/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 SequenceOfStatements --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 enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=BIGGEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loops-crafted-1/mono-crafted_6.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 16:16:38,953 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 16:16:38,956 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 16:16:38,994 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 16:16:38,995 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 16:16:39,003 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 16:16:39,005 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 16:16:39,008 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 16:16:39,011 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 16:16:39,014 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 16:16:39,014 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 16:16:39,016 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 16:16:39,016 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 16:16:39,019 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 16:16:39,022 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 16:16:39,023 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 16:16:39,025 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 16:16:39,026 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 16:16:39,027 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 16:16:39,035 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 16:16:39,038 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 16:16:39,039 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 16:16:39,039 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 16:16:39,040 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 16:16:39,052 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 16:16:39,052 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 16:16:39,052 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 16:16:39,058 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 16:16:39,059 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 16:16:39,060 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 16:16:39,060 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 16:16:39,061 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 16:16:39,063 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 16:16:39,064 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 16:16:39,068 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 16:16:39,069 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 16:16:39,069 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 16:16:39,069 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 16:16:39,070 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 16:16:39,071 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 16:16:39,072 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 16:16:39,072 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 [2020-10-12 16:16:39,115 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 16:16:39,116 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 16:16:39,117 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 16:16:39,117 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 16:16:39,117 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 16:16:39,117 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 16:16:39,118 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 16:16:39,118 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 16:16:39,119 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 16:16:39,119 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 16:16:39,120 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 16:16:39,120 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 16:16:39,120 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 16:16:39,120 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 16:16:39,120 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 16:16:39,121 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 16:16:39,121 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 16:16:39,122 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 16:16:39,122 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 16:16:39,122 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 16:16:39,123 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 16:16:39,123 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 16:16:39,123 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 16:16:39,123 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 16:16:39,123 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 16:16:39,123 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 16:16:39,124 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 16:16:39,124 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 16:16:39,124 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 16:16:39,124 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 -> SequenceOfStatements 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;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; [2020-10-12 16:16:39,407 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 16:16:39,420 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 16:16:39,425 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 16:16:39,427 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 16:16:39,428 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 16:16:39,428 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/mono-crafted_6.c [2020-10-12 16:16:39,513 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cae66629c/17e92b19be784845bbac7928e287872b/FLAGee61b404c [2020-10-12 16:16:40,006 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 16:16:40,007 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops-crafted-1/mono-crafted_6.c [2020-10-12 16:16:40,012 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cae66629c/17e92b19be784845bbac7928e287872b/FLAGee61b404c [2020-10-12 16:16:40,420 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/cae66629c/17e92b19be784845bbac7928e287872b [2020-10-12 16:16:40,429 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 16:16:40,431 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 16:16:40,432 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 16:16:40,432 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 16:16:40,436 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 16:16:40,437 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 04:16:40" (1/1) ... [2020-10-12 16:16:40,440 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@69fa69d6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:16:40, skipping insertion in model container [2020-10-12 16:16:40,440 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 04:16:40" (1/1) ... [2020-10-12 16:16:40,448 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 16:16:40,465 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 16:16:40,629 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 16:16:40,634 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 16:16:40,649 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 16:16:40,664 INFO L208 MainTranslator]: Completed translation [2020-10-12 16:16:40,664 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:16:40 WrapperNode [2020-10-12 16:16:40,664 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 16:16:40,665 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 16:16:40,665 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 16:16:40,666 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 16:16:40,678 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:16:40" (1/1) ... [2020-10-12 16:16:40,678 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:16:40" (1/1) ... [2020-10-12 16:16:40,758 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:16:40" (1/1) ... [2020-10-12 16:16:40,758 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:16:40" (1/1) ... [2020-10-12 16:16:40,762 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:16:40" (1/1) ... [2020-10-12 16:16:40,767 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:16:40" (1/1) ... [2020-10-12 16:16:40,768 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:16:40" (1/1) ... [2020-10-12 16:16:40,769 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 16:16:40,770 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 16:16:40,770 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 16:16:40,770 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 16:16:40,771 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:16:40" (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 [2020-10-12 16:16:40,831 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 16:16:40,832 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 16:16:40,832 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-12 16:16:40,832 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 16:16:40,832 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 16:16:40,832 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-12 16:16:40,832 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 16:16:40,832 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 16:16:40,833 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 16:16:41,000 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 16:16:41,001 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-12 16:16:41,005 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 04:16:41 BoogieIcfgContainer [2020-10-12 16:16:41,005 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 16:16:41,007 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 16:16:41,007 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 16:16:41,010 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 16:16:41,010 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 04:16:40" (1/3) ... [2020-10-12 16:16:41,011 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2db52342 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 04:16:41, skipping insertion in model container [2020-10-12 16:16:41,011 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 04:16:40" (2/3) ... [2020-10-12 16:16:41,012 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2db52342 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 04:16:41, skipping insertion in model container [2020-10-12 16:16:41,012 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 04:16:41" (3/3) ... [2020-10-12 16:16:41,013 INFO L109 eAbstractionObserver]: Analyzing ICFG mono-crafted_6.c [2020-10-12 16:16:41,024 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 16:16:41,032 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 16:16:41,048 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 16:16:41,110 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 16:16:41,111 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 16:16:41,111 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 16:16:41,111 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 16:16:41,111 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 16:16:41,111 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 16:16:41,112 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 16:16:41,112 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 16:16:41,136 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states. [2020-10-12 16:16:41,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-12 16:16:41,144 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:16:41,145 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:16:41,145 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:16:41,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:16:41,152 INFO L82 PathProgramCache]: Analyzing trace with hash 1560044592, now seen corresponding path program 1 times [2020-10-12 16:16:41,161 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:16:41,174 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [650493465] [2020-10-12 16:16:41,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:16:41,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:41,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:41,329 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:41,329 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-12 16:16:41,329 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:16:41,330 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 62 [2020-10-12 16:16:41,332 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:41,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:16:41,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:16:41,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 16:16:41,333 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-12 16:16:41,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:16:41,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:41,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:41,377 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:41,378 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:16:41,378 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:16:41,378 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 16:16:41,378 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:41,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:16:41,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:16:41,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:16:41,379 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:16:41,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:16:41,385 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [650493465] [2020-10-12 16:16:41,387 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 16:16:41,388 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-12 16:16:41,389 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141231489] [2020-10-12 16:16:41,397 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-12 16:16:41,397 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:16:41,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-12 16:16:41,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-12 16:16:41,413 INFO L87 Difference]: Start difference. First operand 21 states. Second operand 3 states. [2020-10-12 16:16:41,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:16:41,466 INFO L93 Difference]: Finished difference Result 39 states and 51 transitions. [2020-10-12 16:16:41,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-12 16:16:41,468 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2020-10-12 16:16:41,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:16:41,477 INFO L225 Difference]: With dead ends: 39 [2020-10-12 16:16:41,477 INFO L226 Difference]: Without dead ends: 16 [2020-10-12 16:16:41,481 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 [2020-10-12 16:16:41,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-10-12 16:16:41,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-10-12 16:16:41,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-12 16:16:41,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2020-10-12 16:16:41,515 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 10 [2020-10-12 16:16:41,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:16:41,515 INFO L479 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2020-10-12 16:16:41,516 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-12 16:16:41,516 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2020-10-12 16:16:41,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-12 16:16:41,517 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:16:41,517 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:16:41,517 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 16:16:41,517 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:16:41,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:16:41,518 INFO L82 PathProgramCache]: Analyzing trace with hash 1098177517, now seen corresponding path program 1 times [2020-10-12 16:16:41,518 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:16:41,518 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [250932814] [2020-10-12 16:16:41,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:16:41,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:41,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:41,571 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:41,571 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-12 16:16:41,572 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:16:41,572 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 39 [2020-10-12 16:16:41,572 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:41,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 16:16:41,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 16:16:41,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 16:16:41,574 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:16:41,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:16:41,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:41,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:41,594 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:41,595 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:16:41,595 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:16:41,595 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 16:16:41,595 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:41,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:16:41,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:16:41,596 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:16:41,597 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:16:41,601 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:16:41,601 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [250932814] [2020-10-12 16:16:41,602 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 16:16:41,602 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-12 16:16:41,603 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174681060] [2020-10-12 16:16:41,604 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-12 16:16:41,605 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:16:41,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-12 16:16:41,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-12 16:16:41,606 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 3 states. [2020-10-12 16:16:41,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:16:41,636 INFO L93 Difference]: Finished difference Result 28 states and 35 transitions. [2020-10-12 16:16:41,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-12 16:16:41,637 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 12 [2020-10-12 16:16:41,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:16:41,638 INFO L225 Difference]: With dead ends: 28 [2020-10-12 16:16:41,638 INFO L226 Difference]: Without dead ends: 19 [2020-10-12 16:16:41,639 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 [2020-10-12 16:16:41,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-10-12 16:16:41,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-10-12 16:16:41,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-12 16:16:41,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2020-10-12 16:16:41,646 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 12 [2020-10-12 16:16:41,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:16:41,647 INFO L479 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2020-10-12 16:16:41,647 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-12 16:16:41,647 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2020-10-12 16:16:41,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-12 16:16:41,648 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:16:41,648 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:16:41,649 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 16:16:41,649 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:16:41,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:16:41,649 INFO L82 PathProgramCache]: Analyzing trace with hash -271942908, now seen corresponding path program 1 times [2020-10-12 16:16:41,650 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:16:41,650 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [348199513] [2020-10-12 16:16:41,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:16:41,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:41,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:41,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:41,832 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:41,833 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-12 16:16:41,833 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:16:41,833 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 172 [2020-10-12 16:16:41,834 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:41,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 16:16:41,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:16:41,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-12 16:16:41,835 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:16:41,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:16:41,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:41,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:41,859 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:41,859 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:16:41,859 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:16:41,860 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 16:16:41,860 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:41,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:16:41,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:16:41,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:16:41,861 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:16:41,864 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:16:41,864 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [348199513] [2020-10-12 16:16:41,865 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:16:41,865 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-10-12 16:16:41,865 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432621843] [2020-10-12 16:16:41,866 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-12 16:16:41,866 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:16:41,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-12 16:16:41,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-10-12 16:16:41,867 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand 4 states. [2020-10-12 16:16:41,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:16:41,896 INFO L93 Difference]: Finished difference Result 33 states and 40 transitions. [2020-10-12 16:16:41,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-12 16:16:41,897 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-10-12 16:16:41,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:16:41,898 INFO L225 Difference]: With dead ends: 33 [2020-10-12 16:16:41,898 INFO L226 Difference]: Without dead ends: 21 [2020-10-12 16:16:41,898 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 [2020-10-12 16:16:41,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-10-12 16:16:41,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-10-12 16:16:41,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-12 16:16:41,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2020-10-12 16:16:41,904 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 16 [2020-10-12 16:16:41,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:16:41,904 INFO L479 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2020-10-12 16:16:41,905 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-12 16:16:41,905 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2020-10-12 16:16:41,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-12 16:16:41,906 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:16:41,906 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:16:41,906 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-12 16:16:41,906 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:16:41,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:16:41,907 INFO L82 PathProgramCache]: Analyzing trace with hash -1379438335, now seen corresponding path program 2 times [2020-10-12 16:16:41,907 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:16:41,907 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1574939545] [2020-10-12 16:16:41,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:16:41,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:41,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:41,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:42,063 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:42,063 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-12 16:16:42,064 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:16:42,064 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 146 [2020-10-12 16:16:42,064 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:42,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 16:16:42,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:16:42,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-12 16:16:42,069 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-12 16:16:42,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:16:42,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:42,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:42,113 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:42,113 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:16:42,113 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:16:42,114 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 16:16:42,114 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:42,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:16:42,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:16:42,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:16:42,116 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:16:42,122 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:16:42,123 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1574939545] [2020-10-12 16:16:42,128 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:16:42,128 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-12 16:16:42,129 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18348809] [2020-10-12 16:16:42,129 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 16:16:42,130 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:16:42,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 16:16:42,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-10-12 16:16:42,133 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand 5 states. [2020-10-12 16:16:42,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:16:42,182 INFO L93 Difference]: Finished difference Result 35 states and 42 transitions. [2020-10-12 16:16:42,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 16:16:42,183 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-10-12 16:16:42,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:16:42,184 INFO L225 Difference]: With dead ends: 35 [2020-10-12 16:16:42,184 INFO L226 Difference]: Without dead ends: 23 [2020-10-12 16:16:42,185 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2020-10-12 16:16:42,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-12 16:16:42,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-10-12 16:16:42,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-12 16:16:42,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2020-10-12 16:16:42,192 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 18 [2020-10-12 16:16:42,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:16:42,192 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2020-10-12 16:16:42,193 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 16:16:42,193 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2020-10-12 16:16:42,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-12 16:16:42,194 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:16:42,194 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:16:42,194 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-12 16:16:42,194 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:16:42,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:16:42,195 INFO L82 PathProgramCache]: Analyzing trace with hash -530654274, now seen corresponding path program 3 times [2020-10-12 16:16:42,195 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:16:42,196 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1600946068] [2020-10-12 16:16:42,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:16:42,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:42,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:42,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:42,339 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:42,340 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-12 16:16:42,341 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:16:42,341 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 133 [2020-10-12 16:16:42,341 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:42,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 16:16:42,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:16:42,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-12 16:16:42,342 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:16:42,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:16:42,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:42,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:42,401 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:42,402 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:16:42,403 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:16:42,403 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 16:16:42,403 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:42,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:16:42,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:16:42,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:16:42,404 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:16:42,407 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:16:42,408 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1600946068] [2020-10-12 16:16:42,408 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:16:42,408 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-12 16:16:42,409 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607035098] [2020-10-12 16:16:42,410 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 16:16:42,410 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:16:42,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 16:16:42,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-12 16:16:42,412 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand 6 states. [2020-10-12 16:16:42,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:16:42,480 INFO L93 Difference]: Finished difference Result 37 states and 44 transitions. [2020-10-12 16:16:42,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-12 16:16:42,482 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-10-12 16:16:42,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:16:42,483 INFO L225 Difference]: With dead ends: 37 [2020-10-12 16:16:42,483 INFO L226 Difference]: Without dead ends: 25 [2020-10-12 16:16:42,484 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-12 16:16:42,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-12 16:16:42,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-10-12 16:16:42,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-12 16:16:42,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2020-10-12 16:16:42,495 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 20 [2020-10-12 16:16:42,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:16:42,496 INFO L479 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2020-10-12 16:16:42,497 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 16:16:42,497 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2020-10-12 16:16:42,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-12 16:16:42,499 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:16:42,499 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:16:42,500 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-12 16:16:42,500 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:16:42,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:16:42,500 INFO L82 PathProgramCache]: Analyzing trace with hash -892957893, now seen corresponding path program 4 times [2020-10-12 16:16:42,501 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:16:42,502 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [184490267] [2020-10-12 16:16:42,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:16:42,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:42,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:42,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:42,695 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:42,695 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-12 16:16:42,696 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:16:42,696 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 172 [2020-10-12 16:16:42,696 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:42,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 16:16:42,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:16:42,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-12 16:16:42,698 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:16:42,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:16:42,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:42,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:42,769 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:42,769 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:16:42,769 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:16:42,770 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 16:16:42,771 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:42,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:16:42,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:16:42,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:16:42,772 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:16:42,776 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:16:42,777 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [184490267] [2020-10-12 16:16:42,778 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:16:42,779 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-12 16:16:42,779 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100271110] [2020-10-12 16:16:42,780 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 16:16:42,780 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:16:42,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 16:16:42,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-10-12 16:16:42,782 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand 7 states. [2020-10-12 16:16:42,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:16:42,857 INFO L93 Difference]: Finished difference Result 39 states and 46 transitions. [2020-10-12 16:16:42,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 16:16:42,859 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2020-10-12 16:16:42,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:16:42,860 INFO L225 Difference]: With dead ends: 39 [2020-10-12 16:16:42,860 INFO L226 Difference]: Without dead ends: 27 [2020-10-12 16:16:42,866 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-10-12 16:16:42,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-12 16:16:42,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-10-12 16:16:42,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-12 16:16:42,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2020-10-12 16:16:42,881 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 22 [2020-10-12 16:16:42,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:16:42,883 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2020-10-12 16:16:42,883 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 16:16:42,883 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2020-10-12 16:16:42,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-12 16:16:42,884 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:16:42,885 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:16:42,889 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-12 16:16:42,890 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:16:42,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:16:42,890 INFO L82 PathProgramCache]: Analyzing trace with hash -1174384776, now seen corresponding path program 5 times [2020-10-12 16:16:42,890 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:16:42,891 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1233883707] [2020-10-12 16:16:42,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:16:42,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:42,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:42,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:43,068 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:43,069 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-12 16:16:43,069 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:16:43,070 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 167 [2020-10-12 16:16:43,070 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:43,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 16:16:43,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:16:43,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-12 16:16:43,073 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-12 16:16:43,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:16:43,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:43,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:43,149 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:43,150 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:16:43,150 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:16:43,150 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 16:16:43,151 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:43,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:16:43,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:16:43,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:16:43,152 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:16:43,157 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:16:43,157 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1233883707] [2020-10-12 16:16:43,157 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:16:43,158 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-12 16:16:43,159 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820199453] [2020-10-12 16:16:43,160 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 16:16:43,161 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:16:43,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 16:16:43,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-10-12 16:16:43,162 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand 8 states. [2020-10-12 16:16:43,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:16:43,214 INFO L93 Difference]: Finished difference Result 41 states and 48 transitions. [2020-10-12 16:16:43,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-12 16:16:43,215 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 24 [2020-10-12 16:16:43,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:16:43,216 INFO L225 Difference]: With dead ends: 41 [2020-10-12 16:16:43,216 INFO L226 Difference]: Without dead ends: 29 [2020-10-12 16:16:43,217 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-10-12 16:16:43,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-12 16:16:43,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-10-12 16:16:43,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-12 16:16:43,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2020-10-12 16:16:43,229 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 24 [2020-10-12 16:16:43,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:16:43,229 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2020-10-12 16:16:43,229 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 16:16:43,229 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2020-10-12 16:16:43,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-12 16:16:43,234 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:16:43,234 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:16:43,235 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-12 16:16:43,235 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:16:43,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:16:43,235 INFO L82 PathProgramCache]: Analyzing trace with hash -1042679691, now seen corresponding path program 6 times [2020-10-12 16:16:43,236 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:16:43,236 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [154001845] [2020-10-12 16:16:43,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:16:43,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:43,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:43,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:43,408 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:43,408 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-12 16:16:43,408 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:16:43,409 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 155 [2020-10-12 16:16:43,409 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:43,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 16:16:43,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:16:43,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-12 16:16:43,410 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:16:43,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:16:43,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:43,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:43,479 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:43,480 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:16:43,480 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:16:43,480 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:16:43,480 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:43,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:16:43,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:16:43,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:16:43,481 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:16:43,483 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:16:43,483 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [154001845] [2020-10-12 16:16:43,483 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:16:43,483 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-12 16:16:43,484 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873412318] [2020-10-12 16:16:43,484 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-12 16:16:43,484 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:16:43,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-12 16:16:43,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-10-12 16:16:43,485 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand 9 states. [2020-10-12 16:16:43,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:16:43,535 INFO L93 Difference]: Finished difference Result 43 states and 50 transitions. [2020-10-12 16:16:43,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 16:16:43,536 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2020-10-12 16:16:43,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:16:43,537 INFO L225 Difference]: With dead ends: 43 [2020-10-12 16:16:43,537 INFO L226 Difference]: Without dead ends: 31 [2020-10-12 16:16:43,538 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2020-10-12 16:16:43,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-12 16:16:43,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-10-12 16:16:43,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-12 16:16:43,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2020-10-12 16:16:43,543 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 26 [2020-10-12 16:16:43,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:16:43,544 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2020-10-12 16:16:43,544 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-12 16:16:43,544 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2020-10-12 16:16:43,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-12 16:16:43,545 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:16:43,545 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:16:43,545 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-12 16:16:43,546 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:16:43,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:16:43,546 INFO L82 PathProgramCache]: Analyzing trace with hash 971855410, now seen corresponding path program 7 times [2020-10-12 16:16:43,546 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:16:43,546 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [56948481] [2020-10-12 16:16:43,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:16:43,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:43,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:43,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:43,700 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:43,700 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-12 16:16:43,701 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:16:43,701 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 147 [2020-10-12 16:16:43,701 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:43,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 16:16:43,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:16:43,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-12 16:16:43,702 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:16:43,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:16:43,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:43,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:43,780 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:43,780 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:16:43,781 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:16:43,781 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:16:43,781 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:43,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:16:43,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:16:43,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:16:43,782 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:16:43,784 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:16:43,788 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [56948481] [2020-10-12 16:16:43,788 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:16:43,789 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 16:16:43,789 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920813749] [2020-10-12 16:16:43,789 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 16:16:43,789 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:16:43,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 16:16:43,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-10-12 16:16:43,792 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand 10 states. [2020-10-12 16:16:43,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:16:43,852 INFO L93 Difference]: Finished difference Result 45 states and 52 transitions. [2020-10-12 16:16:43,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-12 16:16:43,853 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2020-10-12 16:16:43,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:16:43,854 INFO L225 Difference]: With dead ends: 45 [2020-10-12 16:16:43,854 INFO L226 Difference]: Without dead ends: 33 [2020-10-12 16:16:43,855 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2020-10-12 16:16:43,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-12 16:16:43,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-10-12 16:16:43,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-12 16:16:43,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2020-10-12 16:16:43,860 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 28 [2020-10-12 16:16:43,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:16:43,860 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2020-10-12 16:16:43,860 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 16:16:43,860 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2020-10-12 16:16:43,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-12 16:16:43,861 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:16:43,861 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:16:43,861 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-12 16:16:43,862 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:16:43,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:16:43,862 INFO L82 PathProgramCache]: Analyzing trace with hash -90163025, now seen corresponding path program 8 times [2020-10-12 16:16:43,862 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:16:43,862 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [72458334] [2020-10-12 16:16:43,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:16:43,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:43,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:43,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:44,006 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:44,006 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-12 16:16:44,006 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:16:44,007 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 136 [2020-10-12 16:16:44,007 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:44,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 16:16:44,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:16:44,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-12 16:16:44,007 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:16:44,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:16:44,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:44,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:44,083 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:44,083 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:16:44,083 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:16:44,083 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:16:44,083 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:44,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:16:44,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:16:44,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:16:44,084 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:16:44,086 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:16:44,087 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [72458334] [2020-10-12 16:16:44,087 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:16:44,087 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-12 16:16:44,087 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986623792] [2020-10-12 16:16:44,088 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 16:16:44,088 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:16:44,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 16:16:44,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-10-12 16:16:44,088 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand 11 states. [2020-10-12 16:16:44,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:16:44,176 INFO L93 Difference]: Finished difference Result 47 states and 54 transitions. [2020-10-12 16:16:44,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-12 16:16:44,177 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 30 [2020-10-12 16:16:44,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:16:44,177 INFO L225 Difference]: With dead ends: 47 [2020-10-12 16:16:44,177 INFO L226 Difference]: Without dead ends: 35 [2020-10-12 16:16:44,178 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2020-10-12 16:16:44,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-12 16:16:44,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-10-12 16:16:44,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-12 16:16:44,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2020-10-12 16:16:44,183 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 30 [2020-10-12 16:16:44,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:16:44,183 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2020-10-12 16:16:44,184 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 16:16:44,184 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2020-10-12 16:16:44,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-12 16:16:44,185 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:16:44,185 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:16:44,185 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-12 16:16:44,185 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:16:44,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:16:44,186 INFO L82 PathProgramCache]: Analyzing trace with hash 1512337388, now seen corresponding path program 9 times [2020-10-12 16:16:44,186 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:16:44,186 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [142935105] [2020-10-12 16:16:44,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:16:44,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:44,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:44,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:44,355 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:44,355 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-12 16:16:44,355 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:16:44,356 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 160 [2020-10-12 16:16:44,356 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:44,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 16:16:44,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:16:44,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-12 16:16:44,356 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:16:44,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:16:44,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:44,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:44,439 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:44,440 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:16:44,440 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:16:44,440 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:16:44,440 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:44,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:16:44,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:16:44,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:16:44,441 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:16:44,443 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:16:44,443 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [142935105] [2020-10-12 16:16:44,444 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:16:44,444 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 16:16:44,444 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869877247] [2020-10-12 16:16:44,444 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 16:16:44,444 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:16:44,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 16:16:44,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-10-12 16:16:44,445 INFO L87 Difference]: Start difference. First operand 35 states and 38 transitions. Second operand 12 states. [2020-10-12 16:16:44,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:16:44,491 INFO L93 Difference]: Finished difference Result 49 states and 56 transitions. [2020-10-12 16:16:44,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 16:16:44,492 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 32 [2020-10-12 16:16:44,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:16:44,492 INFO L225 Difference]: With dead ends: 49 [2020-10-12 16:16:44,492 INFO L226 Difference]: Without dead ends: 37 [2020-10-12 16:16:44,493 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2020-10-12 16:16:44,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-12 16:16:44,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-10-12 16:16:44,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-12 16:16:44,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 40 transitions. [2020-10-12 16:16:44,498 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 40 transitions. Word has length 32 [2020-10-12 16:16:44,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:16:44,498 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 40 transitions. [2020-10-12 16:16:44,498 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 16:16:44,498 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 40 transitions. [2020-10-12 16:16:44,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-12 16:16:44,499 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:16:44,500 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:16:44,500 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-12 16:16:44,500 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:16:44,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:16:44,500 INFO L82 PathProgramCache]: Analyzing trace with hash -378024983, now seen corresponding path program 10 times [2020-10-12 16:16:44,500 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:16:44,501 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1375849366] [2020-10-12 16:16:44,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:16:44,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:44,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:44,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:44,669 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:44,669 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-12 16:16:44,669 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:16:44,670 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 161 [2020-10-12 16:16:44,670 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:44,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 16:16:44,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:16:44,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-12 16:16:44,670 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:16:44,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:16:44,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:44,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:44,781 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:44,781 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:16:44,781 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:16:44,781 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:16:44,781 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:44,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:16:44,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:16:44,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:16:44,782 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:16:44,784 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 11 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:16:44,785 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1375849366] [2020-10-12 16:16:44,785 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:16:44,785 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-12 16:16:44,785 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384811759] [2020-10-12 16:16:44,786 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-12 16:16:44,786 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:16:44,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-12 16:16:44,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-10-12 16:16:44,787 INFO L87 Difference]: Start difference. First operand 37 states and 40 transitions. Second operand 13 states. [2020-10-12 16:16:44,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:16:44,850 INFO L93 Difference]: Finished difference Result 51 states and 58 transitions. [2020-10-12 16:16:44,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 16:16:44,850 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 34 [2020-10-12 16:16:44,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:16:44,851 INFO L225 Difference]: With dead ends: 51 [2020-10-12 16:16:44,851 INFO L226 Difference]: Without dead ends: 39 [2020-10-12 16:16:44,852 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2020-10-12 16:16:44,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-12 16:16:44,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-10-12 16:16:44,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-12 16:16:44,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2020-10-12 16:16:44,857 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 34 [2020-10-12 16:16:44,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:16:44,857 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2020-10-12 16:16:44,858 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-12 16:16:44,858 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2020-10-12 16:16:44,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-12 16:16:44,859 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:16:44,859 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:16:44,859 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-12 16:16:44,859 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:16:44,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:16:44,860 INFO L82 PathProgramCache]: Analyzing trace with hash -245097306, now seen corresponding path program 11 times [2020-10-12 16:16:44,860 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:16:44,860 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [527056814] [2020-10-12 16:16:44,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:16:44,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:44,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:44,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:45,055 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:45,056 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-12 16:16:45,056 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:16:45,056 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 188 [2020-10-12 16:16:45,057 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:45,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 16:16:45,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:16:45,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-12 16:16:45,057 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:16:45,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:16:45,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:45,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:45,170 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:45,170 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:16:45,170 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:16:45,171 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:16:45,171 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:45,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:16:45,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:16:45,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:16:45,172 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:16:45,174 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 12 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:16:45,174 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [527056814] [2020-10-12 16:16:45,174 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:16:45,175 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-12 16:16:45,175 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629361667] [2020-10-12 16:16:45,175 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-12 16:16:45,176 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:16:45,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-12 16:16:45,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-10-12 16:16:45,176 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand 14 states. [2020-10-12 16:16:45,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:16:45,223 INFO L93 Difference]: Finished difference Result 53 states and 60 transitions. [2020-10-12 16:16:45,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-12 16:16:45,224 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 36 [2020-10-12 16:16:45,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:16:45,225 INFO L225 Difference]: With dead ends: 53 [2020-10-12 16:16:45,225 INFO L226 Difference]: Without dead ends: 41 [2020-10-12 16:16:45,226 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2020-10-12 16:16:45,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-12 16:16:45,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-10-12 16:16:45,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-12 16:16:45,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2020-10-12 16:16:45,231 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 36 [2020-10-12 16:16:45,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:16:45,231 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2020-10-12 16:16:45,231 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-12 16:16:45,232 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2020-10-12 16:16:45,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-12 16:16:45,233 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:16:45,233 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:16:45,233 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-12 16:16:45,233 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:16:45,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:16:45,234 INFO L82 PathProgramCache]: Analyzing trace with hash -1350618589, now seen corresponding path program 12 times [2020-10-12 16:16:45,234 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:16:45,234 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1894677073] [2020-10-12 16:16:45,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:16:45,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:45,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:45,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:45,481 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:45,482 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-12 16:16:45,482 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:16:45,482 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 240 [2020-10-12 16:16:45,482 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:45,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 16:16:45,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:16:45,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-12 16:16:45,483 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:16:45,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:16:45,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:45,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:45,612 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:45,613 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:16:45,613 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:16:45,613 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:16:45,613 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:45,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:16:45,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:16:45,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:16:45,614 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:16:45,616 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 13 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:16:45,616 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1894677073] [2020-10-12 16:16:45,617 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:16:45,617 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-12 16:16:45,617 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78098032] [2020-10-12 16:16:45,617 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-12 16:16:45,618 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:16:45,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-12 16:16:45,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-10-12 16:16:45,618 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand 15 states. [2020-10-12 16:16:45,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:16:45,691 INFO L93 Difference]: Finished difference Result 55 states and 62 transitions. [2020-10-12 16:16:45,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-12 16:16:45,691 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 38 [2020-10-12 16:16:45,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:16:45,692 INFO L225 Difference]: With dead ends: 55 [2020-10-12 16:16:45,693 INFO L226 Difference]: Without dead ends: 43 [2020-10-12 16:16:45,693 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2020-10-12 16:16:45,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-12 16:16:45,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-10-12 16:16:45,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-12 16:16:45,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 46 transitions. [2020-10-12 16:16:45,698 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 46 transitions. Word has length 38 [2020-10-12 16:16:45,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:16:45,699 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 46 transitions. [2020-10-12 16:16:45,699 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-12 16:16:45,699 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 46 transitions. [2020-10-12 16:16:45,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-12 16:16:45,700 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:16:45,700 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:16:45,700 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-12 16:16:45,700 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:16:45,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:16:45,701 INFO L82 PathProgramCache]: Analyzing trace with hash 1395317856, now seen corresponding path program 13 times [2020-10-12 16:16:45,701 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:16:45,701 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [978450826] [2020-10-12 16:16:45,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:16:45,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:45,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:45,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:45,940 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:45,940 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-12 16:16:45,940 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:16:45,941 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 231 [2020-10-12 16:16:45,941 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:45,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-12 16:16:45,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:16:45,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-12 16:16:45,942 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:16:46,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:16:46,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:46,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:46,084 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:46,084 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:16:46,084 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:16:46,085 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:16:46,085 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:46,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:16:46,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:16:46,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:16:46,086 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:16:46,088 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 14 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:16:46,088 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [978450826] [2020-10-12 16:16:46,089 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:16:46,089 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-12 16:16:46,089 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206723573] [2020-10-12 16:16:46,089 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-12 16:16:46,089 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:16:46,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-12 16:16:46,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-10-12 16:16:46,090 INFO L87 Difference]: Start difference. First operand 43 states and 46 transitions. Second operand 16 states. [2020-10-12 16:16:46,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:16:46,176 INFO L93 Difference]: Finished difference Result 57 states and 64 transitions. [2020-10-12 16:16:46,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-12 16:16:46,177 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 40 [2020-10-12 16:16:46,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:16:46,178 INFO L225 Difference]: With dead ends: 57 [2020-10-12 16:16:46,178 INFO L226 Difference]: Without dead ends: 45 [2020-10-12 16:16:46,178 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2020-10-12 16:16:46,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-12 16:16:46,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-10-12 16:16:46,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-12 16:16:46,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 48 transitions. [2020-10-12 16:16:46,189 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 48 transitions. Word has length 40 [2020-10-12 16:16:46,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:16:46,191 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 48 transitions. [2020-10-12 16:16:46,191 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-12 16:16:46,191 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 48 transitions. [2020-10-12 16:16:46,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-12 16:16:46,192 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:16:46,192 INFO L422 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:16:46,192 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-12 16:16:46,193 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:16:46,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:16:46,193 INFO L82 PathProgramCache]: Analyzing trace with hash -1164645539, now seen corresponding path program 14 times [2020-10-12 16:16:46,193 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:16:46,193 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1708837261] [2020-10-12 16:16:46,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:16:46,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:46,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:46,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:46,540 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:46,541 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-12 16:16:46,541 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:16:46,541 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 336 [2020-10-12 16:16:46,542 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:46,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-12 16:16:46,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:16:46,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-12 16:16:46,543 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:16:46,729 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:16:46,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:46,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:46,731 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:46,731 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:16:46,731 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:16:46,731 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:16:46,732 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:46,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:16:46,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:16:46,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:16:46,732 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:16:46,735 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 15 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:16:46,735 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1708837261] [2020-10-12 16:16:46,737 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:16:46,737 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-12 16:16:46,738 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875553464] [2020-10-12 16:16:46,738 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-12 16:16:46,739 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:16:46,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-12 16:16:46,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-10-12 16:16:46,740 INFO L87 Difference]: Start difference. First operand 45 states and 48 transitions. Second operand 17 states. [2020-10-12 16:16:46,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:16:46,817 INFO L93 Difference]: Finished difference Result 59 states and 66 transitions. [2020-10-12 16:16:46,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-12 16:16:46,817 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 42 [2020-10-12 16:16:46,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:16:46,818 INFO L225 Difference]: With dead ends: 59 [2020-10-12 16:16:46,818 INFO L226 Difference]: Without dead ends: 47 [2020-10-12 16:16:46,819 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2020-10-12 16:16:46,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-12 16:16:46,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2020-10-12 16:16:46,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-12 16:16:46,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 50 transitions. [2020-10-12 16:16:46,827 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 50 transitions. Word has length 42 [2020-10-12 16:16:46,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:16:46,830 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 50 transitions. [2020-10-12 16:16:46,830 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-12 16:16:46,830 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 50 transitions. [2020-10-12 16:16:46,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-12 16:16:46,831 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:16:46,831 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:16:46,831 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-12 16:16:46,832 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:16:46,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:16:46,832 INFO L82 PathProgramCache]: Analyzing trace with hash -273207526, now seen corresponding path program 15 times [2020-10-12 16:16:46,832 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:16:46,832 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1978212705] [2020-10-12 16:16:46,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:16:46,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:46,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:46,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:47,135 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:47,137 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-12 16:16:47,137 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:16:47,137 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 295 [2020-10-12 16:16:47,137 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:47,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-12 16:16:47,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:16:47,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-12 16:16:47,138 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:16:47,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:16:47,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:47,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:47,341 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:47,341 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:16:47,341 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:16:47,341 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:16:47,341 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:47,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:16:47,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:16:47,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:16:47,342 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:16:47,344 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 16 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:16:47,344 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1978212705] [2020-10-12 16:16:47,344 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:16:47,344 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-12 16:16:47,345 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63072102] [2020-10-12 16:16:47,345 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-12 16:16:47,345 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:16:47,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-12 16:16:47,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-10-12 16:16:47,346 INFO L87 Difference]: Start difference. First operand 47 states and 50 transitions. Second operand 18 states. [2020-10-12 16:16:47,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:16:47,465 INFO L93 Difference]: Finished difference Result 61 states and 68 transitions. [2020-10-12 16:16:47,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-12 16:16:47,466 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 44 [2020-10-12 16:16:47,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:16:47,467 INFO L225 Difference]: With dead ends: 61 [2020-10-12 16:16:47,467 INFO L226 Difference]: Without dead ends: 49 [2020-10-12 16:16:47,468 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2020-10-12 16:16:47,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-12 16:16:47,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2020-10-12 16:16:47,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-12 16:16:47,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 52 transitions. [2020-10-12 16:16:47,473 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 52 transitions. Word has length 44 [2020-10-12 16:16:47,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:16:47,473 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 52 transitions. [2020-10-12 16:16:47,474 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-12 16:16:47,474 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 52 transitions. [2020-10-12 16:16:47,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-12 16:16:47,474 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:16:47,475 INFO L422 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:16:47,475 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-12 16:16:47,475 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:16:47,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:16:47,475 INFO L82 PathProgramCache]: Analyzing trace with hash 1700231063, now seen corresponding path program 16 times [2020-10-12 16:16:47,476 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:16:47,476 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [69410489] [2020-10-12 16:16:47,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:16:47,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:47,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:47,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:47,810 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:47,811 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-12 16:16:47,811 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:16:47,811 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 324 [2020-10-12 16:16:47,811 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:47,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-12 16:16:47,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:16:47,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-12 16:16:47,812 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:16:48,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:16:48,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:48,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:48,013 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:48,013 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:16:48,013 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:16:48,013 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:16:48,014 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:48,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:16:48,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:16:48,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:16:48,014 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:16:48,017 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 17 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:16:48,018 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [69410489] [2020-10-12 16:16:48,018 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:16:48,018 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-12 16:16:48,018 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224350733] [2020-10-12 16:16:48,019 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-12 16:16:48,019 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:16:48,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-12 16:16:48,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-10-12 16:16:48,020 INFO L87 Difference]: Start difference. First operand 49 states and 52 transitions. Second operand 19 states. [2020-10-12 16:16:48,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:16:48,102 INFO L93 Difference]: Finished difference Result 63 states and 70 transitions. [2020-10-12 16:16:48,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-12 16:16:48,103 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 46 [2020-10-12 16:16:48,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:16:48,104 INFO L225 Difference]: With dead ends: 63 [2020-10-12 16:16:48,104 INFO L226 Difference]: Without dead ends: 51 [2020-10-12 16:16:48,105 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2020-10-12 16:16:48,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-12 16:16:48,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-10-12 16:16:48,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-12 16:16:48,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 54 transitions. [2020-10-12 16:16:48,109 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 54 transitions. Word has length 46 [2020-10-12 16:16:48,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:16:48,109 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 54 transitions. [2020-10-12 16:16:48,110 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-12 16:16:48,110 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 54 transitions. [2020-10-12 16:16:48,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-12 16:16:48,110 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:16:48,110 INFO L422 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:16:48,111 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-12 16:16:48,111 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:16:48,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:16:48,111 INFO L82 PathProgramCache]: Analyzing trace with hash -200829740, now seen corresponding path program 17 times [2020-10-12 16:16:48,111 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:16:48,112 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [354972627] [2020-10-12 16:16:48,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:16:48,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:48,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:48,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:48,432 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:48,432 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-12 16:16:48,432 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:16:48,433 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 312 [2020-10-12 16:16:48,433 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:48,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-12 16:16:48,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:16:48,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-12 16:16:48,434 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:16:48,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:16:48,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:48,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:48,645 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:48,646 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:16:48,646 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:16:48,646 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:16:48,646 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:48,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:16:48,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:16:48,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:16:48,647 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:16:48,652 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 18 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:16:48,652 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [354972627] [2020-10-12 16:16:48,652 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:16:48,653 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-12 16:16:48,653 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309805951] [2020-10-12 16:16:48,653 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-12 16:16:48,654 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:16:48,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-12 16:16:48,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-10-12 16:16:48,655 INFO L87 Difference]: Start difference. First operand 51 states and 54 transitions. Second operand 20 states. [2020-10-12 16:16:48,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:16:48,743 INFO L93 Difference]: Finished difference Result 65 states and 72 transitions. [2020-10-12 16:16:48,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-12 16:16:48,743 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 48 [2020-10-12 16:16:48,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:16:48,744 INFO L225 Difference]: With dead ends: 65 [2020-10-12 16:16:48,744 INFO L226 Difference]: Without dead ends: 53 [2020-10-12 16:16:48,745 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2020-10-12 16:16:48,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-12 16:16:48,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-10-12 16:16:48,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-12 16:16:48,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 56 transitions. [2020-10-12 16:16:48,756 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 56 transitions. Word has length 48 [2020-10-12 16:16:48,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:16:48,757 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 56 transitions. [2020-10-12 16:16:48,757 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-12 16:16:48,757 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 56 transitions. [2020-10-12 16:16:48,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-12 16:16:48,758 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:16:48,760 INFO L422 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:16:48,760 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-12 16:16:48,760 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:16:48,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:16:48,761 INFO L82 PathProgramCache]: Analyzing trace with hash -1759160623, now seen corresponding path program 18 times [2020-10-12 16:16:48,761 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:16:48,761 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1243213561] [2020-10-12 16:16:48,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:16:48,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:48,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:48,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:49,117 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:49,118 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-12 16:16:49,118 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:16:49,118 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 342 [2020-10-12 16:16:49,118 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:49,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-12 16:16:49,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:16:49,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-12 16:16:49,119 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:16:49,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:16:49,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:49,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:49,362 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:49,362 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:16:49,362 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:16:49,362 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:16:49,362 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:49,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:16:49,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:16:49,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:16:49,363 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:16:49,367 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 19 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:16:49,367 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1243213561] [2020-10-12 16:16:49,368 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:16:49,368 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-12 16:16:49,368 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213151284] [2020-10-12 16:16:49,369 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-12 16:16:49,369 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:16:49,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-12 16:16:49,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-10-12 16:16:49,370 INFO L87 Difference]: Start difference. First operand 53 states and 56 transitions. Second operand 21 states. [2020-10-12 16:16:49,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:16:49,475 INFO L93 Difference]: Finished difference Result 67 states and 74 transitions. [2020-10-12 16:16:49,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-12 16:16:49,475 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 50 [2020-10-12 16:16:49,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:16:49,476 INFO L225 Difference]: With dead ends: 67 [2020-10-12 16:16:49,476 INFO L226 Difference]: Without dead ends: 55 [2020-10-12 16:16:49,477 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2020-10-12 16:16:49,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-12 16:16:49,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2020-10-12 16:16:49,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-12 16:16:49,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 58 transitions. [2020-10-12 16:16:49,483 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 58 transitions. Word has length 50 [2020-10-12 16:16:49,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:16:49,485 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 58 transitions. [2020-10-12 16:16:49,485 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-12 16:16:49,485 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 58 transitions. [2020-10-12 16:16:49,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-12 16:16:49,486 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:16:49,486 INFO L422 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:16:49,486 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-12 16:16:49,486 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:16:49,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:16:49,487 INFO L82 PathProgramCache]: Analyzing trace with hash -371552882, now seen corresponding path program 19 times [2020-10-12 16:16:49,487 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:16:49,488 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1622324542] [2020-10-12 16:16:49,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:16:49,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:49,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:49,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:49,851 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:49,852 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-12 16:16:49,852 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:16:49,852 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 354 [2020-10-12 16:16:49,852 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:49,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-12 16:16:49,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:16:49,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-12 16:16:49,853 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:16:50,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:16:50,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:50,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:50,125 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:50,125 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:16:50,125 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:16:50,125 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:16:50,126 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:50,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:16:50,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:16:50,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:16:50,126 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:16:50,130 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 20 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:16:50,130 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1622324542] [2020-10-12 16:16:50,130 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:16:50,130 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-12 16:16:50,130 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388133124] [2020-10-12 16:16:50,132 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-12 16:16:50,132 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:16:50,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-12 16:16:50,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-10-12 16:16:50,133 INFO L87 Difference]: Start difference. First operand 55 states and 58 transitions. Second operand 22 states. [2020-10-12 16:16:50,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:16:50,237 INFO L93 Difference]: Finished difference Result 69 states and 76 transitions. [2020-10-12 16:16:50,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-12 16:16:50,237 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 52 [2020-10-12 16:16:50,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:16:50,238 INFO L225 Difference]: With dead ends: 69 [2020-10-12 16:16:50,238 INFO L226 Difference]: Without dead ends: 57 [2020-10-12 16:16:50,239 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2020-10-12 16:16:50,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-12 16:16:50,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-10-12 16:16:50,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-12 16:16:50,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 60 transitions. [2020-10-12 16:16:50,249 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 60 transitions. Word has length 52 [2020-10-12 16:16:50,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:16:50,250 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 60 transitions. [2020-10-12 16:16:50,250 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-12 16:16:50,250 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 60 transitions. [2020-10-12 16:16:50,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-12 16:16:50,250 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:16:50,251 INFO L422 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:16:50,251 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-12 16:16:50,251 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:16:50,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:16:50,251 INFO L82 PathProgramCache]: Analyzing trace with hash 1679624459, now seen corresponding path program 20 times [2020-10-12 16:16:50,252 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:16:50,253 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [57590601] [2020-10-12 16:16:50,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:16:50,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:50,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:50,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:50,635 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:50,635 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-12 16:16:50,635 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:16:50,636 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 369 [2020-10-12 16:16:50,636 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:50,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-12 16:16:50,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:16:50,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-12 16:16:50,636 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:16:50,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:16:50,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:50,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:50,942 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:50,943 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:16:50,943 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:16:50,943 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:16:50,943 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:50,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:16:50,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:16:50,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:16:50,944 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:16:50,948 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 21 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:16:50,948 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [57590601] [2020-10-12 16:16:50,948 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:16:50,948 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-12 16:16:50,949 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136386625] [2020-10-12 16:16:50,950 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-12 16:16:50,950 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:16:50,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-12 16:16:50,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-10-12 16:16:50,951 INFO L87 Difference]: Start difference. First operand 57 states and 60 transitions. Second operand 23 states. [2020-10-12 16:16:51,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:16:51,053 INFO L93 Difference]: Finished difference Result 71 states and 78 transitions. [2020-10-12 16:16:51,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-12 16:16:51,055 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 54 [2020-10-12 16:16:51,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:16:51,056 INFO L225 Difference]: With dead ends: 71 [2020-10-12 16:16:51,056 INFO L226 Difference]: Without dead ends: 59 [2020-10-12 16:16:51,057 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2020-10-12 16:16:51,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-12 16:16:51,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2020-10-12 16:16:51,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-12 16:16:51,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 62 transitions. [2020-10-12 16:16:51,062 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 62 transitions. Word has length 54 [2020-10-12 16:16:51,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:16:51,063 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 62 transitions. [2020-10-12 16:16:51,063 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-12 16:16:51,063 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 62 transitions. [2020-10-12 16:16:51,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-12 16:16:51,064 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:16:51,065 INFO L422 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:16:51,065 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-12 16:16:51,065 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:16:51,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:16:51,065 INFO L82 PathProgramCache]: Analyzing trace with hash 1471060296, now seen corresponding path program 21 times [2020-10-12 16:16:51,066 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:16:51,069 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [448679768] [2020-10-12 16:16:51,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:16:51,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:51,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:51,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:51,434 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:51,435 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-12 16:16:51,435 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:16:51,435 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 355 [2020-10-12 16:16:51,435 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:51,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-12 16:16:51,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:16:51,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-12 16:16:51,436 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:16:51,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:16:51,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:51,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:51,715 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:51,715 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:16:51,715 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:16:51,715 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:16:51,715 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:51,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:16:51,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:16:51,716 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:16:51,716 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:16:51,720 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 22 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:16:51,720 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [448679768] [2020-10-12 16:16:51,722 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:16:51,723 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-12 16:16:51,724 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384450262] [2020-10-12 16:16:51,724 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-12 16:16:51,724 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:16:51,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-12 16:16:51,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-10-12 16:16:51,725 INFO L87 Difference]: Start difference. First operand 59 states and 62 transitions. Second operand 24 states. [2020-10-12 16:16:51,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:16:51,811 INFO L93 Difference]: Finished difference Result 73 states and 80 transitions. [2020-10-12 16:16:51,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-12 16:16:51,812 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 56 [2020-10-12 16:16:51,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:16:51,813 INFO L225 Difference]: With dead ends: 73 [2020-10-12 16:16:51,813 INFO L226 Difference]: Without dead ends: 61 [2020-10-12 16:16:51,813 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2020-10-12 16:16:51,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-12 16:16:51,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2020-10-12 16:16:51,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-12 16:16:51,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 64 transitions. [2020-10-12 16:16:51,818 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 64 transitions. Word has length 56 [2020-10-12 16:16:51,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:16:51,820 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 64 transitions. [2020-10-12 16:16:51,821 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-12 16:16:51,821 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 64 transitions. [2020-10-12 16:16:51,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-12 16:16:51,821 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:16:51,821 INFO L422 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:16:51,822 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-12 16:16:51,822 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:16:51,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:16:51,822 INFO L82 PathProgramCache]: Analyzing trace with hash -1390604731, now seen corresponding path program 22 times [2020-10-12 16:16:51,822 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:16:51,822 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [835629309] [2020-10-12 16:16:51,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:16:51,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:51,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:51,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:52,183 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:52,184 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-12 16:16:52,184 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:16:52,184 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 349 [2020-10-12 16:16:52,184 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:52,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-12 16:16:52,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:16:52,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-12 16:16:52,185 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:16:52,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:16:52,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:52,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:52,530 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:52,530 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:16:52,530 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:16:52,530 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:16:52,530 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:52,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:16:52,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:16:52,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:16:52,531 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:16:52,536 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 23 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:16:52,536 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [835629309] [2020-10-12 16:16:52,536 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:16:52,536 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-12 16:16:52,537 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857147067] [2020-10-12 16:16:52,537 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-12 16:16:52,537 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:16:52,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-12 16:16:52,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2020-10-12 16:16:52,538 INFO L87 Difference]: Start difference. First operand 61 states and 64 transitions. Second operand 25 states. [2020-10-12 16:16:52,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:16:52,636 INFO L93 Difference]: Finished difference Result 75 states and 82 transitions. [2020-10-12 16:16:52,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-12 16:16:52,636 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 58 [2020-10-12 16:16:52,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:16:52,637 INFO L225 Difference]: With dead ends: 75 [2020-10-12 16:16:52,637 INFO L226 Difference]: Without dead ends: 63 [2020-10-12 16:16:52,638 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2020-10-12 16:16:52,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-12 16:16:52,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-10-12 16:16:52,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-12 16:16:52,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 66 transitions. [2020-10-12 16:16:52,642 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 66 transitions. Word has length 58 [2020-10-12 16:16:52,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:16:52,643 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 66 transitions. [2020-10-12 16:16:52,643 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-12 16:16:52,643 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 66 transitions. [2020-10-12 16:16:52,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-12 16:16:52,643 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:16:52,644 INFO L422 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:16:52,644 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-12 16:16:52,644 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:16:52,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:16:52,644 INFO L82 PathProgramCache]: Analyzing trace with hash 1623341058, now seen corresponding path program 23 times [2020-10-12 16:16:52,645 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:16:52,645 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [283914440] [2020-10-12 16:16:52,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:16:52,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:52,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:52,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:53,052 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:53,052 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-12 16:16:53,052 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:16:53,052 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 400 [2020-10-12 16:16:53,053 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:53,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-12 16:16:53,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:16:53,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-12 16:16:53,053 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:16:53,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:16:53,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:53,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:53,369 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:53,369 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:16:53,369 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:16:53,369 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:16:53,369 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:53,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:16:53,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:16:53,370 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:16:53,370 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:16:53,384 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 24 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:16:53,384 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [283914440] [2020-10-12 16:16:53,384 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:16:53,385 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-12 16:16:53,385 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936780106] [2020-10-12 16:16:53,385 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-12 16:16:53,385 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:16:53,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-12 16:16:53,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2020-10-12 16:16:53,386 INFO L87 Difference]: Start difference. First operand 63 states and 66 transitions. Second operand 26 states. [2020-10-12 16:16:53,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:16:53,518 INFO L93 Difference]: Finished difference Result 77 states and 84 transitions. [2020-10-12 16:16:53,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-12 16:16:53,518 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 60 [2020-10-12 16:16:53,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:16:53,519 INFO L225 Difference]: With dead ends: 77 [2020-10-12 16:16:53,519 INFO L226 Difference]: Without dead ends: 65 [2020-10-12 16:16:53,520 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2020-10-12 16:16:53,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-12 16:16:53,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2020-10-12 16:16:53,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-12 16:16:53,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 68 transitions. [2020-10-12 16:16:53,523 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 68 transitions. Word has length 60 [2020-10-12 16:16:53,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:16:53,523 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 68 transitions. [2020-10-12 16:16:53,524 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-12 16:16:53,524 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 68 transitions. [2020-10-12 16:16:53,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-12 16:16:53,525 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:16:53,525 INFO L422 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:16:53,525 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-12 16:16:53,525 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:16:53,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:16:53,526 INFO L82 PathProgramCache]: Analyzing trace with hash -1077680513, now seen corresponding path program 24 times [2020-10-12 16:16:53,526 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:16:53,526 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1029571103] [2020-10-12 16:16:53,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:16:53,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:53,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:53,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:53,905 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:53,908 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-12 16:16:53,908 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:16:53,908 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 371 [2020-10-12 16:16:53,909 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:53,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-12 16:16:53,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:16:53,909 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-12 16:16:53,909 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:16:54,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:16:54,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:54,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:54,265 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:54,265 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:16:54,265 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:16:54,266 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:16:54,266 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:54,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:16:54,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:16:54,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:16:54,266 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:16:54,269 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 25 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:16:54,270 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1029571103] [2020-10-12 16:16:54,270 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:16:54,270 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-12 16:16:54,270 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716750760] [2020-10-12 16:16:54,271 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-12 16:16:54,271 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:16:54,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-12 16:16:54,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2020-10-12 16:16:54,272 INFO L87 Difference]: Start difference. First operand 65 states and 68 transitions. Second operand 27 states. [2020-10-12 16:16:54,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:16:54,379 INFO L93 Difference]: Finished difference Result 79 states and 86 transitions. [2020-10-12 16:16:54,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-12 16:16:54,379 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 62 [2020-10-12 16:16:54,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:16:54,380 INFO L225 Difference]: With dead ends: 79 [2020-10-12 16:16:54,380 INFO L226 Difference]: Without dead ends: 67 [2020-10-12 16:16:54,381 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2020-10-12 16:16:54,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-12 16:16:54,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2020-10-12 16:16:54,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-12 16:16:54,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 70 transitions. [2020-10-12 16:16:54,386 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 70 transitions. Word has length 62 [2020-10-12 16:16:54,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:16:54,387 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 70 transitions. [2020-10-12 16:16:54,387 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-12 16:16:54,387 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 70 transitions. [2020-10-12 16:16:54,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-12 16:16:54,388 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:16:54,388 INFO L422 BasicCegarLoop]: trace histogram [26, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:16:54,388 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-12 16:16:54,388 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:16:54,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:16:54,389 INFO L82 PathProgramCache]: Analyzing trace with hash 1695803836, now seen corresponding path program 25 times [2020-10-12 16:16:54,389 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:16:54,389 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [718080186] [2020-10-12 16:16:54,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:16:54,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:54,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:54,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:54,677 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:54,678 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-12 16:16:54,678 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:16:54,678 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 279 [2020-10-12 16:16:54,678 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:54,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-12 16:16:54,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:16:54,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-12 16:16:54,679 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:16:55,131 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:16:55,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:55,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:55,133 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:55,133 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:16:55,133 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:16:55,133 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:16:55,134 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:55,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:16:55,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:16:55,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:16:55,134 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:16:55,139 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 26 proven. 650 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:16:55,139 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [718080186] [2020-10-12 16:16:55,139 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:16:55,140 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-12 16:16:55,140 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836973455] [2020-10-12 16:16:55,140 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-12 16:16:55,140 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:16:55,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-12 16:16:55,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2020-10-12 16:16:55,141 INFO L87 Difference]: Start difference. First operand 67 states and 70 transitions. Second operand 28 states. [2020-10-12 16:16:55,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:16:55,259 INFO L93 Difference]: Finished difference Result 81 states and 88 transitions. [2020-10-12 16:16:55,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-12 16:16:55,260 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 64 [2020-10-12 16:16:55,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:16:55,261 INFO L225 Difference]: With dead ends: 81 [2020-10-12 16:16:55,261 INFO L226 Difference]: Without dead ends: 69 [2020-10-12 16:16:55,261 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2020-10-12 16:16:55,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-12 16:16:55,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2020-10-12 16:16:55,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-12 16:16:55,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 72 transitions. [2020-10-12 16:16:55,270 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 72 transitions. Word has length 64 [2020-10-12 16:16:55,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:16:55,270 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 72 transitions. [2020-10-12 16:16:55,270 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-12 16:16:55,270 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 72 transitions. [2020-10-12 16:16:55,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-12 16:16:55,271 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:16:55,271 INFO L422 BasicCegarLoop]: trace histogram [27, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:16:55,271 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-12 16:16:55,272 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:16:55,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:16:55,272 INFO L82 PathProgramCache]: Analyzing trace with hash -160427591, now seen corresponding path program 26 times [2020-10-12 16:16:55,272 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:16:55,272 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [894144972] [2020-10-12 16:16:55,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:16:55,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:55,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:55,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:55,835 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:55,835 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-12 16:16:55,836 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:16:55,836 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 554 [2020-10-12 16:16:55,836 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:55,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-12 16:16:55,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:16:55,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-12 16:16:55,837 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:16:56,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:16:56,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:56,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:56,209 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:56,209 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:16:56,209 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:16:56,209 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:16:56,210 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:56,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:16:56,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:16:56,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:16:56,210 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:16:56,215 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 27 proven. 702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:16:56,215 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [894144972] [2020-10-12 16:16:56,216 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:16:56,216 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-12 16:16:56,216 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21613273] [2020-10-12 16:16:56,216 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-12 16:16:56,217 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:16:56,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-12 16:16:56,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2020-10-12 16:16:56,217 INFO L87 Difference]: Start difference. First operand 69 states and 72 transitions. Second operand 29 states. [2020-10-12 16:16:56,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:16:56,334 INFO L93 Difference]: Finished difference Result 83 states and 90 transitions. [2020-10-12 16:16:56,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-12 16:16:56,335 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 66 [2020-10-12 16:16:56,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:16:56,335 INFO L225 Difference]: With dead ends: 83 [2020-10-12 16:16:56,335 INFO L226 Difference]: Without dead ends: 71 [2020-10-12 16:16:56,336 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2020-10-12 16:16:56,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-12 16:16:56,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2020-10-12 16:16:56,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-12 16:16:56,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 74 transitions. [2020-10-12 16:16:56,340 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 74 transitions. Word has length 66 [2020-10-12 16:16:56,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:16:56,340 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 74 transitions. [2020-10-12 16:16:56,340 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-12 16:16:56,340 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 74 transitions. [2020-10-12 16:16:56,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-12 16:16:56,341 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:16:56,341 INFO L422 BasicCegarLoop]: trace histogram [28, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:16:56,341 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-12 16:16:56,341 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:16:56,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:16:56,342 INFO L82 PathProgramCache]: Analyzing trace with hash -1587401098, now seen corresponding path program 27 times [2020-10-12 16:16:56,342 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:16:56,342 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1401127233] [2020-10-12 16:16:56,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:16:56,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:56,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:56,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:56,813 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:56,813 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-12 16:16:56,813 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:16:56,813 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 462 [2020-10-12 16:16:56,813 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:56,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-12 16:16:56,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:16:56,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-12 16:16:56,814 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:16:57,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:16:57,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:57,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:57,315 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:57,315 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:16:57,316 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:16:57,316 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:16:57,316 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:57,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:16:57,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:16:57,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:16:57,318 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:16:57,326 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 28 proven. 756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:16:57,326 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1401127233] [2020-10-12 16:16:57,327 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:16:57,327 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-12 16:16:57,327 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294715853] [2020-10-12 16:16:57,327 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-12 16:16:57,328 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:16:57,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-12 16:16:57,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2020-10-12 16:16:57,328 INFO L87 Difference]: Start difference. First operand 71 states and 74 transitions. Second operand 30 states. [2020-10-12 16:16:57,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:16:57,512 INFO L93 Difference]: Finished difference Result 85 states and 92 transitions. [2020-10-12 16:16:57,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-12 16:16:57,513 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 68 [2020-10-12 16:16:57,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:16:57,514 INFO L225 Difference]: With dead ends: 85 [2020-10-12 16:16:57,515 INFO L226 Difference]: Without dead ends: 73 [2020-10-12 16:16:57,515 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2020-10-12 16:16:57,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-12 16:16:57,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2020-10-12 16:16:57,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-12 16:16:57,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 76 transitions. [2020-10-12 16:16:57,520 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 76 transitions. Word has length 68 [2020-10-12 16:16:57,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:16:57,520 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 76 transitions. [2020-10-12 16:16:57,521 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-12 16:16:57,521 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 76 transitions. [2020-10-12 16:16:57,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-12 16:16:57,522 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:16:57,522 INFO L422 BasicCegarLoop]: trace histogram [29, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:16:57,522 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-12 16:16:57,522 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:16:57,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:16:57,523 INFO L82 PathProgramCache]: Analyzing trace with hash 1480593395, now seen corresponding path program 28 times [2020-10-12 16:16:57,523 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:16:57,523 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1187778027] [2020-10-12 16:16:57,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:16:57,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:57,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:57,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:58,050 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:58,050 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-12 16:16:58,050 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:16:58,050 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 514 [2020-10-12 16:16:58,051 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:58,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-12 16:16:58,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:16:58,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-12 16:16:58,051 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:16:58,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:16:58,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:58,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:58,533 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:58,533 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:16:58,534 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:16:58,534 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:16:58,534 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:58,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:16:58,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:16:58,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:16:58,535 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:16:58,540 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 29 proven. 812 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:16:58,540 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1187778027] [2020-10-12 16:16:58,540 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:16:58,540 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-12 16:16:58,541 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723655882] [2020-10-12 16:16:58,541 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-12 16:16:58,541 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:16:58,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-12 16:16:58,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2020-10-12 16:16:58,542 INFO L87 Difference]: Start difference. First operand 73 states and 76 transitions. Second operand 31 states. [2020-10-12 16:16:58,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:16:58,662 INFO L93 Difference]: Finished difference Result 87 states and 94 transitions. [2020-10-12 16:16:58,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-12 16:16:58,662 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 70 [2020-10-12 16:16:58,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:16:58,663 INFO L225 Difference]: With dead ends: 87 [2020-10-12 16:16:58,663 INFO L226 Difference]: Without dead ends: 75 [2020-10-12 16:16:58,664 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2020-10-12 16:16:58,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-12 16:16:58,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2020-10-12 16:16:58,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-12 16:16:58,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 78 transitions. [2020-10-12 16:16:58,668 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 78 transitions. Word has length 70 [2020-10-12 16:16:58,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:16:58,668 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 78 transitions. [2020-10-12 16:16:58,669 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-12 16:16:58,669 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 78 transitions. [2020-10-12 16:16:58,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-12 16:16:58,671 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:16:58,671 INFO L422 BasicCegarLoop]: trace histogram [30, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:16:58,671 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-12 16:16:58,671 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:16:58,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:16:58,672 INFO L82 PathProgramCache]: Analyzing trace with hash -819231184, now seen corresponding path program 29 times [2020-10-12 16:16:58,672 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:16:58,672 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [747833587] [2020-10-12 16:16:58,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:16:58,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:58,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:58,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:59,002 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:59,002 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-12 16:16:59,002 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:16:59,002 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 320 [2020-10-12 16:16:59,002 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:59,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-12 16:16:59,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:16:59,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-12 16:16:59,003 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:16:59,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:16:59,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:59,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:59,494 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:16:59,494 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:16:59,494 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:16:59,495 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:16:59,495 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:16:59,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:16:59,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:16:59,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:16:59,495 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:16:59,499 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 30 proven. 870 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:16:59,499 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [747833587] [2020-10-12 16:16:59,500 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:16:59,500 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-12 16:16:59,500 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44695446] [2020-10-12 16:16:59,501 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-12 16:16:59,501 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:16:59,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-12 16:16:59,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2020-10-12 16:16:59,502 INFO L87 Difference]: Start difference. First operand 75 states and 78 transitions. Second operand 32 states. [2020-10-12 16:16:59,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:16:59,642 INFO L93 Difference]: Finished difference Result 89 states and 96 transitions. [2020-10-12 16:16:59,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-12 16:16:59,643 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 72 [2020-10-12 16:16:59,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:16:59,644 INFO L225 Difference]: With dead ends: 89 [2020-10-12 16:16:59,644 INFO L226 Difference]: Without dead ends: 77 [2020-10-12 16:16:59,645 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2020-10-12 16:16:59,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-12 16:16:59,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2020-10-12 16:16:59,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-12 16:16:59,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 80 transitions. [2020-10-12 16:16:59,649 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 80 transitions. Word has length 72 [2020-10-12 16:16:59,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:16:59,649 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 80 transitions. [2020-10-12 16:16:59,649 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-12 16:16:59,649 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 80 transitions. [2020-10-12 16:16:59,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-12 16:16:59,650 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:16:59,650 INFO L422 BasicCegarLoop]: trace histogram [31, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:16:59,650 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-12 16:16:59,650 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:16:59,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:16:59,651 INFO L82 PathProgramCache]: Analyzing trace with hash 957505837, now seen corresponding path program 30 times [2020-10-12 16:16:59,651 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:16:59,651 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1641561702] [2020-10-12 16:16:59,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:16:59,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:16:59,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:16:59,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:00,185 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:17:00,185 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-12 16:17:00,186 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:17:00,186 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 524 [2020-10-12 16:17:00,186 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:17:00,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-12 16:17:00,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:17:00,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-12 16:17:00,187 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:17:00,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:17:00,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:17:00,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:00,861 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:17:00,861 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:17:00,861 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:17:00,862 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:17:00,862 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:17:00,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:17:00,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:17:00,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:17:00,862 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:17:00,869 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 31 proven. 930 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:17:00,869 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1641561702] [2020-10-12 16:17:00,869 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:17:00,869 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-12 16:17:00,870 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816780250] [2020-10-12 16:17:00,870 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-12 16:17:00,870 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:17:00,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-12 16:17:00,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2020-10-12 16:17:00,871 INFO L87 Difference]: Start difference. First operand 77 states and 80 transitions. Second operand 33 states. [2020-10-12 16:17:01,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:17:01,015 INFO L93 Difference]: Finished difference Result 91 states and 98 transitions. [2020-10-12 16:17:01,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-12 16:17:01,016 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 74 [2020-10-12 16:17:01,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:17:01,016 INFO L225 Difference]: With dead ends: 91 [2020-10-12 16:17:01,017 INFO L226 Difference]: Without dead ends: 79 [2020-10-12 16:17:01,017 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2020-10-12 16:17:01,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-12 16:17:01,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2020-10-12 16:17:01,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-12 16:17:01,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 82 transitions. [2020-10-12 16:17:01,021 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 82 transitions. Word has length 74 [2020-10-12 16:17:01,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:17:01,022 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 82 transitions. [2020-10-12 16:17:01,022 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-12 16:17:01,022 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 82 transitions. [2020-10-12 16:17:01,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-12 16:17:01,023 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:17:01,023 INFO L422 BasicCegarLoop]: trace histogram [32, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:17:01,023 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-12 16:17:01,023 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:17:01,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:17:01,023 INFO L82 PathProgramCache]: Analyzing trace with hash -995200790, now seen corresponding path program 31 times [2020-10-12 16:17:01,024 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:17:01,024 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [652144260] [2020-10-12 16:17:01,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:17:01,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:17:01,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:01,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:01,486 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:17:01,486 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-12 16:17:01,487 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:17:01,487 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 453 [2020-10-12 16:17:01,487 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:17:01,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-12 16:17:01,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:17:01,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-12 16:17:01,487 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:17:02,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:17:02,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:17:02,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:02,072 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:17:02,073 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:17:02,073 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:17:02,073 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:17:02,074 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:17:02,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:17:02,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:17:02,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:17:02,075 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:17:02,087 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 32 proven. 992 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:17:02,087 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [652144260] [2020-10-12 16:17:02,087 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:17:02,088 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-12 16:17:02,088 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871634331] [2020-10-12 16:17:02,088 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-12 16:17:02,089 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:17:02,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-12 16:17:02,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2020-10-12 16:17:02,090 INFO L87 Difference]: Start difference. First operand 79 states and 82 transitions. Second operand 34 states. [2020-10-12 16:17:02,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:17:02,254 INFO L93 Difference]: Finished difference Result 93 states and 100 transitions. [2020-10-12 16:17:02,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-12 16:17:02,255 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 76 [2020-10-12 16:17:02,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:17:02,256 INFO L225 Difference]: With dead ends: 93 [2020-10-12 16:17:02,257 INFO L226 Difference]: Without dead ends: 81 [2020-10-12 16:17:02,258 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2020-10-12 16:17:02,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-12 16:17:02,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2020-10-12 16:17:02,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-12 16:17:02,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 84 transitions. [2020-10-12 16:17:02,266 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 84 transitions. Word has length 76 [2020-10-12 16:17:02,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:17:02,266 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 84 transitions. [2020-10-12 16:17:02,266 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-12 16:17:02,267 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 84 transitions. [2020-10-12 16:17:02,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-12 16:17:02,268 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:17:02,268 INFO L422 BasicCegarLoop]: trace histogram [33, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:17:02,268 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-12 16:17:02,269 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:17:02,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:17:02,269 INFO L82 PathProgramCache]: Analyzing trace with hash -645560985, now seen corresponding path program 32 times [2020-10-12 16:17:02,269 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:17:02,270 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [279695961] [2020-10-12 16:17:02,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:17:02,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:17:02,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:02,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:02,842 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:17:02,842 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-12 16:17:02,843 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:17:02,843 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 561 [2020-10-12 16:17:02,843 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:17:02,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-12 16:17:02,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:17:02,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-10-12 16:17:02,844 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:17:03,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:17:03,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:17:03,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:03,545 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:17:03,546 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:17:03,546 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:17:03,546 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:17:03,547 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:17:03,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:17:03,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:17:03,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:17:03,548 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:17:03,561 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 33 proven. 1056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:17:03,561 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [279695961] [2020-10-12 16:17:03,562 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:17:03,562 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-12 16:17:03,562 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529081907] [2020-10-12 16:17:03,563 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-12 16:17:03,566 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:17:03,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-12 16:17:03,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2020-10-12 16:17:03,568 INFO L87 Difference]: Start difference. First operand 81 states and 84 transitions. Second operand 35 states. [2020-10-12 16:17:03,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:17:03,790 INFO L93 Difference]: Finished difference Result 95 states and 102 transitions. [2020-10-12 16:17:03,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-12 16:17:03,790 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 78 [2020-10-12 16:17:03,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:17:03,791 INFO L225 Difference]: With dead ends: 95 [2020-10-12 16:17:03,791 INFO L226 Difference]: Without dead ends: 83 [2020-10-12 16:17:03,793 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2020-10-12 16:17:03,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-12 16:17:03,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2020-10-12 16:17:03,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-12 16:17:03,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 86 transitions. [2020-10-12 16:17:03,799 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 86 transitions. Word has length 78 [2020-10-12 16:17:03,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:17:03,799 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 86 transitions. [2020-10-12 16:17:03,799 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-12 16:17:03,800 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 86 transitions. [2020-10-12 16:17:03,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-12 16:17:03,800 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:17:03,801 INFO L422 BasicCegarLoop]: trace histogram [34, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:17:03,801 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-12 16:17:03,801 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:17:03,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:17:03,801 INFO L82 PathProgramCache]: Analyzing trace with hash 350842532, now seen corresponding path program 33 times [2020-10-12 16:17:03,802 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:17:03,802 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [967799383] [2020-10-12 16:17:03,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:17:03,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:17:03,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:03,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:04,474 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:17:04,475 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-12 16:17:04,475 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:17:04,475 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 662 [2020-10-12 16:17:04,475 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:17:04,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-12 16:17:04,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:17:04,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-12 16:17:04,476 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:17:05,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:17:05,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:17:05,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:05,092 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:17:05,093 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:17:05,093 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:17:05,093 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:17:05,093 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:17:05,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:17:05,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:17:05,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:17:05,094 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:17:05,101 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 34 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:17:05,101 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [967799383] [2020-10-12 16:17:05,102 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:17:05,102 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-12 16:17:05,102 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131537927] [2020-10-12 16:17:05,102 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-12 16:17:05,102 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:17:05,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-12 16:17:05,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2020-10-12 16:17:05,103 INFO L87 Difference]: Start difference. First operand 83 states and 86 transitions. Second operand 36 states. [2020-10-12 16:17:05,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:17:05,255 INFO L93 Difference]: Finished difference Result 97 states and 104 transitions. [2020-10-12 16:17:05,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-12 16:17:05,255 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 80 [2020-10-12 16:17:05,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:17:05,256 INFO L225 Difference]: With dead ends: 97 [2020-10-12 16:17:05,256 INFO L226 Difference]: Without dead ends: 85 [2020-10-12 16:17:05,257 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2020-10-12 16:17:05,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-12 16:17:05,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2020-10-12 16:17:05,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-12 16:17:05,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 88 transitions. [2020-10-12 16:17:05,260 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 88 transitions. Word has length 80 [2020-10-12 16:17:05,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:17:05,260 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 88 transitions. [2020-10-12 16:17:05,261 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-12 16:17:05,261 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 88 transitions. [2020-10-12 16:17:05,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-12 16:17:05,261 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:17:05,262 INFO L422 BasicCegarLoop]: trace histogram [35, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:17:05,262 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-12 16:17:05,262 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:17:05,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:17:05,262 INFO L82 PathProgramCache]: Analyzing trace with hash 116915361, now seen corresponding path program 34 times [2020-10-12 16:17:05,262 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:17:05,263 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [644071347] [2020-10-12 16:17:05,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:17:05,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:17:05,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:05,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:05,613 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:17:05,619 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-12 16:17:05,619 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:17:05,619 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 341 [2020-10-12 16:17:05,620 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:17:05,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-12 16:17:05,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:17:05,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-12 16:17:05,620 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:17:06,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:17:06,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:17:06,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:06,358 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:17:06,359 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:17:06,359 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:17:06,359 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:17:06,359 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:17:06,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:17:06,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:17:06,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:17:06,360 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:17:06,369 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 35 proven. 1190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:17:06,369 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [644071347] [2020-10-12 16:17:06,369 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:17:06,369 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-12 16:17:06,370 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431904208] [2020-10-12 16:17:06,370 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-12 16:17:06,370 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:17:06,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-12 16:17:06,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2020-10-12 16:17:06,371 INFO L87 Difference]: Start difference. First operand 85 states and 88 transitions. Second operand 37 states. [2020-10-12 16:17:06,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:17:06,539 INFO L93 Difference]: Finished difference Result 99 states and 106 transitions. [2020-10-12 16:17:06,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-12 16:17:06,540 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 82 [2020-10-12 16:17:06,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:17:06,541 INFO L225 Difference]: With dead ends: 99 [2020-10-12 16:17:06,541 INFO L226 Difference]: Without dead ends: 87 [2020-10-12 16:17:06,542 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2020-10-12 16:17:06,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-12 16:17:06,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2020-10-12 16:17:06,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-12 16:17:06,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 90 transitions. [2020-10-12 16:17:06,547 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 90 transitions. Word has length 82 [2020-10-12 16:17:06,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:17:06,547 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 90 transitions. [2020-10-12 16:17:06,547 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-12 16:17:06,547 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 90 transitions. [2020-10-12 16:17:06,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-12 16:17:06,548 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:17:06,548 INFO L422 BasicCegarLoop]: trace histogram [36, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:17:06,548 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-12 16:17:06,549 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:17:06,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:17:06,549 INFO L82 PathProgramCache]: Analyzing trace with hash -1348796578, now seen corresponding path program 35 times [2020-10-12 16:17:06,549 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:17:06,549 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1251015853] [2020-10-12 16:17:06,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:17:06,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:17:06,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:06,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:06,974 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:17:06,974 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-12 16:17:06,974 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:17:06,975 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 415 [2020-10-12 16:17:06,975 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:17:06,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-12 16:17:06,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:17:06,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-10-12 16:17:06,975 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:17:07,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:17:07,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:17:07,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:07,703 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:17:07,703 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:17:07,703 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:17:07,703 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:17:07,703 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:17:07,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:17:07,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:17:07,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:17:07,704 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:17:07,710 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 36 proven. 1260 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:17:07,710 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1251015853] [2020-10-12 16:17:07,711 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:17:07,711 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-12 16:17:07,711 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879787811] [2020-10-12 16:17:07,711 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-12 16:17:07,711 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:17:07,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-12 16:17:07,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2020-10-12 16:17:07,713 INFO L87 Difference]: Start difference. First operand 87 states and 90 transitions. Second operand 38 states. [2020-10-12 16:17:07,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:17:07,873 INFO L93 Difference]: Finished difference Result 101 states and 108 transitions. [2020-10-12 16:17:07,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-12 16:17:07,874 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 84 [2020-10-12 16:17:07,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:17:07,875 INFO L225 Difference]: With dead ends: 101 [2020-10-12 16:17:07,875 INFO L226 Difference]: Without dead ends: 89 [2020-10-12 16:17:07,876 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2020-10-12 16:17:07,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-12 16:17:07,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2020-10-12 16:17:07,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-12 16:17:07,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 92 transitions. [2020-10-12 16:17:07,881 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 92 transitions. Word has length 84 [2020-10-12 16:17:07,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:17:07,881 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 92 transitions. [2020-10-12 16:17:07,881 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-12 16:17:07,881 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 92 transitions. [2020-10-12 16:17:07,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-12 16:17:07,882 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:17:07,882 INFO L422 BasicCegarLoop]: trace histogram [37, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:17:07,882 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-12 16:17:07,882 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:17:07,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:17:07,883 INFO L82 PathProgramCache]: Analyzing trace with hash -1148696869, now seen corresponding path program 36 times [2020-10-12 16:17:07,883 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:17:07,883 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [454961518] [2020-10-12 16:17:07,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:17:07,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:17:07,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:07,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:08,227 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:17:08,227 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-12 16:17:08,227 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:17:08,228 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 335 [2020-10-12 16:17:08,228 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:17:08,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-12 16:17:08,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:17:08,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-12 16:17:08,228 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:17:08,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:17:08,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:17:08,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:08,939 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:17:08,939 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:17:08,939 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:17:08,939 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:17:08,940 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:17:08,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:17:08,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:17:08,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:17:08,940 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:17:08,947 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 37 proven. 1332 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:17:08,948 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [454961518] [2020-10-12 16:17:08,948 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:17:08,948 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-12 16:17:08,948 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652676035] [2020-10-12 16:17:08,948 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-12 16:17:08,949 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:17:08,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-12 16:17:08,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2020-10-12 16:17:08,950 INFO L87 Difference]: Start difference. First operand 89 states and 92 transitions. Second operand 39 states. [2020-10-12 16:17:09,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:17:09,113 INFO L93 Difference]: Finished difference Result 103 states and 110 transitions. [2020-10-12 16:17:09,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-12 16:17:09,114 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 86 [2020-10-12 16:17:09,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:17:09,115 INFO L225 Difference]: With dead ends: 103 [2020-10-12 16:17:09,115 INFO L226 Difference]: Without dead ends: 91 [2020-10-12 16:17:09,116 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2020-10-12 16:17:09,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-12 16:17:09,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2020-10-12 16:17:09,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-12 16:17:09,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 94 transitions. [2020-10-12 16:17:09,121 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 94 transitions. Word has length 86 [2020-10-12 16:17:09,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:17:09,121 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 94 transitions. [2020-10-12 16:17:09,121 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-12 16:17:09,121 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 94 transitions. [2020-10-12 16:17:09,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-12 16:17:09,122 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:17:09,122 INFO L422 BasicCegarLoop]: trace histogram [38, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:17:09,122 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-12 16:17:09,122 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:17:09,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:17:09,123 INFO L82 PathProgramCache]: Analyzing trace with hash -2126404840, now seen corresponding path program 37 times [2020-10-12 16:17:09,123 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:17:09,123 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [799836643] [2020-10-12 16:17:09,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:17:09,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:17:09,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:09,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:09,504 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:17:09,505 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-12 16:17:09,505 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:17:09,505 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 372 [2020-10-12 16:17:09,505 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:17:09,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-12 16:17:09,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:17:09,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-12 16:17:09,506 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:17:10,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:17:10,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:17:10,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:10,266 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:17:10,266 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:17:10,266 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:17:10,266 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:17:10,267 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:17:10,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:17:10,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:17:10,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:17:10,267 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:17:10,274 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 38 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:17:10,274 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [799836643] [2020-10-12 16:17:10,274 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:17:10,274 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-12 16:17:10,274 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501895764] [2020-10-12 16:17:10,275 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-12 16:17:10,275 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:17:10,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-12 16:17:10,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2020-10-12 16:17:10,276 INFO L87 Difference]: Start difference. First operand 91 states and 94 transitions. Second operand 40 states. [2020-10-12 16:17:10,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:17:10,479 INFO L93 Difference]: Finished difference Result 105 states and 112 transitions. [2020-10-12 16:17:10,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-12 16:17:10,479 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 88 [2020-10-12 16:17:10,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:17:10,480 INFO L225 Difference]: With dead ends: 105 [2020-10-12 16:17:10,480 INFO L226 Difference]: Without dead ends: 93 [2020-10-12 16:17:10,481 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2020-10-12 16:17:10,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-12 16:17:10,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2020-10-12 16:17:10,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-12 16:17:10,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 96 transitions. [2020-10-12 16:17:10,486 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 96 transitions. Word has length 88 [2020-10-12 16:17:10,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:17:10,486 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 96 transitions. [2020-10-12 16:17:10,486 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-12 16:17:10,486 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 96 transitions. [2020-10-12 16:17:10,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-12 16:17:10,487 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:17:10,487 INFO L422 BasicCegarLoop]: trace histogram [39, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:17:10,488 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-12 16:17:10,488 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:17:10,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:17:10,488 INFO L82 PathProgramCache]: Analyzing trace with hash -1105927147, now seen corresponding path program 38 times [2020-10-12 16:17:10,488 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:17:10,488 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1141145471] [2020-10-12 16:17:10,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:17:10,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:17:10,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:10,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:10,916 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:17:10,917 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-12 16:17:10,917 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:17:10,917 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 418 [2020-10-12 16:17:10,917 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:17:10,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-12 16:17:10,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:17:10,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 79 [2020-10-12 16:17:10,917 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:17:11,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:17:11,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:17:11,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:11,681 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:17:11,681 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:17:11,681 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:17:11,682 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:17:11,682 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:17:11,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:17:11,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:17:11,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:17:11,682 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:17:11,690 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 39 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:17:11,691 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1141145471] [2020-10-12 16:17:11,691 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:17:11,691 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-12 16:17:11,691 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878756354] [2020-10-12 16:17:11,691 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-12 16:17:11,691 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:17:11,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-12 16:17:11,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2020-10-12 16:17:11,692 INFO L87 Difference]: Start difference. First operand 93 states and 96 transitions. Second operand 41 states. [2020-10-12 16:17:11,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:17:11,888 INFO L93 Difference]: Finished difference Result 107 states and 114 transitions. [2020-10-12 16:17:11,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-12 16:17:11,889 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 90 [2020-10-12 16:17:11,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:17:11,890 INFO L225 Difference]: With dead ends: 107 [2020-10-12 16:17:11,890 INFO L226 Difference]: Without dead ends: 95 [2020-10-12 16:17:11,891 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2020-10-12 16:17:11,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-12 16:17:11,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2020-10-12 16:17:11,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-12 16:17:11,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 98 transitions. [2020-10-12 16:17:11,896 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 98 transitions. Word has length 90 [2020-10-12 16:17:11,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:17:11,897 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 98 transitions. [2020-10-12 16:17:11,897 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-12 16:17:11,897 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 98 transitions. [2020-10-12 16:17:11,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-12 16:17:11,898 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:17:11,898 INFO L422 BasicCegarLoop]: trace histogram [40, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:17:11,898 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-12 16:17:11,899 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:17:11,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:17:11,899 INFO L82 PathProgramCache]: Analyzing trace with hash 320592338, now seen corresponding path program 39 times [2020-10-12 16:17:11,899 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:17:11,899 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1703302199] [2020-10-12 16:17:11,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:17:11,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:17:11,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:11,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:12,299 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:17:12,299 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-12 16:17:12,299 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:17:12,300 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 390 [2020-10-12 16:17:12,300 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:17:12,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-12 16:17:12,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:17:12,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-12 16:17:12,300 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:17:13,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:17:13,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:17:13,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:13,122 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:17:13,122 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:17:13,122 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:17:13,123 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:17:13,123 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:17:13,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:17:13,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:17:13,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:17:13,123 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:17:13,130 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 40 proven. 1560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:17:13,130 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1703302199] [2020-10-12 16:17:13,130 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:17:13,130 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-12 16:17:13,130 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499081204] [2020-10-12 16:17:13,131 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-12 16:17:13,131 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:17:13,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-12 16:17:13,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2020-10-12 16:17:13,132 INFO L87 Difference]: Start difference. First operand 95 states and 98 transitions. Second operand 42 states. [2020-10-12 16:17:13,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:17:13,280 INFO L93 Difference]: Finished difference Result 109 states and 116 transitions. [2020-10-12 16:17:13,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-12 16:17:13,291 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 92 [2020-10-12 16:17:13,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:17:13,292 INFO L225 Difference]: With dead ends: 109 [2020-10-12 16:17:13,292 INFO L226 Difference]: Without dead ends: 97 [2020-10-12 16:17:13,292 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2020-10-12 16:17:13,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-12 16:17:13,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2020-10-12 16:17:13,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-12 16:17:13,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 100 transitions. [2020-10-12 16:17:13,297 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 100 transitions. Word has length 92 [2020-10-12 16:17:13,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:17:13,297 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 100 transitions. [2020-10-12 16:17:13,297 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-12 16:17:13,297 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 100 transitions. [2020-10-12 16:17:13,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-10-12 16:17:13,298 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:17:13,298 INFO L422 BasicCegarLoop]: trace histogram [41, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:17:13,298 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-12 16:17:13,299 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:17:13,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:17:13,299 INFO L82 PathProgramCache]: Analyzing trace with hash 1111249999, now seen corresponding path program 40 times [2020-10-12 16:17:13,299 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:17:13,299 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [197565147] [2020-10-12 16:17:13,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:17:13,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:17:13,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:13,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:13,723 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:17:13,723 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-12 16:17:13,723 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:17:13,723 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 413 [2020-10-12 16:17:13,724 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:17:13,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-12 16:17:13,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:17:13,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 83 [2020-10-12 16:17:13,724 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:17:14,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:17:14,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:17:14,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:14,612 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:17:14,613 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:17:14,613 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:17:14,613 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:17:14,613 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:17:14,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:17:14,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:17:14,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:17:14,613 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:17:14,620 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 41 proven. 1640 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:17:14,620 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [197565147] [2020-10-12 16:17:14,621 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:17:14,621 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-12 16:17:14,621 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388027475] [2020-10-12 16:17:14,621 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-12 16:17:14,621 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:17:14,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-12 16:17:14,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2020-10-12 16:17:14,623 INFO L87 Difference]: Start difference. First operand 97 states and 100 transitions. Second operand 43 states. [2020-10-12 16:17:14,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:17:14,837 INFO L93 Difference]: Finished difference Result 111 states and 118 transitions. [2020-10-12 16:17:14,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-12 16:17:14,837 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 94 [2020-10-12 16:17:14,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:17:14,838 INFO L225 Difference]: With dead ends: 111 [2020-10-12 16:17:14,838 INFO L226 Difference]: Without dead ends: 99 [2020-10-12 16:17:14,840 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2020-10-12 16:17:14,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-12 16:17:14,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2020-10-12 16:17:14,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-12 16:17:14,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 102 transitions. [2020-10-12 16:17:14,845 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 102 transitions. Word has length 94 [2020-10-12 16:17:14,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:17:14,845 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 102 transitions. [2020-10-12 16:17:14,845 INFO L480 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-12 16:17:14,845 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 102 transitions. [2020-10-12 16:17:14,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-10-12 16:17:14,846 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:17:14,846 INFO L422 BasicCegarLoop]: trace histogram [42, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:17:14,846 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-12 16:17:14,847 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:17:14,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:17:14,847 INFO L82 PathProgramCache]: Analyzing trace with hash 724050828, now seen corresponding path program 41 times [2020-10-12 16:17:14,847 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:17:14,847 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1911640506] [2020-10-12 16:17:14,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:17:14,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:17:14,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:15,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:15,287 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:17:15,287 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-12 16:17:15,287 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:17:15,288 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 430 [2020-10-12 16:17:15,288 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:17:15,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 43 [2020-10-12 16:17:15,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:17:15,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 85 [2020-10-12 16:17:15,288 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:17:16,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:17:16,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:17:16,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:16,278 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:17:16,279 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:17:16,279 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:17:16,279 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:17:16,279 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:17:16,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:17:16,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:17:16,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:17:16,279 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:17:16,286 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 42 proven. 1722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:17:16,286 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1911640506] [2020-10-12 16:17:16,287 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:17:16,287 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-12 16:17:16,287 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001459544] [2020-10-12 16:17:16,287 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-12 16:17:16,287 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:17:16,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-12 16:17:16,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2020-10-12 16:17:16,288 INFO L87 Difference]: Start difference. First operand 99 states and 102 transitions. Second operand 44 states. [2020-10-12 16:17:16,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:17:16,462 INFO L93 Difference]: Finished difference Result 113 states and 120 transitions. [2020-10-12 16:17:16,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-12 16:17:16,462 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 96 [2020-10-12 16:17:16,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:17:16,464 INFO L225 Difference]: With dead ends: 113 [2020-10-12 16:17:16,465 INFO L226 Difference]: Without dead ends: 101 [2020-10-12 16:17:16,466 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2020-10-12 16:17:16,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-12 16:17:16,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2020-10-12 16:17:16,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-12 16:17:16,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 104 transitions. [2020-10-12 16:17:16,473 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 104 transitions. Word has length 96 [2020-10-12 16:17:16,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:17:16,475 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 104 transitions. [2020-10-12 16:17:16,475 INFO L480 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-12 16:17:16,475 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 104 transitions. [2020-10-12 16:17:16,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-10-12 16:17:16,477 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:17:16,477 INFO L422 BasicCegarLoop]: trace histogram [43, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:17:16,477 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-12 16:17:16,478 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:17:16,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:17:16,478 INFO L82 PathProgramCache]: Analyzing trace with hash -2007165047, now seen corresponding path program 42 times [2020-10-12 16:17:16,478 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:17:16,478 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1184258066] [2020-10-12 16:17:16,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:17:16,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:17:16,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:16,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:16,937 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:17:16,937 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-12 16:17:16,937 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:17:16,937 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 447 [2020-10-12 16:17:16,937 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:17:16,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 44 [2020-10-12 16:17:16,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:17:16,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 87 [2020-10-12 16:17:16,938 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:17:17,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:17:17,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:17:17,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:17,942 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:17:17,942 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:17:17,942 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:17:17,942 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:17:17,942 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:17:17,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:17:17,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:17:17,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:17:17,943 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:17:17,950 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 43 proven. 1806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:17:17,950 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1184258066] [2020-10-12 16:17:17,950 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:17:17,951 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-10-12 16:17:17,951 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492982343] [2020-10-12 16:17:17,951 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-12 16:17:17,951 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:17:17,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-12 16:17:17,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2020-10-12 16:17:17,952 INFO L87 Difference]: Start difference. First operand 101 states and 104 transitions. Second operand 45 states. [2020-10-12 16:17:18,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:17:18,172 INFO L93 Difference]: Finished difference Result 115 states and 122 transitions. [2020-10-12 16:17:18,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-12 16:17:18,174 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 98 [2020-10-12 16:17:18,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:17:18,175 INFO L225 Difference]: With dead ends: 115 [2020-10-12 16:17:18,175 INFO L226 Difference]: Without dead ends: 103 [2020-10-12 16:17:18,176 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2020-10-12 16:17:18,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-12 16:17:18,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2020-10-12 16:17:18,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-12 16:17:18,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 106 transitions. [2020-10-12 16:17:18,180 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 106 transitions. Word has length 98 [2020-10-12 16:17:18,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:17:18,181 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 106 transitions. [2020-10-12 16:17:18,181 INFO L480 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-12 16:17:18,181 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 106 transitions. [2020-10-12 16:17:18,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-10-12 16:17:18,182 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:17:18,182 INFO L422 BasicCegarLoop]: trace histogram [44, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:17:18,182 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-12 16:17:18,182 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:17:18,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:17:18,183 INFO L82 PathProgramCache]: Analyzing trace with hash 1814364230, now seen corresponding path program 43 times [2020-10-12 16:17:18,183 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:17:18,183 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1987401174] [2020-10-12 16:17:18,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:17:18,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:17:18,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:18,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:18,713 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:17:18,713 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-12 16:17:18,713 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:17:18,713 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 519 [2020-10-12 16:17:18,713 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:17:18,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 45 [2020-10-12 16:17:18,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:17:18,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 89 [2020-10-12 16:17:18,714 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:17:19,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:17:19,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:17:19,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:19,697 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:17:19,697 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:17:19,697 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:17:19,698 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:17:19,698 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:17:19,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:17:19,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:17:19,698 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:17:19,698 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:17:19,720 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 44 proven. 1892 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:17:19,720 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1987401174] [2020-10-12 16:17:19,720 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:17:19,720 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-10-12 16:17:19,721 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165194758] [2020-10-12 16:17:19,721 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-10-12 16:17:19,721 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:17:19,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-10-12 16:17:19,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2020-10-12 16:17:19,722 INFO L87 Difference]: Start difference. First operand 103 states and 106 transitions. Second operand 46 states. [2020-10-12 16:17:19,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:17:19,947 INFO L93 Difference]: Finished difference Result 117 states and 124 transitions. [2020-10-12 16:17:19,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-12 16:17:19,947 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 100 [2020-10-12 16:17:19,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:17:19,948 INFO L225 Difference]: With dead ends: 117 [2020-10-12 16:17:19,948 INFO L226 Difference]: Without dead ends: 105 [2020-10-12 16:17:19,948 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2020-10-12 16:17:19,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-12 16:17:19,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2020-10-12 16:17:19,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-12 16:17:19,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 108 transitions. [2020-10-12 16:17:19,953 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 108 transitions. Word has length 100 [2020-10-12 16:17:19,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:17:19,953 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 108 transitions. [2020-10-12 16:17:19,953 INFO L480 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-10-12 16:17:19,953 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 108 transitions. [2020-10-12 16:17:19,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-10-12 16:17:19,954 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:17:19,954 INFO L422 BasicCegarLoop]: trace histogram [45, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:17:19,954 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-12 16:17:19,954 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:17:19,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:17:19,955 INFO L82 PathProgramCache]: Analyzing trace with hash 2106961347, now seen corresponding path program 44 times [2020-10-12 16:17:19,955 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:17:19,955 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1364983494] [2020-10-12 16:17:19,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:17:19,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:17:19,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:19,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:20,482 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:17:20,482 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-12 16:17:20,482 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:17:20,482 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 516 [2020-10-12 16:17:20,482 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:17:20,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 46 [2020-10-12 16:17:20,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:17:20,483 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 91 [2020-10-12 16:17:20,483 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:17:21,548 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:17:21,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:17:21,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:21,550 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:17:21,551 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:17:21,551 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:17:21,551 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:17:21,551 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:17:21,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:17:21,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:17:21,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:17:21,551 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:17:21,559 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 45 proven. 1980 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:17:21,560 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1364983494] [2020-10-12 16:17:21,560 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:17:21,560 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-10-12 16:17:21,560 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642243615] [2020-10-12 16:17:21,560 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-10-12 16:17:21,560 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:17:21,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-10-12 16:17:21,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2020-10-12 16:17:21,561 INFO L87 Difference]: Start difference. First operand 105 states and 108 transitions. Second operand 47 states. [2020-10-12 16:17:21,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:17:21,819 INFO L93 Difference]: Finished difference Result 119 states and 126 transitions. [2020-10-12 16:17:21,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-12 16:17:21,820 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 102 [2020-10-12 16:17:21,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:17:21,821 INFO L225 Difference]: With dead ends: 119 [2020-10-12 16:17:21,821 INFO L226 Difference]: Without dead ends: 107 [2020-10-12 16:17:21,822 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2020-10-12 16:17:21,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-12 16:17:21,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2020-10-12 16:17:21,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-10-12 16:17:21,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 110 transitions. [2020-10-12 16:17:21,831 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 110 transitions. Word has length 102 [2020-10-12 16:17:21,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:17:21,831 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 110 transitions. [2020-10-12 16:17:21,831 INFO L480 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-10-12 16:17:21,831 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 110 transitions. [2020-10-12 16:17:21,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-10-12 16:17:21,837 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:17:21,837 INFO L422 BasicCegarLoop]: trace histogram [46, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:17:21,837 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-12 16:17:21,838 INFO L427 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:17:21,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:17:21,838 INFO L82 PathProgramCache]: Analyzing trace with hash -175050752, now seen corresponding path program 45 times [2020-10-12 16:17:21,838 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:17:21,838 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1181303881] [2020-10-12 16:17:21,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:17:21,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:17:21,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:21,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:22,383 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:17:22,383 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-12 16:17:22,383 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:17:22,383 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 533 [2020-10-12 16:17:22,384 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:17:22,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 47 [2020-10-12 16:17:22,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:17:22,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 93 [2020-10-12 16:17:22,384 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:17:23,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:17:23,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:17:23,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:23,496 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:17:23,496 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:17:23,496 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:17:23,497 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:17:23,497 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:17:23,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:17:23,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:17:23,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:17:23,497 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:17:23,506 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 46 proven. 2070 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:17:23,506 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1181303881] [2020-10-12 16:17:23,506 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:17:23,506 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-10-12 16:17:23,506 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013510004] [2020-10-12 16:17:23,506 INFO L459 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-10-12 16:17:23,506 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:17:23,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-10-12 16:17:23,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2020-10-12 16:17:23,507 INFO L87 Difference]: Start difference. First operand 107 states and 110 transitions. Second operand 48 states. [2020-10-12 16:17:23,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:17:23,752 INFO L93 Difference]: Finished difference Result 121 states and 128 transitions. [2020-10-12 16:17:23,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-12 16:17:23,753 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 104 [2020-10-12 16:17:23,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:17:23,754 INFO L225 Difference]: With dead ends: 121 [2020-10-12 16:17:23,754 INFO L226 Difference]: Without dead ends: 109 [2020-10-12 16:17:23,755 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2020-10-12 16:17:23,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-12 16:17:23,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2020-10-12 16:17:23,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-10-12 16:17:23,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 112 transitions. [2020-10-12 16:17:23,762 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 112 transitions. Word has length 104 [2020-10-12 16:17:23,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:17:23,763 INFO L479 AbstractCegarLoop]: Abstraction has 109 states and 112 transitions. [2020-10-12 16:17:23,763 INFO L480 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-10-12 16:17:23,763 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 112 transitions. [2020-10-12 16:17:23,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-10-12 16:17:23,764 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:17:23,764 INFO L422 BasicCegarLoop]: trace histogram [47, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:17:23,765 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-12 16:17:23,765 INFO L427 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:17:23,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:17:23,765 INFO L82 PathProgramCache]: Analyzing trace with hash 1539610365, now seen corresponding path program 46 times [2020-10-12 16:17:23,765 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:17:23,766 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [659743289] [2020-10-12 16:17:23,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:17:23,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:17:23,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:23,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:24,941 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:17:24,942 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-12 16:17:24,942 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:17:24,942 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1160 [2020-10-12 16:17:24,942 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:17:24,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 48 [2020-10-12 16:17:24,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:17:24,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 95 [2020-10-12 16:17:24,943 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:17:26,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:17:26,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:17:26,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:26,202 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:17:26,202 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:17:26,202 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:17:26,202 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:17:26,203 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:17:26,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:17:26,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:17:26,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:17:26,203 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:17:26,212 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 47 proven. 2162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:17:26,212 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [659743289] [2020-10-12 16:17:26,212 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:17:26,212 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-10-12 16:17:26,212 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561984537] [2020-10-12 16:17:26,212 INFO L459 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-10-12 16:17:26,213 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:17:26,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-10-12 16:17:26,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2020-10-12 16:17:26,213 INFO L87 Difference]: Start difference. First operand 109 states and 112 transitions. Second operand 49 states. [2020-10-12 16:17:26,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:17:26,467 INFO L93 Difference]: Finished difference Result 123 states and 130 transitions. [2020-10-12 16:17:26,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-12 16:17:26,468 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 106 [2020-10-12 16:17:26,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:17:26,469 INFO L225 Difference]: With dead ends: 123 [2020-10-12 16:17:26,469 INFO L226 Difference]: Without dead ends: 111 [2020-10-12 16:17:26,469 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2020-10-12 16:17:26,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-12 16:17:26,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2020-10-12 16:17:26,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-12 16:17:26,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 114 transitions. [2020-10-12 16:17:26,474 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 114 transitions. Word has length 106 [2020-10-12 16:17:26,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:17:26,474 INFO L479 AbstractCegarLoop]: Abstraction has 111 states and 114 transitions. [2020-10-12 16:17:26,474 INFO L480 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-10-12 16:17:26,474 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 114 transitions. [2020-10-12 16:17:26,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-10-12 16:17:26,475 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:17:26,475 INFO L422 BasicCegarLoop]: trace histogram [48, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:17:26,475 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-12 16:17:26,476 INFO L427 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:17:26,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:17:26,476 INFO L82 PathProgramCache]: Analyzing trace with hash 61502138, now seen corresponding path program 47 times [2020-10-12 16:17:26,476 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:17:26,476 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1404843841] [2020-10-12 16:17:26,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:17:26,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:17:26,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:26,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:27,061 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:17:27,061 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 116 [2020-10-12 16:17:27,062 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:17:27,062 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 574 [2020-10-12 16:17:27,062 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:17:27,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 49 [2020-10-12 16:17:27,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:17:27,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 97 [2020-10-12 16:17:27,062 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:17:28,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:17:28,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:17:28,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:28,344 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:17:28,344 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:17:28,344 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:17:28,344 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:17:28,344 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:17:28,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:17:28,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:17:28,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:17:28,345 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:17:28,354 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 48 proven. 2256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:17:28,354 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1404843841] [2020-10-12 16:17:28,354 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:17:28,354 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2020-10-12 16:17:28,355 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829918645] [2020-10-12 16:17:28,355 INFO L459 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-10-12 16:17:28,355 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:17:28,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-10-12 16:17:28,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2020-10-12 16:17:28,356 INFO L87 Difference]: Start difference. First operand 111 states and 114 transitions. Second operand 50 states. [2020-10-12 16:17:28,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:17:28,532 INFO L93 Difference]: Finished difference Result 125 states and 132 transitions. [2020-10-12 16:17:28,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-10-12 16:17:28,532 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 108 [2020-10-12 16:17:28,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:17:28,534 INFO L225 Difference]: With dead ends: 125 [2020-10-12 16:17:28,534 INFO L226 Difference]: Without dead ends: 113 [2020-10-12 16:17:28,535 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2020-10-12 16:17:28,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-12 16:17:28,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2020-10-12 16:17:28,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-10-12 16:17:28,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 116 transitions. [2020-10-12 16:17:28,540 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 116 transitions. Word has length 108 [2020-10-12 16:17:28,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:17:28,540 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 116 transitions. [2020-10-12 16:17:28,540 INFO L480 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-10-12 16:17:28,540 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 116 transitions. [2020-10-12 16:17:28,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-10-12 16:17:28,541 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:17:28,541 INFO L422 BasicCegarLoop]: trace histogram [49, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:17:28,541 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-12 16:17:28,541 INFO L427 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:17:28,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:17:28,542 INFO L82 PathProgramCache]: Analyzing trace with hash 1233670967, now seen corresponding path program 48 times [2020-10-12 16:17:28,542 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:17:28,542 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1582047467] [2020-10-12 16:17:28,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:17:28,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:17:28,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:28,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:29,151 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:17:29,151 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 118 [2020-10-12 16:17:29,151 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:17:29,152 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 598 [2020-10-12 16:17:29,152 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:17:29,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 50 [2020-10-12 16:17:29,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:17:29,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 99 [2020-10-12 16:17:29,152 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:17:30,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:17:30,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:17:30,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:30,525 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:17:30,526 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:17:30,526 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:17:30,526 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:17:30,526 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:17:30,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:17:30,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:17:30,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:17:30,527 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:17:30,544 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 49 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:17:30,545 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1582047467] [2020-10-12 16:17:30,545 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:17:30,545 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2020-10-12 16:17:30,545 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231649936] [2020-10-12 16:17:30,545 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-10-12 16:17:30,546 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:17:30,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-10-12 16:17:30,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2020-10-12 16:17:30,547 INFO L87 Difference]: Start difference. First operand 113 states and 116 transitions. Second operand 51 states. [2020-10-12 16:17:30,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:17:30,806 INFO L93 Difference]: Finished difference Result 127 states and 134 transitions. [2020-10-12 16:17:30,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-12 16:17:30,807 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 110 [2020-10-12 16:17:30,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:17:30,808 INFO L225 Difference]: With dead ends: 127 [2020-10-12 16:17:30,808 INFO L226 Difference]: Without dead ends: 115 [2020-10-12 16:17:30,809 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2020-10-12 16:17:30,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-12 16:17:30,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2020-10-12 16:17:30,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-10-12 16:17:30,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 118 transitions. [2020-10-12 16:17:30,814 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 118 transitions. Word has length 110 [2020-10-12 16:17:30,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:17:30,814 INFO L479 AbstractCegarLoop]: Abstraction has 115 states and 118 transitions. [2020-10-12 16:17:30,815 INFO L480 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-10-12 16:17:30,815 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 118 transitions. [2020-10-12 16:17:30,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-10-12 16:17:30,815 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:17:30,816 INFO L422 BasicCegarLoop]: trace histogram [50, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:17:30,816 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-12 16:17:30,816 INFO L427 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:17:30,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:17:30,816 INFO L82 PathProgramCache]: Analyzing trace with hash -1888483212, now seen corresponding path program 49 times [2020-10-12 16:17:30,817 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:17:30,817 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1365155948] [2020-10-12 16:17:30,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:17:30,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:17:30,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:30,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:32,103 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:17:32,103 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 120 [2020-10-12 16:17:32,103 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:17:32,104 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1270 [2020-10-12 16:17:32,104 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:17:32,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 51 [2020-10-12 16:17:32,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:17:32,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 101 [2020-10-12 16:17:32,105 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:17:33,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:17:33,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:17:33,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:33,798 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:17:33,798 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:17:33,798 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:17:33,798 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:17:33,798 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:17:33,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:17:33,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:17:33,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:17:33,799 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:17:33,809 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 50 proven. 2450 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:17:33,809 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1365155948] [2020-10-12 16:17:33,809 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:17:33,809 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2020-10-12 16:17:33,809 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761495545] [2020-10-12 16:17:33,810 INFO L459 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-10-12 16:17:33,810 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:17:33,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-10-12 16:17:33,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2020-10-12 16:17:33,811 INFO L87 Difference]: Start difference. First operand 115 states and 118 transitions. Second operand 52 states. [2020-10-12 16:17:34,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:17:34,087 INFO L93 Difference]: Finished difference Result 129 states and 136 transitions. [2020-10-12 16:17:34,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-10-12 16:17:34,088 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 112 [2020-10-12 16:17:34,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:17:34,090 INFO L225 Difference]: With dead ends: 129 [2020-10-12 16:17:34,090 INFO L226 Difference]: Without dead ends: 117 [2020-10-12 16:17:34,091 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2020-10-12 16:17:34,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-12 16:17:34,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2020-10-12 16:17:34,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-10-12 16:17:34,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 120 transitions. [2020-10-12 16:17:34,096 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 120 transitions. Word has length 112 [2020-10-12 16:17:34,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:17:34,096 INFO L479 AbstractCegarLoop]: Abstraction has 117 states and 120 transitions. [2020-10-12 16:17:34,096 INFO L480 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-10-12 16:17:34,096 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 120 transitions. [2020-10-12 16:17:34,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2020-10-12 16:17:34,097 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:17:34,097 INFO L422 BasicCegarLoop]: trace histogram [51, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:17:34,097 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-12 16:17:34,098 INFO L427 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:17:34,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:17:34,098 INFO L82 PathProgramCache]: Analyzing trace with hash -96509327, now seen corresponding path program 50 times [2020-10-12 16:17:34,098 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:17:34,098 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [932264577] [2020-10-12 16:17:34,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:17:34,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:17:34,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:34,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:34,830 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:17:34,830 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 122 [2020-10-12 16:17:34,830 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:17:34,830 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 720 [2020-10-12 16:17:34,830 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:17:34,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 52 [2020-10-12 16:17:34,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:17:34,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 103 [2020-10-12 16:17:34,831 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:17:36,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:17:36,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:17:36,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:36,289 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:17:36,289 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:17:36,289 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:17:36,290 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:17:36,290 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:17:36,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:17:36,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:17:36,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:17:36,290 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:17:36,303 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 51 proven. 2550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:17:36,303 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [932264577] [2020-10-12 16:17:36,304 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:17:36,304 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2020-10-12 16:17:36,304 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813901747] [2020-10-12 16:17:36,304 INFO L459 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-10-12 16:17:36,304 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:17:36,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-10-12 16:17:36,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2020-10-12 16:17:36,305 INFO L87 Difference]: Start difference. First operand 117 states and 120 transitions. Second operand 53 states. [2020-10-12 16:17:36,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:17:36,564 INFO L93 Difference]: Finished difference Result 131 states and 138 transitions. [2020-10-12 16:17:36,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-10-12 16:17:36,564 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 114 [2020-10-12 16:17:36,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:17:36,565 INFO L225 Difference]: With dead ends: 131 [2020-10-12 16:17:36,565 INFO L226 Difference]: Without dead ends: 119 [2020-10-12 16:17:36,566 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2020-10-12 16:17:36,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-12 16:17:36,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2020-10-12 16:17:36,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-10-12 16:17:36,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 122 transitions. [2020-10-12 16:17:36,570 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 122 transitions. Word has length 114 [2020-10-12 16:17:36,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:17:36,571 INFO L479 AbstractCegarLoop]: Abstraction has 119 states and 122 transitions. [2020-10-12 16:17:36,571 INFO L480 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-10-12 16:17:36,571 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 122 transitions. [2020-10-12 16:17:36,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-10-12 16:17:36,572 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:17:36,572 INFO L422 BasicCegarLoop]: trace histogram [52, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:17:36,572 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-12 16:17:36,572 INFO L427 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:17:36,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:17:36,573 INFO L82 PathProgramCache]: Analyzing trace with hash -291491538, now seen corresponding path program 51 times [2020-10-12 16:17:36,573 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:17:36,573 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1087738864] [2020-10-12 16:17:36,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:17:36,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:17:36,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:36,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:37,368 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:17:37,368 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 124 [2020-10-12 16:17:37,368 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:17:37,368 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 782 [2020-10-12 16:17:37,369 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:17:37,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 53 [2020-10-12 16:17:37,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:17:37,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 105 [2020-10-12 16:17:37,378 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 9 [2020-10-12 16:17:38,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:17:38,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:17:38,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:38,892 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:17:38,893 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:17:38,893 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:17:38,893 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:17:38,893 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:17:38,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:17:38,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:17:38,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:17:38,894 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:17:38,905 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 52 proven. 2652 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:17:38,906 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1087738864] [2020-10-12 16:17:38,906 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:17:38,906 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2020-10-12 16:17:38,906 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550057856] [2020-10-12 16:17:38,906 INFO L459 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-10-12 16:17:38,907 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:17:38,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-10-12 16:17:38,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2020-10-12 16:17:38,908 INFO L87 Difference]: Start difference. First operand 119 states and 122 transitions. Second operand 54 states. [2020-10-12 16:17:39,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:17:39,192 INFO L93 Difference]: Finished difference Result 133 states and 140 transitions. [2020-10-12 16:17:39,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-10-12 16:17:39,193 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 116 [2020-10-12 16:17:39,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:17:39,194 INFO L225 Difference]: With dead ends: 133 [2020-10-12 16:17:39,194 INFO L226 Difference]: Without dead ends: 121 [2020-10-12 16:17:39,195 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2020-10-12 16:17:39,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-12 16:17:39,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2020-10-12 16:17:39,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-12 16:17:39,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 124 transitions. [2020-10-12 16:17:39,199 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 124 transitions. Word has length 116 [2020-10-12 16:17:39,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:17:39,200 INFO L479 AbstractCegarLoop]: Abstraction has 121 states and 124 transitions. [2020-10-12 16:17:39,200 INFO L480 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-10-12 16:17:39,200 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 124 transitions. [2020-10-12 16:17:39,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-10-12 16:17:39,200 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:17:39,201 INFO L422 BasicCegarLoop]: trace histogram [53, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:17:39,201 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-12 16:17:39,201 INFO L427 AbstractCegarLoop]: === Iteration 54 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:17:39,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:17:39,201 INFO L82 PathProgramCache]: Analyzing trace with hash 1309164715, now seen corresponding path program 52 times [2020-10-12 16:17:39,202 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:17:39,202 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [627144030] [2020-10-12 16:17:39,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:17:39,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:17:39,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:39,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:40,051 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:17:40,051 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 126 [2020-10-12 16:17:40,052 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:17:40,052 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 836 [2020-10-12 16:17:40,052 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:17:40,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 54 [2020-10-12 16:17:40,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:17:40,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 107 [2020-10-12 16:17:40,052 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:17:41,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:17:41,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:17:41,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:41,627 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:17:41,627 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:17:41,627 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:17:41,627 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:17:41,627 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:17:41,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:17:41,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:17:41,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:17:41,628 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:17:41,638 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 53 proven. 2756 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:17:41,638 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [627144030] [2020-10-12 16:17:41,639 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:17:41,639 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2020-10-12 16:17:41,639 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483392568] [2020-10-12 16:17:41,639 INFO L459 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-10-12 16:17:41,639 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:17:41,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-10-12 16:17:41,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2020-10-12 16:17:41,640 INFO L87 Difference]: Start difference. First operand 121 states and 124 transitions. Second operand 55 states. [2020-10-12 16:17:41,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:17:41,822 INFO L93 Difference]: Finished difference Result 135 states and 142 transitions. [2020-10-12 16:17:41,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-10-12 16:17:41,823 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 118 [2020-10-12 16:17:41,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:17:41,824 INFO L225 Difference]: With dead ends: 135 [2020-10-12 16:17:41,824 INFO L226 Difference]: Without dead ends: 123 [2020-10-12 16:17:41,825 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2020-10-12 16:17:41,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-12 16:17:41,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2020-10-12 16:17:41,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-10-12 16:17:41,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 126 transitions. [2020-10-12 16:17:41,830 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 126 transitions. Word has length 118 [2020-10-12 16:17:41,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:17:41,830 INFO L479 AbstractCegarLoop]: Abstraction has 123 states and 126 transitions. [2020-10-12 16:17:41,830 INFO L480 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-10-12 16:17:41,831 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 126 transitions. [2020-10-12 16:17:41,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-10-12 16:17:41,831 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:17:41,831 INFO L422 BasicCegarLoop]: trace histogram [54, 53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:17:41,832 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-10-12 16:17:41,832 INFO L427 AbstractCegarLoop]: === Iteration 55 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:17:41,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:17:41,832 INFO L82 PathProgramCache]: Analyzing trace with hash 1941531880, now seen corresponding path program 53 times [2020-10-12 16:17:41,832 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:17:41,832 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1059881952] [2020-10-12 16:17:41,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:17:41,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:17:41,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:41,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:42,615 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:17:42,615 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 128 [2020-10-12 16:17:42,615 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:17:42,615 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 770 [2020-10-12 16:17:42,615 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:17:42,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 55 [2020-10-12 16:17:42,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:17:42,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 109 [2020-10-12 16:17:42,616 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:17:44,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:17:44,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:17:44,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:44,253 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:17:44,253 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:17:44,253 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:17:44,253 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:17:44,253 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:17:44,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:17:44,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:17:44,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:17:44,254 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:17:44,265 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 54 proven. 2862 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:17:44,265 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1059881952] [2020-10-12 16:17:44,265 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:17:44,265 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2020-10-12 16:17:44,265 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905391279] [2020-10-12 16:17:44,266 INFO L459 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-10-12 16:17:44,266 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:17:44,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-10-12 16:17:44,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2020-10-12 16:17:44,267 INFO L87 Difference]: Start difference. First operand 123 states and 126 transitions. Second operand 56 states. [2020-10-12 16:17:44,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:17:44,567 INFO L93 Difference]: Finished difference Result 137 states and 144 transitions. [2020-10-12 16:17:44,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-10-12 16:17:44,568 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 120 [2020-10-12 16:17:44,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:17:44,569 INFO L225 Difference]: With dead ends: 137 [2020-10-12 16:17:44,570 INFO L226 Difference]: Without dead ends: 125 [2020-10-12 16:17:44,570 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2020-10-12 16:17:44,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-12 16:17:44,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2020-10-12 16:17:44,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-10-12 16:17:44,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 128 transitions. [2020-10-12 16:17:44,575 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 128 transitions. Word has length 120 [2020-10-12 16:17:44,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:17:44,575 INFO L479 AbstractCegarLoop]: Abstraction has 125 states and 128 transitions. [2020-10-12 16:17:44,575 INFO L480 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-10-12 16:17:44,575 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 128 transitions. [2020-10-12 16:17:44,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-10-12 16:17:44,576 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:17:44,576 INFO L422 BasicCegarLoop]: trace histogram [55, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:17:44,576 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-10-12 16:17:44,577 INFO L427 AbstractCegarLoop]: === Iteration 56 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:17:44,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:17:44,577 INFO L82 PathProgramCache]: Analyzing trace with hash -238978587, now seen corresponding path program 54 times [2020-10-12 16:17:44,577 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:17:44,577 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [872372949] [2020-10-12 16:17:44,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:17:44,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:17:44,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:44,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:45,603 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:17:45,604 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-12 16:17:45,604 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:17:45,604 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1014 [2020-10-12 16:17:45,604 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:17:45,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 56 [2020-10-12 16:17:45,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:17:45,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 111 [2020-10-12 16:17:45,604 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:17:47,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:17:47,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:17:47,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:47,312 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:17:47,312 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:17:47,312 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:17:47,312 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:17:47,312 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:17:47,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:17:47,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:17:47,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:17:47,313 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:17:47,324 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 55 proven. 2970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:17:47,325 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [872372949] [2020-10-12 16:17:47,325 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:17:47,325 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2020-10-12 16:17:47,325 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971726541] [2020-10-12 16:17:47,326 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-10-12 16:17:47,326 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:17:47,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-10-12 16:17:47,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2020-10-12 16:17:47,327 INFO L87 Difference]: Start difference. First operand 125 states and 128 transitions. Second operand 57 states. [2020-10-12 16:17:47,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:17:47,638 INFO L93 Difference]: Finished difference Result 139 states and 146 transitions. [2020-10-12 16:17:47,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-10-12 16:17:47,639 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 122 [2020-10-12 16:17:47,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:17:47,639 INFO L225 Difference]: With dead ends: 139 [2020-10-12 16:17:47,640 INFO L226 Difference]: Without dead ends: 127 [2020-10-12 16:17:47,640 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2020-10-12 16:17:47,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-10-12 16:17:47,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2020-10-12 16:17:47,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-10-12 16:17:47,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 130 transitions. [2020-10-12 16:17:47,644 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 130 transitions. Word has length 122 [2020-10-12 16:17:47,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:17:47,644 INFO L479 AbstractCegarLoop]: Abstraction has 127 states and 130 transitions. [2020-10-12 16:17:47,644 INFO L480 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-10-12 16:17:47,644 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 130 transitions. [2020-10-12 16:17:47,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-10-12 16:17:47,645 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:17:47,645 INFO L422 BasicCegarLoop]: trace histogram [56, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:17:47,645 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-10-12 16:17:47,646 INFO L427 AbstractCegarLoop]: === Iteration 57 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:17:47,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:17:47,646 INFO L82 PathProgramCache]: Analyzing trace with hash 234503074, now seen corresponding path program 55 times [2020-10-12 16:17:47,646 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:17:47,646 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2062913427] [2020-10-12 16:17:47,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:17:47,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:17:47,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:47,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:48,511 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:17:48,511 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 132 [2020-10-12 16:17:48,511 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:17:48,512 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 853 [2020-10-12 16:17:48,512 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:17:48,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 57 [2020-10-12 16:17:48,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:17:48,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 113 [2020-10-12 16:17:48,512 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:17:50,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:17:50,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:17:50,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:50,263 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:17:50,264 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:17:50,264 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:17:50,264 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:17:50,264 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:17:50,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:17:50,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:17:50,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:17:50,265 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:17:50,276 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 56 proven. 3080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:17:50,276 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2062913427] [2020-10-12 16:17:50,276 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:17:50,277 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58] total 58 [2020-10-12 16:17:50,277 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816407381] [2020-10-12 16:17:50,277 INFO L459 AbstractCegarLoop]: Interpolant automaton has 58 states [2020-10-12 16:17:50,277 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:17:50,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2020-10-12 16:17:50,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2020-10-12 16:17:50,278 INFO L87 Difference]: Start difference. First operand 127 states and 130 transitions. Second operand 58 states. [2020-10-12 16:17:50,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:17:50,562 INFO L93 Difference]: Finished difference Result 141 states and 148 transitions. [2020-10-12 16:17:50,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-10-12 16:17:50,562 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 124 [2020-10-12 16:17:50,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:17:50,564 INFO L225 Difference]: With dead ends: 141 [2020-10-12 16:17:50,564 INFO L226 Difference]: Without dead ends: 129 [2020-10-12 16:17:50,565 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2020-10-12 16:17:50,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-12 16:17:50,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2020-10-12 16:17:50,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-10-12 16:17:50,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 132 transitions. [2020-10-12 16:17:50,569 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 132 transitions. Word has length 124 [2020-10-12 16:17:50,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:17:50,569 INFO L479 AbstractCegarLoop]: Abstraction has 129 states and 132 transitions. [2020-10-12 16:17:50,569 INFO L480 AbstractCegarLoop]: Interpolant automaton has 58 states. [2020-10-12 16:17:50,570 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 132 transitions. [2020-10-12 16:17:50,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-10-12 16:17:50,570 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:17:50,570 INFO L422 BasicCegarLoop]: trace histogram [57, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:17:50,571 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-10-12 16:17:50,571 INFO L427 AbstractCegarLoop]: === Iteration 58 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:17:50,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:17:50,571 INFO L82 PathProgramCache]: Analyzing trace with hash -16154081, now seen corresponding path program 56 times [2020-10-12 16:17:50,571 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:17:50,572 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1303928272] [2020-10-12 16:17:50,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:17:50,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:17:50,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:50,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:51,464 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:17:51,465 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 134 [2020-10-12 16:17:51,465 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:17:51,465 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 880 [2020-10-12 16:17:51,465 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:17:51,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 58 [2020-10-12 16:17:51,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:17:51,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 115 [2020-10-12 16:17:51,465 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:17:53,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:17:53,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:17:53,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:53,283 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:17:53,283 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:17:53,283 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:17:53,283 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:17:53,284 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:17:53,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:17:53,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:17:53,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:17:53,284 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:17:53,298 INFO L134 CoverageAnalysis]: Checked inductivity of 3249 backedges. 57 proven. 3192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:17:53,298 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1303928272] [2020-10-12 16:17:53,298 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:17:53,298 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59] total 59 [2020-10-12 16:17:53,299 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229388774] [2020-10-12 16:17:53,299 INFO L459 AbstractCegarLoop]: Interpolant automaton has 59 states [2020-10-12 16:17:53,299 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:17:53,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2020-10-12 16:17:53,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2020-10-12 16:17:53,299 INFO L87 Difference]: Start difference. First operand 129 states and 132 transitions. Second operand 59 states. [2020-10-12 16:17:53,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:17:53,522 INFO L93 Difference]: Finished difference Result 143 states and 150 transitions. [2020-10-12 16:17:53,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-10-12 16:17:53,523 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 126 [2020-10-12 16:17:53,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:17:53,524 INFO L225 Difference]: With dead ends: 143 [2020-10-12 16:17:53,524 INFO L226 Difference]: Without dead ends: 131 [2020-10-12 16:17:53,525 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2020-10-12 16:17:53,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-12 16:17:53,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2020-10-12 16:17:53,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-10-12 16:17:53,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 134 transitions. [2020-10-12 16:17:53,530 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 134 transitions. Word has length 126 [2020-10-12 16:17:53,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:17:53,530 INFO L479 AbstractCegarLoop]: Abstraction has 131 states and 134 transitions. [2020-10-12 16:17:53,530 INFO L480 AbstractCegarLoop]: Interpolant automaton has 59 states. [2020-10-12 16:17:53,530 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 134 transitions. [2020-10-12 16:17:53,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-10-12 16:17:53,531 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:17:53,531 INFO L422 BasicCegarLoop]: trace histogram [58, 57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:17:53,531 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2020-10-12 16:17:53,531 INFO L427 AbstractCegarLoop]: === Iteration 59 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:17:53,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:17:53,532 INFO L82 PathProgramCache]: Analyzing trace with hash -379511460, now seen corresponding path program 57 times [2020-10-12 16:17:53,532 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:17:53,532 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1825557791] [2020-10-12 16:17:53,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:17:53,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:17:53,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:53,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:54,439 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:17:54,440 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 136 [2020-10-12 16:17:54,440 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:17:54,440 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 895 [2020-10-12 16:17:54,440 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:17:54,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 59 [2020-10-12 16:17:54,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:17:54,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 117 [2020-10-12 16:17:54,440 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:17:56,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:17:56,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:17:56,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:56,331 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:17:56,331 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:17:56,331 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:17:56,331 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:17:56,332 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:17:56,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:17:56,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:17:56,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:17:56,332 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:17:56,342 INFO L134 CoverageAnalysis]: Checked inductivity of 3364 backedges. 58 proven. 3306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:17:56,342 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1825557791] [2020-10-12 16:17:56,342 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:17:56,343 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60] total 60 [2020-10-12 16:17:56,343 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542403691] [2020-10-12 16:17:56,343 INFO L459 AbstractCegarLoop]: Interpolant automaton has 60 states [2020-10-12 16:17:56,343 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:17:56,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2020-10-12 16:17:56,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2020-10-12 16:17:56,344 INFO L87 Difference]: Start difference. First operand 131 states and 134 transitions. Second operand 60 states. [2020-10-12 16:17:56,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:17:56,618 INFO L93 Difference]: Finished difference Result 145 states and 152 transitions. [2020-10-12 16:17:56,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-10-12 16:17:56,618 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 128 [2020-10-12 16:17:56,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:17:56,619 INFO L225 Difference]: With dead ends: 145 [2020-10-12 16:17:56,619 INFO L226 Difference]: Without dead ends: 133 [2020-10-12 16:17:56,620 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2020-10-12 16:17:56,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-12 16:17:56,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2020-10-12 16:17:56,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-10-12 16:17:56,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 136 transitions. [2020-10-12 16:17:56,627 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 136 transitions. Word has length 128 [2020-10-12 16:17:56,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:17:56,627 INFO L479 AbstractCegarLoop]: Abstraction has 133 states and 136 transitions. [2020-10-12 16:17:56,627 INFO L480 AbstractCegarLoop]: Interpolant automaton has 60 states. [2020-10-12 16:17:56,627 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 136 transitions. [2020-10-12 16:17:56,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2020-10-12 16:17:56,628 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:17:56,628 INFO L422 BasicCegarLoop]: trace histogram [59, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:17:56,628 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2020-10-12 16:17:56,629 INFO L427 AbstractCegarLoop]: === Iteration 60 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:17:56,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:17:56,629 INFO L82 PathProgramCache]: Analyzing trace with hash -1673601703, now seen corresponding path program 58 times [2020-10-12 16:17:56,629 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:17:56,629 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1305234806] [2020-10-12 16:17:56,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:17:56,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:17:56,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:56,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:57,744 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:17:57,744 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 138 [2020-10-12 16:17:57,744 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:17:57,744 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1097 [2020-10-12 16:17:57,744 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:17:57,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 60 [2020-10-12 16:17:57,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:17:57,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 119 [2020-10-12 16:17:57,745 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:17:59,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:17:59,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:17:59,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:17:59,672 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:17:59,672 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:17:59,672 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:17:59,672 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:17:59,673 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:17:59,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:17:59,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:17:59,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:17:59,673 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:17:59,684 INFO L134 CoverageAnalysis]: Checked inductivity of 3481 backedges. 59 proven. 3422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:17:59,684 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1305234806] [2020-10-12 16:17:59,684 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:17:59,685 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61] total 61 [2020-10-12 16:17:59,685 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237484165] [2020-10-12 16:17:59,685 INFO L459 AbstractCegarLoop]: Interpolant automaton has 61 states [2020-10-12 16:17:59,685 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:17:59,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2020-10-12 16:17:59,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2020-10-12 16:17:59,686 INFO L87 Difference]: Start difference. First operand 133 states and 136 transitions. Second operand 61 states. [2020-10-12 16:18:00,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:18:00,011 INFO L93 Difference]: Finished difference Result 147 states and 154 transitions. [2020-10-12 16:18:00,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-10-12 16:18:00,012 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 130 [2020-10-12 16:18:00,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:18:00,013 INFO L225 Difference]: With dead ends: 147 [2020-10-12 16:18:00,013 INFO L226 Difference]: Without dead ends: 135 [2020-10-12 16:18:00,014 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2020-10-12 16:18:00,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-10-12 16:18:00,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2020-10-12 16:18:00,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-10-12 16:18:00,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 138 transitions. [2020-10-12 16:18:00,018 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 138 transitions. Word has length 130 [2020-10-12 16:18:00,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:18:00,018 INFO L479 AbstractCegarLoop]: Abstraction has 135 states and 138 transitions. [2020-10-12 16:18:00,018 INFO L480 AbstractCegarLoop]: Interpolant automaton has 61 states. [2020-10-12 16:18:00,018 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 138 transitions. [2020-10-12 16:18:00,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-10-12 16:18:00,019 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:18:00,019 INFO L422 BasicCegarLoop]: trace histogram [60, 59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:18:00,019 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2020-10-12 16:18:00,019 INFO L427 AbstractCegarLoop]: === Iteration 61 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:18:00,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:18:00,019 INFO L82 PathProgramCache]: Analyzing trace with hash 246190614, now seen corresponding path program 59 times [2020-10-12 16:18:00,020 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:18:00,020 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [187372929] [2020-10-12 16:18:00,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:18:00,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:18:00,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:00,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:00,948 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:18:00,949 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 140 [2020-10-12 16:18:00,949 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:18:00,957 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 918 [2020-10-12 16:18:00,957 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:18:00,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 61 [2020-10-12 16:18:00,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:18:00,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 121 [2020-10-12 16:18:00,957 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:18:02,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:18:02,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:18:02,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:02,966 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:18:02,966 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:18:02,966 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:18:02,966 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:18:02,966 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:18:02,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:18:02,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:18:02,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:18:02,967 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:18:02,978 INFO L134 CoverageAnalysis]: Checked inductivity of 3600 backedges. 60 proven. 3540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:18:02,978 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [187372929] [2020-10-12 16:18:02,978 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:18:02,979 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62] total 62 [2020-10-12 16:18:02,979 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981233605] [2020-10-12 16:18:02,979 INFO L459 AbstractCegarLoop]: Interpolant automaton has 62 states [2020-10-12 16:18:02,979 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:18:02,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2020-10-12 16:18:02,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2020-10-12 16:18:02,980 INFO L87 Difference]: Start difference. First operand 135 states and 138 transitions. Second operand 62 states. [2020-10-12 16:18:03,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:18:03,275 INFO L93 Difference]: Finished difference Result 149 states and 156 transitions. [2020-10-12 16:18:03,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2020-10-12 16:18:03,276 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 132 [2020-10-12 16:18:03,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:18:03,277 INFO L225 Difference]: With dead ends: 149 [2020-10-12 16:18:03,277 INFO L226 Difference]: Without dead ends: 137 [2020-10-12 16:18:03,278 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2020-10-12 16:18:03,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-10-12 16:18:03,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2020-10-12 16:18:03,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-12 16:18:03,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 140 transitions. [2020-10-12 16:18:03,281 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 140 transitions. Word has length 132 [2020-10-12 16:18:03,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:18:03,281 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 140 transitions. [2020-10-12 16:18:03,281 INFO L480 AbstractCegarLoop]: Interpolant automaton has 62 states. [2020-10-12 16:18:03,281 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 140 transitions. [2020-10-12 16:18:03,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2020-10-12 16:18:03,282 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:18:03,282 INFO L422 BasicCegarLoop]: trace histogram [61, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:18:03,282 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2020-10-12 16:18:03,282 INFO L427 AbstractCegarLoop]: === Iteration 62 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:18:03,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:18:03,283 INFO L82 PathProgramCache]: Analyzing trace with hash -1669330029, now seen corresponding path program 60 times [2020-10-12 16:18:03,283 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:18:03,283 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [183509594] [2020-10-12 16:18:03,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:18:03,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:18:03,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:03,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:04,259 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:18:04,260 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 142 [2020-10-12 16:18:04,260 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:18:04,260 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 965 [2020-10-12 16:18:04,260 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:18:04,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 62 [2020-10-12 16:18:04,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:18:04,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 123 [2020-10-12 16:18:04,261 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:18:06,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:18:06,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:18:06,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:06,309 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:18:06,309 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:18:06,309 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:18:06,310 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:18:06,310 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:18:06,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:18:06,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:18:06,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:18:06,310 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:18:06,322 INFO L134 CoverageAnalysis]: Checked inductivity of 3721 backedges. 61 proven. 3660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:18:06,322 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [183509594] [2020-10-12 16:18:06,323 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:18:06,323 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63] total 63 [2020-10-12 16:18:06,323 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288585110] [2020-10-12 16:18:06,323 INFO L459 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-10-12 16:18:06,323 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:18:06,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-10-12 16:18:06,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2020-10-12 16:18:06,324 INFO L87 Difference]: Start difference. First operand 137 states and 140 transitions. Second operand 63 states. [2020-10-12 16:18:06,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:18:06,551 INFO L93 Difference]: Finished difference Result 151 states and 158 transitions. [2020-10-12 16:18:06,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2020-10-12 16:18:06,551 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 134 [2020-10-12 16:18:06,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:18:06,552 INFO L225 Difference]: With dead ends: 151 [2020-10-12 16:18:06,553 INFO L226 Difference]: Without dead ends: 139 [2020-10-12 16:18:06,553 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2020-10-12 16:18:06,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-10-12 16:18:06,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2020-10-12 16:18:06,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-12 16:18:06,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 142 transitions. [2020-10-12 16:18:06,557 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 142 transitions. Word has length 134 [2020-10-12 16:18:06,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:18:06,557 INFO L479 AbstractCegarLoop]: Abstraction has 139 states and 142 transitions. [2020-10-12 16:18:06,557 INFO L480 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-10-12 16:18:06,557 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 142 transitions. [2020-10-12 16:18:06,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-10-12 16:18:06,558 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:18:06,558 INFO L422 BasicCegarLoop]: trace histogram [62, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:18:06,558 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2020-10-12 16:18:06,558 INFO L427 AbstractCegarLoop]: === Iteration 63 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:18:06,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:18:06,558 INFO L82 PathProgramCache]: Analyzing trace with hash 56302032, now seen corresponding path program 61 times [2020-10-12 16:18:06,558 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:18:06,558 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [719521913] [2020-10-12 16:18:06,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:18:06,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:18:06,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:06,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:07,576 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:18:07,576 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 144 [2020-10-12 16:18:07,577 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:18:07,577 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1007 [2020-10-12 16:18:07,577 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:18:07,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 63 [2020-10-12 16:18:07,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:18:07,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 125 [2020-10-12 16:18:07,578 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:18:09,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:18:09,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:18:09,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:09,693 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:18:09,694 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:18:09,694 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:18:09,694 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:18:09,694 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:18:09,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:18:09,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:18:09,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:18:09,694 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:18:09,707 INFO L134 CoverageAnalysis]: Checked inductivity of 3844 backedges. 62 proven. 3782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:18:09,707 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [719521913] [2020-10-12 16:18:09,707 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:18:09,707 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64] total 64 [2020-10-12 16:18:09,707 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966501894] [2020-10-12 16:18:09,708 INFO L459 AbstractCegarLoop]: Interpolant automaton has 64 states [2020-10-12 16:18:09,708 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:18:09,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2020-10-12 16:18:09,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2020-10-12 16:18:09,708 INFO L87 Difference]: Start difference. First operand 139 states and 142 transitions. Second operand 64 states. [2020-10-12 16:18:09,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:18:09,932 INFO L93 Difference]: Finished difference Result 153 states and 160 transitions. [2020-10-12 16:18:09,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2020-10-12 16:18:09,933 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 136 [2020-10-12 16:18:09,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:18:09,934 INFO L225 Difference]: With dead ends: 153 [2020-10-12 16:18:09,934 INFO L226 Difference]: Without dead ends: 141 [2020-10-12 16:18:09,935 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2020-10-12 16:18:09,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-10-12 16:18:09,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2020-10-12 16:18:09,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-12 16:18:09,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 144 transitions. [2020-10-12 16:18:09,939 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 144 transitions. Word has length 136 [2020-10-12 16:18:09,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:18:09,940 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 144 transitions. [2020-10-12 16:18:09,940 INFO L480 AbstractCegarLoop]: Interpolant automaton has 64 states. [2020-10-12 16:18:09,940 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 144 transitions. [2020-10-12 16:18:09,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-10-12 16:18:09,941 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:18:09,941 INFO L422 BasicCegarLoop]: trace histogram [63, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:18:09,941 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2020-10-12 16:18:09,941 INFO L427 AbstractCegarLoop]: === Iteration 64 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:18:09,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:18:09,942 INFO L82 PathProgramCache]: Analyzing trace with hash 531336397, now seen corresponding path program 62 times [2020-10-12 16:18:09,942 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:18:09,942 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [754382784] [2020-10-12 16:18:09,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:18:09,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:18:09,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:09,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:10,929 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:18:10,929 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 146 [2020-10-12 16:18:10,929 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:18:10,929 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 971 [2020-10-12 16:18:10,930 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:18:10,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 64 [2020-10-12 16:18:10,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:18:10,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 127 [2020-10-12 16:18:10,930 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:18:13,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:18:13,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:18:13,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:13,096 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:18:13,096 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:18:13,096 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:18:13,096 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:18:13,096 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:18:13,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:18:13,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:18:13,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:18:13,098 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 16:18:13,115 INFO L134 CoverageAnalysis]: Checked inductivity of 3969 backedges. 63 proven. 3906 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:18:13,115 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [754382784] [2020-10-12 16:18:13,115 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:18:13,116 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65] total 65 [2020-10-12 16:18:13,116 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647761031] [2020-10-12 16:18:13,116 INFO L459 AbstractCegarLoop]: Interpolant automaton has 65 states [2020-10-12 16:18:13,116 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:18:13,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2020-10-12 16:18:13,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2020-10-12 16:18:13,117 INFO L87 Difference]: Start difference. First operand 141 states and 144 transitions. Second operand 65 states. [2020-10-12 16:18:13,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:18:13,341 INFO L93 Difference]: Finished difference Result 155 states and 162 transitions. [2020-10-12 16:18:13,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2020-10-12 16:18:13,341 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 138 [2020-10-12 16:18:13,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:18:13,343 INFO L225 Difference]: With dead ends: 155 [2020-10-12 16:18:13,343 INFO L226 Difference]: Without dead ends: 143 [2020-10-12 16:18:13,344 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2020-10-12 16:18:13,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-10-12 16:18:13,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2020-10-12 16:18:13,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-12 16:18:13,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 146 transitions. [2020-10-12 16:18:13,348 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 146 transitions. Word has length 138 [2020-10-12 16:18:13,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:18:13,348 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 146 transitions. [2020-10-12 16:18:13,348 INFO L480 AbstractCegarLoop]: Interpolant automaton has 65 states. [2020-10-12 16:18:13,348 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 146 transitions. [2020-10-12 16:18:13,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2020-10-12 16:18:13,349 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:18:13,349 INFO L422 BasicCegarLoop]: trace histogram [64, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:18:13,349 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2020-10-12 16:18:13,349 INFO L427 AbstractCegarLoop]: === Iteration 65 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:18:13,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:18:13,350 INFO L82 PathProgramCache]: Analyzing trace with hash 1772827786, now seen corresponding path program 63 times [2020-10-12 16:18:13,350 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:18:13,350 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [103119034] [2020-10-12 16:18:13,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:18:13,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:18:13,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:13,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:14,536 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:18:14,536 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 148 [2020-10-12 16:18:14,536 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:18:14,536 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1169 [2020-10-12 16:18:14,536 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:18:14,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 65 [2020-10-12 16:18:14,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:18:14,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 129 [2020-10-12 16:18:14,537 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:18:16,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:18:16,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:18:16,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:16,795 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:18:16,795 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:18:16,795 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:18:16,795 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:18:16,795 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:18:16,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:18:16,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:18:16,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:18:16,796 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:18:16,810 INFO L134 CoverageAnalysis]: Checked inductivity of 4096 backedges. 64 proven. 4032 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:18:16,810 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [103119034] [2020-10-12 16:18:16,810 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:18:16,810 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66] total 66 [2020-10-12 16:18:16,810 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113763387] [2020-10-12 16:18:16,811 INFO L459 AbstractCegarLoop]: Interpolant automaton has 66 states [2020-10-12 16:18:16,811 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:18:16,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2020-10-12 16:18:16,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2020-10-12 16:18:16,811 INFO L87 Difference]: Start difference. First operand 143 states and 146 transitions. Second operand 66 states. [2020-10-12 16:18:17,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:18:17,046 INFO L93 Difference]: Finished difference Result 157 states and 164 transitions. [2020-10-12 16:18:17,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2020-10-12 16:18:17,046 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 140 [2020-10-12 16:18:17,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:18:17,048 INFO L225 Difference]: With dead ends: 157 [2020-10-12 16:18:17,048 INFO L226 Difference]: Without dead ends: 145 [2020-10-12 16:18:17,049 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2020-10-12 16:18:17,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-10-12 16:18:17,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2020-10-12 16:18:17,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-12 16:18:17,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 148 transitions. [2020-10-12 16:18:17,054 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 148 transitions. Word has length 140 [2020-10-12 16:18:17,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:18:17,054 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 148 transitions. [2020-10-12 16:18:17,054 INFO L480 AbstractCegarLoop]: Interpolant automaton has 66 states. [2020-10-12 16:18:17,054 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 148 transitions. [2020-10-12 16:18:17,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-10-12 16:18:17,055 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:18:17,055 INFO L422 BasicCegarLoop]: trace histogram [65, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:18:17,056 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2020-10-12 16:18:17,056 INFO L427 AbstractCegarLoop]: === Iteration 66 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:18:17,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:18:17,056 INFO L82 PathProgramCache]: Analyzing trace with hash 845144327, now seen corresponding path program 64 times [2020-10-12 16:18:17,056 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:18:17,056 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [973188389] [2020-10-12 16:18:17,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:18:17,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:18:17,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:17,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:18,179 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:18:18,180 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 150 [2020-10-12 16:18:18,180 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:18:18,180 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1107 [2020-10-12 16:18:18,180 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:18:18,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 66 [2020-10-12 16:18:18,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:18:18,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 131 [2020-10-12 16:18:18,180 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:18:20,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:18:20,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:18:20,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:20,512 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:18:20,512 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:18:20,513 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:18:20,513 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:18:20,513 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:18:20,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:18:20,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:18:20,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:18:20,513 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:18:20,528 INFO L134 CoverageAnalysis]: Checked inductivity of 4225 backedges. 65 proven. 4160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:18:20,529 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [973188389] [2020-10-12 16:18:20,529 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:18:20,529 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67] total 67 [2020-10-12 16:18:20,529 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990761953] [2020-10-12 16:18:20,529 INFO L459 AbstractCegarLoop]: Interpolant automaton has 67 states [2020-10-12 16:18:20,530 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:18:20,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2020-10-12 16:18:20,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2020-10-12 16:18:20,530 INFO L87 Difference]: Start difference. First operand 145 states and 148 transitions. Second operand 67 states. [2020-10-12 16:18:20,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:18:20,764 INFO L93 Difference]: Finished difference Result 159 states and 166 transitions. [2020-10-12 16:18:20,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2020-10-12 16:18:20,765 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 142 [2020-10-12 16:18:20,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:18:20,766 INFO L225 Difference]: With dead ends: 159 [2020-10-12 16:18:20,766 INFO L226 Difference]: Without dead ends: 147 [2020-10-12 16:18:20,767 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2020-10-12 16:18:20,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-10-12 16:18:20,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2020-10-12 16:18:20,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-10-12 16:18:20,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 150 transitions. [2020-10-12 16:18:20,771 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 150 transitions. Word has length 142 [2020-10-12 16:18:20,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:18:20,771 INFO L479 AbstractCegarLoop]: Abstraction has 147 states and 150 transitions. [2020-10-12 16:18:20,771 INFO L480 AbstractCegarLoop]: Interpolant automaton has 67 states. [2020-10-12 16:18:20,772 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 150 transitions. [2020-10-12 16:18:20,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2020-10-12 16:18:20,772 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:18:20,772 INFO L422 BasicCegarLoop]: trace histogram [66, 65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:18:20,772 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2020-10-12 16:18:20,772 INFO L427 AbstractCegarLoop]: === Iteration 67 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:18:20,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:18:20,773 INFO L82 PathProgramCache]: Analyzing trace with hash -1600429500, now seen corresponding path program 65 times [2020-10-12 16:18:20,773 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:18:20,773 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1024895222] [2020-10-12 16:18:20,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:18:20,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:18:20,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:20,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:21,914 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:18:21,915 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 152 [2020-10-12 16:18:21,915 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:18:21,915 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1131 [2020-10-12 16:18:21,915 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:18:21,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 67 [2020-10-12 16:18:21,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:18:21,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 133 [2020-10-12 16:18:21,915 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:18:24,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:18:24,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:18:24,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:24,317 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:18:24,317 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:18:24,318 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:18:24,318 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:18:24,318 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:18:24,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:18:24,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:18:24,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:18:24,318 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:18:24,333 INFO L134 CoverageAnalysis]: Checked inductivity of 4356 backedges. 66 proven. 4290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:18:24,333 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1024895222] [2020-10-12 16:18:24,333 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:18:24,333 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68] total 68 [2020-10-12 16:18:24,333 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093644378] [2020-10-12 16:18:24,334 INFO L459 AbstractCegarLoop]: Interpolant automaton has 68 states [2020-10-12 16:18:24,334 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:18:24,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2020-10-12 16:18:24,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2020-10-12 16:18:24,335 INFO L87 Difference]: Start difference. First operand 147 states and 150 transitions. Second operand 68 states. [2020-10-12 16:18:24,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:18:24,555 INFO L93 Difference]: Finished difference Result 161 states and 168 transitions. [2020-10-12 16:18:24,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2020-10-12 16:18:24,556 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 144 [2020-10-12 16:18:24,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:18:24,557 INFO L225 Difference]: With dead ends: 161 [2020-10-12 16:18:24,558 INFO L226 Difference]: Without dead ends: 149 [2020-10-12 16:18:24,559 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2020-10-12 16:18:24,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-10-12 16:18:24,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2020-10-12 16:18:24,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-10-12 16:18:24,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 152 transitions. [2020-10-12 16:18:24,562 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 152 transitions. Word has length 144 [2020-10-12 16:18:24,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:18:24,563 INFO L479 AbstractCegarLoop]: Abstraction has 149 states and 152 transitions. [2020-10-12 16:18:24,563 INFO L480 AbstractCegarLoop]: Interpolant automaton has 68 states. [2020-10-12 16:18:24,563 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 152 transitions. [2020-10-12 16:18:24,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-10-12 16:18:24,563 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:18:24,564 INFO L422 BasicCegarLoop]: trace histogram [67, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:18:24,564 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2020-10-12 16:18:24,564 INFO L427 AbstractCegarLoop]: === Iteration 68 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:18:24,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:18:24,564 INFO L82 PathProgramCache]: Analyzing trace with hash 1845200961, now seen corresponding path program 66 times [2020-10-12 16:18:24,564 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:18:24,564 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1725233651] [2020-10-12 16:18:24,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:18:24,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:18:24,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:24,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:25,709 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:18:25,710 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 154 [2020-10-12 16:18:25,710 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:18:25,710 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1133 [2020-10-12 16:18:25,710 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:18:25,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 68 [2020-10-12 16:18:25,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:18:25,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 135 [2020-10-12 16:18:25,710 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:18:28,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:18:28,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:18:28,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:28,247 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:18:28,247 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:18:28,247 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:18:28,247 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:18:28,247 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:18:28,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:18:28,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:18:28,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:18:28,248 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:18:28,262 INFO L134 CoverageAnalysis]: Checked inductivity of 4489 backedges. 67 proven. 4422 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:18:28,263 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1725233651] [2020-10-12 16:18:28,263 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:18:28,263 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69] total 69 [2020-10-12 16:18:28,263 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125273150] [2020-10-12 16:18:28,263 INFO L459 AbstractCegarLoop]: Interpolant automaton has 69 states [2020-10-12 16:18:28,263 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:18:28,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2020-10-12 16:18:28,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2020-10-12 16:18:28,264 INFO L87 Difference]: Start difference. First operand 149 states and 152 transitions. Second operand 69 states. [2020-10-12 16:18:28,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:18:28,590 INFO L93 Difference]: Finished difference Result 163 states and 170 transitions. [2020-10-12 16:18:28,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2020-10-12 16:18:28,591 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 146 [2020-10-12 16:18:28,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:18:28,592 INFO L225 Difference]: With dead ends: 163 [2020-10-12 16:18:28,592 INFO L226 Difference]: Without dead ends: 151 [2020-10-12 16:18:28,593 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2020-10-12 16:18:28,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-10-12 16:18:28,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2020-10-12 16:18:28,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-10-12 16:18:28,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 154 transitions. [2020-10-12 16:18:28,597 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 154 transitions. Word has length 146 [2020-10-12 16:18:28,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:18:28,598 INFO L479 AbstractCegarLoop]: Abstraction has 151 states and 154 transitions. [2020-10-12 16:18:28,598 INFO L480 AbstractCegarLoop]: Interpolant automaton has 69 states. [2020-10-12 16:18:28,598 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 154 transitions. [2020-10-12 16:18:28,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-10-12 16:18:28,599 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:18:28,599 INFO L422 BasicCegarLoop]: trace histogram [68, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:18:28,599 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2020-10-12 16:18:28,600 INFO L427 AbstractCegarLoop]: === Iteration 69 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:18:28,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:18:28,600 INFO L82 PathProgramCache]: Analyzing trace with hash 1676288766, now seen corresponding path program 67 times [2020-10-12 16:18:28,600 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:18:28,600 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [125581016] [2020-10-12 16:18:28,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:18:28,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:18:28,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:28,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:29,786 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:18:29,786 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 156 [2020-10-12 16:18:29,786 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:18:29,786 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1169 [2020-10-12 16:18:29,786 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:18:29,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 69 [2020-10-12 16:18:29,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:18:29,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 137 [2020-10-12 16:18:29,787 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:18:32,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:18:32,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:18:32,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:32,362 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:18:32,362 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:18:32,362 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:18:32,362 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:18:32,363 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:18:32,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:18:32,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:18:32,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:18:32,363 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:18:32,379 INFO L134 CoverageAnalysis]: Checked inductivity of 4624 backedges. 68 proven. 4556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:18:32,380 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [125581016] [2020-10-12 16:18:32,380 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:18:32,380 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70] total 70 [2020-10-12 16:18:32,380 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956553058] [2020-10-12 16:18:32,380 INFO L459 AbstractCegarLoop]: Interpolant automaton has 70 states [2020-10-12 16:18:32,381 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:18:32,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2020-10-12 16:18:32,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2020-10-12 16:18:32,382 INFO L87 Difference]: Start difference. First operand 151 states and 154 transitions. Second operand 70 states. [2020-10-12 16:18:32,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:18:32,766 INFO L93 Difference]: Finished difference Result 165 states and 172 transitions. [2020-10-12 16:18:32,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2020-10-12 16:18:32,766 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 148 [2020-10-12 16:18:32,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:18:32,768 INFO L225 Difference]: With dead ends: 165 [2020-10-12 16:18:32,768 INFO L226 Difference]: Without dead ends: 153 [2020-10-12 16:18:32,768 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2020-10-12 16:18:32,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-10-12 16:18:32,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2020-10-12 16:18:32,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-10-12 16:18:32,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 156 transitions. [2020-10-12 16:18:32,773 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 156 transitions. Word has length 148 [2020-10-12 16:18:32,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:18:32,773 INFO L479 AbstractCegarLoop]: Abstraction has 153 states and 156 transitions. [2020-10-12 16:18:32,773 INFO L480 AbstractCegarLoop]: Interpolant automaton has 70 states. [2020-10-12 16:18:32,773 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 156 transitions. [2020-10-12 16:18:32,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2020-10-12 16:18:32,774 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:18:32,774 INFO L422 BasicCegarLoop]: trace histogram [69, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:18:32,774 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2020-10-12 16:18:32,774 INFO L427 AbstractCegarLoop]: === Iteration 70 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:18:32,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:18:32,775 INFO L82 PathProgramCache]: Analyzing trace with hash -1734540677, now seen corresponding path program 68 times [2020-10-12 16:18:32,775 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:18:32,775 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [808848091] [2020-10-12 16:18:32,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:18:32,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:18:32,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:32,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:34,023 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:18:34,023 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 158 [2020-10-12 16:18:34,024 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:18:34,024 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1236 [2020-10-12 16:18:34,024 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:18:34,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 70 [2020-10-12 16:18:34,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:18:34,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 139 [2020-10-12 16:18:34,024 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:18:36,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:18:36,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:18:36,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:36,674 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:18:36,674 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:18:36,674 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:18:36,674 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:18:36,674 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:18:36,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:18:36,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:18:36,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:18:36,675 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:18:36,689 INFO L134 CoverageAnalysis]: Checked inductivity of 4761 backedges. 69 proven. 4692 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:18:36,689 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [808848091] [2020-10-12 16:18:36,690 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:18:36,690 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71] total 71 [2020-10-12 16:18:36,690 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088710168] [2020-10-12 16:18:36,690 INFO L459 AbstractCegarLoop]: Interpolant automaton has 71 states [2020-10-12 16:18:36,690 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:18:36,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2020-10-12 16:18:36,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2020-10-12 16:18:36,691 INFO L87 Difference]: Start difference. First operand 153 states and 156 transitions. Second operand 71 states. [2020-10-12 16:18:37,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:18:37,068 INFO L93 Difference]: Finished difference Result 167 states and 174 transitions. [2020-10-12 16:18:37,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2020-10-12 16:18:37,069 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 150 [2020-10-12 16:18:37,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:18:37,070 INFO L225 Difference]: With dead ends: 167 [2020-10-12 16:18:37,070 INFO L226 Difference]: Without dead ends: 155 [2020-10-12 16:18:37,071 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2020-10-12 16:18:37,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-10-12 16:18:37,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2020-10-12 16:18:37,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-10-12 16:18:37,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 158 transitions. [2020-10-12 16:18:37,076 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 158 transitions. Word has length 150 [2020-10-12 16:18:37,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:18:37,076 INFO L479 AbstractCegarLoop]: Abstraction has 155 states and 158 transitions. [2020-10-12 16:18:37,076 INFO L480 AbstractCegarLoop]: Interpolant automaton has 71 states. [2020-10-12 16:18:37,076 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 158 transitions. [2020-10-12 16:18:37,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-10-12 16:18:37,077 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:18:37,077 INFO L422 BasicCegarLoop]: trace histogram [70, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:18:37,078 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2020-10-12 16:18:37,078 INFO L427 AbstractCegarLoop]: === Iteration 71 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:18:37,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:18:37,078 INFO L82 PathProgramCache]: Analyzing trace with hash 1813378744, now seen corresponding path program 69 times [2020-10-12 16:18:37,078 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:18:37,078 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1602168610] [2020-10-12 16:18:37,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:18:37,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:18:37,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:37,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:38,778 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:18:38,778 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 160 [2020-10-12 16:18:38,778 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:18:38,779 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1681 [2020-10-12 16:18:38,779 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:18:38,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 71 [2020-10-12 16:18:38,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:18:38,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 141 [2020-10-12 16:18:38,779 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:18:41,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:18:41,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:18:41,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:41,499 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:18:41,499 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:18:41,500 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:18:41,500 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:18:41,500 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:18:41,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:18:41,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:18:41,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:18:41,501 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:18:41,515 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 70 proven. 4830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:18:41,515 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1602168610] [2020-10-12 16:18:41,516 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:18:41,516 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72] total 72 [2020-10-12 16:18:41,516 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870459759] [2020-10-12 16:18:41,516 INFO L459 AbstractCegarLoop]: Interpolant automaton has 72 states [2020-10-12 16:18:41,516 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:18:41,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2020-10-12 16:18:41,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2020-10-12 16:18:41,517 INFO L87 Difference]: Start difference. First operand 155 states and 158 transitions. Second operand 72 states. [2020-10-12 16:18:41,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:18:41,792 INFO L93 Difference]: Finished difference Result 169 states and 176 transitions. [2020-10-12 16:18:41,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2020-10-12 16:18:41,792 INFO L78 Accepts]: Start accepts. Automaton has 72 states. Word has length 152 [2020-10-12 16:18:41,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:18:41,794 INFO L225 Difference]: With dead ends: 169 [2020-10-12 16:18:41,794 INFO L226 Difference]: Without dead ends: 157 [2020-10-12 16:18:41,794 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2020-10-12 16:18:41,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-10-12 16:18:41,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2020-10-12 16:18:41,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-10-12 16:18:41,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 160 transitions. [2020-10-12 16:18:41,798 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 160 transitions. Word has length 152 [2020-10-12 16:18:41,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:18:41,799 INFO L479 AbstractCegarLoop]: Abstraction has 157 states and 160 transitions. [2020-10-12 16:18:41,799 INFO L480 AbstractCegarLoop]: Interpolant automaton has 72 states. [2020-10-12 16:18:41,799 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 160 transitions. [2020-10-12 16:18:41,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2020-10-12 16:18:41,799 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:18:41,799 INFO L422 BasicCegarLoop]: trace histogram [71, 70, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:18:41,800 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2020-10-12 16:18:41,800 INFO L427 AbstractCegarLoop]: === Iteration 72 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:18:41,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:18:41,800 INFO L82 PathProgramCache]: Analyzing trace with hash 1159909301, now seen corresponding path program 70 times [2020-10-12 16:18:41,800 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:18:41,800 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [379638370] [2020-10-12 16:18:41,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:18:41,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:18:41,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:41,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:43,333 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:18:43,333 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 162 [2020-10-12 16:18:43,333 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:18:43,333 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1521 [2020-10-12 16:18:43,333 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:18:43,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 72 [2020-10-12 16:18:43,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:18:43,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 143 [2020-10-12 16:18:43,334 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:18:46,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:18:46,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:18:46,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:46,179 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:18:46,179 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:18:46,179 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:18:46,179 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:18:46,180 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:18:46,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:18:46,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:18:46,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:18:46,180 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:18:46,196 INFO L134 CoverageAnalysis]: Checked inductivity of 5041 backedges. 71 proven. 4970 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:18:46,196 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [379638370] [2020-10-12 16:18:46,196 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:18:46,197 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73] total 73 [2020-10-12 16:18:46,197 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578454177] [2020-10-12 16:18:46,197 INFO L459 AbstractCegarLoop]: Interpolant automaton has 73 states [2020-10-12 16:18:46,197 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:18:46,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2020-10-12 16:18:46,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2020-10-12 16:18:46,198 INFO L87 Difference]: Start difference. First operand 157 states and 160 transitions. Second operand 73 states. [2020-10-12 16:18:46,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:18:46,604 INFO L93 Difference]: Finished difference Result 171 states and 178 transitions. [2020-10-12 16:18:46,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2020-10-12 16:18:46,605 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 154 [2020-10-12 16:18:46,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:18:46,606 INFO L225 Difference]: With dead ends: 171 [2020-10-12 16:18:46,606 INFO L226 Difference]: Without dead ends: 159 [2020-10-12 16:18:46,607 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2020-10-12 16:18:46,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-10-12 16:18:46,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 159. [2020-10-12 16:18:46,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-10-12 16:18:46,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 162 transitions. [2020-10-12 16:18:46,610 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 162 transitions. Word has length 154 [2020-10-12 16:18:46,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:18:46,610 INFO L479 AbstractCegarLoop]: Abstraction has 159 states and 162 transitions. [2020-10-12 16:18:46,610 INFO L480 AbstractCegarLoop]: Interpolant automaton has 73 states. [2020-10-12 16:18:46,611 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 162 transitions. [2020-10-12 16:18:46,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2020-10-12 16:18:46,611 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:18:46,611 INFO L422 BasicCegarLoop]: trace histogram [72, 71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:18:46,611 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2020-10-12 16:18:46,612 INFO L427 AbstractCegarLoop]: === Iteration 73 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:18:46,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:18:46,612 INFO L82 PathProgramCache]: Analyzing trace with hash 240999794, now seen corresponding path program 71 times [2020-10-12 16:18:46,612 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:18:46,612 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [596164116] [2020-10-12 16:18:46,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:18:46,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:18:46,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:46,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:47,967 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:18:47,967 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 164 [2020-10-12 16:18:47,967 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:18:47,968 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1343 [2020-10-12 16:18:47,968 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:18:47,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 73 [2020-10-12 16:18:47,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:18:47,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 145 [2020-10-12 16:18:47,968 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:18:50,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:18:50,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:18:50,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:50,893 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:18:50,894 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:18:50,894 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:18:50,894 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:18:50,894 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:18:50,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:18:50,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:18:50,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:18:50,895 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:18:50,914 INFO L134 CoverageAnalysis]: Checked inductivity of 5184 backedges. 72 proven. 5112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:18:50,914 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [596164116] [2020-10-12 16:18:50,914 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:18:50,914 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74] total 74 [2020-10-12 16:18:50,914 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297592121] [2020-10-12 16:18:50,915 INFO L459 AbstractCegarLoop]: Interpolant automaton has 74 states [2020-10-12 16:18:50,915 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:18:50,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2020-10-12 16:18:50,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2020-10-12 16:18:50,916 INFO L87 Difference]: Start difference. First operand 159 states and 162 transitions. Second operand 74 states. [2020-10-12 16:18:51,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:18:51,343 INFO L93 Difference]: Finished difference Result 173 states and 180 transitions. [2020-10-12 16:18:51,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2020-10-12 16:18:51,344 INFO L78 Accepts]: Start accepts. Automaton has 74 states. Word has length 156 [2020-10-12 16:18:51,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:18:51,345 INFO L225 Difference]: With dead ends: 173 [2020-10-12 16:18:51,346 INFO L226 Difference]: Without dead ends: 161 [2020-10-12 16:18:51,347 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2020-10-12 16:18:51,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-10-12 16:18:51,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2020-10-12 16:18:51,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-10-12 16:18:51,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 164 transitions. [2020-10-12 16:18:51,350 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 164 transitions. Word has length 156 [2020-10-12 16:18:51,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:18:51,350 INFO L479 AbstractCegarLoop]: Abstraction has 161 states and 164 transitions. [2020-10-12 16:18:51,351 INFO L480 AbstractCegarLoop]: Interpolant automaton has 74 states. [2020-10-12 16:18:51,351 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 164 transitions. [2020-10-12 16:18:51,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2020-10-12 16:18:51,351 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:18:51,351 INFO L422 BasicCegarLoop]: trace histogram [73, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:18:51,352 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2020-10-12 16:18:51,352 INFO L427 AbstractCegarLoop]: === Iteration 74 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:18:51,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:18:51,352 INFO L82 PathProgramCache]: Analyzing trace with hash 1932226543, now seen corresponding path program 72 times [2020-10-12 16:18:51,352 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:18:51,352 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1664396056] [2020-10-12 16:18:51,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:18:51,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:18:51,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:51,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:52,834 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:18:52,834 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 166 [2020-10-12 16:18:52,835 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:18:52,835 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1470 [2020-10-12 16:18:52,835 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:18:52,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 74 [2020-10-12 16:18:52,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:18:52,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 147 [2020-10-12 16:18:52,835 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:18:55,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:18:55,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:18:55,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:55,851 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:18:55,852 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:18:55,852 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:18:55,852 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:18:55,852 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:18:55,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:18:55,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:18:55,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:18:55,852 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:18:55,869 INFO L134 CoverageAnalysis]: Checked inductivity of 5329 backedges. 73 proven. 5256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:18:55,869 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1664396056] [2020-10-12 16:18:55,869 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:18:55,869 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75] total 75 [2020-10-12 16:18:55,869 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787853703] [2020-10-12 16:18:55,869 INFO L459 AbstractCegarLoop]: Interpolant automaton has 75 states [2020-10-12 16:18:55,869 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:18:55,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2020-10-12 16:18:55,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2020-10-12 16:18:55,870 INFO L87 Difference]: Start difference. First operand 161 states and 164 transitions. Second operand 75 states. [2020-10-12 16:18:56,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:18:56,259 INFO L93 Difference]: Finished difference Result 175 states and 182 transitions. [2020-10-12 16:18:56,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2020-10-12 16:18:56,260 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 158 [2020-10-12 16:18:56,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:18:56,261 INFO L225 Difference]: With dead ends: 175 [2020-10-12 16:18:56,261 INFO L226 Difference]: Without dead ends: 163 [2020-10-12 16:18:56,262 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2020-10-12 16:18:56,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-10-12 16:18:56,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2020-10-12 16:18:56,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-12 16:18:56,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 166 transitions. [2020-10-12 16:18:56,265 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 166 transitions. Word has length 158 [2020-10-12 16:18:56,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:18:56,265 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 166 transitions. [2020-10-12 16:18:56,265 INFO L480 AbstractCegarLoop]: Interpolant automaton has 75 states. [2020-10-12 16:18:56,266 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 166 transitions. [2020-10-12 16:18:56,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-10-12 16:18:56,266 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:18:56,266 INFO L422 BasicCegarLoop]: trace histogram [74, 73, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:18:56,267 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2020-10-12 16:18:56,267 INFO L427 AbstractCegarLoop]: === Iteration 75 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:18:56,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:18:56,267 INFO L82 PathProgramCache]: Analyzing trace with hash -591472852, now seen corresponding path program 73 times [2020-10-12 16:18:56,267 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:18:56,267 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [656903054] [2020-10-12 16:18:56,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:18:56,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:18:56,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:56,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:18:57,723 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:18:57,723 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 168 [2020-10-12 16:18:57,723 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:18:57,723 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1438 [2020-10-12 16:18:57,724 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:18:57,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 75 [2020-10-12 16:18:57,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:18:57,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 149 [2020-10-12 16:18:57,724 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:00,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:19:00,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:00,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:00,836 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:00,836 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:19:00,836 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:19:00,836 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:19:00,836 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:00,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:19:00,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:19:00,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:19:00,837 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:00,853 INFO L134 CoverageAnalysis]: Checked inductivity of 5476 backedges. 74 proven. 5402 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:19:00,853 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [656903054] [2020-10-12 16:19:00,853 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:19:00,853 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76] total 76 [2020-10-12 16:19:00,853 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729774894] [2020-10-12 16:19:00,853 INFO L459 AbstractCegarLoop]: Interpolant automaton has 76 states [2020-10-12 16:19:00,853 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:19:00,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2020-10-12 16:19:00,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2020-10-12 16:19:00,854 INFO L87 Difference]: Start difference. First operand 163 states and 166 transitions. Second operand 76 states. [2020-10-12 16:19:01,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:19:01,123 INFO L93 Difference]: Finished difference Result 177 states and 184 transitions. [2020-10-12 16:19:01,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2020-10-12 16:19:01,123 INFO L78 Accepts]: Start accepts. Automaton has 76 states. Word has length 160 [2020-10-12 16:19:01,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:19:01,125 INFO L225 Difference]: With dead ends: 177 [2020-10-12 16:19:01,125 INFO L226 Difference]: Without dead ends: 165 [2020-10-12 16:19:01,126 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2020-10-12 16:19:01,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-10-12 16:19:01,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2020-10-12 16:19:01,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-10-12 16:19:01,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 168 transitions. [2020-10-12 16:19:01,130 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 168 transitions. Word has length 160 [2020-10-12 16:19:01,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:19:01,130 INFO L479 AbstractCegarLoop]: Abstraction has 165 states and 168 transitions. [2020-10-12 16:19:01,130 INFO L480 AbstractCegarLoop]: Interpolant automaton has 76 states. [2020-10-12 16:19:01,130 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 168 transitions. [2020-10-12 16:19:01,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2020-10-12 16:19:01,131 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:19:01,131 INFO L422 BasicCegarLoop]: trace histogram [75, 74, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:19:01,131 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2020-10-12 16:19:01,131 INFO L427 AbstractCegarLoop]: === Iteration 76 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:19:01,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:19:01,132 INFO L82 PathProgramCache]: Analyzing trace with hash 789930793, now seen corresponding path program 74 times [2020-10-12 16:19:01,132 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:19:01,132 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1037839549] [2020-10-12 16:19:01,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:19:01,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:01,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:01,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:02,651 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:02,651 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 170 [2020-10-12 16:19:02,651 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:19:02,651 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1506 [2020-10-12 16:19:02,651 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:02,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 76 [2020-10-12 16:19:02,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:19:02,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 151 [2020-10-12 16:19:02,652 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:05,876 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:19:05,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:05,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:05,878 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:05,878 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:19:05,878 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:19:05,878 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:19:05,878 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:05,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:19:05,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:19:05,879 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:19:05,879 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:05,908 INFO L134 CoverageAnalysis]: Checked inductivity of 5625 backedges. 75 proven. 5550 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:19:05,909 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1037839549] [2020-10-12 16:19:05,909 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:19:05,909 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [77] total 77 [2020-10-12 16:19:05,909 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661076635] [2020-10-12 16:19:05,909 INFO L459 AbstractCegarLoop]: Interpolant automaton has 77 states [2020-10-12 16:19:05,909 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:19:05,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2020-10-12 16:19:05,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2020-10-12 16:19:05,910 INFO L87 Difference]: Start difference. First operand 165 states and 168 transitions. Second operand 77 states. [2020-10-12 16:19:06,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:19:06,380 INFO L93 Difference]: Finished difference Result 179 states and 186 transitions. [2020-10-12 16:19:06,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2020-10-12 16:19:06,381 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 162 [2020-10-12 16:19:06,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:19:06,382 INFO L225 Difference]: With dead ends: 179 [2020-10-12 16:19:06,382 INFO L226 Difference]: Without dead ends: 167 [2020-10-12 16:19:06,383 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2020-10-12 16:19:06,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-10-12 16:19:06,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 167. [2020-10-12 16:19:06,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-12 16:19:06,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 170 transitions. [2020-10-12 16:19:06,387 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 170 transitions. Word has length 162 [2020-10-12 16:19:06,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:19:06,387 INFO L479 AbstractCegarLoop]: Abstraction has 167 states and 170 transitions. [2020-10-12 16:19:06,387 INFO L480 AbstractCegarLoop]: Interpolant automaton has 77 states. [2020-10-12 16:19:06,388 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 170 transitions. [2020-10-12 16:19:06,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2020-10-12 16:19:06,388 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:19:06,389 INFO L422 BasicCegarLoop]: trace histogram [76, 75, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:19:06,389 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2020-10-12 16:19:06,389 INFO L427 AbstractCegarLoop]: === Iteration 77 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:19:06,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:19:06,389 INFO L82 PathProgramCache]: Analyzing trace with hash 1173939174, now seen corresponding path program 75 times [2020-10-12 16:19:06,389 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:19:06,390 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1058647143] [2020-10-12 16:19:06,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:19:06,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:06,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:06,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:07,934 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:07,934 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 172 [2020-10-12 16:19:07,934 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:19:07,934 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1532 [2020-10-12 16:19:07,934 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:07,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 77 [2020-10-12 16:19:07,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:19:07,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 153 [2020-10-12 16:19:07,935 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:11,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:19:11,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:11,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:11,242 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:11,243 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:19:11,243 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:19:11,243 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:19:11,243 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:11,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:19:11,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:19:11,244 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:19:11,244 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:11,261 INFO L134 CoverageAnalysis]: Checked inductivity of 5776 backedges. 76 proven. 5700 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:19:11,261 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1058647143] [2020-10-12 16:19:11,262 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:19:11,262 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [78] total 78 [2020-10-12 16:19:11,262 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401348914] [2020-10-12 16:19:11,262 INFO L459 AbstractCegarLoop]: Interpolant automaton has 78 states [2020-10-12 16:19:11,262 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:19:11,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2020-10-12 16:19:11,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2020-10-12 16:19:11,263 INFO L87 Difference]: Start difference. First operand 167 states and 170 transitions. Second operand 78 states. [2020-10-12 16:19:11,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:19:11,602 INFO L93 Difference]: Finished difference Result 181 states and 188 transitions. [2020-10-12 16:19:11,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2020-10-12 16:19:11,602 INFO L78 Accepts]: Start accepts. Automaton has 78 states. Word has length 164 [2020-10-12 16:19:11,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:19:11,604 INFO L225 Difference]: With dead ends: 181 [2020-10-12 16:19:11,604 INFO L226 Difference]: Without dead ends: 169 [2020-10-12 16:19:11,604 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2020-10-12 16:19:11,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-10-12 16:19:11,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 169. [2020-10-12 16:19:11,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-12 16:19:11,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 172 transitions. [2020-10-12 16:19:11,609 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 172 transitions. Word has length 164 [2020-10-12 16:19:11,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:19:11,610 INFO L479 AbstractCegarLoop]: Abstraction has 169 states and 172 transitions. [2020-10-12 16:19:11,610 INFO L480 AbstractCegarLoop]: Interpolant automaton has 78 states. [2020-10-12 16:19:11,610 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 172 transitions. [2020-10-12 16:19:11,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2020-10-12 16:19:11,611 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:19:11,611 INFO L422 BasicCegarLoop]: trace histogram [77, 76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:19:11,611 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2020-10-12 16:19:11,611 INFO L427 AbstractCegarLoop]: === Iteration 78 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:19:11,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:19:11,612 INFO L82 PathProgramCache]: Analyzing trace with hash 838805859, now seen corresponding path program 76 times [2020-10-12 16:19:11,612 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:19:11,612 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2060343071] [2020-10-12 16:19:11,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:19:11,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:11,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:11,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:13,235 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:13,235 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 174 [2020-10-12 16:19:13,235 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:19:13,235 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1604 [2020-10-12 16:19:13,236 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:13,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 78 [2020-10-12 16:19:13,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:19:13,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 155 [2020-10-12 16:19:13,236 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:16,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:19:16,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:16,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:16,659 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:16,659 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:19:16,659 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:19:16,659 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:19:16,659 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:16,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:19:16,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:19:16,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:19:16,660 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:16,678 INFO L134 CoverageAnalysis]: Checked inductivity of 5929 backedges. 77 proven. 5852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:19:16,679 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2060343071] [2020-10-12 16:19:16,679 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:19:16,679 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [79] total 79 [2020-10-12 16:19:16,679 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109354101] [2020-10-12 16:19:16,679 INFO L459 AbstractCegarLoop]: Interpolant automaton has 79 states [2020-10-12 16:19:16,679 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:19:16,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2020-10-12 16:19:16,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2020-10-12 16:19:16,680 INFO L87 Difference]: Start difference. First operand 169 states and 172 transitions. Second operand 79 states. [2020-10-12 16:19:17,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:19:17,165 INFO L93 Difference]: Finished difference Result 183 states and 190 transitions. [2020-10-12 16:19:17,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2020-10-12 16:19:17,166 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 166 [2020-10-12 16:19:17,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:19:17,168 INFO L225 Difference]: With dead ends: 183 [2020-10-12 16:19:17,168 INFO L226 Difference]: Without dead ends: 171 [2020-10-12 16:19:17,169 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2020-10-12 16:19:17,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-10-12 16:19:17,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2020-10-12 16:19:17,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-10-12 16:19:17,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 174 transitions. [2020-10-12 16:19:17,173 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 174 transitions. Word has length 166 [2020-10-12 16:19:17,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:19:17,173 INFO L479 AbstractCegarLoop]: Abstraction has 171 states and 174 transitions. [2020-10-12 16:19:17,174 INFO L480 AbstractCegarLoop]: Interpolant automaton has 79 states. [2020-10-12 16:19:17,174 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 174 transitions. [2020-10-12 16:19:17,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2020-10-12 16:19:17,175 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:19:17,175 INFO L422 BasicCegarLoop]: trace histogram [78, 77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:19:17,175 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2020-10-12 16:19:17,175 INFO L427 AbstractCegarLoop]: === Iteration 79 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:19:17,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:19:17,175 INFO L82 PathProgramCache]: Analyzing trace with hash 898237344, now seen corresponding path program 77 times [2020-10-12 16:19:17,176 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:19:17,176 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1033295210] [2020-10-12 16:19:17,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:19:17,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:17,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:17,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:18,864 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:18,865 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 176 [2020-10-12 16:19:18,865 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:19:18,865 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1674 [2020-10-12 16:19:18,865 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:18,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 79 [2020-10-12 16:19:18,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:19:18,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 157 [2020-10-12 16:19:18,865 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:22,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:19:22,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:22,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:22,414 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:22,414 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:19:22,414 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:19:22,415 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:19:22,415 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:22,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:19:22,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:19:22,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:19:22,415 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:22,434 INFO L134 CoverageAnalysis]: Checked inductivity of 6084 backedges. 78 proven. 6006 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:19:22,434 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1033295210] [2020-10-12 16:19:22,434 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:19:22,434 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [80] total 80 [2020-10-12 16:19:22,434 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5223360] [2020-10-12 16:19:22,435 INFO L459 AbstractCegarLoop]: Interpolant automaton has 80 states [2020-10-12 16:19:22,435 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:19:22,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2020-10-12 16:19:22,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2020-10-12 16:19:22,435 INFO L87 Difference]: Start difference. First operand 171 states and 174 transitions. Second operand 80 states. [2020-10-12 16:19:22,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:19:22,914 INFO L93 Difference]: Finished difference Result 185 states and 192 transitions. [2020-10-12 16:19:22,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2020-10-12 16:19:22,915 INFO L78 Accepts]: Start accepts. Automaton has 80 states. Word has length 168 [2020-10-12 16:19:22,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:19:22,916 INFO L225 Difference]: With dead ends: 185 [2020-10-12 16:19:22,916 INFO L226 Difference]: Without dead ends: 173 [2020-10-12 16:19:22,916 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2020-10-12 16:19:22,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-10-12 16:19:22,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2020-10-12 16:19:22,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2020-10-12 16:19:22,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 176 transitions. [2020-10-12 16:19:22,920 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 176 transitions. Word has length 168 [2020-10-12 16:19:22,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:19:22,920 INFO L479 AbstractCegarLoop]: Abstraction has 173 states and 176 transitions. [2020-10-12 16:19:22,920 INFO L480 AbstractCegarLoop]: Interpolant automaton has 80 states. [2020-10-12 16:19:22,920 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 176 transitions. [2020-10-12 16:19:22,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2020-10-12 16:19:22,921 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:19:22,921 INFO L422 BasicCegarLoop]: trace histogram [79, 78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:19:22,921 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2020-10-12 16:19:22,921 INFO L427 AbstractCegarLoop]: === Iteration 80 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:19:22,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:19:22,922 INFO L82 PathProgramCache]: Analyzing trace with hash -2117647715, now seen corresponding path program 78 times [2020-10-12 16:19:22,922 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:19:22,922 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1789573052] [2020-10-12 16:19:22,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:19:22,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:22,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:23,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:24,667 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:24,667 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 178 [2020-10-12 16:19:24,667 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:19:24,667 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1725 [2020-10-12 16:19:24,667 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:24,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 80 [2020-10-12 16:19:24,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:19:24,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 159 [2020-10-12 16:19:24,668 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:28,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:19:28,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:28,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:28,327 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:28,327 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:19:28,327 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:19:28,328 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:19:28,328 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:28,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:19:28,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:19:28,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:19:28,328 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:28,347 INFO L134 CoverageAnalysis]: Checked inductivity of 6241 backedges. 79 proven. 6162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:19:28,347 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1789573052] [2020-10-12 16:19:28,347 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:19:28,347 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [81] total 81 [2020-10-12 16:19:28,347 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972816150] [2020-10-12 16:19:28,348 INFO L459 AbstractCegarLoop]: Interpolant automaton has 81 states [2020-10-12 16:19:28,348 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:19:28,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2020-10-12 16:19:28,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2020-10-12 16:19:28,349 INFO L87 Difference]: Start difference. First operand 173 states and 176 transitions. Second operand 81 states. [2020-10-12 16:19:28,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:19:28,832 INFO L93 Difference]: Finished difference Result 187 states and 194 transitions. [2020-10-12 16:19:28,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2020-10-12 16:19:28,832 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 170 [2020-10-12 16:19:28,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:19:28,834 INFO L225 Difference]: With dead ends: 187 [2020-10-12 16:19:28,834 INFO L226 Difference]: Without dead ends: 175 [2020-10-12 16:19:28,834 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2020-10-12 16:19:28,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-10-12 16:19:28,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2020-10-12 16:19:28,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2020-10-12 16:19:28,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 178 transitions. [2020-10-12 16:19:28,837 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 178 transitions. Word has length 170 [2020-10-12 16:19:28,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:19:28,838 INFO L479 AbstractCegarLoop]: Abstraction has 175 states and 178 transitions. [2020-10-12 16:19:28,838 INFO L480 AbstractCegarLoop]: Interpolant automaton has 81 states. [2020-10-12 16:19:28,838 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 178 transitions. [2020-10-12 16:19:28,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2020-10-12 16:19:28,839 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:19:28,839 INFO L422 BasicCegarLoop]: trace histogram [80, 79, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:19:28,839 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2020-10-12 16:19:28,839 INFO L427 AbstractCegarLoop]: === Iteration 81 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:19:28,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:19:28,840 INFO L82 PathProgramCache]: Analyzing trace with hash -1280264614, now seen corresponding path program 79 times [2020-10-12 16:19:28,840 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:19:28,840 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [314370756] [2020-10-12 16:19:28,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:19:28,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:28,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:28,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:30,621 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:30,621 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 180 [2020-10-12 16:19:30,622 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:19:30,622 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1762 [2020-10-12 16:19:30,622 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:30,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 81 [2020-10-12 16:19:30,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:19:30,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 161 [2020-10-12 16:19:30,622 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:34,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:19:34,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:34,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:34,402 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:34,402 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:19:34,402 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:19:34,402 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:19:34,402 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:34,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:19:34,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:19:34,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:19:34,403 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:34,421 INFO L134 CoverageAnalysis]: Checked inductivity of 6400 backedges. 80 proven. 6320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:19:34,421 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [314370756] [2020-10-12 16:19:34,421 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:19:34,421 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [82] total 82 [2020-10-12 16:19:34,421 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028988487] [2020-10-12 16:19:34,422 INFO L459 AbstractCegarLoop]: Interpolant automaton has 82 states [2020-10-12 16:19:34,422 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:19:34,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2020-10-12 16:19:34,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2020-10-12 16:19:34,422 INFO L87 Difference]: Start difference. First operand 175 states and 178 transitions. Second operand 82 states. [2020-10-12 16:19:34,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:19:34,847 INFO L93 Difference]: Finished difference Result 189 states and 196 transitions. [2020-10-12 16:19:34,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2020-10-12 16:19:34,848 INFO L78 Accepts]: Start accepts. Automaton has 82 states. Word has length 172 [2020-10-12 16:19:34,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:19:34,849 INFO L225 Difference]: With dead ends: 189 [2020-10-12 16:19:34,849 INFO L226 Difference]: Without dead ends: 177 [2020-10-12 16:19:34,850 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2020-10-12 16:19:34,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-10-12 16:19:34,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 177. [2020-10-12 16:19:34,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-10-12 16:19:34,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 180 transitions. [2020-10-12 16:19:34,854 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 180 transitions. Word has length 172 [2020-10-12 16:19:34,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:19:34,854 INFO L479 AbstractCegarLoop]: Abstraction has 177 states and 180 transitions. [2020-10-12 16:19:34,854 INFO L480 AbstractCegarLoop]: Interpolant automaton has 82 states. [2020-10-12 16:19:34,854 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 180 transitions. [2020-10-12 16:19:34,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2020-10-12 16:19:34,855 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:19:34,855 INFO L422 BasicCegarLoop]: trace histogram [81, 80, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:19:34,855 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2020-10-12 16:19:34,855 INFO L427 AbstractCegarLoop]: === Iteration 82 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:19:34,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:19:34,855 INFO L82 PathProgramCache]: Analyzing trace with hash 286011095, now seen corresponding path program 80 times [2020-10-12 16:19:34,856 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:19:34,856 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1278327053] [2020-10-12 16:19:34,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:19:34,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:34,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:34,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:36,673 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:36,673 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 182 [2020-10-12 16:19:36,673 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:19:36,674 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1805 [2020-10-12 16:19:36,674 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:36,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 82 [2020-10-12 16:19:36,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:19:36,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 163 [2020-10-12 16:19:36,674 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:40,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:19:40,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:40,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:40,569 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:40,569 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:19:40,569 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:19:40,569 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:19:40,569 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:40,569 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:19:40,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:19:40,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:19:40,570 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:40,589 INFO L134 CoverageAnalysis]: Checked inductivity of 6561 backedges. 81 proven. 6480 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:19:40,590 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1278327053] [2020-10-12 16:19:40,590 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:19:40,590 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [83] total 83 [2020-10-12 16:19:40,590 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045943681] [2020-10-12 16:19:40,590 INFO L459 AbstractCegarLoop]: Interpolant automaton has 83 states [2020-10-12 16:19:40,590 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:19:40,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2020-10-12 16:19:40,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2020-10-12 16:19:40,591 INFO L87 Difference]: Start difference. First operand 177 states and 180 transitions. Second operand 83 states. [2020-10-12 16:19:41,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:19:41,005 INFO L93 Difference]: Finished difference Result 191 states and 198 transitions. [2020-10-12 16:19:41,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2020-10-12 16:19:41,006 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 174 [2020-10-12 16:19:41,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:19:41,007 INFO L225 Difference]: With dead ends: 191 [2020-10-12 16:19:41,007 INFO L226 Difference]: Without dead ends: 179 [2020-10-12 16:19:41,008 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2020-10-12 16:19:41,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-10-12 16:19:41,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 179. [2020-10-12 16:19:41,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2020-10-12 16:19:41,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 182 transitions. [2020-10-12 16:19:41,013 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 182 transitions. Word has length 174 [2020-10-12 16:19:41,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:19:41,014 INFO L479 AbstractCegarLoop]: Abstraction has 179 states and 182 transitions. [2020-10-12 16:19:41,014 INFO L480 AbstractCegarLoop]: Interpolant automaton has 83 states. [2020-10-12 16:19:41,014 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 182 transitions. [2020-10-12 16:19:41,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2020-10-12 16:19:41,015 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:19:41,015 INFO L422 BasicCegarLoop]: trace histogram [82, 81, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:19:41,015 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2020-10-12 16:19:41,015 INFO L427 AbstractCegarLoop]: === Iteration 83 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:19:41,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:19:41,016 INFO L82 PathProgramCache]: Analyzing trace with hash -2056553452, now seen corresponding path program 81 times [2020-10-12 16:19:41,016 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:19:41,016 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1038426314] [2020-10-12 16:19:41,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:19:41,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:41,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:41,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:42,998 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:42,999 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 184 [2020-10-12 16:19:42,999 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:19:42,999 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1962 [2020-10-12 16:19:42,999 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:42,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 83 [2020-10-12 16:19:42,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:19:42,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 165 [2020-10-12 16:19:42,999 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:46,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:19:46,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:46,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:46,968 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:46,968 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:19:46,968 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:19:46,969 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:19:46,969 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:46,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:19:46,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:19:46,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:19:46,969 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:46,990 INFO L134 CoverageAnalysis]: Checked inductivity of 6724 backedges. 82 proven. 6642 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:19:46,990 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1038426314] [2020-10-12 16:19:46,990 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:19:46,991 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [84] total 84 [2020-10-12 16:19:46,991 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302060715] [2020-10-12 16:19:46,991 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2020-10-12 16:19:46,991 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:19:46,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2020-10-12 16:19:46,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2020-10-12 16:19:46,992 INFO L87 Difference]: Start difference. First operand 179 states and 182 transitions. Second operand 84 states. [2020-10-12 16:19:47,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:19:47,445 INFO L93 Difference]: Finished difference Result 193 states and 200 transitions. [2020-10-12 16:19:47,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2020-10-12 16:19:47,446 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 176 [2020-10-12 16:19:47,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:19:47,448 INFO L225 Difference]: With dead ends: 193 [2020-10-12 16:19:47,448 INFO L226 Difference]: Without dead ends: 181 [2020-10-12 16:19:47,449 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2020-10-12 16:19:47,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2020-10-12 16:19:47,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2020-10-12 16:19:47,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2020-10-12 16:19:47,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 184 transitions. [2020-10-12 16:19:47,453 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 184 transitions. Word has length 176 [2020-10-12 16:19:47,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:19:47,454 INFO L479 AbstractCegarLoop]: Abstraction has 181 states and 184 transitions. [2020-10-12 16:19:47,454 INFO L480 AbstractCegarLoop]: Interpolant automaton has 84 states. [2020-10-12 16:19:47,454 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 184 transitions. [2020-10-12 16:19:47,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2020-10-12 16:19:47,455 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:19:47,455 INFO L422 BasicCegarLoop]: trace histogram [83, 82, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:19:47,455 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2020-10-12 16:19:47,455 INFO L427 AbstractCegarLoop]: === Iteration 84 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:19:47,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:19:47,455 INFO L82 PathProgramCache]: Analyzing trace with hash 1596747281, now seen corresponding path program 82 times [2020-10-12 16:19:47,456 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:19:47,456 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1434561437] [2020-10-12 16:19:47,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:19:47,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:47,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:47,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:49,454 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:49,454 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 186 [2020-10-12 16:19:49,454 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:19:49,454 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1980 [2020-10-12 16:19:49,455 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:49,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 84 [2020-10-12 16:19:49,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:19:49,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 167 [2020-10-12 16:19:49,455 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:53,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:19:53,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:53,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:53,608 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:53,608 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:19:53,609 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:19:53,609 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 16:19:53,609 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:53,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:19:53,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:19:53,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:19:53,610 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:19:53,631 INFO L134 CoverageAnalysis]: Checked inductivity of 6889 backedges. 83 proven. 6806 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:19:53,631 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1434561437] [2020-10-12 16:19:53,631 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:19:53,632 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [85] total 85 [2020-10-12 16:19:53,632 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647539874] [2020-10-12 16:19:53,632 INFO L459 AbstractCegarLoop]: Interpolant automaton has 85 states [2020-10-12 16:19:53,632 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:19:53,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2020-10-12 16:19:53,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2020-10-12 16:19:53,633 INFO L87 Difference]: Start difference. First operand 181 states and 184 transitions. Second operand 85 states. [2020-10-12 16:19:54,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:19:54,064 INFO L93 Difference]: Finished difference Result 195 states and 202 transitions. [2020-10-12 16:19:54,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2020-10-12 16:19:54,065 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 178 [2020-10-12 16:19:54,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:19:54,066 INFO L225 Difference]: With dead ends: 195 [2020-10-12 16:19:54,066 INFO L226 Difference]: Without dead ends: 183 [2020-10-12 16:19:54,067 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2020-10-12 16:19:54,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-10-12 16:19:54,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 183. [2020-10-12 16:19:54,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2020-10-12 16:19:54,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 186 transitions. [2020-10-12 16:19:54,071 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 186 transitions. Word has length 178 [2020-10-12 16:19:54,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:19:54,072 INFO L479 AbstractCegarLoop]: Abstraction has 183 states and 186 transitions. [2020-10-12 16:19:54,072 INFO L480 AbstractCegarLoop]: Interpolant automaton has 85 states. [2020-10-12 16:19:54,072 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 186 transitions. [2020-10-12 16:19:54,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2020-10-12 16:19:54,073 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:19:54,073 INFO L422 BasicCegarLoop]: trace histogram [84, 83, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:19:54,073 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2020-10-12 16:19:54,074 INFO L427 AbstractCegarLoop]: === Iteration 85 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:19:54,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:19:54,074 INFO L82 PathProgramCache]: Analyzing trace with hash -864496434, now seen corresponding path program 83 times [2020-10-12 16:19:54,074 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:19:54,074 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1441465133] [2020-10-12 16:19:54,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:19:54,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:19:54,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:54,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:19:56,119 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:19:56,119 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 188 [2020-10-12 16:19:56,119 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:19:56,120 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2024 [2020-10-12 16:19:56,120 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:19:56,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 85 [2020-10-12 16:19:56,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:19:56,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 169 [2020-10-12 16:19:56,120 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:20:00,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:20:00,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:20:00,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:00,391 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:20:00,391 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:20:00,391 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:20:00,391 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:20:00,392 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:20:00,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:20:00,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:20:00,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:20:00,392 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:20:00,413 INFO L134 CoverageAnalysis]: Checked inductivity of 7056 backedges. 84 proven. 6972 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:20:00,413 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1441465133] [2020-10-12 16:20:00,413 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:20:00,414 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [86] total 86 [2020-10-12 16:20:00,414 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249483720] [2020-10-12 16:20:00,414 INFO L459 AbstractCegarLoop]: Interpolant automaton has 86 states [2020-10-12 16:20:00,414 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:20:00,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2020-10-12 16:20:00,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2020-10-12 16:20:00,415 INFO L87 Difference]: Start difference. First operand 183 states and 186 transitions. Second operand 86 states. [2020-10-12 16:20:00,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:20:00,916 INFO L93 Difference]: Finished difference Result 197 states and 204 transitions. [2020-10-12 16:20:00,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2020-10-12 16:20:00,917 INFO L78 Accepts]: Start accepts. Automaton has 86 states. Word has length 180 [2020-10-12 16:20:00,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:20:00,919 INFO L225 Difference]: With dead ends: 197 [2020-10-12 16:20:00,919 INFO L226 Difference]: Without dead ends: 185 [2020-10-12 16:20:00,919 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2020-10-12 16:20:00,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-10-12 16:20:00,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2020-10-12 16:20:00,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2020-10-12 16:20:00,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 188 transitions. [2020-10-12 16:20:00,924 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 188 transitions. Word has length 180 [2020-10-12 16:20:00,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:20:00,924 INFO L479 AbstractCegarLoop]: Abstraction has 185 states and 188 transitions. [2020-10-12 16:20:00,924 INFO L480 AbstractCegarLoop]: Interpolant automaton has 86 states. [2020-10-12 16:20:00,924 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 188 transitions. [2020-10-12 16:20:00,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2020-10-12 16:20:00,925 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:20:00,926 INFO L422 BasicCegarLoop]: trace histogram [85, 84, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:20:00,926 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2020-10-12 16:20:00,926 INFO L427 AbstractCegarLoop]: === Iteration 86 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:20:00,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:20:00,926 INFO L82 PathProgramCache]: Analyzing trace with hash 407273547, now seen corresponding path program 84 times [2020-10-12 16:20:00,926 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:20:00,927 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1792919010] [2020-10-12 16:20:00,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:20:00,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:20:00,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:01,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:02,998 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:20:02,998 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 190 [2020-10-12 16:20:02,998 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:20:02,998 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2054 [2020-10-12 16:20:02,998 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:20:02,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 86 [2020-10-12 16:20:02,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:20:02,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 171 [2020-10-12 16:20:02,999 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:20:07,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:20:07,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:20:07,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:07,401 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:20:07,401 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:20:07,401 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:20:07,401 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:20:07,401 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:20:07,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:20:07,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:20:07,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:20:07,402 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:20:07,422 INFO L134 CoverageAnalysis]: Checked inductivity of 7225 backedges. 85 proven. 7140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:20:07,422 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1792919010] [2020-10-12 16:20:07,422 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:20:07,422 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [87] total 87 [2020-10-12 16:20:07,422 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270194771] [2020-10-12 16:20:07,423 INFO L459 AbstractCegarLoop]: Interpolant automaton has 87 states [2020-10-12 16:20:07,423 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:20:07,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2020-10-12 16:20:07,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2020-10-12 16:20:07,424 INFO L87 Difference]: Start difference. First operand 185 states and 188 transitions. Second operand 87 states. [2020-10-12 16:20:08,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:20:08,000 INFO L93 Difference]: Finished difference Result 199 states and 206 transitions. [2020-10-12 16:20:08,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2020-10-12 16:20:08,001 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 182 [2020-10-12 16:20:08,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:20:08,003 INFO L225 Difference]: With dead ends: 199 [2020-10-12 16:20:08,003 INFO L226 Difference]: Without dead ends: 187 [2020-10-12 16:20:08,003 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2020-10-12 16:20:08,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-10-12 16:20:08,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 187. [2020-10-12 16:20:08,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2020-10-12 16:20:08,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 190 transitions. [2020-10-12 16:20:08,007 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 190 transitions. Word has length 182 [2020-10-12 16:20:08,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:20:08,008 INFO L479 AbstractCegarLoop]: Abstraction has 187 states and 190 transitions. [2020-10-12 16:20:08,008 INFO L480 AbstractCegarLoop]: Interpolant automaton has 87 states. [2020-10-12 16:20:08,008 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 190 transitions. [2020-10-12 16:20:08,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2020-10-12 16:20:08,009 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:20:08,009 INFO L422 BasicCegarLoop]: trace histogram [86, 85, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:20:08,009 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2020-10-12 16:20:08,009 INFO L427 AbstractCegarLoop]: === Iteration 87 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:20:08,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:20:08,009 INFO L82 PathProgramCache]: Analyzing trace with hash -1487454072, now seen corresponding path program 85 times [2020-10-12 16:20:08,009 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:20:08,010 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [425061109] [2020-10-12 16:20:08,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:20:08,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:20:08,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:08,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:10,083 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:20:10,084 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 192 [2020-10-12 16:20:10,084 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:20:10,084 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2061 [2020-10-12 16:20:10,084 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:20:10,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 87 [2020-10-12 16:20:10,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:20:10,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 173 [2020-10-12 16:20:10,084 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:20:14,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:20:14,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:20:14,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:14,642 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:20:14,642 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:20:14,643 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:20:14,643 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:20:14,643 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:20:14,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:20:14,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:20:14,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:20:14,643 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:20:14,664 INFO L134 CoverageAnalysis]: Checked inductivity of 7396 backedges. 86 proven. 7310 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:20:14,664 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [425061109] [2020-10-12 16:20:14,664 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:20:14,664 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [88] total 88 [2020-10-12 16:20:14,664 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61802825] [2020-10-12 16:20:14,665 INFO L459 AbstractCegarLoop]: Interpolant automaton has 88 states [2020-10-12 16:20:14,665 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:20:14,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2020-10-12 16:20:14,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2020-10-12 16:20:14,666 INFO L87 Difference]: Start difference. First operand 187 states and 190 transitions. Second operand 88 states. [2020-10-12 16:20:15,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:20:15,223 INFO L93 Difference]: Finished difference Result 201 states and 208 transitions. [2020-10-12 16:20:15,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2020-10-12 16:20:15,224 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 184 [2020-10-12 16:20:15,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:20:15,226 INFO L225 Difference]: With dead ends: 201 [2020-10-12 16:20:15,226 INFO L226 Difference]: Without dead ends: 189 [2020-10-12 16:20:15,226 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2020-10-12 16:20:15,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2020-10-12 16:20:15,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 189. [2020-10-12 16:20:15,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2020-10-12 16:20:15,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 192 transitions. [2020-10-12 16:20:15,231 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 192 transitions. Word has length 184 [2020-10-12 16:20:15,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:20:15,231 INFO L479 AbstractCegarLoop]: Abstraction has 189 states and 192 transitions. [2020-10-12 16:20:15,231 INFO L480 AbstractCegarLoop]: Interpolant automaton has 88 states. [2020-10-12 16:20:15,231 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 192 transitions. [2020-10-12 16:20:15,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2020-10-12 16:20:15,232 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:20:15,232 INFO L422 BasicCegarLoop]: trace histogram [87, 86, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:20:15,232 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2020-10-12 16:20:15,232 INFO L427 AbstractCegarLoop]: === Iteration 88 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:20:15,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:20:15,232 INFO L82 PathProgramCache]: Analyzing trace with hash -1254562427, now seen corresponding path program 86 times [2020-10-12 16:20:15,232 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:20:15,233 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1177062795] [2020-10-12 16:20:15,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:20:15,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:20:15,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:15,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:17,399 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:20:17,399 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 194 [2020-10-12 16:20:17,399 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:20:17,399 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2153 [2020-10-12 16:20:17,399 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:20:17,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 88 [2020-10-12 16:20:17,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:20:17,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 175 [2020-10-12 16:20:17,400 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:20:22,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:20:22,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:20:22,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:22,063 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:20:22,063 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:20:22,063 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:20:22,063 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:20:22,063 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:20:22,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:20:22,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:20:22,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:20:22,064 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:20:22,084 INFO L134 CoverageAnalysis]: Checked inductivity of 7569 backedges. 87 proven. 7482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:20:22,085 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1177062795] [2020-10-12 16:20:22,085 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:20:22,085 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [89] total 89 [2020-10-12 16:20:22,085 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367424481] [2020-10-12 16:20:22,085 INFO L459 AbstractCegarLoop]: Interpolant automaton has 89 states [2020-10-12 16:20:22,085 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:20:22,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2020-10-12 16:20:22,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2020-10-12 16:20:22,086 INFO L87 Difference]: Start difference. First operand 189 states and 192 transitions. Second operand 89 states. [2020-10-12 16:20:22,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:20:22,464 INFO L93 Difference]: Finished difference Result 203 states and 210 transitions. [2020-10-12 16:20:22,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2020-10-12 16:20:22,464 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 186 [2020-10-12 16:20:22,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:20:22,466 INFO L225 Difference]: With dead ends: 203 [2020-10-12 16:20:22,466 INFO L226 Difference]: Without dead ends: 191 [2020-10-12 16:20:22,467 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2020-10-12 16:20:22,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2020-10-12 16:20:22,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2020-10-12 16:20:22,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2020-10-12 16:20:22,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 194 transitions. [2020-10-12 16:20:22,471 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 194 transitions. Word has length 186 [2020-10-12 16:20:22,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:20:22,471 INFO L479 AbstractCegarLoop]: Abstraction has 191 states and 194 transitions. [2020-10-12 16:20:22,471 INFO L480 AbstractCegarLoop]: Interpolant automaton has 89 states. [2020-10-12 16:20:22,471 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 194 transitions. [2020-10-12 16:20:22,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2020-10-12 16:20:22,472 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:20:22,472 INFO L422 BasicCegarLoop]: trace histogram [88, 87, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:20:22,473 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2020-10-12 16:20:22,473 INFO L427 AbstractCegarLoop]: === Iteration 89 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:20:22,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:20:22,473 INFO L82 PathProgramCache]: Analyzing trace with hash -783990974, now seen corresponding path program 87 times [2020-10-12 16:20:22,473 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:20:22,473 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [127796219] [2020-10-12 16:20:22,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:20:22,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:20:22,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:22,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:24,911 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:20:24,911 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 196 [2020-10-12 16:20:24,911 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:20:24,911 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2416 [2020-10-12 16:20:24,911 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:20:24,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 89 [2020-10-12 16:20:24,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:20:24,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 177 [2020-10-12 16:20:24,912 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:20:29,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 16:20:29,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:20:29,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:29,690 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:20:29,691 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 7 [2020-10-12 16:20:29,691 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 16:20:29,691 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-12 16:20:29,691 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:20:29,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 16:20:29,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 16:20:29,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 16:20:29,692 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 16:20:29,718 INFO L134 CoverageAnalysis]: Checked inductivity of 7744 backedges. 88 proven. 7656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 16:20:29,718 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [127796219] [2020-10-12 16:20:29,718 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 16:20:29,719 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [90] total 90 [2020-10-12 16:20:29,719 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961592777] [2020-10-12 16:20:29,719 INFO L459 AbstractCegarLoop]: Interpolant automaton has 90 states [2020-10-12 16:20:29,719 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 16:20:29,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2020-10-12 16:20:29,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2020-10-12 16:20:29,720 INFO L87 Difference]: Start difference. First operand 191 states and 194 transitions. Second operand 90 states. [2020-10-12 16:20:30,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 16:20:30,234 INFO L93 Difference]: Finished difference Result 205 states and 212 transitions. [2020-10-12 16:20:30,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2020-10-12 16:20:30,235 INFO L78 Accepts]: Start accepts. Automaton has 90 states. Word has length 188 [2020-10-12 16:20:30,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 16:20:30,237 INFO L225 Difference]: With dead ends: 205 [2020-10-12 16:20:30,237 INFO L226 Difference]: Without dead ends: 193 [2020-10-12 16:20:30,238 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2020-10-12 16:20:30,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-10-12 16:20:30,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 193. [2020-10-12 16:20:30,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2020-10-12 16:20:30,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 196 transitions. [2020-10-12 16:20:30,242 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 196 transitions. Word has length 188 [2020-10-12 16:20:30,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 16:20:30,243 INFO L479 AbstractCegarLoop]: Abstraction has 193 states and 196 transitions. [2020-10-12 16:20:30,243 INFO L480 AbstractCegarLoop]: Interpolant automaton has 90 states. [2020-10-12 16:20:30,243 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 196 transitions. [2020-10-12 16:20:30,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2020-10-12 16:20:30,244 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 16:20:30,244 INFO L422 BasicCegarLoop]: trace histogram [89, 88, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 16:20:30,244 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2020-10-12 16:20:30,245 INFO L427 AbstractCegarLoop]: === Iteration 90 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 16:20:30,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 16:20:30,245 INFO L82 PathProgramCache]: Analyzing trace with hash 463609279, now seen corresponding path program 88 times [2020-10-12 16:20:30,245 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 16:20:30,245 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1232486032] [2020-10-12 16:20:30,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 16:20:30,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 16:20:30,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:30,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 16:20:32,725 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 16:20:32,725 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 198 [2020-10-12 16:20:32,725 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 16:20:32,725 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2459 [2020-10-12 16:20:32,725 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 16:20:32,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 90 [2020-10-12 16:20:32,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-12 16:20:32,725 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 179 [2020-10-12 16:20:32,726 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0