-24 16:10:57,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-24 16:10:57,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2020-09-24 16:10:57,370 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 54 [2020-09-24 16:10:57,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:10:57,370 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2020-09-24 16:10:57,370 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-24 16:10:57,370 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2020-09-24 16:10:57,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-09-24 16:10:57,371 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:10:57,371 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:10:57,371 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-09-24 16:10:57,372 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:10:57,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:10:57,372 INFO L82 PathProgramCache]: Analyzing trace with hash 1771434662, now seen corresponding path program 23 times [2020-09-24 16:10:57,372 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:10:57,372 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [642257858] [2020-09-24 16:10:57,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:10:57,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:57,502 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:57,503 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:57,503 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:57,503 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:57,503 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-09-24 16:10:57,504 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:57,504 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 107 [2020-09-24 16:10:57,504 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:57,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-09-24 16:10:57,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 16:10:57,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-09-24 16:10:57,505 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:10:58,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:10:58,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:58,020 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:58,020 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:58,021 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:58,021 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:58,021 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 16:10:58,021 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:58,021 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:10:58,022 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:58,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:10:58,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:10:58,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:10:58,022 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:10:58,029 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:10:58,029 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [642257858] [2020-09-24 16:10:58,029 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:10:58,030 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-09-24 16:10:58,030 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828376515] [2020-09-24 16:10:58,030 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-24 16:10:58,030 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:10:58,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-24 16:10:58,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2020-09-24 16:10:58,031 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 26 states. [2020-09-24 16:10:58,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:10:58,860 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2020-09-24 16:10:58,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-24 16:10:58,860 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 56 [2020-09-24 16:10:58,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:10:58,861 INFO L225 Difference]: With dead ends: 65 [2020-09-24 16:10:58,861 INFO L226 Difference]: Without dead ends: 60 [2020-09-24 16:10:58,862 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=72, Invalid=578, Unknown=0, NotChecked=0, Total=650 [2020-09-24 16:10:58,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-09-24 16:10:58,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2020-09-24 16:10:58,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-09-24 16:10:58,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2020-09-24 16:10:58,866 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 56 [2020-09-24 16:10:58,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:10:58,866 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2020-09-24 16:10:58,866 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-24 16:10:58,866 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2020-09-24 16:10:58,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-09-24 16:10:58,867 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:10:58,867 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:10:58,867 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-09-24 16:10:58,867 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:10:58,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:10:58,868 INFO L82 PathProgramCache]: Analyzing trace with hash -1587469403, now seen corresponding path program 24 times [2020-09-24 16:10:58,868 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:10:58,868 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [830911118] [2020-09-24 16:10:58,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:10:58,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:58,981 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:58,981 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:58,981 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:58,981 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:58,982 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-09-24 16:10:58,982 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:58,982 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 94 [2020-09-24 16:10:58,982 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:58,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-09-24 16:10:58,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 16:10:58,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-09-24 16:10:58,983 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:10:59,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:10:59,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:10:59,563 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:10:59,564 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:10:59,564 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:10:59,564 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:10:59,564 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 16:10:59,564 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:10:59,564 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:10:59,566 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:10:59,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:10:59,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:10:59,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:10:59,566 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:10:59,574 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:10:59,574 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [830911118] [2020-09-24 16:10:59,574 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:10:59,574 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-09-24 16:10:59,574 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871550734] [2020-09-24 16:10:59,576 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-09-24 16:10:59,576 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:10:59,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-09-24 16:10:59,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2020-09-24 16:10:59,577 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 27 states. [2020-09-24 16:11:00,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:11:00,503 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2020-09-24 16:11:00,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-24 16:11:00,504 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 58 [2020-09-24 16:11:00,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:11:00,505 INFO L225 Difference]: With dead ends: 67 [2020-09-24 16:11:00,505 INFO L226 Difference]: Without dead ends: 62 [2020-09-24 16:11:00,506 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2020-09-24 16:11:00,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-09-24 16:11:00,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2020-09-24 16:11:00,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-09-24 16:11:00,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2020-09-24 16:11:00,510 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 58 [2020-09-24 16:11:00,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:11:00,511 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2020-09-24 16:11:00,511 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-09-24 16:11:00,511 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2020-09-24 16:11:00,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-09-24 16:11:00,512 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:11:00,512 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:11:00,512 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-09-24 16:11:00,512 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:11:00,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:11:00,512 INFO L82 PathProgramCache]: Analyzing trace with hash 321130724, now seen corresponding path program 25 times [2020-09-24 16:11:00,513 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:11:00,513 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [157619717] [2020-09-24 16:11:00,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:11:00,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:11:00,625 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:11:00,626 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:11:00,626 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:11:00,626 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:11:00,626 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-09-24 16:11:00,626 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:11:00,626 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 93 [2020-09-24 16:11:00,627 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:11:00,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-09-24 16:11:00,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 16:11:00,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-09-24 16:11:00,627 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:11:01,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:11:01,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:11:01,239 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:11:01,239 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:11:01,239 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:11:01,239 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:11:01,240 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 16:11:01,240 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:11:01,240 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:11:01,240 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:11:01,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:11:01,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:11:01,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:11:01,243 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-24 16:11:01,252 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:11:01,253 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [157619717] [2020-09-24 16:11:01,253 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:11:01,253 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-09-24 16:11:01,253 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120448833] [2020-09-24 16:11:01,255 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-24 16:11:01,255 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:11:01,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-24 16:11:01,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=678, Unknown=0, NotChecked=0, Total=756 [2020-09-24 16:11:01,256 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 28 states. [2020-09-24 16:11:02,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:11:02,114 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2020-09-24 16:11:02,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-24 16:11:02,118 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 60 [2020-09-24 16:11:02,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:11:02,119 INFO L225 Difference]: With dead ends: 69 [2020-09-24 16:11:02,119 INFO L226 Difference]: Without dead ends: 64 [2020-09-24 16:11:02,120 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=78, Invalid=678, Unknown=0, NotChecked=0, Total=756 [2020-09-24 16:11:02,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-09-24 16:11:02,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2020-09-24 16:11:02,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-09-24 16:11:02,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2020-09-24 16:11:02,129 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 60 [2020-09-24 16:11:02,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:11:02,134 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2020-09-24 16:11:02,134 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-24 16:11:02,134 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2020-09-24 16:11:02,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-09-24 16:11:02,135 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:11:02,135 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:11:02,135 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-09-24 16:11:02,135 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:11:02,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:11:02,135 INFO L82 PathProgramCache]: Analyzing trace with hash 534817379, now seen corresponding path program 26 times [2020-09-24 16:11:02,135 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:11:02,136 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [142176010] [2020-09-24 16:11:02,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:11:02,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:11:02,272 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:11:02,273 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:11:02,273 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:11:02,273 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:11:02,273 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-09-24 16:11:02,274 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:11:02,274 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 117 [2020-09-24 16:11:02,274 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:11:02,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-09-24 16:11:02,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 16:11:02,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-09-24 16:11:02,275 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:11:02,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:11:02,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:11:02,884 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:11:02,885 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:11:02,885 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:11:02,885 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:11:02,885 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 16:11:02,886 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:11:02,886 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 16:11:02,886 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:11:02,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:11:02,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:11:02,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:11:02,887 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:11:02,895 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:11:02,896 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [142176010] [2020-09-24 16:11:02,896 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:11:02,896 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-09-24 16:11:02,896 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137813795] [2020-09-24 16:11:02,897 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-09-24 16:11:02,897 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:11:02,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-09-24 16:11:02,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2020-09-24 16:11:02,898 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 29 states. [2020-09-24 16:11:03,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:11:03,930 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2020-09-24 16:11:03,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-24 16:11:03,931 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 62 [2020-09-24 16:11:03,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:11:03,932 INFO L225 Difference]: With dead ends: 71 [2020-09-24 16:11:03,932 INFO L226 Difference]: Without dead ends: 66 [2020-09-24 16:11:03,933 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=81, Invalid=731, Unknown=0, NotChecked=0, Total=812 [2020-09-24 16:11:03,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-09-24 16:11:03,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2020-09-24 16:11:03,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-09-24 16:11:03,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2020-09-24 16:11:03,938 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 62 [2020-09-24 16:11:03,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:11:03,938 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2020-09-24 16:11:03,938 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-09-24 16:11:03,938 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2020-09-24 16:11:03,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-09-24 16:11:03,939 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:11:03,939 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:11:03,939 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-09-24 16:11:03,939 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:11:03,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:11:03,940 INFO L82 PathProgramCache]: Analyzing trace with hash -270737374, now seen corresponding path program 27 times [2020-09-24 16:11:03,940 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:11:03,940 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [847876125] [2020-09-24 16:11:03,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:11:03,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:11:04,090 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:11:04,091 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:11:04,091 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:11:04,091 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:11:04,091 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-09-24 16:11:04,092 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:11:04,092 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 129 [2020-09-24 16:11:04,092 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:11:04,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-09-24 16:11:04,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 16:11:04,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-09-24 16:11:04,093 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:11:04,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:11:04,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:11:04,786 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:11:04,786 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:11:04,787 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:11:04,787 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:11:04,787 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 16:11:04,787 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:11:04,787 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-09-24 16:11:04,787 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:11:04,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:11:04,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:11:04,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:11:04,788 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:11:04,797 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:11:04,797 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [847876125] [2020-09-24 16:11:04,798 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:11:04,798 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-09-24 16:11:04,798 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534046372] [2020-09-24 16:11:04,798 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-09-24 16:11:04,799 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:11:04,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-09-24 16:11:04,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2020-09-24 16:11:04,799 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 30 states. [2020-09-24 16:11:05,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:11:05,906 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2020-09-24 16:11:05,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-24 16:11:05,907 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 64 [2020-09-24 16:11:05,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:11:05,908 INFO L225 Difference]: With dead ends: 73 [2020-09-24 16:11:05,908 INFO L226 Difference]: Without dead ends: 68 [2020-09-24 16:11:05,908 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2020-09-24 16:11:05,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-09-24 16:11:05,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2020-09-24 16:11:05,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-09-24 16:11:05,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2020-09-24 16:11:05,913 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 64 [2020-09-24 16:11:05,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:11:05,913 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2020-09-24 16:11:05,913 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-09-24 16:11:05,914 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2020-09-24 16:11:05,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-09-24 16:11:05,914 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:11:05,914 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:11:05,915 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-09-24 16:11:05,915 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:11:05,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:11:05,915 INFO L82 PathProgramCache]: Analyzing trace with hash -1314741727, now seen corresponding path program 28 times [2020-09-24 16:11:05,915 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:11:05,916 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [176295068] [2020-09-24 16:11:05,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:11:05,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:11:06,057 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:11:06,057 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:11:06,058 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:11:06,058 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:11:06,058 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-09-24 16:11:06,058 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:11:06,058 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 121 [2020-09-24 16:11:06,058 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:11:06,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-09-24 16:11:06,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 16:11:06,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-09-24 16:11:06,059 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:11:06,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:11:06,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:11:06,788 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:11:06,788 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:11:06,788 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:11:06,788 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:11:06,788 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 16:11:06,789 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:11:06,789 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:11:06,789 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:11:06,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:11:06,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:11:06,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:11:06,790 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:11:06,799 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:11:06,799 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [176295068] [2020-09-24 16:11:06,799 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:11:06,800 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-09-24 16:11:06,800 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147009124] [2020-09-24 16:11:06,800 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-09-24 16:11:06,800 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:11:06,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-09-24 16:11:06,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=843, Unknown=0, NotChecked=0, Total=930 [2020-09-24 16:11:06,802 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 31 states. [2020-09-24 16:11:08,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:11:08,100 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2020-09-24 16:11:08,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-24 16:11:08,101 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 66 [2020-09-24 16:11:08,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:11:08,102 INFO L225 Difference]: With dead ends: 75 [2020-09-24 16:11:08,102 INFO L226 Difference]: Without dead ends: 70 [2020-09-24 16:11:08,103 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=87, Invalid=843, Unknown=0, NotChecked=0, Total=930 [2020-09-24 16:11:08,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-09-24 16:11:08,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2020-09-24 16:11:08,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-09-24 16:11:08,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2020-09-24 16:11:08,107 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 66 [2020-09-24 16:11:08,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:11:08,108 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2020-09-24 16:11:08,108 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-09-24 16:11:08,108 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2020-09-24 16:11:08,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-09-24 16:11:08,109 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:11:08,109 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:11:08,109 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-09-24 16:11:08,109 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:11:08,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:11:08,110 INFO L82 PathProgramCache]: Analyzing trace with hash 419422304, now seen corresponding path program 29 times [2020-09-24 16:11:08,110 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:11:08,110 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2071772774] [2020-09-24 16:11:08,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:11:08,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:11:08,265 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:11:08,265 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:11:08,266 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:11:08,266 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:11:08,266 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-09-24 16:11:08,266 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:11:08,266 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 134 [2020-09-24 16:11:08,267 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:11:08,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-09-24 16:11:08,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 16:11:08,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-09-24 16:11:08,267 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:11:09,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:11:09,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:11:09,123 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:11:09,124 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:11:09,124 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:11:09,124 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:11:09,124 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 16:11:09,124 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:11:09,125 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:11:09,125 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:11:09,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:11:09,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:11:09,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:11:09,125 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:11:09,132 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:11:09,133 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2071772774] [2020-09-24 16:11:09,133 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:11:09,133 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-09-24 16:11:09,133 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657181437] [2020-09-24 16:11:09,133 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-09-24 16:11:09,133 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:11:09,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-09-24 16:11:09,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=902, Unknown=0, NotChecked=0, Total=992 [2020-09-24 16:11:09,134 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand 32 states. [2020-09-24 16:11:10,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:11:10,496 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2020-09-24 16:11:10,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-24 16:11:10,497 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 68 [2020-09-24 16:11:10,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:11:10,498 INFO L225 Difference]: With dead ends: 77 [2020-09-24 16:11:10,498 INFO L226 Difference]: Without dead ends: 72 [2020-09-24 16:11:10,499 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=90, Invalid=902, Unknown=0, NotChecked=0, Total=992 [2020-09-24 16:11:10,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-09-24 16:11:10,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2020-09-24 16:11:10,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-09-24 16:11:10,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2020-09-24 16:11:10,503 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 68 [2020-09-24 16:11:10,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:11:10,504 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2020-09-24 16:11:10,504 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-09-24 16:11:10,504 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2020-09-24 16:11:10,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-09-24 16:11:10,505 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:11:10,505 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:11:10,505 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-09-24 16:11:10,505 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:11:10,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:11:10,506 INFO L82 PathProgramCache]: Analyzing trace with hash 503745247, now seen corresponding path program 30 times [2020-09-24 16:11:10,506 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:11:10,506 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1128169373] [2020-09-24 16:11:10,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:11:10,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:11:10,657 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:11:10,658 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:11:10,658 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:11:10,658 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:11:10,658 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-09-24 16:11:10,658 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:11:10,658 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 130 [2020-09-24 16:11:10,659 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:11:10,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-09-24 16:11:10,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 16:11:10,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-09-24 16:11:10,659 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:11:11,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:11:11,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:11:11,569 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:11:11,569 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:11:11,569 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:11:11,570 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:11:11,570 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 16:11:11,570 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:11:11,571 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:11:11,571 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:11:11,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:11:11,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:11:11,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:11:11,572 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:11:11,581 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:11:11,582 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1128169373] [2020-09-24 16:11:11,582 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:11:11,582 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-09-24 16:11:11,582 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559715699] [2020-09-24 16:11:11,583 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-09-24 16:11:11,583 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:11:11,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-09-24 16:11:11,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=963, Unknown=0, NotChecked=0, Total=1056 [2020-09-24 16:11:11,584 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 33 states. [2020-09-24 16:11:13,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:11:13,023 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2020-09-24 16:11:13,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-24 16:11:13,023 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 70 [2020-09-24 16:11:13,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:11:13,025 INFO L225 Difference]: With dead ends: 79 [2020-09-24 16:11:13,025 INFO L226 Difference]: Without dead ends: 74 [2020-09-24 16:11:13,026 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=93, Invalid=963, Unknown=0, NotChecked=0, Total=1056 [2020-09-24 16:11:13,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-09-24 16:11:13,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2020-09-24 16:11:13,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-09-24 16:11:13,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2020-09-24 16:11:13,030 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 70 [2020-09-24 16:11:13,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:11:13,031 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2020-09-24 16:11:13,031 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-09-24 16:11:13,031 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2020-09-24 16:11:13,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-09-24 16:11:13,032 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:11:13,032 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:11:13,032 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-09-24 16:11:13,032 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:11:13,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:11:13,033 INFO L82 PathProgramCache]: Analyzing trace with hash -66285154, now seen corresponding path program 31 times [2020-09-24 16:11:13,033 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:11:13,033 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [948457709] [2020-09-24 16:11:13,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:11:13,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:11:13,191 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:11:13,191 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:11:13,191 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:11:13,192 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:11:13,192 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-09-24 16:11:13,192 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:11:13,192 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 135 [2020-09-24 16:11:13,192 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:11:13,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-09-24 16:11:13,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 16:11:13,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-09-24 16:11:13,193 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:11:14,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:11:14,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:11:14,061 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:11:14,061 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:11:14,061 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:11:14,061 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:11:14,061 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 16:11:14,061 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:11:14,062 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:11:14,062 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:11:14,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:11:14,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:11:14,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:11:14,062 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:11:14,070 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:11:14,070 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [948457709] [2020-09-24 16:11:14,071 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:11:14,071 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-09-24 16:11:14,071 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810585133] [2020-09-24 16:11:14,071 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-09-24 16:11:14,071 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:11:14,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-09-24 16:11:14,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=1026, Unknown=0, NotChecked=0, Total=1122 [2020-09-24 16:11:14,072 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand 34 states. [2020-09-24 16:11:15,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:11:15,630 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2020-09-24 16:11:15,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-09-24 16:11:15,630 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 72 [2020-09-24 16:11:15,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:11:15,631 INFO L225 Difference]: With dead ends: 81 [2020-09-24 16:11:15,631 INFO L226 Difference]: Without dead ends: 76 [2020-09-24 16:11:15,632 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=96, Invalid=1026, Unknown=0, NotChecked=0, Total=1122 [2020-09-24 16:11:15,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-09-24 16:11:15,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2020-09-24 16:11:15,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-09-24 16:11:15,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2020-09-24 16:11:15,637 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 72 [2020-09-24 16:11:15,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:11:15,637 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2020-09-24 16:11:15,637 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-09-24 16:11:15,637 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2020-09-24 16:11:15,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-09-24 16:11:15,638 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:11:15,638 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:11:15,639 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-09-24 16:11:15,639 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:11:15,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:11:15,639 INFO L82 PathProgramCache]: Analyzing trace with hash 1890313373, now seen corresponding path program 32 times [2020-09-24 16:11:15,639 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:11:15,639 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2012381951] [2020-09-24 16:11:15,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:11:15,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:11:15,805 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:11:15,806 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:11:15,806 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:11:15,806 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:11:15,806 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-09-24 16:11:15,806 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:11:15,806 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 145 [2020-09-24 16:11:15,807 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:11:15,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-09-24 16:11:15,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 16:11:15,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-09-24 16:11:15,807 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:11:16,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:11:16,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:11:16,748 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:11:16,748 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:11:16,749 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:11:16,749 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:11:16,749 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 16:11:16,749 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:11:16,749 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:11:16,750 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:11:16,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:11:16,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:11:16,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:11:16,750 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:11:16,760 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:11:16,760 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2012381951] [2020-09-24 16:11:16,760 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:11:16,760 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-09-24 16:11:16,760 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985271982] [2020-09-24 16:11:16,761 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-09-24 16:11:16,761 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:11:16,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-09-24 16:11:16,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1091, Unknown=0, NotChecked=0, Total=1190 [2020-09-24 16:11:16,762 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand 35 states. [2020-09-24 16:11:18,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:11:18,402 INFO L93 Difference]: Finished difference Result 83 states and 83 transitions. [2020-09-24 16:11:18,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-24 16:11:18,403 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 74 [2020-09-24 16:11:18,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:11:18,404 INFO L225 Difference]: With dead ends: 83 [2020-09-24 16:11:18,404 INFO L226 Difference]: Without dead ends: 78 [2020-09-24 16:11:18,405 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=99, Invalid=1091, Unknown=0, NotChecked=0, Total=1190 [2020-09-24 16:11:18,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-09-24 16:11:18,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2020-09-24 16:11:18,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-09-24 16:11:18,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2020-09-24 16:11:18,410 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 74 [2020-09-24 16:11:18,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:11:18,411 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2020-09-24 16:11:18,411 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-09-24 16:11:18,411 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2020-09-24 16:11:18,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-09-24 16:11:18,412 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:11:18,412 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:11:18,412 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-09-24 16:11:18,412 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:11:18,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:11:18,413 INFO L82 PathProgramCache]: Analyzing trace with hash 985822172, now seen corresponding path program 33 times [2020-09-24 16:11:18,413 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:11:18,413 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [359391808] [2020-09-24 16:11:18,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:11:18,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:11:18,597 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:11:18,597 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:11:18,597 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:11:18,597 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:11:18,598 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-09-24 16:11:18,598 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:11:18,598 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 163 [2020-09-24 16:11:18,598 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:11:18,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-09-24 16:11:18,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 16:11:18,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-09-24 16:11:18,599 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:11:19,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:11:19,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:11:19,714 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:11:19,714 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:11:19,714 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:11:19,714 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:11:19,715 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 16:11:19,715 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:11:19,715 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:11:19,715 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:11:19,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:11:19,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:11:19,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:11:19,716 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:11:19,726 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:11:19,727 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [359391808] [2020-09-24 16:11:19,727 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:11:19,727 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-09-24 16:11:19,727 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133751972] [2020-09-24 16:11:19,728 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-09-24 16:11:19,728 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:11:19,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-09-24 16:11:19,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1158, Unknown=0, NotChecked=0, Total=1260 [2020-09-24 16:11:19,729 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand 36 states. [2020-09-24 16:11:21,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:11:21,479 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2020-09-24 16:11:21,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-24 16:11:21,480 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 76 [2020-09-24 16:11:21,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:11:21,481 INFO L225 Difference]: With dead ends: 85 [2020-09-24 16:11:21,481 INFO L226 Difference]: Without dead ends: 80 [2020-09-24 16:11:21,482 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=102, Invalid=1158, Unknown=0, NotChecked=0, Total=1260 [2020-09-24 16:11:21,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-09-24 16:11:21,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2020-09-24 16:11:21,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-09-24 16:11:21,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2020-09-24 16:11:21,487 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 76 [2020-09-24 16:11:21,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:11:21,488 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2020-09-24 16:11:21,488 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-09-24 16:11:21,488 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2020-09-24 16:11:21,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-09-24 16:11:21,489 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:11:21,489 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:11:21,489 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-09-24 16:11:21,489 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:11:21,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:11:21,490 INFO L82 PathProgramCache]: Analyzing trace with hash -646828197, now seen corresponding path program 34 times [2020-09-24 16:11:21,490 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:11:21,490 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1625940426] [2020-09-24 16:11:21,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:11:21,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:11:21,704 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:11:21,704 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:11:21,705 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:11:21,705 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:11:21,705 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-09-24 16:11:21,706 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:11:21,706 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 192 [2020-09-24 16:11:21,706 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:11:21,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-09-24 16:11:21,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 16:11:21,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-09-24 16:11:21,708 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 16:11:22,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:11:22,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:11:22,833 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:11:22,833 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:11:22,834 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:11:22,834 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:11:22,834 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 16:11:22,834 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:11:22,834 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:11:22,834 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:11:22,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:11:22,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:11:22,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:11:22,835 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:11:22,846 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:11:22,847 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1625940426] [2020-09-24 16:11:22,847 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:11:22,847 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-09-24 16:11:22,847 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827913725] [2020-09-24 16:11:22,848 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-09-24 16:11:22,848 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:11:22,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-09-24 16:11:22,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1227, Unknown=0, NotChecked=0, Total=1332 [2020-09-24 16:11:22,849 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand 37 states. [2020-09-24 16:11:24,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:11:24,717 INFO L93 Difference]: Finished difference Result 87 states and 87 transitions. [2020-09-24 16:11:24,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-09-24 16:11:24,718 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 78 [2020-09-24 16:11:24,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:11:24,719 INFO L225 Difference]: With dead ends: 87 [2020-09-24 16:11:24,719 INFO L226 Difference]: Without dead ends: 82 [2020-09-24 16:11:24,720 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=105, Invalid=1227, Unknown=0, NotChecked=0, Total=1332 [2020-09-24 16:11:24,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-09-24 16:11:24,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2020-09-24 16:11:24,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-24 16:11:24,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2020-09-24 16:11:24,724 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 78 [2020-09-24 16:11:24,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:11:24,725 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2020-09-24 16:11:24,725 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-09-24 16:11:24,725 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2020-09-24 16:11:24,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-09-24 16:11:24,726 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:11:24,726 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:11:24,726 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-09-24 16:11:24,726 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:11:24,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:11:24,727 INFO L82 PathProgramCache]: Analyzing trace with hash -1960769766, now seen corresponding path program 35 times [2020-09-24 16:11:24,727 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:11:24,727 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [511640165] [2020-09-24 16:11:24,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:11:24,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:11:24,898 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:11:24,898 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:11:24,898 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:11:24,898 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:11:24,899 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-09-24 16:11:24,899 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:11:24,899 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 149 [2020-09-24 16:11:24,899 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:11:24,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-09-24 16:11:24,899 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 16:11:24,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-09-24 16:11:24,900 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:11:26,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:11:26,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:11:26,116 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:11:26,117 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:11:26,117 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:11:26,117 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:11:26,117 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 16:11:26,117 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:11:26,118 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:11:26,118 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:11:26,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:11:26,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:11:26,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:11:26,118 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:11:26,128 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:11:26,128 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [511640165] [2020-09-24 16:11:26,128 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:11:26,128 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-09-24 16:11:26,128 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430778314] [2020-09-24 16:11:26,129 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-09-24 16:11:26,129 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:11:26,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-09-24 16:11:26,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1298, Unknown=0, NotChecked=0, Total=1406 [2020-09-24 16:11:26,130 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand 38 states. [2020-09-24 16:11:28,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:11:28,120 INFO L93 Difference]: Finished difference Result 89 states and 89 transitions. [2020-09-24 16:11:28,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-09-24 16:11:28,121 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 80 [2020-09-24 16:11:28,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:11:28,122 INFO L225 Difference]: With dead ends: 89 [2020-09-24 16:11:28,123 INFO L226 Difference]: Without dead ends: 84 [2020-09-24 16:11:28,123 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=108, Invalid=1298, Unknown=0, NotChecked=0, Total=1406 [2020-09-24 16:11:28,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-09-24 16:11:28,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2020-09-24 16:11:28,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-09-24 16:11:28,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2020-09-24 16:11:28,128 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 80 [2020-09-24 16:11:28,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:11:28,128 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2020-09-24 16:11:28,128 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-09-24 16:11:28,129 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2020-09-24 16:11:28,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-09-24 16:11:28,129 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:11:28,130 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:11:28,130 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-09-24 16:11:28,130 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:11:28,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:11:28,130 INFO L82 PathProgramCache]: Analyzing trace with hash -1938232551, now seen corresponding path program 36 times [2020-09-24 16:11:28,131 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:11:28,131 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1086158219] [2020-09-24 16:11:28,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:11:28,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:11:28,338 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:11:28,338 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:11:28,338 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:11:28,339 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:11:28,339 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-09-24 16:11:28,339 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:11:28,339 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 184 [2020-09-24 16:11:28,339 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:11:28,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-09-24 16:11:28,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 16:11:28,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-09-24 16:11:28,340 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:11:29,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:11:29,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:11:29,492 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:11:29,493 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:11:29,493 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:11:29,493 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:11:29,493 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 16:11:29,494 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:11:29,494 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:11:29,494 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:11:29,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:11:29,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:11:29,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:11:29,494 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:11:29,504 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:11:29,504 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1086158219] [2020-09-24 16:11:29,504 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:11:29,504 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-09-24 16:11:29,505 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276040335] [2020-09-24 16:11:29,505 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-09-24 16:11:29,505 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:11:29,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-09-24 16:11:29,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1371, Unknown=0, NotChecked=0, Total=1482 [2020-09-24 16:11:29,506 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand 39 states. [2020-09-24 16:11:31,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 16:11:31,604 INFO L93 Difference]: Finished difference Result 91 states and 91 transitions. [2020-09-24 16:11:31,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-09-24 16:11:31,604 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 82 [2020-09-24 16:11:31,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 16:11:31,605 INFO L225 Difference]: With dead ends: 91 [2020-09-24 16:11:31,605 INFO L226 Difference]: Without dead ends: 86 [2020-09-24 16:11:31,606 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=111, Invalid=1371, Unknown=0, NotChecked=0, Total=1482 [2020-09-24 16:11:31,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-09-24 16:11:31,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2020-09-24 16:11:31,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-09-24 16:11:31,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2020-09-24 16:11:31,610 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 82 [2020-09-24 16:11:31,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 16:11:31,611 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2020-09-24 16:11:31,611 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-09-24 16:11:31,611 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2020-09-24 16:11:31,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-09-24 16:11:31,612 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 16:11:31,612 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 16:11:31,612 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-09-24 16:11:31,612 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 16:11:31,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 16:11:31,612 INFO L82 PathProgramCache]: Analyzing trace with hash -1754805416, now seen corresponding path program 37 times [2020-09-24 16:11:31,613 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 16:11:31,613 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [782079642] [2020-09-24 16:11:31,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 16:11:31,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:11:31,829 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:11:31,830 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:11:31,830 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:11:31,830 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:11:31,830 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-09-24 16:11:31,830 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:11:31,831 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 194 [2020-09-24 16:11:31,831 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:11:31,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-09-24 16:11:31,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-24 16:11:31,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-09-24 16:11:31,831 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 16:11:33,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 16:11:33,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 16:11:33,212 FATAL L256 erpolLogProxyWrapper]: Difference in size: 0 [2020-09-24 16:11:33,213 FATAL L256 erpolLogProxyWrapper]: Difference in depth: 0 [2020-09-24 16:11:33,213 FATAL L256 erpolLogProxyWrapper]: Difference in width: 0 [2020-09-24 16:11:33,213 FATAL L256 erpolLogProxyWrapper]: Timeout: Unlimited (no timeout set) [2020-09-24 16:11:33,214 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 16:11:33,214 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 16:11:33,214 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 16:11:33,215 FATAL L256 erpolLogProxyWrapper]: Heuristic: FIRST [2020-09-24 16:11:33,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 16:11:33,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 16:11:33,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 16:11:33,216 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 16:11:33,242 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 16:11:33,242 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [782079642] [2020-09-24 16:11:33,242 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 16:11:33,243 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-09-24 16:11:33,243 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013419427] [2020-09-24 16:11:33,243 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-09-24 16:11:33,244 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 16:11:33,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-09-24 16:11:33,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1446, Unknown=0, NotChecked=0, Total=1560 [2020-09-24 16:11:33,245 INFO L87 Difference]: Start difference. First operand 85 states and 85 transitions. Second operand 40 states.