/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.2 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.4.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-15 03:19:34,939 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-15 03:19:34,942 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-15 03:19:34,978 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-15 03:19:34,978 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-15 03:19:34,979 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-15 03:19:34,981 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-15 03:19:34,982 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-15 03:19:34,984 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-15 03:19:34,985 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-15 03:19:34,986 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-15 03:19:34,987 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-15 03:19:34,987 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-15 03:19:34,988 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-15 03:19:34,989 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-15 03:19:34,991 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-15 03:19:34,992 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-15 03:19:34,993 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-15 03:19:34,995 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-15 03:19:34,997 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-15 03:19:34,999 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-15 03:19:35,000 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-15 03:19:35,001 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-15 03:19:35,002 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-15 03:19:35,005 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-15 03:19:35,005 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-15 03:19:35,005 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-15 03:19:35,006 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-15 03:19:35,007 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-15 03:19:35,008 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-15 03:19:35,008 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-15 03:19:35,009 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-15 03:19:35,010 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-15 03:19:35,011 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-15 03:19:35,012 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-15 03:19:35,012 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-15 03:19:35,013 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-15 03:19:35,013 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-15 03:19:35,013 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-15 03:19:35,014 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-15 03:19:35,015 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-15 03:19:35,016 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 [2020-10-15 03:19:35,052 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-15 03:19:35,053 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-15 03:19:35,056 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-15 03:19:35,057 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-15 03:19:35,057 INFO L138 SettingsManager]: * Use SBE=true [2020-10-15 03:19:35,057 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-15 03:19:35,058 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-15 03:19:35,058 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-15 03:19:35,058 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-15 03:19:35,058 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-15 03:19:35,059 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-15 03:19:35,059 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-15 03:19:35,059 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-15 03:19:35,061 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-15 03:19:35,062 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-15 03:19:35,063 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-15 03:19:35,064 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-15 03:19:35,065 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-15 03:19:35,066 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-15 03:19:35,067 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-15 03:19:35,067 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-15 03:19:35,069 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-15 03:19:35,070 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-15 03:19:35,070 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-15 03:19:35,070 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-15 03:19:35,071 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-15 03:19:35,072 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-15 03:19:35,072 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-15 03:19:35,073 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-15 03:19:35,073 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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;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=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true;unknown-allowed=true; [2020-10-15 03:19:35,593 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-15 03:19:35,617 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-15 03:19:35,621 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-15 03:19:35,623 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-15 03:19:35,623 INFO L275 PluginConnector]: CDTParser initialized [2020-10-15 03:19:35,624 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.4.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-10-15 03:19:35,716 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/44205dd5f/ed9dba68e229454baa78f9cdf20d3e11/FLAGf9e87720d [2020-10-15 03:19:36,338 INFO L306 CDTParser]: Found 1 translation units. [2020-10-15 03:19:36,339 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.4.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-10-15 03:19:36,357 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/44205dd5f/ed9dba68e229454baa78f9cdf20d3e11/FLAGf9e87720d [2020-10-15 03:19:36,596 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/44205dd5f/ed9dba68e229454baa78f9cdf20d3e11 [2020-10-15 03:19:36,615 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-15 03:19:36,617 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-15 03:19:36,618 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-15 03:19:36,618 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-15 03:19:36,625 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-15 03:19:36,626 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 03:19:36" (1/1) ... [2020-10-15 03:19:36,629 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c43987d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:19:36, skipping insertion in model container [2020-10-15 03:19:36,630 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 03:19:36" (1/1) ... [2020-10-15 03:19:36,640 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-15 03:19:36,691 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-15 03:19:37,105 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-15 03:19:37,121 INFO L203 MainTranslator]: Completed pre-run [2020-10-15 03:19:37,277 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-15 03:19:37,307 INFO L208 MainTranslator]: Completed translation [2020-10-15 03:19:37,308 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:19:37 WrapperNode [2020-10-15 03:19:37,308 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-15 03:19:37,309 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-15 03:19:37,310 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-15 03:19:37,310 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-15 03:19:37,323 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:19:37" (1/1) ... [2020-10-15 03:19:37,325 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:19:37" (1/1) ... [2020-10-15 03:19:37,337 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:19:37" (1/1) ... [2020-10-15 03:19:37,337 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:19:37" (1/1) ... [2020-10-15 03:19:37,353 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:19:37" (1/1) ... [2020-10-15 03:19:37,363 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:19:37" (1/1) ... [2020-10-15 03:19:37,367 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:19:37" (1/1) ... [2020-10-15 03:19:37,372 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-15 03:19:37,372 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-15 03:19:37,372 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-15 03:19:37,373 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-15 03:19:37,374 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:19:37" (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 [2020-10-15 03:19:37,446 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-15 03:19:37,446 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-15 03:19:37,446 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-15 03:19:37,446 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-15 03:19:37,447 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-15 03:19:37,447 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-15 03:19:37,447 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-15 03:19:37,447 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-15 03:19:37,447 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-15 03:19:37,448 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-15 03:19:37,448 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-15 03:19:37,448 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-15 03:19:37,448 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-15 03:19:37,448 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-15 03:19:37,450 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-15 03:19:37,454 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-15 03:19:37,454 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-15 03:19:37,454 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-15 03:19:37,456 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-15 03:19:37,456 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-15 03:19:37,456 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-15 03:19:38,227 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-15 03:19:38,227 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-15 03:19:38,233 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 03:19:38 BoogieIcfgContainer [2020-10-15 03:19:38,233 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-15 03:19:38,235 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-15 03:19:38,235 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-15 03:19:38,238 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-15 03:19:38,239 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 03:19:36" (1/3) ... [2020-10-15 03:19:38,239 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44d13639 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 03:19:38, skipping insertion in model container [2020-10-15 03:19:38,240 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 03:19:37" (2/3) ... [2020-10-15 03:19:38,240 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44d13639 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 03:19:38, skipping insertion in model container [2020-10-15 03:19:38,240 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 03:19:38" (3/3) ... [2020-10-15 03:19:38,242 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_lcr.4.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-10-15 03:19:38,253 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-15 03:19:38,262 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-15 03:19:38,279 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-15 03:19:38,310 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-15 03:19:38,310 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-15 03:19:38,310 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-15 03:19:38,310 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-15 03:19:38,310 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-15 03:19:38,310 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-15 03:19:38,311 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-15 03:19:38,311 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-15 03:19:38,332 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states. [2020-10-15 03:19:38,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-15 03:19:38,342 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:19:38,344 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] [2020-10-15 03:19:38,344 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:19:38,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:19:38,350 INFO L82 PathProgramCache]: Analyzing trace with hash -998305872, now seen corresponding path program 1 times [2020-10-15 03:19:38,360 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:19:38,360 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [282280193] [2020-10-15 03:19:38,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:19:38,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:19:38,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:19:38,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:19:39,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:19:39,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:19:39,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:19:40,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:19:40,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:19:43,667 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:19:43,667 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-15 03:19:43,668 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-15 03:19:43,668 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-10-15 03:19:43,674 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:19:43,675 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:19:43,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-15 03:19:43,676 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-15 03:19:43,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-15 03:19:43,677 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 8 [2020-10-15 03:19:44,111 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-10-15 03:19:44,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:19:44,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:19:44,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:19:44,169 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:19:44,169 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:19:44,169 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:19:44,170 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 36 [2020-10-15 03:19:44,170 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:19:44,170 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:19:44,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 03:19:44,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:19:44,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-15 03:19:44,172 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 03:19:44,217 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 03:19:44,218 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [282280193] [2020-10-15 03:19:44,220 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 03:19:44,221 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-15 03:19:44,222 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342137806] [2020-10-15 03:19:44,227 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-15 03:19:44,228 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:19:44,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-15 03:19:44,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-15 03:19:44,246 INFO L87 Difference]: Start difference. First operand 128 states. Second operand 6 states. [2020-10-15 03:19:44,627 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-10-15 03:19:45,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:19:45,651 INFO L93 Difference]: Finished difference Result 226 states and 371 transitions. [2020-10-15 03:19:45,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-15 03:19:45,654 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 66 [2020-10-15 03:19:45,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:19:45,673 INFO L225 Difference]: With dead ends: 226 [2020-10-15 03:19:45,674 INFO L226 Difference]: Without dead ends: 124 [2020-10-15 03:19:45,679 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-15 03:19:45,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-15 03:19:45,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 124. [2020-10-15 03:19:45,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-15 03:19:45,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 167 transitions. [2020-10-15 03:19:45,766 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 167 transitions. Word has length 66 [2020-10-15 03:19:45,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:19:45,768 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 167 transitions. [2020-10-15 03:19:45,768 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-15 03:19:45,768 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 167 transitions. [2020-10-15 03:19:45,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-15 03:19:45,775 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:19:45,775 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] [2020-10-15 03:19:45,776 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-15 03:19:45,776 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:19:45,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:19:45,776 INFO L82 PathProgramCache]: Analyzing trace with hash 898837651, now seen corresponding path program 1 times [2020-10-15 03:19:45,777 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:19:45,778 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1156051320] [2020-10-15 03:19:45,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:19:45,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:19:45,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:19:45,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:19:45,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:19:46,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:19:46,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:19:46,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:19:46,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:19:47,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:19:47,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:19:47,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:19:48,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:19:50,832 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:19:50,832 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-15 03:19:50,832 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-15 03:19:50,833 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-15 03:19:50,837 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:19:50,837 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:19:50,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-15 03:19:50,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-15 03:19:50,849 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-15 03:19:50,849 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 16 [2020-10-15 03:19:51,164 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 24 [2020-10-15 03:19:51,336 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-10-15 03:19:51,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:19:51,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:19:51,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:19:51,353 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:19:51,354 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:19:51,354 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:19:51,354 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-15 03:19:51,354 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:19:51,354 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:19:51,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 03:19:51,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:19:51,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 03:19:51,355 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 03:19:51,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 03:19:51,397 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1156051320] [2020-10-15 03:19:51,397 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 03:19:51,397 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-15 03:19:51,397 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868376137] [2020-10-15 03:19:51,400 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-15 03:19:51,400 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:19:51,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-15 03:19:51,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-15 03:19:51,403 INFO L87 Difference]: Start difference. First operand 124 states and 167 transitions. Second operand 9 states. [2020-10-15 03:19:51,617 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-15 03:19:52,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:19:52,846 INFO L93 Difference]: Finished difference Result 245 states and 353 transitions. [2020-10-15 03:19:52,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-15 03:19:52,847 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 67 [2020-10-15 03:19:52,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:19:52,851 INFO L225 Difference]: With dead ends: 245 [2020-10-15 03:19:52,852 INFO L226 Difference]: Without dead ends: 188 [2020-10-15 03:19:52,856 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2020-10-15 03:19:52,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2020-10-15 03:19:52,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 124. [2020-10-15 03:19:52,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-15 03:19:52,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 166 transitions. [2020-10-15 03:19:52,898 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 166 transitions. Word has length 67 [2020-10-15 03:19:52,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:19:52,898 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 166 transitions. [2020-10-15 03:19:52,898 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-15 03:19:52,899 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 166 transitions. [2020-10-15 03:19:52,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-15 03:19:52,903 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:19:52,903 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] [2020-10-15 03:19:52,903 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-15 03:19:52,904 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:19:52,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:19:52,904 INFO L82 PathProgramCache]: Analyzing trace with hash 2097698280, now seen corresponding path program 1 times [2020-10-15 03:19:52,904 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:19:52,905 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [318042444] [2020-10-15 03:19:52,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:19:52,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:19:52,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:19:53,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:19:53,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:19:53,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:19:53,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:19:53,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:19:56,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:19:56,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:19:56,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:19:57,947 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:19:57,947 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-15 03:19:57,947 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-15 03:19:57,948 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-15 03:19:57,948 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:19:57,948 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:19:57,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-15 03:19:57,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-15 03:19:57,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-15 03:19:57,949 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 03:19:58,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:19:58,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:19:58,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:19:58,124 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:19:58,124 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:19:58,124 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:19:58,125 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-15 03:19:58,125 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:19:58,125 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:19:58,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 03:19:58,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:19:58,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 03:19:58,126 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 03:19:58,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 03:19:58,142 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [318042444] [2020-10-15 03:19:58,143 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 03:19:58,143 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-15 03:19:58,143 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506396242] [2020-10-15 03:19:58,144 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-15 03:19:58,144 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:19:58,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-15 03:19:58,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-15 03:19:58,145 INFO L87 Difference]: Start difference. First operand 124 states and 166 transitions. Second operand 7 states. [2020-10-15 03:19:58,305 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2020-10-15 03:19:59,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:19:59,128 INFO L93 Difference]: Finished difference Result 566 states and 848 transitions. [2020-10-15 03:19:59,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 03:19:59,129 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 68 [2020-10-15 03:19:59,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:19:59,135 INFO L225 Difference]: With dead ends: 566 [2020-10-15 03:19:59,135 INFO L226 Difference]: Without dead ends: 515 [2020-10-15 03:19:59,136 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-10-15 03:19:59,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2020-10-15 03:19:59,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 189. [2020-10-15 03:19:59,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2020-10-15 03:19:59,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 266 transitions. [2020-10-15 03:19:59,173 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 266 transitions. Word has length 68 [2020-10-15 03:19:59,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:19:59,174 INFO L479 AbstractCegarLoop]: Abstraction has 189 states and 266 transitions. [2020-10-15 03:19:59,174 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-15 03:19:59,174 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 266 transitions. [2020-10-15 03:19:59,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-15 03:19:59,175 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:19:59,175 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] [2020-10-15 03:19:59,176 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-15 03:19:59,176 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:19:59,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:19:59,176 INFO L82 PathProgramCache]: Analyzing trace with hash 1341887635, now seen corresponding path program 1 times [2020-10-15 03:19:59,176 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:19:59,177 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [602741703] [2020-10-15 03:19:59,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:19:59,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:19:59,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:19:59,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:19:59,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:19:59,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:19:59,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:19:59,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:00,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:00,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:00,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:00,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:02,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:03,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:03,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:04,201 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:20:04,202 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-15 03:20:04,202 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-15 03:20:04,202 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-15 03:20:04,202 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:20:04,203 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:20:04,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-15 03:20:04,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-15 03:20:04,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-15 03:20:04,203 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 03:20:04,454 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 25 [2020-10-15 03:20:04,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:20:04,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:20:04,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:04,609 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:20:04,610 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:20:04,610 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:20:04,610 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-15 03:20:04,610 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:20:04,610 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:20:04,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 03:20:04,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:20:04,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 03:20:04,611 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 03:20:04,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 03:20:04,630 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [602741703] [2020-10-15 03:20:04,630 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 03:20:04,630 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-15 03:20:04,631 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502897865] [2020-10-15 03:20:04,631 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-15 03:20:04,631 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:20:04,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-15 03:20:04,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-15 03:20:04,632 INFO L87 Difference]: Start difference. First operand 189 states and 266 transitions. Second operand 10 states. [2020-10-15 03:20:04,778 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2020-10-15 03:20:05,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:20:05,728 INFO L93 Difference]: Finished difference Result 417 states and 617 transitions. [2020-10-15 03:20:05,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 03:20:05,729 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 69 [2020-10-15 03:20:05,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:20:05,733 INFO L225 Difference]: With dead ends: 417 [2020-10-15 03:20:05,734 INFO L226 Difference]: Without dead ends: 311 [2020-10-15 03:20:05,738 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2020-10-15 03:20:05,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2020-10-15 03:20:05,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 189. [2020-10-15 03:20:05,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2020-10-15 03:20:05,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 264 transitions. [2020-10-15 03:20:05,804 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 264 transitions. Word has length 69 [2020-10-15 03:20:05,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:20:05,807 INFO L479 AbstractCegarLoop]: Abstraction has 189 states and 264 transitions. [2020-10-15 03:20:05,808 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-15 03:20:05,808 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 264 transitions. [2020-10-15 03:20:05,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-15 03:20:05,815 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:20:05,816 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] [2020-10-15 03:20:05,816 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-15 03:20:05,816 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:20:05,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:20:05,817 INFO L82 PathProgramCache]: Analyzing trace with hash 484014175, now seen corresponding path program 1 times [2020-10-15 03:20:05,817 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:20:05,817 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1561600419] [2020-10-15 03:20:05,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:20:05,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:20:05,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:05,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:05,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:05,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:06,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:06,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:08,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:08,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:08,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:10,843 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:20:10,843 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-15 03:20:10,843 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-15 03:20:10,843 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-15 03:20:10,844 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:20:10,844 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:20:10,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-15 03:20:10,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-15 03:20:10,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-15 03:20:10,845 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 03:20:11,018 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-10-15 03:20:11,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:20:11,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:20:11,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:11,030 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:20:11,031 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:20:11,031 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:20:11,032 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-15 03:20:11,032 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:20:11,032 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:20:11,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 03:20:11,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:20:11,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 03:20:11,035 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 03:20:11,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 03:20:11,064 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1561600419] [2020-10-15 03:20:11,064 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 03:20:11,064 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-15 03:20:11,064 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601986784] [2020-10-15 03:20:11,065 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-15 03:20:11,065 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:20:11,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-15 03:20:11,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-15 03:20:11,066 INFO L87 Difference]: Start difference. First operand 189 states and 264 transitions. Second operand 5 states. [2020-10-15 03:20:11,193 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2020-10-15 03:20:11,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:20:11,764 INFO L93 Difference]: Finished difference Result 378 states and 555 transitions. [2020-10-15 03:20:11,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-15 03:20:11,764 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 70 [2020-10-15 03:20:11,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:20:11,767 INFO L225 Difference]: With dead ends: 378 [2020-10-15 03:20:11,767 INFO L226 Difference]: Without dead ends: 278 [2020-10-15 03:20:11,770 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-15 03:20:11,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2020-10-15 03:20:11,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 276. [2020-10-15 03:20:11,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 276 states. [2020-10-15 03:20:11,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 396 transitions. [2020-10-15 03:20:11,819 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 396 transitions. Word has length 70 [2020-10-15 03:20:11,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:20:11,820 INFO L479 AbstractCegarLoop]: Abstraction has 276 states and 396 transitions. [2020-10-15 03:20:11,820 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-15 03:20:11,820 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 396 transitions. [2020-10-15 03:20:11,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-15 03:20:11,821 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:20:11,821 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] [2020-10-15 03:20:11,822 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-15 03:20:11,822 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:20:11,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:20:11,822 INFO L82 PathProgramCache]: Analyzing trace with hash 652780190, now seen corresponding path program 1 times [2020-10-15 03:20:11,823 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:20:11,823 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1100220096] [2020-10-15 03:20:11,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:20:11,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:20:11,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:11,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:11,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:11,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:12,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:12,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:13,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:13,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:16,844 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:20:16,844 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-15 03:20:16,845 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-15 03:20:16,845 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-15 03:20:16,845 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:20:16,845 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:20:16,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-15 03:20:16,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-15 03:20:16,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-15 03:20:16,846 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:20:17,027 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:20:17,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:20:17,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:17,043 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:20:17,043 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:20:17,043 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:20:17,044 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-15 03:20:17,044 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:20:17,044 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:20:17,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 03:20:17,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:20:17,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 03:20:17,045 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 03:20:17,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 03:20:17,071 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1100220096] [2020-10-15 03:20:17,072 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 03:20:17,072 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-15 03:20:17,073 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292347424] [2020-10-15 03:20:17,073 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-15 03:20:17,073 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:20:17,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-15 03:20:17,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-15 03:20:17,074 INFO L87 Difference]: Start difference. First operand 276 states and 396 transitions. Second operand 7 states. [2020-10-15 03:20:17,263 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-15 03:20:18,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:20:18,126 INFO L93 Difference]: Finished difference Result 1044 states and 1564 transitions. [2020-10-15 03:20:18,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 03:20:18,127 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 70 [2020-10-15 03:20:18,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:20:18,131 INFO L225 Difference]: With dead ends: 1044 [2020-10-15 03:20:18,131 INFO L226 Difference]: Without dead ends: 857 [2020-10-15 03:20:18,133 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-10-15 03:20:18,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 857 states. [2020-10-15 03:20:18,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 857 to 276. [2020-10-15 03:20:18,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 276 states. [2020-10-15 03:20:18,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 394 transitions. [2020-10-15 03:20:18,176 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 394 transitions. Word has length 70 [2020-10-15 03:20:18,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:20:18,176 INFO L479 AbstractCegarLoop]: Abstraction has 276 states and 394 transitions. [2020-10-15 03:20:18,176 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-15 03:20:18,176 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 394 transitions. [2020-10-15 03:20:18,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-15 03:20:18,177 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:20:18,178 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] [2020-10-15 03:20:18,178 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-15 03:20:18,178 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:20:18,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:20:18,178 INFO L82 PathProgramCache]: Analyzing trace with hash -918531139, now seen corresponding path program 1 times [2020-10-15 03:20:18,179 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:20:18,179 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1557294820] [2020-10-15 03:20:18,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:20:18,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:20:18,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:18,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:18,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:18,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:18,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:18,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:18,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:18,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:18,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:19,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:19,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:19,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:22,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:23,199 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:20:23,200 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-15 03:20:23,200 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-15 03:20:23,200 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-15 03:20:23,200 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:20:23,200 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:20:23,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-15 03:20:23,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-15 03:20:23,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-15 03:20:23,201 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:20:23,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:20:23,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:20:23,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:23,471 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:20:23,471 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:20:23,471 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:20:23,471 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-15 03:20:23,471 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:20:23,471 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:20:23,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 03:20:23,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:20:23,472 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 03:20:23,472 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:20:23,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 03:20:23,488 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1557294820] [2020-10-15 03:20:23,488 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 03:20:23,488 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-15 03:20:23,489 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127329490] [2020-10-15 03:20:23,489 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-15 03:20:23,489 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:20:23,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-15 03:20:23,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-15 03:20:23,490 INFO L87 Difference]: Start difference. First operand 276 states and 394 transitions. Second operand 9 states. [2020-10-15 03:20:23,632 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-10-15 03:20:25,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:20:25,644 INFO L93 Difference]: Finished difference Result 2921 states and 4385 transitions. [2020-10-15 03:20:25,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-15 03:20:25,645 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 70 [2020-10-15 03:20:25,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:20:25,667 INFO L225 Difference]: With dead ends: 2921 [2020-10-15 03:20:25,667 INFO L226 Difference]: Without dead ends: 2728 [2020-10-15 03:20:25,670 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=198, Invalid=672, Unknown=0, NotChecked=0, Total=870 [2020-10-15 03:20:25,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2728 states. [2020-10-15 03:20:25,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2728 to 317. [2020-10-15 03:20:25,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 317 states. [2020-10-15 03:20:25,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 443 transitions. [2020-10-15 03:20:25,763 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 443 transitions. Word has length 70 [2020-10-15 03:20:25,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:20:25,763 INFO L479 AbstractCegarLoop]: Abstraction has 317 states and 443 transitions. [2020-10-15 03:20:25,763 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-15 03:20:25,764 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 443 transitions. [2020-10-15 03:20:25,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-15 03:20:25,764 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:20:25,765 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] [2020-10-15 03:20:25,765 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-15 03:20:25,765 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:20:25,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:20:25,766 INFO L82 PathProgramCache]: Analyzing trace with hash 1104897693, now seen corresponding path program 1 times [2020-10-15 03:20:25,766 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:20:25,766 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1461883187] [2020-10-15 03:20:25,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:20:25,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:20:25,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:25,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:25,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:25,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:26,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:26,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:26,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:26,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:26,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:26,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:26,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:27,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:27,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:27,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:30,791 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:20:30,791 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-15 03:20:30,791 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-15 03:20:30,792 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-15 03:20:30,792 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:20:30,792 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:20:30,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-15 03:20:30,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-15 03:20:30,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-15 03:20:30,793 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:20:30,917 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:20:30,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:20:30,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:30,933 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:20:30,933 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:20:30,933 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:20:30,933 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-15 03:20:30,933 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:20:30,934 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:20:30,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 03:20:30,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:20:30,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-15 03:20:30,934 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:20:30,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 03:20:30,943 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1461883187] [2020-10-15 03:20:30,944 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 03:20:30,944 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-15 03:20:30,944 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57978172] [2020-10-15 03:20:30,944 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-15 03:20:30,945 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:20:30,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-15 03:20:30,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-15 03:20:30,945 INFO L87 Difference]: Start difference. First operand 317 states and 443 transitions. Second operand 6 states. [2020-10-15 03:20:31,086 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-10-15 03:20:31,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:20:31,561 INFO L93 Difference]: Finished difference Result 584 states and 832 transitions. [2020-10-15 03:20:31,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-15 03:20:31,562 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 70 [2020-10-15 03:20:31,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:20:31,564 INFO L225 Difference]: With dead ends: 584 [2020-10-15 03:20:31,564 INFO L226 Difference]: Without dead ends: 317 [2020-10-15 03:20:31,565 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-15 03:20:31,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2020-10-15 03:20:31,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 317. [2020-10-15 03:20:31,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 317 states. [2020-10-15 03:20:31,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 437 transitions. [2020-10-15 03:20:31,611 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 437 transitions. Word has length 70 [2020-10-15 03:20:31,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:20:31,611 INFO L479 AbstractCegarLoop]: Abstraction has 317 states and 437 transitions. [2020-10-15 03:20:31,611 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-15 03:20:31,611 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 437 transitions. [2020-10-15 03:20:31,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-15 03:20:31,612 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:20:31,612 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] [2020-10-15 03:20:31,613 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-15 03:20:31,613 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:20:31,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:20:31,613 INFO L82 PathProgramCache]: Analyzing trace with hash -441636832, now seen corresponding path program 1 times [2020-10-15 03:20:31,613 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:20:31,614 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1747391811] [2020-10-15 03:20:31,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:20:31,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:20:31,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:31,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:31,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:31,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:31,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:31,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:32,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:32,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:32,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:33,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:33,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:33,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:33,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:33,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:34,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:34,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:34,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:34,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:36,634 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:20:36,634 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-15 03:20:36,634 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-15 03:20:36,634 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-15 03:20:36,634 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:20:36,635 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:20:36,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-15 03:20:36,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-15 03:20:36,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-15 03:20:36,635 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:20:36,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:20:36,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:20:36,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:36,901 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:20:36,901 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:20:36,901 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:20:36,901 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-15 03:20:36,902 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:20:36,902 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:20:36,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 03:20:36,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:20:36,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 03:20:36,903 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 03:20:36,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 03:20:36,917 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1747391811] [2020-10-15 03:20:36,918 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 03:20:36,918 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-15 03:20:36,918 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264981063] [2020-10-15 03:20:36,918 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-15 03:20:36,919 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:20:36,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-15 03:20:36,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-15 03:20:36,919 INFO L87 Difference]: Start difference. First operand 317 states and 437 transitions. Second operand 8 states. [2020-10-15 03:20:37,086 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 125 [2020-10-15 03:20:37,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:20:37,906 INFO L93 Difference]: Finished difference Result 741 states and 1057 transitions. [2020-10-15 03:20:37,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-15 03:20:37,906 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 71 [2020-10-15 03:20:37,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:20:37,909 INFO L225 Difference]: With dead ends: 741 [2020-10-15 03:20:37,909 INFO L226 Difference]: Without dead ends: 506 [2020-10-15 03:20:37,910 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-15 03:20:37,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2020-10-15 03:20:37,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 317. [2020-10-15 03:20:37,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 317 states. [2020-10-15 03:20:37,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 435 transitions. [2020-10-15 03:20:37,964 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 435 transitions. Word has length 71 [2020-10-15 03:20:37,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:20:37,965 INFO L479 AbstractCegarLoop]: Abstraction has 317 states and 435 transitions. [2020-10-15 03:20:37,965 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-15 03:20:37,965 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 435 transitions. [2020-10-15 03:20:37,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-15 03:20:37,966 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:20:37,966 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 03:20:37,966 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-15 03:20:37,966 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:20:37,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:20:37,967 INFO L82 PathProgramCache]: Analyzing trace with hash -1282736703, now seen corresponding path program 1 times [2020-10-15 03:20:37,967 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:20:37,967 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [275328828] [2020-10-15 03:20:37,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:20:37,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:20:37,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:38,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:38,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:38,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:38,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:38,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:38,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:39,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:39,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:42,986 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:20:42,986 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-15 03:20:42,986 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-15 03:20:42,987 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-15 03:20:42,987 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:20:42,987 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:20:42,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-15 03:20:42,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-15 03:20:42,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-15 03:20:42,988 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:20:43,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:20:43,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:20:43,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:43,119 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:20:43,120 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:20:43,120 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:20:43,120 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-15 03:20:43,120 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:20:43,120 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:20:43,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 03:20:43,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:20:43,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 03:20:43,121 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:20:43,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 03:20:43,131 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [275328828] [2020-10-15 03:20:43,132 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 03:20:43,132 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-15 03:20:43,132 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252585034] [2020-10-15 03:20:43,132 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-15 03:20:43,133 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:20:43,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-15 03:20:43,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-15 03:20:43,133 INFO L87 Difference]: Start difference. First operand 317 states and 435 transitions. Second operand 6 states. [2020-10-15 03:20:44,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:20:44,588 INFO L93 Difference]: Finished difference Result 1861 states and 2680 transitions. [2020-10-15 03:20:44,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 03:20:44,589 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 71 [2020-10-15 03:20:44,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:20:44,598 INFO L225 Difference]: With dead ends: 1861 [2020-10-15 03:20:44,599 INFO L226 Difference]: Without dead ends: 1645 [2020-10-15 03:20:44,600 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-10-15 03:20:44,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1645 states. [2020-10-15 03:20:44,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1645 to 1050. [2020-10-15 03:20:44,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1050 states. [2020-10-15 03:20:44,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1050 states to 1050 states and 1484 transitions. [2020-10-15 03:20:44,786 INFO L78 Accepts]: Start accepts. Automaton has 1050 states and 1484 transitions. Word has length 71 [2020-10-15 03:20:44,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:20:44,786 INFO L479 AbstractCegarLoop]: Abstraction has 1050 states and 1484 transitions. [2020-10-15 03:20:44,786 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-15 03:20:44,787 INFO L276 IsEmpty]: Start isEmpty. Operand 1050 states and 1484 transitions. [2020-10-15 03:20:44,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-15 03:20:44,788 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:20:44,788 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] [2020-10-15 03:20:44,788 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-15 03:20:44,788 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:20:44,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:20:44,789 INFO L82 PathProgramCache]: Analyzing trace with hash -969786353, now seen corresponding path program 1 times [2020-10-15 03:20:44,789 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:20:44,789 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [102489030] [2020-10-15 03:20:44,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:20:44,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:20:44,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:44,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:44,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:45,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:45,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:45,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:45,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:45,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:45,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:45,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:45,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:46,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:46,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:46,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:49,806 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:20:49,807 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-15 03:20:49,807 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-15 03:20:49,807 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-15 03:20:49,807 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:20:49,807 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:20:49,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-15 03:20:49,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-15 03:20:49,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-15 03:20:49,808 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:20:50,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:20:50,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:20:50,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:50,092 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:20:50,092 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:20:50,092 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:20:50,092 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-15 03:20:50,092 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:20:50,092 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:20:50,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 03:20:50,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:20:50,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 03:20:50,093 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:20:50,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 03:20:50,102 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [102489030] [2020-10-15 03:20:50,102 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 03:20:50,103 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-15 03:20:50,103 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693929130] [2020-10-15 03:20:50,103 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-15 03:20:50,104 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:20:50,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-15 03:20:50,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-15 03:20:50,104 INFO L87 Difference]: Start difference. First operand 1050 states and 1484 transitions. Second operand 9 states. [2020-10-15 03:20:50,272 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-15 03:20:52,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:20:52,643 INFO L93 Difference]: Finished difference Result 2557 states and 3666 transitions. [2020-10-15 03:20:52,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-15 03:20:52,644 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 72 [2020-10-15 03:20:52,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:20:52,653 INFO L225 Difference]: With dead ends: 2557 [2020-10-15 03:20:52,653 INFO L226 Difference]: Without dead ends: 1848 [2020-10-15 03:20:52,656 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=103, Invalid=359, Unknown=0, NotChecked=0, Total=462 [2020-10-15 03:20:52,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1848 states. [2020-10-15 03:20:52,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1848 to 1050. [2020-10-15 03:20:52,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1050 states. [2020-10-15 03:20:52,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1050 states to 1050 states and 1474 transitions. [2020-10-15 03:20:52,972 INFO L78 Accepts]: Start accepts. Automaton has 1050 states and 1474 transitions. Word has length 72 [2020-10-15 03:20:52,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:20:52,973 INFO L479 AbstractCegarLoop]: Abstraction has 1050 states and 1474 transitions. [2020-10-15 03:20:52,973 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-15 03:20:52,973 INFO L276 IsEmpty]: Start isEmpty. Operand 1050 states and 1474 transitions. [2020-10-15 03:20:52,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-15 03:20:52,975 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:20:52,976 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] [2020-10-15 03:20:52,976 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-15 03:20:52,976 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:20:52,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:20:52,977 INFO L82 PathProgramCache]: Analyzing trace with hash 1807812933, now seen corresponding path program 1 times [2020-10-15 03:20:52,977 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:20:52,977 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [43214734] [2020-10-15 03:20:52,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:20:53,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:20:53,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:53,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:53,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:53,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:53,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:53,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:53,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:53,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:53,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:54,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:54,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:54,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:56,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:56,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:56,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:57,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:57,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:58,003 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:20:58,003 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-15 03:20:58,003 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-15 03:20:58,003 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-15 03:20:58,003 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:20:58,003 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:20:58,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-15 03:20:58,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-15 03:20:58,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-15 03:20:58,004 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:20:58,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:20:58,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:20:58,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:58,190 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:20:58,191 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:20:58,191 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:20:58,191 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-15 03:20:58,191 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:20:58,191 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:20:58,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 03:20:58,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:20:58,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-15 03:20:58,192 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:20:58,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 03:20:58,204 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [43214734] [2020-10-15 03:20:58,204 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 03:20:58,204 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-15 03:20:58,204 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282374786] [2020-10-15 03:20:58,205 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-15 03:20:58,205 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:20:58,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-15 03:20:58,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-10-15 03:20:58,206 INFO L87 Difference]: Start difference. First operand 1050 states and 1474 transitions. Second operand 9 states. [2020-10-15 03:20:59,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:20:59,633 INFO L93 Difference]: Finished difference Result 2954 states and 4256 transitions. [2020-10-15 03:20:59,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-15 03:20:59,634 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 72 [2020-10-15 03:20:59,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:20:59,643 INFO L225 Difference]: With dead ends: 2954 [2020-10-15 03:20:59,643 INFO L226 Difference]: Without dead ends: 2132 [2020-10-15 03:20:59,646 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2020-10-15 03:20:59,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2132 states. [2020-10-15 03:20:59,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2132 to 998. [2020-10-15 03:20:59,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 998 states. [2020-10-15 03:20:59,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 998 states to 998 states and 1388 transitions. [2020-10-15 03:20:59,888 INFO L78 Accepts]: Start accepts. Automaton has 998 states and 1388 transitions. Word has length 72 [2020-10-15 03:20:59,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:20:59,889 INFO L479 AbstractCegarLoop]: Abstraction has 998 states and 1388 transitions. [2020-10-15 03:20:59,889 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-15 03:20:59,889 INFO L276 IsEmpty]: Start isEmpty. Operand 998 states and 1388 transitions. [2020-10-15 03:20:59,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-15 03:20:59,890 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:20:59,891 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] [2020-10-15 03:20:59,891 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-15 03:20:59,891 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:20:59,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:20:59,891 INFO L82 PathProgramCache]: Analyzing trace with hash -1375628105, now seen corresponding path program 1 times [2020-10-15 03:20:59,892 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:20:59,892 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [99120317] [2020-10-15 03:20:59,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:20:59,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:20:59,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:20:59,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:21:00,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:21:00,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:21:00,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:21:04,918 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:21:04,919 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-15 03:21:04,919 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-15 03:21:04,919 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-15 03:21:04,919 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:21:04,919 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:21:04,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-15 03:21:04,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-15 03:21:04,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-15 03:21:04,920 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:21:05,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:21:05,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:21:05,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:21:05,056 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:21:05,056 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:21:05,056 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:21:05,056 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-15 03:21:05,056 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:21:05,056 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:21:05,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 03:21:05,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:21:05,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 03:21:05,057 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:21:05,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 03:21:05,066 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [99120317] [2020-10-15 03:21:05,066 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 03:21:05,066 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-15 03:21:05,066 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939566596] [2020-10-15 03:21:05,067 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-15 03:21:05,067 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:21:05,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-15 03:21:05,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-15 03:21:05,068 INFO L87 Difference]: Start difference. First operand 998 states and 1388 transitions. Second operand 6 states. [2020-10-15 03:21:05,208 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2020-10-15 03:21:06,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:21:06,027 INFO L93 Difference]: Finished difference Result 2452 states and 3524 transitions. [2020-10-15 03:21:06,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-15 03:21:06,028 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 73 [2020-10-15 03:21:06,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:21:06,034 INFO L225 Difference]: With dead ends: 2452 [2020-10-15 03:21:06,034 INFO L226 Difference]: Without dead ends: 1722 [2020-10-15 03:21:06,037 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-15 03:21:06,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1722 states. [2020-10-15 03:21:06,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1722 to 1718. [2020-10-15 03:21:06,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1718 states. [2020-10-15 03:21:06,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1718 states to 1718 states and 2437 transitions. [2020-10-15 03:21:06,389 INFO L78 Accepts]: Start accepts. Automaton has 1718 states and 2437 transitions. Word has length 73 [2020-10-15 03:21:06,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:21:06,389 INFO L479 AbstractCegarLoop]: Abstraction has 1718 states and 2437 transitions. [2020-10-15 03:21:06,389 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-15 03:21:06,390 INFO L276 IsEmpty]: Start isEmpty. Operand 1718 states and 2437 transitions. [2020-10-15 03:21:06,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-15 03:21:06,391 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:21:06,392 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] [2020-10-15 03:21:06,392 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-15 03:21:06,392 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:21:06,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:21:06,393 INFO L82 PathProgramCache]: Analyzing trace with hash -1786832650, now seen corresponding path program 1 times [2020-10-15 03:21:06,393 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:21:06,393 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1874736927] [2020-10-15 03:21:06,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:21:06,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:21:06,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:21:06,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:21:06,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:21:06,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:21:09,805 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:21:09,805 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-15 03:21:09,805 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-15 03:21:09,806 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3389 [2020-10-15 03:21:09,806 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:21:09,806 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:21:09,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-15 03:21:09,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-15 03:21:09,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-15 03:21:09,806 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:21:09,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:21:09,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:21:09,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:21:09,943 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:21:09,943 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:21:09,943 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:21:09,943 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-15 03:21:09,943 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:21:09,944 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:21:09,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 03:21:09,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:21:09,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 03:21:09,944 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:21:09,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 03:21:09,953 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1874736927] [2020-10-15 03:21:09,954 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 03:21:09,954 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-15 03:21:09,954 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871611691] [2020-10-15 03:21:09,954 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-15 03:21:09,954 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:21:09,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-15 03:21:09,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-15 03:21:09,955 INFO L87 Difference]: Start difference. First operand 1718 states and 2437 transitions. Second operand 6 states. [2020-10-15 03:21:10,099 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2020-10-15 03:21:11,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:21:11,031 INFO L93 Difference]: Finished difference Result 3424 states and 4947 transitions. [2020-10-15 03:21:11,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-15 03:21:11,032 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 73 [2020-10-15 03:21:11,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:21:11,040 INFO L225 Difference]: With dead ends: 3424 [2020-10-15 03:21:11,040 INFO L226 Difference]: Without dead ends: 2499 [2020-10-15 03:21:11,042 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-15 03:21:11,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2499 states. [2020-10-15 03:21:11,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2499 to 2165. [2020-10-15 03:21:11,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2165 states. [2020-10-15 03:21:11,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2165 states to 2165 states and 3103 transitions. [2020-10-15 03:21:11,385 INFO L78 Accepts]: Start accepts. Automaton has 2165 states and 3103 transitions. Word has length 73 [2020-10-15 03:21:11,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:21:11,386 INFO L479 AbstractCegarLoop]: Abstraction has 2165 states and 3103 transitions. [2020-10-15 03:21:11,386 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-15 03:21:11,386 INFO L276 IsEmpty]: Start isEmpty. Operand 2165 states and 3103 transitions. [2020-10-15 03:21:11,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-15 03:21:11,387 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:21:11,388 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] [2020-10-15 03:21:11,388 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-15 03:21:11,388 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:21:11,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:21:11,388 INFO L82 PathProgramCache]: Analyzing trace with hash 1023842361, now seen corresponding path program 1 times [2020-10-15 03:21:11,388 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:21:11,389 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1204107340] [2020-10-15 03:21:11,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:21:11,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:21:11,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:21:11,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:21:11,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:21:11,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:21:11,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:21:16,416 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:21:16,417 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-15 03:21:16,417 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-15 03:21:16,417 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-15 03:21:16,418 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:21:16,418 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:21:16,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-15 03:21:16,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-15 03:21:16,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-15 03:21:16,419 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 03:21:16,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:21:16,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:21:16,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:21:16,569 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:21:16,569 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:21:16,570 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:21:16,570 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-15 03:21:16,570 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:21:16,570 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:21:16,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 03:21:16,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:21:16,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 03:21:16,571 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:21:16,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 03:21:16,583 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1204107340] [2020-10-15 03:21:16,583 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 03:21:16,583 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-15 03:21:16,583 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777903875] [2020-10-15 03:21:16,584 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-15 03:21:16,584 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:21:16,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-15 03:21:16,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-15 03:21:16,584 INFO L87 Difference]: Start difference. First operand 2165 states and 3103 transitions. Second operand 6 states. [2020-10-15 03:21:16,739 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2020-10-15 03:21:17,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:21:17,671 INFO L93 Difference]: Finished difference Result 4711 states and 6826 transitions. [2020-10-15 03:21:17,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-15 03:21:17,672 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 73 [2020-10-15 03:21:17,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:21:17,681 INFO L225 Difference]: With dead ends: 4711 [2020-10-15 03:21:17,682 INFO L226 Difference]: Without dead ends: 2895 [2020-10-15 03:21:17,685 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-15 03:21:17,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2895 states. [2020-10-15 03:21:18,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2895 to 2529. [2020-10-15 03:21:18,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2529 states. [2020-10-15 03:21:18,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2529 states to 2529 states and 3639 transitions. [2020-10-15 03:21:18,141 INFO L78 Accepts]: Start accepts. Automaton has 2529 states and 3639 transitions. Word has length 73 [2020-10-15 03:21:18,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:21:18,142 INFO L479 AbstractCegarLoop]: Abstraction has 2529 states and 3639 transitions. [2020-10-15 03:21:18,142 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-15 03:21:18,142 INFO L276 IsEmpty]: Start isEmpty. Operand 2529 states and 3639 transitions. [2020-10-15 03:21:18,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-15 03:21:18,143 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:21:18,143 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] [2020-10-15 03:21:18,144 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-15 03:21:18,144 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:21:18,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:21:18,144 INFO L82 PathProgramCache]: Analyzing trace with hash -925023955, now seen corresponding path program 1 times [2020-10-15 03:21:18,144 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:21:18,145 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [749899274] [2020-10-15 03:21:18,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:21:18,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:21:18,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:21:18,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:21:18,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:21:18,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:21:19,109 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:21:19,109 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-15 03:21:19,109 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-15 03:21:19,109 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 950 [2020-10-15 03:21:19,110 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:21:19,110 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:21:19,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-15 03:21:19,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-15 03:21:19,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-15 03:21:19,110 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:21:19,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:21:19,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:21:19,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:21:19,253 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:21:19,253 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:21:19,253 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:21:19,254 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-15 03:21:19,254 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:21:19,254 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:21:19,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 03:21:19,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:21:19,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-15 03:21:19,254 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:21:19,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 03:21:19,265 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [749899274] [2020-10-15 03:21:19,265 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 03:21:19,265 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-15 03:21:19,265 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702917694] [2020-10-15 03:21:19,266 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-15 03:21:19,266 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:21:19,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-15 03:21:19,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-15 03:21:19,266 INFO L87 Difference]: Start difference. First operand 2529 states and 3639 transitions. Second operand 6 states. [2020-10-15 03:21:19,404 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2020-10-15 03:21:20,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:21:20,231 INFO L93 Difference]: Finished difference Result 3615 states and 5251 transitions. [2020-10-15 03:21:20,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-15 03:21:20,231 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 73 [2020-10-15 03:21:20,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:21:20,238 INFO L225 Difference]: With dead ends: 3615 [2020-10-15 03:21:20,238 INFO L226 Difference]: Without dead ends: 1888 [2020-10-15 03:21:20,241 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-15 03:21:20,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1888 states. [2020-10-15 03:21:20,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1888 to 1345. [2020-10-15 03:21:20,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1345 states. [2020-10-15 03:21:20,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1345 states to 1345 states and 1925 transitions. [2020-10-15 03:21:20,483 INFO L78 Accepts]: Start accepts. Automaton has 1345 states and 1925 transitions. Word has length 73 [2020-10-15 03:21:20,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:21:20,483 INFO L479 AbstractCegarLoop]: Abstraction has 1345 states and 1925 transitions. [2020-10-15 03:21:20,483 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-15 03:21:20,483 INFO L276 IsEmpty]: Start isEmpty. Operand 1345 states and 1925 transitions. [2020-10-15 03:21:20,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-15 03:21:20,484 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:21:20,485 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] [2020-10-15 03:21:20,485 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-15 03:21:20,485 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:21:20,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:21:20,485 INFO L82 PathProgramCache]: Analyzing trace with hash -400269564, now seen corresponding path program 1 times [2020-10-15 03:21:20,485 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:21:20,486 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [853438751] [2020-10-15 03:21:20,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:21:20,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:21:20,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:21:20,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:21:20,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:21:20,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:21:21,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:21:25,288 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:21:25,288 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-15 03:21:25,288 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-15 03:21:25,288 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4786 [2020-10-15 03:21:25,288 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:21:25,289 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:21:25,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-15 03:21:25,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-15 03:21:25,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-15 03:21:25,289 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:21:25,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:21:25,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:21:25,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:21:25,621 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:21:25,621 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:21:25,621 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:21:25,621 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-15 03:21:25,621 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:21:25,621 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:21:25,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 03:21:25,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:21:25,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 03:21:25,622 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:21:25,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 03:21:25,636 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [853438751] [2020-10-15 03:21:25,637 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 03:21:25,637 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-15 03:21:25,637 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818610782] [2020-10-15 03:21:25,637 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-15 03:21:25,638 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:21:25,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-15 03:21:25,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-15 03:21:25,638 INFO L87 Difference]: Start difference. First operand 1345 states and 1925 transitions. Second operand 9 states. [2020-10-15 03:21:25,781 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2020-10-15 03:21:26,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:21:26,923 INFO L93 Difference]: Finished difference Result 3309 states and 4825 transitions. [2020-10-15 03:21:26,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-15 03:21:26,924 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 74 [2020-10-15 03:21:26,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:21:26,932 INFO L225 Difference]: With dead ends: 3309 [2020-10-15 03:21:26,932 INFO L226 Difference]: Without dead ends: 2344 [2020-10-15 03:21:26,934 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-15 03:21:26,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2344 states. [2020-10-15 03:21:27,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2344 to 1256. [2020-10-15 03:21:27,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1256 states. [2020-10-15 03:21:27,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1256 states to 1256 states and 1802 transitions. [2020-10-15 03:21:27,167 INFO L78 Accepts]: Start accepts. Automaton has 1256 states and 1802 transitions. Word has length 74 [2020-10-15 03:21:27,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:21:27,168 INFO L479 AbstractCegarLoop]: Abstraction has 1256 states and 1802 transitions. [2020-10-15 03:21:27,168 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-15 03:21:27,168 INFO L276 IsEmpty]: Start isEmpty. Operand 1256 states and 1802 transitions. [2020-10-15 03:21:27,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-15 03:21:27,168 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:21:27,169 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] [2020-10-15 03:21:27,169 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-15 03:21:27,169 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:21:27,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:21:27,169 INFO L82 PathProgramCache]: Analyzing trace with hash -24286803, now seen corresponding path program 1 times [2020-10-15 03:21:27,169 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:21:27,169 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [109236010] [2020-10-15 03:21:27,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:21:27,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:21:27,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:21:27,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:21:27,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:21:28,555 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:21:28,555 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-15 03:21:28,555 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-15 03:21:28,555 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1373 [2020-10-15 03:21:28,556 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:21:28,556 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:21:28,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-15 03:21:28,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-15 03:21:28,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-15 03:21:28,556 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:21:28,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:21:28,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:21:28,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:21:28,840 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:21:28,840 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:21:28,840 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:21:28,840 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-15 03:21:28,840 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:21:28,840 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:21:28,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 03:21:28,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:21:28,841 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 03:21:28,841 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:21:28,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 03:21:28,858 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [109236010] [2020-10-15 03:21:28,858 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 03:21:28,858 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-15 03:21:28,859 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213884116] [2020-10-15 03:21:28,859 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-15 03:21:28,859 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:21:28,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-15 03:21:28,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-15 03:21:28,860 INFO L87 Difference]: Start difference. First operand 1256 states and 1802 transitions. Second operand 10 states. [2020-10-15 03:21:29,019 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2020-10-15 03:21:30,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:21:30,387 INFO L93 Difference]: Finished difference Result 2883 states and 4195 transitions. [2020-10-15 03:21:30,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 03:21:30,387 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 75 [2020-10-15 03:21:30,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:21:30,395 INFO L225 Difference]: With dead ends: 2883 [2020-10-15 03:21:30,395 INFO L226 Difference]: Without dead ends: 1759 [2020-10-15 03:21:30,398 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2020-10-15 03:21:30,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1759 states. [2020-10-15 03:21:30,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1759 to 1216. [2020-10-15 03:21:30,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1216 states. [2020-10-15 03:21:30,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1216 states to 1216 states and 1748 transitions. [2020-10-15 03:21:30,679 INFO L78 Accepts]: Start accepts. Automaton has 1216 states and 1748 transitions. Word has length 75 [2020-10-15 03:21:30,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:21:30,679 INFO L479 AbstractCegarLoop]: Abstraction has 1216 states and 1748 transitions. [2020-10-15 03:21:30,679 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-15 03:21:30,679 INFO L276 IsEmpty]: Start isEmpty. Operand 1216 states and 1748 transitions. [2020-10-15 03:21:30,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-15 03:21:30,680 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:21:30,680 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] [2020-10-15 03:21:30,680 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-15 03:21:30,680 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:21:30,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:21:30,681 INFO L82 PathProgramCache]: Analyzing trace with hash 1575607802, now seen corresponding path program 1 times [2020-10-15 03:21:30,681 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:21:30,681 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1890714552] [2020-10-15 03:21:30,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:21:30,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:21:30,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:21:30,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:21:30,909 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:21:30,910 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-15 03:21:30,910 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 03:21:30,910 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 217 [2020-10-15 03:21:30,910 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:21:30,910 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:21:30,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-15 03:21:30,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-15 03:21:30,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-15 03:21:30,911 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:21:31,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:21:31,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:21:31,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:21:31,056 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:21:31,057 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:21:31,057 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:21:31,057 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-15 03:21:31,057 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:21:31,057 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:21:31,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 03:21:31,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:21:31,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-15 03:21:31,058 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:21:31,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 03:21:31,066 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1890714552] [2020-10-15 03:21:31,066 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 03:21:31,066 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-15 03:21:31,067 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371455769] [2020-10-15 03:21:31,067 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-15 03:21:31,067 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:21:31,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-15 03:21:31,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-15 03:21:31,068 INFO L87 Difference]: Start difference. First operand 1216 states and 1748 transitions. Second operand 6 states. [2020-10-15 03:21:31,206 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2020-10-15 03:21:32,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:21:32,292 INFO L93 Difference]: Finished difference Result 3352 states and 4920 transitions. [2020-10-15 03:21:32,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-15 03:21:32,293 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 75 [2020-10-15 03:21:32,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:21:32,303 INFO L225 Difference]: With dead ends: 3352 [2020-10-15 03:21:32,303 INFO L226 Difference]: Without dead ends: 2225 [2020-10-15 03:21:32,306 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-15 03:21:32,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2225 states. [2020-10-15 03:21:32,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2225 to 2223. [2020-10-15 03:21:32,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2223 states. [2020-10-15 03:21:32,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2223 states to 2223 states and 3247 transitions. [2020-10-15 03:21:32,781 INFO L78 Accepts]: Start accepts. Automaton has 2223 states and 3247 transitions. Word has length 75 [2020-10-15 03:21:32,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:21:32,782 INFO L479 AbstractCegarLoop]: Abstraction has 2223 states and 3247 transitions. [2020-10-15 03:21:32,782 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-15 03:21:32,782 INFO L276 IsEmpty]: Start isEmpty. Operand 2223 states and 3247 transitions. [2020-10-15 03:21:32,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-15 03:21:32,783 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:21:32,783 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] [2020-10-15 03:21:32,783 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-15 03:21:32,783 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:21:32,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:21:32,784 INFO L82 PathProgramCache]: Analyzing trace with hash -754889942, now seen corresponding path program 1 times [2020-10-15 03:21:32,784 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:21:32,784 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [201395703] [2020-10-15 03:21:32,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:21:32,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:21:32,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:21:32,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:21:32,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:21:33,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:21:33,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:21:34,133 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:21:34,133 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-15 03:21:34,133 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-15 03:21:34,133 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1307 [2020-10-15 03:21:34,133 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:21:34,133 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:21:34,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-15 03:21:34,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-15 03:21:34,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-15 03:21:34,134 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:21:34,305 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 24 [2020-10-15 03:21:34,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:21:34,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:21:34,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:21:34,446 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:21:34,447 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:21:34,447 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:21:34,447 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-15 03:21:34,447 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:21:34,447 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:21:34,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 03:21:34,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:21:34,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 03:21:34,448 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:21:34,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 03:21:34,459 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [201395703] [2020-10-15 03:21:34,460 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 03:21:34,460 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-15 03:21:34,460 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218807850] [2020-10-15 03:21:34,460 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-15 03:21:34,460 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:21:34,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-15 03:21:34,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-15 03:21:34,461 INFO L87 Difference]: Start difference. First operand 2223 states and 3247 transitions. Second operand 9 states. [2020-10-15 03:21:34,622 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-15 03:21:36,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:21:36,470 INFO L93 Difference]: Finished difference Result 5405 states and 7927 transitions. [2020-10-15 03:21:36,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-15 03:21:36,471 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 76 [2020-10-15 03:21:36,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:21:36,480 INFO L225 Difference]: With dead ends: 5405 [2020-10-15 03:21:36,481 INFO L226 Difference]: Without dead ends: 3283 [2020-10-15 03:21:36,485 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2020-10-15 03:21:36,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3283 states. [2020-10-15 03:21:36,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3283 to 2223. [2020-10-15 03:21:36,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2223 states. [2020-10-15 03:21:36,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2223 states to 2223 states and 3243 transitions. [2020-10-15 03:21:36,960 INFO L78 Accepts]: Start accepts. Automaton has 2223 states and 3243 transitions. Word has length 76 [2020-10-15 03:21:36,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:21:36,960 INFO L479 AbstractCegarLoop]: Abstraction has 2223 states and 3243 transitions. [2020-10-15 03:21:36,960 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-15 03:21:36,960 INFO L276 IsEmpty]: Start isEmpty. Operand 2223 states and 3243 transitions. [2020-10-15 03:21:36,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-15 03:21:36,961 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:21:36,961 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 03:21:36,961 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-15 03:21:36,961 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:21:36,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:21:36,961 INFO L82 PathProgramCache]: Analyzing trace with hash 1192230335, now seen corresponding path program 1 times [2020-10-15 03:21:36,961 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:21:36,961 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [926317477] [2020-10-15 03:21:36,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:21:36,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:21:36,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:21:37,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:21:37,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:21:38,524 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:21:38,525 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-15 03:21:38,525 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-15 03:21:38,525 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1548 [2020-10-15 03:21:38,525 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:21:38,525 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:21:38,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-15 03:21:38,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-15 03:21:38,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-15 03:21:38,526 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:21:39,124 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 50 [2020-10-15 03:21:39,914 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-10-15 03:21:39,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:21:39,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:21:39,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:21:39,926 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:21:39,927 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:21:39,927 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:21:39,927 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-15 03:21:39,927 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:21:39,927 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:21:39,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 03:21:39,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:21:39,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 03:21:39,928 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:21:39,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 03:21:39,964 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [926317477] [2020-10-15 03:21:39,964 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 03:21:39,964 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2020-10-15 03:21:39,964 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313555062] [2020-10-15 03:21:39,965 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-15 03:21:39,965 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:21:39,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-15 03:21:39,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=456, Unknown=0, NotChecked=0, Total=506 [2020-10-15 03:21:39,966 INFO L87 Difference]: Start difference. First operand 2223 states and 3243 transitions. Second operand 23 states. [2020-10-15 03:21:40,136 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 60 [2020-10-15 03:21:40,660 WARN L193 SmtUtils]: Spent 427.00 ms on a formula simplification. DAG size of input: 181 DAG size of output: 159 [2020-10-15 03:21:41,376 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 39 [2020-10-15 03:21:41,617 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 54 [2020-10-15 03:21:41,858 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 60 [2020-10-15 03:21:42,197 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 78 [2020-10-15 03:21:42,540 WARN L193 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 126 DAG size of output: 84 [2020-10-15 03:21:43,018 WARN L193 SmtUtils]: Spent 361.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 100 [2020-10-15 03:21:43,188 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 49 [2020-10-15 03:21:43,375 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 49 [2020-10-15 03:21:43,557 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 56 [2020-10-15 03:21:43,757 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 56 [2020-10-15 03:21:52,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:21:52,469 INFO L93 Difference]: Finished difference Result 17461 states and 25716 transitions. [2020-10-15 03:21:52,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-15 03:21:52,469 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 77 [2020-10-15 03:21:52,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:21:52,504 INFO L225 Difference]: With dead ends: 17461 [2020-10-15 03:21:52,504 INFO L226 Difference]: Without dead ends: 15341 [2020-10-15 03:21:52,513 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=283, Invalid=1609, Unknown=0, NotChecked=0, Total=1892 [2020-10-15 03:21:52,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15341 states. [2020-10-15 03:21:53,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15341 to 2232. [2020-10-15 03:21:53,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2232 states. [2020-10-15 03:21:53,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2232 states to 2232 states and 3253 transitions. [2020-10-15 03:21:53,479 INFO L78 Accepts]: Start accepts. Automaton has 2232 states and 3253 transitions. Word has length 77 [2020-10-15 03:21:53,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:21:53,480 INFO L479 AbstractCegarLoop]: Abstraction has 2232 states and 3253 transitions. [2020-10-15 03:21:53,480 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-15 03:21:53,480 INFO L276 IsEmpty]: Start isEmpty. Operand 2232 states and 3253 transitions. [2020-10-15 03:21:53,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-15 03:21:53,480 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:21:53,480 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 03:21:53,480 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-15 03:21:53,481 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:21:53,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:21:53,481 INFO L82 PathProgramCache]: Analyzing trace with hash 1565463601, now seen corresponding path program 1 times [2020-10-15 03:21:53,481 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:21:53,481 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2102679168] [2020-10-15 03:21:53,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:21:53,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:21:53,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:21:53,597 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:21:53,598 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-15 03:21:53,598 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:21:53,598 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 93 [2020-10-15 03:21:53,598 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:21:53,598 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:21:53,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-15 03:21:53,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 80 [2020-10-15 03:21:53,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-15 03:21:53,599 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:21:53,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:21:53,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:21:53,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:21:53,746 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:21:53,746 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:21:53,746 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:21:53,746 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-15 03:21:53,746 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:21:53,746 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:21:53,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 03:21:53,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:21:53,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 03:21:53,747 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:21:53,754 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 03:21:53,754 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2102679168] [2020-10-15 03:21:53,754 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 03:21:53,754 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-15 03:21:53,754 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269623126] [2020-10-15 03:21:53,755 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-15 03:21:53,755 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:21:53,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-15 03:21:53,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-15 03:21:53,755 INFO L87 Difference]: Start difference. First operand 2232 states and 3253 transitions. Second operand 5 states. [2020-10-15 03:21:55,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:21:55,278 INFO L93 Difference]: Finished difference Result 3774 states and 5498 transitions. [2020-10-15 03:21:55,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-15 03:21:55,281 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 78 [2020-10-15 03:21:55,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:21:55,291 INFO L225 Difference]: With dead ends: 3774 [2020-10-15 03:21:55,291 INFO L226 Difference]: Without dead ends: 3772 [2020-10-15 03:21:55,292 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 [2020-10-15 03:21:55,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3772 states. [2020-10-15 03:21:56,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3772 to 2280. [2020-10-15 03:21:56,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2280 states. [2020-10-15 03:21:56,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2280 states to 2280 states and 3297 transitions. [2020-10-15 03:21:56,234 INFO L78 Accepts]: Start accepts. Automaton has 2280 states and 3297 transitions. Word has length 78 [2020-10-15 03:21:56,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:21:56,234 INFO L479 AbstractCegarLoop]: Abstraction has 2280 states and 3297 transitions. [2020-10-15 03:21:56,235 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-15 03:21:56,235 INFO L276 IsEmpty]: Start isEmpty. Operand 2280 states and 3297 transitions. [2020-10-15 03:21:56,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-15 03:21:56,235 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:21:56,235 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 03:21:56,235 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-15 03:21:56,236 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:21:56,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:21:56,236 INFO L82 PathProgramCache]: Analyzing trace with hash -591633424, now seen corresponding path program 1 times [2020-10-15 03:21:56,236 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:21:56,236 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1163182501] [2020-10-15 03:21:56,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:21:56,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:21:56,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:21:56,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:21:56,602 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:21:56,602 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-15 03:21:56,602 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-15 03:21:56,602 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 348 [2020-10-15 03:21:56,602 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:21:56,603 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:21:56,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-15 03:21:56,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-15 03:21:56,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-15 03:21:56,603 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:21:57,024 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-10-15 03:21:57,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:21:57,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:21:57,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:21:57,036 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:21:57,037 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:21:57,037 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:21:57,037 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-15 03:21:57,037 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:21:57,038 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:21:57,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 03:21:57,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:21:57,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 03:21:57,038 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:21:57,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 03:21:57,068 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1163182501] [2020-10-15 03:21:57,068 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 03:21:57,069 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-15 03:21:57,069 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373306595] [2020-10-15 03:21:57,069 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-15 03:21:57,070 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:21:57,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-15 03:21:57,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-15 03:21:57,070 INFO L87 Difference]: Start difference. First operand 2280 states and 3297 transitions. Second operand 10 states. [2020-10-15 03:21:57,235 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-15 03:21:59,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:21:59,350 INFO L93 Difference]: Finished difference Result 5530 states and 8039 transitions. [2020-10-15 03:21:59,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 03:21:59,350 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 78 [2020-10-15 03:21:59,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:21:59,356 INFO L225 Difference]: With dead ends: 5530 [2020-10-15 03:21:59,356 INFO L226 Difference]: Without dead ends: 3360 [2020-10-15 03:21:59,360 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2020-10-15 03:21:59,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3360 states. [2020-10-15 03:22:00,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3360 to 2275. [2020-10-15 03:22:00,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2275 states. [2020-10-15 03:22:00,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2275 states to 2275 states and 3288 transitions. [2020-10-15 03:22:00,085 INFO L78 Accepts]: Start accepts. Automaton has 2275 states and 3288 transitions. Word has length 78 [2020-10-15 03:22:00,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:22:00,085 INFO L479 AbstractCegarLoop]: Abstraction has 2275 states and 3288 transitions. [2020-10-15 03:22:00,085 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-15 03:22:00,085 INFO L276 IsEmpty]: Start isEmpty. Operand 2275 states and 3288 transitions. [2020-10-15 03:22:00,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-15 03:22:00,087 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:22:00,088 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 03:22:00,088 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-15 03:22:00,088 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:22:00,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:22:00,089 INFO L82 PathProgramCache]: Analyzing trace with hash -1232676612, now seen corresponding path program 1 times [2020-10-15 03:22:00,089 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:22:00,089 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1059775789] [2020-10-15 03:22:00,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:22:00,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:22:00,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:22:00,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:22:00,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:22:00,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:22:00,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:22:00,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:22:00,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:22:00,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:22:00,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:22:00,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:22:01,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:22:02,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:22:02,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:22:02,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:22:03,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:22:05,120 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:22:05,121 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-15 03:22:05,121 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-15 03:22:05,121 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-15 03:22:05,121 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:22:05,121 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:22:05,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-15 03:22:05,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-15 03:22:05,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-15 03:22:05,122 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:22:05,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:22:05,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:22:05,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:22:05,259 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:22:05,259 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:22:05,259 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:22:05,260 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-15 03:22:05,260 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:22:05,260 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:22:05,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 03:22:05,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:22:05,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 03:22:05,260 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:22:05,273 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 03:22:05,273 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1059775789] [2020-10-15 03:22:05,273 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 03:22:05,273 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-15 03:22:05,273 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507449338] [2020-10-15 03:22:05,274 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-15 03:22:05,274 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:22:05,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-15 03:22:05,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-15 03:22:05,274 INFO L87 Difference]: Start difference. First operand 2275 states and 3288 transitions. Second operand 6 states. [2020-10-15 03:22:05,422 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2020-10-15 03:22:06,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:22:06,795 INFO L93 Difference]: Finished difference Result 5265 states and 7629 transitions. [2020-10-15 03:22:06,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-15 03:22:06,796 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 101 [2020-10-15 03:22:06,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:22:06,799 INFO L225 Difference]: With dead ends: 5265 [2020-10-15 03:22:06,799 INFO L226 Difference]: Without dead ends: 3099 [2020-10-15 03:22:06,802 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-15 03:22:06,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3099 states. [2020-10-15 03:22:07,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3099 to 2635. [2020-10-15 03:22:07,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2635 states. [2020-10-15 03:22:07,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2635 states to 2635 states and 3816 transitions. [2020-10-15 03:22:07,622 INFO L78 Accepts]: Start accepts. Automaton has 2635 states and 3816 transitions. Word has length 101 [2020-10-15 03:22:07,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:22:07,622 INFO L479 AbstractCegarLoop]: Abstraction has 2635 states and 3816 transitions. [2020-10-15 03:22:07,622 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-15 03:22:07,623 INFO L276 IsEmpty]: Start isEmpty. Operand 2635 states and 3816 transitions. [2020-10-15 03:22:07,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-10-15 03:22:07,625 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:22:07,626 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 03:22:07,626 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-15 03:22:07,626 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:22:07,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:22:07,626 INFO L82 PathProgramCache]: Analyzing trace with hash 295152400, now seen corresponding path program 1 times [2020-10-15 03:22:07,627 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:22:07,627 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1660413772] [2020-10-15 03:22:07,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:22:07,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:22:07,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:22:07,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:22:07,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:22:07,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:22:08,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:22:08,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:22:08,805 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:22:08,805 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-15 03:22:08,805 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-15 03:22:08,806 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1153 [2020-10-15 03:22:08,806 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:22:08,806 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:22:08,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-15 03:22:08,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-15 03:22:08,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 91 [2020-10-15 03:22:08,807 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:22:08,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:22:08,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:22:08,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:22:08,999 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:22:08,999 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:22:09,000 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:22:09,000 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-15 03:22:09,000 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:22:09,000 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:22:09,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 03:22:09,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:22:09,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 03:22:09,001 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:22:09,019 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 03:22:09,019 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1660413772] [2020-10-15 03:22:09,019 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 03:22:09,019 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-15 03:22:09,019 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896352720] [2020-10-15 03:22:09,020 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-15 03:22:09,020 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:22:09,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-15 03:22:09,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-15 03:22:09,020 INFO L87 Difference]: Start difference. First operand 2635 states and 3816 transitions. Second operand 6 states. [2020-10-15 03:22:09,149 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-15 03:22:10,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:22:10,847 INFO L93 Difference]: Finished difference Result 5429 states and 7951 transitions. [2020-10-15 03:22:10,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-15 03:22:10,847 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 102 [2020-10-15 03:22:10,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:22:10,852 INFO L225 Difference]: With dead ends: 5429 [2020-10-15 03:22:10,852 INFO L226 Difference]: Without dead ends: 3883 [2020-10-15 03:22:10,855 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-15 03:22:10,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3883 states. [2020-10-15 03:22:12,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3883 to 3879. [2020-10-15 03:22:12,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3879 states. [2020-10-15 03:22:12,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3879 states to 3879 states and 5628 transitions. [2020-10-15 03:22:12,080 INFO L78 Accepts]: Start accepts. Automaton has 3879 states and 5628 transitions. Word has length 102 [2020-10-15 03:22:12,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:22:12,081 INFO L479 AbstractCegarLoop]: Abstraction has 3879 states and 5628 transitions. [2020-10-15 03:22:12,081 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-15 03:22:12,081 INFO L276 IsEmpty]: Start isEmpty. Operand 3879 states and 5628 transitions. [2020-10-15 03:22:12,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-10-15 03:22:12,083 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:22:12,084 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 03:22:12,084 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-15 03:22:12,084 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:22:12,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:22:12,084 INFO L82 PathProgramCache]: Analyzing trace with hash -197730635, now seen corresponding path program 1 times [2020-10-15 03:22:12,085 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:22:12,085 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [292724870] [2020-10-15 03:22:12,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:22:12,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:22:12,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:22:12,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:22:12,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:22:12,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:22:12,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:22:12,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:22:12,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:22:12,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:22:12,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:22:12,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:22:15,801 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:22:15,801 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-15 03:22:15,802 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-15 03:22:15,802 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3693 [2020-10-15 03:22:15,802 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:22:15,802 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:22:15,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-15 03:22:15,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-15 03:22:15,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 83 [2020-10-15 03:22:15,802 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:22:16,083 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-10-15 03:22:16,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:22:16,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:22:16,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:22:16,099 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:22:16,099 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:22:16,099 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:22:16,100 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-15 03:22:16,100 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:22:16,100 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:22:16,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 03:22:16,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:22:16,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-15 03:22:16,101 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:22:16,144 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 03:22:16,144 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [292724870] [2020-10-15 03:22:16,145 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 03:22:16,145 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-15 03:22:16,145 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365816822] [2020-10-15 03:22:16,146 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-15 03:22:16,146 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:22:16,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-15 03:22:16,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-15 03:22:16,146 INFO L87 Difference]: Start difference. First operand 3879 states and 5628 transitions. Second operand 8 states. [2020-10-15 03:22:16,285 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2020-10-15 03:22:20,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:22:20,297 INFO L93 Difference]: Finished difference Result 14179 states and 20538 transitions. [2020-10-15 03:22:20,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 03:22:20,298 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 103 [2020-10-15 03:22:20,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:22:20,308 INFO L225 Difference]: With dead ends: 14179 [2020-10-15 03:22:20,308 INFO L226 Difference]: Without dead ends: 10409 [2020-10-15 03:22:20,313 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2020-10-15 03:22:20,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10409 states. [2020-10-15 03:22:21,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10409 to 4703. [2020-10-15 03:22:21,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4703 states. [2020-10-15 03:22:21,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4703 states to 4703 states and 6680 transitions. [2020-10-15 03:22:21,813 INFO L78 Accepts]: Start accepts. Automaton has 4703 states and 6680 transitions. Word has length 103 [2020-10-15 03:22:21,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:22:21,813 INFO L479 AbstractCegarLoop]: Abstraction has 4703 states and 6680 transitions. [2020-10-15 03:22:21,813 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-15 03:22:21,813 INFO L276 IsEmpty]: Start isEmpty. Operand 4703 states and 6680 transitions. [2020-10-15 03:22:21,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-10-15 03:22:21,815 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:22:21,816 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 03:22:21,816 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-15 03:22:21,816 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:22:21,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:22:21,816 INFO L82 PathProgramCache]: Analyzing trace with hash -509423956, now seen corresponding path program 1 times [2020-10-15 03:22:21,817 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:22:21,817 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2064278889] [2020-10-15 03:22:21,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:22:21,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:22:21,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:22:21,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:22:21,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:22:21,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:22:22,383 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:22:22,383 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-15 03:22:22,383 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-15 03:22:22,383 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 548 [2020-10-15 03:22:22,383 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:22:22,383 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:22:22,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 03:22:22,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 75 [2020-10-15 03:22:22,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-15 03:22:22,384 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:22:22,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:22:22,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:22:22,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:22:22,532 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:22:22,532 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:22:22,532 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:22:22,533 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-15 03:22:22,533 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:22:22,533 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:22:22,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 03:22:22,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:22:22,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 03:22:22,534 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 03:22:22,547 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 03:22:22,548 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2064278889] [2020-10-15 03:22:22,548 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 03:22:22,548 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-15 03:22:22,548 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730561930] [2020-10-15 03:22:22,548 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-15 03:22:22,549 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:22:22,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-15 03:22:22,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-15 03:22:22,549 INFO L87 Difference]: Start difference. First operand 4703 states and 6680 transitions. Second operand 4 states. [2020-10-15 03:22:22,698 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 123 [2020-10-15 03:22:25,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:22:25,313 INFO L93 Difference]: Finished difference Result 11623 states and 16490 transitions. [2020-10-15 03:22:25,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-15 03:22:25,314 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 103 [2020-10-15 03:22:25,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:22:25,321 INFO L225 Difference]: With dead ends: 11623 [2020-10-15 03:22:25,321 INFO L226 Difference]: Without dead ends: 7029 [2020-10-15 03:22:25,326 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-15 03:22:25,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7029 states. [2020-10-15 03:22:27,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7029 to 6775. [2020-10-15 03:22:27,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6775 states. [2020-10-15 03:22:27,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6775 states to 6775 states and 9592 transitions. [2020-10-15 03:22:27,504 INFO L78 Accepts]: Start accepts. Automaton has 6775 states and 9592 transitions. Word has length 103 [2020-10-15 03:22:27,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:22:27,504 INFO L479 AbstractCegarLoop]: Abstraction has 6775 states and 9592 transitions. [2020-10-15 03:22:27,504 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-15 03:22:27,505 INFO L276 IsEmpty]: Start isEmpty. Operand 6775 states and 9592 transitions. [2020-10-15 03:22:27,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-10-15 03:22:27,506 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:22:27,506 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 03:22:27,506 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-15 03:22:27,507 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:22:27,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:22:27,507 INFO L82 PathProgramCache]: Analyzing trace with hash -646356540, now seen corresponding path program 1 times [2020-10-15 03:22:27,507 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:22:27,507 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2074515544] [2020-10-15 03:22:27,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:22:27,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:22:27,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:22:27,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:22:27,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:22:27,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:22:27,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:22:27,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:22:27,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:22:27,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:22:28,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:22:28,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:22:28,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:22:31,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:22:31,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:22:31,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:22:32,529 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:22:32,530 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-15 03:22:32,530 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-15 03:22:32,530 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-15 03:22:32,530 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:22:32,530 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:22:32,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-15 03:22:32,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-15 03:22:32,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 91 [2020-10-15 03:22:32,531 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-15 03:22:32,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:22:32,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:22:32,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:22:32,780 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:22:32,780 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:22:32,780 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:22:32,781 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-15 03:22:32,781 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:22:32,781 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:22:32,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 03:22:32,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:22:32,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-15 03:22:32,782 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:22:32,826 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 03:22:32,826 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2074515544] [2020-10-15 03:22:32,827 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 03:22:32,827 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-15 03:22:32,827 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104007323] [2020-10-15 03:22:32,827 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-15 03:22:32,827 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:22:32,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-15 03:22:32,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-15 03:22:32,828 INFO L87 Difference]: Start difference. First operand 6775 states and 9592 transitions. Second operand 8 states. [2020-10-15 03:22:32,969 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 122 [2020-10-15 03:22:43,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:22:43,215 INFO L93 Difference]: Finished difference Result 34951 states and 48996 transitions. [2020-10-15 03:22:43,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-15 03:22:43,216 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 104 [2020-10-15 03:22:43,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:22:43,243 INFO L225 Difference]: With dead ends: 34951 [2020-10-15 03:22:43,244 INFO L226 Difference]: Without dead ends: 28285 [2020-10-15 03:22:43,255 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2020-10-15 03:22:43,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28285 states. [2020-10-15 03:22:47,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28285 to 14111. [2020-10-15 03:22:47,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14111 states. [2020-10-15 03:22:47,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14111 states to 14111 states and 19736 transitions. [2020-10-15 03:22:47,733 INFO L78 Accepts]: Start accepts. Automaton has 14111 states and 19736 transitions. Word has length 104 [2020-10-15 03:22:47,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:22:47,733 INFO L479 AbstractCegarLoop]: Abstraction has 14111 states and 19736 transitions. [2020-10-15 03:22:47,733 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-15 03:22:47,733 INFO L276 IsEmpty]: Start isEmpty. Operand 14111 states and 19736 transitions. [2020-10-15 03:22:47,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-10-15 03:22:47,735 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:22:47,735 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 03:22:47,735 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-15 03:22:47,735 INFO L427 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:22:47,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:22:47,735 INFO L82 PathProgramCache]: Analyzing trace with hash 1712900094, now seen corresponding path program 1 times [2020-10-15 03:22:47,736 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:22:47,736 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1347404763] [2020-10-15 03:22:47,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:22:47,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:22:47,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:22:47,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:22:47,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:22:47,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:22:47,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:22:47,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:22:47,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:22:48,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:22:48,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:22:48,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:22:48,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:22:49,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:22:49,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:22:52,809 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:22:52,809 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-15 03:22:52,809 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-15 03:22:52,809 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5055 [2020-10-15 03:22:52,809 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:22:52,809 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:22:52,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-15 03:22:52,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-15 03:22:52,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-10-15 03:22:52,810 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:22:52,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:22:52,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:22:52,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:22:52,974 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:22:52,974 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:22:52,974 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:22:52,974 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-15 03:22:52,974 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:22:52,974 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:22:52,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-15 03:22:52,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:22:52,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-15 03:22:52,975 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:22:52,988 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 03:22:52,988 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1347404763] [2020-10-15 03:22:52,988 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-15 03:22:52,988 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-15 03:22:52,989 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200782133] [2020-10-15 03:22:52,989 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-15 03:22:52,989 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:22:52,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-15 03:22:52,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-15 03:22:52,989 INFO L87 Difference]: Start difference. First operand 14111 states and 19736 transitions. Second operand 8 states. [2020-10-15 03:22:53,138 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-15 03:23:17,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-15 03:23:17,274 INFO L93 Difference]: Finished difference Result 83089 states and 116554 transitions. [2020-10-15 03:23:17,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-15 03:23:17,275 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 104 [2020-10-15 03:23:17,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-15 03:23:17,351 INFO L225 Difference]: With dead ends: 83089 [2020-10-15 03:23:17,351 INFO L226 Difference]: Without dead ends: 69087 [2020-10-15 03:23:17,376 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=146, Invalid=406, Unknown=0, NotChecked=0, Total=552 [2020-10-15 03:23:17,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69087 states. [2020-10-15 03:23:25,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69087 to 25887. [2020-10-15 03:23:25,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25887 states. [2020-10-15 03:23:25,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25887 states to 25887 states and 36634 transitions. [2020-10-15 03:23:25,681 INFO L78 Accepts]: Start accepts. Automaton has 25887 states and 36634 transitions. Word has length 104 [2020-10-15 03:23:25,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-15 03:23:25,681 INFO L479 AbstractCegarLoop]: Abstraction has 25887 states and 36634 transitions. [2020-10-15 03:23:25,681 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-15 03:23:25,681 INFO L276 IsEmpty]: Start isEmpty. Operand 25887 states and 36634 transitions. [2020-10-15 03:23:25,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-10-15 03:23:25,688 INFO L414 BasicCegarLoop]: Found error trace [2020-10-15 03:23:25,688 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-15 03:23:25,688 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-15 03:23:25,688 INFO L427 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-15 03:23:25,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-15 03:23:25,689 INFO L82 PathProgramCache]: Analyzing trace with hash -1793120421, now seen corresponding path program 1 times [2020-10-15 03:23:25,689 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-15 03:23:25,689 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [636736315] [2020-10-15 03:23:25,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-15 03:23:25,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:23:25,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:23:25,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:23:25,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:23:25,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:23:25,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:23:26,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:23:26,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:23:26,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:23:26,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:23:26,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:23:26,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:23:26,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:23:26,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:23:27,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:23:30,722 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:23:30,722 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 133 [2020-10-15 03:23:30,722 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-15 03:23:30,722 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-15 03:23:30,723 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:23:30,723 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:23:30,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-15 03:23:30,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-15 03:23:30,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 106 [2020-10-15 03:23:30,723 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:23:31,073 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-10-15 03:23:31,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-15 03:23:31,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-15 03:23:31,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-15 03:23:31,089 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-15 03:23:31,089 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-15 03:23:31,089 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-15 03:23:31,089 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-15 03:23:31,089 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-15 03:23:31,090 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.2 [2020-10-15 03:23:31,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-15 03:23:31,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-15 03:23:31,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-15 03:23:31,090 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-15 03:23:31,129 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 24 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-15 03:23:31,129 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [636736315] [2020-10-15 03:23:31,129 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-15 03:23:31,130 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-15 03:23:31,130 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889799136] [2020-10-15 03:23:31,130 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-15 03:23:31,130 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-15 03:23:31,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-15 03:23:31,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2020-10-15 03:23:31,131 INFO L87 Difference]: Start difference. First operand 25887 states and 36634 transitions. Second operand 13 states. [2020-10-15 03:23:31,573 WARN L193 SmtUtils]: Spent 326.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 135