/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=NARROWEST --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/eureka_01-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 11:06:58,982 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 11:06:58,985 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 11:06:59,008 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 11:06:59,009 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 11:06:59,010 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 11:06:59,011 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 11:06:59,013 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 11:06:59,015 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 11:06:59,015 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 11:06:59,016 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 11:06:59,017 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 11:06:59,018 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 11:06:59,019 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 11:06:59,020 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 11:06:59,021 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 11:06:59,022 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 11:06:59,022 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 11:06:59,024 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 11:06:59,026 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 11:06:59,027 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 11:06:59,028 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 11:06:59,029 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 11:06:59,030 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 11:06:59,033 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 11:06:59,033 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 11:06:59,033 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 11:06:59,034 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 11:06:59,034 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 11:06:59,035 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 11:06:59,035 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 11:06:59,036 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 11:06:59,037 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 11:06:59,038 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 11:06:59,039 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 11:06:59,039 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 11:06:59,040 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 11:06:59,040 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 11:06:59,040 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 11:06:59,041 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 11:06:59,042 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 11:06:59,043 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 [2020-10-13 11:06:59,065 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 11:06:59,065 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 11:06:59,066 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 11:06:59,066 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 11:06:59,067 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 11:06:59,067 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 11:06:59,067 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 11:06:59,067 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 11:06:59,068 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 11:06:59,068 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 11:06:59,068 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 11:06:59,068 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 11:06:59,068 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 11:06:59,069 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 11:06:59,069 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 11:06:59,069 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 11:06:59,069 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 11:06:59,069 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 11:06:59,070 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 11:06:59,070 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 11:06:59,070 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 11:06:59,070 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 11:06:59,070 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 11:06:59,071 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 11:06:59,071 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 11:06:59,071 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 11:06:59,071 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 11:06:59,072 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 11:06:59,072 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 11:06:59,072 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=NARROWEST;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=NARROWEST;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=NARROWEST;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=NARROWEST;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=NARROWEST;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=NARROWEST;log-additional-information=true;unknown-allowed=true; [2020-10-13 11:06:59,376 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 11:06:59,390 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 11:06:59,396 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 11:06:59,400 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 11:06:59,401 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 11:06:59,402 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/eureka_01-2.c [2020-10-13 11:06:59,486 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0f4c9d4d7/804d71b6579c4714a8380513201e7f70/FLAGf2eff7dfc [2020-10-13 11:06:59,986 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 11:06:59,986 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loops/eureka_01-2.c [2020-10-13 11:06:59,992 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0f4c9d4d7/804d71b6579c4714a8380513201e7f70/FLAGf2eff7dfc [2020-10-13 11:07:00,344 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0f4c9d4d7/804d71b6579c4714a8380513201e7f70 [2020-10-13 11:07:00,352 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 11:07:00,354 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 11:07:00,355 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 11:07:00,355 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 11:07:00,359 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 11:07:00,360 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:07:00" (1/1) ... [2020-10-13 11:07:00,363 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f80c2a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:07:00, skipping insertion in model container [2020-10-13 11:07:00,363 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 11:07:00" (1/1) ... [2020-10-13 11:07:00,371 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 11:07:00,394 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 11:07:00,587 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 11:07:00,597 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 11:07:00,751 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 11:07:00,774 INFO L208 MainTranslator]: Completed translation [2020-10-13 11:07:00,774 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:07:00 WrapperNode [2020-10-13 11:07:00,775 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 11:07:00,775 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 11:07:00,776 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 11:07:00,776 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 11:07:00,789 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:07:00" (1/1) ... [2020-10-13 11:07:00,789 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:07:00" (1/1) ... [2020-10-13 11:07:00,802 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:07:00" (1/1) ... [2020-10-13 11:07:00,803 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:07:00" (1/1) ... [2020-10-13 11:07:00,819 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:07:00" (1/1) ... [2020-10-13 11:07:00,826 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:07:00" (1/1) ... [2020-10-13 11:07:00,834 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:07:00" (1/1) ... [2020-10-13 11:07:00,838 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 11:07:00,839 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 11:07:00,839 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 11:07:00,839 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 11:07:00,840 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:07:00" (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 [2020-10-13 11:07:00,913 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 11:07:00,914 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 11:07:00,914 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-13 11:07:00,914 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 11:07:00,914 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 11:07:00,914 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-13 11:07:00,915 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 11:07:00,915 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-13 11:07:00,915 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-13 11:07:00,915 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-13 11:07:00,915 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-13 11:07:00,915 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-13 11:07:00,916 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 11:07:00,916 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 11:07:01,326 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 11:07:01,326 INFO L295 CfgBuilder]: Removed 5 assume(true) statements. [2020-10-13 11:07:01,330 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:07:01 BoogieIcfgContainer [2020-10-13 11:07:01,330 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 11:07:01,332 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 11:07:01,332 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 11:07:01,335 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 11:07:01,335 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 11:07:00" (1/3) ... [2020-10-13 11:07:01,336 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a3919da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:07:01, skipping insertion in model container [2020-10-13 11:07:01,336 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 11:07:00" (2/3) ... [2020-10-13 11:07:01,337 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a3919da and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 11:07:01, skipping insertion in model container [2020-10-13 11:07:01,337 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 11:07:01" (3/3) ... [2020-10-13 11:07:01,339 INFO L109 eAbstractionObserver]: Analyzing ICFG eureka_01-2.c [2020-10-13 11:07:01,349 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 11:07:01,357 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 11:07:01,371 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 11:07:01,396 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 11:07:01,396 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 11:07:01,396 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 11:07:01,396 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 11:07:01,397 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 11:07:01,397 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 11:07:01,397 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 11:07:01,397 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 11:07:01,414 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states. [2020-10-13 11:07:01,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-13 11:07:01,420 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:07:01,421 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:07:01,421 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:07:01,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:07:01,427 INFO L82 PathProgramCache]: Analyzing trace with hash 288590464, now seen corresponding path program 1 times [2020-10-13 11:07:01,434 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:07:01,435 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [411756148] [2020-10-13 11:07:01,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:07:01,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:01,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:01,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:01,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:01,956 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:07:01,957 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-13 11:07:01,957 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 11:07:01,957 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 363 [2020-10-13 11:07:01,960 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:07:01,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:07:01,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-13 11:07:01,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:07:01,961 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-13 11:07:02,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:07:02,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:02,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:02,026 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:07:02,027 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 11:07:02,027 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:07:02,027 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 11:07:02,028 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:07:02,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:07:02,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:07:02,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:07:02,029 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 11:07:02,036 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 11:07:02,036 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [411756148] [2020-10-13 11:07:02,039 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 11:07:02,039 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 11:07:02,040 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833800170] [2020-10-13 11:07:02,045 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 11:07:02,045 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:07:02,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 11:07:02,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 11:07:02,062 INFO L87 Difference]: Start difference. First operand 35 states. Second operand 3 states. [2020-10-13 11:07:02,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:07:02,202 INFO L93 Difference]: Finished difference Result 61 states and 85 transitions. [2020-10-13 11:07:02,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 11:07:02,204 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-10-13 11:07:02,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:07:02,213 INFO L225 Difference]: With dead ends: 61 [2020-10-13 11:07:02,213 INFO L226 Difference]: Without dead ends: 30 [2020-10-13 11:07:02,217 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 11:07:02,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-13 11:07:02,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-10-13 11:07:02,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-13 11:07:02,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2020-10-13 11:07:02,255 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 17 [2020-10-13 11:07:02,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:07:02,255 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2020-10-13 11:07:02,256 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 11:07:02,256 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2020-10-13 11:07:02,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-13 11:07:02,257 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:07:02,257 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:07:02,258 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 11:07:02,258 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:07:02,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:07:02,259 INFO L82 PathProgramCache]: Analyzing trace with hash 1211863700, now seen corresponding path program 1 times [2020-10-13 11:07:02,259 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:07:02,259 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [775578846] [2020-10-13 11:07:02,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:07:02,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:02,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:02,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:02,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:02,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:02,843 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:07:02,844 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-13 11:07:02,844 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 11:07:02,844 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 563 [2020-10-13 11:07:02,844 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:07:02,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 11:07:02,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 11:07:02,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 11:07:02,846 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 11:07:02,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:07:02,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:02,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:02,886 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:07:02,887 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 11:07:02,887 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:07:02,887 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 11:07:02,887 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:07:02,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:07:02,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:07:02,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:07:02,888 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 11:07:02,892 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 11:07:02,892 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [775578846] [2020-10-13 11:07:02,893 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 11:07:02,893 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 11:07:02,893 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043894064] [2020-10-13 11:07:02,895 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 11:07:02,895 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:07:02,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 11:07:02,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 11:07:02,896 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand 4 states. [2020-10-13 11:07:02,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:07:02,994 INFO L93 Difference]: Finished difference Result 54 states and 66 transitions. [2020-10-13 11:07:02,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 11:07:02,995 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-10-13 11:07:02,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:07:02,997 INFO L225 Difference]: With dead ends: 54 [2020-10-13 11:07:02,997 INFO L226 Difference]: Without dead ends: 33 [2020-10-13 11:07:02,998 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 11:07:02,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-13 11:07:03,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 31. [2020-10-13 11:07:03,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-13 11:07:03,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2020-10-13 11:07:03,006 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 17 [2020-10-13 11:07:03,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:07:03,006 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2020-10-13 11:07:03,006 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 11:07:03,007 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2020-10-13 11:07:03,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-13 11:07:03,008 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:07:03,008 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:07:03,008 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 11:07:03,008 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:07:03,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:07:03,009 INFO L82 PathProgramCache]: Analyzing trace with hash 151989727, now seen corresponding path program 1 times [2020-10-13 11:07:03,009 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:07:03,010 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1711699973] [2020-10-13 11:07:03,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:07:03,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:03,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:03,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:03,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:03,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:03,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:04,298 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:07:04,298 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-13 11:07:04,299 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 11:07:04,299 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1273 [2020-10-13 11:07:04,299 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:07:04,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 11:07:04,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 11:07:04,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-13 11:07:04,300 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:07:04,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:07:04,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:04,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:04,350 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:07:04,350 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 11:07:04,350 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:07:04,351 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 11:07:04,351 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:07:04,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:07:04,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:07:04,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:07:04,352 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:07:04,354 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 11:07:04,355 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1711699973] [2020-10-13 11:07:04,355 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:07:04,355 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 11:07:04,356 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427064516] [2020-10-13 11:07:04,356 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 11:07:04,356 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:07:04,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 11:07:04,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 11:07:04,357 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand 5 states. [2020-10-13 11:07:04,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:07:04,482 INFO L93 Difference]: Finished difference Result 57 states and 70 transitions. [2020-10-13 11:07:04,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 11:07:04,482 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 20 [2020-10-13 11:07:04,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:07:04,484 INFO L225 Difference]: With dead ends: 57 [2020-10-13 11:07:04,484 INFO L226 Difference]: Without dead ends: 36 [2020-10-13 11:07:04,485 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 11:07:04,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-13 11:07:04,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2020-10-13 11:07:04,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-13 11:07:04,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2020-10-13 11:07:04,492 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 20 [2020-10-13 11:07:04,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:07:04,492 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2020-10-13 11:07:04,492 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 11:07:04,492 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2020-10-13 11:07:04,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-13 11:07:04,493 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:07:04,493 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:07:04,494 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 11:07:04,494 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:07:04,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:07:04,494 INFO L82 PathProgramCache]: Analyzing trace with hash 2046020276, now seen corresponding path program 2 times [2020-10-13 11:07:04,495 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:07:04,495 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2136016133] [2020-10-13 11:07:04,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:07:04,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:04,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:04,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:04,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:04,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:04,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:04,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:04,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:05,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:06,985 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:07:06,985 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-13 11:07:06,986 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 11:07:06,986 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2477 [2020-10-13 11:07:06,986 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:07:06,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 11:07:06,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 11:07:06,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-13 11:07:06,987 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:07:07,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:07:07,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:07,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:07,029 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:07:07,030 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 11:07:07,030 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:07:07,031 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 11:07:07,031 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:07:07,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:07:07,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:07:07,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:07:07,032 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 11:07:07,036 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 11:07:07,037 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2136016133] [2020-10-13 11:07:07,037 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 11:07:07,038 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 11:07:07,043 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127338111] [2020-10-13 11:07:07,045 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 11:07:07,045 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:07:07,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 11:07:07,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 11:07:07,046 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand 5 states. [2020-10-13 11:07:07,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:07:07,201 INFO L93 Difference]: Finished difference Result 59 states and 72 transitions. [2020-10-13 11:07:07,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 11:07:07,202 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 23 [2020-10-13 11:07:07,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:07:07,203 INFO L225 Difference]: With dead ends: 59 [2020-10-13 11:07:07,203 INFO L226 Difference]: Without dead ends: 35 [2020-10-13 11:07:07,204 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 11:07:07,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-13 11:07:07,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2020-10-13 11:07:07,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-13 11:07:07,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2020-10-13 11:07:07,221 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 23 [2020-10-13 11:07:07,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:07:07,222 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2020-10-13 11:07:07,222 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 11:07:07,223 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2020-10-13 11:07:07,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-13 11:07:07,226 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:07:07,226 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:07:07,226 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 11:07:07,227 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:07:07,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:07:07,227 INFO L82 PathProgramCache]: Analyzing trace with hash 1459214262, now seen corresponding path program 1 times [2020-10-13 11:07:07,228 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:07:07,228 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [428310771] [2020-10-13 11:07:07,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:07:07,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:07,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:07,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:07,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:07,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:07,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:09,250 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:07:09,251 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-10-13 11:07:09,251 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 11:07:09,251 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2003 [2020-10-13 11:07:09,252 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:07:09,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 11:07:09,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-13 11:07:09,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 11:07:09,252 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:07:09,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:07:09,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:09,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:09,298 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:07:09,298 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 11:07:09,298 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:07:09,298 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 11:07:09,299 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:07:09,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:07:09,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:07:09,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:07:09,299 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:07:09,302 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-13 11:07:09,302 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [428310771] [2020-10-13 11:07:09,302 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 11:07:09,303 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-13 11:07:09,303 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678849848] [2020-10-13 11:07:09,303 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 11:07:09,304 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:07:09,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 11:07:09,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-13 11:07:09,304 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand 6 states. [2020-10-13 11:07:09,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:07:09,504 INFO L93 Difference]: Finished difference Result 67 states and 80 transitions. [2020-10-13 11:07:09,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 11:07:09,505 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2020-10-13 11:07:09,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:07:09,508 INFO L225 Difference]: With dead ends: 67 [2020-10-13 11:07:09,508 INFO L226 Difference]: Without dead ends: 47 [2020-10-13 11:07:09,509 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-13 11:07:09,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-13 11:07:09,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 35. [2020-10-13 11:07:09,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-13 11:07:09,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2020-10-13 11:07:09,519 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 23 [2020-10-13 11:07:09,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:07:09,520 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2020-10-13 11:07:09,520 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 11:07:09,520 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2020-10-13 11:07:09,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-13 11:07:09,521 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:07:09,521 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:07:09,521 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 11:07:09,521 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:07:09,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:07:09,522 INFO L82 PathProgramCache]: Analyzing trace with hash 1032611675, now seen corresponding path program 1 times [2020-10-13 11:07:09,522 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:07:09,522 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1830325468] [2020-10-13 11:07:09,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:07:09,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:09,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:09,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:09,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:09,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:10,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:11,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:13,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:14,076 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:07:14,076 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-13 11:07:14,077 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 11:07:14,077 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4541 [2020-10-13 11:07:14,077 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:07:14,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 11:07:14,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 11:07:14,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 11:07:14,081 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-13 11:07:14,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:07:14,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:14,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:14,129 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:07:14,129 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 11:07:14,129 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:07:14,129 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 11:07:14,130 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:07:14,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:07:14,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:07:14,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:07:14,131 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:07:14,134 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 11:07:14,134 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1830325468] [2020-10-13 11:07:14,137 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:07:14,138 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 11:07:14,138 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829473297] [2020-10-13 11:07:14,139 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 11:07:14,139 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:07:14,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 11:07:14,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 11:07:14,140 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand 6 states. [2020-10-13 11:07:14,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:07:14,276 INFO L93 Difference]: Finished difference Result 62 states and 73 transitions. [2020-10-13 11:07:14,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 11:07:14,277 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 26 [2020-10-13 11:07:14,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:07:14,278 INFO L225 Difference]: With dead ends: 62 [2020-10-13 11:07:14,278 INFO L226 Difference]: Without dead ends: 40 [2020-10-13 11:07:14,279 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 11:07:14,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-13 11:07:14,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 38. [2020-10-13 11:07:14,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-13 11:07:14,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 44 transitions. [2020-10-13 11:07:14,289 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 44 transitions. Word has length 26 [2020-10-13 11:07:14,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:07:14,289 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 44 transitions. [2020-10-13 11:07:14,290 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 11:07:14,290 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 44 transitions. [2020-10-13 11:07:14,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-13 11:07:14,291 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:07:14,291 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:07:14,292 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 11:07:14,292 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:07:14,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:07:14,292 INFO L82 PathProgramCache]: Analyzing trace with hash 1584403442, now seen corresponding path program 2 times [2020-10-13 11:07:14,292 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:07:14,293 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1735507230] [2020-10-13 11:07:14,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:07:14,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:14,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:14,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:14,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:14,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:14,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:15,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:16,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:19,319 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:07:19,319 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-13 11:07:19,319 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 11:07:19,320 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-13 11:07:19,320 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:07:19,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 11:07:19,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 11:07:19,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-13 11:07:19,321 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:07:19,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:07:19,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:19,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:19,404 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:07:19,404 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 11:07:19,404 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:07:19,405 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 11:07:19,405 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:07:19,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:07:19,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:07:19,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:07:19,406 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:07:19,409 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 11:07:19,409 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1735507230] [2020-10-13 11:07:19,410 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:07:19,410 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 11:07:19,410 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140764834] [2020-10-13 11:07:19,411 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 11:07:19,411 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:07:19,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 11:07:19,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 11:07:19,412 INFO L87 Difference]: Start difference. First operand 38 states and 44 transitions. Second operand 7 states. [2020-10-13 11:07:19,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:07:19,557 INFO L93 Difference]: Finished difference Result 65 states and 76 transitions. [2020-10-13 11:07:19,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 11:07:19,558 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 29 [2020-10-13 11:07:19,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:07:19,559 INFO L225 Difference]: With dead ends: 65 [2020-10-13 11:07:19,559 INFO L226 Difference]: Without dead ends: 43 [2020-10-13 11:07:19,560 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 11:07:19,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-13 11:07:19,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 41. [2020-10-13 11:07:19,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-13 11:07:19,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2020-10-13 11:07:19,569 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 29 [2020-10-13 11:07:19,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:07:19,570 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2020-10-13 11:07:19,570 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 11:07:19,570 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2020-10-13 11:07:19,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-13 11:07:19,574 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:07:19,575 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:07:19,575 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 11:07:19,576 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:07:19,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:07:19,577 INFO L82 PathProgramCache]: Analyzing trace with hash -1121874949, now seen corresponding path program 3 times [2020-10-13 11:07:19,577 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:07:19,577 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [107618283] [2020-10-13 11:07:19,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:07:19,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:19,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:19,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:19,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:19,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:20,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:20,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:20,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:20,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:21,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:24,593 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:07:24,593 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-13 11:07:24,594 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-13 11:07:24,594 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 11:07:24,594 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:07:24,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 11:07:24,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 11:07:24,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 11:07:24,595 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:07:24,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:07:24,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:24,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:24,685 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:07:24,686 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 11:07:24,686 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:07:24,686 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 11:07:24,686 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:07:24,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:07:24,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:07:24,687 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:07:24,687 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:07:24,691 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 11:07:24,692 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [107618283] [2020-10-13 11:07:24,692 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:07:24,692 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 11:07:24,692 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961589004] [2020-10-13 11:07:24,693 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 11:07:24,693 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:07:24,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 11:07:24,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 11:07:24,694 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand 8 states. [2020-10-13 11:07:24,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:07:24,872 INFO L93 Difference]: Finished difference Result 66 states and 77 transitions. [2020-10-13 11:07:24,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 11:07:24,873 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 32 [2020-10-13 11:07:24,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:07:24,873 INFO L225 Difference]: With dead ends: 66 [2020-10-13 11:07:24,874 INFO L226 Difference]: Without dead ends: 44 [2020-10-13 11:07:24,874 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 11:07:24,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-13 11:07:24,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-10-13 11:07:24,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-13 11:07:24,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 50 transitions. [2020-10-13 11:07:24,885 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 50 transitions. Word has length 32 [2020-10-13 11:07:24,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:07:24,885 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 50 transitions. [2020-10-13 11:07:24,885 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 11:07:24,885 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 50 transitions. [2020-10-13 11:07:24,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-13 11:07:24,886 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:07:24,886 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:07:24,886 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 11:07:24,887 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:07:24,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:07:24,889 INFO L82 PathProgramCache]: Analyzing trace with hash 1264659282, now seen corresponding path program 4 times [2020-10-13 11:07:24,889 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:07:24,889 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [490248648] [2020-10-13 11:07:24,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:07:24,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:24,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:24,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:24,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:25,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:25,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:25,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:25,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:25,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:26,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:26,837 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:07:26,837 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-13 11:07:26,837 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-13 11:07:26,837 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1935 [2020-10-13 11:07:26,838 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:07:26,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 11:07:26,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 11:07:26,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 11:07:26,838 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:07:26,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:07:26,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:26,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:26,872 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:07:26,872 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 11:07:26,872 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:07:26,872 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 11:07:26,873 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:07:26,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:07:26,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:07:26,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:07:26,873 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:07:26,876 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-10-13 11:07:26,876 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [490248648] [2020-10-13 11:07:26,877 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 11:07:26,877 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 11:07:26,877 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046174699] [2020-10-13 11:07:26,877 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 11:07:26,878 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:07:26,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 11:07:26,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 11:07:26,878 INFO L87 Difference]: Start difference. First operand 44 states and 50 transitions. Second operand 5 states. [2020-10-13 11:07:26,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:07:26,965 INFO L93 Difference]: Finished difference Result 67 states and 79 transitions. [2020-10-13 11:07:26,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 11:07:26,965 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 35 [2020-10-13 11:07:26,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:07:26,966 INFO L225 Difference]: With dead ends: 67 [2020-10-13 11:07:26,966 INFO L226 Difference]: Without dead ends: 47 [2020-10-13 11:07:26,967 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 11:07:26,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-13 11:07:26,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 45. [2020-10-13 11:07:26,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-13 11:07:26,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 51 transitions. [2020-10-13 11:07:26,972 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 51 transitions. Word has length 35 [2020-10-13 11:07:26,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:07:26,973 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 51 transitions. [2020-10-13 11:07:26,973 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 11:07:26,973 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 51 transitions. [2020-10-13 11:07:26,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-13 11:07:26,974 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:07:26,974 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:07:26,974 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 11:07:26,974 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:07:26,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:07:26,974 INFO L82 PathProgramCache]: Analyzing trace with hash -2066534906, now seen corresponding path program 1 times [2020-10-13 11:07:26,975 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:07:26,975 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [222119321] [2020-10-13 11:07:26,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:07:26,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:26,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:27,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:27,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:27,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:27,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:27,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:27,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:28,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:31,998 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:07:31,999 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-13 11:07:31,999 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 11:07:31,999 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-13 11:07:32,000 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:07:32,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 11:07:32,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 11:07:32,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-13 11:07:32,000 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:07:32,443 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 51 [2020-10-13 11:07:32,581 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 47 [2020-10-13 11:07:32,861 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 63 [2020-10-13 11:07:33,162 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 68 [2020-10-13 11:07:33,394 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 63 [2020-10-13 11:07:33,725 WARN L193 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 69 [2020-10-13 11:07:34,091 WARN L193 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 174 DAG size of output: 69 [2020-10-13 11:07:34,478 WARN L193 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 177 DAG size of output: 69 [2020-10-13 11:07:34,780 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 71 [2020-10-13 11:07:35,073 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 62 [2020-10-13 11:07:35,276 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 49 [2020-10-13 11:07:35,435 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 43 [2020-10-13 11:07:35,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:07:35,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:35,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:35,624 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:07:35,624 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 11:07:35,624 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:07:35,624 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 11:07:35,625 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:07:35,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:07:35,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:07:35,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:07:35,625 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:07:35,650 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 1 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 11:07:35,650 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [222119321] [2020-10-13 11:07:35,651 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:07:35,651 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 11:07:35,651 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659897668] [2020-10-13 11:07:35,651 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 11:07:35,652 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:07:35,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 11:07:35,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2020-10-13 11:07:35,652 INFO L87 Difference]: Start difference. First operand 45 states and 51 transitions. Second operand 18 states. [2020-10-13 11:07:35,839 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 67 [2020-10-13 11:07:35,995 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 60 [2020-10-13 11:07:36,193 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 67 [2020-10-13 11:07:36,521 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 70 [2020-10-13 11:07:36,683 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 59 [2020-10-13 11:07:36,906 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 71 [2020-10-13 11:07:37,080 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 68 [2020-10-13 11:07:37,246 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 74 [2020-10-13 11:07:37,462 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 70 [2020-10-13 11:07:37,659 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 78 [2020-10-13 11:07:37,900 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 65 [2020-10-13 11:07:38,104 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 69 [2020-10-13 11:07:38,362 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 65 [2020-10-13 11:07:38,570 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 73 [2020-10-13 11:07:38,788 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 63 [2020-10-13 11:07:39,165 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 64 [2020-10-13 11:07:39,351 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 64 [2020-10-13 11:07:39,684 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 71 [2020-10-13 11:07:39,837 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 60 [2020-10-13 11:07:40,005 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 68 [2020-10-13 11:07:40,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:07:40,310 INFO L93 Difference]: Finished difference Result 134 states and 169 transitions. [2020-10-13 11:07:40,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-13 11:07:40,311 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 38 [2020-10-13 11:07:40,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:07:40,313 INFO L225 Difference]: With dead ends: 134 [2020-10-13 11:07:40,314 INFO L226 Difference]: Without dead ends: 113 [2020-10-13 11:07:40,315 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=470, Invalid=1252, Unknown=0, NotChecked=0, Total=1722 [2020-10-13 11:07:40,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-13 11:07:40,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 63. [2020-10-13 11:07:40,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-13 11:07:40,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 73 transitions. [2020-10-13 11:07:40,328 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 73 transitions. Word has length 38 [2020-10-13 11:07:40,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:07:40,328 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 73 transitions. [2020-10-13 11:07:40,329 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 11:07:40,329 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 73 transitions. [2020-10-13 11:07:40,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-13 11:07:40,329 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:07:40,330 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:07:40,330 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 11:07:40,330 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:07:40,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:07:40,330 INFO L82 PathProgramCache]: Analyzing trace with hash 2136719058, now seen corresponding path program 2 times [2020-10-13 11:07:40,331 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:07:40,331 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1241103339] [2020-10-13 11:07:40,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:07:40,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:40,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:40,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:40,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:40,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:40,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:41,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:42,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:43,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:44,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:44,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:44,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:45,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:45,352 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:07:45,352 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-13 11:07:45,352 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-13 11:07:45,352 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-13 11:07:45,352 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:07:45,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-13 11:07:45,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 11:07:45,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-13 11:07:45,353 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:07:45,753 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 52 [2020-10-13 11:07:45,923 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 48 [2020-10-13 11:07:46,136 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 61 [2020-10-13 11:07:46,426 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 160 DAG size of output: 68 [2020-10-13 11:07:46,683 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 64 [2020-10-13 11:07:47,087 WARN L193 SmtUtils]: Spent 327.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 67 [2020-10-13 11:07:47,436 WARN L193 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 154 DAG size of output: 81 [2020-10-13 11:07:47,760 WARN L193 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 79 [2020-10-13 11:07:47,995 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 54 [2020-10-13 11:07:48,193 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 48 [2020-10-13 11:07:48,424 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 54 [2020-10-13 11:07:48,671 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 53 [2020-10-13 11:07:48,870 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 50 [2020-10-13 11:07:49,148 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 51 [2020-10-13 11:07:49,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:07:49,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:49,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:49,222 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:07:49,222 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 11:07:49,222 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:07:49,222 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 11:07:49,222 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:07:49,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:07:49,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:07:49,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:07:49,223 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:07:49,274 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 6 proven. 32 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-13 11:07:49,275 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1241103339] [2020-10-13 11:07:49,275 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:07:49,275 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 11:07:49,276 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026190516] [2020-10-13 11:07:49,276 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 11:07:49,276 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:07:49,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 11:07:49,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2020-10-13 11:07:49,279 INFO L87 Difference]: Start difference. First operand 63 states and 73 transitions. Second operand 18 states. [2020-10-13 11:07:49,545 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 70 [2020-10-13 11:07:49,786 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 74 [2020-10-13 11:07:49,932 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 61 [2020-10-13 11:07:50,217 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 79 [2020-10-13 11:07:50,454 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 59 [2020-10-13 11:07:50,604 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 62 [2020-10-13 11:07:50,761 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 60 [2020-10-13 11:07:50,927 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 65 [2020-10-13 11:07:51,134 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 70 [2020-10-13 11:07:51,334 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 74 [2020-10-13 11:07:51,555 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 77 [2020-10-13 11:07:51,819 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 75 [2020-10-13 11:07:52,068 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 80 [2020-10-13 11:07:52,427 WARN L193 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 77 [2020-10-13 11:07:52,776 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 69 [2020-10-13 11:07:53,092 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 84 [2020-10-13 11:07:53,328 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 72 [2020-10-13 11:07:53,702 WARN L193 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 72 [2020-10-13 11:07:53,946 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 70 [2020-10-13 11:07:54,162 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 67 [2020-10-13 11:07:54,419 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 75 [2020-10-13 11:07:54,662 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 63 [2020-10-13 11:07:54,879 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 62 [2020-10-13 11:07:55,069 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 65 [2020-10-13 11:07:55,282 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 65 [2020-10-13 11:07:55,551 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 58 [2020-10-13 11:07:55,844 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 68 [2020-10-13 11:07:55,999 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 56 [2020-10-13 11:07:56,328 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 76 [2020-10-13 11:07:56,700 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 71 [2020-10-13 11:07:57,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:07:57,108 INFO L93 Difference]: Finished difference Result 301 states and 388 transitions. [2020-10-13 11:07:57,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-13 11:07:57,109 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 41 [2020-10-13 11:07:57,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:07:57,114 INFO L225 Difference]: With dead ends: 301 [2020-10-13 11:07:57,114 INFO L226 Difference]: Without dead ends: 271 [2020-10-13 11:07:57,117 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 678 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=659, Invalid=1891, Unknown=0, NotChecked=0, Total=2550 [2020-10-13 11:07:57,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2020-10-13 11:07:57,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 101. [2020-10-13 11:07:57,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-13 11:07:57,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 123 transitions. [2020-10-13 11:07:57,166 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 123 transitions. Word has length 41 [2020-10-13 11:07:57,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:07:57,166 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 123 transitions. [2020-10-13 11:07:57,166 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 11:07:57,166 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 123 transitions. [2020-10-13 11:07:57,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-13 11:07:57,167 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:07:57,168 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:07:57,168 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 11:07:57,168 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:07:57,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:07:57,169 INFO L82 PathProgramCache]: Analyzing trace with hash -1179750661, now seen corresponding path program 1 times [2020-10-13 11:07:57,169 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:07:57,170 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1583688216] [2020-10-13 11:07:57,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:07:57,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:07:57,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:57,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:57,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:57,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:57,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:57,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:57,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:57,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:57,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:07:59,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:00,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:00,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:00,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:00,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:01,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:01,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:01,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:02,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:02,269 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:08:02,270 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-13 11:08:02,270 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-13 11:08:02,270 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5086 [2020-10-13 11:08:02,270 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:08:02,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 11:08:02,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 38 [2020-10-13 11:08:02,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-13 11:08:02,271 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:08:02,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:08:02,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:08:02,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:02,308 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:08:02,308 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 11:08:02,308 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:08:02,308 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 11:08:02,308 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:08:02,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:08:02,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:08:02,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:08:02,309 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:08:02,311 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 13 proven. 1 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2020-10-13 11:08:02,311 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1583688216] [2020-10-13 11:08:02,312 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:08:02,312 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 11:08:02,312 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [551696267] [2020-10-13 11:08:02,312 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 11:08:02,312 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:08:02,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 11:08:02,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-13 11:08:02,313 INFO L87 Difference]: Start difference. First operand 101 states and 123 transitions. Second operand 6 states. [2020-10-13 11:08:02,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:08:02,485 INFO L93 Difference]: Finished difference Result 117 states and 141 transitions. [2020-10-13 11:08:02,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 11:08:02,486 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 47 [2020-10-13 11:08:02,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:08:02,487 INFO L225 Difference]: With dead ends: 117 [2020-10-13 11:08:02,487 INFO L226 Difference]: Without dead ends: 106 [2020-10-13 11:08:02,488 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-13 11:08:02,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-13 11:08:02,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 101. [2020-10-13 11:08:02,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-13 11:08:02,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 123 transitions. [2020-10-13 11:08:02,507 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 123 transitions. Word has length 47 [2020-10-13 11:08:02,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:08:02,507 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 123 transitions. [2020-10-13 11:08:02,507 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 11:08:02,508 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 123 transitions. [2020-10-13 11:08:02,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-13 11:08:02,509 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:08:02,509 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:08:02,509 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 11:08:02,509 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:08:02,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:08:02,510 INFO L82 PathProgramCache]: Analyzing trace with hash 378416852, now seen corresponding path program 1 times [2020-10-13 11:08:02,510 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:08:02,510 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1263091105] [2020-10-13 11:08:02,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:08:02,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:08:02,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:02,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:02,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:02,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:02,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:03,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:03,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:04,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:04,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:07,524 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:08:07,524 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-13 11:08:07,524 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-13 11:08:07,524 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 11:08:07,525 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:08:07,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 11:08:07,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 11:08:07,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 11:08:07,525 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:08:07,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 11:08:07,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:08:07,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:07,574 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:08:07,574 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 11:08:07,574 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 11:08:07,574 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 11:08:07,574 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:08:07,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 11:08:07,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 11:08:07,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 11:08:07,575 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:08:07,579 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2020-10-13 11:08:07,579 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1263091105] [2020-10-13 11:08:07,579 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 11:08:07,580 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 11:08:07,580 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076362129] [2020-10-13 11:08:07,580 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 11:08:07,580 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 11:08:07,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 11:08:07,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-13 11:08:07,581 INFO L87 Difference]: Start difference. First operand 101 states and 123 transitions. Second operand 7 states. [2020-10-13 11:08:07,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 11:08:07,749 INFO L93 Difference]: Finished difference Result 185 states and 233 transitions. [2020-10-13 11:08:07,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 11:08:07,749 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 50 [2020-10-13 11:08:07,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 11:08:07,751 INFO L225 Difference]: With dead ends: 185 [2020-10-13 11:08:07,751 INFO L226 Difference]: Without dead ends: 129 [2020-10-13 11:08:07,752 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-10-13 11:08:07,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-13 11:08:07,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 112. [2020-10-13 11:08:07,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-13 11:08:07,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 135 transitions. [2020-10-13 11:08:07,772 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 135 transitions. Word has length 50 [2020-10-13 11:08:07,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 11:08:07,772 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 135 transitions. [2020-10-13 11:08:07,772 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 11:08:07,772 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 135 transitions. [2020-10-13 11:08:07,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-13 11:08:07,773 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 11:08:07,774 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 11:08:07,774 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 11:08:07,774 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 11:08:07,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 11:08:07,774 INFO L82 PathProgramCache]: Analyzing trace with hash 988806564, now seen corresponding path program 2 times [2020-10-13 11:08:07,775 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 11:08:07,775 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1585066365] [2020-10-13 11:08:07,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 11:08:07,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 11:08:07,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:07,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:07,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:07,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:08,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:08,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:08,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:09,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:09,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:09,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:10,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:10,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:10,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:11,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:12,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:12,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 11:08:13,065 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 11:08:13,065 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-13 11:08:13,065 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-13 11:08:13,065 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5274 [2020-10-13 11:08:13,066 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 11:08:13,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 11:08:13,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 11:08:13,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-13 11:08:13,066 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 11:08:13,165 ERROR L253 erpolLogProxyWrapper]: Interpolant 22 not inductive [2020-10-13 11:08:13,170 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 11:08:13,170 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: generated interpolants did not pass sanity check at de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.getInterpolants(Interpolator.java:219) at de.uni_freiburg.informatik.ultimate.smtinterpol.smtlib2.SMTInterpol.getInterpolants(SMTInterpol.java:849) at de.uni_freiburg.informatik.ultimate.smtinterpol.muses.MusEnumerationScript.getInterpolants(MusEnumerationScript.java:155) at de.uni_freiburg.informatik.ultimate.smtinterpol.muses.MusEnumerationScript.getInterpolants(MusEnumerationScript.java:256) at de.uni_freiburg.informatik.ultimate.smtinterpol.muses.MusEnumerationScript.getInterpolants(MusEnumerationScript.java:150) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.getInterpolants(WrapperScript.java:337) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.getInterpolants(WrapperScript.java:337) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.getInterpolants(ManagedScript.java:191) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.NestedInterpolantsBuilder.computeCraigInterpolants(NestedInterpolantsBuilder.java:285) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.NestedInterpolantsBuilder.(NestedInterpolantsBuilder.java:166) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolantsRecursive(InterpolatingTraceCheckCraig.java:326) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolants(InterpolatingTraceCheckCraig.java:228) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.(InterpolatingTraceCheckCraig.java:97) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModulePreferences.construct(IpTcStrategyModulePreferences.java:106) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:57) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:242) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:166) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:75) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:508) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:436) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:370) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:142) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:334) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:175) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:120) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:317) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) [2020-10-13 11:08:13,176 INFO L168 Benchmark]: Toolchain (without parser) took 72821.76 ms. Allocated memory was 141.0 MB in the beginning and 845.7 MB in the end (delta: 704.6 MB). Free memory was 103.7 MB in the beginning and 214.1 MB in the end (delta: -110.3 MB). Peak memory consumption was 698.0 MB. Max. memory is 7.1 GB. [2020-10-13 11:08:13,176 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 141.0 MB. Free memory was 122.6 MB in the beginning and 122.4 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-10-13 11:08:13,177 INFO L168 Benchmark]: CACSL2BoogieTranslator took 419.76 ms. Allocated memory was 141.0 MB in the beginning and 203.9 MB in the end (delta: 62.9 MB). Free memory was 103.5 MB in the beginning and 181.4 MB in the end (delta: -77.9 MB). Peak memory consumption was 22.0 MB. Max. memory is 7.1 GB. [2020-10-13 11:08:13,177 INFO L168 Benchmark]: Boogie Preprocessor took 63.04 ms. Allocated memory is still 203.9 MB. Free memory was 181.4 MB in the beginning and 178.8 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 7.1 GB. [2020-10-13 11:08:13,178 INFO L168 Benchmark]: RCFGBuilder took 491.61 ms. Allocated memory is still 203.9 MB. Free memory was 178.8 MB in the beginning and 156.5 MB in the end (delta: 22.3 MB). Peak memory consumption was 22.3 MB. Max. memory is 7.1 GB. [2020-10-13 11:08:13,179 INFO L168 Benchmark]: TraceAbstraction took 71842.37 ms. Allocated memory was 203.9 MB in the beginning and 845.7 MB in the end (delta: 641.7 MB). Free memory was 155.9 MB in the beginning and 214.1 MB in the end (delta: -58.2 MB). Peak memory consumption was 687.3 MB. Max. memory is 7.1 GB. [2020-10-13 11:08:13,182 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 141.0 MB. Free memory was 122.6 MB in the beginning and 122.4 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 419.76 ms. Allocated memory was 141.0 MB in the beginning and 203.9 MB in the end (delta: 62.9 MB). Free memory was 103.5 MB in the beginning and 181.4 MB in the end (delta: -77.9 MB). Peak memory consumption was 22.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 63.04 ms. Allocated memory is still 203.9 MB. Free memory was 181.4 MB in the beginning and 178.8 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 491.61 ms. Allocated memory is still 203.9 MB. Free memory was 178.8 MB in the beginning and 156.5 MB in the end (delta: 22.3 MB). Peak memory consumption was 22.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 71842.37 ms. Allocated memory was 203.9 MB in the beginning and 845.7 MB in the end (delta: 641.7 MB). Free memory was 155.9 MB in the beginning and 214.1 MB in the end (delta: -58.2 MB). Peak memory consumption was 687.3 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: generated interpolants did not pass sanity check de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: generated interpolants did not pass sanity check: de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.getInterpolants(Interpolator.java:219) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...