/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.4 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-14 08:24:50,871 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-14 08:24:50,874 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-14 08:24:50,916 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-14 08:24:50,917 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-14 08:24:50,924 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-14 08:24:50,926 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-14 08:24:50,929 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-14 08:24:50,932 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-14 08:24:50,935 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-14 08:24:50,936 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-14 08:24:50,937 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-14 08:24:50,937 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-14 08:24:50,939 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-14 08:24:50,942 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-14 08:24:50,943 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-14 08:24:50,944 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-14 08:24:50,945 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-14 08:24:50,946 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-14 08:24:50,954 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-14 08:24:50,956 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-14 08:24:50,958 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-14 08:24:50,958 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-14 08:24:50,960 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-14 08:24:50,976 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-14 08:24:50,977 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-14 08:24:50,977 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-14 08:24:50,978 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-14 08:24:50,978 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-14 08:24:50,979 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-14 08:24:50,979 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-14 08:24:50,983 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-14 08:24:50,984 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-14 08:24:50,985 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-14 08:24:50,985 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-14 08:24:50,986 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-14 08:24:50,989 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-14 08:24:50,989 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-14 08:24:50,989 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-14 08:24:50,990 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-14 08:24:50,990 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-14 08:24:50,992 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-14 08:24:51,023 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-14 08:24:51,023 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-14 08:24:51,025 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-14 08:24:51,025 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-14 08:24:51,025 INFO L138 SettingsManager]: * Use SBE=true [2020-10-14 08:24:51,026 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-14 08:24:51,026 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-14 08:24:51,026 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-14 08:24:51,026 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-14 08:24:51,026 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-14 08:24:51,027 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-14 08:24:51,027 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-14 08:24:51,027 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-14 08:24:51,027 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-14 08:24:51,027 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-14 08:24:51,028 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-14 08:24:51,028 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-14 08:24:51,028 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-14 08:24:51,028 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-14 08:24:51,028 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-14 08:24:51,028 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-14 08:24:51,029 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 08:24:51,029 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-14 08:24:51,029 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-14 08:24:51,029 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-14 08:24:51,029 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-14 08:24:51,030 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-14 08:24:51,030 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-14 08:24:51,030 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-14 08:24:51,030 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4;log-additional-information=true;unknown-allowed=true; [2020-10-14 08:24:51,355 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-14 08:24:51,370 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-14 08:24:51,374 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-14 08:24:51,375 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-14 08:24:51,376 INFO L275 PluginConnector]: CDTParser initialized [2020-10-14 08:24:51,376 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-14 08:24:51,434 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4ec9c2644/aae3148a822c4c1aa3e83ae7ff1decff/FLAGcdd76a4af [2020-10-14 08:24:51,955 INFO L306 CDTParser]: Found 1 translation units. [2020-10-14 08:24:51,958 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_floodmax.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-14 08:24:51,980 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4ec9c2644/aae3148a822c4c1aa3e83ae7ff1decff/FLAGcdd76a4af [2020-10-14 08:24:52,265 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4ec9c2644/aae3148a822c4c1aa3e83ae7ff1decff [2020-10-14 08:24:52,273 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-14 08:24:52,275 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-14 08:24:52,276 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-14 08:24:52,276 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-14 08:24:52,280 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-14 08:24:52,281 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 08:24:52" (1/1) ... [2020-10-14 08:24:52,284 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@284e4e1b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:24:52, skipping insertion in model container [2020-10-14 08:24:52,284 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.10 08:24:52" (1/1) ... [2020-10-14 08:24:52,292 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-14 08:24:52,331 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-14 08:24:52,592 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 08:24:52,711 INFO L203 MainTranslator]: Completed pre-run [2020-10-14 08:24:52,808 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-14 08:24:52,828 INFO L208 MainTranslator]: Completed translation [2020-10-14 08:24:52,829 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:24:52 WrapperNode [2020-10-14 08:24:52,829 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-14 08:24:52,830 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-14 08:24:52,830 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-14 08:24:52,830 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-14 08:24:52,841 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:24:52" (1/1) ... [2020-10-14 08:24:52,841 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:24:52" (1/1) ... [2020-10-14 08:24:52,853 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:24:52" (1/1) ... [2020-10-14 08:24:52,853 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:24:52" (1/1) ... [2020-10-14 08:24:52,869 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:24:52" (1/1) ... [2020-10-14 08:24:52,881 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:24:52" (1/1) ... [2020-10-14 08:24:52,885 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:24:52" (1/1) ... [2020-10-14 08:24:52,890 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-14 08:24:52,891 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-14 08:24:52,891 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-14 08:24:52,891 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-14 08:24:52,892 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:24:52" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-14 08:24:52,969 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-14 08:24:52,969 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-14 08:24:52,969 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-14 08:24:52,969 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-14 08:24:52,969 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-14 08:24:52,970 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-14 08:24:52,970 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-14 08:24:52,970 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-14 08:24:52,970 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-14 08:24:52,970 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-14 08:24:52,970 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-14 08:24:52,970 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-14 08:24:52,971 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-14 08:24:52,971 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-14 08:24:52,971 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-14 08:24:52,971 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-14 08:24:52,971 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-14 08:24:52,971 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-14 08:24:52,971 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-14 08:24:52,972 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-14 08:24:52,972 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-14 08:24:53,725 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-14 08:24:53,725 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-14 08:24:53,731 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 08:24:53 BoogieIcfgContainer [2020-10-14 08:24:53,731 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-14 08:24:53,733 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-14 08:24:53,733 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-14 08:24:53,737 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-14 08:24:53,737 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.10 08:24:52" (1/3) ... [2020-10-14 08:24:53,738 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@653ac37e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 08:24:53, skipping insertion in model container [2020-10-14 08:24:53,738 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.10 08:24:52" (2/3) ... [2020-10-14 08:24:53,739 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@653ac37e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.10 08:24:53, skipping insertion in model container [2020-10-14 08:24:53,739 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.10 08:24:53" (3/3) ... [2020-10-14 08:24:53,741 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_floodmax.3.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-14 08:24:53,752 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-14 08:24:53,760 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-14 08:24:53,775 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-14 08:24:53,801 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-14 08:24:53,801 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-14 08:24:53,801 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-14 08:24:53,802 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-14 08:24:53,802 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-14 08:24:53,802 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-14 08:24:53,802 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-14 08:24:53,802 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-14 08:24:53,822 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states. [2020-10-14 08:24:53,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-14 08:24:53,834 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:24:53,835 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] [2020-10-14 08:24:53,835 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:24:53,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:24:53,842 INFO L82 PathProgramCache]: Analyzing trace with hash 1611542725, now seen corresponding path program 1 times [2020-10-14 08:24:53,851 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:24:53,852 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [300833839] [2020-10-14 08:24:53,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:24:54,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:24:54,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:24:54,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:24:54,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:24:55,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:24:56,376 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:24:56,377 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-14 08:24:56,378 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-14 08:24:56,378 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2189 [2020-10-14 08:24:56,381 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:24:56,381 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:24:56,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:24:56,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-14 08:24:56,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-14 08:24:56,382 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-14 08:24:56,680 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-14 08:24:56,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:24:56,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:24:56,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:24:56,704 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:24:56,704 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:24:56,704 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:24:56,704 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-14 08:24:56,705 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:24:56,705 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:24:56,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:24:56,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:24:56,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:24:56,706 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:24:56,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 08:24:56,729 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [300833839] [2020-10-14 08:24:56,730 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:24:56,731 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 08:24:56,732 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427006158] [2020-10-14 08:24:56,737 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 08:24:56,737 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:24:56,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 08:24:56,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:24:56,754 INFO L87 Difference]: Start difference. First operand 145 states. Second operand 4 states. [2020-10-14 08:24:57,039 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2020-10-14 08:24:57,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:24:57,919 INFO L93 Difference]: Finished difference Result 312 states and 523 transitions. [2020-10-14 08:24:57,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 08:24:57,924 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 60 [2020-10-14 08:24:57,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:24:57,955 INFO L225 Difference]: With dead ends: 312 [2020-10-14 08:24:57,955 INFO L226 Difference]: Without dead ends: 217 [2020-10-14 08:24:57,963 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 [2020-10-14 08:24:57,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2020-10-14 08:24:58,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 214. [2020-10-14 08:24:58,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 214 states. [2020-10-14 08:24:58,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 339 transitions. [2020-10-14 08:24:58,077 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 339 transitions. Word has length 60 [2020-10-14 08:24:58,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:24:58,078 INFO L479 AbstractCegarLoop]: Abstraction has 214 states and 339 transitions. [2020-10-14 08:24:58,078 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 08:24:58,078 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 339 transitions. [2020-10-14 08:24:58,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-14 08:24:58,089 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:24:58,089 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] [2020-10-14 08:24:58,090 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-14 08:24:58,090 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:24:58,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:24:58,091 INFO L82 PathProgramCache]: Analyzing trace with hash -536473390, now seen corresponding path program 1 times [2020-10-14 08:24:58,091 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:24:58,092 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [700396179] [2020-10-14 08:24:58,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:24:58,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:24:58,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:24:58,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:24:58,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:24:58,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:24:59,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:25:02,051 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:25:02,051 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-14 08:25:02,051 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-14 08:25:02,052 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3915 [2020-10-14 08:25:02,054 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:25:02,054 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:25:02,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:25:02,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-14 08:25:02,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-14 08:25:02,055 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:25:02,293 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-14 08:25:02,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:25:02,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:25:02,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:25:02,307 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:25:02,308 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:25:02,308 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:25:02,308 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-14 08:25:02,308 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:25:02,309 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:25:02,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:25:02,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:25:02,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:25:02,310 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:25:02,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 08:25:02,325 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [700396179] [2020-10-14 08:25:02,325 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:25:02,325 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 08:25:02,326 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807228800] [2020-10-14 08:25:02,328 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 08:25:02,328 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:25:02,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 08:25:02,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:25:02,329 INFO L87 Difference]: Start difference. First operand 214 states and 339 transitions. Second operand 4 states. [2020-10-14 08:25:02,578 WARN L193 SmtUtils]: Spent 221.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2020-10-14 08:25:03,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:25:03,347 INFO L93 Difference]: Finished difference Result 512 states and 839 transitions. [2020-10-14 08:25:03,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 08:25:03,348 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 62 [2020-10-14 08:25:03,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:25:03,351 INFO L225 Difference]: With dead ends: 512 [2020-10-14 08:25:03,352 INFO L226 Difference]: Without dead ends: 356 [2020-10-14 08:25:03,354 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 [2020-10-14 08:25:03,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2020-10-14 08:25:03,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 352. [2020-10-14 08:25:03,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 352 states. [2020-10-14 08:25:03,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 569 transitions. [2020-10-14 08:25:03,384 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 569 transitions. Word has length 62 [2020-10-14 08:25:03,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:25:03,385 INFO L479 AbstractCegarLoop]: Abstraction has 352 states and 569 transitions. [2020-10-14 08:25:03,385 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 08:25:03,385 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 569 transitions. [2020-10-14 08:25:03,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-14 08:25:03,387 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:25:03,387 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] [2020-10-14 08:25:03,387 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-14 08:25:03,387 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:25:03,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:25:03,388 INFO L82 PathProgramCache]: Analyzing trace with hash -1824743771, now seen corresponding path program 1 times [2020-10-14 08:25:03,388 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:25:03,388 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1467262327] [2020-10-14 08:25:03,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:25:03,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:25:03,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:25:03,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:25:03,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:25:03,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:25:04,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:25:04,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:25:08,417 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:25:08,418 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-14 08:25:08,419 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 08:25:08,419 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-14 08:25:08,420 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:25:08,420 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:25:08,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:25:08,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 30 [2020-10-14 08:25:08,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-14 08:25:08,422 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:25:08,683 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-14 08:25:08,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:25:08,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:25:08,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:25:08,703 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:25:08,703 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:25:08,704 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:25:08,704 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-14 08:25:08,704 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:25:08,704 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:25:08,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:25:08,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:25:08,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:25:08,705 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:25:08,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 08:25:08,720 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1467262327] [2020-10-14 08:25:08,721 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:25:08,721 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 08:25:08,721 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363732856] [2020-10-14 08:25:08,722 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 08:25:08,723 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:25:08,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 08:25:08,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:25:08,724 INFO L87 Difference]: Start difference. First operand 352 states and 569 transitions. Second operand 4 states. [2020-10-14 08:25:08,927 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2020-10-14 08:25:09,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:25:09,530 INFO L93 Difference]: Finished difference Result 904 states and 1487 transitions. [2020-10-14 08:25:09,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 08:25:09,531 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 64 [2020-10-14 08:25:09,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:25:09,535 INFO L225 Difference]: With dead ends: 904 [2020-10-14 08:25:09,535 INFO L226 Difference]: Without dead ends: 610 [2020-10-14 08:25:09,537 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 [2020-10-14 08:25:09,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2020-10-14 08:25:09,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 604. [2020-10-14 08:25:09,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 604 states. [2020-10-14 08:25:09,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 604 states to 604 states and 965 transitions. [2020-10-14 08:25:09,567 INFO L78 Accepts]: Start accepts. Automaton has 604 states and 965 transitions. Word has length 64 [2020-10-14 08:25:09,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:25:09,568 INFO L479 AbstractCegarLoop]: Abstraction has 604 states and 965 transitions. [2020-10-14 08:25:09,568 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 08:25:09,569 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states and 965 transitions. [2020-10-14 08:25:09,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-14 08:25:09,570 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:25:09,570 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] [2020-10-14 08:25:09,570 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-14 08:25:09,571 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:25:09,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:25:09,571 INFO L82 PathProgramCache]: Analyzing trace with hash -82593166, now seen corresponding path program 1 times [2020-10-14 08:25:09,571 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:25:09,571 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [683572817] [2020-10-14 08:25:09,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:25:09,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:25:09,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:25:09,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:25:09,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:25:09,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:25:09,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:25:12,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:25:12,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:25:14,609 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:25:14,609 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-14 08:25:14,610 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 08:25:14,610 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-14 08:25:14,610 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:25:14,611 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:25:14,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 08:25:14,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 08:25:14,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-14 08:25:14,612 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:25:14,883 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-14 08:25:14,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:25:14,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:25:14,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:25:14,902 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:25:14,902 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:25:14,902 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:25:14,902 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-14 08:25:14,903 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:25:14,903 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:25:14,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:25:14,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:25:14,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:25:14,904 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:25:14,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 08:25:14,928 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [683572817] [2020-10-14 08:25:14,928 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:25:14,929 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 08:25:14,929 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967799383] [2020-10-14 08:25:14,929 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 08:25:14,929 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:25:14,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 08:25:14,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 08:25:14,930 INFO L87 Difference]: Start difference. First operand 604 states and 965 transitions. Second operand 5 states. [2020-10-14 08:25:16,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:25:16,048 INFO L93 Difference]: Finished difference Result 1708 states and 2749 transitions. [2020-10-14 08:25:16,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 08:25:16,048 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 66 [2020-10-14 08:25:16,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:25:16,062 INFO L225 Difference]: With dead ends: 1708 [2020-10-14 08:25:16,062 INFO L226 Difference]: Without dead ends: 1162 [2020-10-14 08:25:16,064 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 [2020-10-14 08:25:16,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1162 states. [2020-10-14 08:25:16,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1162 to 1160. [2020-10-14 08:25:16,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1160 states. [2020-10-14 08:25:16,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1160 states to 1160 states and 1847 transitions. [2020-10-14 08:25:16,148 INFO L78 Accepts]: Start accepts. Automaton has 1160 states and 1847 transitions. Word has length 66 [2020-10-14 08:25:16,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:25:16,149 INFO L479 AbstractCegarLoop]: Abstraction has 1160 states and 1847 transitions. [2020-10-14 08:25:16,149 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 08:25:16,149 INFO L276 IsEmpty]: Start isEmpty. Operand 1160 states and 1847 transitions. [2020-10-14 08:25:16,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-14 08:25:16,151 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:25:16,151 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] [2020-10-14 08:25:16,152 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-14 08:25:16,152 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:25:16,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:25:16,152 INFO L82 PathProgramCache]: Analyzing trace with hash 1006683073, now seen corresponding path program 1 times [2020-10-14 08:25:16,153 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:25:16,153 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [165785021] [2020-10-14 08:25:16,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:25:16,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:25:16,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:25:16,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:25:16,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:25:16,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:25:16,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:25:16,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:25:16,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:25:19,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:25:21,178 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:25:21,179 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-14 08:25:21,179 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-14 08:25:21,179 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-14 08:25:21,180 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:25:21,180 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:25:21,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:25:21,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 08:25:21,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-14 08:25:21,181 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:25:21,368 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-14 08:25:21,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:25:21,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:25:21,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:25:21,387 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:25:21,387 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:25:21,388 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:25:21,388 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-14 08:25:21,388 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:25:21,389 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:25:21,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:25:21,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:25:21,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:25:21,390 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:25:21,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 08:25:21,406 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [165785021] [2020-10-14 08:25:21,406 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:25:21,406 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 08:25:21,407 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587020863] [2020-10-14 08:25:21,407 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 08:25:21,408 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:25:21,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 08:25:21,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:25:21,408 INFO L87 Difference]: Start difference. First operand 1160 states and 1847 transitions. Second operand 4 states. [2020-10-14 08:25:22,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:25:22,500 INFO L93 Difference]: Finished difference Result 3390 states and 5391 transitions. [2020-10-14 08:25:22,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 08:25:22,501 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 67 [2020-10-14 08:25:22,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:25:22,543 INFO L225 Difference]: With dead ends: 3390 [2020-10-14 08:25:22,543 INFO L226 Difference]: Without dead ends: 2278 [2020-10-14 08:25:22,546 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 [2020-10-14 08:25:22,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2278 states. [2020-10-14 08:25:22,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2278 to 1166. [2020-10-14 08:25:22,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1166 states. [2020-10-14 08:25:22,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1166 states to 1166 states and 1855 transitions. [2020-10-14 08:25:22,646 INFO L78 Accepts]: Start accepts. Automaton has 1166 states and 1855 transitions. Word has length 67 [2020-10-14 08:25:22,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:25:22,647 INFO L479 AbstractCegarLoop]: Abstraction has 1166 states and 1855 transitions. [2020-10-14 08:25:22,647 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 08:25:22,647 INFO L276 IsEmpty]: Start isEmpty. Operand 1166 states and 1855 transitions. [2020-10-14 08:25:22,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-14 08:25:22,649 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:25:22,649 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] [2020-10-14 08:25:22,649 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-14 08:25:22,650 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:25:22,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:25:22,650 INFO L82 PathProgramCache]: Analyzing trace with hash 43240883, now seen corresponding path program 1 times [2020-10-14 08:25:22,650 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:25:22,650 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1436039686] [2020-10-14 08:25:22,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:25:22,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:25:22,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:25:22,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:25:22,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:25:22,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:25:22,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:25:23,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:25:23,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:25:27,678 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:25:27,678 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-14 08:25:27,679 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 08:25:27,679 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-14 08:25:27,679 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:25:27,679 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:25:27,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 08:25:27,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 08:25:27,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-14 08:25:27,679 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:25:27,945 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-14 08:25:27,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:25:27,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:25:27,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:25:27,967 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:25:27,968 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:25:27,968 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:25:27,968 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-14 08:25:27,969 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:25:27,969 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:25:27,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:25:27,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:25:27,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:25:27,970 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:25:27,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 08:25:28,000 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1436039686] [2020-10-14 08:25:28,000 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:25:28,000 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 08:25:28,001 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677259440] [2020-10-14 08:25:28,001 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 08:25:28,001 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:25:28,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 08:25:28,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 08:25:28,002 INFO L87 Difference]: Start difference. First operand 1166 states and 1855 transitions. Second operand 5 states. [2020-10-14 08:25:29,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:25:29,118 INFO L93 Difference]: Finished difference Result 3378 states and 5375 transitions. [2020-10-14 08:25:29,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 08:25:29,119 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 68 [2020-10-14 08:25:29,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:25:29,134 INFO L225 Difference]: With dead ends: 3378 [2020-10-14 08:25:29,134 INFO L226 Difference]: Without dead ends: 2237 [2020-10-14 08:25:29,137 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 [2020-10-14 08:25:29,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2237 states. [2020-10-14 08:25:29,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2237 to 2235. [2020-10-14 08:25:29,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2235 states. [2020-10-14 08:25:29,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2235 states to 2235 states and 3531 transitions. [2020-10-14 08:25:29,358 INFO L78 Accepts]: Start accepts. Automaton has 2235 states and 3531 transitions. Word has length 68 [2020-10-14 08:25:29,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:25:29,359 INFO L479 AbstractCegarLoop]: Abstraction has 2235 states and 3531 transitions. [2020-10-14 08:25:29,359 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 08:25:29,360 INFO L276 IsEmpty]: Start isEmpty. Operand 2235 states and 3531 transitions. [2020-10-14 08:25:29,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-14 08:25:29,362 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:25:29,362 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] [2020-10-14 08:25:29,363 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-14 08:25:29,363 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:25:29,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:25:29,363 INFO L82 PathProgramCache]: Analyzing trace with hash -700964608, now seen corresponding path program 1 times [2020-10-14 08:25:29,363 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:25:29,364 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1770930646] [2020-10-14 08:25:29,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:25:29,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:25:29,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:25:29,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:25:29,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:25:29,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:25:29,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:25:29,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:25:31,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:25:34,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:25:34,391 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:25:34,392 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-14 08:25:34,392 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-14 08:25:34,392 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-14 08:25:34,392 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:25:34,393 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:25:34,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:25:34,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-14 08:25:34,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-14 08:25:34,393 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:25:34,571 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-14 08:25:34,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:25:34,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:25:34,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:25:34,587 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:25:34,588 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:25:34,588 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:25:34,588 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-14 08:25:34,588 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:25:34,589 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:25:34,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:25:34,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:25:34,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:25:34,589 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:25:34,599 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 08:25:34,600 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1770930646] [2020-10-14 08:25:34,601 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:25:34,601 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 08:25:34,601 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998237799] [2020-10-14 08:25:34,601 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 08:25:34,602 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:25:34,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 08:25:34,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:25:34,602 INFO L87 Difference]: Start difference. First operand 2235 states and 3531 transitions. Second operand 4 states. [2020-10-14 08:25:35,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:25:35,628 INFO L93 Difference]: Finished difference Result 6550 states and 10383 transitions. [2020-10-14 08:25:35,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 08:25:35,630 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 69 [2020-10-14 08:25:35,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:25:35,662 INFO L225 Difference]: With dead ends: 6550 [2020-10-14 08:25:35,662 INFO L226 Difference]: Without dead ends: 4437 [2020-10-14 08:25:35,676 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 [2020-10-14 08:25:35,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4437 states. [2020-10-14 08:25:35,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4437 to 2241. [2020-10-14 08:25:35,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2241 states. [2020-10-14 08:25:36,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2241 states to 2241 states and 3539 transitions. [2020-10-14 08:25:36,011 INFO L78 Accepts]: Start accepts. Automaton has 2241 states and 3539 transitions. Word has length 69 [2020-10-14 08:25:36,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:25:36,011 INFO L479 AbstractCegarLoop]: Abstraction has 2241 states and 3539 transitions. [2020-10-14 08:25:36,012 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 08:25:36,012 INFO L276 IsEmpty]: Start isEmpty. Operand 2241 states and 3539 transitions. [2020-10-14 08:25:36,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-14 08:25:36,025 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:25:36,025 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] [2020-10-14 08:25:36,026 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-14 08:25:36,026 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:25:36,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:25:36,026 INFO L82 PathProgramCache]: Analyzing trace with hash 1224513272, now seen corresponding path program 1 times [2020-10-14 08:25:36,027 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:25:36,027 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1784509739] [2020-10-14 08:25:36,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:25:36,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:25:36,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:25:36,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:25:36,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:25:36,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:25:36,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:25:37,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:25:37,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:25:38,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:25:41,067 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:25:41,067 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-14 08:25:41,067 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-14 08:25:41,067 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-14 08:25:41,067 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:25:41,068 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:25:41,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:25:41,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-14 08:25:41,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-14 08:25:41,068 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:25:41,246 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-14 08:25:41,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:25:41,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:25:41,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:25:41,259 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:25:41,260 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:25:41,260 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:25:41,260 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-14 08:25:41,260 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:25:41,260 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:25:41,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:25:41,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:25:41,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:25:41,261 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:25:41,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 08:25:41,277 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1784509739] [2020-10-14 08:25:41,277 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:25:41,277 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 08:25:41,277 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164223799] [2020-10-14 08:25:41,278 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 08:25:41,278 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:25:41,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 08:25:41,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:25:41,279 INFO L87 Difference]: Start difference. First operand 2241 states and 3539 transitions. Second operand 4 states. [2020-10-14 08:25:42,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:25:42,475 INFO L93 Difference]: Finished difference Result 6244 states and 9969 transitions. [2020-10-14 08:25:42,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 08:25:42,475 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 70 [2020-10-14 08:25:42,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:25:42,496 INFO L225 Difference]: With dead ends: 6244 [2020-10-14 08:25:42,497 INFO L226 Difference]: Without dead ends: 4210 [2020-10-14 08:25:42,502 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 [2020-10-14 08:25:42,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4210 states. [2020-10-14 08:25:42,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4210 to 4208. [2020-10-14 08:25:42,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4208 states. [2020-10-14 08:25:42,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4208 states to 4208 states and 6639 transitions. [2020-10-14 08:25:42,857 INFO L78 Accepts]: Start accepts. Automaton has 4208 states and 6639 transitions. Word has length 70 [2020-10-14 08:25:42,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:25:42,857 INFO L479 AbstractCegarLoop]: Abstraction has 4208 states and 6639 transitions. [2020-10-14 08:25:42,858 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 08:25:42,858 INFO L276 IsEmpty]: Start isEmpty. Operand 4208 states and 6639 transitions. [2020-10-14 08:25:42,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-14 08:25:42,862 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:25:42,862 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] [2020-10-14 08:25:42,862 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-14 08:25:42,863 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:25:42,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:25:42,863 INFO L82 PathProgramCache]: Analyzing trace with hash 1285525397, now seen corresponding path program 1 times [2020-10-14 08:25:42,864 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:25:42,864 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1325243840] [2020-10-14 08:25:42,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:25:42,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:25:42,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:25:42,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:25:42,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:25:42,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:25:43,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:25:43,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:25:43,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:25:44,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:25:44,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:25:47,892 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:25:47,892 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-14 08:25:47,892 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-14 08:25:47,892 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-14 08:25:47,892 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:25:47,893 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:25:47,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 08:25:47,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 08:25:47,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-14 08:25:47,893 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:25:48,113 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-14 08:25:48,114 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:25:48,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:25:48,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:25:48,127 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:25:48,128 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:25:48,128 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:25:48,128 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-14 08:25:48,128 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:25:48,129 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:25:48,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:25:48,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:25:48,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:25:48,129 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-14 08:25:48,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 08:25:48,150 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1325243840] [2020-10-14 08:25:48,151 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:25:48,151 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 08:25:48,151 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [634937319] [2020-10-14 08:25:48,152 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 08:25:48,152 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:25:48,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 08:25:48,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 08:25:48,152 INFO L87 Difference]: Start difference. First operand 4208 states and 6639 transitions. Second operand 5 states. [2020-10-14 08:25:49,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:25:49,391 INFO L93 Difference]: Finished difference Result 12025 states and 19065 transitions. [2020-10-14 08:25:49,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 08:25:49,392 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 70 [2020-10-14 08:25:49,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:25:49,432 INFO L225 Difference]: With dead ends: 12025 [2020-10-14 08:25:49,432 INFO L226 Difference]: Without dead ends: 8004 [2020-10-14 08:25:49,442 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 [2020-10-14 08:25:49,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8004 states. [2020-10-14 08:25:50,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8004 to 8002. [2020-10-14 08:25:50,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8002 states. [2020-10-14 08:25:50,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8002 states to 8002 states and 12568 transitions. [2020-10-14 08:25:50,225 INFO L78 Accepts]: Start accepts. Automaton has 8002 states and 12568 transitions. Word has length 70 [2020-10-14 08:25:50,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:25:50,225 INFO L479 AbstractCegarLoop]: Abstraction has 8002 states and 12568 transitions. [2020-10-14 08:25:50,225 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 08:25:50,225 INFO L276 IsEmpty]: Start isEmpty. Operand 8002 states and 12568 transitions. [2020-10-14 08:25:50,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-14 08:25:50,231 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:25:50,231 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] [2020-10-14 08:25:50,231 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-14 08:25:50,231 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:25:50,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:25:50,232 INFO L82 PathProgramCache]: Analyzing trace with hash -1739945303, now seen corresponding path program 1 times [2020-10-14 08:25:50,232 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:25:50,232 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2028139207] [2020-10-14 08:25:50,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:25:50,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:25:50,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:25:50,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:25:50,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:25:50,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:25:50,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:25:50,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:25:52,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:25:55,258 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:25:55,259 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-14 08:25:55,259 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 08:25:55,259 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-14 08:25:55,259 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:25:55,259 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:25:55,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:25:55,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 51 [2020-10-14 08:25:55,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-14 08:25:55,260 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:25:55,422 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-14 08:25:55,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:25:55,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:25:55,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:25:55,434 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:25:55,434 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:25:55,434 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:25:55,434 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 08:25:55,434 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:25:55,435 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:25:55,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:25:55,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:25:55,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:25:55,435 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:25:55,446 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 08:25:55,447 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2028139207] [2020-10-14 08:25:55,447 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:25:55,447 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 08:25:55,447 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436981090] [2020-10-14 08:25:55,448 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 08:25:55,448 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:25:55,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 08:25:55,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:25:55,449 INFO L87 Difference]: Start difference. First operand 8002 states and 12568 transitions. Second operand 4 states. [2020-10-14 08:25:55,627 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2020-10-14 08:25:56,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:25:56,871 INFO L93 Difference]: Finished difference Result 15248 states and 24240 transitions. [2020-10-14 08:25:56,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 08:25:56,872 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 70 [2020-10-14 08:25:56,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:25:56,901 INFO L225 Difference]: With dead ends: 15248 [2020-10-14 08:25:56,901 INFO L226 Difference]: Without dead ends: 11204 [2020-10-14 08:25:56,913 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 [2020-10-14 08:25:56,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11204 states. [2020-10-14 08:25:57,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11204 to 11202. [2020-10-14 08:25:57,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11202 states. [2020-10-14 08:25:57,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11202 states to 11202 states and 17642 transitions. [2020-10-14 08:25:57,837 INFO L78 Accepts]: Start accepts. Automaton has 11202 states and 17642 transitions. Word has length 70 [2020-10-14 08:25:57,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:25:57,837 INFO L479 AbstractCegarLoop]: Abstraction has 11202 states and 17642 transitions. [2020-10-14 08:25:57,838 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 08:25:57,838 INFO L276 IsEmpty]: Start isEmpty. Operand 11202 states and 17642 transitions. [2020-10-14 08:25:57,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-14 08:25:57,842 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:25:57,842 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] [2020-10-14 08:25:57,842 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-14 08:25:57,843 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:25:57,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:25:57,843 INFO L82 PathProgramCache]: Analyzing trace with hash -1315458060, now seen corresponding path program 1 times [2020-10-14 08:25:57,843 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:25:57,843 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [753818903] [2020-10-14 08:25:57,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:25:57,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:25:57,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:25:57,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:25:57,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:25:57,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:25:57,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:25:57,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:25:58,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:26:02,865 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:26:02,865 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-14 08:26:02,866 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 08:26:02,866 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-14 08:26:02,866 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:26:02,866 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:26:02,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 08:26:02,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-14 08:26:02,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-14 08:26:02,867 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:26:03,077 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-14 08:26:03,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:26:03,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:26:03,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:26:03,088 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:26:03,089 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:26:03,089 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:26:03,089 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 08:26:03,089 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:26:03,090 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:26:03,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:26:03,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:26:03,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:26:03,090 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:26:03,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 08:26:03,109 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [753818903] [2020-10-14 08:26:03,109 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:26:03,110 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 08:26:03,110 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528673114] [2020-10-14 08:26:03,110 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 08:26:03,110 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:26:03,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 08:26:03,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 08:26:03,111 INFO L87 Difference]: Start difference. First operand 11202 states and 17642 transitions. Second operand 5 states. [2020-10-14 08:26:04,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:26:04,745 INFO L93 Difference]: Finished difference Result 24120 states and 37979 transitions. [2020-10-14 08:26:04,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 08:26:04,746 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 70 [2020-10-14 08:26:04,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:26:04,779 INFO L225 Difference]: With dead ends: 24120 [2020-10-14 08:26:04,780 INFO L226 Difference]: Without dead ends: 12931 [2020-10-14 08:26:04,806 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 [2020-10-14 08:26:04,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12931 states. [2020-10-14 08:26:05,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12931 to 11527. [2020-10-14 08:26:05,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11527 states. [2020-10-14 08:26:05,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11527 states to 11527 states and 18048 transitions. [2020-10-14 08:26:05,746 INFO L78 Accepts]: Start accepts. Automaton has 11527 states and 18048 transitions. Word has length 70 [2020-10-14 08:26:05,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:26:05,746 INFO L479 AbstractCegarLoop]: Abstraction has 11527 states and 18048 transitions. [2020-10-14 08:26:05,746 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 08:26:05,746 INFO L276 IsEmpty]: Start isEmpty. Operand 11527 states and 18048 transitions. [2020-10-14 08:26:05,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-14 08:26:05,751 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:26:05,751 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] [2020-10-14 08:26:05,751 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-14 08:26:05,751 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:26:05,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:26:05,752 INFO L82 PathProgramCache]: Analyzing trace with hash 95044415, now seen corresponding path program 1 times [2020-10-14 08:26:05,752 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:26:05,752 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [263757819] [2020-10-14 08:26:05,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:26:05,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:26:05,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:26:05,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:26:05,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:26:05,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:26:05,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:26:06,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:26:08,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:26:10,772 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:26:10,772 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-14 08:26:10,772 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 08:26:10,772 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-14 08:26:10,773 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:26:10,773 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:26:10,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:26:10,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-14 08:26:10,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-14 08:26:10,773 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:26:10,940 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-14 08:26:10,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:26:10,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:26:10,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:26:10,950 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:26:10,950 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:26:10,951 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:26:10,951 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 08:26:10,951 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:26:10,951 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:26:10,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:26:10,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:26:10,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:26:10,951 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:26:10,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 08:26:10,959 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [263757819] [2020-10-14 08:26:10,959 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:26:10,959 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 08:26:10,959 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241993284] [2020-10-14 08:26:10,960 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 08:26:10,960 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:26:10,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 08:26:10,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:26:10,960 INFO L87 Difference]: Start difference. First operand 11527 states and 18048 transitions. Second operand 4 states. [2020-10-14 08:26:13,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:26:13,180 INFO L93 Difference]: Finished difference Result 34130 states and 53556 transitions. [2020-10-14 08:26:13,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-14 08:26:13,180 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 71 [2020-10-14 08:26:13,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:26:13,243 INFO L225 Difference]: With dead ends: 34130 [2020-10-14 08:26:13,243 INFO L226 Difference]: Without dead ends: 22998 [2020-10-14 08:26:13,266 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 [2020-10-14 08:26:13,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22998 states. [2020-10-14 08:26:14,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22998 to 11530. [2020-10-14 08:26:14,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11530 states. [2020-10-14 08:26:14,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11530 states to 11530 states and 18052 transitions. [2020-10-14 08:26:14,073 INFO L78 Accepts]: Start accepts. Automaton has 11530 states and 18052 transitions. Word has length 71 [2020-10-14 08:26:14,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:26:14,074 INFO L479 AbstractCegarLoop]: Abstraction has 11530 states and 18052 transitions. [2020-10-14 08:26:14,074 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 08:26:14,074 INFO L276 IsEmpty]: Start isEmpty. Operand 11530 states and 18052 transitions. [2020-10-14 08:26:14,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-14 08:26:14,079 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:26:14,079 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] [2020-10-14 08:26:14,079 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-14 08:26:14,079 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:26:14,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:26:14,079 INFO L82 PathProgramCache]: Analyzing trace with hash -1863697099, now seen corresponding path program 1 times [2020-10-14 08:26:14,080 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:26:14,080 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2076989654] [2020-10-14 08:26:14,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:26:14,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:26:14,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:26:14,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:26:14,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:26:14,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:26:14,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:26:14,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:26:14,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:26:19,101 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:26:19,101 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-14 08:26:19,101 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 08:26:19,101 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-14 08:26:19,101 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:26:19,102 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:26:19,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 08:26:19,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 48 [2020-10-14 08:26:19,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-14 08:26:19,102 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:26:19,298 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-14 08:26:19,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:26:19,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:26:19,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:26:19,309 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:26:19,309 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:26:19,309 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:26:19,310 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 08:26:19,310 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:26:19,310 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:26:19,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:26:19,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:26:19,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:26:19,310 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:26:19,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 08:26:19,319 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2076989654] [2020-10-14 08:26:19,319 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:26:19,319 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-14 08:26:19,320 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930274092] [2020-10-14 08:26:19,320 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 08:26:19,320 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:26:19,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 08:26:19,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 08:26:19,320 INFO L87 Difference]: Start difference. First operand 11530 states and 18052 transitions. Second operand 6 states. [2020-10-14 08:26:19,537 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification that was a NOOP. DAG size: 160 [2020-10-14 08:26:22,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:26:22,908 INFO L93 Difference]: Finished difference Result 52606 states and 84594 transitions. [2020-10-14 08:26:22,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-14 08:26:22,909 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 72 [2020-10-14 08:26:22,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:26:23,011 INFO L225 Difference]: With dead ends: 52606 [2020-10-14 08:26:23,011 INFO L226 Difference]: Without dead ends: 42092 [2020-10-14 08:26:23,043 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-10-14 08:26:23,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42092 states. [2020-10-14 08:26:24,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42092 to 21002. [2020-10-14 08:26:24,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21002 states. [2020-10-14 08:26:24,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21002 states to 21002 states and 33044 transitions. [2020-10-14 08:26:24,867 INFO L78 Accepts]: Start accepts. Automaton has 21002 states and 33044 transitions. Word has length 72 [2020-10-14 08:26:24,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:26:24,867 INFO L479 AbstractCegarLoop]: Abstraction has 21002 states and 33044 transitions. [2020-10-14 08:26:24,868 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-14 08:26:24,868 INFO L276 IsEmpty]: Start isEmpty. Operand 21002 states and 33044 transitions. [2020-10-14 08:26:24,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-14 08:26:24,874 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:26:24,874 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 08:26:24,874 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-14 08:26:24,875 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:26:24,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:26:24,875 INFO L82 PathProgramCache]: Analyzing trace with hash -2001645673, now seen corresponding path program 1 times [2020-10-14 08:26:24,875 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:26:24,875 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [636872882] [2020-10-14 08:26:24,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:26:24,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:26:24,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:26:24,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:26:24,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:26:25,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:26:25,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:26:25,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:26:25,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:26:29,904 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:26:29,905 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-14 08:26:29,905 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 08:26:29,905 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-14 08:26:29,905 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:26:29,905 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:26:29,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 08:26:29,905 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 48 [2020-10-14 08:26:29,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-14 08:26:29,906 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:26:30,085 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-14 08:26:30,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:26:30,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:26:30,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:26:30,098 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:26:30,098 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:26:30,098 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:26:30,099 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-14 08:26:30,099 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:26:30,099 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:26:30,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:26:30,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:26:30,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:26:30,100 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:26:30,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 08:26:30,112 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [636872882] [2020-10-14 08:26:30,112 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:26:30,113 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 08:26:30,113 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141176952] [2020-10-14 08:26:30,113 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 08:26:30,114 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:26:30,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 08:26:30,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 08:26:30,114 INFO L87 Difference]: Start difference. First operand 21002 states and 33044 transitions. Second operand 5 states. [2020-10-14 08:26:30,345 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2020-10-14 08:26:34,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:26:34,130 INFO L93 Difference]: Finished difference Result 62032 states and 99303 transitions. [2020-10-14 08:26:34,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 08:26:34,131 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 73 [2020-10-14 08:26:34,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:26:34,185 INFO L225 Difference]: With dead ends: 62032 [2020-10-14 08:26:34,185 INFO L226 Difference]: Without dead ends: 42078 [2020-10-14 08:26:34,218 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 [2020-10-14 08:26:34,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42078 states. [2020-10-14 08:26:36,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42078 to 31378. [2020-10-14 08:26:36,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31378 states. [2020-10-14 08:26:36,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31378 states to 31378 states and 49628 transitions. [2020-10-14 08:26:36,784 INFO L78 Accepts]: Start accepts. Automaton has 31378 states and 49628 transitions. Word has length 73 [2020-10-14 08:26:36,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:26:36,784 INFO L479 AbstractCegarLoop]: Abstraction has 31378 states and 49628 transitions. [2020-10-14 08:26:36,784 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 08:26:36,784 INFO L276 IsEmpty]: Start isEmpty. Operand 31378 states and 49628 transitions. [2020-10-14 08:26:36,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-14 08:26:36,792 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:26:36,792 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 08:26:36,792 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-14 08:26:36,793 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:26:36,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:26:36,793 INFO L82 PathProgramCache]: Analyzing trace with hash 1722607378, now seen corresponding path program 1 times [2020-10-14 08:26:36,793 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:26:36,793 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [331804504] [2020-10-14 08:26:36,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:26:36,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:26:36,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:26:36,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:26:36,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:26:36,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:26:36,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:26:38,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:26:41,814 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:26:41,814 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-14 08:26:41,814 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-14 08:26:41,814 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-14 08:26:41,815 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:26:41,815 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:26:41,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:26:41,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 54 [2020-10-14 08:26:41,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-14 08:26:41,815 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:26:41,984 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-14 08:26:41,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:26:41,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:26:41,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:26:41,994 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:26:41,995 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:26:41,995 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:26:41,995 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 08:26:41,995 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:26:41,995 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:26:41,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:26:41,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:26:41,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:26:41,995 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:26:42,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 08:26:42,004 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [331804504] [2020-10-14 08:26:42,004 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:26:42,004 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 08:26:42,004 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813386108] [2020-10-14 08:26:42,004 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 08:26:42,004 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:26:42,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 08:26:42,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:26:42,005 INFO L87 Difference]: Start difference. First operand 31378 states and 49628 transitions. Second operand 4 states. [2020-10-14 08:26:42,196 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2020-10-14 08:26:46,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:26:46,217 INFO L93 Difference]: Finished difference Result 60726 states and 96750 transitions. [2020-10-14 08:26:46,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 08:26:46,218 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 73 [2020-10-14 08:26:46,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:26:46,271 INFO L225 Difference]: With dead ends: 60726 [2020-10-14 08:26:46,271 INFO L226 Difference]: Without dead ends: 43716 [2020-10-14 08:26:46,288 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 [2020-10-14 08:26:46,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43716 states. [2020-10-14 08:26:50,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43716 to 43714. [2020-10-14 08:26:50,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43714 states. [2020-10-14 08:26:50,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43714 states to 43714 states and 69116 transitions. [2020-10-14 08:26:50,559 INFO L78 Accepts]: Start accepts. Automaton has 43714 states and 69116 transitions. Word has length 73 [2020-10-14 08:26:50,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:26:50,559 INFO L479 AbstractCegarLoop]: Abstraction has 43714 states and 69116 transitions. [2020-10-14 08:26:50,559 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 08:26:50,559 INFO L276 IsEmpty]: Start isEmpty. Operand 43714 states and 69116 transitions. [2020-10-14 08:26:50,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-14 08:26:50,564 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:26:50,564 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 08:26:50,564 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-14 08:26:50,564 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:26:50,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:26:50,565 INFO L82 PathProgramCache]: Analyzing trace with hash 1614212952, now seen corresponding path program 1 times [2020-10-14 08:26:50,565 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:26:50,565 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2121424038] [2020-10-14 08:26:50,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:26:50,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:26:50,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:26:50,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:26:50,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:26:50,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:26:50,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:26:50,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:26:51,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:26:55,589 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:26:55,589 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-14 08:26:55,589 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 08:26:55,589 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-14 08:26:55,589 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:26:55,590 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:26:55,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-14 08:26:55,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 52 [2020-10-14 08:26:55,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-14 08:26:55,590 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:26:55,766 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-14 08:26:55,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:26:55,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:26:55,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:26:55,776 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:26:55,776 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:26:55,776 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:26:55,777 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 08:26:55,777 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:26:55,777 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:26:55,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:26:55,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:26:55,777 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:26:55,777 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:26:55,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 08:26:55,786 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2121424038] [2020-10-14 08:26:55,786 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:26:55,786 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-14 08:26:55,786 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857266129] [2020-10-14 08:26:55,787 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-14 08:26:55,787 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:26:55,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-14 08:26:55,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-14 08:26:55,787 INFO L87 Difference]: Start difference. First operand 43714 states and 69116 transitions. Second operand 4 states. [2020-10-14 08:26:55,985 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2020-10-14 08:27:01,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:27:01,229 INFO L93 Difference]: Finished difference Result 94254 states and 151790 transitions. [2020-10-14 08:27:01,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-14 08:27:01,230 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 73 [2020-10-14 08:27:01,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:27:01,320 INFO L225 Difference]: With dead ends: 94254 [2020-10-14 08:27:01,320 INFO L226 Difference]: Without dead ends: 63292 [2020-10-14 08:27:01,357 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 [2020-10-14 08:27:01,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63292 states. [2020-10-14 08:27:07,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63292 to 63290. [2020-10-14 08:27:07,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63290 states. [2020-10-14 08:27:07,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63290 states to 63290 states and 100876 transitions. [2020-10-14 08:27:07,269 INFO L78 Accepts]: Start accepts. Automaton has 63290 states and 100876 transitions. Word has length 73 [2020-10-14 08:27:07,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:27:07,269 INFO L479 AbstractCegarLoop]: Abstraction has 63290 states and 100876 transitions. [2020-10-14 08:27:07,269 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-14 08:27:07,270 INFO L276 IsEmpty]: Start isEmpty. Operand 63290 states and 100876 transitions. [2020-10-14 08:27:07,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-14 08:27:07,271 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:27:07,272 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 08:27:07,272 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-14 08:27:07,272 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:27:07,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:27:07,272 INFO L82 PathProgramCache]: Analyzing trace with hash -1978526148, now seen corresponding path program 1 times [2020-10-14 08:27:07,273 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:27:07,273 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1588096675] [2020-10-14 08:27:07,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:27:07,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:27:07,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:27:07,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:27:07,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:27:07,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:27:07,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:27:07,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:27:07,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:27:12,295 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:27:12,295 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-14 08:27:12,296 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 08:27:12,296 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-14 08:27:12,296 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:27:12,296 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:27:12,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 08:27:12,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 49 [2020-10-14 08:27:12,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-14 08:27:12,296 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:27:13,416 WARN L193 SmtUtils]: Spent 1.09 s on a formula simplification that was a NOOP. DAG size: 154 [2020-10-14 08:27:13,416 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:27:13,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:27:13,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:27:13,427 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:27:13,428 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:27:13,428 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:27:13,428 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 08:27:13,428 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:27:13,428 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:27:13,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:27:13,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:27:13,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:27:13,429 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:27:13,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 08:27:13,441 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1588096675] [2020-10-14 08:27:13,441 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:27:13,441 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 08:27:13,446 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727609682] [2020-10-14 08:27:13,448 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 08:27:13,448 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:27:13,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 08:27:13,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 08:27:13,449 INFO L87 Difference]: Start difference. First operand 63290 states and 100876 transitions. Second operand 5 states. [2020-10-14 08:27:13,642 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2020-10-14 08:27:24,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:27:24,493 INFO L93 Difference]: Finished difference Result 202456 states and 324687 transitions. [2020-10-14 08:27:24,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 08:27:24,493 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 74 [2020-10-14 08:27:24,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:27:24,701 INFO L225 Difference]: With dead ends: 202456 [2020-10-14 08:27:24,702 INFO L226 Difference]: Without dead ends: 140174 [2020-10-14 08:27:24,753 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-14 08:27:24,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140174 states. [2020-10-14 08:27:35,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140174 to 101298. [2020-10-14 08:27:35,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101298 states. [2020-10-14 08:27:35,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101298 states to 101298 states and 160804 transitions. [2020-10-14 08:27:35,650 INFO L78 Accepts]: Start accepts. Automaton has 101298 states and 160804 transitions. Word has length 74 [2020-10-14 08:27:35,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:27:35,650 INFO L479 AbstractCegarLoop]: Abstraction has 101298 states and 160804 transitions. [2020-10-14 08:27:35,650 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 08:27:35,650 INFO L276 IsEmpty]: Start isEmpty. Operand 101298 states and 160804 transitions. [2020-10-14 08:27:35,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-14 08:27:35,652 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:27:35,652 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 08:27:35,652 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-14 08:27:35,653 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:27:35,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:27:35,653 INFO L82 PathProgramCache]: Analyzing trace with hash -1257262850, now seen corresponding path program 1 times [2020-10-14 08:27:35,653 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:27:35,653 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [171485964] [2020-10-14 08:27:35,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:27:35,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:27:35,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:27:35,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:27:35,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:27:35,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:27:35,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:27:35,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:27:35,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:27:40,671 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:27:40,671 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-14 08:27:40,671 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 08:27:40,671 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-14 08:27:40,671 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:27:40,671 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:27:40,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-14 08:27:40,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 50 [2020-10-14 08:27:40,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-14 08:27:40,672 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:27:40,846 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-14 08:27:40,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:27:40,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:27:40,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:27:40,856 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:27:40,856 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:27:40,856 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:27:40,856 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-14 08:27:40,856 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:27:40,856 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:27:40,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:27:40,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:27:40,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:27:40,857 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:27:40,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 08:27:40,867 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [171485964] [2020-10-14 08:27:40,867 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:27:40,867 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-14 08:27:40,867 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766899954] [2020-10-14 08:27:40,868 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-14 08:27:40,868 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:27:40,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-14 08:27:40,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-14 08:27:40,868 INFO L87 Difference]: Start difference. First operand 101298 states and 160804 transitions. Second operand 5 states. [2020-10-14 08:27:41,057 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 158 [2020-10-14 08:28:01,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-14 08:28:01,405 INFO L93 Difference]: Finished difference Result 317176 states and 505695 transitions. [2020-10-14 08:28:01,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-14 08:28:01,406 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 75 [2020-10-14 08:28:01,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-14 08:28:01,744 INFO L225 Difference]: With dead ends: 317176 [2020-10-14 08:28:01,744 INFO L226 Difference]: Without dead ends: 216886 [2020-10-14 08:28:01,829 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 [2020-10-14 08:28:01,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216886 states. [2020-10-14 08:28:18,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216886 to 158434. [2020-10-14 08:28:18,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158434 states. [2020-10-14 08:28:18,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158434 states to 158434 states and 250188 transitions. [2020-10-14 08:28:18,672 INFO L78 Accepts]: Start accepts. Automaton has 158434 states and 250188 transitions. Word has length 75 [2020-10-14 08:28:18,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-14 08:28:18,673 INFO L479 AbstractCegarLoop]: Abstraction has 158434 states and 250188 transitions. [2020-10-14 08:28:18,673 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-14 08:28:18,673 INFO L276 IsEmpty]: Start isEmpty. Operand 158434 states and 250188 transitions. [2020-10-14 08:28:18,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-14 08:28:18,674 INFO L414 BasicCegarLoop]: Found error trace [2020-10-14 08:28:18,675 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-14 08:28:18,675 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-14 08:28:18,675 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-14 08:28:18,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-14 08:28:18,675 INFO L82 PathProgramCache]: Analyzing trace with hash 1461543374, now seen corresponding path program 1 times [2020-10-14 08:28:18,675 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-14 08:28:18,675 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [550676136] [2020-10-14 08:28:18,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-14 08:28:18,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:28:18,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:28:18,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:28:18,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:28:18,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:28:18,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:28:18,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:28:18,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:28:23,696 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:28:23,696 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-14 08:28:23,696 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-14 08:28:23,696 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-14 08:28:23,696 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:28:23,696 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:28:23,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-14 08:28:23,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 48 [2020-10-14 08:28:23,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-14 08:28:23,697 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:28:23,905 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-14 08:28:23,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-14 08:28:23,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-14 08:28:23,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-14 08:28:23,916 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-14 08:28:23,916 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-14 08:28:23,916 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-14 08:28:23,916 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-14 08:28:23,916 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-14 08:28:23,917 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.4 [2020-10-14 08:28:23,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-14 08:28:23,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-14 08:28:23,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-14 08:28:23,917 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-14 08:28:23,929 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-14 08:28:23,930 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [550676136] [2020-10-14 08:28:23,930 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-14 08:28:23,930 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-14 08:28:23,930 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174978082] [2020-10-14 08:28:23,930 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-14 08:28:23,930 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-14 08:28:23,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-14 08:28:23,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-14 08:28:23,931 INFO L87 Difference]: Start difference. First operand 158434 states and 250188 transitions. Second operand 6 states. [2020-10-14 08:28:24,169 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 165