/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.5.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 14:46:50,334 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 14:46:50,337 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 14:46:50,373 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 14:46:50,373 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 14:46:50,382 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 14:46:50,383 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 14:46:50,387 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 14:46:50,390 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 14:46:50,392 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 14:46:50,393 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 14:46:50,395 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 14:46:50,395 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 14:46:50,397 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 14:46:50,401 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 14:46:50,403 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 14:46:50,404 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 14:46:50,405 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 14:46:50,406 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 14:46:50,414 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 14:46:50,416 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 14:46:50,417 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 14:46:50,418 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 14:46:50,419 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 14:46:50,434 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 14:46:50,434 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 14:46:50,434 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 14:46:50,438 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 14:46:50,439 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 14:46:50,440 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 14:46:50,440 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 14:46:50,441 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 14:46:50,443 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 14:46:50,444 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 14:46:50,447 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 14:46:50,448 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 14:46:50,448 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 14:46:50,449 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 14:46:50,449 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 14:46:50,451 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 14:46:50,451 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 14:46:50,453 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 14:46:50,495 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 14:46:50,495 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 14:46:50,497 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 14:46:50,497 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 14:46:50,497 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 14:46:50,498 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 14:46:50,498 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 14:46:50,498 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 14:46:50,498 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 14:46:50,499 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 14:46:50,500 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 14:46:50,500 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 14:46:50,500 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 14:46:50,500 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 14:46:50,501 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 14:46:50,501 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 14:46:50,501 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 14:46:50,501 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 14:46:50,501 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 14:46:50,502 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 14:46:50,502 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 14:46:50,502 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 14:46:50,502 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 14:46:50,502 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 14:46:50,502 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 14:46:50,503 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 14:46:50,503 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 14:46:50,503 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 14:46:50,503 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 14:46:50,503 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 14:46:50,792 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 14:46:50,805 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 14:46:50,808 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 14:46:50,810 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 14:46:50,810 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 14:46:50,811 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.5.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-10-13 14:46:50,898 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/64a1ecabf/1431d99105744c869408564ad2d6af04/FLAGdcf55b415 [2020-10-13 14:46:51,457 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 14:46:51,458 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.5.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-10-13 14:46:51,471 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/64a1ecabf/1431d99105744c869408564ad2d6af04/FLAGdcf55b415 [2020-10-13 14:46:51,722 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/64a1ecabf/1431d99105744c869408564ad2d6af04 [2020-10-13 14:46:51,731 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 14:46:51,732 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 14:46:51,733 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 14:46:51,733 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 14:46:51,738 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 14:46:51,739 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 02:46:51" (1/1) ... [2020-10-13 14:46:51,743 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e04f8f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:46:51, skipping insertion in model container [2020-10-13 14:46:51,743 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 02:46:51" (1/1) ... [2020-10-13 14:46:51,752 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 14:46:51,820 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 14:46:52,160 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 14:46:52,174 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 14:46:52,398 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 14:46:52,419 INFO L208 MainTranslator]: Completed translation [2020-10-13 14:46:52,420 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:46:52 WrapperNode [2020-10-13 14:46:52,420 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 14:46:52,420 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 14:46:52,421 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 14:46:52,421 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 14:46:52,435 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:46:52" (1/1) ... [2020-10-13 14:46:52,435 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:46:52" (1/1) ... [2020-10-13 14:46:52,449 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:46:52" (1/1) ... [2020-10-13 14:46:52,449 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:46:52" (1/1) ... [2020-10-13 14:46:52,469 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:46:52" (1/1) ... [2020-10-13 14:46:52,484 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:46:52" (1/1) ... [2020-10-13 14:46:52,488 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:46:52" (1/1) ... [2020-10-13 14:46:52,494 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 14:46:52,495 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 14:46:52,495 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 14:46:52,495 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 14:46:52,496 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:46:52" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 14:46:52,576 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 14:46:52,576 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 14:46:52,577 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-13 14:46:52,577 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 14:46:52,578 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 14:46:52,578 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-13 14:46:52,578 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-13 14:46:52,579 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-13 14:46:52,580 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-13 14:46:52,581 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-13 14:46:52,581 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-13 14:46:52,581 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-13 14:46:52,581 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-13 14:46:52,581 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-13 14:46:52,581 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-13 14:46:52,582 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-13 14:46:52,582 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-13 14:46:52,582 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-10-13 14:46:52,583 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-13 14:46:52,583 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-13 14:46:52,583 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 14:46:52,583 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 14:46:52,583 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 14:46:53,607 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 14:46:53,608 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-13 14:46:53,613 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 02:46:53 BoogieIcfgContainer [2020-10-13 14:46:53,614 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 14:46:53,615 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 14:46:53,615 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 14:46:53,618 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 14:46:53,619 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 02:46:51" (1/3) ... [2020-10-13 14:46:53,620 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20af26de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 02:46:53, skipping insertion in model container [2020-10-13 14:46:53,620 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:46:52" (2/3) ... [2020-10-13 14:46:53,620 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20af26de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 02:46:53, skipping insertion in model container [2020-10-13 14:46:53,621 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 02:46:53" (3/3) ... [2020-10-13 14:46:53,622 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.5.1.ufo.UNBOUNDED.pals.c.v+nlh-reducer.c [2020-10-13 14:46:53,633 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 14:46:53,642 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 14:46:53,656 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 14:46:53,683 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 14:46:53,683 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 14:46:53,683 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 14:46:53,683 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 14:46:53,684 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 14:46:53,684 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 14:46:53,684 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 14:46:53,684 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 14:46:53,707 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states. [2020-10-13 14:46:53,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-13 14:46:53,719 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:46:53,720 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:46:53,721 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:46:53,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:46:53,727 INFO L82 PathProgramCache]: Analyzing trace with hash -1170257874, now seen corresponding path program 1 times [2020-10-13 14:46:53,736 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:46:53,737 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2127452527] [2020-10-13 14:46:53,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:46:54,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:46:54,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:46:54,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:46:54,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:46:57,333 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:46:57,334 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-13 14:46:57,334 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 14:46:57,335 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3275 [2020-10-13 14:46:57,339 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:46:57,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:46:57,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 65 [2020-10-13 14:46:57,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 14:46:57,340 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-13 14:46:57,670 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-13 14:46:57,674 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:46:57,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:46:57,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:46:57,710 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:46:57,711 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:46:57,711 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:46:57,711 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-13 14:46:57,712 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:46:57,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:46:57,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:46:57,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:46:57,712 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:46:57,748 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 14:46:57,749 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2127452527] [2020-10-13 14:46:57,751 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:46:57,751 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:46:57,752 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98457856] [2020-10-13 14:46:57,757 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:46:57,758 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:46:57,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:46:57,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:46:57,775 INFO L87 Difference]: Start difference. First operand 220 states. Second operand 4 states. [2020-10-13 14:46:58,030 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 148 [2020-10-13 14:46:59,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:46:59,336 INFO L93 Difference]: Finished difference Result 443 states and 725 transitions. [2020-10-13 14:46:59,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:46:59,338 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 84 [2020-10-13 14:46:59,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:46:59,355 INFO L225 Difference]: With dead ends: 443 [2020-10-13 14:46:59,355 INFO L226 Difference]: Without dead ends: 332 [2020-10-13 14:46:59,359 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 14:46:59,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2020-10-13 14:46:59,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 330. [2020-10-13 14:46:59,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 330 states. [2020-10-13 14:46:59,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 494 transitions. [2020-10-13 14:46:59,434 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 494 transitions. Word has length 84 [2020-10-13 14:46:59,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:46:59,435 INFO L479 AbstractCegarLoop]: Abstraction has 330 states and 494 transitions. [2020-10-13 14:46:59,435 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:46:59,435 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 494 transitions. [2020-10-13 14:46:59,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-13 14:46:59,439 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:46:59,439 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:46:59,440 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 14:46:59,440 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:46:59,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:46:59,440 INFO L82 PathProgramCache]: Analyzing trace with hash 2097746024, now seen corresponding path program 1 times [2020-10-13 14:46:59,441 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:46:59,441 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1596279148] [2020-10-13 14:46:59,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:46:59,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:46:59,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:46:59,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:47:01,623 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:47:01,624 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-13 14:47:01,625 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 14:47:01,628 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2147 [2020-10-13 14:47:01,629 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:47:01,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 14:47:01,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 87 [2020-10-13 14:47:01,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-13 14:47:01,630 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:47:01,902 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-13 14:47:01,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:47:01,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:47:01,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:47:01,923 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:47:01,923 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:47:01,923 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:47:01,923 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-13 14:47:01,924 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:47:01,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:47:01,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:47:01,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:47:01,925 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:47:01,940 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 14:47:01,941 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1596279148] [2020-10-13 14:47:01,941 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:47:01,942 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:47:01,942 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969423603] [2020-10-13 14:47:01,944 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 14:47:01,944 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:47:01,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 14:47:01,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:47:01,945 INFO L87 Difference]: Start difference. First operand 330 states and 494 transitions. Second operand 5 states. [2020-10-13 14:47:03,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:47:03,041 INFO L93 Difference]: Finished difference Result 507 states and 774 transitions. [2020-10-13 14:47:03,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 14:47:03,042 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 85 [2020-10-13 14:47:03,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:47:03,046 INFO L225 Difference]: With dead ends: 507 [2020-10-13 14:47:03,046 INFO L226 Difference]: Without dead ends: 505 [2020-10-13 14:47:03,048 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:47:03,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2020-10-13 14:47:03,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 332. [2020-10-13 14:47:03,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 332 states. [2020-10-13 14:47:03,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 496 transitions. [2020-10-13 14:47:03,089 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 496 transitions. Word has length 85 [2020-10-13 14:47:03,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:47:03,090 INFO L479 AbstractCegarLoop]: Abstraction has 332 states and 496 transitions. [2020-10-13 14:47:03,090 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 14:47:03,092 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 496 transitions. [2020-10-13 14:47:03,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-13 14:47:03,095 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:47:03,098 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:47:03,098 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 14:47:03,099 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:47:03,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:47:03,099 INFO L82 PathProgramCache]: Analyzing trace with hash 884071159, now seen corresponding path program 1 times [2020-10-13 14:47:03,100 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:47:03,100 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1828521286] [2020-10-13 14:47:03,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:47:03,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:47:03,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:47:03,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:47:04,092 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:47:04,092 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-13 14:47:04,093 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 14:47:04,093 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 941 [2020-10-13 14:47:04,093 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:47:04,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 14:47:04,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-13 14:47:04,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-13 14:47:04,094 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:47:04,377 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-13 14:47:04,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:47:04,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:47:04,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:47:04,393 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:47:04,393 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:47:04,393 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:47:04,394 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-13 14:47:04,394 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:47:04,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:47:04,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:47:04,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:47:04,395 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:47:04,445 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 14:47:04,446 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1828521286] [2020-10-13 14:47:04,446 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:47:04,446 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-13 14:47:04,447 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68193352] [2020-10-13 14:47:04,447 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 14:47:04,447 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:47:04,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 14:47:04,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 14:47:04,449 INFO L87 Difference]: Start difference. First operand 332 states and 496 transitions. Second operand 8 states. [2020-10-13 14:47:07,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:47:07,380 INFO L93 Difference]: Finished difference Result 1428 states and 2208 transitions. [2020-10-13 14:47:07,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 14:47:07,380 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 86 [2020-10-13 14:47:07,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:47:07,388 INFO L225 Difference]: With dead ends: 1428 [2020-10-13 14:47:07,388 INFO L226 Difference]: Without dead ends: 1180 [2020-10-13 14:47:07,391 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 14:47:07,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1180 states. [2020-10-13 14:47:07,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1180 to 1172. [2020-10-13 14:47:07,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1172 states. [2020-10-13 14:47:07,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1172 states to 1172 states and 1805 transitions. [2020-10-13 14:47:07,463 INFO L78 Accepts]: Start accepts. Automaton has 1172 states and 1805 transitions. Word has length 86 [2020-10-13 14:47:07,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:47:07,464 INFO L479 AbstractCegarLoop]: Abstraction has 1172 states and 1805 transitions. [2020-10-13 14:47:07,464 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 14:47:07,464 INFO L276 IsEmpty]: Start isEmpty. Operand 1172 states and 1805 transitions. [2020-10-13 14:47:07,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-13 14:47:07,467 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:47:07,467 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:47:07,468 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 14:47:07,468 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:47:07,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:47:07,468 INFO L82 PathProgramCache]: Analyzing trace with hash 1234469626, now seen corresponding path program 1 times [2020-10-13 14:47:07,469 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:47:07,469 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2099046662] [2020-10-13 14:47:07,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:47:07,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:47:07,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:47:07,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:47:07,987 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:47:07,987 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-13 14:47:07,987 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 14:47:07,987 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 492 [2020-10-13 14:47:07,988 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:47:07,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 14:47:07,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 14:47:07,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-13 14:47:07,989 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:47:08,188 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-13 14:47:08,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:47:08,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:47:08,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:47:08,224 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:47:08,224 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:47:08,224 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:47:08,225 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-13 14:47:08,225 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:47:08,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:47:08,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:47:08,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 14:47:08,226 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:47:08,252 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 14:47:08,253 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2099046662] [2020-10-13 14:47:08,253 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:47:08,253 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:47:08,254 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707351570] [2020-10-13 14:47:08,254 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 14:47:08,255 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:47:08,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 14:47:08,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:47:08,255 INFO L87 Difference]: Start difference. First operand 1172 states and 1805 transitions. Second operand 6 states. [2020-10-13 14:47:08,575 WARN L193 SmtUtils]: Spent 264.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2020-10-13 14:47:09,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:47:09,652 INFO L93 Difference]: Finished difference Result 3211 states and 4999 transitions. [2020-10-13 14:47:09,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 14:47:09,653 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 87 [2020-10-13 14:47:09,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:47:09,667 INFO L225 Difference]: With dead ends: 3211 [2020-10-13 14:47:09,667 INFO L226 Difference]: Without dead ends: 2085 [2020-10-13 14:47:09,676 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-13 14:47:09,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2085 states. [2020-10-13 14:47:09,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2085 to 2083. [2020-10-13 14:47:09,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2083 states. [2020-10-13 14:47:09,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2083 states to 2083 states and 3223 transitions. [2020-10-13 14:47:09,828 INFO L78 Accepts]: Start accepts. Automaton has 2083 states and 3223 transitions. Word has length 87 [2020-10-13 14:47:09,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:47:09,829 INFO L479 AbstractCegarLoop]: Abstraction has 2083 states and 3223 transitions. [2020-10-13 14:47:09,829 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 14:47:09,829 INFO L276 IsEmpty]: Start isEmpty. Operand 2083 states and 3223 transitions. [2020-10-13 14:47:09,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-13 14:47:09,839 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:47:09,840 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:47:09,840 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 14:47:09,840 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:47:09,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:47:09,841 INFO L82 PathProgramCache]: Analyzing trace with hash -1120386679, now seen corresponding path program 1 times [2020-10-13 14:47:09,841 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:47:09,841 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [317623397] [2020-10-13 14:47:09,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:47:09,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:47:09,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:47:10,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:47:10,475 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:47:10,476 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-13 14:47:10,476 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 14:47:10,476 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 607 [2020-10-13 14:47:10,476 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:47:10,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 14:47:10,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 14:47:10,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-13 14:47:10,532 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 55 [2020-10-13 14:47:10,742 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-13 14:47:10,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:47:10,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:47:10,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:47:10,779 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:47:10,779 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:47:10,779 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:47:10,780 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-13 14:47:10,780 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:47:10,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:47:10,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:47:10,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 14:47:10,782 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:47:10,818 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 14:47:10,820 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [317623397] [2020-10-13 14:47:10,821 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:47:10,821 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:47:10,822 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197565147] [2020-10-13 14:47:10,824 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 14:47:10,824 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:47:10,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 14:47:10,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:47:10,825 INFO L87 Difference]: Start difference. First operand 2083 states and 3223 transitions. Second operand 6 states. [2020-10-13 14:47:11,091 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-13 14:47:12,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:47:12,310 INFO L93 Difference]: Finished difference Result 5845 states and 9109 transitions. [2020-10-13 14:47:12,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 14:47:12,311 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 87 [2020-10-13 14:47:12,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:47:12,331 INFO L225 Difference]: With dead ends: 5845 [2020-10-13 14:47:12,331 INFO L226 Difference]: Without dead ends: 3824 [2020-10-13 14:47:12,337 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-13 14:47:12,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3824 states. [2020-10-13 14:47:12,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3824 to 3822. [2020-10-13 14:47:12,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3822 states. [2020-10-13 14:47:12,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3822 states to 3822 states and 5921 transitions. [2020-10-13 14:47:12,627 INFO L78 Accepts]: Start accepts. Automaton has 3822 states and 5921 transitions. Word has length 87 [2020-10-13 14:47:12,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:47:12,628 INFO L479 AbstractCegarLoop]: Abstraction has 3822 states and 5921 transitions. [2020-10-13 14:47:12,628 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 14:47:12,628 INFO L276 IsEmpty]: Start isEmpty. Operand 3822 states and 5921 transitions. [2020-10-13 14:47:12,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-13 14:47:12,632 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:47:12,632 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:47:12,633 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 14:47:12,633 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:47:12,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:47:12,633 INFO L82 PathProgramCache]: Analyzing trace with hash 1444582424, now seen corresponding path program 1 times [2020-10-13 14:47:12,633 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:47:12,634 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [13190592] [2020-10-13 14:47:12,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:47:12,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:47:12,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:47:12,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:47:13,274 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:47:13,274 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-13 14:47:13,275 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 14:47:13,275 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 617 [2020-10-13 14:47:13,275 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:47:13,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 14:47:13,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 14:47:13,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-13 14:47:13,277 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:47:13,504 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-13 14:47:13,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:47:13,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:47:13,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:47:13,530 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:47:13,530 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:47:13,530 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:47:13,531 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-13 14:47:13,531 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:47:13,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:47:13,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:47:13,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 14:47:13,532 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:47:13,555 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 14:47:13,556 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [13190592] [2020-10-13 14:47:13,557 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:47:13,559 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:47:13,559 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986356015] [2020-10-13 14:47:13,560 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 14:47:13,561 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:47:13,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 14:47:13,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:47:13,561 INFO L87 Difference]: Start difference. First operand 3822 states and 5921 transitions. Second operand 6 states. [2020-10-13 14:47:13,792 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-13 14:47:15,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:47:15,288 INFO L93 Difference]: Finished difference Result 10854 states and 16849 transitions. [2020-10-13 14:47:15,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 14:47:15,288 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 87 [2020-10-13 14:47:15,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:47:15,324 INFO L225 Difference]: With dead ends: 10854 [2020-10-13 14:47:15,324 INFO L226 Difference]: Without dead ends: 7117 [2020-10-13 14:47:15,336 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-13 14:47:15,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7117 states. [2020-10-13 14:47:15,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7117 to 7115. [2020-10-13 14:47:15,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7115 states. [2020-10-13 14:47:15,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7115 states to 7115 states and 10968 transitions. [2020-10-13 14:47:15,797 INFO L78 Accepts]: Start accepts. Automaton has 7115 states and 10968 transitions. Word has length 87 [2020-10-13 14:47:15,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:47:15,798 INFO L479 AbstractCegarLoop]: Abstraction has 7115 states and 10968 transitions. [2020-10-13 14:47:15,798 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 14:47:15,798 INFO L276 IsEmpty]: Start isEmpty. Operand 7115 states and 10968 transitions. [2020-10-13 14:47:15,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-13 14:47:15,804 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:47:15,805 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:47:15,805 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 14:47:15,805 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:47:15,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:47:15,805 INFO L82 PathProgramCache]: Analyzing trace with hash -145507673, now seen corresponding path program 1 times [2020-10-13 14:47:15,806 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:47:15,806 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [824316664] [2020-10-13 14:47:15,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:47:15,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:47:15,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:47:15,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:47:16,323 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:47:16,323 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-13 14:47:16,323 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 14:47:16,324 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 494 [2020-10-13 14:47:16,324 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:47:16,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 14:47:16,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 14:47:16,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-13 14:47:16,325 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:47:16,504 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-13 14:47:16,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:47:16,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:47:16,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:47:16,528 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:47:16,528 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:47:16,528 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:47:16,529 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-13 14:47:16,529 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:47:16,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:47:16,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:47:16,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 14:47:16,530 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:47:16,549 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 14:47:16,550 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [824316664] [2020-10-13 14:47:16,550 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:47:16,550 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:47:16,551 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734985172] [2020-10-13 14:47:16,551 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 14:47:16,551 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:47:16,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 14:47:16,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:47:16,552 INFO L87 Difference]: Start difference. First operand 7115 states and 10968 transitions. Second operand 6 states. [2020-10-13 14:47:16,726 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 151 [2020-10-13 14:47:18,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:47:18,307 INFO L93 Difference]: Finished difference Result 20439 states and 31567 transitions. [2020-10-13 14:47:18,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 14:47:18,308 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 87 [2020-10-13 14:47:18,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:47:18,367 INFO L225 Difference]: With dead ends: 20439 [2020-10-13 14:47:18,367 INFO L226 Difference]: Without dead ends: 13439 [2020-10-13 14:47:18,383 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 14:47:18,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13439 states. [2020-10-13 14:47:19,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13439 to 13437. [2020-10-13 14:47:19,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13437 states. [2020-10-13 14:47:19,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13437 states to 13437 states and 20637 transitions. [2020-10-13 14:47:19,362 INFO L78 Accepts]: Start accepts. Automaton has 13437 states and 20637 transitions. Word has length 87 [2020-10-13 14:47:19,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:47:19,363 INFO L479 AbstractCegarLoop]: Abstraction has 13437 states and 20637 transitions. [2020-10-13 14:47:19,363 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 14:47:19,363 INFO L276 IsEmpty]: Start isEmpty. Operand 13437 states and 20637 transitions. [2020-10-13 14:47:19,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-13 14:47:19,371 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:47:19,372 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:47:19,372 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 14:47:19,372 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:47:19,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:47:19,373 INFO L82 PathProgramCache]: Analyzing trace with hash 1799091510, now seen corresponding path program 1 times [2020-10-13 14:47:19,373 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:47:19,373 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1620628357] [2020-10-13 14:47:19,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:47:19,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:47:19,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:47:19,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:47:19,837 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:47:19,837 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-13 14:47:19,837 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 14:47:19,837 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 441 [2020-10-13 14:47:19,837 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:47:19,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 14:47:19,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 14:47:19,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-13 14:47:19,838 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:47:20,033 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-13 14:47:20,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:47:20,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:47:20,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:47:20,070 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:47:20,070 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:47:20,070 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:47:20,071 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 26 [2020-10-13 14:47:20,071 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:47:20,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:47:20,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:47:20,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 14:47:20,072 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:47:20,107 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 14:47:20,109 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1620628357] [2020-10-13 14:47:20,115 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:47:20,116 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:47:20,117 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508799022] [2020-10-13 14:47:20,117 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 14:47:20,118 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:47:20,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 14:47:20,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:47:20,119 INFO L87 Difference]: Start difference. First operand 13437 states and 20637 transitions. Second operand 6 states. [2020-10-13 14:47:20,397 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification that was a NOOP. DAG size: 153 [2020-10-13 14:47:23,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:47:23,288 INFO L93 Difference]: Finished difference Result 39111 states and 60117 transitions. [2020-10-13 14:47:23,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 14:47:23,289 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 87 [2020-10-13 14:47:23,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:47:23,348 INFO L225 Difference]: With dead ends: 39111 [2020-10-13 14:47:23,348 INFO L226 Difference]: Without dead ends: 25823 [2020-10-13 14:47:23,378 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-13 14:47:23,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25823 states. [2020-10-13 14:47:25,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25823 to 25821. [2020-10-13 14:47:25,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25821 states. [2020-10-13 14:47:25,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25821 states to 25821 states and 39496 transitions. [2020-10-13 14:47:25,528 INFO L78 Accepts]: Start accepts. Automaton has 25821 states and 39496 transitions. Word has length 87 [2020-10-13 14:47:25,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:47:25,528 INFO L479 AbstractCegarLoop]: Abstraction has 25821 states and 39496 transitions. [2020-10-13 14:47:25,528 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 14:47:25,528 INFO L276 IsEmpty]: Start isEmpty. Operand 25821 states and 39496 transitions. [2020-10-13 14:47:25,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-13 14:47:25,539 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:47:25,539 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:47:25,539 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 14:47:25,539 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:47:25,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:47:25,540 INFO L82 PathProgramCache]: Analyzing trace with hash -1277004660, now seen corresponding path program 1 times [2020-10-13 14:47:25,540 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:47:25,540 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [329283946] [2020-10-13 14:47:25,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:47:25,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:47:25,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:47:25,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:47:25,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:47:26,880 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:47:26,880 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-13 14:47:26,881 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 14:47:26,881 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1306 [2020-10-13 14:47:26,881 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:47:26,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 14:47:26,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 14:47:26,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-13 14:47:26,882 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:47:27,210 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-13 14:47:27,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:47:27,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:47:27,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:47:27,228 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:47:27,228 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:47:27,229 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:47:27,229 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-13 14:47:27,229 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:47:27,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:47:27,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:47:27,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:47:27,230 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:47:27,261 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 14:47:27,262 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [329283946] [2020-10-13 14:47:27,262 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:47:27,262 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-13 14:47:27,263 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219244199] [2020-10-13 14:47:27,263 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 14:47:27,263 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:47:27,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 14:47:27,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-13 14:47:27,264 INFO L87 Difference]: Start difference. First operand 25821 states and 39496 transitions. Second operand 9 states. [2020-10-13 14:47:27,546 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-13 14:47:35,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:47:35,934 INFO L93 Difference]: Finished difference Result 139186 states and 212229 transitions. [2020-10-13 14:47:35,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-13 14:47:35,934 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 88 [2020-10-13 14:47:35,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:47:36,233 INFO L225 Difference]: With dead ends: 139186 [2020-10-13 14:47:36,233 INFO L226 Difference]: Without dead ends: 113957 [2020-10-13 14:47:36,310 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=131, Invalid=469, Unknown=0, NotChecked=0, Total=600 [2020-10-13 14:47:36,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113957 states. [2020-10-13 14:47:40,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113957 to 25903. [2020-10-13 14:47:40,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25903 states. [2020-10-13 14:47:40,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25903 states to 25903 states and 39585 transitions. [2020-10-13 14:47:40,463 INFO L78 Accepts]: Start accepts. Automaton has 25903 states and 39585 transitions. Word has length 88 [2020-10-13 14:47:40,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:47:40,464 INFO L479 AbstractCegarLoop]: Abstraction has 25903 states and 39585 transitions. [2020-10-13 14:47:40,464 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 14:47:40,464 INFO L276 IsEmpty]: Start isEmpty. Operand 25903 states and 39585 transitions. [2020-10-13 14:47:40,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-13 14:47:40,476 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:47:40,476 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:47:40,476 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 14:47:40,476 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:47:40,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:47:40,477 INFO L82 PathProgramCache]: Analyzing trace with hash 907618540, now seen corresponding path program 1 times [2020-10-13 14:47:40,477 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:47:40,477 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [855114587] [2020-10-13 14:47:40,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:47:40,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:47:40,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:47:40,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:47:40,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:47:41,834 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:47:41,835 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-13 14:47:41,835 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 14:47:41,835 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1330 [2020-10-13 14:47:41,835 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:47:41,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 14:47:41,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 14:47:41,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-13 14:47:41,836 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:47:42,210 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-13 14:47:42,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:47:42,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:47:42,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:47:42,233 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:47:42,234 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:47:42,234 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:47:42,234 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-13 14:47:42,234 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:47:42,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:47:42,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:47:42,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:47:42,235 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:47:42,259 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 14:47:42,259 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [855114587] [2020-10-13 14:47:42,260 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:47:42,260 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-13 14:47:42,260 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498629147] [2020-10-13 14:47:42,260 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 14:47:42,261 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:47:42,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 14:47:42,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-13 14:47:42,261 INFO L87 Difference]: Start difference. First operand 25903 states and 39585 transitions. Second operand 9 states. [2020-10-13 14:47:42,486 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-13 14:47:56,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:47:56,098 INFO L93 Difference]: Finished difference Result 142895 states and 216918 transitions. [2020-10-13 14:47:56,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-13 14:47:56,098 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 88 [2020-10-13 14:47:56,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:47:56,416 INFO L225 Difference]: With dead ends: 142895 [2020-10-13 14:47:56,416 INFO L226 Difference]: Without dead ends: 124352 [2020-10-13 14:47:56,464 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=131, Invalid=469, Unknown=0, NotChecked=0, Total=600 [2020-10-13 14:47:56,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124352 states. [2020-10-13 14:47:59,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124352 to 26189. [2020-10-13 14:47:59,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26189 states. [2020-10-13 14:47:59,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26189 states to 26189 states and 39950 transitions. [2020-10-13 14:47:59,490 INFO L78 Accepts]: Start accepts. Automaton has 26189 states and 39950 transitions. Word has length 88 [2020-10-13 14:47:59,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:47:59,491 INFO L479 AbstractCegarLoop]: Abstraction has 26189 states and 39950 transitions. [2020-10-13 14:47:59,491 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 14:47:59,491 INFO L276 IsEmpty]: Start isEmpty. Operand 26189 states and 39950 transitions. [2020-10-13 14:47:59,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-13 14:47:59,499 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:47:59,499 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:47:59,499 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 14:47:59,500 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:47:59,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:47:59,500 INFO L82 PathProgramCache]: Analyzing trace with hash 1677172044, now seen corresponding path program 1 times [2020-10-13 14:47:59,500 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:47:59,501 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1285593917] [2020-10-13 14:47:59,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:47:59,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:47:59,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:47:59,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:47:59,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:48:01,329 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:48:01,329 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-13 14:48:01,329 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 14:48:01,330 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1800 [2020-10-13 14:48:01,330 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:48:01,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 14:48:01,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 14:48:01,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-13 14:48:01,330 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:48:01,685 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-13 14:48:01,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:48:01,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:48:01,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:48:01,696 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:48:01,696 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:48:01,696 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:48:01,697 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 14:48:01,697 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:48:01,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:48:01,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:48:01,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:48:01,697 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:48:01,725 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 14:48:01,726 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1285593917] [2020-10-13 14:48:01,726 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:48:01,726 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-13 14:48:01,727 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397015979] [2020-10-13 14:48:01,727 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 14:48:01,727 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:48:01,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 14:48:01,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-13 14:48:01,728 INFO L87 Difference]: Start difference. First operand 26189 states and 39950 transitions. Second operand 9 states. [2020-10-13 14:48:01,971 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-13 14:48:17,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:48:17,832 INFO L93 Difference]: Finished difference Result 143049 states and 218184 transitions. [2020-10-13 14:48:17,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-13 14:48:17,833 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 88 [2020-10-13 14:48:17,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:48:18,069 INFO L225 Difference]: With dead ends: 143049 [2020-10-13 14:48:18,069 INFO L226 Difference]: Without dead ends: 126938 [2020-10-13 14:48:18,111 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=131, Invalid=469, Unknown=0, NotChecked=0, Total=600 [2020-10-13 14:48:18,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126938 states. [2020-10-13 14:48:23,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126938 to 26719. [2020-10-13 14:48:23,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26719 states. [2020-10-13 14:48:23,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26719 states to 26719 states and 40642 transitions. [2020-10-13 14:48:23,127 INFO L78 Accepts]: Start accepts. Automaton has 26719 states and 40642 transitions. Word has length 88 [2020-10-13 14:48:23,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:48:23,127 INFO L479 AbstractCegarLoop]: Abstraction has 26719 states and 40642 transitions. [2020-10-13 14:48:23,127 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 14:48:23,127 INFO L276 IsEmpty]: Start isEmpty. Operand 26719 states and 40642 transitions. [2020-10-13 14:48:23,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-13 14:48:23,134 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:48:23,134 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:48:23,134 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 14:48:23,134 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:48:23,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:48:23,134 INFO L82 PathProgramCache]: Analyzing trace with hash 1562759596, now seen corresponding path program 1 times [2020-10-13 14:48:23,135 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:48:23,135 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [439665315] [2020-10-13 14:48:23,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:48:23,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:48:23,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:48:23,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:48:23,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:48:24,406 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:48:24,407 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-13 14:48:24,407 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 14:48:24,407 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1246 [2020-10-13 14:48:24,407 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:48:24,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 14:48:24,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 14:48:24,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-13 14:48:24,408 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:48:24,762 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-13 14:48:24,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:48:24,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:48:24,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:48:24,774 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:48:24,774 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:48:24,774 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:48:24,774 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 14:48:24,774 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:48:24,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:48:24,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:48:24,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:48:24,775 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:48:24,800 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 14:48:24,801 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [439665315] [2020-10-13 14:48:24,801 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:48:24,801 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-13 14:48:24,801 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12028008] [2020-10-13 14:48:24,802 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 14:48:24,802 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:48:24,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 14:48:24,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-13 14:48:24,803 INFO L87 Difference]: Start difference. First operand 26719 states and 40642 transitions. Second operand 9 states. [2020-10-13 14:48:25,030 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-13 14:48:42,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:48:42,298 INFO L93 Difference]: Finished difference Result 114282 states and 172750 transitions. [2020-10-13 14:48:42,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-13 14:48:42,298 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 88 [2020-10-13 14:48:42,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:48:42,481 INFO L225 Difference]: With dead ends: 114282 [2020-10-13 14:48:42,482 INFO L226 Difference]: Without dead ends: 105880 [2020-10-13 14:48:42,514 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=138, Invalid=512, Unknown=0, NotChecked=0, Total=650 [2020-10-13 14:48:42,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105880 states. [2020-10-13 14:48:46,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105880 to 27447. [2020-10-13 14:48:46,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27447 states. [2020-10-13 14:48:46,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27447 states to 27447 states and 41653 transitions. [2020-10-13 14:48:46,559 INFO L78 Accepts]: Start accepts. Automaton has 27447 states and 41653 transitions. Word has length 88 [2020-10-13 14:48:46,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:48:46,560 INFO L479 AbstractCegarLoop]: Abstraction has 27447 states and 41653 transitions. [2020-10-13 14:48:46,560 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 14:48:46,560 INFO L276 IsEmpty]: Start isEmpty. Operand 27447 states and 41653 transitions. [2020-10-13 14:48:46,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-13 14:48:46,567 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:48:46,567 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:48:46,567 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 14:48:46,568 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:48:46,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:48:46,568 INFO L82 PathProgramCache]: Analyzing trace with hash 2035009036, now seen corresponding path program 1 times [2020-10-13 14:48:46,568 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:48:46,568 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1293160022] [2020-10-13 14:48:46,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:48:46,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:48:46,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:48:46,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:48:46,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:48:47,409 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:48:47,409 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-13 14:48:47,409 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 14:48:47,409 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 815 [2020-10-13 14:48:47,410 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:48:47,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 14:48:47,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 14:48:47,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-13 14:48:47,410 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:48:47,731 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-13 14:48:47,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:48:47,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:48:47,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:48:47,741 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:48:47,741 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:48:47,741 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:48:47,741 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 14:48:47,741 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:48:47,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:48:47,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:48:47,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:48:47,742 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:48:47,759 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 14:48:47,759 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1293160022] [2020-10-13 14:48:47,759 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:48:47,759 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-13 14:48:47,760 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477914704] [2020-10-13 14:48:47,760 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 14:48:47,760 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:48:47,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 14:48:47,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-13 14:48:47,761 INFO L87 Difference]: Start difference. First operand 27447 states and 41653 transitions. Second operand 9 states. [2020-10-13 14:48:47,984 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 157 [2020-10-13 14:49:06,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:49:06,398 INFO L93 Difference]: Finished difference Result 118252 states and 180035 transitions. [2020-10-13 14:49:06,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-13 14:49:06,398 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 88 [2020-10-13 14:49:06,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:49:06,538 INFO L225 Difference]: With dead ends: 118252 [2020-10-13 14:49:06,538 INFO L226 Difference]: Without dead ends: 112141 [2020-10-13 14:49:06,566 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=126, Invalid=426, Unknown=0, NotChecked=0, Total=552 [2020-10-13 14:49:06,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112141 states. [2020-10-13 14:49:12,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112141 to 27209. [2020-10-13 14:49:12,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27209 states. [2020-10-13 14:49:12,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27209 states to 27209 states and 41299 transitions. [2020-10-13 14:49:12,190 INFO L78 Accepts]: Start accepts. Automaton has 27209 states and 41299 transitions. Word has length 88 [2020-10-13 14:49:12,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:49:12,190 INFO L479 AbstractCegarLoop]: Abstraction has 27209 states and 41299 transitions. [2020-10-13 14:49:12,190 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 14:49:12,190 INFO L276 IsEmpty]: Start isEmpty. Operand 27209 states and 41299 transitions. [2020-10-13 14:49:12,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-13 14:49:12,198 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:49:12,198 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:49:12,198 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 14:49:12,198 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:49:12,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:49:12,199 INFO L82 PathProgramCache]: Analyzing trace with hash -1413771914, now seen corresponding path program 1 times [2020-10-13 14:49:12,199 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:49:12,199 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1768673119] [2020-10-13 14:49:12,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:49:12,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:49:12,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:49:12,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:49:12,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:49:13,928 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:49:13,929 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-13 14:49:13,929 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 14:49:13,929 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1707 [2020-10-13 14:49:13,929 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:49:13,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:49:13,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 52 [2020-10-13 14:49:13,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-13 14:49:13,929 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:49:14,104 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-13 14:49:14,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:49:14,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:49:14,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:49:14,115 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:49:14,116 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:49:14,116 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:49:14,116 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 14:49:14,116 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:49:14,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:49:14,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:49:14,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:49:14,116 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:49:14,127 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 14:49:14,127 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1768673119] [2020-10-13 14:49:14,127 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:49:14,127 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:49:14,127 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141693672] [2020-10-13 14:49:14,128 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:49:14,128 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:49:14,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:49:14,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:49:14,128 INFO L87 Difference]: Start difference. First operand 27209 states and 41299 transitions. Second operand 4 states. [2020-10-13 14:49:14,307 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2020-10-13 14:49:20,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:49:20,691 INFO L93 Difference]: Finished difference Result 57062 states and 86873 transitions. [2020-10-13 14:49:20,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:49:20,692 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 89 [2020-10-13 14:49:20,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:49:20,734 INFO L225 Difference]: With dead ends: 57062 [2020-10-13 14:49:20,734 INFO L226 Difference]: Without dead ends: 35739 [2020-10-13 14:49:20,756 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 14:49:20,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35739 states. [2020-10-13 14:49:26,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35739 to 35481. [2020-10-13 14:49:26,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35481 states. [2020-10-13 14:49:26,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35481 states to 35481 states and 53319 transitions. [2020-10-13 14:49:26,201 INFO L78 Accepts]: Start accepts. Automaton has 35481 states and 53319 transitions. Word has length 89 [2020-10-13 14:49:26,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:49:26,201 INFO L479 AbstractCegarLoop]: Abstraction has 35481 states and 53319 transitions. [2020-10-13 14:49:26,201 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:49:26,201 INFO L276 IsEmpty]: Start isEmpty. Operand 35481 states and 53319 transitions. [2020-10-13 14:49:26,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-13 14:49:26,209 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:49:26,210 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:49:26,210 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 14:49:26,210 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:49:26,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:49:26,210 INFO L82 PathProgramCache]: Analyzing trace with hash -862358602, now seen corresponding path program 1 times [2020-10-13 14:49:26,210 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:49:26,210 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [431719389] [2020-10-13 14:49:26,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:49:26,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:49:26,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:49:26,339 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:49:26,339 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-13 14:49:26,339 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:49:26,339 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 103 [2020-10-13 14:49:26,339 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:49:26,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 14:49:26,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 14:49:26,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 79 [2020-10-13 14:49:26,340 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:49:26,547 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-13 14:49:26,548 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:49:26,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:49:26,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:49:26,558 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:49:26,559 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:49:26,559 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:49:26,559 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 14:49:26,559 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:49:26,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:49:26,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:49:26,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:49:26,560 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:49:26,583 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 14:49:26,583 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [431719389] [2020-10-13 14:49:26,583 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:49:26,584 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:49:26,584 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470496628] [2020-10-13 14:49:26,584 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 14:49:26,584 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:49:26,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 14:49:26,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:49:26,585 INFO L87 Difference]: Start difference. First operand 35481 states and 53319 transitions. Second operand 5 states. [2020-10-13 14:49:26,807 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 154 [2020-10-13 14:49:39,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:49:39,024 INFO L93 Difference]: Finished difference Result 96613 states and 145177 transitions. [2020-10-13 14:49:39,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 14:49:39,025 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 89 [2020-10-13 14:49:39,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:49:39,123 INFO L225 Difference]: With dead ends: 96613 [2020-10-13 14:49:39,123 INFO L226 Difference]: Without dead ends: 63683 [2020-10-13 14:49:39,157 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 14:49:39,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63683 states. [2020-10-13 14:49:49,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63683 to 63265. [2020-10-13 14:49:49,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63265 states. [2020-10-13 14:49:49,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63265 states to 63265 states and 94247 transitions. [2020-10-13 14:49:49,210 INFO L78 Accepts]: Start accepts. Automaton has 63265 states and 94247 transitions. Word has length 89 [2020-10-13 14:49:49,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:49:49,210 INFO L479 AbstractCegarLoop]: Abstraction has 63265 states and 94247 transitions. [2020-10-13 14:49:49,210 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 14:49:49,211 INFO L276 IsEmpty]: Start isEmpty. Operand 63265 states and 94247 transitions. [2020-10-13 14:49:49,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-13 14:49:49,218 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:49:49,218 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:49:49,219 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 14:49:49,219 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:49:49,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:49:49,219 INFO L82 PathProgramCache]: Analyzing trace with hash -885359912, now seen corresponding path program 1 times [2020-10-13 14:49:49,220 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:49:49,220 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1488874655] [2020-10-13 14:49:49,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:49:49,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:49:49,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:49:49,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:49:49,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:49:51,052 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:49:51,053 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-13 14:49:51,053 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 14:49:51,053 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1813 [2020-10-13 14:49:51,053 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:49:51,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:49:51,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 56 [2020-10-13 14:49:51,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-13 14:49:51,054 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:49:51,221 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-13 14:49:51,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:49:51,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:49:51,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:49:51,231 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:49:51,231 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:49:51,231 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:49:51,232 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 14:49:51,232 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:49:51,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:49:51,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:49:51,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:49:51,232 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:49:51,242 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 14:49:51,242 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1488874655] [2020-10-13 14:49:51,242 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:49:51,242 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:49:51,243 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560286369] [2020-10-13 14:49:51,243 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:49:51,243 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:49:51,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:49:51,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:49:51,244 INFO L87 Difference]: Start difference. First operand 63265 states and 94247 transitions. Second operand 4 states. [2020-10-13 14:49:51,420 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 149 [2020-10-13 14:50:09,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:50:09,489 INFO L93 Difference]: Finished difference Result 140423 states and 209457 transitions. [2020-10-13 14:50:09,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:50:09,489 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 89 [2020-10-13 14:50:09,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:50:09,611 INFO L225 Difference]: With dead ends: 140423 [2020-10-13 14:50:09,612 INFO L226 Difference]: Without dead ends: 97033 [2020-10-13 14:50:09,646 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 14:50:09,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97033 states. [2020-10-13 14:50:28,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97033 to 96439. [2020-10-13 14:50:28,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96439 states. [2020-10-13 14:50:28,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96439 states to 96439 states and 142367 transitions. [2020-10-13 14:50:28,300 INFO L78 Accepts]: Start accepts. Automaton has 96439 states and 142367 transitions. Word has length 89 [2020-10-13 14:50:28,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:50:28,300 INFO L479 AbstractCegarLoop]: Abstraction has 96439 states and 142367 transitions. [2020-10-13 14:50:28,300 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:50:28,300 INFO L276 IsEmpty]: Start isEmpty. Operand 96439 states and 142367 transitions. [2020-10-13 14:50:28,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-13 14:50:28,309 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:50:28,309 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 14:50:28,309 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 14:50:28,310 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:50:28,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:50:28,310 INFO L82 PathProgramCache]: Analyzing trace with hash 1903366390, now seen corresponding path program 1 times [2020-10-13 14:50:28,310 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:50:28,310 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [811232228] [2020-10-13 14:50:28,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:50:28,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:50:28,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:50:28,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:50:28,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:50:30,183 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:50:30,183 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-13 14:50:30,183 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 14:50:30,184 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1850 [2020-10-13 14:50:30,184 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:50:30,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:50:30,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 60 [2020-10-13 14:50:30,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-13 14:50:30,184 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:50:30,352 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 145 [2020-10-13 14:50:30,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:50:30,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:50:30,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:50:30,361 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:50:30,362 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:50:30,362 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:50:30,362 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 14:50:30,362 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:50:30,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:50:30,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:50:30,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:50:30,362 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:50:30,372 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 14:50:30,373 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [811232228] [2020-10-13 14:50:30,373 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:50:30,373 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:50:30,373 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999820444] [2020-10-13 14:50:30,374 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:50:30,374 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:50:30,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:50:30,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:50:30,374 INFO L87 Difference]: Start difference. First operand 96439 states and 142367 transitions. Second operand 4 states. [2020-10-13 14:50:30,555 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 149