/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=BIGGEST --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.5.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 19:39:26,451 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 19:39:26,454 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 19:39:26,497 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 19:39:26,497 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 19:39:26,509 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 19:39:26,510 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 19:39:26,513 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 19:39:26,516 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 19:39:26,518 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 19:39:26,519 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 19:39:26,521 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 19:39:26,522 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 19:39:26,523 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 19:39:26,527 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 19:39:26,528 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 19:39:26,529 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 19:39:26,530 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 19:39:26,533 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 19:39:26,540 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 19:39:26,541 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 19:39:26,542 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 19:39:26,547 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 19:39:26,548 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 19:39:26,551 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 19:39:26,551 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 19:39:26,551 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 19:39:26,554 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 19:39:26,554 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 19:39:26,558 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 19:39:26,558 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 19:39:26,559 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 19:39:26,560 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 19:39:26,560 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 19:39:26,562 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 19:39:26,562 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 19:39:26,563 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 19:39:26,563 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 19:39:26,564 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 19:39:26,564 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 19:39:26,566 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 19:39:26,567 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 [2020-10-12 19:39:26,609 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 19:39:26,610 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 19:39:26,612 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 19:39:26,612 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 19:39:26,612 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 19:39:26,612 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 19:39:26,613 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 19:39:26,613 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 19:39:26,613 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 19:39:26,613 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 19:39:26,614 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 19:39:26,615 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 19:39:26,615 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 19:39:26,615 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 19:39:26,616 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 19:39:26,616 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 19:39:26,616 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 19:39:26,616 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 19:39:26,616 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 19:39:26,616 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 19:39:26,617 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 19:39:26,617 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 19:39:26,617 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 19:39:26,617 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 19:39:26,617 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 19:39:26,618 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 19:39:26,618 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 19:39:26,618 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 19:39:26,618 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 19:39:26,618 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=BIGGEST;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=BIGGEST;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=BIGGEST;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=BIGGEST;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=BIGGEST;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=BIGGEST;log-additional-information=true;unknown-allowed=true; [2020-10-12 19:39:26,900 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 19:39:26,913 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 19:39:26,917 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 19:39:26,918 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 19:39:26,919 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 19:39:26,920 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.5.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-12 19:39:26,998 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/76ff49145/ac3edea1af444ce0bc53148bd1c4fb07/FLAGc49f0ee6c [2020-10-12 19:39:27,537 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 19:39:27,538 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr.5.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-12 19:39:27,549 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/76ff49145/ac3edea1af444ce0bc53148bd1c4fb07/FLAGc49f0ee6c [2020-10-12 19:39:27,888 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/76ff49145/ac3edea1af444ce0bc53148bd1c4fb07 [2020-10-12 19:39:27,895 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 19:39:27,897 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 19:39:27,898 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 19:39:27,898 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 19:39:27,901 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 19:39:27,902 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 07:39:27" (1/1) ... [2020-10-12 19:39:27,905 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@683cf205 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:39:27, skipping insertion in model container [2020-10-12 19:39:27,905 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 07:39:27" (1/1) ... [2020-10-12 19:39:27,915 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 19:39:27,983 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 19:39:28,245 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 19:39:28,259 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 19:39:28,409 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 19:39:28,431 INFO L208 MainTranslator]: Completed translation [2020-10-12 19:39:28,432 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:39:28 WrapperNode [2020-10-12 19:39:28,432 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 19:39:28,433 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 19:39:28,433 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 19:39:28,433 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 19:39:28,444 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:39:28" (1/1) ... [2020-10-12 19:39:28,444 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:39:28" (1/1) ... [2020-10-12 19:39:28,455 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:39:28" (1/1) ... [2020-10-12 19:39:28,456 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:39:28" (1/1) ... [2020-10-12 19:39:28,468 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:39:28" (1/1) ... [2020-10-12 19:39:28,477 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:39:28" (1/1) ... [2020-10-12 19:39:28,481 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:39:28" (1/1) ... [2020-10-12 19:39:28,485 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 19:39:28,486 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 19:39:28,486 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 19:39:28,486 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 19:39:28,487 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:39:28" (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 [2020-10-12 19:39:28,562 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 19:39:28,562 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 19:39:28,562 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-12 19:39:28,562 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 19:39:28,563 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 19:39:28,563 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-12 19:39:28,563 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-12 19:39:28,564 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-12 19:39:28,564 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-12 19:39:28,565 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-12 19:39:28,565 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-12 19:39:28,565 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-12 19:39:28,565 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-12 19:39:28,565 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-12 19:39:28,565 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-12 19:39:28,566 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-12 19:39:28,566 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-12 19:39:28,567 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-10-12 19:39:28,567 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-12 19:39:28,567 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-12 19:39:28,567 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 19:39:28,567 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 19:39:28,568 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 19:39:29,210 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 19:39:29,210 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-12 19:39:29,216 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 07:39:29 BoogieIcfgContainer [2020-10-12 19:39:29,216 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 19:39:29,218 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 19:39:29,218 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 19:39:29,221 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 19:39:29,222 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 07:39:27" (1/3) ... [2020-10-12 19:39:29,223 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@351f4f1e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 07:39:29, skipping insertion in model container [2020-10-12 19:39:29,223 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 07:39:28" (2/3) ... [2020-10-12 19:39:29,223 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@351f4f1e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 07:39:29, skipping insertion in model container [2020-10-12 19:39:29,224 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 07:39:29" (3/3) ... [2020-10-12 19:39:29,226 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_lcr.5.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-12 19:39:29,238 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 19:39:29,247 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 19:39:29,263 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 19:39:29,291 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 19:39:29,292 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 19:39:29,292 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 19:39:29,292 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 19:39:29,292 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 19:39:29,293 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 19:39:29,293 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 19:39:29,293 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 19:39:29,319 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states. [2020-10-12 19:39:29,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-12 19:39:29,330 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:39:29,331 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:39:29,332 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:39:29,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:39:29,340 INFO L82 PathProgramCache]: Analyzing trace with hash 820544625, now seen corresponding path program 1 times [2020-10-12 19:39:29,349 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:39:29,350 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2108592806] [2020-10-12 19:39:29,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:39:29,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:39:29,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:39:29,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:39:30,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:39:30,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:39:30,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:39:32,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:39:34,695 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:39:34,696 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-12 19:39:34,696 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 19:39:34,697 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-12 19:39:34,702 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:39:34,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 19:39:34,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 19:39:34,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-12 19:39:34,705 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 7 [2020-10-12 19:39:35,186 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-12 19:39:35,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:39:35,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:39:35,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:39:35,205 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:39:35,206 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:39:35,206 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:39:35,206 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-12 19:39:35,207 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:39:35,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:39:35,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:39:35,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:39:35,207 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:39:35,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:39:35,233 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2108592806] [2020-10-12 19:39:35,235 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:39:35,235 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-12 19:39:35,236 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976579005] [2020-10-12 19:39:35,241 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 19:39:35,242 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:39:35,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 19:39:35,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-12 19:39:35,260 INFO L87 Difference]: Start difference. First operand 104 states. Second operand 8 states. [2020-10-12 19:39:35,603 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification that was a NOOP. DAG size: 137 [2020-10-12 19:39:36,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:39:36,613 INFO L93 Difference]: Finished difference Result 748 states and 1180 transitions. [2020-10-12 19:39:36,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 19:39:36,615 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 64 [2020-10-12 19:39:36,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:39:36,664 INFO L225 Difference]: With dead ends: 748 [2020-10-12 19:39:36,664 INFO L226 Difference]: Without dead ends: 658 [2020-10-12 19:39:36,672 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2020-10-12 19:39:36,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 658 states. [2020-10-12 19:39:36,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 658 to 160. [2020-10-12 19:39:36,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-10-12 19:39:36,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 231 transitions. [2020-10-12 19:39:36,796 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 231 transitions. Word has length 64 [2020-10-12 19:39:36,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:39:36,798 INFO L479 AbstractCegarLoop]: Abstraction has 160 states and 231 transitions. [2020-10-12 19:39:36,798 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 19:39:36,798 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 231 transitions. [2020-10-12 19:39:36,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-12 19:39:36,807 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:39:36,807 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:39:36,808 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 19:39:36,809 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:39:36,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:39:36,810 INFO L82 PathProgramCache]: Analyzing trace with hash 1448175536, now seen corresponding path program 1 times [2020-10-12 19:39:36,810 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:39:36,811 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1873757097] [2020-10-12 19:39:36,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:39:36,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:39:36,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:39:37,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:39:37,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:39:37,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:39:37,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:39:37,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:39:37,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:39:37,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:39:41,919 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:39:41,920 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-12 19:39:41,920 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 19:39:41,920 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-12 19:39:41,920 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:39:41,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 19:39:41,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-12 19:39:41,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-12 19:39:41,921 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:39:42,228 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-12 19:39:42,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:39:42,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:39:42,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:39:42,258 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:39:42,260 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:39:42,261 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:39:42,261 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-12 19:39:42,261 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:39:42,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:39:42,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:39:42,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:39:42,262 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:39:42,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:39:42,302 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1873757097] [2020-10-12 19:39:42,302 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:39:42,302 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-12 19:39:42,302 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970256902] [2020-10-12 19:39:42,305 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 19:39:42,306 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:39:42,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 19:39:42,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-12 19:39:42,307 INFO L87 Difference]: Start difference. First operand 160 states and 231 transitions. Second operand 8 states. [2020-10-12 19:39:42,490 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 128 [2020-10-12 19:39:43,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:39:43,221 INFO L93 Difference]: Finished difference Result 768 states and 1184 transitions. [2020-10-12 19:39:43,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 19:39:43,222 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 66 [2020-10-12 19:39:43,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:39:43,227 INFO L225 Difference]: With dead ends: 768 [2020-10-12 19:39:43,227 INFO L226 Difference]: Without dead ends: 646 [2020-10-12 19:39:43,230 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-10-12 19:39:43,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 646 states. [2020-10-12 19:39:43,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 646 to 170. [2020-10-12 19:39:43,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2020-10-12 19:39:43,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 246 transitions. [2020-10-12 19:39:43,273 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 246 transitions. Word has length 66 [2020-10-12 19:39:43,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:39:43,273 INFO L479 AbstractCegarLoop]: Abstraction has 170 states and 246 transitions. [2020-10-12 19:39:43,273 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 19:39:43,273 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 246 transitions. [2020-10-12 19:39:43,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-12 19:39:43,281 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:39:43,281 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:39:43,281 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 19:39:43,282 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:39:43,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:39:43,282 INFO L82 PathProgramCache]: Analyzing trace with hash -538162814, now seen corresponding path program 1 times [2020-10-12 19:39:43,282 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:39:43,283 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1094781757] [2020-10-12 19:39:43,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:39:43,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:39:43,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:39:43,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:39:43,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:39:43,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:39:43,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:39:43,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:39:45,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:39:45,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:39:45,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:39:48,314 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:39:48,315 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-12 19:39:48,315 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-12 19:39:48,316 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-12 19:39:48,316 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:39:48,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 19:39:48,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 19:39:48,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-12 19:39:48,317 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:39:48,546 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-12 19:39:48,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:39:48,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:39:48,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:39:48,565 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:39:48,566 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:39:48,566 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:39:48,566 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-12 19:39:48,566 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:39:48,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:39:48,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:39:48,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:39:48,567 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 19:39:48,586 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:39:48,586 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1094781757] [2020-10-12 19:39:48,586 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:39:48,587 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-12 19:39:48,587 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126317310] [2020-10-12 19:39:48,587 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 19:39:48,588 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:39:48,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 19:39:48,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-12 19:39:48,588 INFO L87 Difference]: Start difference. First operand 170 states and 246 transitions. Second operand 8 states. [2020-10-12 19:39:48,796 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2020-10-12 19:39:49,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:39:49,308 INFO L93 Difference]: Finished difference Result 1012 states and 1571 transitions. [2020-10-12 19:39:49,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 19:39:49,308 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 66 [2020-10-12 19:39:49,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:39:49,314 INFO L225 Difference]: With dead ends: 1012 [2020-10-12 19:39:49,314 INFO L226 Difference]: Without dead ends: 890 [2020-10-12 19:39:49,316 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2020-10-12 19:39:49,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 890 states. [2020-10-12 19:39:49,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 890 to 346. [2020-10-12 19:39:49,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 346 states. [2020-10-12 19:39:49,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 525 transitions. [2020-10-12 19:39:49,348 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 525 transitions. Word has length 66 [2020-10-12 19:39:49,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:39:49,349 INFO L479 AbstractCegarLoop]: Abstraction has 346 states and 525 transitions. [2020-10-12 19:39:49,349 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 19:39:49,349 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 525 transitions. [2020-10-12 19:39:49,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-12 19:39:49,350 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:39:49,351 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:39:49,351 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-12 19:39:49,351 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:39:49,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:39:49,352 INFO L82 PathProgramCache]: Analyzing trace with hash 1671177964, now seen corresponding path program 1 times [2020-10-12 19:39:49,352 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:39:49,352 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1534046372] [2020-10-12 19:39:49,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:39:49,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:39:49,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:39:49,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:39:49,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:39:49,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:39:49,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:39:50,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:39:50,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:39:50,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:39:54,380 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:39:54,380 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-12 19:39:54,381 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 19:39:54,381 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-12 19:39:54,381 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:39:54,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 19:39:54,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:39:54,382 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-12 19:39:54,382 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 19:39:54,580 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-12 19:39:54,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:39:54,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:39:54,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:39:54,610 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:39:54,610 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:39:54,610 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:39:54,611 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-12 19:39:54,611 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:39:54,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:39:54,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:39:54,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:39:54,612 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:39:54,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:39:54,629 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1534046372] [2020-10-12 19:39:54,629 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:39:54,629 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 19:39:54,629 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096377283] [2020-10-12 19:39:54,630 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 19:39:54,630 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:39:54,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 19:39:54,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-12 19:39:54,631 INFO L87 Difference]: Start difference. First operand 346 states and 525 transitions. Second operand 6 states. [2020-10-12 19:39:54,786 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-12 19:39:55,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:39:55,180 INFO L93 Difference]: Finished difference Result 937 states and 1459 transitions. [2020-10-12 19:39:55,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 19:39:55,181 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 66 [2020-10-12 19:39:55,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:39:55,185 INFO L225 Difference]: With dead ends: 937 [2020-10-12 19:39:55,185 INFO L226 Difference]: Without dead ends: 632 [2020-10-12 19:39:55,187 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 [2020-10-12 19:39:55,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 632 states. [2020-10-12 19:39:55,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 632 to 627. [2020-10-12 19:39:55,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 627 states. [2020-10-12 19:39:55,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 627 states to 627 states and 966 transitions. [2020-10-12 19:39:55,248 INFO L78 Accepts]: Start accepts. Automaton has 627 states and 966 transitions. Word has length 66 [2020-10-12 19:39:55,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:39:55,249 INFO L479 AbstractCegarLoop]: Abstraction has 627 states and 966 transitions. [2020-10-12 19:39:55,249 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 19:39:55,249 INFO L276 IsEmpty]: Start isEmpty. Operand 627 states and 966 transitions. [2020-10-12 19:39:55,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-12 19:39:55,250 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:39:55,250 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:39:55,250 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-12 19:39:55,251 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:39:55,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:39:55,251 INFO L82 PathProgramCache]: Analyzing trace with hash 685311829, now seen corresponding path program 1 times [2020-10-12 19:39:55,251 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:39:55,252 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [924592851] [2020-10-12 19:39:55,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:39:55,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:39:55,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:39:55,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:39:55,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:39:55,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:39:55,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:39:55,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:39:56,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:39:58,824 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:39:58,824 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-12 19:39:58,825 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 19:39:58,825 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3551 [2020-10-12 19:39:58,825 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:39:58,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 19:39:58,825 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 19:39:58,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-12 19:39:58,826 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:39:58,996 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-12 19:39:58,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:39:59,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:39:59,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:39:59,014 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:39:59,015 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:39:59,015 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:39:59,015 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-12 19:39:59,015 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:39:59,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:39:59,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:39:59,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:39:59,016 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:39:59,036 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:39:59,037 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [924592851] [2020-10-12 19:39:59,037 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:39:59,037 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-12 19:39:59,038 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399844000] [2020-10-12 19:39:59,039 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 19:39:59,039 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:39:59,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 19:39:59,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-12 19:39:59,040 INFO L87 Difference]: Start difference. First operand 627 states and 966 transitions. Second operand 8 states. [2020-10-12 19:39:59,292 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2020-10-12 19:40:00,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:40:00,341 INFO L93 Difference]: Finished difference Result 2567 states and 4003 transitions. [2020-10-12 19:40:00,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 19:40:00,342 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 66 [2020-10-12 19:40:00,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:40:00,356 INFO L225 Difference]: With dead ends: 2567 [2020-10-12 19:40:00,356 INFO L226 Difference]: Without dead ends: 2216 [2020-10-12 19:40:00,358 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2020-10-12 19:40:00,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2216 states. [2020-10-12 19:40:00,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2216 to 984. [2020-10-12 19:40:00,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 984 states. [2020-10-12 19:40:00,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 984 states to 984 states and 1529 transitions. [2020-10-12 19:40:00,469 INFO L78 Accepts]: Start accepts. Automaton has 984 states and 1529 transitions. Word has length 66 [2020-10-12 19:40:00,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:40:00,471 INFO L479 AbstractCegarLoop]: Abstraction has 984 states and 1529 transitions. [2020-10-12 19:40:00,471 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 19:40:00,471 INFO L276 IsEmpty]: Start isEmpty. Operand 984 states and 1529 transitions. [2020-10-12 19:40:00,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-12 19:40:00,472 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:40:00,473 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:40:00,473 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-12 19:40:00,473 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:40:00,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:40:00,474 INFO L82 PathProgramCache]: Analyzing trace with hash 908314257, now seen corresponding path program 1 times [2020-10-12 19:40:00,474 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:40:00,475 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1714883738] [2020-10-12 19:40:00,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:40:00,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:40:00,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:40:00,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:40:00,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:40:00,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:40:00,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:40:00,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:40:00,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:40:01,650 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:40:01,650 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-12 19:40:01,650 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 19:40:01,651 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1152 [2020-10-12 19:40:01,651 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:40:01,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 19:40:01,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 68 [2020-10-12 19:40:01,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-12 19:40:01,651 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:40:01,798 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-12 19:40:01,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:40:01,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:40:01,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:40:01,812 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:40:01,812 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:40:01,812 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:40:01,812 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-12 19:40:01,813 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:40:01,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:40:01,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:40:01,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:40:01,813 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:40:01,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:40:01,827 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1714883738] [2020-10-12 19:40:01,828 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:40:01,828 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 19:40:01,828 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065884010] [2020-10-12 19:40:01,828 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 19:40:01,829 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:40:01,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 19:40:01,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-12 19:40:01,830 INFO L87 Difference]: Start difference. First operand 984 states and 1529 transitions. Second operand 5 states. [2020-10-12 19:40:02,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:40:02,599 INFO L93 Difference]: Finished difference Result 1935 states and 3011 transitions. [2020-10-12 19:40:02,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-12 19:40:02,600 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 66 [2020-10-12 19:40:02,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:40:02,610 INFO L225 Difference]: With dead ends: 1935 [2020-10-12 19:40:02,610 INFO L226 Difference]: Without dead ends: 1933 [2020-10-12 19:40:02,611 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-12 19:40:02,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1933 states. [2020-10-12 19:40:02,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1933 to 1012. [2020-10-12 19:40:02,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1012 states. [2020-10-12 19:40:02,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1012 states to 1012 states and 1557 transitions. [2020-10-12 19:40:02,735 INFO L78 Accepts]: Start accepts. Automaton has 1012 states and 1557 transitions. Word has length 66 [2020-10-12 19:40:02,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:40:02,735 INFO L479 AbstractCegarLoop]: Abstraction has 1012 states and 1557 transitions. [2020-10-12 19:40:02,735 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 19:40:02,736 INFO L276 IsEmpty]: Start isEmpty. Operand 1012 states and 1557 transitions. [2020-10-12 19:40:02,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-12 19:40:02,737 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:40:02,737 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:40:02,740 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-12 19:40:02,740 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:40:02,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:40:02,741 INFO L82 PathProgramCache]: Analyzing trace with hash 928363600, now seen corresponding path program 1 times [2020-10-12 19:40:02,741 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:40:02,741 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1258913429] [2020-10-12 19:40:02,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:40:02,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:40:02,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:40:02,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:40:02,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:40:02,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:40:03,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:40:04,313 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:40:04,313 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-12 19:40:04,314 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 19:40:04,314 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1554 [2020-10-12 19:40:04,314 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:40:04,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 19:40:04,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 19:40:04,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-12 19:40:04,315 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:40:04,522 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-12 19:40:04,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:40:04,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:40:04,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:40:04,539 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:40:04,540 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:40:04,540 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:40:04,540 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-12 19:40:04,540 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:40:04,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:40:04,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:40:04,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:40:04,541 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:40:04,562 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:40:04,563 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1258913429] [2020-10-12 19:40:04,563 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:40:04,563 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-12 19:40:04,565 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957126234] [2020-10-12 19:40:04,566 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 19:40:04,566 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:40:04,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 19:40:04,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-12 19:40:04,567 INFO L87 Difference]: Start difference. First operand 1012 states and 1557 transitions. Second operand 8 states. [2020-10-12 19:40:04,823 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2020-10-12 19:40:05,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:40:05,627 INFO L93 Difference]: Finished difference Result 3075 states and 4762 transitions. [2020-10-12 19:40:05,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 19:40:05,627 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 66 [2020-10-12 19:40:05,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:40:05,640 INFO L225 Difference]: With dead ends: 3075 [2020-10-12 19:40:05,640 INFO L226 Difference]: Without dead ends: 2101 [2020-10-12 19:40:05,644 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2020-10-12 19:40:05,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2101 states. [2020-10-12 19:40:05,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2101 to 1012. [2020-10-12 19:40:05,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1012 states. [2020-10-12 19:40:05,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1012 states to 1012 states and 1549 transitions. [2020-10-12 19:40:05,781 INFO L78 Accepts]: Start accepts. Automaton has 1012 states and 1549 transitions. Word has length 66 [2020-10-12 19:40:05,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:40:05,782 INFO L479 AbstractCegarLoop]: Abstraction has 1012 states and 1549 transitions. [2020-10-12 19:40:05,782 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 19:40:05,782 INFO L276 IsEmpty]: Start isEmpty. Operand 1012 states and 1549 transitions. [2020-10-12 19:40:05,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-12 19:40:05,783 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:40:05,783 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:40:05,784 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-12 19:40:05,784 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:40:05,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:40:05,784 INFO L82 PathProgramCache]: Analyzing trace with hash -1324771743, now seen corresponding path program 1 times [2020-10-12 19:40:05,784 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:40:05,785 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1323544999] [2020-10-12 19:40:05,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:40:05,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:40:05,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:40:05,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:40:05,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:40:05,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:40:05,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:40:06,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:40:06,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:40:08,825 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:40:08,826 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-12 19:40:08,826 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 19:40:08,826 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3023 [2020-10-12 19:40:08,826 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:40:08,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 19:40:08,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 19:40:08,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-12 19:40:08,827 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:40:08,994 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-12 19:40:08,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:40:08,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:40:09,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:40:09,006 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:40:09,006 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:40:09,007 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:40:09,007 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-12 19:40:09,007 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:40:09,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:40:09,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:40:09,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:40:09,007 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:40:09,022 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:40:09,022 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1323544999] [2020-10-12 19:40:09,022 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:40:09,022 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-12 19:40:09,023 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097628015] [2020-10-12 19:40:09,023 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 19:40:09,024 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:40:09,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 19:40:09,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-12 19:40:09,024 INFO L87 Difference]: Start difference. First operand 1012 states and 1549 transitions. Second operand 8 states. [2020-10-12 19:40:09,218 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2020-10-12 19:40:10,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:40:10,188 INFO L93 Difference]: Finished difference Result 2899 states and 4467 transitions. [2020-10-12 19:40:10,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 19:40:10,188 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 66 [2020-10-12 19:40:10,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:40:10,204 INFO L225 Difference]: With dead ends: 2899 [2020-10-12 19:40:10,205 INFO L226 Difference]: Without dead ends: 2540 [2020-10-12 19:40:10,211 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2020-10-12 19:40:10,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2540 states. [2020-10-12 19:40:10,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2540 to 1258. [2020-10-12 19:40:10,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1258 states. [2020-10-12 19:40:10,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1258 states to 1258 states and 1931 transitions. [2020-10-12 19:40:10,377 INFO L78 Accepts]: Start accepts. Automaton has 1258 states and 1931 transitions. Word has length 66 [2020-10-12 19:40:10,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:40:10,378 INFO L479 AbstractCegarLoop]: Abstraction has 1258 states and 1931 transitions. [2020-10-12 19:40:10,378 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 19:40:10,378 INFO L276 IsEmpty]: Start isEmpty. Operand 1258 states and 1931 transitions. [2020-10-12 19:40:10,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-12 19:40:10,380 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:40:10,380 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:40:10,380 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-12 19:40:10,380 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:40:10,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:40:10,381 INFO L82 PathProgramCache]: Analyzing trace with hash -1697297637, now seen corresponding path program 1 times [2020-10-12 19:40:10,381 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:40:10,382 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [875680006] [2020-10-12 19:40:10,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:40:10,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:40:10,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:40:10,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:40:10,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:40:10,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:40:10,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:40:10,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:40:11,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:40:13,209 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:40:13,209 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-12 19:40:13,209 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 19:40:13,210 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2806 [2020-10-12 19:40:13,210 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:40:13,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 19:40:13,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-12 19:40:13,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-12 19:40:13,211 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:40:13,376 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-12 19:40:13,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:40:13,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:40:13,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:40:13,388 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:40:13,388 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:40:13,388 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:40:13,389 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 19:40:13,389 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:40:13,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:40:13,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:40:13,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:40:13,389 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:40:13,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:40:13,407 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [875680006] [2020-10-12 19:40:13,407 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:40:13,407 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-12 19:40:13,408 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120135483] [2020-10-12 19:40:13,408 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 19:40:13,409 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:40:13,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 19:40:13,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-12 19:40:13,409 INFO L87 Difference]: Start difference. First operand 1258 states and 1931 transitions. Second operand 8 states. [2020-10-12 19:40:13,608 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2020-10-12 19:40:14,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:40:14,610 INFO L93 Difference]: Finished difference Result 3191 states and 4919 transitions. [2020-10-12 19:40:14,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 19:40:14,611 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 66 [2020-10-12 19:40:14,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:40:14,629 INFO L225 Difference]: With dead ends: 3191 [2020-10-12 19:40:14,630 INFO L226 Difference]: Without dead ends: 2832 [2020-10-12 19:40:14,636 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2020-10-12 19:40:14,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2832 states. [2020-10-12 19:40:14,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2832 to 1504. [2020-10-12 19:40:14,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1504 states. [2020-10-12 19:40:14,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1504 states to 1504 states and 2313 transitions. [2020-10-12 19:40:14,826 INFO L78 Accepts]: Start accepts. Automaton has 1504 states and 2313 transitions. Word has length 66 [2020-10-12 19:40:14,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:40:14,826 INFO L479 AbstractCegarLoop]: Abstraction has 1504 states and 2313 transitions. [2020-10-12 19:40:14,826 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 19:40:14,827 INFO L276 IsEmpty]: Start isEmpty. Operand 1504 states and 2313 transitions. [2020-10-12 19:40:14,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-12 19:40:14,828 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:40:14,828 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:40:14,828 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-12 19:40:14,829 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:40:14,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:40:14,829 INFO L82 PathProgramCache]: Analyzing trace with hash -1897409334, now seen corresponding path program 1 times [2020-10-12 19:40:14,829 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:40:14,829 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [858475118] [2020-10-12 19:40:14,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:40:14,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:40:14,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:40:14,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:40:14,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:40:15,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:40:15,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:40:15,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:40:15,529 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:40:15,529 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-12 19:40:15,529 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 19:40:15,530 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 679 [2020-10-12 19:40:15,530 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:40:15,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:40:15,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-12 19:40:15,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-12 19:40:15,530 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:40:15,672 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-12 19:40:15,674 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:40:15,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:40:15,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:40:15,683 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:40:15,684 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:40:15,684 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:40:15,684 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 19:40:15,684 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:40:15,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:40:15,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:40:15,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:40:15,685 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:40:15,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:40:15,700 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [858475118] [2020-10-12 19:40:15,701 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:40:15,701 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-12 19:40:15,701 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407641305] [2020-10-12 19:40:15,702 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-12 19:40:15,702 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:40:15,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-12 19:40:15,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-12 19:40:15,702 INFO L87 Difference]: Start difference. First operand 1504 states and 2313 transitions. Second operand 4 states. [2020-10-12 19:40:15,857 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2020-10-12 19:40:16,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:40:16,509 INFO L93 Difference]: Finished difference Result 4244 states and 6551 transitions. [2020-10-12 19:40:16,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 19:40:16,510 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 67 [2020-10-12 19:40:16,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:40:16,523 INFO L225 Difference]: With dead ends: 4244 [2020-10-12 19:40:16,523 INFO L226 Difference]: Without dead ends: 2778 [2020-10-12 19:40:16,527 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-12 19:40:16,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2778 states. [2020-10-12 19:40:16,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2778 to 2776. [2020-10-12 19:40:16,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2776 states. [2020-10-12 19:40:16,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2776 states to 2776 states and 4251 transitions. [2020-10-12 19:40:16,850 INFO L78 Accepts]: Start accepts. Automaton has 2776 states and 4251 transitions. Word has length 67 [2020-10-12 19:40:16,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:40:16,850 INFO L479 AbstractCegarLoop]: Abstraction has 2776 states and 4251 transitions. [2020-10-12 19:40:16,850 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-12 19:40:16,850 INFO L276 IsEmpty]: Start isEmpty. Operand 2776 states and 4251 transitions. [2020-10-12 19:40:16,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-12 19:40:16,852 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:40:16,852 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:40:16,852 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-12 19:40:16,852 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:40:16,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:40:16,853 INFO L82 PathProgramCache]: Analyzing trace with hash 719004060, now seen corresponding path program 1 times [2020-10-12 19:40:16,853 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:40:16,853 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [413877588] [2020-10-12 19:40:16,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:40:16,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:40:16,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:40:16,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:40:16,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:40:17,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:40:17,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:40:17,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:40:18,276 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:40:18,276 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-12 19:40:18,276 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 19:40:18,277 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1403 [2020-10-12 19:40:18,277 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:40:18,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 19:40:18,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:40:18,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-12 19:40:18,277 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:40:18,425 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-12 19:40:18,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:40:18,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:40:18,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:40:18,445 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:40:18,446 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:40:18,446 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:40:18,446 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-12 19:40:18,446 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:40:18,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:40:18,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:40:18,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:40:18,447 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:40:18,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:40:18,461 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [413877588] [2020-10-12 19:40:18,461 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:40:18,461 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 19:40:18,462 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683090348] [2020-10-12 19:40:18,462 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 19:40:18,462 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:40:18,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 19:40:18,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-12 19:40:18,463 INFO L87 Difference]: Start difference. First operand 2776 states and 4251 transitions. Second operand 6 states. [2020-10-12 19:40:18,637 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 133 [2020-10-12 19:40:19,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:40:19,200 INFO L93 Difference]: Finished difference Result 5514 states and 8464 transitions. [2020-10-12 19:40:19,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 19:40:19,200 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 68 [2020-10-12 19:40:19,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:40:19,214 INFO L225 Difference]: With dead ends: 5514 [2020-10-12 19:40:19,214 INFO L226 Difference]: Without dead ends: 2776 [2020-10-12 19:40:19,221 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-12 19:40:19,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2776 states. [2020-10-12 19:40:19,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2776 to 2776. [2020-10-12 19:40:19,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2776 states. [2020-10-12 19:40:19,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2776 states to 2776 states and 4227 transitions. [2020-10-12 19:40:19,530 INFO L78 Accepts]: Start accepts. Automaton has 2776 states and 4227 transitions. Word has length 68 [2020-10-12 19:40:19,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:40:19,530 INFO L479 AbstractCegarLoop]: Abstraction has 2776 states and 4227 transitions. [2020-10-12 19:40:19,530 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 19:40:19,530 INFO L276 IsEmpty]: Start isEmpty. Operand 2776 states and 4227 transitions. [2020-10-12 19:40:19,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-12 19:40:19,532 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:40:19,532 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:40:19,532 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-12 19:40:19,532 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:40:19,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:40:19,533 INFO L82 PathProgramCache]: Analyzing trace with hash 54187799, now seen corresponding path program 1 times [2020-10-12 19:40:19,533 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:40:19,533 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1452358977] [2020-10-12 19:40:19,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:40:19,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:40:19,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:40:19,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:40:19,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:40:19,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:40:19,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:40:19,889 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:40:19,889 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-12 19:40:19,889 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 19:40:19,889 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 338 [2020-10-12 19:40:19,889 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:40:19,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:40:19,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 19:40:19,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-12 19:40:19,890 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:40:20,021 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-12 19:40:20,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:40:20,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:40:20,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:40:20,036 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:40:20,036 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:40:20,037 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:40:20,037 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-12 19:40:20,037 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:40:20,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:40:20,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:40:20,038 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:40:20,038 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:40:20,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:40:20,050 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1452358977] [2020-10-12 19:40:20,050 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:40:20,050 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-12 19:40:20,051 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894258929] [2020-10-12 19:40:20,051 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-12 19:40:20,051 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:40:20,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-12 19:40:20,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-12 19:40:20,052 INFO L87 Difference]: Start difference. First operand 2776 states and 4227 transitions. Second operand 4 states. [2020-10-12 19:40:20,195 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 131 [2020-10-12 19:40:20,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:40:20,882 INFO L93 Difference]: Finished difference Result 6724 states and 10247 transitions. [2020-10-12 19:40:20,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 19:40:20,883 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 68 [2020-10-12 19:40:20,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:40:20,900 INFO L225 Difference]: With dead ends: 6724 [2020-10-12 19:40:20,901 INFO L226 Difference]: Without dead ends: 3986 [2020-10-12 19:40:20,908 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-12 19:40:20,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3986 states. [2020-10-12 19:40:21,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3986 to 3960. [2020-10-12 19:40:21,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3960 states. [2020-10-12 19:40:21,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3960 states to 3960 states and 5975 transitions. [2020-10-12 19:40:21,239 INFO L78 Accepts]: Start accepts. Automaton has 3960 states and 5975 transitions. Word has length 68 [2020-10-12 19:40:21,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:40:21,240 INFO L479 AbstractCegarLoop]: Abstraction has 3960 states and 5975 transitions. [2020-10-12 19:40:21,240 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-12 19:40:21,240 INFO L276 IsEmpty]: Start isEmpty. Operand 3960 states and 5975 transitions. [2020-10-12 19:40:21,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-12 19:40:21,242 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:40:21,242 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:40:21,242 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-12 19:40:21,242 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:40:21,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:40:21,243 INFO L82 PathProgramCache]: Analyzing trace with hash 1519530188, now seen corresponding path program 1 times [2020-10-12 19:40:21,243 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:40:21,243 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1327879869] [2020-10-12 19:40:21,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:40:21,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:40:21,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:40:21,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:40:21,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:40:21,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:40:21,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:40:21,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:40:22,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:40:26,263 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:40:26,263 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-12 19:40:26,263 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 19:40:26,263 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-12 19:40:26,264 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:40:26,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 19:40:26,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-12 19:40:26,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-12 19:40:26,264 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:40:26,420 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-12 19:40:26,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:40:26,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:40:26,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:40:26,430 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:40:26,430 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:40:26,431 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:40:26,431 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 19:40:26,431 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:40:26,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:40:26,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:40:26,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:40:26,431 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:40:26,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:40:26,441 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1327879869] [2020-10-12 19:40:26,441 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:40:26,441 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-12 19:40:26,441 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036234890] [2020-10-12 19:40:26,441 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 19:40:26,441 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:40:26,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 19:40:26,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-12 19:40:26,442 INFO L87 Difference]: Start difference. First operand 3960 states and 5975 transitions. Second operand 8 states. [2020-10-12 19:40:26,620 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2020-10-12 19:40:27,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:40:27,918 INFO L93 Difference]: Finished difference Result 8314 states and 12586 transitions. [2020-10-12 19:40:27,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 19:40:27,918 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 68 [2020-10-12 19:40:27,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:40:27,935 INFO L225 Difference]: With dead ends: 8314 [2020-10-12 19:40:27,935 INFO L226 Difference]: Without dead ends: 7646 [2020-10-12 19:40:27,939 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2020-10-12 19:40:27,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7646 states. [2020-10-12 19:40:28,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7646 to 4420. [2020-10-12 19:40:28,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4420 states. [2020-10-12 19:40:28,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4420 states to 4420 states and 6679 transitions. [2020-10-12 19:40:28,357 INFO L78 Accepts]: Start accepts. Automaton has 4420 states and 6679 transitions. Word has length 68 [2020-10-12 19:40:28,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:40:28,358 INFO L479 AbstractCegarLoop]: Abstraction has 4420 states and 6679 transitions. [2020-10-12 19:40:28,358 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 19:40:28,358 INFO L276 IsEmpty]: Start isEmpty. Operand 4420 states and 6679 transitions. [2020-10-12 19:40:28,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-12 19:40:28,359 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:40:28,360 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:40:28,360 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-12 19:40:28,360 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:40:28,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:40:28,360 INFO L82 PathProgramCache]: Analyzing trace with hash 1726248667, now seen corresponding path program 1 times [2020-10-12 19:40:28,361 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:40:28,361 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1614853817] [2020-10-12 19:40:28,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:40:28,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:40:28,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:40:28,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:40:28,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:40:28,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:40:28,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:40:28,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:40:28,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:40:28,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:40:29,886 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:40:29,886 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-12 19:40:29,886 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 19:40:29,886 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1511 [2020-10-12 19:40:29,887 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:40:29,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 19:40:29,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-10-12 19:40:29,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-12 19:40:29,887 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:40:30,039 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-12 19:40:30,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:40:30,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:40:30,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:40:30,057 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:40:30,057 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:40:30,057 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:40:30,057 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-12 19:40:30,057 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:40:30,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:40:30,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:40:30,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:40:30,058 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:40:30,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:40:30,069 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1614853817] [2020-10-12 19:40:30,070 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:40:30,070 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-12 19:40:30,070 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969834822] [2020-10-12 19:40:30,070 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 19:40:30,071 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:40:30,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 19:40:30,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-12 19:40:30,071 INFO L87 Difference]: Start difference. First operand 4420 states and 6679 transitions. Second operand 8 states. [2020-10-12 19:40:31,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:40:31,535 INFO L93 Difference]: Finished difference Result 9614 states and 14359 transitions. [2020-10-12 19:40:31,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-12 19:40:31,536 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 69 [2020-10-12 19:40:31,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:40:31,557 INFO L225 Difference]: With dead ends: 9614 [2020-10-12 19:40:31,557 INFO L226 Difference]: Without dead ends: 8654 [2020-10-12 19:40:31,563 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-12 19:40:31,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8654 states. [2020-10-12 19:40:32,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8654 to 4566. [2020-10-12 19:40:32,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4566 states. [2020-10-12 19:40:32,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4566 states to 4566 states and 6894 transitions. [2020-10-12 19:40:32,132 INFO L78 Accepts]: Start accepts. Automaton has 4566 states and 6894 transitions. Word has length 69 [2020-10-12 19:40:32,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:40:32,132 INFO L479 AbstractCegarLoop]: Abstraction has 4566 states and 6894 transitions. [2020-10-12 19:40:32,132 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 19:40:32,132 INFO L276 IsEmpty]: Start isEmpty. Operand 4566 states and 6894 transitions. [2020-10-12 19:40:32,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-12 19:40:32,134 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:40:32,134 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] [2020-10-12 19:40:32,134 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-12 19:40:32,135 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:40:32,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:40:32,135 INFO L82 PathProgramCache]: Analyzing trace with hash -339328508, now seen corresponding path program 1 times [2020-10-12 19:40:32,135 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:40:32,135 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1726522677] [2020-10-12 19:40:32,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:40:32,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:40:32,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:40:32,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:40:32,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:40:32,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:40:32,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:40:33,055 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:40:33,055 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-12 19:40:33,056 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 19:40:33,056 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 902 [2020-10-12 19:40:33,056 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:40:33,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 19:40:33,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:40:33,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-12 19:40:33,057 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 19:40:33,353 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-12 19:40:33,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:40:33,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:40:33,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:40:33,385 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:40:33,385 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:40:33,386 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:40:33,386 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-12 19:40:33,386 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:40:33,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:40:33,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:40:33,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:40:33,388 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 19:40:33,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:40:33,422 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1726522677] [2020-10-12 19:40:33,422 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:40:33,422 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 19:40:33,422 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360650457] [2020-10-12 19:40:33,423 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 19:40:33,423 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:40:33,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 19:40:33,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-12 19:40:33,424 INFO L87 Difference]: Start difference. First operand 4566 states and 6894 transitions. Second operand 7 states. [2020-10-12 19:40:33,588 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-10-12 19:40:35,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:40:35,098 INFO L93 Difference]: Finished difference Result 14866 states and 22400 transitions. [2020-10-12 19:40:35,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 19:40:35,099 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 69 [2020-10-12 19:40:35,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:40:35,119 INFO L225 Difference]: With dead ends: 14866 [2020-10-12 19:40:35,119 INFO L226 Difference]: Without dead ends: 10364 [2020-10-12 19:40:35,130 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-12 19:40:35,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10364 states. [2020-10-12 19:40:35,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10364 to 4446. [2020-10-12 19:40:35,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4446 states. [2020-10-12 19:40:35,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4446 states to 4446 states and 6714 transitions. [2020-10-12 19:40:35,696 INFO L78 Accepts]: Start accepts. Automaton has 4446 states and 6714 transitions. Word has length 69 [2020-10-12 19:40:35,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:40:35,696 INFO L479 AbstractCegarLoop]: Abstraction has 4446 states and 6714 transitions. [2020-10-12 19:40:35,697 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 19:40:35,697 INFO L276 IsEmpty]: Start isEmpty. Operand 4446 states and 6714 transitions. [2020-10-12 19:40:35,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-12 19:40:35,698 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:40:35,698 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:40:35,698 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-12 19:40:35,698 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:40:35,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:40:35,698 INFO L82 PathProgramCache]: Analyzing trace with hash -954176716, now seen corresponding path program 1 times [2020-10-12 19:40:35,698 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:40:35,699 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [966427984] [2020-10-12 19:40:35,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:40:35,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:40:35,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:40:35,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:40:35,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:40:35,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:40:35,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:40:36,723 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:40:36,723 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-12 19:40:36,723 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 19:40:36,724 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1007 [2020-10-12 19:40:36,724 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:40:36,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 19:40:36,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:40:36,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-12 19:40:36,724 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:40:36,932 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-12 19:40:36,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:40:36,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:40:36,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:40:36,948 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:40:36,948 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:40:36,948 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:40:36,948 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-12 19:40:36,948 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:40:36,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:40:36,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:40:36,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:40:36,949 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:40:36,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:40:36,966 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [966427984] [2020-10-12 19:40:36,966 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:40:36,966 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 19:40:36,967 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270768232] [2020-10-12 19:40:36,967 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 19:40:36,967 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:40:36,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 19:40:36,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-12 19:40:36,968 INFO L87 Difference]: Start difference. First operand 4446 states and 6714 transitions. Second operand 7 states. [2020-10-12 19:40:37,120 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-10-12 19:40:38,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:40:38,553 INFO L93 Difference]: Finished difference Result 12818 states and 19196 transitions. [2020-10-12 19:40:38,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 19:40:38,553 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 69 [2020-10-12 19:40:38,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:40:38,568 INFO L225 Difference]: With dead ends: 12818 [2020-10-12 19:40:38,568 INFO L226 Difference]: Without dead ends: 8436 [2020-10-12 19:40:38,580 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-12 19:40:38,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8436 states. [2020-10-12 19:40:39,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8436 to 4582. [2020-10-12 19:40:39,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4582 states. [2020-10-12 19:40:39,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4582 states to 4582 states and 6898 transitions. [2020-10-12 19:40:39,208 INFO L78 Accepts]: Start accepts. Automaton has 4582 states and 6898 transitions. Word has length 69 [2020-10-12 19:40:39,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:40:39,209 INFO L479 AbstractCegarLoop]: Abstraction has 4582 states and 6898 transitions. [2020-10-12 19:40:39,209 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 19:40:39,209 INFO L276 IsEmpty]: Start isEmpty. Operand 4582 states and 6898 transitions. [2020-10-12 19:40:39,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-12 19:40:39,210 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:40:39,210 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] [2020-10-12 19:40:39,210 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-12 19:40:39,210 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:40:39,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:40:39,210 INFO L82 PathProgramCache]: Analyzing trace with hash -2028396418, now seen corresponding path program 1 times [2020-10-12 19:40:39,210 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:40:39,211 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1545017423] [2020-10-12 19:40:39,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:40:39,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:40:39,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:40:39,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:40:39,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:40:39,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:40:39,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:40:39,950 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:40:39,950 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-12 19:40:39,950 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 19:40:39,950 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 727 [2020-10-12 19:40:39,951 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:40:39,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 19:40:39,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:40:39,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-12 19:40:39,951 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:40:40,146 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-12 19:40:40,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:40:40,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:40:40,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:40:40,162 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:40:40,163 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:40:40,163 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:40:40,163 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-12 19:40:40,163 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:40:40,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:40:40,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:40:40,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:40:40,163 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:40:40,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:40:40,180 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1545017423] [2020-10-12 19:40:40,180 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:40:40,180 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 19:40:40,180 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772608394] [2020-10-12 19:40:40,181 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 19:40:40,181 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:40:40,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 19:40:40,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-12 19:40:40,181 INFO L87 Difference]: Start difference. First operand 4582 states and 6898 transitions. Second operand 7 states. [2020-10-12 19:40:40,325 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-10-12 19:40:41,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:40:41,895 INFO L93 Difference]: Finished difference Result 14106 states and 21148 transitions. [2020-10-12 19:40:41,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 19:40:41,896 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 69 [2020-10-12 19:40:41,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:40:41,906 INFO L225 Difference]: With dead ends: 14106 [2020-10-12 19:40:41,906 INFO L226 Difference]: Without dead ends: 9636 [2020-10-12 19:40:41,916 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-12 19:40:41,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9636 states. [2020-10-12 19:40:42,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9636 to 4534. [2020-10-12 19:40:42,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4534 states. [2020-10-12 19:40:42,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4534 states to 4534 states and 6830 transitions. [2020-10-12 19:40:42,513 INFO L78 Accepts]: Start accepts. Automaton has 4534 states and 6830 transitions. Word has length 69 [2020-10-12 19:40:42,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:40:42,513 INFO L479 AbstractCegarLoop]: Abstraction has 4534 states and 6830 transitions. [2020-10-12 19:40:42,514 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 19:40:42,514 INFO L276 IsEmpty]: Start isEmpty. Operand 4534 states and 6830 transitions. [2020-10-12 19:40:42,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-12 19:40:42,515 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:40:42,515 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:40:42,515 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-12 19:40:42,515 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:40:42,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:40:42,516 INFO L82 PathProgramCache]: Analyzing trace with hash -121981605, now seen corresponding path program 1 times [2020-10-12 19:40:42,516 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:40:42,516 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1613762281] [2020-10-12 19:40:42,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:40:42,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:40:42,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:40:42,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:40:42,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:40:42,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:40:42,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:40:42,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:40:43,617 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:40:43,617 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-12 19:40:43,617 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 19:40:43,618 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1089 [2020-10-12 19:40:43,618 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:40:43,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 19:40:43,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 19:40:43,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-12 19:40:43,619 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:40:43,795 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-12 19:40:43,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:40:43,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:40:43,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:40:43,804 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:40:43,805 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:40:43,805 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:40:43,805 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 19:40:43,805 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:40:43,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:40:43,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:40:43,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:40:43,805 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:40:43,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:40:43,817 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1613762281] [2020-10-12 19:40:43,817 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:40:43,817 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 19:40:43,817 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409992489] [2020-10-12 19:40:43,817 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 19:40:43,818 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:40:43,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 19:40:43,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-12 19:40:43,818 INFO L87 Difference]: Start difference. First operand 4534 states and 6830 transitions. Second operand 5 states. [2020-10-12 19:40:43,979 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-12 19:40:45,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:40:45,279 INFO L93 Difference]: Finished difference Result 10476 states and 15885 transitions. [2020-10-12 19:40:45,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 19:40:45,279 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 69 [2020-10-12 19:40:45,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:40:45,287 INFO L225 Difference]: With dead ends: 10476 [2020-10-12 19:40:45,287 INFO L226 Difference]: Without dead ends: 7278 [2020-10-12 19:40:45,293 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-12 19:40:45,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7278 states. [2020-10-12 19:40:46,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7278 to 7222. [2020-10-12 19:40:46,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7222 states. [2020-10-12 19:40:46,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7222 states to 7222 states and 10812 transitions. [2020-10-12 19:40:46,185 INFO L78 Accepts]: Start accepts. Automaton has 7222 states and 10812 transitions. Word has length 69 [2020-10-12 19:40:46,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:40:46,186 INFO L479 AbstractCegarLoop]: Abstraction has 7222 states and 10812 transitions. [2020-10-12 19:40:46,186 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 19:40:46,186 INFO L276 IsEmpty]: Start isEmpty. Operand 7222 states and 10812 transitions. [2020-10-12 19:40:46,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-12 19:40:46,187 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:40:46,187 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:40:46,187 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-12 19:40:46,187 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:40:46,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:40:46,187 INFO L82 PathProgramCache]: Analyzing trace with hash -893512122, now seen corresponding path program 1 times [2020-10-12 19:40:46,187 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:40:46,187 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1234331130] [2020-10-12 19:40:46,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:40:46,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:40:46,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:40:46,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:40:46,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:40:46,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:40:46,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:40:46,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:40:48,791 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:40:48,791 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-12 19:40:48,791 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 19:40:48,791 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2589 [2020-10-12 19:40:48,792 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:40:48,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 19:40:48,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:40:48,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-12 19:40:48,792 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:40:48,996 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-12 19:40:48,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:40:49,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:40:49,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:40:49,011 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:40:49,012 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:40:49,012 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:40:49,012 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-12 19:40:49,012 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:40:49,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:40:49,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:40:49,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:40:49,013 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:40:49,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:40:49,029 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1234331130] [2020-10-12 19:40:49,030 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 19:40:49,030 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-12 19:40:49,030 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247013520] [2020-10-12 19:40:49,030 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 19:40:49,030 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:40:49,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 19:40:49,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-12 19:40:49,031 INFO L87 Difference]: Start difference. First operand 7222 states and 10812 transitions. Second operand 7 states. [2020-10-12 19:40:49,172 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-10-12 19:40:51,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:40:51,399 INFO L93 Difference]: Finished difference Result 20818 states and 31411 transitions. [2020-10-12 19:40:51,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 19:40:51,399 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 70 [2020-10-12 19:40:51,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:40:51,415 INFO L225 Difference]: With dead ends: 20818 [2020-10-12 19:40:51,415 INFO L226 Difference]: Without dead ends: 14998 [2020-10-12 19:40:51,424 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-12 19:40:51,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14998 states. [2020-10-12 19:40:52,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14998 to 7168. [2020-10-12 19:40:52,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7168 states. [2020-10-12 19:40:52,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7168 states to 7168 states and 10739 transitions. [2020-10-12 19:40:52,295 INFO L78 Accepts]: Start accepts. Automaton has 7168 states and 10739 transitions. Word has length 70 [2020-10-12 19:40:52,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:40:52,295 INFO L479 AbstractCegarLoop]: Abstraction has 7168 states and 10739 transitions. [2020-10-12 19:40:52,296 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 19:40:52,296 INFO L276 IsEmpty]: Start isEmpty. Operand 7168 states and 10739 transitions. [2020-10-12 19:40:52,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-12 19:40:52,300 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:40:52,300 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:40:52,300 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-12 19:40:52,300 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:40:52,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:40:52,300 INFO L82 PathProgramCache]: Analyzing trace with hash 1586734928, now seen corresponding path program 1 times [2020-10-12 19:40:52,301 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:40:52,301 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [88439342] [2020-10-12 19:40:52,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:40:52,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:40:52,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:40:52,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:40:52,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:40:52,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:40:52,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:40:52,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:40:53,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:40:55,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:40:55,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:40:57,320 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:40:57,320 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-12 19:40:57,320 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-12 19:40:57,320 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-12 19:40:57,321 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:40:57,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 19:40:57,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 19:40:57,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-10-12 19:40:57,321 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:40:57,721 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-12 19:40:57,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:40:57,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:40:57,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:40:57,730 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:40:57,730 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:40:57,731 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:40:57,731 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 19:40:57,731 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:40:57,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:40:57,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:40:57,731 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:40:57,731 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:40:57,765 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 5 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:40:57,765 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [88439342] [2020-10-12 19:40:57,765 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 19:40:57,766 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 19:40:57,766 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532385315] [2020-10-12 19:40:57,766 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 19:40:57,766 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:40:57,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 19:40:57,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-10-12 19:40:57,767 INFO L87 Difference]: Start difference. First operand 7168 states and 10739 transitions. Second operand 10 states. [2020-10-12 19:40:57,935 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 144 [2020-10-12 19:41:06,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:41:06,488 INFO L93 Difference]: Finished difference Result 49742 states and 73662 transitions. [2020-10-12 19:41:06,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-12 19:41:06,488 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 97 [2020-10-12 19:41:06,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:41:06,545 INFO L225 Difference]: With dead ends: 49742 [2020-10-12 19:41:06,545 INFO L226 Difference]: Without dead ends: 47094 [2020-10-12 19:41:06,558 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=190, Invalid=512, Unknown=0, NotChecked=0, Total=702 [2020-10-12 19:41:06,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47094 states. [2020-10-12 19:41:09,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47094 to 19560. [2020-10-12 19:41:09,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19560 states. [2020-10-12 19:41:09,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19560 states to 19560 states and 29421 transitions. [2020-10-12 19:41:09,639 INFO L78 Accepts]: Start accepts. Automaton has 19560 states and 29421 transitions. Word has length 97 [2020-10-12 19:41:09,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:41:09,639 INFO L479 AbstractCegarLoop]: Abstraction has 19560 states and 29421 transitions. [2020-10-12 19:41:09,640 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 19:41:09,640 INFO L276 IsEmpty]: Start isEmpty. Operand 19560 states and 29421 transitions. [2020-10-12 19:41:09,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-12 19:41:09,839 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:41:09,840 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:41:09,840 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-12 19:41:09,840 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:41:09,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:41:09,840 INFO L82 PathProgramCache]: Analyzing trace with hash -478842247, now seen corresponding path program 1 times [2020-10-12 19:41:09,841 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:41:09,841 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1192306743] [2020-10-12 19:41:09,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:41:09,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:41:09,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:41:09,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:41:09,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:41:09,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:41:10,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:41:10,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:41:10,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:41:13,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:41:13,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:41:13,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:41:14,864 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:41:14,864 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-12 19:41:14,864 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-12 19:41:14,865 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-12 19:41:14,865 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:41:14,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 19:41:14,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:41:14,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-12 19:41:14,865 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:41:15,129 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-12 19:41:15,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:41:15,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:41:15,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:41:15,147 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:41:15,147 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:41:15,147 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:41:15,147 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-12 19:41:15,147 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:41:15,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:41:15,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:41:15,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:41:15,148 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:41:15,169 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:41:15,169 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1192306743] [2020-10-12 19:41:15,170 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 19:41:15,170 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 19:41:15,170 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264995140] [2020-10-12 19:41:15,170 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 19:41:15,170 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:41:15,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 19:41:15,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-12 19:41:15,171 INFO L87 Difference]: Start difference. First operand 19560 states and 29421 transitions. Second operand 11 states. [2020-10-12 19:41:15,360 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2020-10-12 19:41:26,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:41:26,769 INFO L93 Difference]: Finished difference Result 66680 states and 98835 transitions. [2020-10-12 19:41:26,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-12 19:41:26,769 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 97 [2020-10-12 19:41:26,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:41:26,821 INFO L225 Difference]: With dead ends: 66680 [2020-10-12 19:41:26,821 INFO L226 Difference]: Without dead ends: 47226 [2020-10-12 19:41:26,848 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=302, Invalid=888, Unknown=0, NotChecked=0, Total=1190 [2020-10-12 19:41:26,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47226 states. [2020-10-12 19:41:30,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47226 to 19560. [2020-10-12 19:41:30,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19560 states. [2020-10-12 19:41:30,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19560 states to 19560 states and 29157 transitions. [2020-10-12 19:41:30,055 INFO L78 Accepts]: Start accepts. Automaton has 19560 states and 29157 transitions. Word has length 97 [2020-10-12 19:41:30,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:41:30,055 INFO L479 AbstractCegarLoop]: Abstraction has 19560 states and 29157 transitions. [2020-10-12 19:41:30,055 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 19:41:30,055 INFO L276 IsEmpty]: Start isEmpty. Operand 19560 states and 29157 transitions. [2020-10-12 19:41:30,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-10-12 19:41:30,062 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:41:30,063 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:41:30,063 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-12 19:41:30,063 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:41:30,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:41:30,063 INFO L82 PathProgramCache]: Analyzing trace with hash 44805898, now seen corresponding path program 1 times [2020-10-12 19:41:30,064 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:41:30,064 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [314712791] [2020-10-12 19:41:30,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:41:30,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:41:30,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:41:30,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:41:30,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:41:30,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:41:30,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:41:30,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:41:30,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:41:31,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:41:35,094 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:41:35,095 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-12 19:41:35,095 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 19:41:35,095 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-12 19:41:35,095 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:41:35,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 19:41:35,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 19:41:35,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-10-12 19:41:35,096 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:41:35,430 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-12 19:41:35,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:41:35,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:41:35,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:41:35,444 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:41:35,444 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:41:35,445 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:41:35,445 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-12 19:41:35,445 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:41:35,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:41:35,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:41:35,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:41:35,446 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:41:35,472 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 15 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:41:35,473 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [314712791] [2020-10-12 19:41:35,473 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 19:41:35,473 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 19:41:35,473 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096114217] [2020-10-12 19:41:35,474 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 19:41:35,474 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:41:35,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 19:41:35,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-12 19:41:35,474 INFO L87 Difference]: Start difference. First operand 19560 states and 29157 transitions. Second operand 10 states. [2020-10-12 19:41:35,611 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-10-12 19:41:59,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:41:59,079 INFO L93 Difference]: Finished difference Result 131079 states and 194641 transitions. [2020-10-12 19:41:59,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-12 19:41:59,081 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 98 [2020-10-12 19:41:59,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:41:59,242 INFO L225 Difference]: With dead ends: 131079 [2020-10-12 19:41:59,242 INFO L226 Difference]: Without dead ends: 123787 [2020-10-12 19:41:59,273 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=204, Invalid=552, Unknown=0, NotChecked=0, Total=756 [2020-10-12 19:41:59,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123787 states. [2020-10-12 19:42:08,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123787 to 42292. [2020-10-12 19:42:08,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42292 states. [2020-10-12 19:42:08,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42292 states to 42292 states and 63066 transitions. [2020-10-12 19:42:08,497 INFO L78 Accepts]: Start accepts. Automaton has 42292 states and 63066 transitions. Word has length 98 [2020-10-12 19:42:08,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:42:08,497 INFO L479 AbstractCegarLoop]: Abstraction has 42292 states and 63066 transitions. [2020-10-12 19:42:08,497 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 19:42:08,497 INFO L276 IsEmpty]: Start isEmpty. Operand 42292 states and 63066 transitions. [2020-10-12 19:42:08,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-10-12 19:42:08,505 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:42:08,505 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:42:08,505 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-12 19:42:08,505 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:42:08,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:42:08,506 INFO L82 PathProgramCache]: Analyzing trace with hash 368521093, now seen corresponding path program 1 times [2020-10-12 19:42:08,506 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:42:08,506 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [753488477] [2020-10-12 19:42:08,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:42:08,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:42:08,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:42:08,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:42:08,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:42:08,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:42:08,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:42:08,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:42:08,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:42:08,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:42:08,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:42:09,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:42:13,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:42:13,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:42:13,532 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:42:13,532 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-12 19:42:13,532 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-12 19:42:13,532 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-12 19:42:13,533 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:42:13,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 19:42:13,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 19:42:13,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-12 19:42:13,533 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:42:13,870 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-12 19:42:13,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:42:13,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:42:13,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:42:13,885 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:42:13,886 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:42:13,886 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:42:13,886 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-12 19:42:13,886 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:42:13,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 19:42:13,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:42:13,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 19:42:13,886 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:42:13,906 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 17 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:42:13,907 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [753488477] [2020-10-12 19:42:13,907 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 19:42:13,907 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 19:42:13,907 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20764370] [2020-10-12 19:42:13,907 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 19:42:13,907 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:42:13,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 19:42:13,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-10-12 19:42:13,908 INFO L87 Difference]: Start difference. First operand 42292 states and 63066 transitions. Second operand 11 states. [2020-10-12 19:42:14,114 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2020-10-12 19:42:18,936 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 24 [2020-10-12 19:42:40,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 19:42:40,254 INFO L93 Difference]: Finished difference Result 166203 states and 246226 transitions. [2020-10-12 19:42:40,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-12 19:42:40,254 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 98 [2020-10-12 19:42:40,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 19:42:40,411 INFO L225 Difference]: With dead ends: 166203 [2020-10-12 19:42:40,411 INFO L226 Difference]: Without dead ends: 124047 [2020-10-12 19:42:40,456 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=350, Invalid=982, Unknown=0, NotChecked=0, Total=1332 [2020-10-12 19:42:40,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124047 states. [2020-10-12 19:42:50,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124047 to 42292. [2020-10-12 19:42:50,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42292 states. [2020-10-12 19:42:50,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42292 states to 42292 states and 62536 transitions. [2020-10-12 19:42:50,814 INFO L78 Accepts]: Start accepts. Automaton has 42292 states and 62536 transitions. Word has length 98 [2020-10-12 19:42:50,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 19:42:50,815 INFO L479 AbstractCegarLoop]: Abstraction has 42292 states and 62536 transitions. [2020-10-12 19:42:50,815 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 19:42:50,815 INFO L276 IsEmpty]: Start isEmpty. Operand 42292 states and 62536 transitions. [2020-10-12 19:42:50,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-12 19:42:50,822 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 19:42:50,822 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 19:42:50,822 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-12 19:42:50,822 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 19:42:50,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 19:42:50,823 INFO L82 PathProgramCache]: Analyzing trace with hash 45312797, now seen corresponding path program 1 times [2020-10-12 19:42:50,823 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 19:42:50,823 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1800306905] [2020-10-12 19:42:50,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 19:42:50,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:42:50,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:42:50,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:42:50,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:42:50,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:42:50,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:42:51,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:42:51,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:42:52,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:42:52,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:42:52,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:42:55,841 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:42:55,841 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 105 [2020-10-12 19:42:55,842 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-12 19:42:55,842 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-12 19:42:55,842 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:42:55,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 19:42:55,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 19:42:55,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 84 [2020-10-12 19:42:55,842 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:42:56,093 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 28 [2020-10-12 19:42:56,262 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-12 19:42:56,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 19:42:56,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 19:42:56,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 19:42:56,271 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 19:42:56,272 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 19:42:56,272 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 19:42:56,272 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 19:42:56,272 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 19:42:56,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 19:42:56,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 19:42:56,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 19:42:56,272 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 19:42:56,291 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 19:42:56,292 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1800306905] [2020-10-12 19:42:56,292 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 19:42:56,292 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 19:42:56,292 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984920768] [2020-10-12 19:42:56,292 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 19:42:56,293 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 19:42:56,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 19:42:56,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-10-12 19:42:56,293 INFO L87 Difference]: Start difference. First operand 42292 states and 62536 transitions. Second operand 10 states. [2020-10-12 19:42:56,598 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 139