/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=NARROWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.5.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 14:49:11,267 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 14:49:11,270 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 14:49:11,308 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 14:49:11,308 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 14:49:11,316 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 14:49:11,318 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 14:49:11,321 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 14:49:11,324 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 14:49:11,326 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 14:49:11,327 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 14:49:11,328 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 14:49:11,328 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 14:49:11,330 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 14:49:11,333 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 14:49:11,335 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 14:49:11,336 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 14:49:11,337 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 14:49:11,338 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 14:49:11,346 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 14:49:11,348 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 14:49:11,349 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 14:49:11,350 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 14:49:11,351 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 14:49:11,364 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 14:49:11,364 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 14:49:11,365 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 14:49:11,365 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 14:49:11,366 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 14:49:11,366 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 14:49:11,367 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 14:49:11,370 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 14:49:11,371 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 14:49:11,372 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 14:49:11,375 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 14:49:11,376 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 14:49:11,376 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 14:49:11,376 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 14:49:11,377 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 14:49:11,377 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 14:49:11,380 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 14:49:11,381 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-13 14:49:11,417 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 14:49:11,417 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 14:49:11,419 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 14:49:11,419 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 14:49:11,419 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 14:49:11,419 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 14:49:11,420 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 14:49:11,420 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 14:49:11,420 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 14:49:11,421 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 14:49:11,422 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 14:49:11,422 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 14:49:11,422 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 14:49:11,423 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 14:49:11,424 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 14:49:11,424 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 14:49:11,424 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 14:49:11,424 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 14:49:11,424 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 14:49:11,425 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 14:49:11,425 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 14:49:11,425 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 14:49:11,425 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 14:49:11,426 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 14:49:11,426 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 14:49:11,426 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 14:49:11,426 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 14:49:11,426 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 14:49:11,426 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 14:49:11,427 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=NARROWEST;log-additional-information=true;unknown-allowed=true; [2020-10-13 14:49:11,681 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 14:49:11,693 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 14:49:11,697 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 14:49:11,699 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 14:49:11,699 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 14:49:11,700 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.5.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c [2020-10-13 14:49:11,757 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6731df0dd/282dd908e1524df7a4bf586725f6534c/FLAG2511d0a04 [2020-10-13 14:49:12,163 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 14:49:12,164 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.5.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c [2020-10-13 14:49:12,174 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6731df0dd/282dd908e1524df7a4bf586725f6534c/FLAG2511d0a04 [2020-10-13 14:49:12,503 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6731df0dd/282dd908e1524df7a4bf586725f6534c [2020-10-13 14:49:12,510 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 14:49:12,512 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 14:49:12,513 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 14:49:12,513 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 14:49:12,516 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 14:49:12,517 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 02:49:12" (1/1) ... [2020-10-13 14:49:12,520 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@60cc7f1c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:49:12, skipping insertion in model container [2020-10-13 14:49:12,520 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 02:49:12" (1/1) ... [2020-10-13 14:49:12,529 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 14:49:12,570 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 14:49:12,827 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 14:49:12,839 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 14:49:13,027 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 14:49:13,049 INFO L208 MainTranslator]: Completed translation [2020-10-13 14:49:13,050 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:49:13 WrapperNode [2020-10-13 14:49:13,050 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 14:49:13,051 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 14:49:13,051 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 14:49:13,051 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 14:49:13,065 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:49:13" (1/1) ... [2020-10-13 14:49:13,066 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:49:13" (1/1) ... [2020-10-13 14:49:13,082 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:49:13" (1/1) ... [2020-10-13 14:49:13,082 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:49:13" (1/1) ... [2020-10-13 14:49:13,096 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:49:13" (1/1) ... [2020-10-13 14:49:13,106 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:49:13" (1/1) ... [2020-10-13 14:49:13,109 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:49:13" (1/1) ... [2020-10-13 14:49:13,114 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 14:49:13,115 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 14:49:13,115 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 14:49:13,115 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 14:49:13,116 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:49:13" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 14:49:13,187 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 14:49:13,187 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 14:49:13,187 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-13 14:49:13,187 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 14:49:13,188 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 14:49:13,189 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-13 14:49:13,189 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-13 14:49:13,190 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-13 14:49:13,191 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-13 14:49:13,191 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-13 14:49:13,191 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-13 14:49:13,192 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-13 14:49:13,192 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-13 14:49:13,192 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-13 14:49:13,192 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-13 14:49:13,194 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-13 14:49:13,194 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-10-13 14:49:13,194 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-13 14:49:13,194 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-13 14:49:13,195 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 14:49:13,195 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 14:49:13,195 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 14:49:13,888 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 14:49:13,889 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-13 14:49:13,894 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 02:49:13 BoogieIcfgContainer [2020-10-13 14:49:13,894 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 14:49:13,895 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 14:49:13,896 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 14:49:13,899 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 14:49:13,899 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 02:49:12" (1/3) ... [2020-10-13 14:49:13,900 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58def347 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 02:49:13, skipping insertion in model container [2020-10-13 14:49:13,900 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:49:13" (2/3) ... [2020-10-13 14:49:13,900 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58def347 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 02:49:13, skipping insertion in model container [2020-10-13 14:49:13,901 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 02:49:13" (3/3) ... [2020-10-13 14:49:13,902 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.5.ufo.BOUNDED-10.pals.c.v+cfa-reducer.c [2020-10-13 14:49:13,913 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 14:49:13,920 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 14:49:13,934 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 14:49:13,960 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 14:49:13,960 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 14:49:13,960 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 14:49:13,961 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 14:49:13,961 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 14:49:13,961 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 14:49:13,961 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 14:49:13,961 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 14:49:13,983 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states. [2020-10-13 14:49:13,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-13 14:49:14,000 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:49:14,001 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:49:14,002 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:49:14,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:49:14,008 INFO L82 PathProgramCache]: Analyzing trace with hash -153114197, now seen corresponding path program 1 times [2020-10-13 14:49:14,017 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:49:14,017 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1046383706] [2020-10-13 14:49:14,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:49:14,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:49:14,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:49:14,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:49:14,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:49:15,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:49:15,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:49:16,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:49:19,395 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:49:19,396 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-13 14:49:19,396 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 14:49:19,397 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 14:49:19,401 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:49:19,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:49:19,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-13 14:49:19,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-13 14:49:19,404 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-13 14:49:19,761 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-13 14:49:19,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:49:19,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:49:19,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:49:19,789 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:49:19,790 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:49:19,790 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:49:19,790 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-13 14:49:19,791 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:49:19,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:49:19,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:49:19,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:49:19,792 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:49:19,818 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:49:19,819 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1046383706] [2020-10-13 14:49:19,821 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:49:19,821 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:49:19,822 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085649879] [2020-10-13 14:49:19,829 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:49:19,830 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:49:19,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:49:19,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:49:19,847 INFO L87 Difference]: Start difference. First operand 141 states. Second operand 4 states. [2020-10-13 14:49:20,122 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2020-10-13 14:49:20,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:49:20,937 INFO L93 Difference]: Finished difference Result 329 states and 529 transitions. [2020-10-13 14:49:20,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:49:20,939 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 64 [2020-10-13 14:49:20,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:49:20,956 INFO L225 Difference]: With dead ends: 329 [2020-10-13 14:49:20,956 INFO L226 Difference]: Without dead ends: 219 [2020-10-13 14:49:20,961 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:49:20,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-10-13 14:49:21,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 217. [2020-10-13 14:49:21,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2020-10-13 14:49:21,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 323 transitions. [2020-10-13 14:49:21,034 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 323 transitions. Word has length 64 [2020-10-13 14:49:21,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:49:21,034 INFO L479 AbstractCegarLoop]: Abstraction has 217 states and 323 transitions. [2020-10-13 14:49:21,035 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:49:21,035 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 323 transitions. [2020-10-13 14:49:21,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-13 14:49:21,038 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:49:21,038 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] [2020-10-13 14:49:21,039 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 14:49:21,039 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:49:21,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:49:21,039 INFO L82 PathProgramCache]: Analyzing trace with hash 1630585895, now seen corresponding path program 1 times [2020-10-13 14:49:21,039 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:49:21,040 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [535047735] [2020-10-13 14:49:21,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:49:21,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:49:21,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:49:21,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:49:21,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:49:21,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:49:21,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:49:23,991 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:49:23,992 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-13 14:49:23,992 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 14:49:23,992 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2919 [2020-10-13 14:49:23,992 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:49:23,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:49:23,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-13 14:49:23,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-13 14:49:23,994 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:49:24,221 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-13 14:49:24,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:49:24,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:49:24,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:49:24,242 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:49:24,251 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:49:24,252 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:49:24,252 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-13 14:49:24,252 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:49:24,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:49:24,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:49:24,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:49:24,253 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:49:24,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:49:24,307 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [535047735] [2020-10-13 14:49:24,307 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:49:24,308 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:49:24,308 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905450813] [2020-10-13 14:49:24,310 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:49:24,311 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:49:24,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:49:24,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:49:24,311 INFO L87 Difference]: Start difference. First operand 217 states and 323 transitions. Second operand 4 states. [2020-10-13 14:49:24,485 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2020-10-13 14:49:25,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:49:25,268 INFO L93 Difference]: Finished difference Result 541 states and 839 transitions. [2020-10-13 14:49:25,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:49:25,269 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 65 [2020-10-13 14:49:25,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:49:25,272 INFO L225 Difference]: With dead ends: 541 [2020-10-13 14:49:25,273 INFO L226 Difference]: Without dead ends: 363 [2020-10-13 14:49:25,275 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:49:25,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2020-10-13 14:49:25,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 361. [2020-10-13 14:49:25,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 361 states. [2020-10-13 14:49:25,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 552 transitions. [2020-10-13 14:49:25,317 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 552 transitions. Word has length 65 [2020-10-13 14:49:25,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:49:25,318 INFO L479 AbstractCegarLoop]: Abstraction has 361 states and 552 transitions. [2020-10-13 14:49:25,318 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:49:25,318 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 552 transitions. [2020-10-13 14:49:25,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-13 14:49:25,323 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:49:25,323 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:49:25,323 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 14:49:25,324 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:49:25,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:49:25,325 INFO L82 PathProgramCache]: Analyzing trace with hash -1429011680, now seen corresponding path program 1 times [2020-10-13 14:49:25,325 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:49:25,325 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1674459109] [2020-10-13 14:49:25,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:49:25,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:49:25,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:49:25,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:49:25,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:49:25,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:49:26,626 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:49:26,627 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-13 14:49:26,627 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 14:49:26,627 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1271 [2020-10-13 14:49:26,628 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:49:26,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:49:26,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-13 14:49:26,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-13 14:49:26,629 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:49:26,831 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-13 14:49:26,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:49:26,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:49:26,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:49:26,851 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:49:26,851 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:49:26,851 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:49:26,852 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-13 14:49:26,852 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:49:26,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:49:26,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:49:26,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:49:26,853 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:49:26,896 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:49:26,897 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1674459109] [2020-10-13 14:49:26,897 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:49:26,898 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:49:26,899 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84407571] [2020-10-13 14:49:26,899 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:49:26,900 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:49:26,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:49:26,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:49:26,900 INFO L87 Difference]: Start difference. First operand 361 states and 552 transitions. Second operand 4 states. [2020-10-13 14:49:27,078 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2020-10-13 14:49:27,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:49:27,761 INFO L93 Difference]: Finished difference Result 941 states and 1474 transitions. [2020-10-13 14:49:27,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:49:27,762 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 66 [2020-10-13 14:49:27,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:49:27,768 INFO L225 Difference]: With dead ends: 941 [2020-10-13 14:49:27,768 INFO L226 Difference]: Without dead ends: 619 [2020-10-13 14:49:27,771 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:49:27,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2020-10-13 14:49:27,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 617. [2020-10-13 14:49:27,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 617 states. [2020-10-13 14:49:27,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 617 states to 617 states and 956 transitions. [2020-10-13 14:49:27,823 INFO L78 Accepts]: Start accepts. Automaton has 617 states and 956 transitions. Word has length 66 [2020-10-13 14:49:27,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:49:27,824 INFO L479 AbstractCegarLoop]: Abstraction has 617 states and 956 transitions. [2020-10-13 14:49:27,824 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:49:27,825 INFO L276 IsEmpty]: Start isEmpty. Operand 617 states and 956 transitions. [2020-10-13 14:49:27,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-13 14:49:27,827 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:49:27,827 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:49:27,827 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 14:49:27,828 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:49:27,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:49:27,828 INFO L82 PathProgramCache]: Analyzing trace with hash 463138524, now seen corresponding path program 1 times [2020-10-13 14:49:27,828 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:49:27,829 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [354146688] [2020-10-13 14:49:27,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:49:27,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:49:27,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:49:27,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:49:28,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:49:28,544 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:49:28,545 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-13 14:49:28,545 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 14:49:28,545 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 681 [2020-10-13 14:49:28,545 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:49:28,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:49:28,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-13 14:49:28,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-13 14:49:28,546 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:49:28,711 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-13 14:49:28,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:49:28,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:49:28,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:49:28,727 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:49:28,728 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:49:28,728 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:49:28,728 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-13 14:49:28,728 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:49:28,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:49:28,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:49:28,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:49:28,729 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:49:28,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:49:28,743 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [354146688] [2020-10-13 14:49:28,744 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:49:28,744 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:49:28,744 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511293347] [2020-10-13 14:49:28,745 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:49:28,745 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:49:28,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:49:28,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:49:28,745 INFO L87 Difference]: Start difference. First operand 617 states and 956 transitions. Second operand 4 states. [2020-10-13 14:49:28,904 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2020-10-13 14:49:29,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:49:29,475 INFO L93 Difference]: Finished difference Result 1645 states and 2582 transitions. [2020-10-13 14:49:29,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:49:29,476 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 67 [2020-10-13 14:49:29,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:49:29,483 INFO L225 Difference]: With dead ends: 1645 [2020-10-13 14:49:29,483 INFO L226 Difference]: Without dead ends: 1067 [2020-10-13 14:49:29,485 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:49:29,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1067 states. [2020-10-13 14:49:29,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1067 to 1065. [2020-10-13 14:49:29,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1065 states. [2020-10-13 14:49:29,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1065 states to 1065 states and 1656 transitions. [2020-10-13 14:49:29,536 INFO L78 Accepts]: Start accepts. Automaton has 1065 states and 1656 transitions. Word has length 67 [2020-10-13 14:49:29,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:49:29,538 INFO L479 AbstractCegarLoop]: Abstraction has 1065 states and 1656 transitions. [2020-10-13 14:49:29,538 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:49:29,538 INFO L276 IsEmpty]: Start isEmpty. Operand 1065 states and 1656 transitions. [2020-10-13 14:49:29,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-13 14:49:29,539 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:49:29,540 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:49:29,540 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 14:49:29,540 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:49:29,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:49:29,541 INFO L82 PathProgramCache]: Analyzing trace with hash 2124243582, now seen corresponding path program 1 times [2020-10-13 14:49:29,541 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:49:29,541 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1311591693] [2020-10-13 14:49:29,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:49:29,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:49:29,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:49:29,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:49:29,892 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:49:29,892 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-13 14:49:29,892 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 14:49:29,892 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 329 [2020-10-13 14:49:29,893 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:49:29,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:49:29,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-13 14:49:29,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-13 14:49:29,893 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:49:30,051 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-13 14:49:30,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:49:30,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:49:30,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:49:30,063 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:49:30,064 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:49:30,064 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:49:30,064 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 14:49:30,064 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:49:30,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:49:30,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:49:30,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:49:30,065 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:49:30,078 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:49:30,078 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1311591693] [2020-10-13 14:49:30,078 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:49:30,079 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:49:30,079 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799692533] [2020-10-13 14:49:30,079 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:49:30,080 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:49:30,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:49:30,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:49:30,080 INFO L87 Difference]: Start difference. First operand 1065 states and 1656 transitions. Second operand 4 states. [2020-10-13 14:49:30,232 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2020-10-13 14:49:30,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:49:30,914 INFO L93 Difference]: Finished difference Result 2861 states and 4474 transitions. [2020-10-13 14:49:30,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:49:30,915 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 68 [2020-10-13 14:49:30,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:49:30,924 INFO L225 Difference]: With dead ends: 2861 [2020-10-13 14:49:30,924 INFO L226 Difference]: Without dead ends: 1835 [2020-10-13 14:49:30,926 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:49:30,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1835 states. [2020-10-13 14:49:31,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1835 to 1833. [2020-10-13 14:49:31,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1833 states. [2020-10-13 14:49:31,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1833 states to 1833 states and 2840 transitions. [2020-10-13 14:49:31,011 INFO L78 Accepts]: Start accepts. Automaton has 1833 states and 2840 transitions. Word has length 68 [2020-10-13 14:49:31,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:49:31,012 INFO L479 AbstractCegarLoop]: Abstraction has 1833 states and 2840 transitions. [2020-10-13 14:49:31,012 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:49:31,012 INFO L276 IsEmpty]: Start isEmpty. Operand 1833 states and 2840 transitions. [2020-10-13 14:49:31,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-13 14:49:31,013 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:49:31,013 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] [2020-10-13 14:49:31,013 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 14:49:31,013 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:49:31,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:49:31,014 INFO L82 PathProgramCache]: Analyzing trace with hash 1407566693, now seen corresponding path program 1 times [2020-10-13 14:49:31,014 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:49:31,014 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1111252640] [2020-10-13 14:49:31,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:49:31,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:49:31,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:49:31,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:49:31,954 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:49:31,955 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-13 14:49:31,955 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 14:49:31,955 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 920 [2020-10-13 14:49:31,956 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:49:31,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 14:49:31,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 14:49:31,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-13 14:49:31,956 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:49:32,300 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-13 14:49:32,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:49:32,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:49:32,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:49:32,318 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:49:32,318 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:49:32,318 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:49:32,319 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-13 14:49:32,319 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:49:32,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:49:32,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:49:32,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:49:32,320 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:49:32,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:49:32,383 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1111252640] [2020-10-13 14:49:32,389 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:49:32,390 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-13 14:49:32,390 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004890224] [2020-10-13 14:49:32,391 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 14:49:32,392 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:49:32,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 14:49:32,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 14:49:32,393 INFO L87 Difference]: Start difference. First operand 1833 states and 2840 transitions. Second operand 8 states. [2020-10-13 14:49:34,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:49:34,527 INFO L93 Difference]: Finished difference Result 9443 states and 14605 transitions. [2020-10-13 14:49:34,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 14:49:34,528 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 69 [2020-10-13 14:49:34,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:49:34,568 INFO L225 Difference]: With dead ends: 9443 [2020-10-13 14:49:34,568 INFO L226 Difference]: Without dead ends: 7649 [2020-10-13 14:49:34,577 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 [2020-10-13 14:49:34,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7649 states. [2020-10-13 14:49:34,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7649 to 7641. [2020-10-13 14:49:34,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7641 states. [2020-10-13 14:49:35,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7641 states to 7641 states and 11768 transitions. [2020-10-13 14:49:35,011 INFO L78 Accepts]: Start accepts. Automaton has 7641 states and 11768 transitions. Word has length 69 [2020-10-13 14:49:35,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:49:35,013 INFO L479 AbstractCegarLoop]: Abstraction has 7641 states and 11768 transitions. [2020-10-13 14:49:35,013 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 14:49:35,013 INFO L276 IsEmpty]: Start isEmpty. Operand 7641 states and 11768 transitions. [2020-10-13 14:49:35,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-13 14:49:35,014 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:49:35,014 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:49:35,015 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 14:49:35,015 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:49:35,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:49:35,015 INFO L82 PathProgramCache]: Analyzing trace with hash 1800258076, now seen corresponding path program 1 times [2020-10-13 14:49:35,016 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:49:35,018 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [160571337] [2020-10-13 14:49:35,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:49:35,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:49:35,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:49:35,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:49:35,800 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:49:35,800 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-13 14:49:35,801 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 14:49:35,801 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 735 [2020-10-13 14:49:35,801 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:49:35,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 14:49:35,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 14:49:35,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-13 14:49:35,802 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:49:36,115 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-13 14:49:36,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:49:36,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:49:36,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:49:36,152 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:49:36,152 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:49:36,152 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:49:36,153 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-13 14:49:36,153 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:49:36,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:49:36,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:49:36,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 14:49:36,154 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:49:36,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:49:36,173 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [160571337] [2020-10-13 14:49:36,173 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:49:36,174 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:49:36,174 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325595873] [2020-10-13 14:49:36,174 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 14:49:36,174 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:49:36,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 14:49:36,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:49:36,175 INFO L87 Difference]: Start difference. First operand 7641 states and 11768 transitions. Second operand 6 states. [2020-10-13 14:49:36,371 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-13 14:49:37,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:49:37,879 INFO L93 Difference]: Finished difference Result 22701 states and 34938 transitions. [2020-10-13 14:49:37,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 14:49:37,880 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 71 [2020-10-13 14:49:37,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:49:37,949 INFO L225 Difference]: With dead ends: 22701 [2020-10-13 14:49:37,949 INFO L226 Difference]: Without dead ends: 15099 [2020-10-13 14:49:37,965 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-13 14:49:37,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15099 states. [2020-10-13 14:49:39,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15099 to 15097. [2020-10-13 14:49:39,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15097 states. [2020-10-13 14:49:39,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15097 states to 15097 states and 23064 transitions. [2020-10-13 14:49:39,153 INFO L78 Accepts]: Start accepts. Automaton has 15097 states and 23064 transitions. Word has length 71 [2020-10-13 14:49:39,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:49:39,153 INFO L479 AbstractCegarLoop]: Abstraction has 15097 states and 23064 transitions. [2020-10-13 14:49:39,153 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 14:49:39,154 INFO L276 IsEmpty]: Start isEmpty. Operand 15097 states and 23064 transitions. [2020-10-13 14:49:39,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-13 14:49:39,163 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:49:39,163 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:49:39,164 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 14:49:39,164 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:49:39,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:49:39,165 INFO L82 PathProgramCache]: Analyzing trace with hash -877204329, now seen corresponding path program 1 times [2020-10-13 14:49:39,165 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:49:39,165 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1230147258] [2020-10-13 14:49:39,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:49:39,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:49:39,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:49:39,418 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:49:39,418 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-13 14:49:39,418 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:49:39,418 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 221 [2020-10-13 14:49:39,419 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:49:39,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 14:49:39,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 14:49:39,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-13 14:49:39,419 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:49:39,607 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-13 14:49:39,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:49:39,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:49:39,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:49:39,620 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:49:39,621 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:49:39,621 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:49:39,621 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-13 14:49:39,621 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:49:39,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:49:39,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:49:39,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:49:39,622 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:49:39,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:49:39,645 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1230147258] [2020-10-13 14:49:39,645 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:49:39,645 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-13 14:49:39,645 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049987105] [2020-10-13 14:49:39,646 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 14:49:39,646 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:49:39,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 14:49:39,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-13 14:49:39,647 INFO L87 Difference]: Start difference. First operand 15097 states and 23064 transitions. Second operand 8 states. [2020-10-13 14:49:39,909 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification that was a NOOP. DAG size: 155 [2020-10-13 14:49:43,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:49:43,075 INFO L93 Difference]: Finished difference Result 77221 states and 118142 transitions. [2020-10-13 14:49:43,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 14:49:43,075 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 71 [2020-10-13 14:49:43,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:49:43,232 INFO L225 Difference]: With dead ends: 77221 [2020-10-13 14:49:43,233 INFO L226 Difference]: Without dead ends: 62163 [2020-10-13 14:49:43,287 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2020-10-13 14:49:43,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62163 states. [2020-10-13 14:49:46,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62163 to 30153. [2020-10-13 14:49:46,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30153 states. [2020-10-13 14:49:46,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30153 states to 30153 states and 45448 transitions. [2020-10-13 14:49:46,214 INFO L78 Accepts]: Start accepts. Automaton has 30153 states and 45448 transitions. Word has length 71 [2020-10-13 14:49:46,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:49:46,215 INFO L479 AbstractCegarLoop]: Abstraction has 30153 states and 45448 transitions. [2020-10-13 14:49:46,215 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 14:49:46,215 INFO L276 IsEmpty]: Start isEmpty. Operand 30153 states and 45448 transitions. [2020-10-13 14:49:46,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-13 14:49:46,216 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:49:46,216 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:49:46,217 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 14:49:46,217 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:49:46,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:49:46,217 INFO L82 PathProgramCache]: Analyzing trace with hash -1442063136, now seen corresponding path program 1 times [2020-10-13 14:49:46,217 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:49:46,217 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1531484978] [2020-10-13 14:49:46,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:49:46,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:49:46,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:49:46,365 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:49:46,366 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-13 14:49:46,366 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:49:46,366 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 128 [2020-10-13 14:49:46,366 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:49:46,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 14:49:46,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 74 [2020-10-13 14:49:46,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-13 14:49:46,367 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:49:46,533 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-13 14:49:46,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:49:46,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:49:46,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:49:46,545 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:49:46,545 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:49:46,545 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:49:46,546 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 14:49:46,546 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:49:46,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:49:46,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:49:46,546 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:49:46,546 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:49:46,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:49:46,557 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1531484978] [2020-10-13 14:49:46,557 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:49:46,557 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:49:46,558 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103033747] [2020-10-13 14:49:46,558 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 14:49:46,558 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:49:46,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 14:49:46,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:49:46,559 INFO L87 Difference]: Start difference. First operand 30153 states and 45448 transitions. Second operand 5 states. [2020-10-13 14:49:49,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:49:49,756 INFO L93 Difference]: Finished difference Result 61547 states and 92137 transitions. [2020-10-13 14:49:49,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 14:49:49,757 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 72 [2020-10-13 14:49:49,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:49:49,923 INFO L225 Difference]: With dead ends: 61547 [2020-10-13 14:49:49,924 INFO L226 Difference]: Without dead ends: 61545 [2020-10-13 14:49:49,945 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:49:50,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61545 states. [2020-10-13 14:49:52,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61545 to 31433. [2020-10-13 14:49:52,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31433 states. [2020-10-13 14:49:52,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31433 states to 31433 states and 46728 transitions. [2020-10-13 14:49:52,065 INFO L78 Accepts]: Start accepts. Automaton has 31433 states and 46728 transitions. Word has length 72 [2020-10-13 14:49:52,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:49:52,065 INFO L479 AbstractCegarLoop]: Abstraction has 31433 states and 46728 transitions. [2020-10-13 14:49:52,065 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 14:49:52,066 INFO L276 IsEmpty]: Start isEmpty. Operand 31433 states and 46728 transitions. [2020-10-13 14:49:52,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-13 14:49:52,066 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:49:52,066 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] [2020-10-13 14:49:52,067 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 14:49:52,067 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:49:52,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:49:52,067 INFO L82 PathProgramCache]: Analyzing trace with hash -1744664474, now seen corresponding path program 1 times [2020-10-13 14:49:52,067 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:49:52,067 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [102678501] [2020-10-13 14:49:52,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:49:52,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:49:52,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:49:52,176 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:49:52,176 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-13 14:49:52,176 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:49:52,177 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 87 [2020-10-13 14:49:52,177 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:49:52,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:49:52,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 14:49:52,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-13 14:49:52,177 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:49:52,368 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-13 14:49:52,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:49:52,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:49:52,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:49:52,384 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:49:52,385 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:49:52,385 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:49:52,385 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-13 14:49:52,385 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:49:52,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:49:52,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:49:52,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:49:52,386 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:49:52,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:49:52,410 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [102678501] [2020-10-13 14:49:52,410 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:49:52,411 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:49:52,411 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590362316] [2020-10-13 14:49:52,412 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:49:52,412 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:49:52,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:49:52,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:49:52,413 INFO L87 Difference]: Start difference. First operand 31433 states and 46728 transitions. Second operand 4 states. [2020-10-13 14:49:52,597 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2020-10-13 14:49:56,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:49:56,065 INFO L93 Difference]: Finished difference Result 70143 states and 104124 transitions. [2020-10-13 14:49:56,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:49:56,065 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 73 [2020-10-13 14:49:56,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:49:56,115 INFO L225 Difference]: With dead ends: 70143 [2020-10-13 14:49:56,115 INFO L226 Difference]: Without dead ends: 38749 [2020-10-13 14:49:56,167 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:49:56,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38749 states. [2020-10-13 14:49:58,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38749 to 38747. [2020-10-13 14:49:58,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38747 states. [2020-10-13 14:49:58,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38747 states to 38747 states and 57290 transitions. [2020-10-13 14:49:58,257 INFO L78 Accepts]: Start accepts. Automaton has 38747 states and 57290 transitions. Word has length 73 [2020-10-13 14:49:58,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:49:58,257 INFO L479 AbstractCegarLoop]: Abstraction has 38747 states and 57290 transitions. [2020-10-13 14:49:58,257 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:49:58,257 INFO L276 IsEmpty]: Start isEmpty. Operand 38747 states and 57290 transitions. [2020-10-13 14:49:58,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-10-13 14:49:58,273 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:49:58,274 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:49:58,274 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 14:49:58,274 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:49:58,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:49:58,275 INFO L82 PathProgramCache]: Analyzing trace with hash 282545897, now seen corresponding path program 1 times [2020-10-13 14:49:58,275 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:49:58,275 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [479288619] [2020-10-13 14:49:58,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:49:58,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:49:58,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:49:58,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:49:58,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:49:59,693 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:49:59,694 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-13 14:49:59,694 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 14:49:59,694 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1392 [2020-10-13 14:49:59,694 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:49:59,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 14:49:59,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 14:49:59,695 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-10-13 14:49:59,695 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:49:59,931 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 25 [2020-10-13 14:50:00,091 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-13 14:50:00,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:50:00,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:50:00,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:50:00,104 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:50:00,104 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:50:00,104 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:50:00,105 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-13 14:50:00,105 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:50:00,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:50:00,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:50:00,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:50:00,105 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:50:00,132 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:50:00,133 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [479288619] [2020-10-13 14:50:00,133 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 14:50:00,133 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 14:50:00,133 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957384440] [2020-10-13 14:50:00,134 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 14:50:00,134 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:50:00,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 14:50:00,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-13 14:50:00,135 INFO L87 Difference]: Start difference. First operand 38747 states and 57290 transitions. Second operand 9 states. [2020-10-13 14:50:00,369 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-13 14:50:18,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:50:18,461 INFO L93 Difference]: Finished difference Result 257469 states and 377521 transitions. [2020-10-13 14:50:18,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-13 14:50:18,462 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 98 [2020-10-13 14:50:18,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:50:18,717 INFO L225 Difference]: With dead ends: 257469 [2020-10-13 14:50:18,718 INFO L226 Difference]: Without dead ends: 218763 [2020-10-13 14:50:18,775 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=241, Invalid=815, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 14:50:18,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218763 states. [2020-10-13 14:50:26,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218763 to 65691. [2020-10-13 14:50:26,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65691 states. [2020-10-13 14:50:26,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65691 states to 65691 states and 96406 transitions. [2020-10-13 14:50:26,707 INFO L78 Accepts]: Start accepts. Automaton has 65691 states and 96406 transitions. Word has length 98 [2020-10-13 14:50:26,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:50:26,707 INFO L479 AbstractCegarLoop]: Abstraction has 65691 states and 96406 transitions. [2020-10-13 14:50:26,708 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 14:50:26,708 INFO L276 IsEmpty]: Start isEmpty. Operand 65691 states and 96406 transitions. [2020-10-13 14:50:26,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-10-13 14:50:26,727 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:50:26,727 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:50:26,727 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 14:50:26,727 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:50:26,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:50:26,728 INFO L82 PathProgramCache]: Analyzing trace with hash 1606019506, now seen corresponding path program 1 times [2020-10-13 14:50:26,728 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:50:26,728 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1568840878] [2020-10-13 14:50:26,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:50:26,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:50:26,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:50:26,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:50:27,148 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:50:27,148 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-13 14:50:27,148 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 14:50:27,148 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 398 [2020-10-13 14:50:27,149 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:50:27,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 14:50:27,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 14:50:27,149 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-13 14:50:27,149 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:50:27,338 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-13 14:50:27,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:50:27,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:50:27,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:50:27,364 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:50:27,364 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:50:27,364 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:50:27,364 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-13 14:50:27,366 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:50:27,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:50:27,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:50:27,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 14:50:27,366 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:50:27,388 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-13 14:50:27,391 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1568840878] [2020-10-13 14:50:27,391 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:50:27,391 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:50:27,391 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231054498] [2020-10-13 14:50:27,392 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 14:50:27,394 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:50:27,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 14:50:27,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:50:27,395 INFO L87 Difference]: Start difference. First operand 65691 states and 96406 transitions. Second operand 6 states. [2020-10-13 14:50:27,591 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2020-10-13 14:50:39,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:50:39,417 INFO L93 Difference]: Finished difference Result 195855 states and 286864 transitions. [2020-10-13 14:50:39,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 14:50:39,418 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 98 [2020-10-13 14:50:39,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:50:39,618 INFO L225 Difference]: With dead ends: 195855 [2020-10-13 14:50:39,618 INFO L226 Difference]: Without dead ends: 130205 [2020-10-13 14:50:39,674 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-13 14:50:39,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130205 states. [2020-10-13 14:50:52,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130205 to 130203. [2020-10-13 14:50:52,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130203 states. [2020-10-13 14:50:52,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130203 states to 130203 states and 189362 transitions. [2020-10-13 14:50:52,678 INFO L78 Accepts]: Start accepts. Automaton has 130203 states and 189362 transitions. Word has length 98 [2020-10-13 14:50:52,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:50:52,678 INFO L479 AbstractCegarLoop]: Abstraction has 130203 states and 189362 transitions. [2020-10-13 14:50:52,679 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 14:50:52,679 INFO L276 IsEmpty]: Start isEmpty. Operand 130203 states and 189362 transitions. [2020-10-13 14:50:52,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-10-13 14:50:52,700 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:50:52,700 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:50:52,700 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 14:50:52,700 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:50:52,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:50:52,701 INFO L82 PathProgramCache]: Analyzing trace with hash 1683764717, now seen corresponding path program 1 times [2020-10-13 14:50:52,701 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:50:52,701 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1718430835] [2020-10-13 14:50:52,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:50:52,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:50:52,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:50:52,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:50:53,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:50:54,978 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:50:54,978 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-13 14:50:54,978 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 14:50:54,978 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2252 [2020-10-13 14:50:54,979 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:50:54,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 14:50:54,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 14:50:54,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-13 14:50:54,979 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:50:55,320 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-13 14:50:55,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:50:55,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:50:55,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:50:55,337 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:50:55,338 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:50:55,338 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:50:55,338 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-13 14:50:55,339 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:50:55,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:50:55,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:50:55,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:50:55,340 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:50:55,392 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:50:55,393 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1718430835] [2020-10-13 14:50:55,393 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 14:50:55,393 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 14:50:55,394 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323931419] [2020-10-13 14:50:55,394 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 14:50:55,394 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:50:55,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 14:50:55,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-13 14:50:55,396 INFO L87 Difference]: Start difference. First operand 130203 states and 189362 transitions. Second operand 9 states. [2020-10-13 14:50:55,702 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-13 14:52:05,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:52:05,772 INFO L93 Difference]: Finished difference Result 751607 states and 1084786 transitions. [2020-10-13 14:52:05,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-13 14:52:05,773 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 98 [2020-10-13 14:52:05,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:52:06,637 INFO L225 Difference]: With dead ends: 751607 [2020-10-13 14:52:06,637 INFO L226 Difference]: Without dead ends: 642437 [2020-10-13 14:52:06,782 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=241, Invalid=815, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 14:52:07,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 642437 states. [2020-10-13 14:52:36,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 642437 to 219323. [2020-10-13 14:52:36,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 219323 states. [2020-10-13 14:52:36,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219323 states to 219323 states and 317494 transitions. [2020-10-13 14:52:36,941 INFO L78 Accepts]: Start accepts. Automaton has 219323 states and 317494 transitions. Word has length 98 [2020-10-13 14:52:36,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:52:36,941 INFO L479 AbstractCegarLoop]: Abstraction has 219323 states and 317494 transitions. [2020-10-13 14:52:36,941 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 14:52:36,941 INFO L276 IsEmpty]: Start isEmpty. Operand 219323 states and 317494 transitions. [2020-10-13 14:52:36,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-10-13 14:52:36,959 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:52:36,960 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:52:36,960 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 14:52:36,960 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:52:36,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:52:36,960 INFO L82 PathProgramCache]: Analyzing trace with hash -1046580156, now seen corresponding path program 1 times [2020-10-13 14:52:36,960 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:52:36,960 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [238428640] [2020-10-13 14:52:36,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:52:36,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:52:37,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:52:37,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:52:37,392 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:52:37,392 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-13 14:52:37,393 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 14:52:37,393 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 397 [2020-10-13 14:52:37,393 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:52:37,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 14:52:37,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 14:52:37,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-13 14:52:37,394 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:52:37,577 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-13 14:52:37,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:52:37,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:52:37,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:52:37,601 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:52:37,602 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:52:37,602 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:52:37,602 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-13 14:52:37,602 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:52:37,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:52:37,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:52:37,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 14:52:37,603 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:52:37,626 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-13 14:52:37,627 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [238428640] [2020-10-13 14:52:37,627 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:52:37,627 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:52:37,627 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468465206] [2020-10-13 14:52:37,628 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 14:52:37,628 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:52:37,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 14:52:37,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:52:37,628 INFO L87 Difference]: Start difference. First operand 219323 states and 317494 transitions. Second operand 6 states. [2020-10-13 14:52:37,800 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 154