/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=NARROWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.6.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 14:53:39,002 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 14:53:39,005 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 14:53:39,047 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 14:53:39,048 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 14:53:39,056 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 14:53:39,058 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 14:53:39,062 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 14:53:39,064 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 14:53:39,067 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 14:53:39,068 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 14:53:39,069 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 14:53:39,069 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 14:53:39,071 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 14:53:39,074 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 14:53:39,076 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 14:53:39,077 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 14:53:39,078 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 14:53:39,079 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 14:53:39,087 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 14:53:39,090 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 14:53:39,090 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 14:53:39,091 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 14:53:39,092 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 14:53:39,107 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 14:53:39,108 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 14:53:39,108 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 14:53:39,109 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 14:53:39,109 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 14:53:39,110 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 14:53:39,110 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 14:53:39,111 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 14:53:39,111 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 14:53:39,112 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 14:53:39,113 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 14:53:39,113 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 14:53:39,113 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 14:53:39,114 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 14:53:39,114 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 14:53:39,115 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 14:53:39,115 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 14:53:39,116 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-13 14:53:39,140 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 14:53:39,140 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 14:53:39,141 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 14:53:39,141 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 14:53:39,142 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 14:53:39,142 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 14:53:39,142 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 14:53:39,142 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 14:53:39,143 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 14:53:39,143 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 14:53:39,143 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 14:53:39,143 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 14:53:39,143 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 14:53:39,143 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 14:53:39,144 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 14:53:39,144 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 14:53:39,144 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 14:53:39,144 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 14:53:39,144 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 14:53:39,145 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 14:53:39,145 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 14:53:39,145 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 14:53:39,145 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 14:53:39,145 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 14:53:39,146 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 14:53:39,146 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 14:53:39,146 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 14:53:39,146 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 14:53:39,146 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 14:53:39,146 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; [2020-10-13 14:53:39,474 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 14:53:39,494 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 14:53:39,502 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 14:53:39,503 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 14:53:39,503 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 14:53:39,504 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.6.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-13 14:53:39,581 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c0d08a2e8/bb034b9616b94a7788dcfc9261df168b/FLAG89cdfa73d [2020-10-13 14:53:40,074 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 14:53:40,074 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.6.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-13 14:53:40,086 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c0d08a2e8/bb034b9616b94a7788dcfc9261df168b/FLAG89cdfa73d [2020-10-13 14:53:40,404 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c0d08a2e8/bb034b9616b94a7788dcfc9261df168b [2020-10-13 14:53:40,413 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 14:53:40,415 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 14:53:40,416 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 14:53:40,416 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 14:53:40,422 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 14:53:40,423 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 02:53:40" (1/1) ... [2020-10-13 14:53:40,426 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7438b5a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:53:40, skipping insertion in model container [2020-10-13 14:53:40,426 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 02:53:40" (1/1) ... [2020-10-13 14:53:40,434 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 14:53:40,478 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 14:53:40,800 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 14:53:40,830 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 14:53:41,014 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 14:53:41,035 INFO L208 MainTranslator]: Completed translation [2020-10-13 14:53:41,036 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:53:41 WrapperNode [2020-10-13 14:53:41,036 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 14:53:41,037 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 14:53:41,037 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 14:53:41,037 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 14:53:41,051 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:53:41" (1/1) ... [2020-10-13 14:53:41,052 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:53:41" (1/1) ... [2020-10-13 14:53:41,067 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:53:41" (1/1) ... [2020-10-13 14:53:41,067 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:53:41" (1/1) ... [2020-10-13 14:53:41,084 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:53:41" (1/1) ... [2020-10-13 14:53:41,095 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:53:41" (1/1) ... [2020-10-13 14:53:41,099 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:53:41" (1/1) ... [2020-10-13 14:53:41,104 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 14:53:41,105 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 14:53:41,105 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 14:53:41,105 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 14:53:41,106 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:53:41" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 14:53:41,182 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 14:53:41,183 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 14:53:41,183 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-13 14:53:41,183 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 14:53:41,183 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 14:53:41,183 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-13 14:53:41,184 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-13 14:53:41,184 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-13 14:53:41,184 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-13 14:53:41,184 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-13 14:53:41,184 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-13 14:53:41,184 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-13 14:53:41,185 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-13 14:53:41,185 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-13 14:53:41,185 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-13 14:53:41,188 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-13 14:53:41,188 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-13 14:53:41,188 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-10-13 14:53:41,188 INFO L130 BoogieDeclarations]: Found specification of procedure node6 [2020-10-13 14:53:41,188 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-13 14:53:41,189 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-13 14:53:41,189 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 14:53:41,190 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 14:53:41,190 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 14:53:42,016 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 14:53:42,017 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-13 14:53:42,022 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 02:53:42 BoogieIcfgContainer [2020-10-13 14:53:42,022 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 14:53:42,024 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 14:53:42,024 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 14:53:42,027 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 14:53:42,027 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 02:53:40" (1/3) ... [2020-10-13 14:53:42,028 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d7aa94b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 02:53:42, skipping insertion in model container [2020-10-13 14:53:42,029 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:53:41" (2/3) ... [2020-10-13 14:53:42,029 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d7aa94b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 02:53:42, skipping insertion in model container [2020-10-13 14:53:42,029 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 02:53:42" (3/3) ... [2020-10-13 14:53:42,031 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.6.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-13 14:53:42,041 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 14:53:42,049 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 14:53:42,062 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 14:53:42,086 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 14:53:42,086 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 14:53:42,086 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 14:53:42,086 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 14:53:42,086 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 14:53:42,087 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 14:53:42,087 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 14:53:42,087 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 14:53:42,109 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states. [2020-10-13 14:53:42,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-13 14:53:42,119 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:53:42,121 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:53:42,121 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:53:42,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:53:42,128 INFO L82 PathProgramCache]: Analyzing trace with hash 548589956, now seen corresponding path program 1 times [2020-10-13 14:53:42,137 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:53:42,137 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [319305688] [2020-10-13 14:53:42,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:53:42,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:53:42,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:53:42,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:53:42,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:53:43,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:53:43,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:53:43,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:53:47,436 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:53:47,437 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-13 14:53:47,438 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 14:53:47,438 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-13 14:53:47,441 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:53:47,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:53:47,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 37 [2020-10-13 14:53:47,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-13 14:53:47,443 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-13 14:53:47,788 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-13 14:53:47,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:53:47,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:53:47,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:53:47,827 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:53:47,828 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:53:47,828 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:53:47,828 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-13 14:53:47,828 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:53:47,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:53:47,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:53:47,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:53:47,829 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:53:47,873 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:53:47,874 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [319305688] [2020-10-13 14:53:47,877 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:53:47,877 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:53:47,878 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831175429] [2020-10-13 14:53:47,885 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:53:47,885 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:53:47,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:53:47,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:53:47,903 INFO L87 Difference]: Start difference. First operand 170 states. Second operand 4 states. [2020-10-13 14:53:48,201 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-13 14:53:49,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:53:49,180 INFO L93 Difference]: Finished difference Result 398 states and 640 transitions. [2020-10-13 14:53:49,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:53:49,182 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 78 [2020-10-13 14:53:49,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:53:49,197 INFO L225 Difference]: With dead ends: 398 [2020-10-13 14:53:49,197 INFO L226 Difference]: Without dead ends: 268 [2020-10-13 14:53:49,202 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:53:49,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2020-10-13 14:53:49,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 266. [2020-10-13 14:53:49,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 266 states. [2020-10-13 14:53:49,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 396 transitions. [2020-10-13 14:53:49,267 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 396 transitions. Word has length 78 [2020-10-13 14:53:49,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:53:49,268 INFO L479 AbstractCegarLoop]: Abstraction has 266 states and 396 transitions. [2020-10-13 14:53:49,268 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:53:49,268 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 396 transitions. [2020-10-13 14:53:49,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-13 14:53:49,272 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:53:49,272 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:53:49,272 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 14:53:49,272 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:53:49,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:53:49,273 INFO L82 PathProgramCache]: Analyzing trace with hash 478270724, now seen corresponding path program 1 times [2020-10-13 14:53:49,273 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:53:49,273 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1890573004] [2020-10-13 14:53:49,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:53:49,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:53:49,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:53:49,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:53:49,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:53:49,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:53:49,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:53:52,761 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:53:52,762 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-13 14:53:52,762 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 14:53:52,763 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3456 [2020-10-13 14:53:52,763 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:53:52,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:53:52,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-13 14:53:52,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-13 14:53:52,765 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:53:53,025 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-13 14:53:53,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:53:53,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:53:53,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:53:53,058 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:53:53,058 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:53:53,059 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:53:53,059 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-13 14:53:53,060 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:53:53,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:53:53,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:53:53,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:53:53,061 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:53:53,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:53:53,096 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1890573004] [2020-10-13 14:53:53,096 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:53:53,097 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:53:53,097 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554376562] [2020-10-13 14:53:53,099 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:53:53,100 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:53:53,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:53:53,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:53:53,101 INFO L87 Difference]: Start difference. First operand 266 states and 396 transitions. Second operand 4 states. [2020-10-13 14:53:53,345 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-13 14:53:54,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:53:54,166 INFO L93 Difference]: Finished difference Result 670 states and 1040 transitions. [2020-10-13 14:53:54,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:53:54,167 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 79 [2020-10-13 14:53:54,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:53:54,172 INFO L225 Difference]: With dead ends: 670 [2020-10-13 14:53:54,172 INFO L226 Difference]: Without dead ends: 452 [2020-10-13 14:53:54,174 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:53:54,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2020-10-13 14:53:54,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 450. [2020-10-13 14:53:54,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 450 states. [2020-10-13 14:53:54,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 689 transitions. [2020-10-13 14:53:54,215 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 689 transitions. Word has length 79 [2020-10-13 14:53:54,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:53:54,215 INFO L479 AbstractCegarLoop]: Abstraction has 450 states and 689 transitions. [2020-10-13 14:53:54,216 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:53:54,216 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 689 transitions. [2020-10-13 14:53:54,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-13 14:53:54,219 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:53:54,219 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:53:54,219 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 14:53:54,219 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:53:54,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:53:54,220 INFO L82 PathProgramCache]: Analyzing trace with hash -311766548, now seen corresponding path program 1 times [2020-10-13 14:53:54,220 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:53:54,220 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1706567902] [2020-10-13 14:53:54,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:53:54,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:53:54,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:53:54,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:53:54,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:53:54,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:53:55,758 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:53:55,759 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-13 14:53:55,759 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 14:53:55,759 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1509 [2020-10-13 14:53:55,759 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:53:55,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:53:55,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-13 14:53:55,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-13 14:53:55,760 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:53:56,044 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-13 14:53:56,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:53:56,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:53:56,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:53:56,064 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:53:56,065 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:53:56,065 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:53:56,065 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-13 14:53:56,066 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:53:56,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:53:56,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:53:56,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:53:56,066 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:53:56,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:53:56,093 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1706567902] [2020-10-13 14:53:56,093 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:53:56,093 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:53:56,094 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249569428] [2020-10-13 14:53:56,094 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:53:56,095 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:53:56,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:53:56,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:53:56,096 INFO L87 Difference]: Start difference. First operand 450 states and 689 transitions. Second operand 4 states. [2020-10-13 14:53:56,304 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-13 14:53:57,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:53:57,144 INFO L93 Difference]: Finished difference Result 1190 states and 1867 transitions. [2020-10-13 14:53:57,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:53:57,144 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 80 [2020-10-13 14:53:57,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:53:57,149 INFO L225 Difference]: With dead ends: 1190 [2020-10-13 14:53:57,150 INFO L226 Difference]: Without dead ends: 788 [2020-10-13 14:53:57,153 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:53:57,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 788 states. [2020-10-13 14:53:57,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 788 to 786. [2020-10-13 14:53:57,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 786 states. [2020-10-13 14:53:57,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 786 states to 786 states and 1221 transitions. [2020-10-13 14:53:57,209 INFO L78 Accepts]: Start accepts. Automaton has 786 states and 1221 transitions. Word has length 80 [2020-10-13 14:53:57,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:53:57,209 INFO L479 AbstractCegarLoop]: Abstraction has 786 states and 1221 transitions. [2020-10-13 14:53:57,210 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:53:57,210 INFO L276 IsEmpty]: Start isEmpty. Operand 786 states and 1221 transitions. [2020-10-13 14:53:57,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-13 14:53:57,213 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:53:57,213 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:53:57,213 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 14:53:57,214 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:53:57,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:53:57,214 INFO L82 PathProgramCache]: Analyzing trace with hash 164800175, now seen corresponding path program 1 times [2020-10-13 14:53:57,214 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:53:57,215 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [853833399] [2020-10-13 14:53:57,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:53:57,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:53:57,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:53:57,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:53:57,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:53:58,115 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:53:58,116 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-13 14:53:58,116 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 14:53:58,116 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 874 [2020-10-13 14:53:58,116 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:53:58,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:53:58,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-13 14:53:58,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-13 14:53:58,117 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:53:58,293 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-13 14:53:58,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:53:58,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:53:58,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:53:58,312 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:53:58,312 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:53:58,313 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:53:58,313 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-13 14:53:58,313 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:53:58,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:53:58,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:53:58,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:53:58,314 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:53:58,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:53:58,338 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [853833399] [2020-10-13 14:53:58,338 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:53:58,338 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:53:58,339 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730643093] [2020-10-13 14:53:58,340 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:53:58,340 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:53:58,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:53:58,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:53:58,341 INFO L87 Difference]: Start difference. First operand 786 states and 1221 transitions. Second operand 4 states. [2020-10-13 14:53:58,512 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-13 14:53:59,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:53:59,445 INFO L93 Difference]: Finished difference Result 2134 states and 3359 transitions. [2020-10-13 14:53:59,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:53:59,446 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 81 [2020-10-13 14:53:59,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:53:59,458 INFO L225 Difference]: With dead ends: 2134 [2020-10-13 14:53:59,458 INFO L226 Difference]: Without dead ends: 1396 [2020-10-13 14:53:59,462 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 [2020-10-13 14:53:59,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1396 states. [2020-10-13 14:53:59,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1396 to 1394. [2020-10-13 14:53:59,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1394 states. [2020-10-13 14:53:59,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1394 states to 1394 states and 2177 transitions. [2020-10-13 14:53:59,572 INFO L78 Accepts]: Start accepts. Automaton has 1394 states and 2177 transitions. Word has length 81 [2020-10-13 14:53:59,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:53:59,575 INFO L479 AbstractCegarLoop]: Abstraction has 1394 states and 2177 transitions. [2020-10-13 14:53:59,575 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:53:59,575 INFO L276 IsEmpty]: Start isEmpty. Operand 1394 states and 2177 transitions. [2020-10-13 14:53:59,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-13 14:53:59,588 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:53:59,589 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:53:59,589 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 14:53:59,590 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:53:59,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:53:59,590 INFO L82 PathProgramCache]: Analyzing trace with hash -1198747305, now seen corresponding path program 1 times [2020-10-13 14:53:59,591 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:53:59,591 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1431696418] [2020-10-13 14:53:59,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:53:59,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:53:59,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:53:59,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:54:00,260 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:54:00,260 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-13 14:54:00,261 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 14:54:00,261 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 626 [2020-10-13 14:54:00,261 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:54:00,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:54:00,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-13 14:54:00,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-13 14:54:00,262 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:54:00,554 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-13 14:54:00,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:54:00,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:54:00,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:54:00,575 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:54:00,576 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:54:00,576 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:54:00,577 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-13 14:54:00,577 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:54:00,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:54:00,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:54:00,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:54:00,578 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:54:00,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:54:00,606 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1431696418] [2020-10-13 14:54:00,606 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:54:00,607 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:54:00,607 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993327587] [2020-10-13 14:54:00,608 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:54:00,608 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:54:00,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:54:00,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:54:00,609 INFO L87 Difference]: Start difference. First operand 1394 states and 2177 transitions. Second operand 4 states. [2020-10-13 14:54:00,823 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-13 14:54:01,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:54:01,832 INFO L93 Difference]: Finished difference Result 3830 states and 6019 transitions. [2020-10-13 14:54:01,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:54:01,833 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 82 [2020-10-13 14:54:01,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:54:01,847 INFO L225 Difference]: With dead ends: 3830 [2020-10-13 14:54:01,847 INFO L226 Difference]: Without dead ends: 2484 [2020-10-13 14:54:01,851 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:54:01,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2484 states. [2020-10-13 14:54:01,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2484 to 2482. [2020-10-13 14:54:01,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2482 states. [2020-10-13 14:54:01,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2482 states to 2482 states and 3873 transitions. [2020-10-13 14:54:01,993 INFO L78 Accepts]: Start accepts. Automaton has 2482 states and 3873 transitions. Word has length 82 [2020-10-13 14:54:01,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:54:01,995 INFO L479 AbstractCegarLoop]: Abstraction has 2482 states and 3873 transitions. [2020-10-13 14:54:01,995 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:54:01,995 INFO L276 IsEmpty]: Start isEmpty. Operand 2482 states and 3873 transitions. [2020-10-13 14:54:01,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-13 14:54:01,997 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:54:01,998 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:54:01,998 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 14:54:01,998 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:54:01,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:54:01,999 INFO L82 PathProgramCache]: Analyzing trace with hash 1474064346, now seen corresponding path program 1 times [2020-10-13 14:54:01,999 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:54:02,000 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [913302725] [2020-10-13 14:54:02,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:54:02,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:54:02,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:54:02,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:54:03,414 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:54:03,414 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-13 14:54:03,415 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 14:54:03,415 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1373 [2020-10-13 14:54:03,415 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:54:03,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 14:54:03,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 14:54:03,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-13 14:54:03,416 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:54:03,739 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-13 14:54:03,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:54:03,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:54:03,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:54:03,755 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:54:03,756 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:54:03,756 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:54:03,756 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-13 14:54:03,756 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:54:03,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:54:03,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:54:03,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:54:03,757 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:54:03,823 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:54:03,823 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [913302725] [2020-10-13 14:54:03,823 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:54:03,824 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-13 14:54:03,824 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523634659] [2020-10-13 14:54:03,824 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 14:54:03,825 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:54:03,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 14:54:03,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-13 14:54:03,825 INFO L87 Difference]: Start difference. First operand 2482 states and 3873 transitions. Second operand 9 states. [2020-10-13 14:54:06,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:54:06,359 INFO L93 Difference]: Finished difference Result 15086 states and 23527 transitions. [2020-10-13 14:54:06,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 14:54:06,359 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 83 [2020-10-13 14:54:06,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:54:06,419 INFO L225 Difference]: With dead ends: 15086 [2020-10-13 14:54:06,420 INFO L226 Difference]: Without dead ends: 12652 [2020-10-13 14:54:06,428 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-13 14:54:06,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12652 states. [2020-10-13 14:54:07,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12652 to 12642. [2020-10-13 14:54:07,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12642 states. [2020-10-13 14:54:07,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12642 states to 12642 states and 19665 transitions. [2020-10-13 14:54:07,091 INFO L78 Accepts]: Start accepts. Automaton has 12642 states and 19665 transitions. Word has length 83 [2020-10-13 14:54:07,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:54:07,092 INFO L479 AbstractCegarLoop]: Abstraction has 12642 states and 19665 transitions. [2020-10-13 14:54:07,092 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 14:54:07,092 INFO L276 IsEmpty]: Start isEmpty. Operand 12642 states and 19665 transitions. [2020-10-13 14:54:07,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-13 14:54:07,093 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:54:07,093 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:54:07,094 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 14:54:07,094 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:54:07,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:54:07,094 INFO L82 PathProgramCache]: Analyzing trace with hash -1276707276, now seen corresponding path program 1 times [2020-10-13 14:54:07,095 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:54:07,096 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [427227374] [2020-10-13 14:54:07,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:54:07,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:54:07,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:54:07,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:54:07,696 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:54:07,696 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-13 14:54:07,696 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 14:54:07,696 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 561 [2020-10-13 14:54:07,697 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:54:07,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:54:07,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-13 14:54:07,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-13 14:54:07,697 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:54:07,944 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-13 14:54:07,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:54:07,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:54:07,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:54:07,961 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:54:07,962 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:54:07,962 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:54:07,962 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-13 14:54:07,962 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:54:07,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:54:07,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:54:07,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:54:07,963 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:54:07,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:54:07,984 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [427227374] [2020-10-13 14:54:07,984 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:54:07,984 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:54:07,985 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610207020] [2020-10-13 14:54:07,985 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:54:07,985 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:54:07,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:54:07,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:54:07,986 INFO L87 Difference]: Start difference. First operand 12642 states and 19665 transitions. Second operand 4 states. [2020-10-13 14:54:08,178 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-13 14:54:10,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:54:10,343 INFO L93 Difference]: Finished difference Result 34534 states and 53587 transitions. [2020-10-13 14:54:10,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:54:10,343 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 84 [2020-10-13 14:54:10,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:54:10,407 INFO L225 Difference]: With dead ends: 34534 [2020-10-13 14:54:10,407 INFO L226 Difference]: Without dead ends: 21940 [2020-10-13 14:54:10,432 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:54:10,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21940 states. [2020-10-13 14:54:11,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21940 to 21938. [2020-10-13 14:54:11,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21938 states. [2020-10-13 14:54:11,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21938 states to 21938 states and 33777 transitions. [2020-10-13 14:54:11,491 INFO L78 Accepts]: Start accepts. Automaton has 21938 states and 33777 transitions. Word has length 84 [2020-10-13 14:54:11,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:54:11,492 INFO L479 AbstractCegarLoop]: Abstraction has 21938 states and 33777 transitions. [2020-10-13 14:54:11,492 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:54:11,492 INFO L276 IsEmpty]: Start isEmpty. Operand 21938 states and 33777 transitions. [2020-10-13 14:54:11,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-13 14:54:11,493 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:54:11,494 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:54:11,494 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 14:54:11,494 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:54:11,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:54:11,494 INFO L82 PathProgramCache]: Analyzing trace with hash 1279994641, now seen corresponding path program 1 times [2020-10-13 14:54:11,495 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:54:11,495 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [704262651] [2020-10-13 14:54:11,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:54:11,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:54:11,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:54:11,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:54:12,202 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:54:12,203 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-13 14:54:12,203 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 14:54:12,203 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 686 [2020-10-13 14:54:12,204 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:54:12,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 14:54:12,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 14:54:12,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-13 14:54:12,205 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:54:12,554 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-13 14:54:12,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:54:12,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:54:12,566 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:54:12,580 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:54:12,581 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:54:12,581 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:54:12,582 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-13 14:54:12,582 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:54:12,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:54:12,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:54:12,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 14:54:12,582 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:54:12,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:54:12,608 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [704262651] [2020-10-13 14:54:12,609 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:54:12,609 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:54:12,609 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612474132] [2020-10-13 14:54:12,610 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 14:54:12,610 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:54:12,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 14:54:12,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:54:12,610 INFO L87 Difference]: Start difference. First operand 21938 states and 33777 transitions. Second operand 6 states. [2020-10-13 14:54:12,814 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-13 14:54:15,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:54:15,683 INFO L93 Difference]: Finished difference Result 65398 states and 100595 transitions. [2020-10-13 14:54:15,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 14:54:15,684 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 85 [2020-10-13 14:54:15,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:54:15,794 INFO L225 Difference]: With dead ends: 65398 [2020-10-13 14:54:15,794 INFO L226 Difference]: Without dead ends: 43508 [2020-10-13 14:54:15,833 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-13 14:54:15,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43508 states. [2020-10-13 14:54:17,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43508 to 43506. [2020-10-13 14:54:17,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43506 states. [2020-10-13 14:54:17,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43506 states to 43506 states and 66545 transitions. [2020-10-13 14:54:17,775 INFO L78 Accepts]: Start accepts. Automaton has 43506 states and 66545 transitions. Word has length 85 [2020-10-13 14:54:17,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:54:17,775 INFO L479 AbstractCegarLoop]: Abstraction has 43506 states and 66545 transitions. [2020-10-13 14:54:17,775 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 14:54:17,775 INFO L276 IsEmpty]: Start isEmpty. Operand 43506 states and 66545 transitions. [2020-10-13 14:54:17,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-13 14:54:17,776 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:54:17,777 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:54:17,777 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 14:54:17,777 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:54:17,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:54:17,777 INFO L82 PathProgramCache]: Analyzing trace with hash -1397467764, now seen corresponding path program 1 times [2020-10-13 14:54:17,778 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:54:17,778 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [927457322] [2020-10-13 14:54:17,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:54:17,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:54:17,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:54:18,133 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:54:18,133 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-13 14:54:18,133 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:54:18,133 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 322 [2020-10-13 14:54:18,134 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:54:18,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 14:54:18,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 14:54:18,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-10-13 14:54:18,134 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:54:18,418 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-13 14:54:18,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:54:18,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:54:18,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:54:18,431 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:54:18,431 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:54:18,431 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:54:18,432 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 14:54:18,432 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:54:18,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:54:18,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:54:18,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:54:18,432 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:54:18,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:54:18,460 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [927457322] [2020-10-13 14:54:18,460 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:54:18,460 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-13 14:54:18,461 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992874454] [2020-10-13 14:54:18,461 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 14:54:18,462 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:54:18,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 14:54:18,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-13 14:54:18,462 INFO L87 Difference]: Start difference. First operand 43506 states and 66545 transitions. Second operand 9 states. [2020-10-13 14:54:18,764 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-13 14:54:28,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:54:28,830 INFO L93 Difference]: Finished difference Result 245664 states and 376280 transitions. [2020-10-13 14:54:28,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 14:54:28,831 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 85 [2020-10-13 14:54:28,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:54:29,214 INFO L225 Difference]: With dead ends: 245664 [2020-10-13 14:54:29,214 INFO L226 Difference]: Without dead ends: 202206 [2020-10-13 14:54:29,310 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2020-10-13 14:54:29,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202206 states. [2020-10-13 14:54:36,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202206 to 86962. [2020-10-13 14:54:36,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86962 states. [2020-10-13 14:54:36,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86962 states to 86962 states and 131505 transitions. [2020-10-13 14:54:36,687 INFO L78 Accepts]: Start accepts. Automaton has 86962 states and 131505 transitions. Word has length 85 [2020-10-13 14:54:36,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:54:36,688 INFO L479 AbstractCegarLoop]: Abstraction has 86962 states and 131505 transitions. [2020-10-13 14:54:36,688 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 14:54:36,688 INFO L276 IsEmpty]: Start isEmpty. Operand 86962 states and 131505 transitions. [2020-10-13 14:54:36,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-13 14:54:36,689 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:54:36,689 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:54:36,689 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 14:54:36,689 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:54:36,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:54:36,690 INFO L82 PathProgramCache]: Analyzing trace with hash -390360391, now seen corresponding path program 1 times [2020-10-13 14:54:36,690 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:54:36,690 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1046580989] [2020-10-13 14:54:36,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:54:36,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:54:36,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:54:36,886 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:54:36,886 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-13 14:54:36,887 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:54:36,887 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 166 [2020-10-13 14:54:36,887 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:54:36,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 14:54:36,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 88 [2020-10-13 14:54:36,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-13 14:54:36,888 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:54:37,120 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-13 14:54:37,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:54:37,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:54:37,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:54:37,136 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:54:37,136 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:54:37,136 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:54:37,137 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-13 14:54:37,137 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:54:37,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:54:37,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:54:37,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:54:37,137 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:54:37,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:54:37,153 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1046580989] [2020-10-13 14:54:37,153 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:54:37,154 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:54:37,154 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458842002] [2020-10-13 14:54:37,154 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 14:54:37,155 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:54:37,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 14:54:37,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:54:37,155 INFO L87 Difference]: Start difference. First operand 86962 states and 131505 transitions. Second operand 5 states. [2020-10-13 14:54:47,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:54:47,529 INFO L93 Difference]: Finished difference Result 176948 states and 266034 transitions. [2020-10-13 14:54:47,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 14:54:47,530 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 86 [2020-10-13 14:54:47,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:54:47,816 INFO L225 Difference]: With dead ends: 176948 [2020-10-13 14:54:47,816 INFO L226 Difference]: Without dead ends: 176946 [2020-10-13 14:54:47,857 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:54:47,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176946 states. [2020-10-13 14:54:53,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176946 to 90034. [2020-10-13 14:54:53,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90034 states. [2020-10-13 14:54:53,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90034 states to 90034 states and 134577 transitions. [2020-10-13 14:54:53,741 INFO L78 Accepts]: Start accepts. Automaton has 90034 states and 134577 transitions. Word has length 86 [2020-10-13 14:54:53,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:54:53,741 INFO L479 AbstractCegarLoop]: Abstraction has 90034 states and 134577 transitions. [2020-10-13 14:54:53,741 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 14:54:53,741 INFO L276 IsEmpty]: Start isEmpty. Operand 90034 states and 134577 transitions. [2020-10-13 14:54:53,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-13 14:54:53,743 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:54:53,743 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:54:53,743 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 14:54:53,743 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:54:53,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:54:53,744 INFO L82 PathProgramCache]: Analyzing trace with hash 793349595, now seen corresponding path program 1 times [2020-10-13 14:54:53,744 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:54:53,744 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [524058742] [2020-10-13 14:54:53,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:54:53,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:54:53,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:54:53,901 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:54:53,902 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-13 14:54:53,902 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:54:53,902 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 125 [2020-10-13 14:54:53,903 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:54:53,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:54:53,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 14:54:53,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-13 14:54:53,904 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:54:54,206 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-13 14:54:54,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:54:54,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:54:54,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:54:54,226 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:54:54,226 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:54:54,226 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:54:54,227 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-13 14:54:54,227 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:54:54,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:54:54,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:54:54,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:54:54,228 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:54:54,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:54:54,268 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [524058742] [2020-10-13 14:54:54,268 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:54:54,269 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:54:54,269 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217773706] [2020-10-13 14:54:54,269 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:54:54,270 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:54:54,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:54:54,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:54:54,271 INFO L87 Difference]: Start difference. First operand 90034 states and 134577 transitions. Second operand 4 states. [2020-10-13 14:54:54,507 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-13 14:55:04,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:55:04,854 INFO L93 Difference]: Finished difference Result 222920 states and 333253 transitions. [2020-10-13 14:55:04,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:55:04,855 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 87 [2020-10-13 14:55:04,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:55:05,062 INFO L225 Difference]: With dead ends: 222920 [2020-10-13 14:55:05,062 INFO L226 Difference]: Without dead ends: 132934 [2020-10-13 14:55:05,142 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:55:05,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132934 states. [2020-10-13 14:55:12,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132934 to 132228. [2020-10-13 14:55:12,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132228 states. [2020-10-13 14:55:13,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132228 states to 132228 states and 196611 transitions. [2020-10-13 14:55:13,081 INFO L78 Accepts]: Start accepts. Automaton has 132228 states and 196611 transitions. Word has length 87 [2020-10-13 14:55:13,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:55:13,081 INFO L479 AbstractCegarLoop]: Abstraction has 132228 states and 196611 transitions. [2020-10-13 14:55:13,081 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:55:13,081 INFO L276 IsEmpty]: Start isEmpty. Operand 132228 states and 196611 transitions. [2020-10-13 14:55:13,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-10-13 14:55:13,125 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:55:13,126 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:55:13,126 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 14:55:13,126 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:55:13,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:55:13,127 INFO L82 PathProgramCache]: Analyzing trace with hash 240508358, now seen corresponding path program 1 times [2020-10-13 14:55:13,127 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:55:13,127 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1008565210] [2020-10-13 14:55:13,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:55:13,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:55:13,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:55:13,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:55:13,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:55:14,536 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:55:14,536 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 124 [2020-10-13 14:55:14,536 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 14:55:14,537 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1374 [2020-10-13 14:55:14,537 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:55:14,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 14:55:14,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 14:55:14,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 93 [2020-10-13 14:55:14,538 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:55:15,459 WARN L193 SmtUtils]: Spent 615.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-13 14:55:15,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:55:15,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:55:15,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:55:15,472 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:55:15,473 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:55:15,473 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:55:15,473 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 14:55:15,473 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:55:15,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:55:15,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:55:15,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:55:15,474 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:55:15,518 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:55:15,518 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1008565210] [2020-10-13 14:55:15,518 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 14:55:15,519 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 14:55:15,519 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013011879] [2020-10-13 14:55:15,519 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 14:55:15,520 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:55:15,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 14:55:15,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-13 14:55:15,520 INFO L87 Difference]: Start difference. First operand 132228 states and 196611 transitions. Second operand 9 states. [2020-10-13 14:55:15,766 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-13 14:56:13,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:56:13,731 INFO L93 Difference]: Finished difference Result 795356 states and 1175959 transitions. [2020-10-13 14:56:13,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-13 14:56:13,732 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 118 [2020-10-13 14:56:13,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:56:14,809 INFO L225 Difference]: With dead ends: 795356 [2020-10-13 14:56:14,809 INFO L226 Difference]: Without dead ends: 679418 [2020-10-13 14:56:14,983 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=241, Invalid=815, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 14:56:15,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 679418 states. [2020-10-13 14:56:41,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 679418 to 220540. [2020-10-13 14:56:41,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220540 states. [2020-10-13 14:56:42,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220540 states to 220540 states and 326491 transitions. [2020-10-13 14:56:42,306 INFO L78 Accepts]: Start accepts. Automaton has 220540 states and 326491 transitions. Word has length 118 [2020-10-13 14:56:42,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:56:42,306 INFO L479 AbstractCegarLoop]: Abstraction has 220540 states and 326491 transitions. [2020-10-13 14:56:42,307 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 14:56:42,307 INFO L276 IsEmpty]: Start isEmpty. Operand 220540 states and 326491 transitions. [2020-10-13 14:56:42,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-10-13 14:56:42,346 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:56:42,347 INFO L422 BasicCegarLoop]: trace histogram [2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:56:42,347 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 14:56:42,347 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:56:42,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:56:42,347 INFO L82 PathProgramCache]: Analyzing trace with hash 1540825001, now seen corresponding path program 1 times [2020-10-13 14:56:42,348 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:56:42,348 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [324012965] [2020-10-13 14:56:42,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:56:42,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:56:42,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:42,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:42,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:43,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:46,709 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:56:46,710 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 124 [2020-10-13 14:56:46,710 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 14:56:46,710 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4333 [2020-10-13 14:56:46,710 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:56:46,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:56:46,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 58 [2020-10-13 14:56:46,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-13 14:56:46,711 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:56:46,932 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-13 14:56:46,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:56:46,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:56:46,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:56:46,944 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:56:46,945 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:56:46,945 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:56:46,945 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 14:56:46,945 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:56:46,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:56:46,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:56:46,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:56:46,946 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:56:46,973 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:56:46,974 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [324012965] [2020-10-13 14:56:46,974 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:56:46,974 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:56:46,974 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117492933] [2020-10-13 14:56:46,975 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:56:46,975 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:56:46,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:56:46,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:56:46,976 INFO L87 Difference]: Start difference. First operand 220540 states and 326491 transitions. Second operand 4 states. [2020-10-13 14:57:04,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:57:04,840 INFO L93 Difference]: Finished difference Result 370699 states and 549916 transitions. [2020-10-13 14:57:04,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 14:57:04,841 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 118 [2020-10-13 14:57:04,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:57:05,037 INFO L225 Difference]: With dead ends: 370699 [2020-10-13 14:57:05,038 INFO L226 Difference]: Without dead ends: 150209 [2020-10-13 14:57:05,153 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:57:05,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150209 states.