/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=NARROWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.2.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 13:49:51,970 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 13:49:51,974 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 13:49:52,022 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 13:49:52,023 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 13:49:52,033 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 13:49:52,035 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 13:49:52,039 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 13:49:52,041 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 13:49:52,042 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 13:49:52,043 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 13:49:52,045 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 13:49:52,045 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 13:49:52,046 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 13:49:52,049 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 13:49:52,051 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 13:49:52,052 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 13:49:52,055 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 13:49:52,057 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 13:49:52,061 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 13:49:52,066 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 13:49:52,067 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 13:49:52,068 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 13:49:52,069 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 13:49:52,073 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 13:49:52,073 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 13:49:52,074 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 13:49:52,077 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 13:49:52,077 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 13:49:52,079 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 13:49:52,080 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 13:49:52,080 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 13:49:52,081 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 13:49:52,082 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 13:49:52,083 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 13:49:52,083 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 13:49:52,084 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 13:49:52,084 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 13:49:52,084 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 13:49:52,086 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 13:49:52,087 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 13:49:52,088 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-13 13:49:52,132 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 13:49:52,133 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 13:49:52,135 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 13:49:52,135 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 13:49:52,135 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 13:49:52,136 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 13:49:52,136 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 13:49:52,136 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 13:49:52,136 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 13:49:52,136 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 13:49:52,137 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 13:49:52,137 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 13:49:52,137 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 13:49:52,137 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 13:49:52,137 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 13:49:52,138 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 13:49:52,138 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 13:49:52,138 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 13:49:52,138 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 13:49:52,138 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 13:49:52,138 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 13:49:52,139 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 13:49:52,139 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 13:49:52,142 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 13:49:52,142 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 13:49:52,142 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 13:49:52,143 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 13:49:52,143 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 13:49:52,143 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 13:49:52,143 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; [2020-10-13 13:49:52,431 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 13:49:52,443 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 13:49:52,446 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 13:49:52,448 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 13:49:52,448 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 13:49:52,449 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.2.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-10-13 13:49:52,512 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/dbf4ab881/063f5161197447f1990bdc3539605e36/FLAG21441b10a [2020-10-13 13:49:53,087 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 13:49:53,087 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.2.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-10-13 13:49:53,107 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/dbf4ab881/063f5161197447f1990bdc3539605e36/FLAG21441b10a [2020-10-13 13:49:53,362 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/dbf4ab881/063f5161197447f1990bdc3539605e36 [2020-10-13 13:49:53,370 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 13:49:53,372 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 13:49:53,373 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 13:49:53,373 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 13:49:53,376 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 13:49:53,377 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 01:49:53" (1/1) ... [2020-10-13 13:49:53,380 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@73fa4179 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:49:53, skipping insertion in model container [2020-10-13 13:49:53,381 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 01:49:53" (1/1) ... [2020-10-13 13:49:53,388 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 13:49:53,430 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 13:49:53,725 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 13:49:53,737 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 13:49:53,944 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 13:49:53,971 INFO L208 MainTranslator]: Completed translation [2020-10-13 13:49:53,972 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:49:53 WrapperNode [2020-10-13 13:49:53,972 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 13:49:53,973 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 13:49:53,973 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 13:49:53,973 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 13:49:53,983 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:49:53" (1/1) ... [2020-10-13 13:49:53,984 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:49:53" (1/1) ... [2020-10-13 13:49:53,998 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:49:53" (1/1) ... [2020-10-13 13:49:53,998 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:49:53" (1/1) ... [2020-10-13 13:49:54,014 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:49:53" (1/1) ... [2020-10-13 13:49:54,026 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:49:53" (1/1) ... [2020-10-13 13:49:54,030 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:49:53" (1/1) ... [2020-10-13 13:49:54,035 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 13:49:54,035 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 13:49:54,035 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 13:49:54,035 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 13:49:54,036 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:49:53" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 13:49:54,104 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 13:49:54,104 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 13:49:54,104 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-13 13:49:54,104 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 13:49:54,105 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 13:49:54,105 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-13 13:49:54,105 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-13 13:49:54,106 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-13 13:49:54,106 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-13 13:49:54,106 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-13 13:49:54,107 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-13 13:49:54,107 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-13 13:49:54,107 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-13 13:49:54,107 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-13 13:49:54,107 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-13 13:49:54,108 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-13 13:49:54,108 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-13 13:49:54,108 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 13:49:54,109 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 13:49:54,109 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 13:49:54,815 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 13:49:54,815 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-13 13:49:54,821 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 01:49:54 BoogieIcfgContainer [2020-10-13 13:49:54,821 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 13:49:54,823 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 13:49:54,823 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 13:49:54,826 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 13:49:54,827 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 01:49:53" (1/3) ... [2020-10-13 13:49:54,828 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25df441f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 01:49:54, skipping insertion in model container [2020-10-13 13:49:54,828 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 01:49:53" (2/3) ... [2020-10-13 13:49:54,828 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25df441f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 01:49:54, skipping insertion in model container [2020-10-13 13:49:54,829 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 01:49:54" (3/3) ... [2020-10-13 13:49:54,830 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_floodmax.3.2.ufo.BOUNDED-6.pals.c.v+cfa-reducer.c [2020-10-13 13:49:54,841 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 13:49:54,850 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 13:49:54,865 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 13:49:54,891 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 13:49:54,892 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 13:49:54,892 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 13:49:54,892 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 13:49:54,892 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 13:49:54,893 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 13:49:54,893 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 13:49:54,893 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 13:49:54,916 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states. [2020-10-13 13:49:54,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-13 13:49:54,926 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:49:54,928 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] [2020-10-13 13:49:54,928 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:49:54,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:49:54,935 INFO L82 PathProgramCache]: Analyzing trace with hash 1817058804, now seen corresponding path program 1 times [2020-10-13 13:49:54,944 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:49:54,945 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1042793737] [2020-10-13 13:49:54,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:49:55,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:49:55,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:49:55,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:49:55,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:49:56,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:49:57,325 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:49:57,326 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-13 13:49:57,326 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 13:49:57,327 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2049 [2020-10-13 13:49:57,331 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:49:57,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 13:49:57,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-13 13:49:57,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 13:49:57,332 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-13 13:49:57,766 WARN L193 SmtUtils]: Spent 279.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-13 13:49:57,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:49:57,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:49:57,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:49:57,794 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:49:57,795 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:49:57,795 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:49:57,795 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-13 13:49:57,795 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:49:57,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:49:57,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:49:57,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:49:57,796 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 13:49:57,824 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 13:49:57,825 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1042793737] [2020-10-13 13:49:57,827 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 13:49:57,828 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-13 13:49:57,829 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731579302] [2020-10-13 13:49:57,837 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 13:49:57,837 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:49:57,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 13:49:57,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-13 13:49:57,856 INFO L87 Difference]: Start difference. First operand 140 states. Second operand 6 states. [2020-10-13 13:49:58,164 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 163 [2020-10-13 13:49:59,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:49:59,059 INFO L93 Difference]: Finished difference Result 632 states and 1063 transitions. [2020-10-13 13:49:59,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 13:49:59,061 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 61 [2020-10-13 13:49:59,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:49:59,081 INFO L225 Difference]: With dead ends: 632 [2020-10-13 13:49:59,081 INFO L226 Difference]: Without dead ends: 526 [2020-10-13 13:49:59,086 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-13 13:49:59,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2020-10-13 13:49:59,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 212. [2020-10-13 13:49:59,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2020-10-13 13:49:59,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 337 transitions. [2020-10-13 13:49:59,159 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 337 transitions. Word has length 61 [2020-10-13 13:49:59,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:49:59,159 INFO L479 AbstractCegarLoop]: Abstraction has 212 states and 337 transitions. [2020-10-13 13:49:59,160 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 13:49:59,160 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 337 transitions. [2020-10-13 13:49:59,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-13 13:49:59,163 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:49:59,163 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] [2020-10-13 13:49:59,163 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 13:49:59,163 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:49:59,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:49:59,164 INFO L82 PathProgramCache]: Analyzing trace with hash 432637612, now seen corresponding path program 1 times [2020-10-13 13:49:59,164 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:49:59,165 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [479592399] [2020-10-13 13:49:59,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:49:59,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:49:59,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:49:59,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:49:59,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:49:59,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:49:59,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:50:01,697 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:50:01,697 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-13 13:50:01,697 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 13:50:01,698 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2499 [2020-10-13 13:50:01,700 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:50:01,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 13:50:01,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-13 13:50:01,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 13:50:01,701 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:50:01,979 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-13 13:50:01,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:50:01,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:50:01,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:50:02,002 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:50:02,003 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:50:02,003 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:50:02,003 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-13 13:50:02,003 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:50:02,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:50:02,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:50:02,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:50:02,014 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 10 [2020-10-13 13:50:02,041 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 13:50:02,042 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [479592399] [2020-10-13 13:50:02,042 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 13:50:02,043 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-13 13:50:02,043 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162883487] [2020-10-13 13:50:02,045 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 13:50:02,045 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:50:02,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 13:50:02,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-13 13:50:02,046 INFO L87 Difference]: Start difference. First operand 212 states and 337 transitions. Second operand 7 states. [2020-10-13 13:50:02,267 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 165 [2020-10-13 13:50:03,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:50:03,324 INFO L93 Difference]: Finished difference Result 1293 states and 2150 transitions. [2020-10-13 13:50:03,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 13:50:03,324 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 62 [2020-10-13 13:50:03,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:50:03,331 INFO L225 Difference]: With dead ends: 1293 [2020-10-13 13:50:03,332 INFO L226 Difference]: Without dead ends: 1139 [2020-10-13 13:50:03,334 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-10-13 13:50:03,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1139 states. [2020-10-13 13:50:03,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1139 to 605. [2020-10-13 13:50:03,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 605 states. [2020-10-13 13:50:03,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 605 states to 605 states and 998 transitions. [2020-10-13 13:50:03,411 INFO L78 Accepts]: Start accepts. Automaton has 605 states and 998 transitions. Word has length 62 [2020-10-13 13:50:03,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:50:03,412 INFO L479 AbstractCegarLoop]: Abstraction has 605 states and 998 transitions. [2020-10-13 13:50:03,412 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 13:50:03,412 INFO L276 IsEmpty]: Start isEmpty. Operand 605 states and 998 transitions. [2020-10-13 13:50:03,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-13 13:50:03,425 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:50:03,425 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] [2020-10-13 13:50:03,426 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 13:50:03,426 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:50:03,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:50:03,426 INFO L82 PathProgramCache]: Analyzing trace with hash 469811643, now seen corresponding path program 1 times [2020-10-13 13:50:03,427 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:50:03,427 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1285366396] [2020-10-13 13:50:03,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:50:03,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:50:03,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:50:03,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:50:03,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:50:03,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:50:04,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:50:05,779 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:50:05,780 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-13 13:50:05,780 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 13:50:05,780 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2318 [2020-10-13 13:50:05,781 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:50:05,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 13:50:05,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-13 13:50:05,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-13 13:50:05,781 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:50:05,967 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-13 13:50:05,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:50:05,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:50:05,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:50:05,987 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:50:05,987 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:50:05,987 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:50:05,987 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-13 13:50:05,988 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:50:05,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:50:05,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:50:05,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:50:05,988 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:50:06,001 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 13:50:06,002 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1285366396] [2020-10-13 13:50:06,003 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 13:50:06,003 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 13:50:06,004 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997021497] [2020-10-13 13:50:06,005 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 13:50:06,005 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:50:06,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 13:50:06,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 13:50:06,007 INFO L87 Difference]: Start difference. First operand 605 states and 998 transitions. Second operand 5 states. [2020-10-13 13:50:06,239 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-13 13:50:06,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:50:06,906 INFO L93 Difference]: Finished difference Result 2113 states and 3536 transitions. [2020-10-13 13:50:06,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 13:50:06,907 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 63 [2020-10-13 13:50:06,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:50:06,919 INFO L225 Difference]: With dead ends: 2113 [2020-10-13 13:50:06,920 INFO L226 Difference]: Without dead ends: 1613 [2020-10-13 13:50:06,924 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 13:50:06,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1613 states. [2020-10-13 13:50:07,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1613 to 1104. [2020-10-13 13:50:07,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1104 states. [2020-10-13 13:50:07,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1104 states to 1104 states and 1835 transitions. [2020-10-13 13:50:07,019 INFO L78 Accepts]: Start accepts. Automaton has 1104 states and 1835 transitions. Word has length 63 [2020-10-13 13:50:07,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:50:07,020 INFO L479 AbstractCegarLoop]: Abstraction has 1104 states and 1835 transitions. [2020-10-13 13:50:07,020 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 13:50:07,020 INFO L276 IsEmpty]: Start isEmpty. Operand 1104 states and 1835 transitions. [2020-10-13 13:50:07,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-13 13:50:07,022 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:50:07,022 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] [2020-10-13 13:50:07,022 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 13:50:07,022 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:50:07,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:50:07,023 INFO L82 PathProgramCache]: Analyzing trace with hash 976019405, now seen corresponding path program 1 times [2020-10-13 13:50:07,024 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:50:07,024 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1434082170] [2020-10-13 13:50:07,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:50:07,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:50:07,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:50:07,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:50:07,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:50:07,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:50:08,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:50:08,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:50:12,082 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:50:12,082 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-13 13:50:12,082 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 13:50:12,082 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-13 13:50:12,083 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:50:12,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 13:50:12,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 48 [2020-10-13 13:50:12,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 13:50:12,084 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 13:50:12,276 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-13 13:50:12,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:50:12,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:50:12,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:50:12,292 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:50:12,292 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:50:12,292 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:50:12,293 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 13:50:12,293 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:50:12,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:50:12,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:50:12,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:50:12,294 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:50:12,305 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 13:50:12,306 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1434082170] [2020-10-13 13:50:12,306 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 13:50:12,306 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 13:50:12,307 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246255281] [2020-10-13 13:50:12,307 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 13:50:12,307 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:50:12,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 13:50:12,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 13:50:12,308 INFO L87 Difference]: Start difference. First operand 1104 states and 1835 transitions. Second operand 4 states. [2020-10-13 13:50:12,496 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-13 13:50:13,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:50:13,353 INFO L93 Difference]: Finished difference Result 2861 states and 4788 transitions. [2020-10-13 13:50:13,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 13:50:13,353 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 64 [2020-10-13 13:50:13,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:50:13,365 INFO L225 Difference]: With dead ends: 2861 [2020-10-13 13:50:13,365 INFO L226 Difference]: Without dead ends: 1829 [2020-10-13 13:50:13,368 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 13:50:13,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1829 states. [2020-10-13 13:50:13,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1829 to 1827. [2020-10-13 13:50:13,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1827 states. [2020-10-13 13:50:13,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1827 states to 1827 states and 3035 transitions. [2020-10-13 13:50:13,493 INFO L78 Accepts]: Start accepts. Automaton has 1827 states and 3035 transitions. Word has length 64 [2020-10-13 13:50:13,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:50:13,494 INFO L479 AbstractCegarLoop]: Abstraction has 1827 states and 3035 transitions. [2020-10-13 13:50:13,494 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 13:50:13,494 INFO L276 IsEmpty]: Start isEmpty. Operand 1827 states and 3035 transitions. [2020-10-13 13:50:13,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-13 13:50:13,497 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:50:13,498 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] [2020-10-13 13:50:13,499 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 13:50:13,499 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:50:13,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:50:13,499 INFO L82 PathProgramCache]: Analyzing trace with hash 1351417111, now seen corresponding path program 1 times [2020-10-13 13:50:13,499 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:50:13,500 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [755601907] [2020-10-13 13:50:13,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:50:13,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:50:13,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:50:13,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:50:13,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:50:13,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:50:13,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:50:14,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:50:15,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:50:18,536 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:50:18,537 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-13 13:50:18,537 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 13:50:18,537 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 13:50:18,537 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:50:18,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 13:50:18,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 49 [2020-10-13 13:50:18,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 13:50:18,538 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:50:18,733 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-13 13:50:18,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:50:18,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:50:18,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:50:18,755 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:50:18,756 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:50:18,756 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:50:18,756 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-13 13:50:18,757 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:50:18,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:50:18,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:50:18,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:50:18,757 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:50:18,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 13:50:18,781 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [755601907] [2020-10-13 13:50:18,782 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 13:50:18,782 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 13:50:18,782 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339675214] [2020-10-13 13:50:18,784 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 13:50:18,784 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:50:18,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 13:50:18,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 13:50:18,785 INFO L87 Difference]: Start difference. First operand 1827 states and 3035 transitions. Second operand 4 states. [2020-10-13 13:50:18,958 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-13 13:50:19,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:50:19,759 INFO L93 Difference]: Finished difference Result 4756 states and 7931 transitions. [2020-10-13 13:50:19,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 13:50:19,759 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 64 [2020-10-13 13:50:19,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:50:19,776 INFO L225 Difference]: With dead ends: 4756 [2020-10-13 13:50:19,776 INFO L226 Difference]: Without dead ends: 3014 [2020-10-13 13:50:19,780 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 13:50:19,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3014 states. [2020-10-13 13:50:19,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3014 to 3012. [2020-10-13 13:50:19,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3012 states. [2020-10-13 13:50:19,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3012 states to 3012 states and 4984 transitions. [2020-10-13 13:50:19,973 INFO L78 Accepts]: Start accepts. Automaton has 3012 states and 4984 transitions. Word has length 64 [2020-10-13 13:50:19,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:50:19,973 INFO L479 AbstractCegarLoop]: Abstraction has 3012 states and 4984 transitions. [2020-10-13 13:50:19,973 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 13:50:19,973 INFO L276 IsEmpty]: Start isEmpty. Operand 3012 states and 4984 transitions. [2020-10-13 13:50:19,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-13 13:50:19,974 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:50:19,974 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] [2020-10-13 13:50:19,975 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 13:50:19,975 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:50:19,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:50:19,975 INFO L82 PathProgramCache]: Analyzing trace with hash 1626764627, now seen corresponding path program 1 times [2020-10-13 13:50:19,976 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:50:19,976 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1983202035] [2020-10-13 13:50:19,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:50:19,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:50:20,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:50:20,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:50:20,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:50:20,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:50:20,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:50:21,509 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:50:21,509 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-13 13:50:21,510 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 13:50:21,510 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1509 [2020-10-13 13:50:21,510 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:50:21,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 13:50:21,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-10-13 13:50:21,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-13 13:50:21,511 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:50:21,732 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-13 13:50:21,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:50:21,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:50:21,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:50:21,750 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:50:21,750 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:50:21,751 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:50:21,751 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-13 13:50:21,751 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:50:21,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:50:21,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:50:21,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:50:21,753 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 13:50:21,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 13:50:21,773 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1983202035] [2020-10-13 13:50:21,773 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 13:50:21,773 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 13:50:21,774 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038914204] [2020-10-13 13:50:21,774 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 13:50:21,775 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:50:21,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 13:50:21,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 13:50:21,776 INFO L87 Difference]: Start difference. First operand 3012 states and 4984 transitions. Second operand 5 states. [2020-10-13 13:50:22,044 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-13 13:50:23,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:50:23,395 INFO L93 Difference]: Finished difference Result 11772 states and 19543 transitions. [2020-10-13 13:50:23,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 13:50:23,395 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 64 [2020-10-13 13:50:23,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:50:23,442 INFO L225 Difference]: With dead ends: 11772 [2020-10-13 13:50:23,442 INFO L226 Difference]: Without dead ends: 8852 [2020-10-13 13:50:23,451 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 13:50:23,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8852 states. [2020-10-13 13:50:23,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8852 to 5874. [2020-10-13 13:50:23,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5874 states. [2020-10-13 13:50:23,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5874 states to 5874 states and 9692 transitions. [2020-10-13 13:50:23,879 INFO L78 Accepts]: Start accepts. Automaton has 5874 states and 9692 transitions. Word has length 64 [2020-10-13 13:50:23,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:50:23,880 INFO L479 AbstractCegarLoop]: Abstraction has 5874 states and 9692 transitions. [2020-10-13 13:50:23,880 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 13:50:23,880 INFO L276 IsEmpty]: Start isEmpty. Operand 5874 states and 9692 transitions. [2020-10-13 13:50:23,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-13 13:50:23,881 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:50:23,881 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] [2020-10-13 13:50:23,881 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 13:50:23,881 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:50:23,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:50:23,882 INFO L82 PathProgramCache]: Analyzing trace with hash 623095309, now seen corresponding path program 1 times [2020-10-13 13:50:23,882 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:50:23,882 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2029966348] [2020-10-13 13:50:23,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:50:23,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:50:23,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:50:23,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:50:23,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:50:24,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:50:24,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:50:24,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:50:25,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:50:28,912 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:50:28,912 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-13 13:50:28,912 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 13:50:28,913 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-13 13:50:28,913 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:50:28,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 13:50:28,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 50 [2020-10-13 13:50:28,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 13:50:28,914 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:50:29,114 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-13 13:50:29,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:50:29,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:50:29,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:50:29,132 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:50:29,132 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:50:29,133 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:50:29,133 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-13 13:50:29,133 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:50:29,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:50:29,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:50:29,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:50:29,135 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 13:50:29,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 13:50:29,154 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2029966348] [2020-10-13 13:50:29,155 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 13:50:29,155 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 13:50:29,155 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079134948] [2020-10-13 13:50:29,157 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 13:50:29,157 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:50:29,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 13:50:29,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 13:50:29,158 INFO L87 Difference]: Start difference. First operand 5874 states and 9692 transitions. Second operand 4 states. [2020-10-13 13:50:29,431 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification that was a NOOP. DAG size: 161 [2020-10-13 13:50:30,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:50:30,955 INFO L93 Difference]: Finished difference Result 15366 states and 25342 transitions. [2020-10-13 13:50:30,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 13:50:30,955 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 64 [2020-10-13 13:50:30,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:50:31,020 INFO L225 Difference]: With dead ends: 15366 [2020-10-13 13:50:31,020 INFO L226 Difference]: Without dead ends: 9578 [2020-10-13 13:50:31,038 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 13:50:31,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9578 states. [2020-10-13 13:50:31,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9578 to 9548. [2020-10-13 13:50:31,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9548 states. [2020-10-13 13:50:31,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9548 states to 9548 states and 15613 transitions. [2020-10-13 13:50:31,782 INFO L78 Accepts]: Start accepts. Automaton has 9548 states and 15613 transitions. Word has length 64 [2020-10-13 13:50:31,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:50:31,782 INFO L479 AbstractCegarLoop]: Abstraction has 9548 states and 15613 transitions. [2020-10-13 13:50:31,783 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 13:50:31,783 INFO L276 IsEmpty]: Start isEmpty. Operand 9548 states and 15613 transitions. [2020-10-13 13:50:31,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-13 13:50:31,784 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:50:31,784 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] [2020-10-13 13:50:31,784 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 13:50:31,784 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:50:31,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:50:31,785 INFO L82 PathProgramCache]: Analyzing trace with hash -1536924829, now seen corresponding path program 1 times [2020-10-13 13:50:31,785 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:50:31,785 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2078379537] [2020-10-13 13:50:31,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:50:31,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:50:31,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:50:31,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:50:31,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:50:31,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:50:32,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:50:32,421 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:50:32,421 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-13 13:50:32,422 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 13:50:32,422 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 617 [2020-10-13 13:50:32,422 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:50:32,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 13:50:32,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 54 [2020-10-13 13:50:32,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 13:50:32,422 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:50:32,641 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-13 13:50:32,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:50:32,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:50:32,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:50:32,659 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:50:32,660 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:50:32,660 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:50:32,660 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-13 13:50:32,661 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:50:32,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:50:32,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:50:32,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:50:32,662 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 13:50:32,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 13:50:32,689 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2078379537] [2020-10-13 13:50:32,689 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 13:50:32,689 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 13:50:32,690 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970218034] [2020-10-13 13:50:32,690 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 13:50:32,691 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:50:32,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 13:50:32,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 13:50:32,692 INFO L87 Difference]: Start difference. First operand 9548 states and 15613 transitions. Second operand 4 states. [2020-10-13 13:50:34,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:50:34,412 INFO L93 Difference]: Finished difference Result 22744 states and 36959 transitions. [2020-10-13 13:50:34,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 13:50:34,413 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 66 [2020-10-13 13:50:34,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:50:34,449 INFO L225 Difference]: With dead ends: 22744 [2020-10-13 13:50:34,449 INFO L226 Difference]: Without dead ends: 13254 [2020-10-13 13:50:34,470 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 13:50:34,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13254 states. [2020-10-13 13:50:35,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13254 to 13252. [2020-10-13 13:50:35,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13252 states. [2020-10-13 13:50:35,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13252 states to 13252 states and 20989 transitions. [2020-10-13 13:50:35,118 INFO L78 Accepts]: Start accepts. Automaton has 13252 states and 20989 transitions. Word has length 66 [2020-10-13 13:50:35,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:50:35,118 INFO L479 AbstractCegarLoop]: Abstraction has 13252 states and 20989 transitions. [2020-10-13 13:50:35,118 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 13:50:35,118 INFO L276 IsEmpty]: Start isEmpty. Operand 13252 states and 20989 transitions. [2020-10-13 13:50:35,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-13 13:50:35,119 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:50:35,119 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] [2020-10-13 13:50:35,120 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 13:50:35,120 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:50:35,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:50:35,120 INFO L82 PathProgramCache]: Analyzing trace with hash -1641363507, now seen corresponding path program 1 times [2020-10-13 13:50:35,120 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:50:35,121 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [635984487] [2020-10-13 13:50:35,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:50:35,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:50:35,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:50:35,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:50:35,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:50:35,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:50:35,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:50:36,021 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:50:36,021 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-13 13:50:36,021 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 13:50:36,022 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 879 [2020-10-13 13:50:36,022 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:50:36,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 13:50:36,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-13 13:50:36,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-13 13:50:36,023 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 13:50:36,233 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-13 13:50:36,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:50:36,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:50:36,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:50:36,251 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:50:36,251 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:50:36,252 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:50:36,252 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-13 13:50:36,252 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:50:36,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:50:36,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:50:36,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:50:36,254 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 13:50:36,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 13:50:36,270 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [635984487] [2020-10-13 13:50:36,271 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 13:50:36,271 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 13:50:36,271 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239453530] [2020-10-13 13:50:36,271 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 13:50:36,272 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:50:36,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 13:50:36,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 13:50:36,272 INFO L87 Difference]: Start difference. First operand 13252 states and 20989 transitions. Second operand 4 states. [2020-10-13 13:50:36,506 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-13 13:50:37,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:50:37,667 INFO L93 Difference]: Finished difference Result 28830 states and 45765 transitions. [2020-10-13 13:50:37,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 13:50:37,667 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 67 [2020-10-13 13:50:37,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:50:37,711 INFO L225 Difference]: With dead ends: 28830 [2020-10-13 13:50:37,712 INFO L226 Difference]: Without dead ends: 15636 [2020-10-13 13:50:37,739 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 13:50:37,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15636 states. [2020-10-13 13:50:38,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15636 to 15634. [2020-10-13 13:50:38,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15634 states. [2020-10-13 13:50:38,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15634 states to 15634 states and 24663 transitions. [2020-10-13 13:50:38,590 INFO L78 Accepts]: Start accepts. Automaton has 15634 states and 24663 transitions. Word has length 67 [2020-10-13 13:50:38,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:50:38,590 INFO L479 AbstractCegarLoop]: Abstraction has 15634 states and 24663 transitions. [2020-10-13 13:50:38,590 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 13:50:38,591 INFO L276 IsEmpty]: Start isEmpty. Operand 15634 states and 24663 transitions. [2020-10-13 13:50:38,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-13 13:50:38,591 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:50:38,591 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] [2020-10-13 13:50:38,592 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 13:50:38,592 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:50:38,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:50:38,592 INFO L82 PathProgramCache]: Analyzing trace with hash 1425535542, now seen corresponding path program 1 times [2020-10-13 13:50:38,592 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:50:38,593 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1305804972] [2020-10-13 13:50:38,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:50:38,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:50:38,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:50:38,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:50:38,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:50:38,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:50:39,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:50:40,542 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:50:40,542 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-13 13:50:40,543 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 13:50:40,543 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1929 [2020-10-13 13:50:40,543 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:50:40,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 13:50:40,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 42 [2020-10-13 13:50:40,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-13 13:50:40,544 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:50:40,770 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-13 13:50:40,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:50:40,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:50:40,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:50:40,786 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:50:40,786 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:50:40,786 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:50:40,786 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-13 13:50:40,787 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:50:40,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:50:40,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:50:40,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:50:40,787 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:50:40,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 13:50:40,808 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1305804972] [2020-10-13 13:50:40,808 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 13:50:40,808 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-13 13:50:40,808 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787438613] [2020-10-13 13:50:40,809 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 13:50:40,809 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:50:40,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 13:50:40,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-13 13:50:40,809 INFO L87 Difference]: Start difference. First operand 15634 states and 24663 transitions. Second operand 6 states. [2020-10-13 13:50:41,045 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2020-10-13 13:50:42,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:50:42,966 INFO L93 Difference]: Finished difference Result 46770 states and 73905 transitions. [2020-10-13 13:50:42,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 13:50:42,967 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 68 [2020-10-13 13:50:42,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:50:43,059 INFO L225 Difference]: With dead ends: 46770 [2020-10-13 13:50:43,059 INFO L226 Difference]: Without dead ends: 31196 [2020-10-13 13:50:43,087 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-13 13:50:43,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31196 states. [2020-10-13 13:50:43,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31196 to 15634. [2020-10-13 13:50:43,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15634 states. [2020-10-13 13:50:43,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15634 states to 15634 states and 24571 transitions. [2020-10-13 13:50:43,990 INFO L78 Accepts]: Start accepts. Automaton has 15634 states and 24571 transitions. Word has length 68 [2020-10-13 13:50:43,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:50:43,990 INFO L479 AbstractCegarLoop]: Abstraction has 15634 states and 24571 transitions. [2020-10-13 13:50:43,990 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 13:50:43,990 INFO L276 IsEmpty]: Start isEmpty. Operand 15634 states and 24571 transitions. [2020-10-13 13:50:43,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-13 13:50:43,991 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:50:43,991 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] [2020-10-13 13:50:43,991 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 13:50:43,992 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:50:43,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:50:43,992 INFO L82 PathProgramCache]: Analyzing trace with hash 1738168665, now seen corresponding path program 1 times [2020-10-13 13:50:43,992 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:50:43,992 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1639265565] [2020-10-13 13:50:43,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:50:44,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:50:44,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:50:44,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:50:44,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:50:44,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:50:44,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:50:45,829 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:50:45,829 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-13 13:50:45,829 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 13:50:45,829 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1814 [2020-10-13 13:50:45,830 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:50:45,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 13:50:45,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 45 [2020-10-13 13:50:45,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-13 13:50:45,830 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:50:46,053 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-13 13:50:46,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:50:46,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:50:46,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:50:46,065 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:50:46,066 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:50:46,066 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:50:46,066 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 13:50:46,066 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:50:46,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:50:46,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:50:46,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:50:46,067 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:50:46,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 13:50:46,085 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1639265565] [2020-10-13 13:50:46,085 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 13:50:46,085 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-13 13:50:46,085 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351389942] [2020-10-13 13:50:46,086 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 13:50:46,086 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:50:46,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 13:50:46,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-13 13:50:46,087 INFO L87 Difference]: Start difference. First operand 15634 states and 24571 transitions. Second operand 6 states. [2020-10-13 13:50:46,324 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 168 [2020-10-13 13:50:49,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:50:49,826 INFO L93 Difference]: Finished difference Result 74570 states and 117533 transitions. [2020-10-13 13:50:49,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 13:50:49,827 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 71 [2020-10-13 13:50:49,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:50:49,919 INFO L225 Difference]: With dead ends: 74570 [2020-10-13 13:50:49,919 INFO L226 Difference]: Without dead ends: 58996 [2020-10-13 13:50:49,952 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-13 13:50:50,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58996 states. [2020-10-13 13:50:51,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58996 to 29290. [2020-10-13 13:50:51,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29290 states. [2020-10-13 13:50:51,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29290 states to 29290 states and 45839 transitions. [2020-10-13 13:50:51,978 INFO L78 Accepts]: Start accepts. Automaton has 29290 states and 45839 transitions. Word has length 71 [2020-10-13 13:50:51,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:50:51,978 INFO L479 AbstractCegarLoop]: Abstraction has 29290 states and 45839 transitions. [2020-10-13 13:50:51,978 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 13:50:51,978 INFO L276 IsEmpty]: Start isEmpty. Operand 29290 states and 45839 transitions. [2020-10-13 13:50:51,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-13 13:50:51,979 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:50:51,979 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] [2020-10-13 13:50:51,980 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 13:50:51,980 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:50:51,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:50:51,980 INFO L82 PathProgramCache]: Analyzing trace with hash -1953255533, now seen corresponding path program 1 times [2020-10-13 13:50:51,980 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:50:51,986 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [319383573] [2020-10-13 13:50:51,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:50:52,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:50:52,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:50:52,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:50:52,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:50:52,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:50:52,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:50:54,445 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:50:54,445 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-13 13:50:54,445 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 13:50:54,445 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2430 [2020-10-13 13:50:54,445 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:50:54,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 13:50:54,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 74 [2020-10-13 13:50:54,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-13 13:50:54,446 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:50:54,643 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-13 13:50:54,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:50:54,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:50:54,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:50:54,657 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:50:54,657 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:50:54,657 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:50:54,658 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 13:50:54,658 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:50:54,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:50:54,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:50:54,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:50:54,658 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:50:54,669 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 13:50:54,669 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [319383573] [2020-10-13 13:50:54,669 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 13:50:54,670 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 13:50:54,670 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856667929] [2020-10-13 13:50:54,670 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 13:50:54,671 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:50:54,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 13:50:54,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 13:50:54,671 INFO L87 Difference]: Start difference. First operand 29290 states and 45839 transitions. Second operand 5 states. [2020-10-13 13:50:57,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:50:57,808 INFO L93 Difference]: Finished difference Result 42042 states and 65146 transitions. [2020-10-13 13:50:57,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 13:50:57,808 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 72 [2020-10-13 13:50:57,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:50:57,859 INFO L225 Difference]: With dead ends: 42042 [2020-10-13 13:50:57,859 INFO L226 Difference]: Without dead ends: 42040 [2020-10-13 13:50:57,868 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 13:50:57,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42040 states. [2020-10-13 13:51:00,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42040 to 29626. [2020-10-13 13:51:00,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29626 states. [2020-10-13 13:51:00,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29626 states to 29626 states and 46155 transitions. [2020-10-13 13:51:00,676 INFO L78 Accepts]: Start accepts. Automaton has 29626 states and 46155 transitions. Word has length 72 [2020-10-13 13:51:00,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:51:00,676 INFO L479 AbstractCegarLoop]: Abstraction has 29626 states and 46155 transitions. [2020-10-13 13:51:00,676 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 13:51:00,676 INFO L276 IsEmpty]: Start isEmpty. Operand 29626 states and 46155 transitions. [2020-10-13 13:51:00,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-13 13:51:00,680 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:51:00,680 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 13:51:00,681 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 13:51:00,681 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:51:00,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:51:00,681 INFO L82 PathProgramCache]: Analyzing trace with hash 1966376265, now seen corresponding path program 1 times [2020-10-13 13:51:00,681 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:51:00,682 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [584211839] [2020-10-13 13:51:00,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:51:00,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:51:00,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:00,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:00,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:00,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:01,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:01,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:01,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:01,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:05,717 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:51:05,718 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-13 13:51:05,718 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 13:51:05,718 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-13 13:51:05,718 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:51:05,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 13:51:05,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 60 [2020-10-13 13:51:05,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-13 13:51:05,719 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:51:05,932 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-13 13:51:05,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:51:05,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:51:05,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:05,945 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:51:05,945 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:51:05,945 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:51:05,945 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 13:51:05,945 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:51:05,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:51:05,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:51:05,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:51:05,946 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:51:05,957 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 13:51:05,958 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [584211839] [2020-10-13 13:51:05,958 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 13:51:05,958 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 13:51:05,959 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909731844] [2020-10-13 13:51:05,959 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 13:51:05,959 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:51:05,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 13:51:05,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 13:51:05,960 INFO L87 Difference]: Start difference. First operand 29626 states and 46155 transitions. Second operand 4 states. [2020-10-13 13:51:08,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:51:08,457 INFO L93 Difference]: Finished difference Result 59194 states and 92233 transitions. [2020-10-13 13:51:08,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 13:51:08,458 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 89 [2020-10-13 13:51:08,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:51:08,495 INFO L225 Difference]: With dead ends: 59194 [2020-10-13 13:51:08,496 INFO L226 Difference]: Without dead ends: 29628 [2020-10-13 13:51:08,531 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 13:51:08,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29628 states. [2020-10-13 13:51:10,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29628 to 29626. [2020-10-13 13:51:10,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29626 states. [2020-10-13 13:51:10,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29626 states to 29626 states and 45793 transitions. [2020-10-13 13:51:10,235 INFO L78 Accepts]: Start accepts. Automaton has 29626 states and 45793 transitions. Word has length 89 [2020-10-13 13:51:10,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:51:10,235 INFO L479 AbstractCegarLoop]: Abstraction has 29626 states and 45793 transitions. [2020-10-13 13:51:10,235 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 13:51:10,235 INFO L276 IsEmpty]: Start isEmpty. Operand 29626 states and 45793 transitions. [2020-10-13 13:51:10,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-10-13 13:51:10,237 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:51:10,238 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 13:51:10,238 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 13:51:10,238 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:51:10,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:51:10,238 INFO L82 PathProgramCache]: Analyzing trace with hash -289256817, now seen corresponding path program 1 times [2020-10-13 13:51:10,238 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:51:10,239 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [978970605] [2020-10-13 13:51:10,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:51:10,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:51:10,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:10,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:10,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:10,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:10,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:11,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:11,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:11,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:11,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:11,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:12,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:15,255 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:51:15,256 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-13 13:51:15,256 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-13 13:51:15,256 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 13:51:15,256 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:51:15,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 13:51:15,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-13 13:51:15,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-13 13:51:15,257 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:51:15,510 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-13 13:51:15,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:51:15,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:51:15,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:15,523 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:51:15,523 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:51:15,524 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:51:15,524 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 13:51:15,524 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:51:15,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:51:15,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:51:15,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:51:15,525 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:51:15,537 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-13 13:51:15,538 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [978970605] [2020-10-13 13:51:15,538 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 13:51:15,538 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 13:51:15,538 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [321595600] [2020-10-13 13:51:15,539 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 13:51:15,539 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:51:15,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 13:51:15,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 13:51:15,539 INFO L87 Difference]: Start difference. First operand 29626 states and 45793 transitions. Second operand 4 states. [2020-10-13 13:51:15,720 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-13 13:51:17,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:51:17,862 INFO L93 Difference]: Finished difference Result 59270 states and 91619 transitions. [2020-10-13 13:51:17,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 13:51:17,863 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 91 [2020-10-13 13:51:17,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:51:17,924 INFO L225 Difference]: With dead ends: 59270 [2020-10-13 13:51:17,924 INFO L226 Difference]: Without dead ends: 29704 [2020-10-13 13:51:17,969 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 13:51:18,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29704 states. [2020-10-13 13:51:19,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29704 to 29640. [2020-10-13 13:51:19,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29640 states. [2020-10-13 13:51:19,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29640 states to 29640 states and 45813 transitions. [2020-10-13 13:51:19,888 INFO L78 Accepts]: Start accepts. Automaton has 29640 states and 45813 transitions. Word has length 91 [2020-10-13 13:51:19,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:51:19,888 INFO L479 AbstractCegarLoop]: Abstraction has 29640 states and 45813 transitions. [2020-10-13 13:51:19,888 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 13:51:19,888 INFO L276 IsEmpty]: Start isEmpty. Operand 29640 states and 45813 transitions. [2020-10-13 13:51:19,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-10-13 13:51:19,890 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:51:19,890 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 13:51:19,890 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 13:51:19,891 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:51:19,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:51:19,891 INFO L82 PathProgramCache]: Analyzing trace with hash 761499170, now seen corresponding path program 1 times [2020-10-13 13:51:19,891 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:51:19,891 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [845229131] [2020-10-13 13:51:19,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:51:19,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:51:19,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:19,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:19,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:19,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:20,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:20,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:22,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:22,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:22,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:22,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:22,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:24,920 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:51:24,920 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-13 13:51:24,920 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-13 13:51:24,920 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 13:51:24,920 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:51:24,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 13:51:24,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-13 13:51:24,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-13 13:51:24,921 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:51:25,099 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-13 13:51:25,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:51:25,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:51:25,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:25,110 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:51:25,111 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:51:25,111 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:51:25,111 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 13:51:25,111 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:51:25,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:51:25,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:51:25,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:51:25,111 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:51:25,121 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-13 13:51:25,122 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [845229131] [2020-10-13 13:51:25,122 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 13:51:25,122 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 13:51:25,122 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082471170] [2020-10-13 13:51:25,123 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 13:51:25,123 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:51:25,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 13:51:25,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 13:51:25,123 INFO L87 Difference]: Start difference. First operand 29640 states and 45813 transitions. Second operand 4 states. [2020-10-13 13:51:25,308 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 159 [2020-10-13 13:51:27,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:51:27,873 INFO L93 Difference]: Finished difference Result 66763 states and 103119 transitions. [2020-10-13 13:51:27,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 13:51:27,874 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 93 [2020-10-13 13:51:27,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:51:27,943 INFO L225 Difference]: With dead ends: 66763 [2020-10-13 13:51:27,943 INFO L226 Difference]: Without dead ends: 37197 [2020-10-13 13:51:27,980 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 13:51:28,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37197 states. [2020-10-13 13:51:30,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37197 to 37195. [2020-10-13 13:51:30,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37195 states. [2020-10-13 13:51:30,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37195 states to 37195 states and 57229 transitions. [2020-10-13 13:51:30,311 INFO L78 Accepts]: Start accepts. Automaton has 37195 states and 57229 transitions. Word has length 93 [2020-10-13 13:51:30,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:51:30,311 INFO L479 AbstractCegarLoop]: Abstraction has 37195 states and 57229 transitions. [2020-10-13 13:51:30,311 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 13:51:30,311 INFO L276 IsEmpty]: Start isEmpty. Operand 37195 states and 57229 transitions. [2020-10-13 13:51:30,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-13 13:51:30,313 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:51:30,313 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 13:51:30,313 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 13:51:30,313 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:51:30,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:51:30,314 INFO L82 PathProgramCache]: Analyzing trace with hash 23566461, now seen corresponding path program 1 times [2020-10-13 13:51:30,314 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:51:30,314 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [22756377] [2020-10-13 13:51:30,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:51:30,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:51:30,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:30,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:30,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:30,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:30,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:30,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:30,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:31,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:31,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:31,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:31,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:31,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:32,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:35,344 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:51:35,344 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-13 13:51:35,344 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-13 13:51:35,344 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-13 13:51:35,344 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:51:35,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 13:51:35,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 13:51:35,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-13 13:51:35,345 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:51:35,537 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-13 13:51:35,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:51:35,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:51:35,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:35,545 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:51:35,546 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:51:35,546 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:51:35,546 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 13:51:35,546 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:51:35,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:51:35,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:51:35,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:51:35,546 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:51:35,560 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-13 13:51:35,560 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [22756377] [2020-10-13 13:51:35,560 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 13:51:35,561 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 13:51:35,561 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496236475] [2020-10-13 13:51:35,561 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 13:51:35,561 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:51:35,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 13:51:35,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 13:51:35,562 INFO L87 Difference]: Start difference. First operand 37195 states and 57229 transitions. Second operand 5 states. [2020-10-13 13:51:41,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:51:41,385 INFO L93 Difference]: Finished difference Result 109597 states and 168482 transitions. [2020-10-13 13:51:41,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 13:51:41,386 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 97 [2020-10-13 13:51:41,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:51:41,474 INFO L225 Difference]: With dead ends: 109597 [2020-10-13 13:51:41,475 INFO L226 Difference]: Without dead ends: 72415 [2020-10-13 13:51:41,503 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 13:51:41,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72415 states. [2020-10-13 13:51:46,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72415 to 72413. [2020-10-13 13:51:46,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72413 states. [2020-10-13 13:51:46,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72413 states to 72413 states and 110441 transitions. [2020-10-13 13:51:46,152 INFO L78 Accepts]: Start accepts. Automaton has 72413 states and 110441 transitions. Word has length 97 [2020-10-13 13:51:46,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:51:46,152 INFO L479 AbstractCegarLoop]: Abstraction has 72413 states and 110441 transitions. [2020-10-13 13:51:46,152 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 13:51:46,153 INFO L276 IsEmpty]: Start isEmpty. Operand 72413 states and 110441 transitions. [2020-10-13 13:51:46,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-10-13 13:51:46,157 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:51:46,157 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 13:51:46,157 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 13:51:46,157 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:51:46,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:51:46,157 INFO L82 PathProgramCache]: Analyzing trace with hash -990714027, now seen corresponding path program 1 times [2020-10-13 13:51:46,158 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:51:46,158 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1096135778] [2020-10-13 13:51:46,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:51:46,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:51:46,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:46,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:46,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:46,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:46,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:46,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:46,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:48,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:48,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:48,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:48,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:52,018 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:51:52,018 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-13 13:51:52,018 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-13 13:51:52,019 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5846 [2020-10-13 13:51:52,019 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:51:52,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 13:51:52,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 13:51:52,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-13 13:51:52,019 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:51:52,187 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-13 13:51:52,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:51:52,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:51:52,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:51:52,197 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:51:52,197 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:51:52,197 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:51:52,197 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 13:51:52,197 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:51:52,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:51:52,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:51:52,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:51:52,198 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:51:52,210 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-13 13:51:52,211 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1096135778] [2020-10-13 13:51:52,211 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 13:51:52,211 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 13:51:52,211 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103419958] [2020-10-13 13:51:52,212 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 13:51:52,212 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:51:52,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 13:51:52,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 13:51:52,213 INFO L87 Difference]: Start difference. First operand 72413 states and 110441 transitions. Second operand 4 states. [2020-10-13 13:52:01,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:52:01,843 INFO L93 Difference]: Finished difference Result 217193 states and 331253 transitions. [2020-10-13 13:52:01,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 13:52:01,844 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 98 [2020-10-13 13:52:01,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:52:02,048 INFO L225 Difference]: With dead ends: 217193 [2020-10-13 13:52:02,048 INFO L226 Difference]: Without dead ends: 144812 [2020-10-13 13:52:02,110 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 13:52:02,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144812 states. [2020-10-13 13:52:10,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144812 to 72415. [2020-10-13 13:52:10,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72415 states. [2020-10-13 13:52:10,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72415 states to 72415 states and 110443 transitions. [2020-10-13 13:52:10,206 INFO L78 Accepts]: Start accepts. Automaton has 72415 states and 110443 transitions. Word has length 98 [2020-10-13 13:52:10,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:52:10,206 INFO L479 AbstractCegarLoop]: Abstraction has 72415 states and 110443 transitions. [2020-10-13 13:52:10,206 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 13:52:10,206 INFO L276 IsEmpty]: Start isEmpty. Operand 72415 states and 110443 transitions. [2020-10-13 13:52:10,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-13 13:52:10,210 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:52:10,210 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 13:52:10,210 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 13:52:10,210 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:52:10,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:52:10,211 INFO L82 PathProgramCache]: Analyzing trace with hash -2046176548, now seen corresponding path program 1 times [2020-10-13 13:52:10,211 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:52:10,211 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1861644870] [2020-10-13 13:52:10,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:52:10,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:52:10,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:10,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:10,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:10,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:10,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:10,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:10,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:10,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:15,240 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:52:15,240 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 105 [2020-10-13 13:52:15,240 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-13 13:52:15,240 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 13:52:15,240 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:52:15,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 13:52:15,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-13 13:52:15,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-13 13:52:15,241 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:52:15,453 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-13 13:52:15,454 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:52:15,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:52:15,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:15,463 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:52:15,463 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:52:15,464 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:52:15,464 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 13:52:15,464 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:52:15,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:52:15,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:52:15,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:52:15,464 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:52:15,477 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-13 13:52:15,477 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1861644870] [2020-10-13 13:52:15,477 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 13:52:15,477 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 13:52:15,478 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029596857] [2020-10-13 13:52:15,478 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 13:52:15,478 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:52:15,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 13:52:15,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 13:52:15,479 INFO L87 Difference]: Start difference. First operand 72415 states and 110443 transitions. Second operand 5 states. [2020-10-13 13:52:21,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:52:21,095 INFO L93 Difference]: Finished difference Result 144812 states and 220861 transitions. [2020-10-13 13:52:21,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 13:52:21,095 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 99 [2020-10-13 13:52:21,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:52:21,191 INFO L225 Difference]: With dead ends: 144812 [2020-10-13 13:52:21,191 INFO L226 Difference]: Without dead ends: 72415 [2020-10-13 13:52:21,240 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 13:52:21,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72415 states. [2020-10-13 13:52:26,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72415 to 72414. [2020-10-13 13:52:26,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72414 states. [2020-10-13 13:52:26,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72414 states to 72414 states and 110440 transitions. [2020-10-13 13:52:26,729 INFO L78 Accepts]: Start accepts. Automaton has 72414 states and 110440 transitions. Word has length 99 [2020-10-13 13:52:26,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:52:26,730 INFO L479 AbstractCegarLoop]: Abstraction has 72414 states and 110440 transitions. [2020-10-13 13:52:26,730 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 13:52:26,730 INFO L276 IsEmpty]: Start isEmpty. Operand 72414 states and 110440 transitions. [2020-10-13 13:52:26,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-13 13:52:26,733 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:52:26,733 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 13:52:26,733 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-13 13:52:26,734 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:52:26,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:52:26,734 INFO L82 PathProgramCache]: Analyzing trace with hash -1194661056, now seen corresponding path program 1 times [2020-10-13 13:52:26,734 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:52:26,734 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1915264198] [2020-10-13 13:52:26,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:52:26,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:52:26,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:26,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:26,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:26,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:26,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:26,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:26,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:27,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:27,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:27,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:31,765 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:52:31,765 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 105 [2020-10-13 13:52:31,765 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-13 13:52:31,765 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-13 13:52:31,765 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:52:31,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 13:52:31,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 13:52:31,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 13:52:31,766 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:52:31,980 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-13 13:52:31,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:52:31,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:52:31,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:31,995 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:52:31,996 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:52:31,996 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:52:31,996 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-13 13:52:31,996 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:52:31,996 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:52:31,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:52:31,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:52:31,997 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:52:32,013 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-13 13:52:32,013 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1915264198] [2020-10-13 13:52:32,013 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 13:52:32,013 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 13:52:32,014 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630349794] [2020-10-13 13:52:32,014 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 13:52:32,014 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:52:32,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 13:52:32,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 13:52:32,015 INFO L87 Difference]: Start difference. First operand 72414 states and 110440 transitions. Second operand 5 states. [2020-10-13 13:52:43,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:52:43,833 INFO L93 Difference]: Finished difference Result 217184 states and 331232 transitions. [2020-10-13 13:52:43,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 13:52:43,834 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 99 [2020-10-13 13:52:43,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:52:44,029 INFO L225 Difference]: With dead ends: 217184 [2020-10-13 13:52:44,029 INFO L226 Difference]: Without dead ends: 144809 [2020-10-13 13:52:44,089 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 13:52:44,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144809 states. [2020-10-13 13:52:52,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144809 to 72444. [2020-10-13 13:52:52,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72444 states. [2020-10-13 13:52:52,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72444 states to 72444 states and 110485 transitions. [2020-10-13 13:52:52,916 INFO L78 Accepts]: Start accepts. Automaton has 72444 states and 110485 transitions. Word has length 99 [2020-10-13 13:52:52,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:52:52,916 INFO L479 AbstractCegarLoop]: Abstraction has 72444 states and 110485 transitions. [2020-10-13 13:52:52,916 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 13:52:52,916 INFO L276 IsEmpty]: Start isEmpty. Operand 72444 states and 110485 transitions. [2020-10-13 13:52:52,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-13 13:52:52,919 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:52:52,919 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 13:52:52,919 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-13 13:52:52,920 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:52:52,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:52:52,920 INFO L82 PathProgramCache]: Analyzing trace with hash 1716211965, now seen corresponding path program 1 times [2020-10-13 13:52:52,920 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:52:52,920 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [132266798] [2020-10-13 13:52:52,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:52:52,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:52:52,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:53,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:53,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:53,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:53,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:53,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:53,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:53,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:54,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:54,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:55,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:55,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:57,958 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:52:57,958 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 105 [2020-10-13 13:52:57,958 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-13 13:52:57,958 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 13:52:57,958 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:52:57,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 13:52:57,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 13:52:57,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-13 13:52:57,959 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:52:58,184 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-13 13:52:58,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:52:58,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:52:58,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:52:58,195 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:52:58,195 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:52:58,195 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:52:58,195 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 13:52:58,195 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:52:58,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 13:52:58,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:52:58,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 13:52:58,196 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:52:58,210 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-13 13:52:58,211 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [132266798] [2020-10-13 13:52:58,211 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 13:52:58,211 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 13:52:58,211 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465714324] [2020-10-13 13:52:58,212 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 13:52:58,212 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:52:58,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 13:52:58,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 13:52:58,213 INFO L87 Difference]: Start difference. First operand 72444 states and 110485 transitions. Second operand 5 states. [2020-10-13 13:53:09,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 13:53:09,413 INFO L93 Difference]: Finished difference Result 180143 states and 274274 transitions. [2020-10-13 13:53:09,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 13:53:09,413 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 99 [2020-10-13 13:53:09,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 13:53:09,564 INFO L225 Difference]: With dead ends: 180143 [2020-10-13 13:53:09,564 INFO L226 Difference]: Without dead ends: 107752 [2020-10-13 13:53:09,614 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 13:53:09,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107752 states. [2020-10-13 13:53:22,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107752 to 107750. [2020-10-13 13:53:22,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107750 states. [2020-10-13 13:53:22,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107750 states to 107750 states and 162385 transitions. [2020-10-13 13:53:22,944 INFO L78 Accepts]: Start accepts. Automaton has 107750 states and 162385 transitions. Word has length 99 [2020-10-13 13:53:22,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 13:53:22,945 INFO L479 AbstractCegarLoop]: Abstraction has 107750 states and 162385 transitions. [2020-10-13 13:53:22,945 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 13:53:22,945 INFO L276 IsEmpty]: Start isEmpty. Operand 107750 states and 162385 transitions. [2020-10-13 13:53:22,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-10-13 13:53:22,949 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 13:53:22,949 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 13:53:22,949 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-13 13:53:22,949 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 13:53:22,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 13:53:22,950 INFO L82 PathProgramCache]: Analyzing trace with hash -1196392842, now seen corresponding path program 1 times [2020-10-13 13:53:22,950 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 13:53:22,950 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1485310834] [2020-10-13 13:53:22,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 13:53:22,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:53:22,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:53:23,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:53:23,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:53:23,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:53:23,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:53:23,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:53:23,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:53:24,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:53:24,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:53:24,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:53:24,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:53:25,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:53:27,971 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:53:27,971 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-13 13:53:27,972 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-13 13:53:27,972 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 13:53:27,972 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:53:27,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 13:53:27,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 13:53:27,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-13 13:53:27,973 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:53:28,165 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-13 13:53:28,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 13:53:28,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 13:53:28,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 13:53:28,183 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 13:53:28,184 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 13:53:28,184 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 13:53:28,184 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-13 13:53:28,184 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 13:53:28,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 13:53:28,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 13:53:28,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 13:53:28,184 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 13:53:28,197 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-13 13:53:28,198 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1485310834] [2020-10-13 13:53:28,198 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 13:53:28,198 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 13:53:28,198 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22812231] [2020-10-13 13:53:28,198 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 13:53:28,198 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 13:53:28,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 13:53:28,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-13 13:53:28,199 INFO L87 Difference]: Start difference. First operand 107750 states and 162385 transitions. Second operand 6 states. [2020-10-13 13:53:28,402 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 163