/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.4 --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/seq-mthreaded-reduced/pals_lcr.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 08:36:24,950 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 08:36:24,952 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 08:36:24,983 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 08:36:24,983 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 08:36:24,991 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 08:36:24,992 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 08:36:24,995 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 08:36:24,998 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 08:36:25,000 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 08:36:25,001 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 08:36:25,004 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 08:36:25,004 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 08:36:25,007 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 08:36:25,009 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 08:36:25,011 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 08:36:25,012 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 08:36:25,013 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 08:36:25,014 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 08:36:25,021 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 08:36:25,023 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 08:36:25,024 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 08:36:25,025 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 08:36:25,026 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 08:36:25,037 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 08:36:25,037 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 08:36:25,038 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 08:36:25,038 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 08:36:25,039 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 08:36:25,041 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 08:36:25,041 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 08:36:25,043 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 08:36:25,043 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 08:36:25,044 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 08:36:25,046 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 08:36:25,046 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 08:36:25,047 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 08:36:25,047 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 08:36:25,048 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 08:36:25,048 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 08:36:25,050 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 08:36:25,050 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 [2020-10-14 08:36:25,092 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 08:36:25,092 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 08:36:25,094 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 08:36:25,094 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 08:36:25,094 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 08:36:25,094 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 08:36:25,095 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 08:36:25,095 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 08:36:25,095 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 08:36:25,095 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 08:36:25,096 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 08:36:25,096 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 08:36:25,097 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 08:36:25,097 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 08:36:25,097 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 08:36:25,098 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 08:36:25,098 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 08:36:25,098 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 08:36:25,098 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 08:36:25,098 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 08:36:25,099 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 08:36:25,099 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 08:36:25,099 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 08:36:25,099 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 08:36:25,099 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 08:36:25,100 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 08:36:25,100 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 08:36:25,100 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 08:36:25,100 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 08:36:25,100 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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;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=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; [2020-10-14 08:36:25,427 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 08:36:25,438 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 08:36:25,441 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 08:36:25,443 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 08:36:25,443 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 08:36:25,444 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-10-14 08:36:25,498 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/971eff9f3/a91858d9c3bd4f20a9d89a2c8608ede4/FLAGae1503776 [2020-10-14 08:36:26,019 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 08:36:26,020 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-10-14 08:36:26,035 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/971eff9f3/a91858d9c3bd4f20a9d89a2c8608ede4/FLAGae1503776 [2020-10-14 08:36:26,343 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/971eff9f3/a91858d9c3bd4f20a9d89a2c8608ede4 [2020-10-14 08:36:26,352 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 08:36:26,354 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 08:36:26,355 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 08:36:26,355 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 08:36:26,359 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 08:36:26,360 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 08:36:26" (1/1) ... [2020-10-14 08:36:26,364 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@18e58bfa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:36:26, skipping insertion in model container [2020-10-14 08:36:26,364 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 08:36:26" (1/1) ... [2020-10-14 08:36:26,372 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 08:36:26,410 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 08:36:26,627 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 08:36:26,638 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 08:36:26,800 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 08:36:26,821 INFO L208 MainTranslator]: Completed translation [2020-10-14 08:36:26,822 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:36:26 WrapperNode [2020-10-14 08:36:26,822 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 08:36:26,824 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 08:36:26,824 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 08:36:26,824 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 08:36:26,839 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:36:26" (1/1) ... [2020-10-14 08:36:26,841 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:36:26" (1/1) ... [2020-10-14 08:36:26,850 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:36:26" (1/1) ... [2020-10-14 08:36:26,851 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:36:26" (1/1) ... [2020-10-14 08:36:26,861 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:36:26" (1/1) ... [2020-10-14 08:36:26,867 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:36:26" (1/1) ... [2020-10-14 08:36:26,870 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:36:26" (1/1) ... [2020-10-14 08:36:26,874 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 08:36:26,874 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 08:36:26,875 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 08:36:26,875 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 08:36:26,876 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:36:26" (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 [2020-10-14 08:36:26,944 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 08:36:26,944 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 08:36:26,945 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-14 08:36:26,946 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 08:36:26,946 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 08:36:26,946 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-14 08:36:26,946 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-14 08:36:26,947 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-14 08:36:26,948 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-14 08:36:26,948 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-14 08:36:26,948 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-14 08:36:26,948 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-14 08:36:26,949 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-14 08:36:26,949 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-14 08:36:26,949 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-14 08:36:26,950 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-14 08:36:26,950 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-14 08:36:26,950 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 08:36:26,950 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 08:36:26,950 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 08:36:27,431 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 08:36:27,431 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-14 08:36:27,438 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 08:36:27 BoogieIcfgContainer [2020-10-14 08:36:27,438 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 08:36:27,443 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 08:36:27,443 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 08:36:27,449 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 08:36:27,452 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 08:36:26" (1/3) ... [2020-10-14 08:36:27,453 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6aa193b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 08:36:27, skipping insertion in model container [2020-10-14 08:36:27,453 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:36:26" (2/3) ... [2020-10-14 08:36:27,455 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6aa193b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 08:36:27, skipping insertion in model container [2020-10-14 08:36:27,455 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 08:36:27" (3/3) ... [2020-10-14 08:36:27,459 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_lcr.3.1.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-10-14 08:36:27,470 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 08:36:27,484 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 08:36:27,495 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 08:36:27,523 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 08:36:27,523 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 08:36:27,524 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 08:36:27,524 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 08:36:27,524 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 08:36:27,524 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 08:36:27,525 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 08:36:27,525 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 08:36:27,543 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states. [2020-10-14 08:36:27,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-14 08:36:27,552 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:36:27,553 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 08:36:27,553 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:36:27,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:36:27,560 INFO L82 PathProgramCache]: Analyzing trace with hash -1803074216, now seen corresponding path program 1 times [2020-10-14 08:36:27,567 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:36:27,568 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [424101905] [2020-10-14 08:36:27,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:36:27,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:36:27,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:36:28,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:36:28,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:36:28,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:36:29,491 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:36:29,491 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-14 08:36:29,492 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 08:36:29,492 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1716 [2020-10-14 08:36:29,496 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:36:29,496 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:36:29,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:36:29,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 08:36:29,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-14 08:36:29,497 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-14 08:36:29,718 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-10-14 08:36:29,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:36:29,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:36:29,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:36:29,755 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:36:29,755 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:36:29,755 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:36:29,756 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-14 08:36:29,757 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:36:29,757 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:36:29,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:36:29,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:36:29,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:36:29,758 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:36:29,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 08:36:29,784 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [424101905] [2020-10-14 08:36:29,788 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:36:29,788 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 08:36:29,790 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395655065] [2020-10-14 08:36:29,798 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 08:36:29,799 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:36:29,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 08:36:29,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:36:29,824 INFO L87 Difference]: Start difference. First operand 67 states. Second operand 4 states. [2020-10-14 08:36:30,046 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2020-10-14 08:36:30,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:36:30,549 INFO L93 Difference]: Finished difference Result 147 states and 231 transitions. [2020-10-14 08:36:30,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 08:36:30,552 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 40 [2020-10-14 08:36:30,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:36:30,575 INFO L225 Difference]: With dead ends: 147 [2020-10-14 08:36:30,576 INFO L226 Difference]: Without dead ends: 95 [2020-10-14 08:36:30,581 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 08:36:30,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-14 08:36:30,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 93. [2020-10-14 08:36:30,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-14 08:36:30,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 134 transitions. [2020-10-14 08:36:30,662 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 134 transitions. Word has length 40 [2020-10-14 08:36:30,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:36:30,663 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 134 transitions. [2020-10-14 08:36:30,663 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 08:36:30,664 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 134 transitions. [2020-10-14 08:36:30,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-14 08:36:30,668 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:36:30,668 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 08:36:30,669 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 08:36:30,669 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:36:30,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:36:30,670 INFO L82 PathProgramCache]: Analyzing trace with hash 1722155448, now seen corresponding path program 1 times [2020-10-14 08:36:30,671 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:36:30,671 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1163169957] [2020-10-14 08:36:30,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:36:30,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:36:30,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:36:30,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:36:30,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:36:31,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:36:32,151 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:36:32,151 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-14 08:36:32,151 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 08:36:32,152 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1427 [2020-10-14 08:36:32,152 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:36:32,152 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:36:32,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:36:32,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-14 08:36:32,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-14 08:36:32,154 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:36:32,309 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-10-14 08:36:32,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:36:32,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:36:32,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:36:32,324 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:36:32,324 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:36:32,324 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:36:32,325 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-14 08:36:32,325 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:36:32,325 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:36:32,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:36:32,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:36:32,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:36:32,326 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:36:32,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 08:36:32,336 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1163169957] [2020-10-14 08:36:32,337 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:36:32,337 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 08:36:32,337 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220476896] [2020-10-14 08:36:32,340 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 08:36:32,340 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:36:32,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 08:36:32,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:36:32,341 INFO L87 Difference]: Start difference. First operand 93 states and 134 transitions. Second operand 4 states. [2020-10-14 08:36:32,504 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2020-10-14 08:36:32,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:36:32,764 INFO L93 Difference]: Finished difference Result 217 states and 330 transitions. [2020-10-14 08:36:32,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 08:36:32,765 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 41 [2020-10-14 08:36:32,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:36:32,767 INFO L225 Difference]: With dead ends: 217 [2020-10-14 08:36:32,767 INFO L226 Difference]: Without dead ends: 147 [2020-10-14 08:36:32,769 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 08:36:32,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-10-14 08:36:32,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 145. [2020-10-14 08:36:32,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-14 08:36:32,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 216 transitions. [2020-10-14 08:36:32,790 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 216 transitions. Word has length 41 [2020-10-14 08:36:32,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:36:32,790 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 216 transitions. [2020-10-14 08:36:32,790 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 08:36:32,790 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 216 transitions. [2020-10-14 08:36:32,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-14 08:36:32,792 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:36:32,792 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 08:36:32,793 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 08:36:32,793 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:36:32,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:36:32,794 INFO L82 PathProgramCache]: Analyzing trace with hash 1351365489, now seen corresponding path program 1 times [2020-10-14 08:36:32,794 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:36:32,794 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1720077835] [2020-10-14 08:36:32,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:36:32,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:36:32,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:36:32,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:36:32,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:36:33,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:36:33,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:36:35,882 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:36:35,883 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-14 08:36:35,883 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 08:36:35,883 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3063 [2020-10-14 08:36:35,884 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:36:35,884 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:36:35,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:36:35,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-14 08:36:35,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-14 08:36:35,885 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:36:36,046 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-10-14 08:36:36,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:36:36,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:36:36,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:36:36,061 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:36:36,062 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:36:36,062 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:36:36,063 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-14 08:36:36,063 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:36:36,064 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:36:36,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:36:36,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:36:36,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:36:36,066 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-14 08:36:36,080 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 08:36:36,081 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1720077835] [2020-10-14 08:36:36,081 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:36:36,082 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 08:36:36,082 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61509383] [2020-10-14 08:36:36,082 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 08:36:36,083 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:36:36,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 08:36:36,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:36:36,083 INFO L87 Difference]: Start difference. First operand 145 states and 216 transitions. Second operand 4 states. [2020-10-14 08:36:36,260 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 92 [2020-10-14 08:36:36,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:36:36,573 INFO L93 Difference]: Finished difference Result 357 states and 550 transitions. [2020-10-14 08:36:36,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 08:36:36,574 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 42 [2020-10-14 08:36:36,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:36:36,576 INFO L225 Difference]: With dead ends: 357 [2020-10-14 08:36:36,577 INFO L226 Difference]: Without dead ends: 235 [2020-10-14 08:36:36,578 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 08:36:36,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2020-10-14 08:36:36,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 233. [2020-10-14 08:36:36,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 233 states. [2020-10-14 08:36:36,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 352 transitions. [2020-10-14 08:36:36,600 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 352 transitions. Word has length 42 [2020-10-14 08:36:36,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:36:36,600 INFO L479 AbstractCegarLoop]: Abstraction has 233 states and 352 transitions. [2020-10-14 08:36:36,600 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 08:36:36,601 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 352 transitions. [2020-10-14 08:36:36,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-14 08:36:36,602 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:36:36,602 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 08:36:36,602 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 08:36:36,602 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:36:36,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:36:36,603 INFO L82 PathProgramCache]: Analyzing trace with hash -526265596, now seen corresponding path program 1 times [2020-10-14 08:36:36,606 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:36:36,606 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [74160496] [2020-10-14 08:36:36,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:36:36,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:36:36,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:36:36,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:36:36,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:36:36,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:36:36,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:36:37,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:36:38,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:36:41,624 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:36:41,625 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-14 08:36:41,625 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 08:36:41,625 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-14 08:36:41,626 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:36:41,626 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:36:41,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 08:36:41,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 08:36:41,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-14 08:36:41,631 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-14 08:36:41,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:36:41,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:36:41,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:36:41,778 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:36:41,778 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:36:41,779 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:36:41,779 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-14 08:36:41,779 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:36:41,779 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:36:41,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:36:41,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:36:41,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 08:36:41,780 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:36:41,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 08:36:41,791 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [74160496] [2020-10-14 08:36:41,791 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:36:41,791 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 08:36:41,791 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850114495] [2020-10-14 08:36:41,792 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 08:36:41,792 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:36:41,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 08:36:41,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 08:36:41,793 INFO L87 Difference]: Start difference. First operand 233 states and 352 transitions. Second operand 6 states. [2020-10-14 08:36:42,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:36:42,135 INFO L93 Difference]: Finished difference Result 443 states and 681 transitions. [2020-10-14 08:36:42,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 08:36:42,136 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 43 [2020-10-14 08:36:42,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:36:42,139 INFO L225 Difference]: With dead ends: 443 [2020-10-14 08:36:42,139 INFO L226 Difference]: Without dead ends: 233 [2020-10-14 08:36:42,141 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-14 08:36:42,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-10-14 08:36:42,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 233. [2020-10-14 08:36:42,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 233 states. [2020-10-14 08:36:42,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 348 transitions. [2020-10-14 08:36:42,165 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 348 transitions. Word has length 43 [2020-10-14 08:36:42,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:36:42,165 INFO L479 AbstractCegarLoop]: Abstraction has 233 states and 348 transitions. [2020-10-14 08:36:42,165 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 08:36:42,165 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 348 transitions. [2020-10-14 08:36:42,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-14 08:36:42,167 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:36:42,167 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 08:36:42,167 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-14 08:36:42,167 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:36:42,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:36:42,168 INFO L82 PathProgramCache]: Analyzing trace with hash 747602409, now seen corresponding path program 1 times [2020-10-14 08:36:42,168 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:36:42,168 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1857734621] [2020-10-14 08:36:42,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:36:42,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:36:42,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:36:42,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:36:42,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:36:42,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:36:43,539 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:36:43,540 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-14 08:36:43,540 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 08:36:43,540 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1352 [2020-10-14 08:36:43,541 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:36:43,541 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:36:43,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 08:36:43,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-14 08:36:43,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-14 08:36:43,543 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:36:43,724 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-10-14 08:36:43,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:36:43,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:36:43,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:36:43,736 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:36:43,737 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:36:43,737 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:36:43,738 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-14 08:36:43,738 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:36:43,738 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:36:43,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:36:43,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:36:43,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:36:43,740 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:36:43,754 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 08:36:43,754 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1857734621] [2020-10-14 08:36:43,755 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:36:43,755 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-14 08:36:43,756 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022669864] [2020-10-14 08:36:43,756 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 08:36:43,756 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:36:43,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 08:36:43,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 08:36:43,758 INFO L87 Difference]: Start difference. First operand 233 states and 348 transitions. Second operand 6 states. [2020-10-14 08:36:43,940 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2020-10-14 08:36:44,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:36:44,437 INFO L93 Difference]: Finished difference Result 1493 states and 2298 transitions. [2020-10-14 08:36:44,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 08:36:44,438 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 43 [2020-10-14 08:36:44,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:36:44,447 INFO L225 Difference]: With dead ends: 1493 [2020-10-14 08:36:44,447 INFO L226 Difference]: Without dead ends: 1283 [2020-10-14 08:36:44,449 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-14 08:36:44,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1283 states. [2020-10-14 08:36:44,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1283 to 441. [2020-10-14 08:36:44,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 441 states. [2020-10-14 08:36:44,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 656 transitions. [2020-10-14 08:36:44,508 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 656 transitions. Word has length 43 [2020-10-14 08:36:44,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:36:44,509 INFO L479 AbstractCegarLoop]: Abstraction has 441 states and 656 transitions. [2020-10-14 08:36:44,509 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 08:36:44,509 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 656 transitions. [2020-10-14 08:36:44,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-14 08:36:44,510 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:36:44,510 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 08:36:44,511 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-14 08:36:44,511 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:36:44,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:36:44,511 INFO L82 PathProgramCache]: Analyzing trace with hash 313232099, now seen corresponding path program 1 times [2020-10-14 08:36:44,512 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:36:44,512 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [3977487] [2020-10-14 08:36:44,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:36:44,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:36:44,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:36:44,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:36:44,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:36:44,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:36:45,834 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:36:45,835 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-14 08:36:45,835 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 08:36:45,835 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1305 [2020-10-14 08:36:45,835 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:36:45,836 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:36:45,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 08:36:45,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-14 08:36:45,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-14 08:36:45,837 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:36:46,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:36:46,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:36:46,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:36:46,035 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:36:46,036 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:36:46,036 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:36:46,036 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 08:36:46,036 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:36:46,037 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:36:46,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:36:46,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:36:46,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:36:46,038 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:36:46,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 08:36:46,051 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [3977487] [2020-10-14 08:36:46,052 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:36:46,052 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-14 08:36:46,053 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741597377] [2020-10-14 08:36:46,053 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 08:36:46,053 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:36:46,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 08:36:46,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 08:36:46,054 INFO L87 Difference]: Start difference. First operand 441 states and 656 transitions. Second operand 6 states. [2020-10-14 08:36:46,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:36:46,577 INFO L93 Difference]: Finished difference Result 1701 states and 2558 transitions. [2020-10-14 08:36:46,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 08:36:46,578 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 45 [2020-10-14 08:36:46,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:36:46,586 INFO L225 Difference]: With dead ends: 1701 [2020-10-14 08:36:46,587 INFO L226 Difference]: Without dead ends: 1283 [2020-10-14 08:36:46,589 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-14 08:36:46,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1283 states. [2020-10-14 08:36:46,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1283 to 441. [2020-10-14 08:36:46,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 441 states. [2020-10-14 08:36:46,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 648 transitions. [2020-10-14 08:36:46,642 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 648 transitions. Word has length 45 [2020-10-14 08:36:46,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:36:46,643 INFO L479 AbstractCegarLoop]: Abstraction has 441 states and 648 transitions. [2020-10-14 08:36:46,643 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 08:36:46,643 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 648 transitions. [2020-10-14 08:36:46,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-14 08:36:46,650 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:36:46,650 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 08:36:46,651 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-14 08:36:46,651 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:36:46,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:36:46,651 INFO L82 PathProgramCache]: Analyzing trace with hash 293182756, now seen corresponding path program 1 times [2020-10-14 08:36:46,651 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:36:46,652 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [640539375] [2020-10-14 08:36:46,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:36:46,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:36:46,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:36:46,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:36:46,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:36:47,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:36:47,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:36:47,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:36:48,200 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:36:48,201 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-14 08:36:48,201 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 08:36:48,201 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1531 [2020-10-14 08:36:48,202 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:36:48,202 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:36:48,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:36:48,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 08:36:48,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-14 08:36:48,203 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:36:48,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:36:48,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:36:48,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:36:48,304 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:36:48,304 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:36:48,305 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:36:48,305 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-14 08:36:48,305 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:36:48,305 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:36:48,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:36:48,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:36:48,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:36:48,306 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:36:48,313 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 08:36:48,314 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [640539375] [2020-10-14 08:36:48,315 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:36:48,315 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 08:36:48,315 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791915884] [2020-10-14 08:36:48,316 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 08:36:48,317 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:36:48,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 08:36:48,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:36:48,318 INFO L87 Difference]: Start difference. First operand 441 states and 648 transitions. Second operand 4 states. [2020-10-14 08:36:48,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:36:48,713 INFO L93 Difference]: Finished difference Result 1059 states and 1568 transitions. [2020-10-14 08:36:48,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 08:36:48,714 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 45 [2020-10-14 08:36:48,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:36:48,719 INFO L225 Difference]: With dead ends: 1059 [2020-10-14 08:36:48,719 INFO L226 Difference]: Without dead ends: 641 [2020-10-14 08:36:48,721 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-14 08:36:48,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 641 states. [2020-10-14 08:36:48,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 641 to 639. [2020-10-14 08:36:48,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 639 states. [2020-10-14 08:36:48,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 639 states to 639 states and 930 transitions. [2020-10-14 08:36:48,800 INFO L78 Accepts]: Start accepts. Automaton has 639 states and 930 transitions. Word has length 45 [2020-10-14 08:36:48,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:36:48,801 INFO L479 AbstractCegarLoop]: Abstraction has 639 states and 930 transitions. [2020-10-14 08:36:48,801 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 08:36:48,801 INFO L276 IsEmpty]: Start isEmpty. Operand 639 states and 930 transitions. [2020-10-14 08:36:48,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-14 08:36:48,804 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:36:48,804 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 08:36:48,805 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-14 08:36:48,805 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:36:48,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:36:48,806 INFO L82 PathProgramCache]: Analyzing trace with hash 1118351057, now seen corresponding path program 1 times [2020-10-14 08:36:48,806 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:36:48,806 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1982441681] [2020-10-14 08:36:48,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:36:48,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:36:48,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:36:48,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:36:49,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:36:49,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:36:49,931 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:36:49,931 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-14 08:36:49,931 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 08:36:49,931 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1104 [2020-10-14 08:36:49,932 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:36:49,932 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:36:49,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 08:36:49,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 08:36:49,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-14 08:36:49,933 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:36:50,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:36:50,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:36:50,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:36:50,078 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:36:50,078 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:36:50,078 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:36:50,078 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-14 08:36:50,079 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:36:50,079 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:36:50,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:36:50,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:36:50,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 08:36:50,080 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:36:50,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 08:36:50,089 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1982441681] [2020-10-14 08:36:50,090 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:36:50,090 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 08:36:50,090 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788074050] [2020-10-14 08:36:50,091 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 08:36:50,091 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:36:50,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 08:36:50,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 08:36:50,096 INFO L87 Difference]: Start difference. First operand 639 states and 930 transitions. Second operand 6 states. [2020-10-14 08:36:50,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:36:50,573 INFO L93 Difference]: Finished difference Result 1855 states and 2716 transitions. [2020-10-14 08:36:50,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 08:36:50,573 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 46 [2020-10-14 08:36:50,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:36:50,581 INFO L225 Difference]: With dead ends: 1855 [2020-10-14 08:36:50,581 INFO L226 Difference]: Without dead ends: 1241 [2020-10-14 08:36:50,584 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-14 08:36:50,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1241 states. [2020-10-14 08:36:50,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1241 to 1239. [2020-10-14 08:36:50,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1239 states. [2020-10-14 08:36:50,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1239 states to 1239 states and 1798 transitions. [2020-10-14 08:36:50,739 INFO L78 Accepts]: Start accepts. Automaton has 1239 states and 1798 transitions. Word has length 46 [2020-10-14 08:36:50,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:36:50,740 INFO L479 AbstractCegarLoop]: Abstraction has 1239 states and 1798 transitions. [2020-10-14 08:36:50,740 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 08:36:50,740 INFO L276 IsEmpty]: Start isEmpty. Operand 1239 states and 1798 transitions. [2020-10-14 08:36:50,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-14 08:36:50,741 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:36:50,741 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 08:36:50,741 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-14 08:36:50,741 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:36:50,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:36:50,742 INFO L82 PathProgramCache]: Analyzing trace with hash 1983883446, now seen corresponding path program 1 times [2020-10-14 08:36:50,742 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:36:50,743 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1483979155] [2020-10-14 08:36:50,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:36:50,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:36:50,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:36:50,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:36:50,976 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:36:50,976 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-14 08:36:50,977 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-14 08:36:50,977 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 217 [2020-10-14 08:36:50,977 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:36:50,977 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:36:50,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 08:36:50,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 08:36:50,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-14 08:36:50,978 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:36:51,088 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:36:51,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:36:51,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:36:51,103 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:36:51,103 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:36:51,104 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:36:51,104 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-14 08:36:51,104 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:36:51,104 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:36:51,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:36:51,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:36:51,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 08:36:51,105 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:36:51,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 08:36:51,115 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1483979155] [2020-10-14 08:36:51,115 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:36:51,116 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 08:36:51,116 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545804196] [2020-10-14 08:36:51,117 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 08:36:51,117 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:36:51,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 08:36:51,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 08:36:51,118 INFO L87 Difference]: Start difference. First operand 1239 states and 1798 transitions. Second operand 6 states. [2020-10-14 08:36:51,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:36:51,642 INFO L93 Difference]: Finished difference Result 3263 states and 4764 transitions. [2020-10-14 08:36:51,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 08:36:51,643 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 46 [2020-10-14 08:36:51,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:36:51,654 INFO L225 Difference]: With dead ends: 3263 [2020-10-14 08:36:51,654 INFO L226 Difference]: Without dead ends: 2049 [2020-10-14 08:36:51,657 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-14 08:36:51,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2049 states. [2020-10-14 08:36:51,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2049 to 2047. [2020-10-14 08:36:51,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2047 states. [2020-10-14 08:36:51,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2047 states to 2047 states and 2958 transitions. [2020-10-14 08:36:51,917 INFO L78 Accepts]: Start accepts. Automaton has 2047 states and 2958 transitions. Word has length 46 [2020-10-14 08:36:51,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:36:51,919 INFO L479 AbstractCegarLoop]: Abstraction has 2047 states and 2958 transitions. [2020-10-14 08:36:51,919 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 08:36:51,919 INFO L276 IsEmpty]: Start isEmpty. Operand 2047 states and 2958 transitions. [2020-10-14 08:36:51,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-14 08:36:51,921 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:36:51,921 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 08:36:51,921 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-14 08:36:51,922 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:36:51,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:36:51,922 INFO L82 PathProgramCache]: Analyzing trace with hash 2111968753, now seen corresponding path program 1 times [2020-10-14 08:36:51,922 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:36:51,923 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1908185641] [2020-10-14 08:36:51,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:36:51,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:36:51,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:36:52,024 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:36:52,025 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-14 08:36:52,025 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:36:52,026 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 86 [2020-10-14 08:36:52,026 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:36:52,026 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:36:52,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 08:36:52,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 48 [2020-10-14 08:36:52,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-14 08:36:52,027 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:36:52,131 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:36:52,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:36:52,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:36:52,140 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:36:52,140 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:36:52,141 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:36:52,141 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-14 08:36:52,141 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:36:52,141 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:36:52,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:36:52,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:36:52,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:36:52,142 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:36:52,148 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 08:36:52,148 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1908185641] [2020-10-14 08:36:52,148 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:36:52,148 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 08:36:52,149 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633917758] [2020-10-14 08:36:52,149 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 08:36:52,149 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:36:52,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 08:36:52,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 08:36:52,151 INFO L87 Difference]: Start difference. First operand 2047 states and 2958 transitions. Second operand 5 states. [2020-10-14 08:36:52,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:36:52,933 INFO L93 Difference]: Finished difference Result 3905 states and 5608 transitions. [2020-10-14 08:36:52,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 08:36:52,934 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 46 [2020-10-14 08:36:52,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:36:52,954 INFO L225 Difference]: With dead ends: 3905 [2020-10-14 08:36:52,954 INFO L226 Difference]: Without dead ends: 3903 [2020-10-14 08:36:52,958 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-14 08:36:52,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3903 states. [2020-10-14 08:36:53,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3903 to 2175. [2020-10-14 08:36:53,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2175 states. [2020-10-14 08:36:53,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2175 states to 2175 states and 3078 transitions. [2020-10-14 08:36:53,213 INFO L78 Accepts]: Start accepts. Automaton has 2175 states and 3078 transitions. Word has length 46 [2020-10-14 08:36:53,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:36:53,213 INFO L479 AbstractCegarLoop]: Abstraction has 2175 states and 3078 transitions. [2020-10-14 08:36:53,213 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 08:36:53,214 INFO L276 IsEmpty]: Start isEmpty. Operand 2175 states and 3078 transitions. [2020-10-14 08:36:53,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-14 08:36:53,215 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:36:53,215 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 08:36:53,215 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-14 08:36:53,216 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:36:53,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:36:53,216 INFO L82 PathProgramCache]: Analyzing trace with hash -1060358588, now seen corresponding path program 1 times [2020-10-14 08:36:53,216 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:36:53,217 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [28779792] [2020-10-14 08:36:53,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:36:53,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:36:53,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:36:53,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:36:53,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:36:54,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:36:54,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:36:54,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:36:54,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:36:55,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:36:56,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:36:56,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:36:56,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:36:57,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:36:57,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:36:58,239 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:36:58,239 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-14 08:36:58,240 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-14 08:36:58,240 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-14 08:36:58,240 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:36:58,240 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:36:58,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 08:36:58,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-14 08:36:58,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-14 08:36:58,242 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:36:58,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:36:58,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:36:58,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:36:58,360 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:36:58,360 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:36:58,360 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:36:58,361 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 08:36:58,361 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:36:58,361 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:36:58,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:36:58,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:36:58,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:36:58,362 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:36:58,374 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-14 08:36:58,374 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [28779792] [2020-10-14 08:36:58,375 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 08:36:58,375 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-14 08:36:58,375 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122581854] [2020-10-14 08:36:58,375 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 08:36:58,376 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:36:58,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 08:36:58,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 08:36:58,376 INFO L87 Difference]: Start difference. First operand 2175 states and 3078 transitions. Second operand 6 states. [2020-10-14 08:36:59,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:36:59,488 INFO L93 Difference]: Finished difference Result 9809 states and 13966 transitions. [2020-10-14 08:36:59,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 08:36:59,489 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 64 [2020-10-14 08:36:59,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:36:59,530 INFO L225 Difference]: With dead ends: 9809 [2020-10-14 08:36:59,531 INFO L226 Difference]: Without dead ends: 7659 [2020-10-14 08:36:59,539 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-14 08:36:59,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7659 states. [2020-10-14 08:37:00,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7659 to 5185. [2020-10-14 08:37:00,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5185 states. [2020-10-14 08:37:00,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5185 states to 5185 states and 7288 transitions. [2020-10-14 08:37:00,199 INFO L78 Accepts]: Start accepts. Automaton has 5185 states and 7288 transitions. Word has length 64 [2020-10-14 08:37:00,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:37:00,199 INFO L479 AbstractCegarLoop]: Abstraction has 5185 states and 7288 transitions. [2020-10-14 08:37:00,199 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 08:37:00,199 INFO L276 IsEmpty]: Start isEmpty. Operand 5185 states and 7288 transitions. [2020-10-14 08:37:00,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-14 08:37:00,201 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:37:00,201 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 08:37:00,202 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-14 08:37:00,202 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:37:00,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:37:00,202 INFO L82 PathProgramCache]: Analyzing trace with hash -1036613366, now seen corresponding path program 1 times [2020-10-14 08:37:00,202 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:37:00,203 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1496387911] [2020-10-14 08:37:00,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:37:00,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:37:00,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:37:00,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:37:00,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:37:00,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:37:00,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:37:01,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:37:02,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:37:02,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:37:02,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:37:03,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:37:03,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:37:03,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:37:04,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:37:04,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:37:05,229 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:37:05,229 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-14 08:37:05,230 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-14 08:37:05,230 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-14 08:37:05,230 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:37:05,230 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:37:05,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 08:37:05,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-14 08:37:05,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-14 08:37:05,231 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:37:05,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:37:05,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:37:05,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:37:05,364 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:37:05,365 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:37:05,365 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:37:05,365 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-14 08:37:05,365 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:37:05,366 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:37:05,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:37:05,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:37:05,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:37:05,367 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:37:05,378 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-14 08:37:05,379 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1496387911] [2020-10-14 08:37:05,379 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 08:37:05,379 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-14 08:37:05,380 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562929795] [2020-10-14 08:37:05,380 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 08:37:05,381 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:37:05,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 08:37:05,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 08:37:05,381 INFO L87 Difference]: Start difference. First operand 5185 states and 7288 transitions. Second operand 6 states. [2020-10-14 08:37:05,520 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2020-10-14 08:37:07,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:37:07,017 INFO L93 Difference]: Finished difference Result 14119 states and 19823 transitions. [2020-10-14 08:37:07,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 08:37:07,018 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 64 [2020-10-14 08:37:07,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:37:07,085 INFO L225 Difference]: With dead ends: 14119 [2020-10-14 08:37:07,085 INFO L226 Difference]: Without dead ends: 11107 [2020-10-14 08:37:07,101 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-14 08:37:07,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11107 states. [2020-10-14 08:37:08,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11107 to 8411. [2020-10-14 08:37:08,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8411 states. [2020-10-14 08:37:08,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8411 states to 8411 states and 11770 transitions. [2020-10-14 08:37:08,034 INFO L78 Accepts]: Start accepts. Automaton has 8411 states and 11770 transitions. Word has length 64 [2020-10-14 08:37:08,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:37:08,034 INFO L479 AbstractCegarLoop]: Abstraction has 8411 states and 11770 transitions. [2020-10-14 08:37:08,034 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 08:37:08,034 INFO L276 IsEmpty]: Start isEmpty. Operand 8411 states and 11770 transitions. [2020-10-14 08:37:08,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-14 08:37:08,036 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:37:08,036 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 08:37:08,037 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-14 08:37:08,037 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:37:08,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:37:08,037 INFO L82 PathProgramCache]: Analyzing trace with hash -1432884482, now seen corresponding path program 1 times [2020-10-14 08:37:08,037 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:37:08,038 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1019367281] [2020-10-14 08:37:08,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:37:08,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:37:08,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:37:08,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:37:08,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:37:08,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:37:08,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:37:08,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:37:09,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:37:09,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:37:09,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:37:09,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:37:11,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:37:11,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:37:11,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:37:11,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:37:13,059 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:37:13,059 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-14 08:37:13,059 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-14 08:37:13,060 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-14 08:37:13,060 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:37:13,060 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:37:13,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 08:37:13,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-14 08:37:13,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-14 08:37:13,061 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:37:13,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:37:13,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:37:13,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:37:13,179 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:37:13,179 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:37:13,179 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:37:13,179 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 08:37:13,180 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:37:13,180 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:37:13,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:37:13,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:37:13,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:37:13,181 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:37:13,190 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 08:37:13,199 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1019367281] [2020-10-14 08:37:13,200 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 08:37:13,200 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-14 08:37:13,200 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017112931] [2020-10-14 08:37:13,201 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 08:37:13,201 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:37:13,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 08:37:13,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 08:37:13,202 INFO L87 Difference]: Start difference. First operand 8411 states and 11770 transitions. Second operand 6 states. [2020-10-14 08:37:13,441 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 95 [2020-10-14 08:37:14,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:37:14,438 INFO L93 Difference]: Finished difference Result 14001 states and 19746 transitions. [2020-10-14 08:37:14,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-14 08:37:14,439 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 64 [2020-10-14 08:37:14,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:37:14,472 INFO L225 Difference]: With dead ends: 14001 [2020-10-14 08:37:14,472 INFO L226 Difference]: Without dead ends: 11551 [2020-10-14 08:37:14,482 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-14 08:37:14,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11551 states. [2020-10-14 08:37:15,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11551 to 11051. [2020-10-14 08:37:15,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11051 states. [2020-10-14 08:37:15,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11051 states to 11051 states and 15610 transitions. [2020-10-14 08:37:15,502 INFO L78 Accepts]: Start accepts. Automaton has 11051 states and 15610 transitions. Word has length 64 [2020-10-14 08:37:15,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:37:15,503 INFO L479 AbstractCegarLoop]: Abstraction has 11051 states and 15610 transitions. [2020-10-14 08:37:15,503 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 08:37:15,503 INFO L276 IsEmpty]: Start isEmpty. Operand 11051 states and 15610 transitions. [2020-10-14 08:37:15,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-14 08:37:15,505 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:37:15,505 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 08:37:15,506 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-14 08:37:15,506 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:37:15,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:37:15,506 INFO L82 PathProgramCache]: Analyzing trace with hash 2004431101, now seen corresponding path program 1 times [2020-10-14 08:37:15,507 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:37:15,507 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [558971778] [2020-10-14 08:37:15,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:37:15,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:37:15,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:37:15,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:37:15,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:37:15,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:37:15,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:37:15,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:37:16,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:37:16,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:37:16,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:37:20,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:37:20,523 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:37:20,523 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-14 08:37:20,524 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-14 08:37:20,524 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-14 08:37:20,524 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:37:20,524 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:37:20,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 08:37:20,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 08:37:20,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-14 08:37:20,524 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:37:20,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:37:20,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:37:20,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:37:20,648 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:37:20,648 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:37:20,648 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:37:20,648 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 08:37:20,648 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:37:20,648 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:37:20,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:37:20,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:37:20,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:37:20,649 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:37:20,667 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-14 08:37:20,668 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [558971778] [2020-10-14 08:37:20,668 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 08:37:20,668 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-14 08:37:20,669 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020694040] [2020-10-14 08:37:20,669 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 08:37:20,669 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:37:20,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 08:37:20,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-14 08:37:20,670 INFO L87 Difference]: Start difference. First operand 11051 states and 15610 transitions. Second operand 5 states. [2020-10-14 08:37:22,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:37:22,081 INFO L93 Difference]: Finished difference Result 26789 states and 37873 transitions. [2020-10-14 08:37:22,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 08:37:22,081 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 65 [2020-10-14 08:37:22,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:37:22,120 INFO L225 Difference]: With dead ends: 26789 [2020-10-14 08:37:22,120 INFO L226 Difference]: Without dead ends: 17299 [2020-10-14 08:37:22,140 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-14 08:37:22,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17299 states. [2020-10-14 08:37:24,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17299 to 17295. [2020-10-14 08:37:24,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17295 states. [2020-10-14 08:37:24,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17295 states to 17295 states and 23966 transitions. [2020-10-14 08:37:24,230 INFO L78 Accepts]: Start accepts. Automaton has 17295 states and 23966 transitions. Word has length 65 [2020-10-14 08:37:24,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:37:24,231 INFO L479 AbstractCegarLoop]: Abstraction has 17295 states and 23966 transitions. [2020-10-14 08:37:24,231 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 08:37:24,231 INFO L276 IsEmpty]: Start isEmpty. Operand 17295 states and 23966 transitions. [2020-10-14 08:37:24,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-14 08:37:24,233 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:37:24,233 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 08:37:24,233 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-14 08:37:24,234 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:37:24,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:37:24,234 INFO L82 PathProgramCache]: Analyzing trace with hash -1970498434, now seen corresponding path program 1 times [2020-10-14 08:37:24,234 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:37:24,234 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2034418524] [2020-10-14 08:37:24,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:37:24,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:37:24,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:37:24,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:37:24,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:37:24,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:37:24,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:37:24,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:37:24,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:37:24,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:37:25,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:37:25,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:37:26,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:37:26,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:37:27,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:37:29,252 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:37:29,252 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-14 08:37:29,252 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-14 08:37:29,252 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-14 08:37:29,252 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:37:29,252 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:37:29,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 08:37:29,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-14 08:37:29,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-14 08:37:29,253 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:37:29,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:37:29,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:37:29,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:37:29,493 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:37:29,493 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:37:29,493 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:37:29,493 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-14 08:37:29,493 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:37:29,493 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:37:29,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:37:29,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:37:29,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-14 08:37:29,494 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:37:29,517 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 08:37:29,517 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2034418524] [2020-10-14 08:37:29,517 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 08:37:29,517 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 08:37:29,518 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754584431] [2020-10-14 08:37:29,518 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-14 08:37:29,518 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:37:29,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-14 08:37:29,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-10-14 08:37:29,519 INFO L87 Difference]: Start difference. First operand 17295 states and 23966 transitions. Second operand 11 states. [2020-10-14 08:37:34,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:37:34,934 INFO L93 Difference]: Finished difference Result 71901 states and 98208 transitions. [2020-10-14 08:37:34,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-14 08:37:34,934 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 66 [2020-10-14 08:37:34,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:37:35,031 INFO L225 Difference]: With dead ends: 71901 [2020-10-14 08:37:35,031 INFO L226 Difference]: Without dead ends: 54631 [2020-10-14 08:37:35,079 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=350, Invalid=982, Unknown=0, NotChecked=0, Total=1332 [2020-10-14 08:37:35,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54631 states. [2020-10-14 08:37:37,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54631 to 30001. [2020-10-14 08:37:37,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30001 states. [2020-10-14 08:37:37,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30001 states to 30001 states and 41358 transitions. [2020-10-14 08:37:37,951 INFO L78 Accepts]: Start accepts. Automaton has 30001 states and 41358 transitions. Word has length 66 [2020-10-14 08:37:37,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:37:37,951 INFO L479 AbstractCegarLoop]: Abstraction has 30001 states and 41358 transitions. [2020-10-14 08:37:37,952 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-14 08:37:37,952 INFO L276 IsEmpty]: Start isEmpty. Operand 30001 states and 41358 transitions. [2020-10-14 08:37:37,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-14 08:37:37,956 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:37:37,956 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 08:37:37,957 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-14 08:37:37,957 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:37:37,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:37:37,957 INFO L82 PathProgramCache]: Analyzing trace with hash 95078741, now seen corresponding path program 1 times [2020-10-14 08:37:37,957 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:37:37,958 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1589174853] [2020-10-14 08:37:37,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:37:37,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:37:37,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:37:38,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:37:38,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:37:38,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:37:38,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:37:38,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:37:39,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:37:39,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:37:39,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:37:39,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:37:39,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:37:40,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:37:41,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:37:41,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:37:42,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:37:42,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:37:42,984 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:37:42,984 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-14 08:37:42,984 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-14 08:37:42,984 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-14 08:37:42,984 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:37:42,985 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:37:42,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-14 08:37:42,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 08:37:42,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-14 08:37:42,985 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:37:43,201 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 23 [2020-10-14 08:37:43,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:37:43,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:37:43,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:37:43,319 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:37:43,320 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:37:43,320 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:37:43,320 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 08:37:43,320 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:37:43,320 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:37:43,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:37:43,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:37:43,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:37:43,321 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:37:43,335 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 08:37:43,335 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1589174853] [2020-10-14 08:37:43,335 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 08:37:43,335 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-14 08:37:43,336 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84688244] [2020-10-14 08:37:43,336 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-14 08:37:43,336 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:37:43,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-14 08:37:43,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-14 08:37:43,337 INFO L87 Difference]: Start difference. First operand 30001 states and 41358 transitions. Second operand 11 states. [2020-10-14 08:38:03,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:38:03,524 INFO L93 Difference]: Finished difference Result 201545 states and 274784 transitions. [2020-10-14 08:38:03,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-14 08:38:03,525 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 66 [2020-10-14 08:38:03,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:38:03,809 INFO L225 Difference]: With dead ends: 201545 [2020-10-14 08:38:03,810 INFO L226 Difference]: Without dead ends: 175524 [2020-10-14 08:38:03,918 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 684 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=417, Invalid=1935, Unknown=0, NotChecked=0, Total=2352 [2020-10-14 08:38:04,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175524 states. [2020-10-14 08:38:14,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175524 to 77201. [2020-10-14 08:38:14,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77201 states. [2020-10-14 08:38:14,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77201 states to 77201 states and 106112 transitions. [2020-10-14 08:38:14,220 INFO L78 Accepts]: Start accepts. Automaton has 77201 states and 106112 transitions. Word has length 66 [2020-10-14 08:38:14,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:38:14,221 INFO L479 AbstractCegarLoop]: Abstraction has 77201 states and 106112 transitions. [2020-10-14 08:38:14,221 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-14 08:38:14,221 INFO L276 IsEmpty]: Start isEmpty. Operand 77201 states and 106112 transitions. [2020-10-14 08:38:14,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-14 08:38:14,224 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:38:14,224 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 08:38:14,224 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-14 08:38:14,224 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:38:14,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:38:14,225 INFO L82 PathProgramCache]: Analyzing trace with hash -1420019825, now seen corresponding path program 1 times [2020-10-14 08:38:14,225 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:38:14,225 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1315273427] [2020-10-14 08:38:14,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:38:14,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:38:14,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:38:14,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:38:14,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:38:14,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:38:14,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:38:14,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:38:14,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:38:14,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:38:14,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:38:15,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:38:15,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:38:15,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:38:17,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:38:17,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:38:18,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:38:18,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:38:19,236 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:38:19,236 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-14 08:38:19,236 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-14 08:38:19,236 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-14 08:38:19,237 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:38:19,237 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:38:19,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 08:38:19,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 08:38:19,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-14 08:38:19,237 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:38:19,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:38:19,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:38:19,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:38:19,532 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:38:19,532 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:38:19,532 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:38:19,532 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 08:38:19,533 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:38:19,533 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:38:19,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:38:19,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:38:19,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:38:19,533 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:38:19,548 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 08:38:19,548 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1315273427] [2020-10-14 08:38:19,548 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 08:38:19,549 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 08:38:19,549 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453275711] [2020-10-14 08:38:19,549 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 08:38:19,549 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:38:19,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 08:38:19,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-14 08:38:19,550 INFO L87 Difference]: Start difference. First operand 77201 states and 106112 transitions. Second operand 10 states. [2020-10-14 08:38:36,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:38:36,410 INFO L93 Difference]: Finished difference Result 185990 states and 253264 transitions. [2020-10-14 08:38:36,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-14 08:38:36,410 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 66 [2020-10-14 08:38:36,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:38:36,625 INFO L225 Difference]: With dead ends: 185990 [2020-10-14 08:38:36,625 INFO L226 Difference]: Without dead ends: 138107 [2020-10-14 08:38:36,704 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=174, Invalid=476, Unknown=0, NotChecked=0, Total=650 [2020-10-14 08:38:36,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138107 states. [2020-10-14 08:38:48,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138107 to 78233. [2020-10-14 08:38:48,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78233 states. [2020-10-14 08:38:48,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78233 states to 78233 states and 107660 transitions. [2020-10-14 08:38:48,615 INFO L78 Accepts]: Start accepts. Automaton has 78233 states and 107660 transitions. Word has length 66 [2020-10-14 08:38:48,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:38:48,615 INFO L479 AbstractCegarLoop]: Abstraction has 78233 states and 107660 transitions. [2020-10-14 08:38:48,615 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 08:38:48,615 INFO L276 IsEmpty]: Start isEmpty. Operand 78233 states and 107660 transitions. [2020-10-14 08:38:48,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-14 08:38:48,618 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:38:48,618 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 08:38:48,618 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-14 08:38:48,618 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:38:48,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:38:48,618 INFO L82 PathProgramCache]: Analyzing trace with hash 1350451652, now seen corresponding path program 1 times [2020-10-14 08:38:48,619 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:38:48,619 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1157269727] [2020-10-14 08:38:48,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:38:48,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:38:48,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:38:48,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:38:48,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:38:48,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:38:48,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:38:50,257 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:38:50,257 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-14 08:38:50,258 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 08:38:50,258 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1623 [2020-10-14 08:38:50,258 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:38:50,258 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:38:50,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-14 08:38:50,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 08:38:50,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-14 08:38:50,259 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:38:50,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:38:50,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:38:50,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:38:50,618 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:38:50,618 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:38:50,618 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:38:50,618 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 08:38:50,618 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:38:50,618 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:38:50,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:38:50,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:38:50,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:38:50,619 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:38:50,634 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 08:38:50,634 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1157269727] [2020-10-14 08:38:50,634 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-14 08:38:50,634 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-14 08:38:50,635 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044292566] [2020-10-14 08:38:50,635 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-14 08:38:50,635 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:38:50,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-14 08:38:50,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-14 08:38:50,636 INFO L87 Difference]: Start difference. First operand 78233 states and 107660 transitions. Second operand 10 states. [2020-10-14 08:38:50,993 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2020-10-14 08:39:26,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:39:26,173 INFO L93 Difference]: Finished difference Result 295799 states and 403801 transitions. [2020-10-14 08:39:26,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-14 08:39:26,174 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 67 [2020-10-14 08:39:26,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:39:26,537 INFO L225 Difference]: With dead ends: 295799 [2020-10-14 08:39:26,537 INFO L226 Difference]: Without dead ends: 241407 [2020-10-14 08:39:26,637 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=191, Invalid=511, Unknown=0, NotChecked=0, Total=702 [2020-10-14 08:39:26,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241407 states. [2020-10-14 08:39:44,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241407 to 132112. [2020-10-14 08:39:44,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132112 states. [2020-10-14 08:39:44,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132112 states to 132112 states and 182491 transitions. [2020-10-14 08:39:44,208 INFO L78 Accepts]: Start accepts. Automaton has 132112 states and 182491 transitions. Word has length 67 [2020-10-14 08:39:44,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:39:44,208 INFO L479 AbstractCegarLoop]: Abstraction has 132112 states and 182491 transitions. [2020-10-14 08:39:44,208 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-14 08:39:44,208 INFO L276 IsEmpty]: Start isEmpty. Operand 132112 states and 182491 transitions. [2020-10-14 08:39:44,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-14 08:39:44,210 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:39:44,211 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 08:39:44,211 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-14 08:39:44,211 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:39:44,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:39:44,211 INFO L82 PathProgramCache]: Analyzing trace with hash 100191498, now seen corresponding path program 1 times [2020-10-14 08:39:44,211 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:39:44,211 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1941481054] [2020-10-14 08:39:44,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:39:44,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:39:44,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:39:44,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:39:44,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:39:44,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:39:44,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:39:45,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:39:45,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:39:45,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:39:45,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:39:45,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:39:45,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:39:45,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:39:51,069 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:39:51,070 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-14 08:39:51,070 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-14 08:39:51,070 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6847 [2020-10-14 08:39:51,070 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:39:51,070 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:39:51,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:39:51,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-14 08:39:51,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-14 08:39:51,071 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:39:51,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:39:51,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:39:51,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:39:51,179 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:39:51,179 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:39:51,179 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:39:51,179 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-14 08:39:51,179 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:39:51,179 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:39:51,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:39:51,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:39:51,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:39:51,180 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:39:51,187 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 08:39:51,187 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1941481054] [2020-10-14 08:39:51,187 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:39:51,187 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 08:39:51,188 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49832473] [2020-10-14 08:39:51,188 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 08:39:51,188 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:39:51,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 08:39:51,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:39:51,189 INFO L87 Difference]: Start difference. First operand 132112 states and 182491 transitions. Second operand 4 states.