/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=BIGGEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.7.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 19:47:10,907 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 19:47:10,909 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 19:47:10,934 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 19:47:10,934 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 19:47:10,935 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 19:47:10,937 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 19:47:10,939 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 19:47:10,941 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 19:47:10,941 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 19:47:10,943 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 19:47:10,944 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 19:47:10,944 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 19:47:10,945 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 19:47:10,946 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 19:47:10,948 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 19:47:10,949 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 19:47:10,950 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 19:47:10,952 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 19:47:10,954 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 19:47:10,957 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 19:47:10,958 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 19:47:10,959 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 19:47:10,966 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 19:47:10,972 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 19:47:10,973 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 19:47:10,973 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 19:47:10,974 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 19:47:10,974 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 19:47:10,978 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 19:47:10,978 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 19:47:10,979 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 19:47:10,981 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 19:47:10,982 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 19:47:10,985 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 19:47:10,985 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 19:47:10,986 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 19:47:10,986 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 19:47:10,986 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 19:47:10,987 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 19:47:10,988 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 19:47:10,990 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-12 19:47:11,033 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 19:47:11,034 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 19:47:11,036 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 19:47:11,036 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 19:47:11,037 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 19:47:11,037 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 19:47:11,037 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 19:47:11,037 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 19:47:11,038 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 19:47:11,038 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 19:47:11,039 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 19:47:11,039 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 19:47:11,039 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 19:47:11,040 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 19:47:11,040 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 19:47:11,040 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 19:47:11,040 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 19:47:11,041 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 19:47:11,041 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 19:47:11,041 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 19:47:11,041 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 19:47:11,042 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 19:47:11,042 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 19:47:11,042 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 19:47:11,042 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 19:47:11,042 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 19:47:11,043 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 19:47:11,043 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 19:47:11,043 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 19:47:11,043 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; [2020-10-12 19:47:11,390 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 19:47:11,409 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 19:47:11,415 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 19:47:11,417 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 19:47:11,417 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 19:47:11,418 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.7.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-12 19:47:11,490 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/19dee9ba1/f41bae94e29746808615aefa54a36b02/FLAGbfbad929c [2020-10-12 19:47:12,062 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 19:47:12,063 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.7.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-12 19:47:12,081 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/19dee9ba1/f41bae94e29746808615aefa54a36b02/FLAGbfbad929c [2020-10-12 19:47:12,327 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/19dee9ba1/f41bae94e29746808615aefa54a36b02 [2020-10-12 19:47:12,335 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 19:47:12,337 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 19:47:12,338 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 19:47:12,339 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 19:47:12,342 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 19:47:12,343 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 07:47:12" (1/1) ... [2020-10-12 19:47:12,346 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@434f45a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:47:12, skipping insertion in model container [2020-10-12 19:47:12,346 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 07:47:12" (1/1) ... [2020-10-12 19:47:12,354 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 19:47:12,417 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 19:47:12,732 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 19:47:12,755 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 19:47:12,954 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 19:47:12,979 INFO L208 MainTranslator]: Completed translation [2020-10-12 19:47:12,979 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:47:12 WrapperNode [2020-10-12 19:47:12,979 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 19:47:12,980 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 19:47:12,980 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 19:47:12,980 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 19:47:12,993 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:47:12" (1/1) ... [2020-10-12 19:47:12,993 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:47:12" (1/1) ... [2020-10-12 19:47:13,006 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:47:12" (1/1) ... [2020-10-12 19:47:13,007 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:47:12" (1/1) ... [2020-10-12 19:47:13,022 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:47:12" (1/1) ... [2020-10-12 19:47:13,033 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:47:12" (1/1) ... [2020-10-12 19:47:13,037 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:47:12" (1/1) ... [2020-10-12 19:47:13,042 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 19:47:13,043 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 19:47:13,043 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 19:47:13,043 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 19:47:13,044 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:47:12" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 19:47:13,111 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 19:47:13,112 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 19:47:13,112 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-12 19:47:13,112 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 19:47:13,112 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 19:47:13,112 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-12 19:47:13,113 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-12 19:47:13,113 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-12 19:47:13,113 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-12 19:47:13,113 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-12 19:47:13,113 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-12 19:47:13,113 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-12 19:47:13,114 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-12 19:47:13,114 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-12 19:47:13,114 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-12 19:47:13,115 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-12 19:47:13,115 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-12 19:47:13,115 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-10-12 19:47:13,115 INFO L130 BoogieDeclarations]: Found specification of procedure node6 [2020-10-12 19:47:13,115 INFO L130 BoogieDeclarations]: Found specification of procedure node7 [2020-10-12 19:47:13,115 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-12 19:47:13,116 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-12 19:47:13,116 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 19:47:13,116 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 19:47:13,116 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 19:47:13,851 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 19:47:13,851 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-12 19:47:13,857 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 07:47:13 BoogieIcfgContainer [2020-10-12 19:47:13,857 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 19:47:13,858 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 19:47:13,858 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 19:47:13,861 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 19:47:13,862 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 07:47:12" (1/3) ... [2020-10-12 19:47:13,862 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59c43e16 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 07:47:13, skipping insertion in model container [2020-10-12 19:47:13,863 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:47:12" (2/3) ... [2020-10-12 19:47:13,863 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@59c43e16 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 07:47:13, skipping insertion in model container [2020-10-12 19:47:13,863 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 07:47:13" (3/3) ... [2020-10-12 19:47:13,865 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_lcr.7.1.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-12 19:47:13,875 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 19:47:13,884 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 19:47:13,897 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 19:47:13,923 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 19:47:13,923 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 19:47:13,924 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 19:47:13,924 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 19:47:13,924 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 19:47:13,924 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 19:47:13,924 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 19:47:13,925 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 19:47:13,948 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states. [2020-10-12 19:47:13,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-10-12 19:47:13,960 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:47:13,961 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, 1, 1, 1, 1] [2020-10-12 19:47:13,962 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:47:13,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:47:13,968 INFO L82 PathProgramCache]: Analyzing trace with hash 1044039479, now seen corresponding path program 1 times [2020-10-12 19:47:13,976 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:47:13,976 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1274917536] [2020-10-12 19:47:13,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:47:14,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:47:14,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:47:14,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:47:14,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:47:14,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:47:15,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:47:15,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:47:19,307 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:47:19,308 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-12 19:47:19,308 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 19:47:19,308 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-12 19:47:19,311 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:47:19,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 19:47:19,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:47:19,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-12 19:47:19,312 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-12 19:47:19,692 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-12 19:47:19,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:47:19,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:47:19,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:47:19,741 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:47:19,741 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:47:19,742 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:47:19,742 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 34 [2020-10-12 19:47:19,742 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:47:19,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:47:19,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:47:19,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:47:19,743 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:47:19,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:47:19,791 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1274917536] [2020-10-12 19:47:19,793 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:47:19,794 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 19:47:19,795 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375711307] [2020-10-12 19:47:19,800 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 19:47:19,800 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:47:19,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 19:47:19,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-12 19:47:19,817 INFO L87 Difference]: Start difference. First operand 143 states. Second operand 6 states. [2020-10-12 19:47:20,100 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-12 19:47:20,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:47:20,948 INFO L93 Difference]: Finished difference Result 318 states and 511 transitions. [2020-10-12 19:47:20,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 19:47:20,950 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 91 [2020-10-12 19:47:20,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:47:20,965 INFO L225 Difference]: With dead ends: 318 [2020-10-12 19:47:20,966 INFO L226 Difference]: Without dead ends: 220 [2020-10-12 19:47:20,970 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-12 19:47:20,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2020-10-12 19:47:21,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 218. [2020-10-12 19:47:21,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 218 states. [2020-10-12 19:47:21,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 313 transitions. [2020-10-12 19:47:21,038 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 313 transitions. Word has length 91 [2020-10-12 19:47:21,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:47:21,039 INFO L479 AbstractCegarLoop]: Abstraction has 218 states and 313 transitions. [2020-10-12 19:47:21,039 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 19:47:21,039 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 313 transitions. [2020-10-12 19:47:21,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-10-12 19:47:21,044 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:47:21,044 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, 1, 1, 1, 1] [2020-10-12 19:47:21,044 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 19:47:21,045 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:47:21,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:47:21,045 INFO L82 PathProgramCache]: Analyzing trace with hash -424454372, now seen corresponding path program 1 times [2020-10-12 19:47:21,045 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:47:21,046 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [397610903] [2020-10-12 19:47:21,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:47:21,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:47:21,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:47:21,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:47:21,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:47:21,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:47:21,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:47:22,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:47:22,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:47:26,110 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:47:26,110 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-12 19:47:26,111 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 19:47:26,111 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5027 [2020-10-12 19:47:26,111 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:47:26,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 19:47:26,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 19:47:26,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-12 19:47:26,112 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:47:26,450 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-12 19:47:26,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:47:26,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:47:26,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:47:26,466 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:47:26,466 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:47:26,466 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:47:26,466 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-12 19:47:26,467 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:47:26,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:47:26,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:47:26,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:47:26,468 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:47:26,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:47:26,505 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [397610903] [2020-10-12 19:47:26,505 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:47:26,505 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-12 19:47:26,505 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312806046] [2020-10-12 19:47:26,508 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 19:47:26,508 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:47:26,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 19:47:26,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-12 19:47:26,509 INFO L87 Difference]: Start difference. First operand 218 states and 313 transitions. Second operand 10 states. [2020-10-12 19:47:26,806 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 183 [2020-10-12 19:47:27,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:47:27,977 INFO L93 Difference]: Finished difference Result 2472 states and 3897 transitions. [2020-10-12 19:47:27,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-12 19:47:27,978 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 91 [2020-10-12 19:47:27,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:47:28,001 INFO L225 Difference]: With dead ends: 2472 [2020-10-12 19:47:28,001 INFO L226 Difference]: Without dead ends: 2311 [2020-10-12 19:47:28,009 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=147, Invalid=315, Unknown=0, NotChecked=0, Total=462 [2020-10-12 19:47:28,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2311 states. [2020-10-12 19:47:28,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2311 to 377. [2020-10-12 19:47:28,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 377 states. [2020-10-12 19:47:28,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 564 transitions. [2020-10-12 19:47:28,102 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 564 transitions. Word has length 91 [2020-10-12 19:47:28,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:47:28,103 INFO L479 AbstractCegarLoop]: Abstraction has 377 states and 564 transitions. [2020-10-12 19:47:28,103 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 19:47:28,103 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 564 transitions. [2020-10-12 19:47:28,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-10-12 19:47:28,108 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:47:28,109 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, 1, 1, 1, 1, 1, 1] [2020-10-12 19:47:28,109 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 19:47:28,109 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:47:28,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:47:28,110 INFO L82 PathProgramCache]: Analyzing trace with hash -2113284881, now seen corresponding path program 1 times [2020-10-12 19:47:28,110 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:47:28,110 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [631865188] [2020-10-12 19:47:28,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:47:28,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:47:28,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:47:28,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:47:28,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:47:28,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:47:28,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:47:29,030 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:47:29,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:47:32,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:47:32,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:47:33,159 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:47:33,160 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-12 19:47:33,160 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-12 19:47:33,161 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-12 19:47:33,161 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:47:33,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 19:47:33,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 19:47:33,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-12 19:47:33,162 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 19:47:33,550 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-12 19:47:33,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:47:33,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:47:33,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:47:33,566 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:47:33,566 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:47:33,566 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:47:33,566 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-12 19:47:33,567 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:47:33,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:47:33,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:47:33,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:47:33,567 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:47:33,599 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:47:33,600 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [631865188] [2020-10-12 19:47:33,600 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:47:33,600 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-12 19:47:33,600 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183589750] [2020-10-12 19:47:33,601 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 19:47:33,601 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:47:33,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 19:47:33,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-12 19:47:33,602 INFO L87 Difference]: Start difference. First operand 377 states and 564 transitions. Second operand 10 states. [2020-10-12 19:47:33,862 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-12 19:47:35,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:47:35,279 INFO L93 Difference]: Finished difference Result 3672 states and 5768 transitions. [2020-10-12 19:47:35,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-12 19:47:35,280 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 93 [2020-10-12 19:47:35,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:47:35,302 INFO L225 Difference]: With dead ends: 3672 [2020-10-12 19:47:35,302 INFO L226 Difference]: Without dead ends: 3352 [2020-10-12 19:47:35,307 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=147, Invalid=315, Unknown=0, NotChecked=0, Total=462 [2020-10-12 19:47:35,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3352 states. [2020-10-12 19:47:35,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3352 to 846. [2020-10-12 19:47:35,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 846 states. [2020-10-12 19:47:35,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 846 states to 846 states and 1305 transitions. [2020-10-12 19:47:35,435 INFO L78 Accepts]: Start accepts. Automaton has 846 states and 1305 transitions. Word has length 93 [2020-10-12 19:47:35,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:47:35,435 INFO L479 AbstractCegarLoop]: Abstraction has 846 states and 1305 transitions. [2020-10-12 19:47:35,435 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 19:47:35,435 INFO L276 IsEmpty]: Start isEmpty. Operand 846 states and 1305 transitions. [2020-10-12 19:47:35,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-10-12 19:47:35,444 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:47:35,444 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, 1, 1, 1, 1, 1, 1] [2020-10-12 19:47:35,445 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-12 19:47:35,445 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:47:35,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:47:35,445 INFO L82 PathProgramCache]: Analyzing trace with hash -994949637, now seen corresponding path program 1 times [2020-10-12 19:47:35,446 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:47:35,446 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [375756913] [2020-10-12 19:47:35,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:47:35,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:47:35,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:47:35,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:47:35,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:47:35,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:47:35,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:47:36,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:47:36,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:47:38,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:47:38,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:47:40,473 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:47:40,473 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-12 19:47:40,473 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-12 19:47:40,473 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-12 19:47:40,474 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:47:40,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 19:47:40,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 19:47:40,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-12 19:47:40,474 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:47:40,831 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-12 19:47:40,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:47:40,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:47:40,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:47:40,857 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:47:40,857 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:47:40,858 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:47:40,858 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-12 19:47:40,858 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:47:40,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:47:40,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:47:40,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:47:40,860 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 19:47:40,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:47:40,910 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [375756913] [2020-10-12 19:47:40,911 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:47:40,911 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-12 19:47:40,911 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275625844] [2020-10-12 19:47:40,912 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 19:47:40,913 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:47:40,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 19:47:40,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-12 19:47:40,914 INFO L87 Difference]: Start difference. First operand 846 states and 1305 transitions. Second operand 10 states. [2020-10-12 19:47:41,338 WARN L193 SmtUtils]: Spent 329.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-12 19:47:43,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:47:43,207 INFO L93 Difference]: Finished difference Result 4472 states and 7016 transitions. [2020-10-12 19:47:43,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-12 19:47:43,208 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 93 [2020-10-12 19:47:43,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:47:43,228 INFO L225 Difference]: With dead ends: 4472 [2020-10-12 19:47:43,228 INFO L226 Difference]: Without dead ends: 4001 [2020-10-12 19:47:43,231 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=147, Invalid=315, Unknown=0, NotChecked=0, Total=462 [2020-10-12 19:47:43,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4001 states. [2020-10-12 19:47:43,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4001 to 1323. [2020-10-12 19:47:43,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1323 states. [2020-10-12 19:47:43,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1323 states to 1323 states and 2060 transitions. [2020-10-12 19:47:43,393 INFO L78 Accepts]: Start accepts. Automaton has 1323 states and 2060 transitions. Word has length 93 [2020-10-12 19:47:43,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:47:43,395 INFO L479 AbstractCegarLoop]: Abstraction has 1323 states and 2060 transitions. [2020-10-12 19:47:43,395 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 19:47:43,395 INFO L276 IsEmpty]: Start isEmpty. Operand 1323 states and 2060 transitions. [2020-10-12 19:47:43,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-10-12 19:47:43,405 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:47:43,405 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, 1, 1, 1, 1, 1, 1] [2020-10-12 19:47:43,406 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-12 19:47:43,407 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:47:43,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:47:43,407 INFO L82 PathProgramCache]: Analyzing trace with hash 1313679309, now seen corresponding path program 1 times [2020-10-12 19:47:43,407 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:47:43,408 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1780517749] [2020-10-12 19:47:43,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:47:43,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:47:43,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:47:43,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:47:43,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:47:43,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:47:43,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:47:43,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:47:44,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:47:44,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:47:45,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:47:48,452 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:47:48,452 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-12 19:47:48,452 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-12 19:47:48,452 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-12 19:47:48,453 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:47:48,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 19:47:48,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 19:47:48,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-12 19:47:48,454 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:47:48,774 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-12 19:47:48,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:47:48,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:47:48,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:47:48,790 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:47:48,790 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:47:48,790 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:47:48,791 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-12 19:47:48,791 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:47:48,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:47:48,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:47:48,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:47:48,792 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:47:48,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:47:48,828 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1780517749] [2020-10-12 19:47:48,828 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:47:48,828 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-12 19:47:48,829 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645507579] [2020-10-12 19:47:48,829 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 19:47:48,830 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:47:48,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 19:47:48,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-12 19:47:48,830 INFO L87 Difference]: Start difference. First operand 1323 states and 2060 transitions. Second operand 10 states. [2020-10-12 19:47:49,088 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-12 19:47:50,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:47:50,187 INFO L93 Difference]: Finished difference Result 4659 states and 7311 transitions. [2020-10-12 19:47:50,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-12 19:47:50,192 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 93 [2020-10-12 19:47:50,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:47:50,212 INFO L225 Difference]: With dead ends: 4659 [2020-10-12 19:47:50,213 INFO L226 Difference]: Without dead ends: 4188 [2020-10-12 19:47:50,217 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=147, Invalid=315, Unknown=0, NotChecked=0, Total=462 [2020-10-12 19:47:50,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4188 states. [2020-10-12 19:47:50,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4188 to 1641. [2020-10-12 19:47:50,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1641 states. [2020-10-12 19:47:50,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1641 states to 1641 states and 2564 transitions. [2020-10-12 19:47:50,444 INFO L78 Accepts]: Start accepts. Automaton has 1641 states and 2564 transitions. Word has length 93 [2020-10-12 19:47:50,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:47:50,444 INFO L479 AbstractCegarLoop]: Abstraction has 1641 states and 2564 transitions. [2020-10-12 19:47:50,444 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 19:47:50,444 INFO L276 IsEmpty]: Start isEmpty. Operand 1641 states and 2564 transitions. [2020-10-12 19:47:50,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-10-12 19:47:50,446 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:47:50,446 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, 1, 1, 1, 1, 1, 1] [2020-10-12 19:47:50,447 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-12 19:47:50,447 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:47:50,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:47:50,447 INFO L82 PathProgramCache]: Analyzing trace with hash -771947209, now seen corresponding path program 1 times [2020-10-12 19:47:50,448 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:47:50,448 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [601286585] [2020-10-12 19:47:50,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:47:50,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:47:50,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:47:50,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:47:50,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:47:50,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:47:50,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:47:50,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:47:51,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:47:51,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:47:51,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:47:55,210 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:47:55,211 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-12 19:47:55,211 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-12 19:47:55,211 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4736 [2020-10-12 19:47:55,211 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:47:55,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 19:47:55,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 95 [2020-10-12 19:47:55,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-12 19:47:55,212 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:47:55,435 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-12 19:47:55,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:47:55,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:47:55,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:47:55,448 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:47:55,448 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:47:55,449 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:47:55,449 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 19:47:55,449 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:47:55,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:47:55,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:47:55,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:47:55,450 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:47:55,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:47:55,464 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [601286585] [2020-10-12 19:47:55,465 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:47:55,465 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 19:47:55,465 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416328446] [2020-10-12 19:47:55,465 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 19:47:55,466 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:47:55,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 19:47:55,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-12 19:47:55,466 INFO L87 Difference]: Start difference. First operand 1641 states and 2564 transitions. Second operand 5 states. [2020-10-12 19:47:56,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:47:56,523 INFO L93 Difference]: Finished difference Result 3238 states and 5070 transitions. [2020-10-12 19:47:56,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-12 19:47:56,524 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 93 [2020-10-12 19:47:56,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:47:56,536 INFO L225 Difference]: With dead ends: 3238 [2020-10-12 19:47:56,537 INFO L226 Difference]: Without dead ends: 3236 [2020-10-12 19:47:56,538 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 [2020-10-12 19:47:56,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3236 states. [2020-10-12 19:47:56,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3236 to 1677. [2020-10-12 19:47:56,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1677 states. [2020-10-12 19:47:56,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1677 states to 1677 states and 2600 transitions. [2020-10-12 19:47:56,767 INFO L78 Accepts]: Start accepts. Automaton has 1677 states and 2600 transitions. Word has length 93 [2020-10-12 19:47:56,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:47:56,767 INFO L479 AbstractCegarLoop]: Abstraction has 1677 states and 2600 transitions. [2020-10-12 19:47:56,767 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 19:47:56,767 INFO L276 IsEmpty]: Start isEmpty. Operand 1677 states and 2600 transitions. [2020-10-12 19:47:56,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-10-12 19:47:56,769 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:47:56,769 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, 1, 1, 1, 1, 1, 1] [2020-10-12 19:47:56,770 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-12 19:47:56,770 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:47:56,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:47:56,770 INFO L82 PathProgramCache]: Analyzing trace with hash -751897866, now seen corresponding path program 1 times [2020-10-12 19:47:56,770 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:47:56,771 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [635984487] [2020-10-12 19:47:56,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:47:56,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:47:56,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:47:56,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:47:56,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:47:56,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:47:57,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:47:57,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:47:58,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:48:01,797 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:48:01,797 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-12 19:48:01,797 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 19:48:01,798 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-12 19:48:01,798 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:48:01,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 19:48:01,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 19:48:01,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-12 19:48:01,798 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:48:02,117 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-12 19:48:02,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:48:02,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:48:02,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:48:02,131 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:48:02,131 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:48:02,131 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:48:02,131 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-12 19:48:02,132 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:48:02,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:48:02,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:48:02,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:48:02,132 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:48:02,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:48:02,173 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [635984487] [2020-10-12 19:48:02,173 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:48:02,173 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-12 19:48:02,173 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57208007] [2020-10-12 19:48:02,174 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 19:48:02,174 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:48:02,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 19:48:02,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-12 19:48:02,175 INFO L87 Difference]: Start difference. First operand 1677 states and 2600 transitions. Second operand 10 states. [2020-10-12 19:48:02,529 WARN L193 SmtUtils]: Spent 271.00 ms on a formula simplification that was a NOOP. DAG size: 190 [2020-10-12 19:48:03,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:48:03,916 INFO L93 Difference]: Finished difference Result 5708 states and 8911 transitions. [2020-10-12 19:48:03,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-12 19:48:03,918 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 93 [2020-10-12 19:48:03,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:48:03,932 INFO L225 Difference]: With dead ends: 5708 [2020-10-12 19:48:03,932 INFO L226 Difference]: Without dead ends: 4088 [2020-10-12 19:48:03,936 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=147, Invalid=315, Unknown=0, NotChecked=0, Total=462 [2020-10-12 19:48:03,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4088 states. [2020-10-12 19:48:04,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4088 to 1677. [2020-10-12 19:48:04,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1677 states. [2020-10-12 19:48:04,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1677 states to 1677 states and 2590 transitions. [2020-10-12 19:48:04,197 INFO L78 Accepts]: Start accepts. Automaton has 1677 states and 2590 transitions. Word has length 93 [2020-10-12 19:48:04,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:48:04,198 INFO L479 AbstractCegarLoop]: Abstraction has 1677 states and 2590 transitions. [2020-10-12 19:48:04,198 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 19:48:04,198 INFO L276 IsEmpty]: Start isEmpty. Operand 1677 states and 2590 transitions. [2020-10-12 19:48:04,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-10-12 19:48:04,200 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:48:04,200 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, 1, 1, 1, 1, 1, 1] [2020-10-12 19:48:04,201 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-12 19:48:04,201 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:48:04,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:48:04,201 INFO L82 PathProgramCache]: Analyzing trace with hash 1289934087, now seen corresponding path program 1 times [2020-10-12 19:48:04,202 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:48:04,202 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [136122744] [2020-10-12 19:48:04,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:48:04,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:48:04,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:48:04,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:48:04,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:48:04,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:48:04,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:48:04,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:48:04,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:48:06,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:48:06,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:48:09,234 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:48:09,235 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-12 19:48:09,235 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-12 19:48:09,235 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-12 19:48:09,235 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:48:09,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 19:48:09,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 19:48:09,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-12 19:48:09,236 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:48:09,490 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-12 19:48:09,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:48:09,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:48:09,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:48:09,503 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:48:09,503 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:48:09,503 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:48:09,503 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 19:48:09,503 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:48:09,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:48:09,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:48:09,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:48:09,504 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:48:09,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:48:09,532 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [136122744] [2020-10-12 19:48:09,532 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:48:09,533 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-12 19:48:09,533 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602972329] [2020-10-12 19:48:09,533 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 19:48:09,533 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:48:09,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 19:48:09,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-12 19:48:09,534 INFO L87 Difference]: Start difference. First operand 1677 states and 2590 transitions. Second operand 10 states. [2020-10-12 19:48:09,822 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-12 19:48:11,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:48:11,497 INFO L93 Difference]: Finished difference Result 5232 states and 8136 transitions. [2020-10-12 19:48:11,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-12 19:48:11,498 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 93 [2020-10-12 19:48:11,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:48:11,535 INFO L225 Difference]: With dead ends: 5232 [2020-10-12 19:48:11,535 INFO L226 Difference]: Without dead ends: 4753 [2020-10-12 19:48:11,541 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=147, Invalid=315, Unknown=0, NotChecked=0, Total=462 [2020-10-12 19:48:11,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4753 states. [2020-10-12 19:48:11,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4753 to 2003. [2020-10-12 19:48:11,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2003 states. [2020-10-12 19:48:11,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2003 states to 2003 states and 3100 transitions. [2020-10-12 19:48:11,837 INFO L78 Accepts]: Start accepts. Automaton has 2003 states and 3100 transitions. Word has length 93 [2020-10-12 19:48:11,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:48:11,838 INFO L479 AbstractCegarLoop]: Abstraction has 2003 states and 3100 transitions. [2020-10-12 19:48:11,838 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 19:48:11,838 INFO L276 IsEmpty]: Start isEmpty. Operand 2003 states and 3100 transitions. [2020-10-12 19:48:11,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-10-12 19:48:11,840 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:48:11,840 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, 1, 1, 1, 1, 1, 1] [2020-10-12 19:48:11,840 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-12 19:48:11,841 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:48:11,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:48:11,841 INFO L82 PathProgramCache]: Analyzing trace with hash 917408193, now seen corresponding path program 1 times [2020-10-12 19:48:11,841 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:48:11,841 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1931179138] [2020-10-12 19:48:11,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:48:11,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:48:11,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:48:11,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:48:11,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:48:11,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:48:12,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:48:12,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:48:12,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:48:13,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:48:13,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:48:16,872 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:48:16,873 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-12 19:48:16,873 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-12 19:48:16,873 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-12 19:48:16,873 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:48:16,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 19:48:16,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 19:48:16,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-12 19:48:16,873 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:48:17,128 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-12 19:48:17,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:48:17,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:48:17,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:48:17,138 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:48:17,138 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:48:17,138 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:48:17,139 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 19:48:17,139 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:48:17,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:48:17,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:48:17,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:48:17,139 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:48:17,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:48:17,159 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1931179138] [2020-10-12 19:48:17,159 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:48:17,159 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-12 19:48:17,159 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281903034] [2020-10-12 19:48:17,160 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 19:48:17,160 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:48:17,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 19:48:17,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-12 19:48:17,160 INFO L87 Difference]: Start difference. First operand 2003 states and 3100 transitions. Second operand 10 states. [2020-10-12 19:48:17,425 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-12 19:48:19,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:48:19,127 INFO L93 Difference]: Finished difference Result 5604 states and 8716 transitions. [2020-10-12 19:48:19,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-12 19:48:19,127 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 93 [2020-10-12 19:48:19,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:48:19,139 INFO L225 Difference]: With dead ends: 5604 [2020-10-12 19:48:19,139 INFO L226 Difference]: Without dead ends: 5125 [2020-10-12 19:48:19,143 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=147, Invalid=315, Unknown=0, NotChecked=0, Total=462 [2020-10-12 19:48:19,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5125 states. [2020-10-12 19:48:19,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5125 to 2329. [2020-10-12 19:48:19,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2329 states. [2020-10-12 19:48:19,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2329 states to 2329 states and 3610 transitions. [2020-10-12 19:48:19,463 INFO L78 Accepts]: Start accepts. Automaton has 2329 states and 3610 transitions. Word has length 93 [2020-10-12 19:48:19,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:48:19,463 INFO L479 AbstractCegarLoop]: Abstraction has 2329 states and 3610 transitions. [2020-10-12 19:48:19,463 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 19:48:19,464 INFO L276 IsEmpty]: Start isEmpty. Operand 2329 states and 3610 transitions. [2020-10-12 19:48:19,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-10-12 19:48:19,466 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:48:19,466 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, 1, 1, 1, 1, 1, 1] [2020-10-12 19:48:19,466 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-12 19:48:19,466 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:48:19,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:48:19,467 INFO L82 PathProgramCache]: Analyzing trace with hash 1611663797, now seen corresponding path program 1 times [2020-10-12 19:48:19,467 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:48:19,467 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [610395107] [2020-10-12 19:48:19,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:48:19,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:48:19,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:48:19,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:48:19,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:48:19,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:48:19,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:48:19,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:48:19,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:48:21,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:48:21,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:48:24,486 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:48:24,486 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-12 19:48:24,493 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-12 19:48:24,493 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-12 19:48:24,494 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:48:24,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 19:48:24,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 19:48:24,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-12 19:48:24,494 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:48:24,769 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-12 19:48:24,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:48:24,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:48:24,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:48:24,781 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:48:24,781 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:48:24,782 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:48:24,782 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 19:48:24,782 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:48:24,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:48:24,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:48:24,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:48:24,783 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:48:24,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:48:24,807 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [610395107] [2020-10-12 19:48:24,807 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:48:24,807 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-12 19:48:24,807 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958719054] [2020-10-12 19:48:24,808 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 19:48:24,808 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:48:24,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 19:48:24,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-12 19:48:24,808 INFO L87 Difference]: Start difference. First operand 2329 states and 3610 transitions. Second operand 10 states. [2020-10-12 19:48:25,075 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 184 [2020-10-12 19:48:27,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:48:27,031 INFO L93 Difference]: Finished difference Result 6016 states and 9360 transitions. [2020-10-12 19:48:27,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-12 19:48:27,031 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 93 [2020-10-12 19:48:27,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:48:27,041 INFO L225 Difference]: With dead ends: 6016 [2020-10-12 19:48:27,042 INFO L226 Difference]: Without dead ends: 5537 [2020-10-12 19:48:27,044 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=147, Invalid=315, Unknown=0, NotChecked=0, Total=462 [2020-10-12 19:48:27,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5537 states. [2020-10-12 19:48:27,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5537 to 2655. [2020-10-12 19:48:27,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2655 states. [2020-10-12 19:48:27,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2655 states to 2655 states and 4120 transitions. [2020-10-12 19:48:27,436 INFO L78 Accepts]: Start accepts. Automaton has 2655 states and 4120 transitions. Word has length 93 [2020-10-12 19:48:27,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:48:27,437 INFO L479 AbstractCegarLoop]: Abstraction has 2655 states and 4120 transitions. [2020-10-12 19:48:27,437 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 19:48:27,437 INFO L276 IsEmpty]: Start isEmpty. Operand 2655 states and 4120 transitions. [2020-10-12 19:48:27,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-10-12 19:48:27,439 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:48:27,439 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, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:48:27,439 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-12 19:48:27,439 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:48:27,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:48:27,440 INFO L82 PathProgramCache]: Analyzing trace with hash -787701702, now seen corresponding path program 1 times [2020-10-12 19:48:27,440 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:48:27,440 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [481969346] [2020-10-12 19:48:27,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:48:27,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:48:27,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:48:27,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:48:27,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:48:27,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:48:27,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:48:27,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:48:28,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:48:28,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:48:32,470 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:48:32,470 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-12 19:48:32,470 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 19:48:32,470 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-12 19:48:32,470 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:48:32,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 19:48:32,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:48:32,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-12 19:48:32,471 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:48:32,701 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-12 19:48:32,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:48:32,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:48:32,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:48:32,722 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:48:32,722 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:48:32,722 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:48:32,722 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-12 19:48:32,723 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:48:32,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:48:32,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:48:32,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:48:32,723 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:48:32,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:48:32,739 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [481969346] [2020-10-12 19:48:32,739 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:48:32,739 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 19:48:32,740 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843124040] [2020-10-12 19:48:32,740 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 19:48:32,740 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:48:32,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 19:48:32,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-12 19:48:32,741 INFO L87 Difference]: Start difference. First operand 2655 states and 4120 transitions. Second operand 7 states. [2020-10-12 19:48:32,976 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 174 [2020-10-12 19:48:34,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:48:34,449 INFO L93 Difference]: Finished difference Result 8446 states and 13215 transitions. [2020-10-12 19:48:34,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 19:48:34,449 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 94 [2020-10-12 19:48:34,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:48:34,462 INFO L225 Difference]: With dead ends: 8446 [2020-10-12 19:48:34,462 INFO L226 Difference]: Without dead ends: 5848 [2020-10-12 19:48:34,470 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-10-12 19:48:34,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5848 states. [2020-10-12 19:48:34,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5848 to 2662. [2020-10-12 19:48:34,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2662 states. [2020-10-12 19:48:34,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2662 states to 2662 states and 4130 transitions. [2020-10-12 19:48:34,963 INFO L78 Accepts]: Start accepts. Automaton has 2662 states and 4130 transitions. Word has length 94 [2020-10-12 19:48:34,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:48:34,964 INFO L479 AbstractCegarLoop]: Abstraction has 2662 states and 4130 transitions. [2020-10-12 19:48:34,964 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 19:48:34,964 INFO L276 IsEmpty]: Start isEmpty. Operand 2662 states and 4130 transitions. [2020-10-12 19:48:34,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-10-12 19:48:34,966 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:48:34,966 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, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:48:34,966 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-12 19:48:34,966 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:48:34,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:48:34,967 INFO L82 PathProgramCache]: Analyzing trace with hash 1849060151, now seen corresponding path program 1 times [2020-10-12 19:48:34,967 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:48:34,967 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [145542323] [2020-10-12 19:48:34,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:48:34,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:48:35,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:48:35,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:48:35,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:48:35,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:48:35,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:48:35,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:48:36,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:48:36,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:48:37,918 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:48:37,918 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-12 19:48:37,918 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 19:48:37,918 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2926 [2020-10-12 19:48:37,918 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:48:37,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:48:37,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40 [2020-10-12 19:48:37,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-12 19:48:37,919 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:48:38,132 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-12 19:48:38,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:48:38,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:48:38,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:48:38,147 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:48:38,148 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:48:38,148 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:48:38,148 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-12 19:48:38,148 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:48:38,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:48:38,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:48:38,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:48:38,148 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:48:38,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:48:38,163 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [145542323] [2020-10-12 19:48:38,163 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:48:38,163 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-12 19:48:38,164 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079331001] [2020-10-12 19:48:38,164 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-12 19:48:38,164 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:48:38,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-12 19:48:38,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-12 19:48:38,165 INFO L87 Difference]: Start difference. First operand 2662 states and 4130 transitions. Second operand 4 states. [2020-10-12 19:48:38,382 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 173 [2020-10-12 19:48:39,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:48:39,727 INFO L93 Difference]: Finished difference Result 7602 states and 11840 transitions. [2020-10-12 19:48:39,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 19:48:39,728 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 94 [2020-10-12 19:48:39,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:48:39,736 INFO L225 Difference]: With dead ends: 7602 [2020-10-12 19:48:39,736 INFO L226 Difference]: Without dead ends: 5004 [2020-10-12 19:48:39,743 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 [2020-10-12 19:48:39,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5004 states. [2020-10-12 19:48:40,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5004 to 5002. [2020-10-12 19:48:40,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5002 states. [2020-10-12 19:48:40,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5002 states to 5002 states and 7744 transitions. [2020-10-12 19:48:40,478 INFO L78 Accepts]: Start accepts. Automaton has 5002 states and 7744 transitions. Word has length 94 [2020-10-12 19:48:40,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:48:40,478 INFO L479 AbstractCegarLoop]: Abstraction has 5002 states and 7744 transitions. [2020-10-12 19:48:40,479 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-12 19:48:40,479 INFO L276 IsEmpty]: Start isEmpty. Operand 5002 states and 7744 transitions. [2020-10-12 19:48:40,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-10-12 19:48:40,481 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:48:40,481 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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:48:40,481 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-12 19:48:40,481 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:48:40,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:48:40,482 INFO L82 PathProgramCache]: Analyzing trace with hash 1058914148, now seen corresponding path program 1 times [2020-10-12 19:48:40,482 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:48:40,482 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [538625719] [2020-10-12 19:48:40,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:48:40,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:48:40,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:48:40,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:48:40,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:48:40,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:48:40,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:48:41,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:48:41,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:48:42,091 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:48:42,091 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-12 19:48:42,091 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 19:48:42,091 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1592 [2020-10-12 19:48:42,091 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:48:42,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:48:42,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-12 19:48:42,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-12 19:48:42,092 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:48:42,293 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-12 19:48:42,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:48:42,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:48:42,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:48:42,305 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:48:42,305 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:48:42,305 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:48:42,306 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 19:48:42,306 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:48:42,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:48:42,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:48:42,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:48:42,306 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:48:42,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:48:42,320 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [538625719] [2020-10-12 19:48:42,320 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:48:42,320 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-12 19:48:42,321 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944898696] [2020-10-12 19:48:42,321 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-12 19:48:42,321 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:48:42,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-12 19:48:42,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-12 19:48:42,322 INFO L87 Difference]: Start difference. First operand 5002 states and 7744 transitions. Second operand 4 states. [2020-10-12 19:48:42,561 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification that was a NOOP. DAG size: 173 [2020-10-12 19:48:44,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:48:44,373 INFO L93 Difference]: Finished difference Result 14366 states and 22266 transitions. [2020-10-12 19:48:44,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 19:48:44,374 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 95 [2020-10-12 19:48:44,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:48:44,385 INFO L225 Difference]: With dead ends: 14366 [2020-10-12 19:48:44,386 INFO L226 Difference]: Without dead ends: 9428 [2020-10-12 19:48:44,397 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 [2020-10-12 19:48:44,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9428 states. [2020-10-12 19:48:45,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9428 to 9426. [2020-10-12 19:48:45,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9426 states. [2020-10-12 19:48:45,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9426 states to 9426 states and 14524 transitions. [2020-10-12 19:48:45,877 INFO L78 Accepts]: Start accepts. Automaton has 9426 states and 14524 transitions. Word has length 95 [2020-10-12 19:48:45,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:48:45,878 INFO L479 AbstractCegarLoop]: Abstraction has 9426 states and 14524 transitions. [2020-10-12 19:48:45,878 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-12 19:48:45,878 INFO L276 IsEmpty]: Start isEmpty. Operand 9426 states and 14524 transitions. [2020-10-12 19:48:45,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-10-12 19:48:45,880 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:48:45,880 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:48:45,880 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-12 19:48:45,880 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:48:45,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:48:45,881 INFO L82 PathProgramCache]: Analyzing trace with hash 1284835660, now seen corresponding path program 1 times [2020-10-12 19:48:45,881 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:48:45,881 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1933378657] [2020-10-12 19:48:45,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:48:45,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:48:45,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:48:45,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:48:45,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:48:45,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:48:46,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:48:47,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:48:47,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:48:48,924 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:48:48,925 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-12 19:48:48,925 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 19:48:48,925 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3024 [2020-10-12 19:48:48,925 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:48:48,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 19:48:48,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:48:48,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-12 19:48:48,925 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:48:49,174 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-12 19:48:49,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:48:49,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:48:49,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:48:49,195 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:48:49,195 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:48:49,195 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:48:49,195 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-12 19:48:49,196 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:48:49,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:48:49,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:48:49,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:48:49,196 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:48:49,215 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:48:49,216 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1933378657] [2020-10-12 19:48:49,216 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:48:49,216 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 19:48:49,216 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194803561] [2020-10-12 19:48:49,217 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 19:48:49,217 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:48:49,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 19:48:49,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-12 19:48:49,217 INFO L87 Difference]: Start difference. First operand 9426 states and 14524 transitions. Second operand 6 states. [2020-10-12 19:48:49,454 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-12 19:48:52,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:48:52,401 INFO L93 Difference]: Finished difference Result 28086 states and 43310 transitions. [2020-10-12 19:48:52,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 19:48:52,401 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 96 [2020-10-12 19:48:52,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:48:52,421 INFO L225 Difference]: With dead ends: 28086 [2020-10-12 19:48:52,422 INFO L226 Difference]: Without dead ends: 18724 [2020-10-12 19:48:52,435 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 [2020-10-12 19:48:52,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18724 states. [2020-10-12 19:48:54,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18724 to 18722. [2020-10-12 19:48:54,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18722 states. [2020-10-12 19:48:54,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18722 states to 18722 states and 28788 transitions. [2020-10-12 19:48:54,879 INFO L78 Accepts]: Start accepts. Automaton has 18722 states and 28788 transitions. Word has length 96 [2020-10-12 19:48:54,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:48:54,879 INFO L479 AbstractCegarLoop]: Abstraction has 18722 states and 28788 transitions. [2020-10-12 19:48:54,880 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 19:48:54,880 INFO L276 IsEmpty]: Start isEmpty. Operand 18722 states and 28788 transitions. [2020-10-12 19:48:54,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-10-12 19:48:54,881 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:48:54,881 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:48:54,881 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-12 19:48:54,881 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:48:54,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:48:54,882 INFO L82 PathProgramCache]: Analyzing trace with hash -2036168527, now seen corresponding path program 1 times [2020-10-12 19:48:54,882 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:48:54,882 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [659525596] [2020-10-12 19:48:54,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:48:54,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:48:55,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:48:55,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:48:55,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:48:55,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:48:56,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:48:56,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:48:56,530 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:48:56,530 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-12 19:48:56,530 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 19:48:56,530 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1620 [2020-10-12 19:48:56,531 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:48:56,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:48:56,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-12 19:48:56,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-12 19:48:56,531 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:48:56,741 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-12 19:48:56,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:48:56,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:48:56,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:48:56,754 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:48:56,754 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:48:56,754 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:48:56,754 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-12 19:48:56,755 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:48:56,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:48:56,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:48:56,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:48:56,755 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:48:56,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:48:56,768 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [659525596] [2020-10-12 19:48:56,769 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:48:56,769 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-12 19:48:56,769 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758784540] [2020-10-12 19:48:56,769 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-12 19:48:56,769 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:48:56,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-12 19:48:56,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-12 19:48:56,770 INFO L87 Difference]: Start difference. First operand 18722 states and 28788 transitions. Second operand 4 states. [2020-10-12 19:48:57,000 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 173 [2020-10-12 19:49:02,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:49:02,024 INFO L93 Difference]: Finished difference Result 53990 states and 82902 transitions. [2020-10-12 19:49:02,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 19:49:02,025 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 96 [2020-10-12 19:49:02,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:49:02,061 INFO L225 Difference]: With dead ends: 53990 [2020-10-12 19:49:02,061 INFO L226 Difference]: Without dead ends: 35332 [2020-10-12 19:49:02,082 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 [2020-10-12 19:49:02,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35332 states. [2020-10-12 19:49:06,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35332 to 35330. [2020-10-12 19:49:06,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35330 states. [2020-10-12 19:49:06,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35330 states to 35330 states and 53924 transitions. [2020-10-12 19:49:06,857 INFO L78 Accepts]: Start accepts. Automaton has 35330 states and 53924 transitions. Word has length 96 [2020-10-12 19:49:06,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:49:06,858 INFO L479 AbstractCegarLoop]: Abstraction has 35330 states and 53924 transitions. [2020-10-12 19:49:06,858 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-12 19:49:06,858 INFO L276 IsEmpty]: Start isEmpty. Operand 35330 states and 53924 transitions. [2020-10-12 19:49:06,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-12 19:49:06,859 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:49:06,859 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:49:06,859 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-12 19:49:06,859 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:49:06,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:49:06,860 INFO L82 PathProgramCache]: Analyzing trace with hash -457252865, now seen corresponding path program 1 times [2020-10-12 19:49:06,860 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:49:06,860 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [541632810] [2020-10-12 19:49:06,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:49:06,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:49:06,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:49:06,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:49:06,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:49:07,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:49:07,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:49:07,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:49:08,493 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:49:08,493 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-12 19:49:08,493 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 19:49:08,493 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1613 [2020-10-12 19:49:08,494 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:49:08,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 19:49:08,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:49:08,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-12 19:49:08,494 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:49:08,729 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-12 19:49:08,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:49:08,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:49:08,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:49:08,750 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:49:08,751 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:49:08,751 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:49:08,751 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-12 19:49:08,751 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:49:08,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:49:08,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:49:08,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:49:08,751 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:49:08,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:49:08,770 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [541632810] [2020-10-12 19:49:08,770 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:49:08,770 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 19:49:08,771 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141549135] [2020-10-12 19:49:08,771 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 19:49:08,771 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:49:08,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 19:49:08,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-12 19:49:08,772 INFO L87 Difference]: Start difference. First operand 35330 states and 53924 transitions. Second operand 6 states. [2020-10-12 19:49:09,004 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-12 19:49:19,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:49:19,943 INFO L93 Difference]: Finished difference Result 105606 states and 161126 transitions. [2020-10-12 19:49:19,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 19:49:19,944 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 97 [2020-10-12 19:49:19,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:49:20,019 INFO L225 Difference]: With dead ends: 105606 [2020-10-12 19:49:20,019 INFO L226 Difference]: Without dead ends: 70340 [2020-10-12 19:49:20,052 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 [2020-10-12 19:49:20,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70340 states. [2020-10-12 19:49:30,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70340 to 70338. [2020-10-12 19:49:30,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70338 states. [2020-10-12 19:49:30,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70338 states to 70338 states and 107012 transitions. [2020-10-12 19:49:30,740 INFO L78 Accepts]: Start accepts. Automaton has 70338 states and 107012 transitions. Word has length 97 [2020-10-12 19:49:30,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:49:30,740 INFO L479 AbstractCegarLoop]: Abstraction has 70338 states and 107012 transitions. [2020-10-12 19:49:30,740 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 19:49:30,740 INFO L276 IsEmpty]: Start isEmpty. Operand 70338 states and 107012 transitions. [2020-10-12 19:49:30,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-12 19:49:30,741 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:49:30,742 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:49:30,742 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-12 19:49:30,742 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:49:30,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:49:30,742 INFO L82 PathProgramCache]: Analyzing trace with hash 2036982330, now seen corresponding path program 1 times [2020-10-12 19:49:30,743 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:49:30,743 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [907406487] [2020-10-12 19:49:30,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:49:30,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:49:30,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:49:30,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:49:30,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:49:31,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:49:31,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:49:31,338 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:49:31,339 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-12 19:49:31,339 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 19:49:31,339 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 571 [2020-10-12 19:49:31,339 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:49:31,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:49:31,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-12 19:49:31,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-12 19:49:31,340 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:49:31,535 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-12 19:49:31,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:49:31,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:49:31,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:49:31,546 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:49:31,546 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:49:31,546 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:49:31,546 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 19:49:31,547 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:49:31,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:49:31,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:49:31,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:49:31,547 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:49:31,561 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:49:31,562 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [907406487] [2020-10-12 19:49:31,562 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:49:31,562 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-12 19:49:31,562 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794500436] [2020-10-12 19:49:31,563 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-12 19:49:31,563 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:49:31,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-12 19:49:31,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-12 19:49:31,563 INFO L87 Difference]: Start difference. First operand 70338 states and 107012 transitions. Second operand 4 states. [2020-10-12 19:49:31,777 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification that was a NOOP. DAG size: 173 [2020-10-12 19:49:50,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:49:50,357 INFO L93 Difference]: Finished difference Result 202694 states and 307590 transitions. [2020-10-12 19:49:50,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 19:49:50,358 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 97 [2020-10-12 19:49:50,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:49:50,522 INFO L225 Difference]: With dead ends: 202694 [2020-10-12 19:49:50,522 INFO L226 Difference]: Without dead ends: 132420 [2020-10-12 19:49:50,603 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 [2020-10-12 19:49:50,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132420 states. [2020-10-12 19:50:11,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132420 to 132418. [2020-10-12 19:50:11,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132418 states. [2020-10-12 19:50:11,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132418 states to 132418 states and 199620 transitions. [2020-10-12 19:50:11,226 INFO L78 Accepts]: Start accepts. Automaton has 132418 states and 199620 transitions. Word has length 97 [2020-10-12 19:50:11,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:50:11,226 INFO L479 AbstractCegarLoop]: Abstraction has 132418 states and 199620 transitions. [2020-10-12 19:50:11,226 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-12 19:50:11,226 INFO L276 IsEmpty]: Start isEmpty. Operand 132418 states and 199620 transitions. [2020-10-12 19:50:11,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-10-12 19:50:11,227 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:50:11,227 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:50:11,227 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-12 19:50:11,227 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:50:11,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:50:11,228 INFO L82 PathProgramCache]: Analyzing trace with hash -2146238424, now seen corresponding path program 1 times [2020-10-12 19:50:11,228 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:50:11,228 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [3253488] [2020-10-12 19:50:11,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:50:11,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:50:11,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:50:11,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:50:11,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:50:11,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:50:11,532 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:50:11,532 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-12 19:50:11,532 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 19:50:11,532 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 279 [2020-10-12 19:50:11,532 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:50:11,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:50:11,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 19:50:11,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 87 [2020-10-12 19:50:11,533 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:50:11,737 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 169 [2020-10-12 19:50:11,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:50:11,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:50:11,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:50:11,748 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:50:11,748 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:50:11,748 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:50:11,748 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 19:50:11,748 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:50:11,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:50:11,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:50:11,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:50:11,749 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:50:11,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:50:11,767 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [3253488] [2020-10-12 19:50:11,767 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:50:11,767 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-12 19:50:11,767 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533492462] [2020-10-12 19:50:11,767 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-12 19:50:11,767 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:50:11,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-12 19:50:11,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-12 19:50:11,768 INFO L87 Difference]: Start difference. First operand 132418 states and 199620 transitions. Second operand 4 states. [2020-10-12 19:50:11,996 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification that was a NOOP. DAG size: 173 [2020-10-12 19:50:41,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:50:41,084 INFO L93 Difference]: Finished difference Result 324042 states and 487563 transitions. [2020-10-12 19:50:41,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 19:50:41,085 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 98 [2020-10-12 19:50:41,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:50:41,323 INFO L225 Difference]: With dead ends: 324042 [2020-10-12 19:50:41,323 INFO L226 Difference]: Without dead ends: 191684 [2020-10-12 19:50:41,409 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 [2020-10-12 19:50:41,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191684 states.